| // Copyright 2013 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef FLUTTER_EMBEDDER_H_ |
| #define FLUTTER_EMBEDDER_H_ |
| |
| #include <stdbool.h> |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| // This file defines an Application Binary Interface (ABI), which requires more |
| // stability than regular code to remain functional for exchanging messages |
| // between different versions of the embedding and the engine, to allow for both |
| // forward and backward compatibility. |
| // |
| // Specifically, |
| // - The order, type, and size of the struct members below must remain the same, |
| // and members should not be removed. |
| // - New structures that are part of the ABI must be defined with "size_t |
| // struct_size;" as their first member, which should be initialized using |
| // "sizeof(Type)". |
| // - Enum values must not change or be removed. |
| // - Enum members without explicit values must not be reordered. |
| // - Function signatures (names, argument counts, argument order, and argument |
| // type) cannot change. |
| // - The core behavior of existing functions cannot change. |
| // |
| // These changes are allowed: |
| // - Adding new struct members at the end of a structure. |
| // - Adding new enum members with a new value. |
| // - Renaming a struct member as long as its type, size, and intent remain the |
| // same. |
| // - Renaming an enum member as long as its value and intent remains the same. |
| // |
| // It is expected that struct members and implicitly-valued enums will not |
| // always be declared in an order that is optimal for the reader, since members |
| // will be added over time, and they can't be reordered. |
| // |
| // Existing functions should continue to appear from the caller's point of view |
| // to operate as they did when they were first introduced, so introduce a new |
| // function instead of modifying the core behavior of a function (and continue |
| // to support the existing function with the previous behavior). |
| |
| #if defined(__cplusplus) |
| extern "C" { |
| #endif |
| |
| #ifndef FLUTTER_EXPORT |
| #define FLUTTER_EXPORT |
| #endif // FLUTTER_EXPORT |
| |
| #ifdef FLUTTER_API_SYMBOL_PREFIX |
| #define FLUTTER_EMBEDDING_CONCAT(a, b) a##b |
| #define FLUTTER_EMBEDDING_ADD_PREFIX(symbol, prefix) \ |
| FLUTTER_EMBEDDING_CONCAT(prefix, symbol) |
| #define FLUTTER_API_SYMBOL(symbol) \ |
| FLUTTER_EMBEDDING_ADD_PREFIX(symbol, FLUTTER_API_SYMBOL_PREFIX) |
| #else |
| #define FLUTTER_API_SYMBOL(symbol) symbol |
| #endif |
| |
| #define FLUTTER_ENGINE_VERSION 1 |
| |
| typedef enum { |
| kSuccess = 0, |
| kInvalidLibraryVersion, |
| kInvalidArguments, |
| kInternalInconsistency, |
| } FlutterEngineResult; |
| |
| typedef enum { |
| kOpenGL, |
| kSoftware, |
| /// Metal is only supported on Darwin platforms (macOS / iOS). |
| /// iOS version >= 10.0 (device), 13.0 (simulator) |
| /// macOS version >= 10.14 |
| kMetal, |
| kVulkan, |
| } FlutterRendererType; |
| |
| /// Additional accessibility features that may be enabled by the platform. |
| /// Must match the `AccessibilityFeatures` enum in window.dart. |
| typedef enum { |
| /// Indicate there is a running accessibility service which is changing the |
| /// interaction model of the device. |
| kFlutterAccessibilityFeatureAccessibleNavigation = 1 << 0, |
| /// Indicate the platform is inverting the colors of the application. |
| kFlutterAccessibilityFeatureInvertColors = 1 << 1, |
| /// Request that animations be disabled or simplified. |
| kFlutterAccessibilityFeatureDisableAnimations = 1 << 2, |
| /// Request that text be rendered at a bold font weight. |
| kFlutterAccessibilityFeatureBoldText = 1 << 3, |
| /// Request that certain animations be simplified and parallax effects |
| /// removed. |
| kFlutterAccessibilityFeatureReduceMotion = 1 << 4, |
| /// Request that UI be rendered with darker colors. |
| kFlutterAccessibilityFeatureHighContrast = 1 << 5, |
| /// Request to show on/off labels inside switches. |
| kFlutterAccessibilityFeatureOnOffSwitchLabels = 1 << 6, |
| } FlutterAccessibilityFeature; |
| |
| /// The set of possible actions that can be conveyed to a semantics node. |
| /// |
| /// Must match the `SemanticsAction` enum in semantics.dart. |
| typedef enum { |
| /// The equivalent of a user briefly tapping the screen with the finger |
| /// without moving it. |
| kFlutterSemanticsActionTap = 1 << 0, |
| /// The equivalent of a user pressing and holding the screen with the finger |
| /// for a few seconds without moving it. |
| kFlutterSemanticsActionLongPress = 1 << 1, |
| /// The equivalent of a user moving their finger across the screen from right |
| /// to left. |
| kFlutterSemanticsActionScrollLeft = 1 << 2, |
| /// The equivalent of a user moving their finger across the screen from left |
| /// to |
| /// right. |
| kFlutterSemanticsActionScrollRight = 1 << 3, |
| /// The equivalent of a user moving their finger across the screen from bottom |
| /// to top. |
| kFlutterSemanticsActionScrollUp = 1 << 4, |
| /// The equivalent of a user moving their finger across the screen from top to |
| /// bottom. |
| kFlutterSemanticsActionScrollDown = 1 << 5, |
| /// Increase the value represented by the semantics node. |
| kFlutterSemanticsActionIncrease = 1 << 6, |
| /// Decrease the value represented by the semantics node. |
| kFlutterSemanticsActionDecrease = 1 << 7, |
| /// A request to fully show the semantics node on screen. |
| kFlutterSemanticsActionShowOnScreen = 1 << 8, |
| /// Move the cursor forward by one character. |
| kFlutterSemanticsActionMoveCursorForwardByCharacter = 1 << 9, |
| /// Move the cursor backward by one character. |
| kFlutterSemanticsActionMoveCursorBackwardByCharacter = 1 << 10, |
| /// Set the text selection to the given range. |
| kFlutterSemanticsActionSetSelection = 1 << 11, |
| /// Copy the current selection to the clipboard. |
| kFlutterSemanticsActionCopy = 1 << 12, |
| /// Cut the current selection and place it in the clipboard. |
| kFlutterSemanticsActionCut = 1 << 13, |
| /// Paste the current content of the clipboard. |
| kFlutterSemanticsActionPaste = 1 << 14, |
| /// Indicate that the node has gained accessibility focus. |
| kFlutterSemanticsActionDidGainAccessibilityFocus = 1 << 15, |
| /// Indicate that the node has lost accessibility focus. |
| kFlutterSemanticsActionDidLoseAccessibilityFocus = 1 << 16, |
| /// Indicate that the user has invoked a custom accessibility action. |
| kFlutterSemanticsActionCustomAction = 1 << 17, |
| /// A request that the node should be dismissed. |
| kFlutterSemanticsActionDismiss = 1 << 18, |
| /// Move the cursor forward by one word. |
| kFlutterSemanticsActionMoveCursorForwardByWord = 1 << 19, |
| /// Move the cursor backward by one word. |
| kFlutterSemanticsActionMoveCursorBackwardByWord = 1 << 20, |
| /// Replace the current text in the text field. |
| kFlutterSemanticsActionSetText = 1 << 21, |
| } FlutterSemanticsAction; |
| |
| /// The set of properties that may be associated with a semantics node. |
| /// |
| /// Must match the `SemanticsFlag` enum in semantics.dart. |
| typedef enum { |
| /// The semantics node has the quality of either being "checked" or |
| /// "unchecked". |
| kFlutterSemanticsFlagHasCheckedState = 1 << 0, |
| /// Whether a semantics node is checked. |
| kFlutterSemanticsFlagIsChecked = 1 << 1, |
| /// Whether a semantics node is selected. |
| kFlutterSemanticsFlagIsSelected = 1 << 2, |
| /// Whether the semantic node represents a button. |
| kFlutterSemanticsFlagIsButton = 1 << 3, |
| /// Whether the semantic node represents a text field. |
| kFlutterSemanticsFlagIsTextField = 1 << 4, |
| /// Whether the semantic node currently holds the user's focus. |
| kFlutterSemanticsFlagIsFocused = 1 << 5, |
| /// The semantics node has the quality of either being "enabled" or |
| /// "disabled". |
| kFlutterSemanticsFlagHasEnabledState = 1 << 6, |
| /// Whether a semantic node that hasEnabledState is currently enabled. |
| kFlutterSemanticsFlagIsEnabled = 1 << 7, |
| /// Whether a semantic node is in a mutually exclusive group. |
| kFlutterSemanticsFlagIsInMutuallyExclusiveGroup = 1 << 8, |
| /// Whether a semantic node is a header that divides content into sections. |
| kFlutterSemanticsFlagIsHeader = 1 << 9, |
| /// Whether the value of the semantics node is obscured. |
| kFlutterSemanticsFlagIsObscured = 1 << 10, |
| /// Whether the semantics node is the root of a subtree for which a route name |
| /// should be announced. |
| kFlutterSemanticsFlagScopesRoute = 1 << 11, |
| /// Whether the semantics node label is the name of a visually distinct route. |
| kFlutterSemanticsFlagNamesRoute = 1 << 12, |
| /// Whether the semantics node is considered hidden. |
| kFlutterSemanticsFlagIsHidden = 1 << 13, |
| /// Whether the semantics node represents an image. |
| kFlutterSemanticsFlagIsImage = 1 << 14, |
| /// Whether the semantics node is a live region. |
| kFlutterSemanticsFlagIsLiveRegion = 1 << 15, |
| /// The semantics node has the quality of either being "on" or "off". |
| kFlutterSemanticsFlagHasToggledState = 1 << 16, |
| /// If true, the semantics node is "on". If false, the semantics node is |
| /// "off". |
| kFlutterSemanticsFlagIsToggled = 1 << 17, |
| /// Whether the platform can scroll the semantics node when the user attempts |
| /// to move the accessibility focus to an offscreen child. |
| /// |
| /// For example, a `ListView` widget has implicit scrolling so that users can |
| /// easily move the accessibility focus to the next set of children. A |
| /// `PageView` widget does not have implicit scrolling, so that users don't |
| /// navigate to the next page when reaching the end of the current one. |
| kFlutterSemanticsFlagHasImplicitScrolling = 1 << 18, |
| /// Whether the value of the semantics node is coming from a multi-line text |
| /// field. |
| /// |
| /// This is used for text fields to distinguish single-line text fields from |
| /// multi-line ones. |
| kFlutterSemanticsFlagIsMultiline = 1 << 19, |
| /// Whether the semantic node is read only. |
| /// |
| /// Only applicable when kFlutterSemanticsFlagIsTextField flag is on. |
| kFlutterSemanticsFlagIsReadOnly = 1 << 20, |
| /// Whether the semantic node can hold the user's focus. |
| kFlutterSemanticsFlagIsFocusable = 1 << 21, |
| /// Whether the semantics node represents a link. |
| kFlutterSemanticsFlagIsLink = 1 << 22, |
| /// Whether the semantics node represents a slider. |
| kFlutterSemanticsFlagIsSlider = 1 << 23, |
| /// Whether the semantics node represents a keyboard key. |
| kFlutterSemanticsFlagIsKeyboardKey = 1 << 24, |
| /// Whether the semantics node represents a tristate checkbox in mixed state. |
| kFlutterSemanticsFlagIsCheckStateMixed = 1 << 25, |
| } FlutterSemanticsFlag; |
| |
| typedef enum { |
| /// Text has unknown text direction. |
| kFlutterTextDirectionUnknown = 0, |
| /// Text is read from right to left. |
| kFlutterTextDirectionRTL = 1, |
| /// Text is read from left to right. |
| kFlutterTextDirectionLTR = 2, |
| } FlutterTextDirection; |
| |
| /// Valid values for priority of Thread. |
| typedef enum { |
| /// Suitable for threads that shouldn't disrupt high priority work. |
| kBackground = 0, |
| /// Default priority level. |
| kNormal = 1, |
| /// Suitable for threads which generate data for the display. |
| kDisplay = 2, |
| /// Suitable for thread which raster data. |
| kRaster = 3, |
| } FlutterThreadPriority; |
| |
| typedef struct _FlutterEngine* FLUTTER_API_SYMBOL(FlutterEngine); |
| |
| typedef struct { |
| /// horizontal scale factor |
| double scaleX; |
| /// horizontal skew factor |
| double skewX; |
| /// horizontal translation |
| double transX; |
| /// vertical skew factor |
| double skewY; |
| /// vertical scale factor |
| double scaleY; |
| /// vertical translation |
| double transY; |
| /// input x-axis perspective factor |
| double pers0; |
| /// input y-axis perspective factor |
| double pers1; |
| /// perspective scale factor |
| double pers2; |
| } FlutterTransformation; |
| |
| typedef void (*VoidCallback)(void* /* user data */); |
| |
| typedef enum { |
| /// Specifies an OpenGL texture target type. Textures are specified using |
| /// the FlutterOpenGLTexture struct. |
| kFlutterOpenGLTargetTypeTexture, |
| /// Specifies an OpenGL frame-buffer target type. Framebuffers are specified |
| /// using the FlutterOpenGLFramebuffer struct. |
| kFlutterOpenGLTargetTypeFramebuffer, |
| } FlutterOpenGLTargetType; |
| |
| /// A pixel format to be used for software rendering. |
| /// |
| /// A single pixel always stored as a POT number of bytes. (so in practice |
| /// either 1, 2, 4, 8, 16 bytes per pixel) |
| /// |
| /// There are two kinds of pixel formats: |
| /// - formats where all components are 8 bits, called array formats |
| /// The component order as specified in the pixel format name is the |
| /// order of the components' bytes in memory, with the leftmost component |
| /// occupying the lowest memory address. |
| /// |
| /// - all other formats are called packed formats, and the component order |
| /// as specified in the format name refers to the order in the native type. |
| /// for example, for kRGB565, the R component uses the 5 least significant |
| /// bits of the uint16_t pixel value. |
| /// |
| /// Each pixel format in this list is documented with an example on how to get |
| /// the color components from the pixel. |
| /// - for packed formats, p is the pixel value as a word. For example, you can |
| /// get the pixel value for a RGB565 formatted buffer like this: |
| /// uint16_t p = ((const uint16_t*) allocation)[row_bytes * y / bpp + x]; |
| /// (with bpp being the bytes per pixel, so 2 for RGB565) |
| /// |
| /// - for array formats, p is a pointer to the pixel value. For example, you |
| /// can get the p for a RGBA8888 formatted buffer like this: |
| /// const uint8_t *p = ((const uint8_t*) allocation) + row_bytes*y + x*4; |
| typedef enum { |
| /// pixel with 8 bit grayscale value. |
| /// The grayscale value is the luma value calculated from r, g, b |
| /// according to BT.709. (gray = r*0.2126 + g*0.7152 + b*0.0722) |
| kGray8, |
| |
| /// pixel with 5 bits red, 6 bits green, 5 bits blue, in 16-bit word. |
| /// r = p & 0x3F; g = (p>>5) & 0x3F; b = p>>11; |
| kRGB565, |
| |
| /// pixel with 4 bits for alpha, red, green, blue; in 16-bit word. |
| /// r = p & 0xF; g = (p>>4) & 0xF; b = (p>>8) & 0xF; a = p>>12; |
| kRGBA4444, |
| |
| /// pixel with 8 bits for red, green, blue, alpha. |
| /// r = p[0]; g = p[1]; b = p[2]; a = p[3]; |
| kRGBA8888, |
| |
| /// pixel with 8 bits for red, green and blue and 8 unused bits. |
| /// r = p[0]; g = p[1]; b = p[2]; |
| kRGBX8888, |
| |
| /// pixel with 8 bits for blue, green, red and alpha. |
| /// r = p[2]; g = p[1]; b = p[0]; a = p[3]; |
| kBGRA8888, |
| |
| /// either kBGRA8888 or kRGBA8888 depending on CPU endianess and OS |
| kNative32, |
| } FlutterSoftwarePixelFormat; |
| |
| typedef struct { |
| /// Target texture of the active texture unit (example GL_TEXTURE_2D or |
| /// GL_TEXTURE_RECTANGLE). |
| uint32_t target; |
| /// The name of the texture. |
| uint32_t name; |
| /// The texture format (example GL_RGBA8). |
| uint32_t format; |
| /// User data to be returned on the invocation of the destruction callback. |
| void* user_data; |
| /// Callback invoked (on an engine managed thread) that asks the embedder to |
| /// collect the texture. |
| VoidCallback destruction_callback; |
| /// Optional parameters for texture height/width, default is 0, non-zero means |
| /// the texture has the specified width/height. Usually, when the texture type |
| /// is GL_TEXTURE_RECTANGLE, we need to specify the texture width/height to |
| /// tell the embedder to scale when rendering. |
| /// Width of the texture. |
| size_t width; |
| /// Height of the texture. |
| size_t height; |
