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/* cairo - a vector graphics library with display and print output
*
* Copyright © 2009 Eric Anholt
* Copyright © 2009 Chris Wilson
* Copyright © 2005,2010 Red Hat, Inc
* Copyright © 2011 Linaro Limited
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*
* The Original Code is the cairo graphics library.
*
* The Initial Developer of the Original Code is Red Hat, Inc.
*
* Contributor(s):
* Benjamin Otte <otte@gnome.org>
* Carl Worth <cworth@cworth.org>
* Chris Wilson <chris@chris-wilson.co.uk>
* Eric Anholt <eric@anholt.net>
* T. Zachary Laine <whatwasthataddress@gmail.com>
* Alexandros Frantzis <alexandros.frantzis@linaro.org>
*/
#ifndef CAIRO_GL_PRIVATE_H
#define CAIRO_GL_PRIVATE_H
#define GL_GLEXT_PROTOTYPES
#include "cairoint.h"
#include "cairo-gl.h"
#include "cairo-gl-gradient-private.h"
#include "cairo-device-private.h"
#include "cairo-error-private.h"
#include "cairo-rtree-private.h"
#include "cairo-scaled-font-private.h"
#include "cairo-spans-compositor-private.h"
#include "cairo-array-private.h"
#include <assert.h>
#if CAIRO_HAS_GL_SURFACE
#include <GL/gl.h>
#include <GL/glext.h>
#elif CAIRO_HAS_GLESV2_SURFACE
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#endif
#include "cairo-gl-ext-def-private.h"
#define DEBUG_GL 0
#if DEBUG_GL && __GNUC__
#define UNSUPPORTED(reason) ({ \
fprintf (stderr, \
"cairo-gl: hit unsupported operation in %s(), line %d: %s\n", \
__FUNCTION__, __LINE__, reason); \
CAIRO_INT_STATUS_UNSUPPORTED; \
})
#else
#define UNSUPPORTED(reason) CAIRO_INT_STATUS_UNSUPPORTED
#endif
#define CAIRO_GL_VERSION_ENCODE(major, minor) ( \
((major) * 256) \
+ ((minor) * 1))
/* maximal number of shaders we keep in the cache.
* Random number that is hopefully big enough to not cause many cache evictions. */
#define CAIRO_GL_MAX_SHADERS_PER_CONTEXT 64
/* VBO size that we allocate, smaller size means we gotta flush more often,
* but larger means hogging more memory and can cause trouble for drivers
* (especially on embedded devices). Use the CAIRO_GL_VBO_SIZE environment
* variable to set this to a different size. */
#define CAIRO_GL_VBO_SIZE_DEFAULT (1024*1024)
typedef struct _cairo_gl_surface cairo_gl_surface_t;
/* GL flavor */
typedef enum cairo_gl_flavor {
CAIRO_GL_FLAVOR_NONE = 0,
CAIRO_GL_FLAVOR_DESKTOP = 1,
CAIRO_GL_FLAVOR_ES = 2
} cairo_gl_flavor_t;
/* Indices for vertex attributes used by BindAttribLocation etc */
enum {
CAIRO_GL_VERTEX_ATTRIB_INDEX = 0,
CAIRO_GL_COLOR_ATTRIB_INDEX = 1,
CAIRO_GL_TEXCOORD0_ATTRIB_INDEX = 2,
CAIRO_GL_TEXCOORD1_ATTRIB_INDEX = CAIRO_GL_TEXCOORD0_ATTRIB_INDEX + 1
};
typedef enum cairo_gl_operand_type {
CAIRO_GL_OPERAND_NONE,
CAIRO_GL_OPERAND_CONSTANT,
CAIRO_GL_OPERAND_TEXTURE,
CAIRO_GL_OPERAND_LINEAR_GRADIENT,
CAIRO_GL_OPERAND_RADIAL_GRADIENT_A0,
CAIRO_GL_OPERAND_RADIAL_GRADIENT_NONE,
CAIRO_GL_OPERAND_RADIAL_GRADIENT_EXT,
CAIRO_GL_OPERAND_COUNT
} cairo_gl_operand_type_t;
/* This union structure describes a potential source or mask operand to the
* compositing equation.
