| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org> |
| |
| This software is provided 'as-is', without any express or implied |
| warranty. In no event will the authors be held liable for any damages |
| arising from the use of this software. |
| |
| Permission is granted to anyone to use this software for any purpose, |
| including commercial applications, and to alter it and redistribute it |
| freely, subject to the following restrictions: |
| |
| 1. The origin of this software must not be misrepresented; you must not |
| claim that you wrote the original software. If you use this software |
| in a product, an acknowledgment in the product documentation would be |
| appreciated but is not required. |
| 2. Altered source versions must be plainly marked as such, and must not be |
| misrepresented as being the original software. |
| 3. This notice may not be removed or altered from any source distribution. |
| */ |
| |
| |
| #include "../../SDL_internal.h" |
| |
| #if SDL_VIDEO_DRIVER_EMSCRIPTEN |
| |
| #include <emscripten/emscripten.h> |
| #include <emscripten/html5.h> |
| |
| #include "SDL_emscriptenmouse.h" |
| |
| #include "../../events/SDL_mouse_c.h" |
| #include "SDL_assert.h" |
| |
| |
| static SDL_Cursor* |
| Emscripten_CreateDefaultCursor() |
| { |
| SDL_Cursor* cursor; |
| Emscripten_CursorData *curdata; |
| |
| cursor = SDL_calloc(1, sizeof(SDL_Cursor)); |
| if (cursor) { |
| curdata = (Emscripten_CursorData *) SDL_calloc(1, sizeof(*curdata)); |
| if (!curdata) { |
| SDL_OutOfMemory(); |
| SDL_free(cursor); |
| return NULL; |
| } |
| |
| curdata->system_cursor = "default"; |
| cursor->driverdata = curdata; |
| } |
| else { |
| SDL_OutOfMemory(); |
| } |
| |
| return cursor; |
| } |
| |
| static SDL_Cursor* |
| Emscripten_CreateCursor(SDL_Surface* sruface, int hot_x, int hot_y) |
| { |
| return Emscripten_CreateDefaultCursor(); |
| } |
| |
| static SDL_Cursor* |
| Emscripten_CreateSystemCursor(SDL_SystemCursor id) |
| { |
| SDL_Cursor *cursor; |
| Emscripten_CursorData *curdata; |
| const char *cursor_name = NULL; |
| |
| switch(id) { |
| case SDL_SYSTEM_CURSOR_ARROW: |
| cursor_name = "default"; |
| break; |
| case SDL_SYSTEM_CURSOR_IBEAM: |
| cursor_name = "text"; |
| break; |
| case SDL_SYSTEM_CURSOR_WAIT: |
| cursor_name = "wait"; |
| break; |
| case SDL_SYSTEM_CURSOR_CROSSHAIR: |
| cursor_name = "crosshair"; |
| break; |
| case SDL_SYSTEM_CURSOR_WAITARROW: |
| cursor_name = "progress"; |
| break; |
| case SDL_SYSTEM_CURSOR_SIZENWSE: |
| cursor_name = "nwse-resize"; |
| break; |
| case SDL_SYSTEM_CURSOR_SIZENESW: |
| cursor_name = "nesw-resize"; |
| break; |
| case SDL_SYSTEM_CURSOR_SIZEWE: |
| cursor_name = "ew-resize"; |
| break; |
| case SDL_SYSTEM_CURSOR_SIZENS: |
| cursor_name = "ns-resize"; |
| break; |
| case SDL_SYSTEM_CURSOR_SIZEALL: |
| break; |
| case SDL_SYSTEM_CURSOR_NO: |
| cursor_name = "not-allowed"; |
| break; |
| case SDL_SYSTEM_CURSOR_HAND: |
| cursor_name = "pointer"; |
| break; |
| default: |
| SDL_assert(0); |
| return NULL; |
| } |
| |
| cursor = (SDL_Cursor *) SDL_calloc(1, sizeof(*cursor)); |
| if (!cursor) { |
| SDL_OutOfMemory(); |
| return NULL; |
| } |
| curdata = (Emscripten_CursorData *) SDL_calloc(1, sizeof(*curdata)); |
| if (!curdata) { |
| SDL_OutOfMemory(); |
| SDL_free(cursor); |
| return NULL; |
| } |
| |
| curdata->system_cursor = cursor_name; |
| cursor->driverdata = curdata; |
| |
| return cursor; |
| } |
| |
| static void |
| Emscripten_FreeCursor(SDL_Cursor* cursor) |
| { |
| Emscripten_CursorData *curdata; |
| if (cursor) { |
| curdata = (Emscripten_CursorData *) cursor->driverdata; |
| |
| if (curdata != NULL) { |
| SDL_free(cursor->driverdata); |
| } |
| |
| SDL_free(cursor); |
| } |
| } |
| |
| static int |
| Emscripten_ShowCursor(SDL_Cursor* cursor) |
| { |
| Emscripten_CursorData *curdata; |
| if (SDL_GetMouseFocus() != NULL) { |
| if(cursor && cursor->driverdata) { |
| curdata = (Emscripten_CursorData *) cursor->driverdata; |
| |
| if(curdata->system_cursor) { |
| EM_ASM_INT({ |
| if (Module['canvas']) { |
| Module['canvas'].style['cursor'] = Module['Pointer_stringify']($0); |
| } |
| return 0; |
| }, curdata->system_cursor); |
| } |
| } |
| else { |
| EM_ASM( |
| if (Module['canvas']) { |
| Module['canvas'].style['cursor'] = 'none'; |
| } |
| ); |
| } |
| } |
| return 0; |
| } |
| |
| static void |
| Emscripten_WarpMouse(SDL_Window* window, int x, int y) |
| { |
| SDL_Unsupported(); |
| } |
| |
| static int |
| Emscripten_SetRelativeMouseMode(SDL_bool enabled) |
| { |
| /* TODO: pointer lock isn't actually enabled yet */ |
| if(enabled) { |
| if(emscripten_request_pointerlock(NULL, 1) >= EMSCRIPTEN_RESULT_SUCCESS) { |
| return 0; |
| } |
| } else { |
| if(emscripten_exit_pointerlock() >= EMSCRIPTEN_RESULT_SUCCESS) { |
| return 0; |
| } |
| } |
| return -1; |
| } |
| |
| void |
| Emscripten_InitMouse() |
| { |
| SDL_Mouse* mouse = SDL_GetMouse(); |
| |
| mouse->CreateCursor = Emscripten_CreateCursor; |
| mouse->ShowCursor = Emscripten_ShowCursor; |
| mouse->FreeCursor = Emscripten_FreeCursor; |
| mouse->WarpMouse = Emscripten_WarpMouse; |
| mouse->CreateSystemCursor = Emscripten_CreateSystemCursor; |
| mouse->SetRelativeMouseMode = Emscripten_SetRelativeMouseMode; |
| |
| SDL_SetDefaultCursor(Emscripten_CreateDefaultCursor()); |
| } |
| |
| void |
| Emscripten_FiniMouse() |
| { |
| SDL_Mouse* mouse = SDL_GetMouse(); |
| |
| Emscripten_FreeCursor(mouse->def_cursor); |
| mouse->def_cursor = NULL; |
| |
| mouse->CreateCursor = NULL; |
| mouse->ShowCursor = NULL; |
| mouse->FreeCursor = NULL; |
| mouse->WarpMouse = NULL; |
| mouse->CreateSystemCursor = NULL; |
| mouse->SetRelativeMouseMode = NULL; |
| } |
| |
| #endif /* SDL_VIDEO_DRIVER_EMSCRIPTEN */ |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |
| |