| } FlutterOpenGLTexture; |
| |
| typedef struct { |
| /// The target of the color attachment of the frame-buffer. For example, |
| /// GL_TEXTURE_2D or GL_RENDERBUFFER. In case of ambiguity when dealing with |
| /// Window bound frame-buffers, 0 may be used. |
| uint32_t target; |
| |
| /// The name of the framebuffer. |
| uint32_t name; |
| |
| /// User data to be returned on the invocation of the destruction callback. |
| void* user_data; |
| |
| /// Callback invoked (on an engine managed thread) that asks the embedder to |
| /// collect the framebuffer. |
| VoidCallback destruction_callback; |
| } FlutterOpenGLFramebuffer; |
| |
| typedef bool (*BoolCallback)(void* /* user data */); |
| typedef FlutterTransformation (*TransformationCallback)(void* /* user data */); |
| typedef uint32_t (*UIntCallback)(void* /* user data */); |
| typedef bool (*SoftwareSurfacePresentCallback)(void* /* user data */, |
| const void* /* allocation */, |
| size_t /* row bytes */, |
| size_t /* height */); |
| typedef bool (*SoftwareSurfaceAcquireCallback)(void* /* user data */, |
| size_t /* width */, |
| size_t /* height */, |
| uint8_t** /* buffer out */, |
| size_t* /* stride out */); |
| typedef void* (*ProcResolver)(void* /* user data */, const char* /* name */); |
| typedef bool (*TextureFrameCallback)(void* /* user data */, |
| int64_t /* texture identifier */, |
| size_t /* width */, |
| size_t /* height */, |
| FlutterOpenGLTexture* /* texture out */); |
| typedef void (*VsyncCallback)(void* /* user data */, intptr_t /* baton */); |
| typedef void (*OnPreEngineRestartCallback)(void* /* user data */); |
| |
| /// A structure to represent the width and height. |
| typedef struct { |
| double width; |
| double height; |
| } FlutterSize; |
| |
| /// A structure to represent the width and height. |
| /// |
| /// See: \ref FlutterSize when the value are not integers. |
| typedef struct { |
| uint32_t width; |
| uint32_t height; |
| } FlutterUIntSize; |
| |
| /// A structure to represent a rectangle. |
| typedef struct { |
| double left; |
| double top; |
| double right; |
| double bottom; |
| } FlutterRect; |
| |
| /// A structure to represent a 2D point. |
| typedef struct { |
| double x; |
| double y; |
| } FlutterPoint; |
| |
| /// A structure to represent a rounded rectangle. |
| typedef struct { |
| FlutterRect rect; |
| FlutterSize upper_left_corner_radius; |
| FlutterSize upper_right_corner_radius; |
| FlutterSize lower_right_corner_radius; |
| FlutterSize lower_left_corner_radius; |
| } FlutterRoundedRect; |
| |
| /// A structure to represent a damage region. |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterDamage). |
| size_t struct_size; |
| /// The number of rectangles within the damage region. |
| size_t num_rects; |
| /// The actual damage region(s) in question. |
| FlutterRect* damage; |
| } FlutterDamage; |
| |
| /// This information is passed to the embedder when requesting a frame buffer |
| /// object. |
| /// |
| /// See: \ref FlutterOpenGLRendererConfig.fbo_with_frame_info_callback, |
| /// \ref FlutterMetalRendererConfig.get_next_drawable_callback, |
| /// and \ref FlutterVulkanRendererConfig.get_next_image_callback. |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterFrameInfo). |
| size_t struct_size; |
| /// The size of the surface that will be backed by the fbo. |
| FlutterUIntSize size; |
| } FlutterFrameInfo; |
| |
| /// Callback for when a frame buffer object is requested. |
| typedef uint32_t (*UIntFrameInfoCallback)( |
| void* /* user data */, |
| const FlutterFrameInfo* /* frame info */); |
| |
| /// Callback for when a frame buffer object is requested with necessary |
| /// information for partial repaint. |
| typedef void (*FlutterFrameBufferWithDamageCallback)( |
| void* /* user data */, |
| const intptr_t /* fbo id */, |
| FlutterDamage* /* existing damage */); |
| |
| /// This information is passed to the embedder when a surface is presented. |
| /// |
| /// See: \ref FlutterOpenGLRendererConfig.present_with_info. |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterPresentInfo). |
| size_t struct_size; |
| /// Id of the fbo backing the surface that was presented. |
| uint32_t fbo_id; |
| /// Damage representing the area that the compositor needs to render. |
| FlutterDamage frame_damage; |
| /// Damage used to set the buffer's damage region. |
| FlutterDamage buffer_damage; |
| } FlutterPresentInfo; |
| |
| /// Callback for when a surface is presented. |
| typedef bool (*BoolPresentInfoCallback)( |
| void* /* user data */, |
| const FlutterPresentInfo* /* present info */); |
| |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterOpenGLRendererConfig). |
| size_t struct_size; |
| BoolCallback make_current; |
| BoolCallback clear_current; |
| /// Specifying one (and only one) of `present` or `present_with_info` is |
| /// required. Specifying both is an error and engine initialization will be |
| /// terminated. The return value indicates success of the present call. If |
| /// the intent is to use dirty region management, present_with_info must be |
| /// defined as present will not succeed in communicating information about |
| /// damage. |
| BoolCallback present; |
| /// Specifying one (and only one) of the `fbo_callback` or |
| /// `fbo_with_frame_info_callback` is required. Specifying both is an error |
| /// and engine intialization will be terminated. The return value indicates |
| /// the id of the frame buffer object that flutter will obtain the gl surface |
| /// from. |
| UIntCallback fbo_callback; |
| /// This is an optional callback. Flutter will ask the emebdder to create a GL |
| /// context current on a background thread. If the embedder is able to do so, |
| /// Flutter will assume that this context is in the same sharegroup as the |
| /// main rendering context and use this context for asynchronous texture |
| /// uploads. Though optional, it is recommended that all embedders set this |
| /// callback as it will lead to better performance in texture handling. |
| BoolCallback make_resource_current; |
| /// By default, the renderer config assumes that the FBO does not change for |
| /// the duration of the engine run. If this argument is true, the |
| /// engine will ask the embedder for an updated FBO target (via an |
| /// fbo_callback invocation) after a present call. |
| bool fbo_reset_after_present; |
| /// The transformation to apply to the render target before any rendering |
| /// operations. This callback is optional. |
| /// @attention When using a custom compositor, the layer offset and sizes |
| /// will be affected by this transformation. It will be |
| /// embedder responsibility to render contents at the |
| /// transformed offset and size. This is useful for embedders |
| /// that want to render transformed contents directly into |
| /// hardware overlay planes without having to apply extra |
| /// transformations to layer contents (which may necessitate |
| /// an expensive off-screen render pass). |
| TransformationCallback surface_transformation; |
| ProcResolver gl_proc_resolver; |
| /// When the embedder specifies that a texture has a frame available, the |
| /// engine will call this method (on an internal engine managed thread) so |
| /// that external texture details can be supplied to the engine for subsequent |
| /// composition. |
| TextureFrameCallback gl_external_texture_frame_callback; |
| /// Specifying one (and only one) of the `fbo_callback` or |
| /// `fbo_with_frame_info_callback` is required. Specifying both is an error |
| /// and engine intialization will be terminated. The return value indicates |
| /// the id of the frame buffer object (fbo) that flutter will obtain the gl |
| /// surface from. When using this variant, the embedder is passed a |
| /// `FlutterFrameInfo` struct that indicates the properties of the surface |
| /// that flutter will acquire from the returned fbo. |
| UIntFrameInfoCallback fbo_with_frame_info_callback; |
| /// Specifying one (and only one) of `present` or `present_with_info` is |
| /// required. Specifying both is an error and engine initialization will be |
| /// terminated. When using this variant, the embedder is passed a |
| /// `FlutterPresentInfo` struct that the embedder can use to release any |
| /// resources. The return value indicates success of the present call. This |
| /// callback is essential for dirty region management. If not defined, all the |
| /// pixels on the screen will be rendered at every frame (regardless of |
| /// whether damage is actually being computed or not). This is because the |
| /// information that is passed along to the callback contains the frame and |
| /// buffer damage that are essential for dirty region management. |
| BoolPresentInfoCallback present_with_info; |
| /// Specifying this callback is a requirement for dirty region management. |
| /// Dirty region management will only render the areas of the screen that have |
| /// changed in between frames, greatly reducing rendering times and energy |
| /// consumption. To take advantage of these benefits, it is necessary to |
| /// define populate_existing_damage as a callback that takes user |
| /// data, an FBO ID, and an existing damage FlutterDamage. The callback should |
| /// use the given FBO ID to identify the FBO's exisiting damage (i.e. areas |
| /// that have changed since the FBO was last used) and use it to populate the |
| /// given existing damage variable. This callback is dependent on either |
| /// fbo_callback or fbo_with_frame_info_callback being defined as they are |
| /// responsible for providing populate_existing_damage with the FBO's |
| /// ID. Not specifying populate_existing_damage will result in full |
| /// repaint (i.e. rendering all the pixels on the screen at every frame). |
| FlutterFrameBufferWithDamageCallback populate_existing_damage; |
| } FlutterOpenGLRendererConfig; |
| |
| /// Alias for id<MTLDevice>. |
| typedef const void* FlutterMetalDeviceHandle; |
| |
| /// Alias for id<MTLCommandQueue>. |
| typedef const void* FlutterMetalCommandQueueHandle; |
| |
| /// Alias for id<MTLTexture>. |
| typedef const void* FlutterMetalTextureHandle; |
| |
| /// Pixel format for the external texture. |
| typedef enum { |
| kYUVA, |
| kRGBA, |
| } FlutterMetalExternalTexturePixelFormat; |
| |
| /// YUV color space for the YUV external texture. |
| typedef enum { |
| kBT601FullRange, |
| kBT601LimitedRange, |
| } FlutterMetalExternalTextureYUVColorSpace; |
| |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterMetalExternalTexture). |
| size_t struct_size; |
| /// Height of the texture. |
| size_t width; |
| /// Height of the texture. |
| size_t height; |
| /// The pixel format type of the external. |
| FlutterMetalExternalTexturePixelFormat pixel_format; |
| /// Represents the size of the `textures` array. |
| size_t num_textures; |
| /// Supported textures are YUVA and RGBA, in case of YUVA we expect 2 texture |
| /// handles to be provided by the embedder, Y first and UV next. In case of |
| /// RGBA only one should be passed. |
| /// These are individually aliases for id<MTLTexture>. These textures are |
| /// retained by the engine for the period of the composition. Once these |
| /// textures have been unregistered via the |
| /// `FlutterEngineUnregisterExternalTexture`, the embedder has to release |
| /// these textures. |
| FlutterMetalTextureHandle* textures; |
| /// The YUV color space of the YUV external texture. |
| FlutterMetalExternalTextureYUVColorSpace yuv_color_space; |
| } FlutterMetalExternalTexture; |
| |
| /// Callback to provide an external texture for a given texture_id. |
| /// See: external_texture_frame_callback. |
| typedef bool (*FlutterMetalTextureFrameCallback)( |
| void* /* user data */, |
| int64_t /* texture identifier */, |
| size_t /* width */, |
| size_t /* height */, |
| FlutterMetalExternalTexture* /* texture out */); |
| |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterMetalTexture). |
| size_t struct_size; |
| /// Embedder provided unique identifier to the texture buffer. Given that the |
| /// `texture` handle is passed to the engine to render to, the texture buffer |
| /// is itself owned by the embedder. This `texture_id` is then also given to |
| /// the embedder in the present callback. |
| int64_t texture_id; |
| /// Handle to the MTLTexture that is owned by the embedder. Engine will render |
| /// the frame into this texture. |
| /// |
| /// A NULL texture is considered invalid. |
| FlutterMetalTextureHandle texture; |
| /// A baton that is not interpreted by the engine in any way. It will be given |
| /// back to the embedder in the destruction callback below. Embedder resources |
| /// may be associated with this baton. |
| void* user_data; |
| /// The callback invoked by the engine when it no longer needs this backing |
| /// store. |
| VoidCallback destruction_callback; |
| } FlutterMetalTexture; |
| |
| /// Callback for when a metal texture is requested. |
| typedef FlutterMetalTexture (*FlutterMetalTextureCallback)( |
| void* /* user data */, |
| const FlutterFrameInfo* /* frame info */); |
| |
| /// Callback for when a metal texture is presented. The texture_id here |
| /// corresponds to the texture_id provided by the embedder in the |
| /// `FlutterMetalTextureCallback` callback. |
| typedef bool (*FlutterMetalPresentCallback)( |
| void* /* user data */, |
| const FlutterMetalTexture* /* texture */); |
| |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterMetalRendererConfig). |
| size_t struct_size; |
| /// Alias for id<MTLDevice>. |
| FlutterMetalDeviceHandle device; |
| /// Alias for id<MTLCommandQueue>. |
| FlutterMetalCommandQueueHandle present_command_queue; |
| /// The callback that gets invoked when the engine requests the embedder for a |
| /// texture to render to. |
| FlutterMetalTextureCallback get_next_drawable_callback; |
| /// The callback presented to the embedder to present a fully populated metal |
| /// texture to the user. |
| FlutterMetalPresentCallback present_drawable_callback; |
| /// When the embedder specifies that a texture has a frame available, the |
| /// engine will call this method (on an internal engine managed thread) so |
| /// that external texture details can be supplied to the engine for subsequent |
| /// composition. |
| FlutterMetalTextureFrameCallback external_texture_frame_callback; |
| } FlutterMetalRendererConfig; |
| |
| /// Alias for VkInstance. |
| typedef void* FlutterVulkanInstanceHandle; |
| |
| /// Alias for VkPhysicalDevice. |
| typedef void* FlutterVulkanPhysicalDeviceHandle; |
| |
| /// Alias for VkDevice. |
| typedef void* FlutterVulkanDeviceHandle; |
| |
| /// Alias for VkQueue. |
| typedef void* FlutterVulkanQueueHandle; |
| |
| /// Alias for VkImage. |
| typedef uint64_t FlutterVulkanImageHandle; |
| |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterVulkanImage). |
| size_t struct_size; |
| /// Handle to the VkImage that is owned by the embedder. The engine will |
| /// bind this image for writing the frame. |
| FlutterVulkanImageHandle image; |
| /// The VkFormat of the image (for example: VK_FORMAT_R8G8B8A8_UNORM). |
| uint32_t format; |
| } FlutterVulkanImage; |
| |
| /// Callback to fetch a Vulkan function pointer for a given instance. Normally, |
| /// this should return the results of vkGetInstanceProcAddr. |
| typedef void* (*FlutterVulkanInstanceProcAddressCallback)( |
| void* /* user data */, |
| FlutterVulkanInstanceHandle /* instance */, |
| const char* /* name */); |
| |
| /// Callback for when a VkImage is requested. |
| typedef FlutterVulkanImage (*FlutterVulkanImageCallback)( |
| void* /* user data */, |
| const FlutterFrameInfo* /* frame info */); |
| |
| /// Callback for when a VkImage has been written to and is ready for use by the |
| /// embedder. |
| typedef bool (*FlutterVulkanPresentCallback)( |