*/
typedef struct cairo_gl_operand {
cairo_gl_operand_type_t type;
union {
struct {
GLuint tex;
cairo_gl_surface_t *surface;
cairo_gl_surface_t *owns_surface;
cairo_surface_attributes_t attributes;
int texgen;
} texture;
struct {
GLfloat color[4];
} constant;
struct {
cairo_gl_gradient_t *gradient;
cairo_matrix_t m;
cairo_circle_double_t circle_d;
double radius_0, a;
cairo_extend_t extend;
int texgen;
} gradient;
};
unsigned int vertex_offset;
} cairo_gl_operand_t;
typedef struct cairo_gl_source {
cairo_surface_t base;
cairo_gl_operand_t operand;
} cairo_gl_source_t;
struct _cairo_gl_surface {
cairo_surface_t base;
cairo_gl_operand_t operand;
int width, height;
GLuint tex; /* GL texture object containing our data. */
GLuint fb; /* GL framebuffer object wrapping our data. */
GLuint depth_stencil; /* GL renderbuffer object for holding stencil buffer clip. */
#if CAIRO_HAS_GL_SURFACE
GLuint msaa_rb; /* The ARB MSAA path uses a renderbuffer. */
GLuint msaa_fb;
#endif
GLuint msaa_depth_stencil;
cairo_bool_t stencil_and_msaa_caps_initialized;
cairo_bool_t supports_stencil; /* Stencil support for for non-texture surfaces. */
cairo_bool_t supports_msaa;
cairo_bool_t msaa_active; /* Whether the multisampling
framebuffer is active or not. */
cairo_clip_t *clip_on_stencil_buffer;
int owns_tex;
cairo_bool_t needs_update;
cairo_region_t *clip_region;
};
typedef struct cairo_gl_glyph_cache {
cairo_rtree_t rtree;
cairo_gl_surface_t *surface;
} cairo_gl_glyph_cache_t;
typedef enum cairo_gl_tex {
CAIRO_GL_TEX_SOURCE = 0,
CAIRO_GL_TEX_MASK = 1,
CAIRO_GL_TEX_TEMP = 2
} cairo_gl_tex_t;
typedef struct cairo_gl_shader {
GLuint fragment_shader;
GLuint program;
GLint mvp_location;
GLint constant_location[2];
GLint a_location[2];
GLint circle_d_location[2];
GLint radius_0_location[2];
GLint texdims_location[2];
GLint texgen_location[2];
} cairo_gl_shader_t;
typedef enum cairo_gl_shader_in {
CAIRO_GL_SHADER_IN_NORMAL,
CAIRO_GL_SHADER_IN_CA_SOURCE,
CAIRO_GL_SHADER_IN_CA_SOURCE_ALPHA,
CAIRO_GL_SHADER_IN_COUNT
} cairo_gl_shader_in_t;
typedef enum cairo_gl_var_type {
CAIRO_GL_VAR_NONE,
CAIRO_GL_VAR_TEXCOORDS,
CAIRO_GL_VAR_TEXGEN,
} cairo_gl_var_type_t;
typedef enum cairo_gl_primitive_type {
CAIRO_GL_PRIMITIVE_TYPE_TRIANGLES,
CAIRO_GL_PRIMITIVE_TYPE_TRISTRIPS
} cairo_gl_primitive_type_t;
typedef void (*cairo_gl_emit_rect_t) (cairo_gl_context_t *ctx,
GLfloat x1, GLfloat y1,
GLfloat x2, GLfloat y2);
typedef void (*cairo_gl_emit_span_t) (cairo_gl_context_t *ctx,
GLfloat x1, GLfloat y1,
GLfloat x2, GLfloat y2,
uint8_t alpha);
typedef void (*cairo_gl_emit_glyph_t) (cairo_gl_context_t *ctx,
GLfloat x1, GLfloat y1,
GLfloat x2, GLfloat y2,
GLfloat glyph_x1, GLfloat glyph_y1,
GLfloat glyph_x2, GLfloat glyph_y2);
#define cairo_gl_var_type_hash(src,mask,spans,dest) ((spans) << 5) | ((mask) << 3 | (src << 1) | (dest))
#define CAIRO_GL_VAR_TYPE_MAX (1 << 6)
typedef void (*cairo_gl_generic_func_t)(void);
typedef cairo_gl_generic_func_t (*cairo_gl_get_proc_addr_func_t)(const char *procname);
typedef struct _cairo_gl_dispatch {
/* Buffers */
void (*GenBuffers) (GLsizei n, GLuint *buffers);
void (*BindBuffer) (GLenum target, GLuint buffer);
void (*BufferData) (GLenum target, GLsizeiptr size,
const GLvoid* data, GLenum usage);
GLvoid *(*MapBuffer) (GLenum target, GLenum access);
GLboolean (*UnmapBuffer) (GLenum target);
/* Shaders */
GLuint (*CreateShader) (GLenum type);
void (*ShaderSource) (GLuint shader, GLsizei count,
const GLchar** string, const GLint* length);
void (*CompileShader) (GLuint shader);
void (*GetShaderiv) (GLuint shader, GLenum pname, GLint *params);
void (*GetShaderInfoLog) (GLuint shader, GLsizei bufSize,
GLsizei *length, GLchar *infoLog);
void (*DeleteShader) (GLuint shader);
/* Programs */
GLuint (*CreateProgram) (void);
void (*AttachShader) (GLuint program, GLuint shader);
void (*DeleteProgram) (GLuint program);
void (*LinkProgram) (GLuint program);
void (*UseProgram) (GLuint program);
void (*GetProgramiv) (GLuint program, GLenum pname, GLint *params);
void (*GetProgramInfoLog) (GLuint program, GLsizei bufSize,
GLsizei *length, GLchar *infoLog);
/* Uniforms */
GLint (*GetUniformLocation) (GLuint program, const GLchar* name);
void (*Uniform1f) (GLint location, GLfloat x);
void (*Uniform2f) (GLint location, GLfloat x, GLfloat y);
void (*Uniform3f) (GLint location, GLfloat x, GLfloat y, GLfloat z);
void (*Uniform4f) (GLint location, GLfloat x, GLfloat y, GLfloat z,
GLfloat w);
void (*UniformMatrix3fv) (GLint location, GLsizei count,
GLboolean transpose, const GLfloat *value);
void (*UniformMatrix4fv) (GLint location, GLsizei count,
GLboolean transpose, const GLfloat *value);
void (*Uniform1i) (GLint location, GLint x);
/* Attributes */
void (*BindAttribLocation) (GLuint program, GLuint index,
const GLchar *name);
void (*VertexAttribPointer) (GLuint index, GLint size, GLenum type,
GLboolean normalized, GLsizei stride,
const GLvoid *pointer);
void (*EnableVertexAttribArray) (GLuint index);
void (*DisableVertexAttribArray) (GLuint index);
/* Framebuffer objects */
void (*GenFramebuffers) (GLsizei n, GLuint* framebuffers);
void (*BindFramebuffer) (GLenum target, GLuint framebuffer);
void (*FramebufferTexture2D) (GLenum target, GLenum attachment,
GLenum textarget, GLuint texture,
GLint level);
GLenum (*CheckFramebufferStatus) (GLenum target);
void (*DeleteFramebuffers) (GLsizei n, const GLuint* framebuffers);
void (*GenRenderbuffers) (GLsizei n, GLuint *renderbuffers);
void (*BindRenderbuffer) (GLenum target, GLuint renderbuffer);
void (*RenderbufferStorage) (GLenum target, GLenum internal_format,
GLsizei width, GLsizei height);
void (*FramebufferRenderbuffer) (GLenum target, GLenum attachment,
GLenum renderbuffer_ttarget, GLuint renderbuffer);
void (*DeleteRenderbuffers) (GLsizei n, GLuint *renderbuffers);
void (*BlitFramebuffer) (GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
GLbitfield mask, GLenum filter);
void (*RenderbufferStorageMultisample) (GLenum target, GLsizei samples,
GLenum internalformat,
GLsizei width, GLsizei height);
void (*FramebufferTexture2DMultisample) (GLenum target, GLenum attachment,
GLenum textarget, GLuint texture,
GLint level, GLsizei samples);
} cairo_gl_dispatch_t;
struct _cairo_gl_context {
cairo_device_t base;
const cairo_compositor_t *compositor;
GLuint texture_load_pbo;
GLint max_framebuffer_size;
GLint max_texture_size;
GLint max_textures;
GLenum tex_target;
GLint num_samples;
cairo_bool_t supports_msaa;