| void* /* user data */, |
| const FlutterVulkanImage* /* image */); |
| |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterVulkanRendererConfig). |
| size_t struct_size; |
| |
| /// The Vulkan API version. This should match the value set in |
| /// VkApplicationInfo::apiVersion when the VkInstance was created. |
| uint32_t version; |
| /// VkInstance handle. Must not be destroyed before `FlutterEngineShutdown` is |
| /// called. |
| FlutterVulkanInstanceHandle instance; |
| /// VkPhysicalDevice handle. |
| FlutterVulkanPhysicalDeviceHandle physical_device; |
| /// VkDevice handle. Must not be destroyed before `FlutterEngineShutdown` is |
| /// called. |
| FlutterVulkanDeviceHandle device; |
| /// The queue family index of the VkQueue supplied in the next field. |
| uint32_t queue_family_index; |
| /// VkQueue handle. |
| FlutterVulkanQueueHandle queue; |
| /// The number of instance extensions available for enumerating in the next |
| /// field. |
| size_t enabled_instance_extension_count; |
| /// Array of enabled instance extension names. This should match the names |
| /// passed to `VkInstanceCreateInfo.ppEnabledExtensionNames` when the instance |
| /// was created, but any subset of enabled instance extensions may be |
| /// specified. |
| /// This field is optional; `nullptr` may be specified. |
| /// This memory is only accessed during the call to FlutterEngineInitialize. |
| const char** enabled_instance_extensions; |
| /// The number of device extensions available for enumerating in the next |
| /// field. |
| size_t enabled_device_extension_count; |
| /// Array of enabled logical device extension names. This should match the |
| /// names passed to `VkDeviceCreateInfo.ppEnabledExtensionNames` when the |
| /// logical device was created, but any subset of enabled logical device |
| /// extensions may be specified. |
| /// This field is optional; `nullptr` may be specified. |
| /// This memory is only accessed during the call to FlutterEngineInitialize. |
| /// For example: VK_KHR_GET_MEMORY_REQUIREMENTS_2_EXTENSION_NAME |
| const char** enabled_device_extensions; |
| /// The callback invoked when resolving Vulkan function pointers. |
| FlutterVulkanInstanceProcAddressCallback get_instance_proc_address_callback; |
| /// The callback invoked when the engine requests a VkImage from the embedder |
| /// for rendering the next frame. |
| /// Not used if a FlutterCompositor is supplied in FlutterProjectArgs. |
| FlutterVulkanImageCallback get_next_image_callback; |
| /// The callback invoked when a VkImage has been written to and is ready for |
| /// use by the embedder. Prior to calling this callback, the engine performs |
| /// a host sync, and so the VkImage can be used in a pipeline by the embedder |
| /// without any additional synchronization. |
| /// Not used if a FlutterCompositor is supplied in FlutterProjectArgs. |
| FlutterVulkanPresentCallback present_image_callback; |
| |
| } FlutterVulkanRendererConfig; |
| |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterSoftwareRendererConfig). |
| size_t struct_size; |
| /// The callback presented to the embedder to present a fully populated buffer |
| /// to the user. The pixel format of the buffer is the native 32-bit RGBA |
| /// format. The buffer is owned by the Flutter engine and must be copied in |
| /// this callback if needed. |
| SoftwareSurfacePresentCallback surface_present_callback; |
| /// Optional callback to acquire a surface for software rendering. If this |
| /// callback is not provided, the engine will create a ... |
| SoftwareSurfaceAcquireCallback surface_acquire_callback; |
| } FlutterSoftwareRendererConfig; |
| |
| typedef struct { |
| FlutterRendererType type; |
| union { |
| FlutterOpenGLRendererConfig open_gl; |
| FlutterSoftwareRendererConfig software; |
| FlutterMetalRendererConfig metal; |
| FlutterVulkanRendererConfig vulkan; |
| }; |
| } FlutterRendererConfig; |
| |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterWindowMetricsEvent). |
| size_t struct_size; |
| /// Physical width of the window. |
| size_t width; |
| /// Physical height of the window. |
| size_t height; |
| /// Scale factor for the physical screen. |
| double pixel_ratio; |
| /// Horizontal physical location of the left side of the window on the screen. |
| size_t left; |
| /// Vertical physical location of the top of the window on the screen. |
| size_t top; |
| /// Top inset of window. |
| double physical_view_inset_top; |
| /// Right inset of window. |
| double physical_view_inset_right; |
| /// Bottom inset of window. |
| double physical_view_inset_bottom; |
| /// Left inset of window. |
| double physical_view_inset_left; |
| } FlutterWindowMetricsEvent; |
| |
| /// The phase of the pointer event. |
| typedef enum { |
| kCancel, |
| /// The pointer, which must have been down (see kDown), is now up. |
| /// |
| /// For touch, this means that the pointer is no longer in contact with the |
| /// screen. For a mouse, it means the last button was released. Note that if |
| /// any other buttons are still pressed when one button is released, that |
| /// should be sent as a kMove rather than a kUp. |
| kUp, |
| /// The pointer, which must have been been up, is now down. |
| /// |
| /// For touch, this means that the pointer has come into contact with the |
| /// screen. For a mouse, it means a button is now pressed. Note that if any |
| /// other buttons are already pressed when a new button is pressed, that |
| /// should be sent as a kMove rather than a kDown. |
| kDown, |
| /// The pointer moved while down. |
| /// |
| /// This is also used for changes in button state that don't cause a kDown or |
| /// kUp, such as releasing one of two pressed buttons. |
| kMove, |
| /// The pointer is now sending input to Flutter. For instance, a mouse has |
| /// entered the area where the Flutter content is displayed. |
| /// |
| /// A pointer should always be added before sending any other events. |
| kAdd, |
| /// The pointer is no longer sending input to Flutter. For instance, a mouse |
| /// has left the area where the Flutter content is displayed. |
| /// |
| /// A removed pointer should no longer send events until sending a new kAdd. |
| kRemove, |
| /// The pointer moved while up. |
| kHover, |
| /// A pan/zoom started on this pointer. |
| kPanZoomStart, |
| /// The pan/zoom updated. |
| kPanZoomUpdate, |
| /// The pan/zoom ended. |
| kPanZoomEnd, |
| } FlutterPointerPhase; |
| |
| /// The device type that created a pointer event. |
| typedef enum { |
| kFlutterPointerDeviceKindMouse = 1, |
| kFlutterPointerDeviceKindTouch, |
| kFlutterPointerDeviceKindStylus, |
| kFlutterPointerDeviceKindTrackpad, |
| } FlutterPointerDeviceKind; |
| |
| /// Flags for the `buttons` field of `FlutterPointerEvent` when `device_kind` |
| /// is `kFlutterPointerDeviceKindMouse`. |
| typedef enum { |
| kFlutterPointerButtonMousePrimary = 1 << 0, |
| kFlutterPointerButtonMouseSecondary = 1 << 1, |
| kFlutterPointerButtonMouseMiddle = 1 << 2, |
| kFlutterPointerButtonMouseBack = 1 << 3, |
| kFlutterPointerButtonMouseForward = 1 << 4, |
| /// If a mouse has more than five buttons, send higher bit shifted values |
| /// corresponding to the button number: 1 << 5 for the 6th, etc. |
| } FlutterPointerMouseButtons; |
| |
| /// The type of a pointer signal. |
| typedef enum { |
| kFlutterPointerSignalKindNone, |
| kFlutterPointerSignalKindScroll, |
| kFlutterPointerSignalKindScrollInertiaCancel, |
| kFlutterPointerSignalKindScale, |
| } FlutterPointerSignalKind; |
| |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterPointerEvent). |
| size_t struct_size; |
| FlutterPointerPhase phase; |
| /// The timestamp at which the pointer event was generated. The timestamp |
| /// should be specified in microseconds and the clock should be the same as |
| /// that used by `FlutterEngineGetCurrentTime`. |
| size_t timestamp; |
| /// The x coordinate of the pointer event in physical pixels. |
| double x; |
| /// The y coordinate of the pointer event in physical pixels. |
| double y; |
| /// An optional device identifier. If this is not specified, it is assumed |
| /// that the embedder has no multi-touch capability. |
| int32_t device; |
| FlutterPointerSignalKind signal_kind; |
| /// The x offset of the scroll in physical pixels. |
| double scroll_delta_x; |
| /// The y offset of the scroll in physical pixels. |
| double scroll_delta_y; |
| /// The type of the device generating this event. |
| /// Backwards compatibility note: If this is not set, the device will be |
| /// treated as a mouse, with the primary button set for `kDown` and `kMove`. |
| /// If set explicitly to `kFlutterPointerDeviceKindMouse`, you must set the |
| /// correct buttons. |
| FlutterPointerDeviceKind device_kind; |
| /// The buttons currently pressed, if any. |
| int64_t buttons; |
| /// The x offset of the pan/zoom in physical pixels. |
| double pan_x; |
| /// The y offset of the pan/zoom in physical pixels. |
| double pan_y; |
| /// The scale of the pan/zoom, where 1.0 is the initial scale. |
| double scale; |
| /// The rotation of the pan/zoom in radians, where 0.0 is the initial angle. |
| double rotation; |
| } FlutterPointerEvent; |
| |
| typedef enum { |
| kFlutterKeyEventTypeUp = 1, |
| kFlutterKeyEventTypeDown, |
| kFlutterKeyEventTypeRepeat, |
| } FlutterKeyEventType; |
| |
| /// A structure to represent a key event. |
| /// |
| /// Sending `FlutterKeyEvent` via `FlutterEngineSendKeyEvent` results in a |
| /// corresponding `FlutterKeyEvent` to be dispatched in the framework. It is |
| /// embedder's responsibility to ensure the regularity of sent events, since the |
| /// framework only performs simple one-to-one mapping. The events must conform |
| /// the following rules: |
| /// |
| /// * Each key press sequence shall consist of one key down event (`kind` being |
| /// `kFlutterKeyEventTypeDown`), zero or more repeat events, and one key up |
| /// event, representing a physical key button being pressed, held, and |
| /// released. |
| /// * All events throughout a key press sequence shall have the same `physical` |
| /// and `logical`. Having different `character`s is allowed. |
| /// |
| /// A `FlutterKeyEvent` with `physical` 0 and `logical` 0 is an empty event. |
| /// This is the only case either `physical` or `logical` can be 0. An empty |
| /// event must be sent if a key message should be converted to no |
| /// `FlutterKeyEvent`s, for example, when a key down message is received for a |
| /// key that has already been pressed according to the record. This is to ensure |
| /// some `FlutterKeyEvent` arrives at the framework before raw key message. |
| /// See https://github.com/flutter/flutter/issues/87230. |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterKeyEvent). |
| size_t struct_size; |
| /// The timestamp at which the key event was generated. The timestamp should |
| /// be specified in microseconds and the clock should be the same as that used |
| /// by `FlutterEngineGetCurrentTime`. |
| double timestamp; |
| /// The event kind. |
| FlutterKeyEventType type; |
| /// The USB HID code for the physical key of the event. |
| /// |
| /// For the full definition and list of pre-defined physical keys, see |
| /// `PhysicalKeyboardKey` from the framework. |
| /// |
| /// The only case that `physical` might be 0 is when this is an empty event. |
| /// See `FlutterKeyEvent` for introduction. |
| uint64_t physical; |
| /// The key ID for the logical key of this event. |
| /// |
| /// For the full definition and a list of pre-defined logical keys, see |
| /// `LogicalKeyboardKey` from the framework. |
| /// |
| /// The only case that `logical` might be 0 is when this is an empty event. |
| /// See `FlutterKeyEvent` for introduction. |
| uint64_t logical; |
| /// Null-terminated character input from the event. Can be null. Ignored for |
| /// up events. |
| const char* character; |
| /// True if this event does not correspond to a native event. |
| /// |
| /// The embedder is likely to skip events and/or construct new events that do |
| /// not correspond to any native events in order to conform the regularity |
| /// of events (as documented in `FlutterKeyEvent`). An example is when a key |
| /// up is missed due to loss of window focus, on a platform that provides |
| /// query to key pressing status, the embedder might realize that the key has |
| /// been released at the next key event, and should construct a synthesized up |
| /// event immediately before the actual event. |
| /// |
| /// An event being synthesized means that the `timestamp` might greatly |
| /// deviate from the actual time when the event occurs physically. |
| bool synthesized; |
| } FlutterKeyEvent; |
| |
| typedef void (*FlutterKeyEventCallback)(bool /* handled */, |
| void* /* user_data */); |
| |
| struct _FlutterPlatformMessageResponseHandle; |
| typedef struct _FlutterPlatformMessageResponseHandle |
| FlutterPlatformMessageResponseHandle; |
| |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterPlatformMessage). |
| size_t struct_size; |
| const char* channel; |
| const uint8_t* message; |
| size_t message_size; |
| /// The response handle on which to invoke |
| /// `FlutterEngineSendPlatformMessageResponse` when the response is ready. |
| /// `FlutterEngineSendPlatformMessageResponse` must be called for all messages |
| /// received by the embedder. Failure to call |
| /// `FlutterEngineSendPlatformMessageResponse` will cause a memory leak. It is |
| /// not safe to send multiple responses on a single response object. |
| const FlutterPlatformMessageResponseHandle* response_handle; |
| } FlutterPlatformMessage; |
| |
| typedef void (*FlutterPlatformMessageCallback)( |
| const FlutterPlatformMessage* /* message*/, |
| void* /* user data */); |
| |
| typedef void (*FlutterDataCallback)(const uint8_t* /* data */, |
| size_t /* size */, |
| void* /* user data */); |
| |
| /// The identifier of the platform view. This identifier is specified by the |
| /// application when a platform view is added to the scene via the |
| /// `SceneBuilder.addPlatformView` call. |
| typedef int64_t FlutterPlatformViewIdentifier; |
| |
| /// `FlutterSemanticsNode` ID used as a sentinel to signal the end of a batch of |
| /// semantics node updates. This is unused if using |
| /// `FlutterUpdateSemanticsCallback`. |
| FLUTTER_EXPORT |
| extern const int32_t kFlutterSemanticsNodeIdBatchEnd; |
| |
| /// A node that represents some semantic data. |
| /// |
| /// The semantics tree is maintained during the semantics phase of the pipeline |
| /// (i.e., during PipelineOwner.flushSemantics), which happens after |
| /// compositing. Updates are then pushed to embedders via the registered |
| /// `FlutterUpdateSemanticsCallback`. |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterSemanticsNode). |
| size_t struct_size; |
| /// The unique identifier for this node. |
| int32_t id; |
| /// The set of semantics flags associated with this node. |
| FlutterSemanticsFlag flags; |
| /// The set of semantics actions applicable to this node. |
| FlutterSemanticsAction actions; |
| /// The position at which the text selection originates. |
| int32_t text_selection_base; |
| /// The position at which the text selection terminates. |
| int32_t text_selection_extent; |
| /// The total number of scrollable children that contribute to semantics. |
| int32_t scroll_child_count; |
| /// The index of the first visible semantic child of a scroll node. |
| int32_t scroll_index; |
| /// The current scrolling position in logical pixels if the node is |
| /// scrollable. |
| double scroll_position; |
| /// The maximum in-range value for `scrollPosition` if the node is scrollable. |
| double scroll_extent_max; |
| /// The minimum in-range value for `scrollPosition` if the node is scrollable. |
| double scroll_extent_min; |