char *vb;
cairo_bool_t has_shader_support;
GLuint vertex_shaders[CAIRO_GL_VAR_TYPE_MAX];
cairo_gl_shader_t fill_rectangles_shader;
cairo_cache_t shaders;
cairo_cache_t gradients;
cairo_gl_glyph_cache_t glyph_cache[2];
cairo_list_t fonts;
cairo_gl_surface_t *current_target;
cairo_operator_t current_operator;
cairo_gl_shader_t *pre_shader; /* for component alpha */
cairo_gl_shader_t *current_shader;
cairo_gl_operand_t operands[2];
cairo_bool_t spans;
unsigned int vbo_size;
unsigned int vb_offset;
unsigned int vertex_size;
cairo_region_t *clip_region;
cairo_clip_t *clip;
cairo_gl_primitive_type_t primitive_type;
cairo_array_t tristrip_indices;
cairo_bool_t has_mesa_pack_invert;
cairo_gl_dispatch_t dispatch;
GLfloat modelviewprojection_matrix[16];
cairo_gl_flavor_t gl_flavor;
cairo_bool_t has_map_buffer;
cairo_bool_t has_packed_depth_stencil;
cairo_bool_t has_npot_repeat;
cairo_bool_t can_read_bgra;
cairo_bool_t thread_aware;
void (*acquire) (void *ctx);
void (*release) (void *ctx);
void (*make_current) (void *ctx, cairo_gl_surface_t *surface);
void (*swap_buffers)(void *ctx, cairo_gl_surface_t *surface);
void (*destroy) (void *ctx);
};
typedef struct _cairo_gl_composite {
cairo_gl_surface_t *dst;
cairo_operator_t op;
cairo_region_t *clip_region;
cairo_gl_operand_t src;
cairo_gl_operand_t mask;
cairo_bool_t spans;
cairo_clip_t *clip;
cairo_bool_t multisample;
} cairo_gl_composite_t;
typedef struct _cairo_gl_font {
cairo_scaled_font_private_t base;
cairo_device_t *device;
cairo_list_t link;
} cairo_gl_font_t;
static cairo_always_inline GLenum
_cairo_gl_get_error (void)
{
GLenum err = glGetError();
if (unlikely (err))
while (glGetError ());
return err;
}
static inline cairo_device_t *
_cairo_gl_context_create_in_error (cairo_status_t status)
{
return (cairo_device_t *) _cairo_device_create_in_error (status);
}
cairo_private cairo_status_t
_cairo_gl_context_init (cairo_gl_context_t *ctx);
cairo_private void
_cairo_gl_surface_init (cairo_device_t *device,
cairo_gl_surface_t *surface,
cairo_content_t content,
int width, int height);
static cairo_always_inline cairo_bool_t cairo_warn
_cairo_gl_surface_is_texture (cairo_gl_surface_t *surface)
{
return surface->tex != 0;
}
cairo_private cairo_status_t
_cairo_gl_surface_draw_image (cairo_gl_surface_t *dst,
cairo_image_surface_t *src,
int src_x, int src_y,
int width, int height,
int dst_x, int dst_y,
cairo_bool_t force_flush);
cairo_private cairo_int_status_t
_cairo_gl_surface_resolve_multisampling (cairo_gl_surface_t *surface);
static cairo_always_inline cairo_bool_t
_cairo_gl_device_has_glsl (cairo_device_t *device)
{
return ((cairo_gl_context_t *) device)->has_shader_support;
}
static cairo_always_inline cairo_bool_t
_cairo_gl_device_requires_power_of_two_textures (cairo_device_t *device)
{
return ((cairo_gl_context_t *) device)->tex_target == GL_TEXTURE_RECTANGLE;
}
static cairo_always_inline cairo_status_t cairo_warn
_cairo_gl_context_acquire (cairo_device_t *device,
cairo_gl_context_t **ctx)
{
cairo_status_t status;
status = cairo_device_acquire (device);
if (unlikely (status))
return status;
/* clear potential previous GL errors */
_cairo_gl_get_error ();
*ctx = (cairo_gl_context_t *) device;
return CAIRO_STATUS_SUCCESS;
}
static cairo_always_inline cairo_warn cairo_status_t
_cairo_gl_context_release (cairo_gl_context_t *ctx, cairo_status_t status)
{
GLenum err;
err = _cairo_gl_get_error ();
if (unlikely (err)) {
cairo_status_t new_status;
new_status = _cairo_error (CAIRO_STATUS_DEVICE_ERROR);
if (status == CAIRO_STATUS_SUCCESS)
status = new_status;
}
cairo_device_release (&(ctx)->base);
return status;
}
cairo_private void
_cairo_gl_context_set_destination (cairo_gl_context_t *ctx,
cairo_gl_surface_t *surface,
cairo_bool_t multisampling);
cairo_private void
_cairo_gl_context_bind_framebuffer (cairo_gl_context_t *ctx,
cairo_gl_surface_t *surface,
cairo_bool_t multisampling);
cairo_private cairo_gl_emit_rect_t
_cairo_gl_context_choose_emit_rect (cairo_gl_context_t *ctx);
cairo_private void
_cairo_gl_context_emit_rect (cairo_gl_context_t *ctx,
GLfloat x1, GLfloat y1,
GLfloat x2, GLfloat y2);
cairo_private cairo_gl_emit_span_t
_cairo_gl_context_choose_emit_span (cairo_gl_context_t *ctx);
cairo_private cairo_gl_emit_glyph_t
_cairo_gl_context_choose_emit_glyph (cairo_gl_context_t *ctx);
cairo_private void
_cairo_gl_context_activate (cairo_gl_context_t *ctx,
cairo_gl_tex_t tex_unit);
cairo_private cairo_bool_t
_cairo_gl_operator_is_supported (cairo_operator_t op);
cairo_private cairo_bool_t
_cairo_gl_ensure_stencil (cairo_gl_context_t *ctx,
cairo_gl_surface_t *surface);
cairo_private cairo_status_t
_cairo_gl_composite_init (cairo_gl_composite_t *setup,
cairo_operator_t op,
cairo_gl_surface_t *dst,
cairo_bool_t has_component_alpha);
cairo_private void
_cairo_gl_composite_fini (cairo_gl_composite_t *setup);
cairo_private cairo_status_t
_cairo_gl_composite_set_operator (cairo_gl_composite_t *setup,
cairo_operator_t op,
cairo_bool_t assume_component_alpha);
cairo_private void
_cairo_gl_composite_set_clip_region (cairo_gl_composite_t *setup,
cairo_region_t *clip_region);
cairo_private void
_cairo_gl_composite_set_clip(cairo_gl_composite_t *setup,
cairo_clip_t *clip);
cairo_private cairo_int_status_t
_cairo_gl_composite_set_source (cairo_gl_composite_t *setup,
const cairo_pattern_t *pattern,
const cairo_rectangle_int_t *sample,
const cairo_rectangle_int_t *extents,
cairo_bool_t use_texgen);
cairo_private void
_cairo_gl_composite_set_solid_source (cairo_gl_composite_t *setup,
const cairo_color_t *color);
cairo_private void
_cairo_gl_composite_set_source_operand (cairo_gl_composite_t *setup,
const cairo_gl_operand_t *source);
cairo_private cairo_int_status_t
_cairo_gl_composite_set_mask (cairo_gl_composite_t *setup,
const cairo_pattern_t *pattern,
const cairo_rectangle_int_t *sample,
const cairo_rectangle_int_t *extents,
cairo_bool_t use_texgen);
cairo_private void
_cairo_gl_composite_set_mask_operand (cairo_gl_composite_t *setup,
const cairo_gl_operand_t *mask);
cairo_private void
_cairo_gl_composite_set_spans (cairo_gl_composite_t *setup);
cairo_private void
_cairo_gl_composite_set_multisample (cairo_gl_composite_t *setup);
cairo_private cairo_status_t
_cairo_gl_composite_begin (cairo_gl_composite_t *setup,
cairo_gl_context_t **ctx);
cairo_private cairo_status_t
_cairo_gl_set_operands_and_operator (cairo_gl_composite_t *setup,
cairo_gl_context_t *ctx);
cairo_private void