| /// The elevation along the z-axis at which the rect of this semantics node is |
| /// located above its parent. |
| double elevation; |
| /// Describes how much space the semantics node takes up along the z-axis. |
| double thickness; |
| /// A textual description of the node. |
| const char* label; |
| /// A brief description of the result of performing an action on the node. |
| const char* hint; |
| /// A textual description of the current value of the node. |
| const char* value; |
| /// A value that `value` will have after a kFlutterSemanticsActionIncrease` |
| /// action has been performed. |
| const char* increased_value; |
| /// A value that `value` will have after a kFlutterSemanticsActionDecrease` |
| /// action has been performed. |
| const char* decreased_value; |
| /// The reading direction for `label`, `value`, `hint`, `increasedValue`, |
| /// `decreasedValue`, and `tooltip`. |
| FlutterTextDirection text_direction; |
| /// The bounding box for this node in its coordinate system. |
| FlutterRect rect; |
| /// The transform from this node's coordinate system to its parent's |
| /// coordinate system. |
| FlutterTransformation transform; |
| /// The number of children this node has. |
| size_t child_count; |
| /// Array of child node IDs in traversal order. Has length `child_count`. |
| const int32_t* children_in_traversal_order; |
| /// Array of child node IDs in hit test order. Has length `child_count`. |
| const int32_t* children_in_hit_test_order; |
| /// The number of custom accessibility action associated with this node. |
| size_t custom_accessibility_actions_count; |
| /// Array of `FlutterSemanticsCustomAction` IDs associated with this node. |
| /// Has length `custom_accessibility_actions_count`. |
| const int32_t* custom_accessibility_actions; |
| /// Identifier of the platform view associated with this semantics node, or |
| /// -1 if none. |
| FlutterPlatformViewIdentifier platform_view_id; |
| /// A textual tooltip attached to the node. |
| const char* tooltip; |
| } FlutterSemanticsNode; |
| |
| /// `FlutterSemanticsCustomAction` ID used as a sentinel to signal the end of a |
| /// batch of semantics custom action updates. This is unused if using |
| /// `FlutterUpdateSemanticsCallback`. |
| FLUTTER_EXPORT |
| extern const int32_t kFlutterSemanticsCustomActionIdBatchEnd; |
| |
| /// A custom semantics action, or action override. |
| /// |
| /// Custom actions can be registered by applications in order to provide |
| /// semantic actions other than the standard actions available through the |
| /// `FlutterSemanticsAction` enum. |
| /// |
| /// Action overrides are custom actions that the application developer requests |
| /// to be used in place of the standard actions in the `FlutterSemanticsAction` |
| /// enum. |
| typedef struct { |
| /// The size of the struct. Must be sizeof(FlutterSemanticsCustomAction). |
| size_t struct_size; |
| /// The unique custom action or action override ID. |
| int32_t id; |
| /// For overridden standard actions, corresponds to the |
| /// `FlutterSemanticsAction` to override. |
| FlutterSemanticsAction override_action; |
| /// The user-readable name of this custom semantics action. |
| const char* label; |
| /// The hint description of this custom semantics action. |
| const char* hint; |
| } FlutterSemanticsCustomAction; |
| |
| /// A batch of updates to semantics nodes and custom actions. |
| typedef struct { |
| /// The size of the struct. Must be sizeof(FlutterSemanticsUpdate). |
| size_t struct_size; |
| /// The number of semantics node updates. |
| size_t nodes_count; |
| // Array of semantics nodes. Has length `nodes_count`. |
| FlutterSemanticsNode* nodes; |
| /// The number of semantics custom action updates. |
| size_t custom_actions_count; |
| /// Array of semantics custom actions. Has length `custom_actions_count`. |
| FlutterSemanticsCustomAction* custom_actions; |
| } FlutterSemanticsUpdate; |
| |
| typedef void (*FlutterUpdateSemanticsNodeCallback)( |
| const FlutterSemanticsNode* /* semantics node */, |
| void* /* user data */); |
| |
| typedef void (*FlutterUpdateSemanticsCustomActionCallback)( |
| const FlutterSemanticsCustomAction* /* semantics custom action */, |
| void* /* user data */); |
| |
| typedef void (*FlutterUpdateSemanticsCallback)( |
| const FlutterSemanticsUpdate* /* semantics update */, |
| void* /* user data*/); |
| |
| typedef struct _FlutterTaskRunner* FlutterTaskRunner; |
| |
| typedef struct { |
| FlutterTaskRunner runner; |
| uint64_t task; |
| } FlutterTask; |
| |
| typedef void (*FlutterTaskRunnerPostTaskCallback)( |
| FlutterTask /* task */, |
| uint64_t /* target time nanos */, |
| void* /* user data */); |
| |
| /// An interface used by the Flutter engine to execute tasks at the target time |
| /// on a specified thread. There should be a 1-1 relationship between a thread |
| /// and a task runner. It is undefined behavior to run a task on a thread that |
| /// is not associated with its task runner. |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterTaskRunnerDescription). |
| size_t struct_size; |
| void* user_data; |
| /// May be called from any thread. Should return true if tasks posted on the |
| /// calling thread will be run on that same thread. |
| /// |
| /// @attention This field is required. |
| BoolCallback runs_task_on_current_thread_callback; |
| /// May be called from any thread. The given task should be executed by the |
| /// embedder on the thread associated with that task runner by calling |
| /// `FlutterEngineRunTask` at the given target time. The system monotonic |
| /// clock should be used for the target time. The target time is the absolute |
| /// time from epoch (NOT a delta) at which the task must be returned back to |
| /// the engine on the correct thread. If the embedder needs to calculate a |
| /// delta, `FlutterEngineGetCurrentTime` may be called and the difference used |
| /// as the delta. |
| /// |
| /// @attention This field is required. |
| FlutterTaskRunnerPostTaskCallback post_task_callback; |
| /// A unique identifier for the task runner. If multiple task runners service |
| /// tasks on the same thread, their identifiers must match. |
| size_t identifier; |
| } FlutterTaskRunnerDescription; |
| |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterCustomTaskRunners). |
| size_t struct_size; |
| /// Specify the task runner for the thread on which the `FlutterEngineRun` |
| /// call is made. The same task runner description can be specified for both |
| /// the render and platform task runners. This makes the Flutter engine use |
| /// the same thread for both task runners. |
| const FlutterTaskRunnerDescription* platform_task_runner; |
| /// Specify the task runner for the thread on which the render tasks will be |
| /// run. The same task runner description can be specified for both the render |
| /// and platform task runners. This makes the Flutter engine use the same |
| /// thread for both task runners. |
| const FlutterTaskRunnerDescription* render_task_runner; |
| /// Specify a callback that is used to set the thread priority for embedder |
| /// task runners. |
| void (*thread_priority_setter)(FlutterThreadPriority); |
| } FlutterCustomTaskRunners; |
| |
| typedef struct { |
| /// The type of the OpenGL backing store. Currently, it can either be a |
| /// texture or a framebuffer. |
| FlutterOpenGLTargetType type; |
| union { |
| /// A texture for Flutter to render into. |
| FlutterOpenGLTexture texture; |
| /// A framebuffer for Flutter to render into. The embedder must ensure that |
| /// the framebuffer is complete. |
| FlutterOpenGLFramebuffer framebuffer; |
| }; |
| } FlutterOpenGLBackingStore; |
| |
| typedef struct { |
| /// A pointer to the raw bytes of the allocation described by this software |
| /// backing store. |
| const void* allocation; |
| /// The number of bytes in a single row of the allocation. |
| size_t row_bytes; |
| /// The number of rows in the allocation. |
| size_t height; |
| /// A baton that is not interpreted by the engine in any way. It will be given |
| /// back to the embedder in the destruction callback below. Embedder resources |
| /// may be associated with this baton. |
| void* user_data; |
| /// The callback invoked by the engine when it no longer needs this backing |
| /// store. |
| VoidCallback destruction_callback; |
| } FlutterSoftwareBackingStore; |
| |
| typedef struct { |
| size_t struct_size; |
| /// A pointer to the raw bytes of the allocation described by this software |
| /// backing store. |
| const void* allocation; |
| /// The number of bytes in a single row of the allocation. |
| size_t row_bytes; |
| /// The number of rows in the allocation. |
| size_t height; |
| /// A baton that is not interpreted by the engine in any way. It will be given |
| /// back to the embedder in the destruction callback below. Embedder resources |
| /// may be associated with this baton. |
| void* user_data; |
| /// The callback invoked by the engine when it no longer needs this backing |
| /// store. |
| VoidCallback destruction_callback; |
| /// The pixel format that the engine should use to render into the allocation. |
| /// In most cases, kR |
| FlutterSoftwarePixelFormat pixel_format; |
| } FlutterSoftwareBackingStore2; |
| |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterMetalBackingStore). |
| size_t struct_size; |
| union { |
| // A Metal texture for Flutter to render into. Ownership is not transferred |
| // to Flutter; the texture is CFRetained on successfully being passed in and |
| // CFReleased when no longer used. |
| FlutterMetalTexture texture; |
| }; |
| } FlutterMetalBackingStore; |
| |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterVulkanBackingStore). |
| size_t struct_size; |
| /// The image that the layer will be rendered to. This image must already be |
| /// available for the engine to bind for writing when it's given to the engine |
| /// via the backing store creation callback. The engine will perform a host |
| /// sync for all layers prior to calling the compositor present callback, and |
| /// so the written layer images can be freely bound by the embedder without |
| /// any additional synchronization. |
| const FlutterVulkanImage* image; |
| /// A baton that is not interpreted by the engine in any way. It will be given |
| /// back to the embedder in the destruction callback below. Embedder resources |
| /// may be associated with this baton. |
| void* user_data; |
| /// The callback invoked by the engine when it no longer needs this backing |
| /// store. |
| VoidCallback destruction_callback; |
| } FlutterVulkanBackingStore; |
| |
| typedef enum { |
| /// Indicates that the Flutter application requested that an opacity be |
| /// applied to the platform view. |
| kFlutterPlatformViewMutationTypeOpacity, |
| /// Indicates that the Flutter application requested that the platform view be |
| /// clipped using a rectangle. |
| kFlutterPlatformViewMutationTypeClipRect, |
| /// Indicates that the Flutter application requested that the platform view be |
| /// clipped using a rounded rectangle. |
| kFlutterPlatformViewMutationTypeClipRoundedRect, |
| /// Indicates that the Flutter application requested that the platform view be |
| /// transformed before composition. |
| kFlutterPlatformViewMutationTypeTransformation, |
| } FlutterPlatformViewMutationType; |
| |
| typedef struct { |
| /// The type of the mutation described by the subsequent union. |
| FlutterPlatformViewMutationType type; |
| union { |
| double opacity; |
| FlutterRect clip_rect; |
| FlutterRoundedRect clip_rounded_rect; |
| FlutterTransformation transformation; |
| }; |
| } FlutterPlatformViewMutation; |
| |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterPlatformView). |
| size_t struct_size; |
| /// The identifier of this platform view. This identifier is specified by the |
| /// application when a platform view is added to the scene via the |
| /// `SceneBuilder.addPlatformView` call. |
| FlutterPlatformViewIdentifier identifier; |
| /// The number of mutations to be applied to the platform view by the embedder |
| /// before on-screen composition. |
| size_t mutations_count; |
| /// The mutations to be applied by this platform view before it is composited |
| /// on-screen. The Flutter application may transform the platform view but |
| /// these transformations cannot be affected by the Flutter compositor because |
| /// it does not render platform views. Since the embedder is responsible for |
| /// composition of these views, it is also the embedder's responsibility to |
| /// affect the appropriate transformation. |
| /// |
| /// The mutations must be applied in order. The mutations done in the |
| /// collection don't take into account the device pixel ratio or the root |
| /// surface transformation. If these exist, the first mutation in the list |
| /// will be a transformation mutation to make sure subsequent mutations are in |
| /// the correct coordinate space. |
| const FlutterPlatformViewMutation** mutations; |
| } FlutterPlatformView; |
| |
| typedef enum { |
| /// Specifies an OpenGL backing store. Can either be an OpenGL texture or |
| /// framebuffer. |
| kFlutterBackingStoreTypeOpenGL, |
| /// Specified an software allocation for Flutter to render into using the CPU. |
| kFlutterBackingStoreTypeSoftware, |
| /// Specifies a Metal backing store. This is backed by a Metal texture. |
| kFlutterBackingStoreTypeMetal, |
| /// Specifies a Vulkan backing store. This is backed by a Vulkan VkImage. |
| kFlutterBackingStoreTypeVulkan, |
| /// Specifies a allocation that the engine should render into using |
| /// software rendering. |
| kFlutterBackingStoreTypeSoftware2, |
| } FlutterBackingStoreType; |
| |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterBackingStore). |
| size_t struct_size; |
| /// A baton that is not interpreted by the engine in any way. The embedder may |
| /// use this to associate resources that are tied to the lifecycle of the |
| /// `FlutterBackingStore`. |
| void* user_data; |
| /// Specifies the type of backing store. |
| FlutterBackingStoreType type; |
| /// Indicates if this backing store was updated since the last time it was |
| /// associated with a presented layer. |
| bool did_update; |
| union { |
| /// The description of the OpenGL backing store. |
| FlutterOpenGLBackingStore open_gl; |
| /// The description of the software backing store. |
| FlutterSoftwareBackingStore software; |
| /// The description of the software backing store. |
| FlutterSoftwareBackingStore2 software2; |
| // The description of the Metal backing store. |
| FlutterMetalBackingStore metal; |
| // The description of the Vulkan backing store. |
| FlutterVulkanBackingStore vulkan; |
| }; |
| } FlutterBackingStore; |
| |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterBackingStoreConfig). |
| size_t struct_size; |
| /// The size of the render target the engine expects to render into. |
| FlutterSize size; |
| } FlutterBackingStoreConfig; |
| |
| typedef enum { |
| /// Indicates that the contents of this layer are rendered by Flutter into a |
| /// backing store. |
| kFlutterLayerContentTypeBackingStore, |
| /// Indicates that the contents of this layer are determined by the embedder. |
| kFlutterLayerContentTypePlatformView, |
| } FlutterLayerContentType; |
| |
| typedef struct { |
| /// This size of this struct. Must be sizeof(FlutterLayer). |
| size_t struct_size; |
| /// Each layer displays contents in one way or another. The type indicates |
| /// whether those contents are specified by Flutter or the embedder. |
| FlutterLayerContentType type; |
| union { |
| /// Indicates that the contents of this layer are rendered by Flutter into a |
| /// backing store. |
| const FlutterBackingStore* backing_store; |
| /// Indicates that the contents of this layer are determined by the |
| /// embedder. |
| const FlutterPlatformView* platform_view; |
| }; |
| /// The offset of this layer (in physical pixels) relative to the top left of |
| /// the root surface used by the engine. |
| FlutterPoint offset; |
| /// The size of the layer (in physical pixels). |
| FlutterSize size; |
| } FlutterLayer; |
| |
| typedef bool (*FlutterBackingStoreCreateCallback)( |
| const FlutterBackingStoreConfig* config, |
| FlutterBackingStore* backing_store_out, |
| void* user_data); |
| |
| typedef bool (*FlutterBackingStoreCollectCallback)( |
| const FlutterBackingStore* renderer, |
| void* user_data); |
| |
| typedef bool (*FlutterLayersPresentCallback)(const FlutterLayer** layers, |
| size_t layers_count, |
| void* user_data); |
| |
| typedef struct { |
| /// This size of this struct. Must be sizeof(FlutterCompositor). |
| size_t struct_size; |
| /// A baton that in not interpreted by the engine in any way. If it passed |
| /// back to the embedder in `FlutterCompositor.create_backing_store_callback`, |
| /// `FlutterCompositor.collect_backing_store_callback` and |
| /// `FlutterCompositor.present_layers_callback` |
| void* user_data; |
| /// A callback invoked by the engine to obtain a backing store for a specific |
| /// `FlutterLayer`. |
| /// |
| /// On ABI stability: Callers must take care to restrict access within |
| /// `FlutterBackingStore::struct_size` when specifying a new backing store to |
| /// the engine. This only matters if the embedder expects to be used with |
| /// engines older than the version whose headers it used during compilation. |
| FlutterBackingStoreCreateCallback create_backing_store_callback; |
| /// A callback invoked by the engine to release the backing store. The |
| /// embedder may collect any resources associated with the backing store. |
| FlutterBackingStoreCollectCallback collect_backing_store_callback; |
| /// Callback invoked by the engine to composite the contents of each layer |
| /// onto the screen. |
| FlutterLayersPresentCallback present_layers_callback; |
| /// Avoid caching backing stores provided by this compositor. |
| bool avoid_backing_store_cache; |
| } FlutterCompositor; |
| |
| typedef struct { |
| /// This size of this struct. Must be sizeof(FlutterLocale). |
| size_t struct_size; |
| /// The language code of the locale. For example, "en". This is a required |
| /// field. The string must be null terminated. It may be collected after the |
| /// call to `FlutterEngineUpdateLocales`. |
| const char* language_code; |
| /// The country code of the locale. For example, "US". This is a an optional |
| /// field. The string must be null terminated if present. It may be collected |
| /// after the call to `FlutterEngineUpdateLocales`. If not present, a |
| /// `nullptr` may be specified. |
| const char* country_code; |
| /// The script code of the locale. This is a an optional field. The string |
| /// must be null terminated if present. It may be collected after the call to |
| /// `FlutterEngineUpdateLocales`. If not present, a `nullptr` may be |
| /// specified. |
| const char* script_code; |
| /// The variant code of the locale. This is a an optional field. The string |
| /// must be null terminated if present. It may be collected after the call to |
| /// `FlutterEngineUpdateLocales`. If not present, a `nullptr` may be |
| /// specified. |
| const char* variant_code; |
| } FlutterLocale; |
| |
| /// Callback that returns the system locale. |
| /// |
| /// Embedders that implement this callback should return the `FlutterLocale` |
| /// from the `supported_locales` list that most closely matches the |
| /// user/device's preferred locale. |
| /// |
| /// This callback does not currently provide the user_data baton. |
| /// https://github.com/flutter/flutter/issues/79826 |
| typedef const FlutterLocale* (*FlutterComputePlatformResolvedLocaleCallback)( |
| const FlutterLocale** /* supported_locales*/, |
| size_t /* Number of locales*/); |
| |
| /// Display refers to a graphics hardware system consisting of a framebuffer, |
| /// typically a monitor or a screen. This ID is unique per display and is |
| /// stable until the Flutter application restarts. |
| typedef uint64_t FlutterEngineDisplayId; |
| |
| typedef struct { |
| /// This size of this struct. Must be sizeof(FlutterDisplay). |
| size_t struct_size; |
| |
| FlutterEngineDisplayId display_id; |
| |
| /// This is set to true if the embedder only has one display. In cases where |
| /// this is set to true, the value of display_id is ignored. In cases where |
| /// this is not set to true, it is expected that a valid display_id be |
| /// provided. |
| bool single_display; |
| |
| /// This represents the refresh period in frames per second. This value may be |
| /// zero if the device is not running or unavailable or unknown. |
| double refresh_rate; |
| } FlutterEngineDisplay; |
| |
| /// The update type parameter that is passed to |
| /// `FlutterEngineNotifyDisplayUpdate`. |
| typedef enum { |
| /// `FlutterEngineDisplay`s that were active during start-up. A display is |
| /// considered active if: |
| /// 1. The frame buffer hardware is connected. |
| /// 2. The display is drawable, e.g. it isn't being mirrored from another |
| /// connected display or sleeping. |
| kFlutterEngineDisplaysUpdateTypeStartup, |
| kFlutterEngineDisplaysUpdateTypeCount, |
| } FlutterEngineDisplaysUpdateType; |
| |
| typedef int64_t FlutterEngineDartPort; |
| |
| typedef enum { |
| kFlutterEngineDartObjectTypeNull, |
| kFlutterEngineDartObjectTypeBool, |
| kFlutterEngineDartObjectTypeInt32, |
| kFlutterEngineDartObjectTypeInt64, |
| kFlutterEngineDartObjectTypeDouble, |
| kFlutterEngineDartObjectTypeString, |
| /// The object will be made available to Dart code as an instance of |
| /// Uint8List. |
| kFlutterEngineDartObjectTypeBuffer, |
| } FlutterEngineDartObjectType; |
| |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterEngineDartBuffer). |
| size_t struct_size; |
| /// An opaque baton passed back to the embedder when the |
| /// buffer_collect_callback is invoked. The engine does not interpret this |
| /// field in any way. |
| void* user_data; |
| /// This is an optional field. |
| /// |
| /// When specified, the engine will assume that the buffer is owned by the |
| /// embedder. When the data is no longer needed by any isolate, this callback |
| /// will be made on an internal engine managed thread. The embedder is free to |
| /// collect the buffer here. When this field is specified, it is the embedders |
| /// responsibility to keep the buffer alive and not modify it till this |
| /// callback is invoked by the engine. The user data specified in the callback |
| /// is the value of `user_data` field in this struct. |
| /// |
| /// When NOT specified, the VM creates an internal copy of the buffer. The |
| /// caller is free to modify the buffer as necessary or collect it immediately |
| /// after the call to `FlutterEnginePostDartObject`. |
| /// |
| /// @attention The buffer_collect_callback is will only be invoked by the |
| /// engine when the `FlutterEnginePostDartObject` method |
| /// returns kSuccess. In case of non-successful calls to this |
| /// method, it is the embedders responsibility to collect the |
| /// buffer. |
| VoidCallback buffer_collect_callback; |
| /// A pointer to the bytes of the buffer. When the buffer is owned by the |
| /// embedder (by specifying the `buffer_collect_callback`), Dart code may |
| /// modify that embedder owned buffer. For this reason, it is important that |
| /// this buffer not have page protections that restrict writing to this |
| /// buffer. |
| uint8_t* buffer; |
| /// The size of the buffer. |
| size_t buffer_size; |
| } FlutterEngineDartBuffer; |
| |
| /// This struct specifies the native representation of a Dart object that can be |
| /// sent via a send port to any isolate in the VM that has the corresponding |
| /// receive port. |
| /// |
| /// All fields in this struct are copied out in the call to |
| /// `FlutterEnginePostDartObject` and the caller is free to reuse or collect |
| /// this struct after that call. |
| typedef struct { |
| FlutterEngineDartObjectType type; |
| union { |
| bool bool_value; |
| int32_t int32_value; |
| int64_t int64_value; |
| double double_value; |
| /// A null terminated string. This string will be copied by the VM in the |
| /// call to `FlutterEnginePostDartObject` and must be collected by the |
| /// embedder after that call is made. |
| const char* string_value; |
| const FlutterEngineDartBuffer* buffer_value; |
| }; |
| } FlutterEngineDartObject; |
| |
| /// This enum allows embedders to determine the type of the engine thread in the |
| /// FlutterNativeThreadCallback. Based on the thread type, the embedder may be |
| /// able to tweak the thread priorities for optimum performance. |
| typedef enum { |
| /// The Flutter Engine considers the thread on which the FlutterEngineRun call |
| /// is made to be the platform thread. There is only one such thread per |
| /// engine instance. |
| kFlutterNativeThreadTypePlatform, |
| /// This is the thread the Flutter Engine uses to execute rendering commands |
| /// based on the selected client rendering API. There is only one such thread |
| /// per engine instance. |
| kFlutterNativeThreadTypeRender, |
| /// This is a dedicated thread on which the root Dart isolate is serviced. |
| /// There is only one such thread per engine instance. |
| kFlutterNativeThreadTypeUI, |
| /// Multiple threads are used by the Flutter engine to perform long running |
| /// background tasks. |
| kFlutterNativeThreadTypeWorker, |
| } FlutterNativeThreadType; |
| |
| /// A callback made by the engine in response to |
| /// `FlutterEnginePostCallbackOnAllNativeThreads` on all internal thread. |
| typedef void (*FlutterNativeThreadCallback)(FlutterNativeThreadType type, |
| void* user_data); |
| |
| /// AOT data source type. |
| typedef enum { |
| kFlutterEngineAOTDataSourceTypeElfPath |
| } FlutterEngineAOTDataSourceType; |
| |
| /// This struct specifies one of the various locations the engine can look for |
| /// AOT data sources. |
| typedef struct { |
| FlutterEngineAOTDataSourceType type; |
| union { |
| /// Absolute path to an ELF library file. |
| const char* elf_path; |
| }; |
| } FlutterEngineAOTDataSource; |
| |
| // Logging callback for Dart application messages. |
| // |
| // The `tag` parameter contains a null-terminated string containing a logging |
| // tag or component name that can be used to identify system log messages from |
| // the app. The `message` parameter contains a null-terminated string |
| // containing the message to be logged. `user_data` is a user data baton passed |
| // in `FlutterEngineRun`. |
| typedef void (*FlutterLogMessageCallback)(const char* /* tag */, |
| const char* /* message */, |
| void* /* user_data */); |
| |
| /// An opaque object that describes the AOT data that can be used to launch a |
| /// FlutterEngine instance in AOT mode. |
| typedef struct _FlutterEngineAOTData* FlutterEngineAOTData; |
| |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterProjectArgs). |
| size_t struct_size; |
| /// The path to the Flutter assets directory containing project assets. The |
| /// string can be collected after the call to `FlutterEngineRun` returns. The |
| /// string must be NULL terminated. |
| const char* assets_path; |
| /// The path to the Dart file containing the `main` entry point. |
| /// The string can be collected after the call to `FlutterEngineRun` returns. |
| /// The string must be NULL terminated. |
| /// |
| /// @deprecated As of Dart 2, running from Dart source is no longer |
| /// supported. Dart code should now be compiled to kernel form |
| /// and will be loaded by from `kernel_blob.bin` in the assets |
| /// directory. This struct member is retained for ABI |
| /// stability. |
| const char* main_path__unused__; |
| /// The path to the `.packages` file for the project. The string can be |
| /// collected after the call to `FlutterEngineRun` returns. The string must be |
| /// NULL terminated. |
| /// |
| /// @deprecated As of Dart 2, running from Dart source is no longer |
| /// supported. Dart code should now be compiled to kernel form |
| /// and will be loaded by from `kernel_blob.bin` in the assets |
| /// directory. This struct member is retained for ABI |
| /// stability. |
| const char* packages_path__unused__; |
| /// The path to the `icudtl.dat` file for the project. The string can be |
| /// collected after the call to `FlutterEngineRun` returns. The string must |
| /// be NULL terminated. |
| const char* icu_data_path; |
| /// The command line argument count used to initialize the project. |
| int command_line_argc; |
| /// The command line arguments used to initialize the project. The strings can |
| /// be collected after the call to `FlutterEngineRun` returns. The strings |
| /// must be `NULL` terminated. |
| /// |
| /// @attention The first item in the command line (if specified at all) is |
| /// interpreted as the executable name. So if an engine flag |
| /// needs to be passed into the same, it needs to not be the |
| /// very first item in the list. |
| /// |
| /// The set of engine flags are only meant to control |
| /// unstable features in the engine. Deployed applications should not pass any |
| /// command line arguments at all as they may affect engine stability at |
| /// runtime in the presence of un-sanitized input. The list of currently |
| /// recognized engine flags and their descriptions can be retrieved from the |
| /// `switches.h` engine source file. |
| const char* const* command_line_argv; |
| /// The callback invoked by the engine in order to give the embedder the |
| /// chance to respond to platform messages from the Dart application. |
| /// The callback will be invoked on the thread on which the `FlutterEngineRun` |
| /// call is made. The second parameter, `user_data`, is supplied when |
| /// `FlutterEngineRun` or `FlutterEngineInitialize` is called. |
| FlutterPlatformMessageCallback platform_message_callback; |
| /// The VM snapshot data buffer used in AOT operation. This buffer must be |
| /// mapped in as read-only. For more information refer to the documentation on |
| /// the Wiki at |
| /// https://github.com/flutter/flutter/wiki/Flutter-engine-operation-in-AOT-Mode |
| const uint8_t* vm_snapshot_data; |
| /// The size of the VM snapshot data buffer. If vm_snapshot_data is a symbol |
| /// reference, 0 may be passed here. |
| size_t vm_snapshot_data_size; |
| /// The VM snapshot instructions buffer used in AOT operation. This buffer |
| /// must be mapped in as read-execute. For more information refer to the |
| /// documentation on the Wiki at |
| /// https://github.com/flutter/flutter/wiki/Flutter-engine-operation-in-AOT-Mode |
| const uint8_t* vm_snapshot_instructions; |
| /// The size of the VM snapshot instructions buffer. If |
| /// vm_snapshot_instructions is a symbol reference, 0 may be passed here. |
| size_t vm_snapshot_instructions_size; |
| /// The isolate snapshot data buffer used in AOT operation. This buffer must |
| /// be mapped in as read-only. For more information refer to the documentation |
| /// on the Wiki at |
| /// https://github.com/flutter/flutter/wiki/Flutter-engine-operation-in-AOT-Mode |
| const uint8_t* isolate_snapshot_data; |
| /// The size of the isolate snapshot data buffer. If isolate_snapshot_data is |
| /// a symbol reference, 0 may be passed here. |
| size_t isolate_snapshot_data_size; |
| /// The isolate snapshot instructions buffer used in AOT operation. This |
| /// buffer must be mapped in as read-execute. For more information refer to |
| /// the documentation on the Wiki at |
| /// https://github.com/flutter/flutter/wiki/Flutter-engine-operation-in-AOT-Mode |
| const uint8_t* isolate_snapshot_instructions; |