_cairo_gl_composite_flush (cairo_gl_context_t *ctx);
cairo_private cairo_int_status_t
_cairo_gl_composite_emit_quad_as_tristrip (cairo_gl_context_t *ctx,
cairo_gl_composite_t *setup,
const cairo_point_t quad[4]);
cairo_private cairo_int_status_t
_cairo_gl_composite_emit_triangle_as_tristrip (cairo_gl_context_t *ctx,
cairo_gl_composite_t *setup,
const cairo_point_t triangle[3]);
cairo_private void
_cairo_gl_context_destroy_operand (cairo_gl_context_t *ctx,
cairo_gl_tex_t tex_unit);
cairo_private cairo_bool_t
_cairo_gl_get_image_format_and_type (cairo_gl_flavor_t flavor,
pixman_format_code_t pixman_format,
GLenum *internal_format, GLenum *format,
GLenum *type, cairo_bool_t *has_alpha,
cairo_bool_t *needs_swap);
cairo_private void
_cairo_gl_glyph_cache_init (cairo_gl_glyph_cache_t *cache);
cairo_private void
_cairo_gl_glyph_cache_fini (cairo_gl_context_t *ctx,
cairo_gl_glyph_cache_t *cache);
cairo_private cairo_int_status_t
_cairo_gl_surface_show_glyphs (void *abstract_dst,
cairo_operator_t op,
const cairo_pattern_t *source,
cairo_glyph_t *glyphs,
int num_glyphs,
cairo_scaled_font_t *scaled_font,
const cairo_clip_t *clip,
int *remaining_glyphs);
cairo_private cairo_status_t
_cairo_gl_context_init_shaders (cairo_gl_context_t *ctx);
cairo_private void
_cairo_gl_context_fini_shaders (cairo_gl_context_t *ctx);
static cairo_always_inline cairo_bool_t
_cairo_gl_context_is_flushed (cairo_gl_context_t *ctx)
{
return ctx->vb_offset == 0;
}
cairo_private cairo_status_t
_cairo_gl_get_shader_by_type (cairo_gl_context_t *ctx,
cairo_gl_operand_t *source,
cairo_gl_operand_t *mask,
cairo_bool_t use_coverage,
cairo_gl_shader_in_t in,
cairo_gl_shader_t **shader);
cairo_private void
_cairo_gl_shader_bind_float (cairo_gl_context_t *ctx,
GLint location,
float value);
cairo_private void
_cairo_gl_shader_bind_vec2 (cairo_gl_context_t *ctx,
GLint location,
float value0, float value1);
cairo_private void
_cairo_gl_shader_bind_vec3 (cairo_gl_context_t *ctx,
GLint location,
float value0,
float value1,
float value2);
cairo_private void
_cairo_gl_shader_bind_vec4 (cairo_gl_context_t *ctx,
GLint location,
float value0, float value1,
float value2, float value3);
cairo_private void
_cairo_gl_shader_bind_matrix (cairo_gl_context_t *ctx,
GLint location,
const cairo_matrix_t* m);
cairo_private void
_cairo_gl_shader_bind_matrix4f (cairo_gl_context_t *ctx,
GLint location,
GLfloat* gl_m);
cairo_private void
_cairo_gl_set_shader (cairo_gl_context_t *ctx,
cairo_gl_shader_t *shader);
cairo_private void
_cairo_gl_shader_fini (cairo_gl_context_t *ctx, cairo_gl_shader_t *shader);
cairo_private int
_cairo_gl_get_version (void);
cairo_private cairo_gl_flavor_t
_cairo_gl_get_flavor (void);
cairo_private unsigned long
_cairo_gl_get_vbo_size (void);
cairo_private cairo_bool_t
_cairo_gl_has_extension (const char *ext);
cairo_private cairo_status_t
_cairo_gl_dispatch_init(cairo_gl_dispatch_t *dispatch,
cairo_gl_get_proc_addr_func_t get_proc_addr);
cairo_private cairo_int_status_t
_cairo_gl_operand_init (cairo_gl_operand_t *operand,
const cairo_pattern_t *pattern,
cairo_gl_surface_t *dst,
const cairo_rectangle_int_t *sample,
const cairo_rectangle_int_t *extents,
cairo_bool_t use_texgen);
cairo_private void
_cairo_gl_solid_operand_init (cairo_gl_operand_t *operand,
const cairo_color_t *color);
cairo_private cairo_filter_t
_cairo_gl_operand_get_filter (cairo_gl_operand_t *operand);
cairo_private GLint
_cairo_gl_operand_get_gl_filter (cairo_gl_operand_t *operand);
cairo_private cairo_extend_t
_cairo_gl_operand_get_extend (cairo_gl_operand_t *operand);
cairo_private unsigned int
_cairo_gl_operand_get_vertex_size (const cairo_gl_operand_t *operand);
cairo_private cairo_bool_t
_cairo_gl_operand_needs_setup (cairo_gl_operand_t *dest,
cairo_gl_operand_t *source,
unsigned int vertex_offset);
cairo_private void
_cairo_gl_operand_bind_to_shader (cairo_gl_context_t *ctx,
cairo_gl_operand_t *operand,
cairo_gl_tex_t tex_unit);
cairo_private void
_cairo_gl_operand_emit (cairo_gl_operand_t *operand,
GLfloat ** vb,
GLfloat x,
GLfloat y);
cairo_private void
_cairo_gl_operand_copy (cairo_gl_operand_t *dst,
const cairo_gl_operand_t *src);
cairo_private void
_cairo_gl_operand_translate (cairo_gl_operand_t *operand,
double tx, double ty);
cairo_private void
_cairo_gl_operand_destroy (cairo_gl_operand_t *operand);
cairo_private const cairo_compositor_t *
_cairo_gl_msaa_compositor_get (void);
cairo_private const cairo_compositor_t *
_cairo_gl_span_compositor_get (void);
cairo_private const cairo_compositor_t *
_cairo_gl_traps_compositor_get (void);
cairo_private cairo_int_status_t
_cairo_gl_check_composite_glyphs (const cairo_composite_rectangles_t *extents,
cairo_scaled_font_t *scaled_font,
cairo_glyph_t *glyphs,
int *num_glyphs);
cairo_private cairo_int_status_t
_cairo_gl_composite_glyphs (void *_dst,
cairo_operator_t op,
cairo_surface_t *_src,
int src_x,
int src_y,
int dst_x,
int dst_y,
cairo_composite_glyphs_info_t *info);
cairo_private cairo_int_status_t
_cairo_gl_composite_glyphs_with_clip (void *_dst,
cairo_operator_t op,
cairo_surface_t *_src,
int src_x,
int src_y,
int dst_x,
int dst_y,
cairo_composite_glyphs_info_t *info,
cairo_clip_t *clip);
cairo_private cairo_surface_t *
_cairo_gl_surface_create_scratch (cairo_gl_context_t *ctx,
cairo_content_t content,
int width,
int height);
cairo_private cairo_surface_t *
_cairo_gl_surface_create_scratch_for_caching (cairo_gl_context_t *ctx,
cairo_content_t content,
int width,
int height);
cairo_private cairo_surface_t *
_cairo_gl_pattern_to_source (cairo_surface_t *dst,
const cairo_pattern_t *pattern,
cairo_bool_t is_mask,
const cairo_rectangle_int_t *extents,
const cairo_rectangle_int_t *sample,
int *src_x, int *src_y);
cairo_private cairo_int_status_t
_cairo_gl_msaa_compositor_draw_clip (cairo_gl_context_t *ctx,
cairo_gl_composite_t *setup,
cairo_clip_t *clip);
cairo_private cairo_surface_t *
_cairo_gl_white_source (void);
cairo_private void
_cairo_gl_scissor_to_rectangle (cairo_gl_surface_t *surface,
const cairo_rectangle_int_t *r);
static inline cairo_gl_operand_t *
source_to_operand (cairo_surface_t *surface)
{
cairo_gl_source_t *source = (cairo_gl_source_t *)surface;
return source ? &source->operand : NULL;
}
static inline void
_cairo_gl_glyph_cache_unlock (cairo_gl_glyph_cache_t *cache)
{
_cairo_rtree_unpin (&cache->rtree);
}
slim_hidden_proto (cairo_gl_surface_create);
slim_hidden_proto (cairo_gl_surface_create_for_texture);
#endif /* CAIRO_GL_PRIVATE_H */