| /// The size of the isolate snapshot instructions buffer. If |
| /// isolate_snapshot_instructions is a symbol reference, 0 may be passed here. |
| size_t isolate_snapshot_instructions_size; |
| /// The callback invoked by the engine in root isolate scope. Called |
| /// immediately after the root isolate has been created and marked runnable. |
| VoidCallback root_isolate_create_callback; |
| /// The legacy callback invoked by the engine in order to give the embedder |
| /// the chance to respond to semantics node updates from the Dart application. |
| /// Semantics node updates are sent in batches terminated by a 'batch end' |
| /// callback that is passed a sentinel `FlutterSemanticsNode` whose `id` field |
| /// has the value `kFlutterSemanticsNodeIdBatchEnd`. |
| /// |
| /// The callback will be invoked on the thread on which the `FlutterEngineRun` |
| /// call is made. |
| /// |
| /// @deprecated Prefer using `update_semantics_callback` instead. If this |
| /// calback is provided, `update_semantics_callback` must not |
| /// be provided. |
| FlutterUpdateSemanticsNodeCallback update_semantics_node_callback; |
| /// The legacy callback invoked by the engine in order to give the embedder |
| /// the chance to respond to updates to semantics custom actions from the Dart |
| /// application. Custom action updates are sent in batches terminated by a |
| /// 'batch end' callback that is passed a sentinel |
| /// `FlutterSemanticsCustomAction` whose `id` field has the value |
| /// `kFlutterSemanticsCustomActionIdBatchEnd`. |
| /// |
| /// The callback will be invoked on the thread on which the `FlutterEngineRun` |
| /// call is made. |
| /// |
| /// @deprecated Prefer using `update_semantics_callback` instead. If this |
| /// calback is provided, `update_semantics_callback` must not |
| /// be provided. |
| FlutterUpdateSemanticsCustomActionCallback |
| update_semantics_custom_action_callback; |
| /// Path to a directory used to store data that is cached across runs of a |
| /// Flutter application (such as compiled shader programs used by Skia). |
| /// This is optional. The string must be NULL terminated. |
| /// |
| // This is different from the cache-path-dir argument defined in switches.h, |
| // which is used in `flutter::Settings` as `temp_directory_path`. |
| const char* persistent_cache_path; |
| |
| /// If true, the engine would only read the existing cache, but not write new |
| /// ones. |
| bool is_persistent_cache_read_only; |
| |
| /// A callback that gets invoked by the engine when it attempts to wait for a |
| /// platform vsync event. The engine will give the platform a baton that needs |
| /// to be returned back to the engine via `FlutterEngineOnVsync`. All batons |
| /// must be retured to the engine before initializing a |
| /// `FlutterEngineShutdown`. Not doing the same will result in a memory leak. |
| /// While the call to `FlutterEngineOnVsync` must occur on the thread that |
| /// made the call to `FlutterEngineRun`, the engine will make this callback on |
| /// an internal engine-managed thread. If the components accessed on the |
| /// embedder are not thread safe, the appropriate re-threading must be done. |
| VsyncCallback vsync_callback; |
| |
| /// The name of a custom Dart entrypoint. This is optional and specifying a |
| /// null or empty entrypoint makes the engine look for a method named "main" |
| /// in the root library of the application. |
| /// |
| /// Care must be taken to ensure that the custom entrypoint is not tree-shaken |
| /// away. Usually, this is done using the `@pragma('vm:entry-point')` |
| /// decoration. |
| const char* custom_dart_entrypoint; |
| |
| /// Typically the Flutter engine create and manages its internal threads. This |
| /// optional argument allows for the specification of task runner interfaces |
| /// to event loops managed by the embedder on threads it creates. |
| const FlutterCustomTaskRunners* custom_task_runners; |
| |
| /// All `FlutterEngine` instances in the process share the same Dart VM. When |
| /// the first engine is launched, it starts the Dart VM as well. It used to be |
| /// the case that it was not possible to shutdown the Dart VM cleanly and |
| /// start it back up in the process in a safe manner. This issue has since |
| /// been patched. Unfortunately, applications already began to make use of the |
| /// fact that shutting down the Flutter engine instance left a running VM in |
| /// the process. Since a Flutter engine could be launched on any thread, |
| /// applications would "warm up" the VM on another thread by launching |
| /// an engine with no isolates and then shutting it down immediately. The main |
| /// Flutter application could then be started on the main thread without |
| /// having to incur the Dart VM startup costs at that time. With the new |
| /// behavior, this "optimization" immediately becomes massive performance |
| /// pessimization as the VM would be started up in the "warm up" phase, shut |
| /// down there and then started again on the main thread. Changing this |
| /// behavior was deemed to be an unacceptable breaking change. Embedders that |
| /// wish to shutdown the Dart VM when the last engine is terminated in the |
| /// process should opt into this behavior by setting this flag to true. |
| bool shutdown_dart_vm_when_done; |
| |
| /// Typically, Flutter renders the layer hierarchy into a single root surface. |
| /// However, when embedders need to interleave their own contents within the |
| /// Flutter layer hierarchy, their applications can push platform views within |
| /// the Flutter scene. This is done using the `SceneBuilder.addPlatformView` |
| /// call. When this happens, the Flutter rasterizer divides the effective view |
| /// hierarchy into multiple layers. Each layer gets its own backing store and |
| /// Flutter renders into the same. Once the layers contents have been |
| /// fulfilled, the embedder is asked to composite these layers on-screen. At |
| /// this point, it can interleave its own contents within the effective |
| /// hierarchy. The interface for the specification of these layer backing |
| /// stores and the hooks to listen for the composition of layers on-screen can |
| /// be controlled using this field. This field is completely optional. In its |
| /// absence, platforms views in the scene are ignored and Flutter renders to |
| /// the root surface as normal. |
| const FlutterCompositor* compositor; |
| |
| /// Max size of the old gen heap for the Dart VM in MB, or 0 for unlimited, -1 |
| /// for default value. |
| /// |
| /// See also: |
| /// https://github.com/dart-lang/sdk/blob/ca64509108b3e7219c50d6c52877c85ab6a35ff2/runtime/vm/flag_list.h#L150 |
| int64_t dart_old_gen_heap_size; |
| |
| /// The AOT data to be used in AOT operation. |
| /// |
| /// Embedders should instantiate and destroy this object via the |
| /// FlutterEngineCreateAOTData and FlutterEngineCollectAOTData methods. |
| /// |
| /// Embedders can provide either snapshot buffers or aot_data, but not both. |
| FlutterEngineAOTData aot_data; |
| |
| /// A callback that computes the locale the platform would natively resolve |
| /// to. |
| /// |
| /// The input parameter is an array of FlutterLocales which represent the |
| /// locales supported by the app. One of the input supported locales should |
| /// be selected and returned to best match with the user/device's preferred |
| /// locale. The implementation should produce a result that as closely |
| /// matches what the platform would natively resolve to as possible. |
| FlutterComputePlatformResolvedLocaleCallback |
| compute_platform_resolved_locale_callback; |
| |
| /// The command line argument count for arguments passed through to the Dart |
| /// entrypoint. |
| int dart_entrypoint_argc; |
| |
| /// The command line arguments passed through to the Dart entrypoint. The |
| /// strings must be `NULL` terminated. |
| /// |
| /// The strings will be copied out and so any strings passed in here can |
| /// be safely collected after initializing the engine with |
| /// `FlutterProjectArgs`. |
| const char* const* dart_entrypoint_argv; |
| |
| // Logging callback for Dart application messages. |
| // |
| // This callback is used by embedder to log print messages from the running |
| // Flutter application. This callback is made on an internal engine managed |
| // thread and embedders must re-thread if necessary. Performing blocking calls |
| // in this callback may introduce application jank. |
| FlutterLogMessageCallback log_message_callback; |
| |
| // A tag string associated with application log messages. |
| // |
| // A log message tag string that can be used convey application, subsystem, |
| // or component name to embedder's logger. This string will be passed to to |
| // callbacks on `log_message_callback`. Defaults to "flutter" if unspecified. |
| const char* log_tag; |
| |
| // A callback that is invoked right before the engine is restarted. |
| // |
| // This optional callback is typically used to reset states to as if the |
| // engine has just been started, and usually indicates the user has requested |
| // a hot restart (Shift-R in the Flutter CLI.) It is not called the first time |
| // the engine starts. |
| // |
| // The first argument is the `user_data` from `FlutterEngineInitialize`. |
| OnPreEngineRestartCallback on_pre_engine_restart_callback; |
| |
| /// The callback invoked by the engine in order to give the embedder the |
| /// chance to respond to updates to semantics nodes and custom actions from |
| /// the Dart application. |
| /// |
| /// The callback will be invoked on the thread on which the `FlutterEngineRun` |
| /// call is made. |
| /// |
| /// If this callback is provided, update_semantics_node_callback and |
| /// update_semantics_custom_action_callback must not be provided. |
| FlutterUpdateSemanticsCallback update_semantics_callback; |
| |
| // Data set by platform-specific embedders for use in font initialization. |
| uint32_t font_initialization_data; |
| } FlutterProjectArgs; |
| |
| #ifndef FLUTTER_ENGINE_NO_PROTOTYPES |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Creates the necessary data structures to launch a Flutter Dart |
| /// application in AOT mode. The data may only be collected after |
| /// all FlutterEngine instances launched using this data have been |
| /// terminated. |
| /// |
| /// @param[in] source The source of the AOT data. |
| /// @param[out] data_out The AOT data on success. Unchanged on failure. |
| /// |
| /// @return Returns if the AOT data could be successfully resolved. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineCreateAOTData( |
| const FlutterEngineAOTDataSource* source, |
| FlutterEngineAOTData* data_out); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Collects the AOT data. |
| /// |
| /// @warning The embedder must ensure that this call is made only after all |
| /// FlutterEngine instances launched using this data have been |
| /// terminated, and that all of those instances were launched with |
| /// the FlutterProjectArgs::shutdown_dart_vm_when_done flag set to |
| /// true. |
| /// |
| /// @param[in] data The data to collect. |
| /// |
| /// @return Returns if the AOT data was successfully collected. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineCollectAOTData(FlutterEngineAOTData data); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Initialize and run a Flutter engine instance and return a handle |
| /// to it. This is a convenience method for the pair of calls to |
| /// `FlutterEngineInitialize` and `FlutterEngineRunInitialized`. |
| /// |
| /// @note This method of running a Flutter engine works well except in |
| /// cases where the embedder specifies custom task runners via |
| /// `FlutterProjectArgs::custom_task_runners`. In such cases, the |
| /// engine may need the embedder to post tasks back to it before |
| /// `FlutterEngineRun` has returned. Embedders can only post tasks |
| /// to the engine if they have a handle to the engine. In such |
| /// cases, embedders are advised to get the engine handle via the |
| /// `FlutterInitializeCall`. Then they can call |
| /// `FlutterEngineRunInitialized` knowing that they will be able to |
| /// service custom tasks on other threads with the engine handle. |
| /// |
| /// @param[in] version The Flutter embedder API version. Must be |
| /// FLUTTER_ENGINE_VERSION. |
| /// @param[in] config The renderer configuration. |
| /// @param[in] args The Flutter project arguments. |
| /// @param user_data A user data baton passed back to embedders in |
| /// callbacks. |
| /// @param[out] engine_out The engine handle on successful engine creation. |
| /// |
| /// @return The result of the call to run the Flutter engine. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineRun(size_t version, |
| const FlutterRendererConfig* config, |
| const FlutterProjectArgs* args, |
| void* user_data, |
| FLUTTER_API_SYMBOL(FlutterEngine) * |
| engine_out); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Shuts down a Flutter engine instance. The engine handle is no |
| /// longer valid for any calls in the embedder API after this point. |
| /// Making additional calls with this handle is undefined behavior. |
| /// |
| /// @note This de-initializes the Flutter engine instance (via an implicit |
| /// call to `FlutterEngineDeinitialize`) if necessary. |
| /// |
| /// @param[in] engine The Flutter engine instance to collect. |
| /// |
| /// @return The result of the call to shutdown the Flutter engine instance. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineShutdown(FLUTTER_API_SYMBOL(FlutterEngine) |
| engine); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Initialize a Flutter engine instance. This does not run the |
| /// Flutter application code till the `FlutterEngineRunInitialized` |
| /// call is made. Besides Flutter application code, no tasks are |
| /// scheduled on embedder managed task runners either. This allows |
| /// embedders providing custom task runners to the Flutter engine to |
| /// obtain a handle to the Flutter engine before the engine can post |
| /// tasks on these task runners. |
| /// |
| /// @param[in] version The Flutter embedder API version. Must be |
| /// FLUTTER_ENGINE_VERSION. |
| /// @param[in] config The renderer configuration. |
| /// @param[in] args The Flutter project arguments. |
| /// @param user_data A user data baton passed back to embedders in |
| /// callbacks. |
| /// @param[out] engine_out The engine handle on successful engine creation. |
| /// |
| /// @return The result of the call to initialize the Flutter engine. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineInitialize(size_t version, |
| const FlutterRendererConfig* config, |
| const FlutterProjectArgs* args, |
| void* user_data, |
| FLUTTER_API_SYMBOL(FlutterEngine) * |
| engine_out); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Stops running the Flutter engine instance. After this call, the |
| /// embedder is also guaranteed that no more calls to post tasks |
| /// onto custom task runners specified by the embedder are made. The |
| /// Flutter engine handle still needs to be collected via a call to |
| /// `FlutterEngineShutdown`. |
| /// |
| /// @param[in] engine The running engine instance to de-initialize. |
| /// |
| /// @return The result of the call to de-initialize the Flutter engine. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineDeinitialize(FLUTTER_API_SYMBOL(FlutterEngine) |
| engine); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Runs an initialized engine instance. An engine can be |
| /// initialized via `FlutterEngineInitialize`. An initialized |
| /// instance can only be run once. During and after this call, |
| /// custom task runners supplied by the embedder are expected to |
| /// start servicing tasks. |
| /// |
| /// @param[in] engine An initialized engine instance that has not previously |
| /// been run. |
| /// |
| /// @return The result of the call to run the initialized Flutter |
| /// engine instance. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineRunInitialized( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine); |
| |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineSendWindowMetricsEvent( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| const FlutterWindowMetricsEvent* event); |
| |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineSendPointerEvent( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| const FlutterPointerEvent* events, |
| size_t events_count); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Sends a key event to the engine. The framework will decide |
| /// whether to handle this event in a synchronous fashion, although |
| /// due to technical limitation, the result is always reported |
| /// asynchronously. The `callback` is guaranteed to be called |
| /// exactly once. |
| /// |
| /// @param[in] engine A running engine instance. |
| /// @param[in] event The event data to be sent. This function will no |
| /// longer access `event` after returning. |
| /// @param[in] callback The callback invoked by the engine when the |
| /// Flutter application has decided whether it |
| /// handles this event. Accepts nullptr. |
| /// @param[in] user_data The context associated with the callback. The |
| /// exact same value will used to invoke `callback`. |
| /// Accepts nullptr. |
| /// |
| /// @return The result of the call. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineSendKeyEvent(FLUTTER_API_SYMBOL(FlutterEngine) |
| engine, |
| const FlutterKeyEvent* event, |
| FlutterKeyEventCallback callback, |
| void* user_data); |
| |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineSendPlatformMessage( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| const FlutterPlatformMessage* message); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Creates a platform message response handle that allows the |
| /// embedder to set a native callback for a response to a message. |
| /// This handle may be set on the `response_handle` field of any |
| /// `FlutterPlatformMessage` sent to the engine. |
| /// |
| /// The handle must be collected via a call to |
| /// `FlutterPlatformMessageReleaseResponseHandle`. This may be done |
| /// immediately after a call to `FlutterEngineSendPlatformMessage` |
| /// with a platform message whose response handle contains the handle |
| /// created using this call. In case a handle is created but never |
| /// sent in a message, the release call must still be made. Not |
| /// calling release on the handle results in a small memory leak. |
| /// |
| /// The user data baton passed to the data callback is the one |
| /// specified in this call as the third argument. |
| /// |
| /// @see FlutterPlatformMessageReleaseResponseHandle() |
| /// |
| /// @param[in] engine A running engine instance. |
| /// @param[in] data_callback The callback invoked by the engine when the |
| /// Flutter application send a response on the |
| /// handle. |
| /// @param[in] user_data The user data associated with the data callback. |
| /// @param[out] response_out The response handle created when this call is |
| /// successful. |
| /// |
| /// @return The result of the call. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterPlatformMessageCreateResponseHandle( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| FlutterDataCallback data_callback, |
| void* user_data, |
| FlutterPlatformMessageResponseHandle** response_out); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Collects the handle created using |
| /// `FlutterPlatformMessageCreateResponseHandle`. |
| /// |
| /// @see FlutterPlatformMessageCreateResponseHandle() |
| /// |
| /// @param[in] engine A running engine instance. |
| /// @param[in] response The platform message response handle to collect. |
| /// These handles are created using |
| /// `FlutterPlatformMessageCreateResponseHandle()`. |
| /// |
| /// @return The result of the call. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterPlatformMessageReleaseResponseHandle( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| FlutterPlatformMessageResponseHandle* response); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Send a response from the native side to a platform message from |
| /// the Dart Flutter application. |
| /// |
| /// @param[in] engine The running engine instance. |
| /// @param[in] handle The platform message response handle. |
| /// @param[in] data The data to associate with the platform message |
| /// response. |
| /// @param[in] data_length The length of the platform message response data. |
| /// |
| /// @return The result of the call. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineSendPlatformMessageResponse( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| const FlutterPlatformMessageResponseHandle* handle, |
| const uint8_t* data, |
| size_t data_length); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief This API is only meant to be used by platforms that need to |
| /// flush tasks on a message loop not controlled by the Flutter |
| /// engine. |
| /// |
| /// @deprecated This API will be deprecated and is not part of the stable API. |
| /// Please use the custom task runners API by setting an |
| /// appropriate `FlutterProjectArgs::custom_task_runners` |
| /// interface. This will yield better performance and the |
| /// interface is stable. |
| /// |
| /// @return The result of the call. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult __FlutterEngineFlushPendingTasksNow(); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Register an external texture with a unique (per engine) |
| /// identifier. Only rendering backends that support external |
| /// textures accept external texture registrations. After the |
| /// external texture is registered, the application can mark that a |
| /// frame is available by calling |
| /// `FlutterEngineMarkExternalTextureFrameAvailable`. |
| /// |
| /// @see FlutterEngineUnregisterExternalTexture() |
| /// @see FlutterEngineMarkExternalTextureFrameAvailable() |
| /// |
| /// @param[in] engine A running engine instance. |
| /// @param[in] texture_identifier The identifier of the texture to register |
| /// with the engine. The embedder may supply new |
| /// frames to this texture using the same |
| /// identifier. |
| /// |
| /// @return The result of the call. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineRegisterExternalTexture( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| int64_t texture_identifier); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Unregister a previous texture registration. |
| /// |
| /// @see FlutterEngineRegisterExternalTexture() |
| /// @see FlutterEngineMarkExternalTextureFrameAvailable() |
| /// |
| /// @param[in] engine A running engine instance. |
| /// @param[in] texture_identifier The identifier of the texture for which new |
| /// frame will not be available. |
| /// |
| /// @return The result of the call. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineUnregisterExternalTexture( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| int64_t texture_identifier); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Mark that a new texture frame is available for a given texture |
| /// identifier. |
| /// |
| /// @see FlutterEngineRegisterExternalTexture() |
| /// @see FlutterEngineUnregisterExternalTexture() |
| /// |
| /// @param[in] engine A running engine instance. |
| /// @param[in] texture_identifier The identifier of the texture whose frame |
| /// has been updated. |
| /// |
| /// @return The result of the call. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineMarkExternalTextureFrameAvailable( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| int64_t texture_identifier); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Enable or disable accessibility semantics. |
| /// |
| /// @param[in] engine A running engine instance. |
| /// @param[in] enabled When enabled, changes to the semantic contents of the |
| /// window are sent via the |
| /// `FlutterUpdateSemanticsCallback` registered to |
| /// `update_semantics_callback` in |
| /// `FlutterProjectArgs`. |
| /// |
| /// @return The result of the call. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineUpdateSemanticsEnabled( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| bool enabled); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Sets additional accessibility features. |
| /// |
| /// @param[in] engine A running engine instance |
| /// @param[in] features The accessibility features to set. |
| /// |
| /// @return The result of the call. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineUpdateAccessibilityFeatures( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| FlutterAccessibilityFeature features); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Dispatch a semantics action to the specified semantics node. |
| /// |
| /// @param[in] engine A running engine instance. |
| /// @param[in] identifier The semantics action identifier. |
| /// @param[in] action The semantics action. |
| /// @param[in] data Data associated with the action. |
| /// @param[in] data_length The data length. |
| /// |
| /// @return The result of the call. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineDispatchSemanticsAction( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| uint64_t id, |
| FlutterSemanticsAction action, |
| const uint8_t* data, |
| size_t data_length); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Notify the engine that a vsync event occurred. A baton passed to |
| /// the platform via the vsync callback must be returned. This call |
| /// must be made on the thread on which the call to |
| /// `FlutterEngineRun` was made. |
| /// |
| /// @see FlutterEngineGetCurrentTime() |
| /// |
| /// @attention That frame timepoints are in nanoseconds. |
| /// |
| /// @attention The system monotonic clock is used as the timebase. |
| /// |
| /// @param[in] engine. A running engine instance. |
| /// @param[in] baton The baton supplied by the engine. |
| /// @param[in] frame_start_time_nanos The point at which the vsync event |
| /// occurred or will occur. If the time |
| /// point is in the future, the engine will |
| /// wait till that point to begin its frame |
| /// workload. |
| /// @param[in] frame_target_time_nanos The point at which the embedder |
| /// anticipates the next vsync to occur. |
| /// This is a hint the engine uses to |
| /// schedule Dart VM garbage collection in |
| /// periods in which the various threads |
| /// are most likely to be idle. For |
| /// example, for a 60Hz display, embedders |
| /// should add 16.6 * 1e6 to the frame time |
| /// field. |
| /// |
| /// @return The result of the call. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineOnVsync(FLUTTER_API_SYMBOL(FlutterEngine) |
| engine, |
| intptr_t baton, |
| uint64_t frame_start_time_nanos, |
| uint64_t frame_target_time_nanos); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Reloads the system fonts in engine. |
| /// |
| /// @param[in] engine. A running engine instance. |
| /// |
| /// @return The result of the call. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineReloadSystemFonts( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief A profiling utility. Logs a trace duration begin event to the |
| /// timeline. If the timeline is unavailable or disabled, this has |
| /// no effect. Must be balanced with an duration end event (via |
| /// `FlutterEngineTraceEventDurationEnd`) with the same name on the |
| /// same thread. Can be called on any thread. Strings passed into |
| /// the function will NOT be copied when added to the timeline. Only |
| /// string literals may be passed in. |
| /// |
| /// @param[in] name The name of the trace event. |
| /// |
| FLUTTER_EXPORT |
| void FlutterEngineTraceEventDurationBegin(const char* name); |
| |
| //----------------------------------------------------------------------------- |
| /// @brief A profiling utility. Logs a trace duration end event to the |
| /// timeline. If the timeline is unavailable or disabled, this has |
| /// no effect. This call must be preceded by a trace duration begin |
| /// call (via `FlutterEngineTraceEventDurationBegin`) with the same |
| /// name on the same thread. Can be called on any thread. Strings |
| /// passed into the function will NOT be copied when added to the |
| /// timeline. Only string literals may be passed in. |
| /// |
| /// @param[in] name The name of the trace event. |
| /// |
| FLUTTER_EXPORT |
| void FlutterEngineTraceEventDurationEnd(const char* name); |
| |
| //----------------------------------------------------------------------------- |
| /// @brief A profiling utility. Logs a trace duration instant event to the |
| /// timeline. If the timeline is unavailable or disabled, this has |
| /// no effect. Can be called on any thread. Strings passed into the |
| /// function will NOT be copied when added to the timeline. Only |
| /// string literals may be passed in. |
| /// |
| /// @param[in] name The name of the trace event. |
| /// |
| FLUTTER_EXPORT |
| void FlutterEngineTraceEventInstant(const char* name); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Posts a task onto the Flutter render thread. Typically, this may |
| /// be called from any thread as long as a `FlutterEngineShutdown` |
| /// on the specific engine has not already been initiated. |
| /// |
| /// @param[in] engine A running engine instance. |
| /// @param[in] callback The callback to execute on the render thread. |
| /// @param callback_data The callback context. |
| /// |
| /// @return The result of the call. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEnginePostRenderThreadTask( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| VoidCallback callback, |
| void* callback_data); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Get the current time in nanoseconds from the clock used by the |
| /// flutter engine. This is the system monotonic clock. |
| /// |
| /// @return The current time in nanoseconds. |
| /// |
| FLUTTER_EXPORT |
| uint64_t FlutterEngineGetCurrentTime(); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Inform the engine to run the specified task. This task has been |
| /// given to the engine via the |
| /// `FlutterTaskRunnerDescription.post_task_callback`. This call |
| /// must only be made at the target time specified in that callback. |
| /// Running the task before that time is undefined behavior. |
| /// |
| /// @param[in] engine A running engine instance. |
| /// @param[in] task the task handle. |
| /// |
| /// @return The result of the call. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineRunTask(FLUTTER_API_SYMBOL(FlutterEngine) |
| engine, |
| const FlutterTask* task); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Notify a running engine instance that the locale has been |
| /// updated. The preferred locale must be the first item in the list |
| /// of locales supplied. The other entries will be used as a |
| /// fallback. |
| /// |
| /// @param[in] engine A running engine instance. |
| /// @param[in] locales The updated locales in the order of preference. |
| /// @param[in] locales_count The count of locales supplied. |
| /// |
| /// @return Whether the locale updates were applied. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineUpdateLocales(FLUTTER_API_SYMBOL(FlutterEngine) |
| engine, |
| const FlutterLocale** locales, |
| size_t locales_count); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Returns if the Flutter engine instance will run AOT compiled |
| /// Dart code. This call has no threading restrictions. |
| /// |
| /// For embedder code that is configured for both AOT and JIT mode |
| /// Dart execution based on the Flutter engine being linked to, this |
| /// runtime check may be used to appropriately configure the |
| /// `FlutterProjectArgs`. In JIT mode execution, the kernel |
| /// snapshots must be present in the Flutter assets directory |
| /// specified in the `FlutterProjectArgs`. For AOT execution, the |
| /// fields `vm_snapshot_data`, `vm_snapshot_instructions`, |
| /// `isolate_snapshot_data` and `isolate_snapshot_instructions` |
| /// (along with their size fields) must be specified in |
| /// `FlutterProjectArgs`. |
| /// |
| /// @return True, if AOT Dart code is run. JIT otherwise. |
| /// |
| FLUTTER_EXPORT |
| bool FlutterEngineRunsAOTCompiledDartCode(void); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Posts a Dart object to specified send port. The corresponding |
| /// receive port for send port can be in any isolate running in the |
| /// VM. This isolate can also be the root isolate for an |
| /// unrelated engine. The engine parameter is necessary only to |
| /// ensure the call is not made when no engine (and hence no VM) is |
| /// running. |
| /// |
| /// Unlike the platform messages mechanism, there are no threading |
| /// restrictions when using this API. Message can be posted on any |
| /// thread and they will be made available to isolate on which the |
| /// corresponding send port is listening. |
| /// |
| /// However, it is the embedders responsibility to ensure that the |
| /// call is not made during an ongoing call the |
| /// `FlutterEngineDeinitialize` or `FlutterEngineShutdown` on |
| /// another thread. |
| /// |
| /// @param[in] engine A running engine instance. |
| /// @param[in] port The send port to send the object to. |
| /// @param[in] object The object to send to the isolate with the |
| /// corresponding receive port. |
| /// |
| /// @return If the message was posted to the send port. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEnginePostDartObject( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| FlutterEngineDartPort port, |
| const FlutterEngineDartObject* object); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Posts a low memory notification to a running engine instance. |
| /// The engine will do its best to release non-critical resources in |
| /// response. It is not guaranteed that the resource would have been |
| /// collected by the time this call returns however. The |
| /// notification is posted to engine subsystems that may be |
| /// operating on other threads. |
| /// |
| /// Flutter applications can respond to these notifications by |
| /// setting `WidgetsBindingObserver.didHaveMemoryPressure` |
| /// observers. |
| /// |
| /// @param[in] engine A running engine instance. |
| /// |
| /// @return If the low memory notification was sent to the running engine |
| /// instance. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineNotifyLowMemoryWarning( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Schedule a callback to be run on all engine managed threads. |
| /// The engine will attempt to service this callback the next time |
| /// the message loop for each managed thread is idle. Since the |
| /// engine manages the entire lifecycle of multiple threads, there |
| /// is no opportunity for the embedders to finely tune the |
| /// priorities of threads directly, or, perform other thread |
| /// specific configuration (for example, setting thread names for |
| /// tracing). This callback gives embedders a chance to affect such |
| /// tuning. |
| /// |
| /// @attention This call is expensive and must be made as few times as |
| /// possible. The callback must also return immediately as not doing |
| /// so may risk performance issues (especially for callbacks of type |
| /// kFlutterNativeThreadTypeUI and kFlutterNativeThreadTypeRender). |
| /// |
| /// @attention Some callbacks (especially the ones of type |
| /// kFlutterNativeThreadTypeWorker) may be called after the |
| /// FlutterEngine instance has shut down. Embedders must be careful |
| /// in handling the lifecycle of objects associated with the user |
| /// data baton. |
| /// |
| /// @attention In case there are multiple running Flutter engine instances, |
| /// their workers are shared. |
| /// |
| /// @param[in] engine A running engine instance. |
| /// @param[in] callback The callback that will get called multiple times on |
| /// each engine managed thread. |
| /// @param[in] user_data A baton passed by the engine to the callback. This |
| /// baton is not interpreted by the engine in any way. |
| /// |
| /// @return Returns if the callback was successfully posted to all threads. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEnginePostCallbackOnAllNativeThreads( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| FlutterNativeThreadCallback callback, |
| void* user_data); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Posts updates corresponding to display changes to a running engine |
| /// instance. |
| /// |
| /// @param[in] update_type The type of update pushed to the engine. |
| /// @param[in] displays The displays affected by this update. |
| /// @param[in] display_count Size of the displays array, must be at least 1. |
| /// |
| /// @return the result of the call made to the engine. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineNotifyDisplayUpdate( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| FlutterEngineDisplaysUpdateType update_type, |
| const FlutterEngineDisplay* displays, |
| size_t display_count); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Schedule a new frame to redraw the content. |
| /// |
| /// @param[in] engine A running engine instance. |
| /// |
| /// @return the result of the call made to the engine. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineScheduleFrame(FLUTTER_API_SYMBOL(FlutterEngine) |
| engine); |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Schedule a callback to be called after the next frame is drawn. |
| /// This must be called from the platform thread. The callback is |
| /// executed only once from the raster thread; embedders must |
| /// re-thread if necessary. Performing blocking calls |
| /// in this callback may introduce application jank. |
| /// |
| /// @param[in] engine A running engine instance. |
| /// @param[in] callback The callback to execute. |
| /// @param[in] user_data A baton passed by the engine to the callback. This |
| /// baton is not interpreted by the engine in any way. |
| /// |
| /// @return The result of the call. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineSetNextFrameCallback( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| VoidCallback callback, |
| void* user_data); |
| |
| // Temporary hack |
| FLUTTER_EXPORT |
| void FlutterEngineRunMessageLoop(); |
| |
| #endif // !FLUTTER_ENGINE_NO_PROTOTYPES |
| |
| // Typedefs for the function pointers in FlutterEngineProcTable. |
| typedef FlutterEngineResult (*FlutterEngineCreateAOTDataFnPtr)( |
| const FlutterEngineAOTDataSource* source, |
| FlutterEngineAOTData* data_out); |
| typedef FlutterEngineResult (*FlutterEngineCollectAOTDataFnPtr)( |
| FlutterEngineAOTData data); |
| typedef FlutterEngineResult (*FlutterEngineRunFnPtr)( |
| size_t version, |
| const FlutterRendererConfig* config, |
| const FlutterProjectArgs* args, |
| void* user_data, |
| FLUTTER_API_SYMBOL(FlutterEngine) * engine_out); |
| typedef FlutterEngineResult (*FlutterEngineShutdownFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine); |
| typedef FlutterEngineResult (*FlutterEngineInitializeFnPtr)( |
| size_t version, |
| const FlutterRendererConfig* config, |
| const FlutterProjectArgs* args, |
| void* user_data, |
| FLUTTER_API_SYMBOL(FlutterEngine) * engine_out); |
| typedef FlutterEngineResult (*FlutterEngineDeinitializeFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine); |
| typedef FlutterEngineResult (*FlutterEngineRunInitializedFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine); |
| typedef FlutterEngineResult (*FlutterEngineSendWindowMetricsEventFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| const FlutterWindowMetricsEvent* event); |
| typedef FlutterEngineResult (*FlutterEngineSendPointerEventFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| const FlutterPointerEvent* events, |
| size_t events_count); |
| typedef FlutterEngineResult (*FlutterEngineSendKeyEventFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| const FlutterKeyEvent* event, |
| FlutterKeyEventCallback callback, |
| void* user_data); |
| typedef FlutterEngineResult (*FlutterEngineSendPlatformMessageFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| const FlutterPlatformMessage* message); |
| typedef FlutterEngineResult ( |
| *FlutterEnginePlatformMessageCreateResponseHandleFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| FlutterDataCallback data_callback, |
| void* user_data, |
| FlutterPlatformMessageResponseHandle** response_out); |
| typedef FlutterEngineResult ( |
| *FlutterEnginePlatformMessageReleaseResponseHandleFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| FlutterPlatformMessageResponseHandle* response); |
| typedef FlutterEngineResult (*FlutterEngineSendPlatformMessageResponseFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| const FlutterPlatformMessageResponseHandle* handle, |
| const uint8_t* data, |
| size_t data_length); |
| typedef FlutterEngineResult (*FlutterEngineRegisterExternalTextureFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| int64_t texture_identifier); |
| typedef FlutterEngineResult (*FlutterEngineUnregisterExternalTextureFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| int64_t texture_identifier); |
| typedef FlutterEngineResult ( |
| *FlutterEngineMarkExternalTextureFrameAvailableFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| int64_t texture_identifier); |
| typedef FlutterEngineResult (*FlutterEngineUpdateSemanticsEnabledFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| bool enabled); |
| typedef FlutterEngineResult (*FlutterEngineUpdateAccessibilityFeaturesFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| FlutterAccessibilityFeature features); |
| typedef FlutterEngineResult (*FlutterEngineDispatchSemanticsActionFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| uint64_t id, |
| FlutterSemanticsAction action, |
| const uint8_t* data, |
| size_t data_length); |
| typedef FlutterEngineResult (*FlutterEngineOnVsyncFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| intptr_t baton, |
| uint64_t frame_start_time_nanos, |
| uint64_t frame_target_time_nanos); |
| typedef FlutterEngineResult (*FlutterEngineReloadSystemFontsFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine); |
| typedef void (*FlutterEngineTraceEventDurationBeginFnPtr)(const char* name); |
| typedef void (*FlutterEngineTraceEventDurationEndFnPtr)(const char* name); |
| typedef void (*FlutterEngineTraceEventInstantFnPtr)(const char* name); |
| typedef FlutterEngineResult (*FlutterEnginePostRenderThreadTaskFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| VoidCallback callback, |
| void* callback_data); |
| typedef uint64_t (*FlutterEngineGetCurrentTimeFnPtr)(); |
| typedef FlutterEngineResult (*FlutterEngineRunTaskFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| const FlutterTask* task); |
| typedef FlutterEngineResult (*FlutterEngineUpdateLocalesFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| const FlutterLocale** locales, |
| size_t locales_count); |
| typedef bool (*FlutterEngineRunsAOTCompiledDartCodeFnPtr)(void); |
| typedef FlutterEngineResult (*FlutterEnginePostDartObjectFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| FlutterEngineDartPort port, |
| const FlutterEngineDartObject* object); |
| typedef FlutterEngineResult (*FlutterEngineNotifyLowMemoryWarningFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine); |
| typedef FlutterEngineResult (*FlutterEnginePostCallbackOnAllNativeThreadsFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| FlutterNativeThreadCallback callback, |
| void* user_data); |
| typedef FlutterEngineResult (*FlutterEngineNotifyDisplayUpdateFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| FlutterEngineDisplaysUpdateType update_type, |
| const FlutterEngineDisplay* displays, |
| size_t display_count); |
| typedef FlutterEngineResult (*FlutterEngineScheduleFrameFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine); |
| typedef FlutterEngineResult (*FlutterEngineSetNextFrameCallbackFnPtr)( |
| FLUTTER_API_SYMBOL(FlutterEngine) engine, |
| VoidCallback callback, |
| void* user_data); |
| typedef void (*FlutterEngineRunMessageLoopCallbackFnPtr)(); |
| |
| /// Function-pointer-based versions of the APIs above. |
| typedef struct { |
| /// The size of this struct. Must be sizeof(FlutterEngineProcs). |
| size_t struct_size; |
| |
| FlutterEngineCreateAOTDataFnPtr CreateAOTData; |
| FlutterEngineCollectAOTDataFnPtr CollectAOTData; |
| FlutterEngineRunFnPtr Run; |
| FlutterEngineShutdownFnPtr Shutdown; |
| FlutterEngineInitializeFnPtr Initialize; |
| FlutterEngineDeinitializeFnPtr Deinitialize; |
| FlutterEngineRunInitializedFnPtr RunInitialized; |
| FlutterEngineSendWindowMetricsEventFnPtr SendWindowMetricsEvent; |
| FlutterEngineSendPointerEventFnPtr SendPointerEvent; |
| FlutterEngineSendKeyEventFnPtr SendKeyEvent; |
| FlutterEngineSendPlatformMessageFnPtr SendPlatformMessage; |
| FlutterEnginePlatformMessageCreateResponseHandleFnPtr |
| PlatformMessageCreateResponseHandle; |
| FlutterEnginePlatformMessageReleaseResponseHandleFnPtr |
| PlatformMessageReleaseResponseHandle; |
| FlutterEngineSendPlatformMessageResponseFnPtr SendPlatformMessageResponse; |
| FlutterEngineRegisterExternalTextureFnPtr RegisterExternalTexture; |
| FlutterEngineUnregisterExternalTextureFnPtr UnregisterExternalTexture; |
| FlutterEngineMarkExternalTextureFrameAvailableFnPtr |
| MarkExternalTextureFrameAvailable; |
| FlutterEngineUpdateSemanticsEnabledFnPtr UpdateSemanticsEnabled; |
| FlutterEngineUpdateAccessibilityFeaturesFnPtr UpdateAccessibilityFeatures; |
| FlutterEngineDispatchSemanticsActionFnPtr DispatchSemanticsAction; |
| FlutterEngineOnVsyncFnPtr OnVsync; |
| FlutterEngineReloadSystemFontsFnPtr ReloadSystemFonts; |
| FlutterEngineTraceEventDurationBeginFnPtr TraceEventDurationBegin; |
| FlutterEngineTraceEventDurationEndFnPtr TraceEventDurationEnd; |
| FlutterEngineTraceEventInstantFnPtr TraceEventInstant; |
| FlutterEnginePostRenderThreadTaskFnPtr PostRenderThreadTask; |
| FlutterEngineGetCurrentTimeFnPtr GetCurrentTime; |
| FlutterEngineRunTaskFnPtr RunTask; |
| FlutterEngineUpdateLocalesFnPtr UpdateLocales; |
| FlutterEngineRunsAOTCompiledDartCodeFnPtr RunsAOTCompiledDartCode; |
| FlutterEnginePostDartObjectFnPtr PostDartObject; |
| FlutterEngineNotifyLowMemoryWarningFnPtr NotifyLowMemoryWarning; |
| FlutterEnginePostCallbackOnAllNativeThreadsFnPtr |
| PostCallbackOnAllNativeThreads; |
| FlutterEngineNotifyDisplayUpdateFnPtr NotifyDisplayUpdate; |
| FlutterEngineScheduleFrameFnPtr ScheduleFrame; |
| FlutterEngineSetNextFrameCallbackFnPtr SetNextFrameCallback; |
| FlutterEngineRunMessageLoopCallbackFnPtr RunMessageLoopCallback; |
| } FlutterEngineProcTable; |
| |
| //------------------------------------------------------------------------------ |
| /// @brief Gets the table of engine function pointers. |
| /// |
| /// @param[out] table The table to fill with pointers. This should be |
| /// zero-initialized, except for struct_size. |
| /// |
| /// @return Returns whether the table was successfully populated. |
| /// |
| FLUTTER_EXPORT |
| FlutterEngineResult FlutterEngineGetProcAddresses( |
| FlutterEngineProcTable* table); |
| |
| #if defined(__cplusplus) |
| } // extern "C" |
| #endif |
| |
| #endif // FLUTTER_EMBEDDER_H_ |