fl_compositor_opengl_shader.h File Reference

#include <glib-object.h>
#include "flutter/shell/platform/linux/fl_opengl_manager.h"

Go to the source code of this file.

Functions
G_BEGIN_DECLS	G_DECLARE_FINAL_TYPE (FlCompositorOpenGLShader, fl_compositor_opengl_shader, FL, COMPOSITOR_OPENGL_SHADER, GObject) FlCompositorOpenGLShader *fl_compositor_opengl_shader_new(FlOpenGLManager *opengl_manager)
void	fl_compositor_opengl_shader_use (FlCompositorOpenGLShader *shader)
void	fl_compositor_opengl_shader_set_offset (FlCompositorOpenGLShader *shader, double x, double y)
void	fl_compositor_opengl_shader_set_scale (FlCompositorOpenGLShader *shader, double x, double y)

Function Documentation

fl_compositor_opengl_shader_set_offset()

void fl_compositor_opengl_shader_set_offset	(	FlCompositorOpenGLShader *	shader,
		double	x,
		double	y
	)

fl_compositor_opengl_shader_set_offset: @shader: an #FlCompositorOpenGLShader. @x: horizontal offset. @y: vertical offset.

Sets the layer offset uniform. The program must be current (see fl_compositor_opengl_shader_use).

Definition at line 206 of file fl_compositor_opengl_shader.cc.

                                                      {
  g_return_if_fail(FL_IS_COMPOSITOR_OPENGL_SHADER(self));
  glUniform2f(self->offset_location, x, y);
}

References x, and y.

fl_compositor_opengl_shader_set_scale()

void fl_compositor_opengl_shader_set_scale	(	FlCompositorOpenGLShader *	shader,
		double	x,
		double	y
	)

fl_compositor_opengl_shader_set_scale: @shader: an #FlCompositorOpenGLShader. @x: horizontal scale. @y: vertical scale.

Sets the layer scale uniform. The program must be current (see fl_compositor_opengl_shader_use).

Definition at line 213 of file fl_compositor_opengl_shader.cc.

                                                     {
  g_return_if_fail(FL_IS_COMPOSITOR_OPENGL_SHADER(self));
  glUniform2f(self->scale_location, x, y);
}

References x, and y.

fl_compositor_opengl_shader_use()

void fl_compositor_opengl_shader_use

(

FlCompositorOpenGLShader *

shader

)

fl_compositor_opengl_shader_use: @shader: an #FlCompositorOpenGLShader.

Binds the shader's vertex buffer, configures the vertex attributes and makes the program current. Requires a valid OpenGL context.

Definition at line 189 of file fl_compositor_opengl_shader.cc.

                                                                     {
  g_return_if_fail(FL_IS_COMPOSITOR_OPENGL_SHADER(self));
 
  glBindBuffer(GL_ARRAY_BUFFER, self->vertex_buffer);
  GLint position_location = glGetAttribLocation(self->program, "position");
  glEnableVertexAttribArray(position_location);
  glVertexAttribPointer(position_location, 2, GL_FLOAT, GL_FALSE,
                        sizeof(GLfloat) * 4, 0);
  GLint texcoord_location = glGetAttribLocation(self->program, "in_texcoord");
  glEnableVertexAttribArray(texcoord_location);
  glVertexAttribPointer(texcoord_location, 2, GL_FLOAT, GL_FALSE,
                        sizeof(GLfloat) * 4,
                        reinterpret_cast<void*>(sizeof(GLfloat) * 2));
 
  glUseProgram(self->program);
}

Referenced by fl_compositor_opengl_present_layers().

G_DECLARE_FINAL_TYPE()

G_BEGIN_DECLS G_DECLARE_FINAL_TYPE	(	FlCompositorOpenGLShader	,
		fl_compositor_opengl_shader	,
		FL	,
		COMPOSITOR_OPENGL_SHADER	,
		GObject
	)

FlCompositorOpenGLShader:

#FlCompositorOpenGLShader is the shader program used by #FlCompositorOpenGL to composite Flutter layers onto the framebuffer. fl_compositor_opengl_shader_new: @opengl_manager: an #FlOpenGLManager.

Creates and compiles the compositor shader program. Requires a valid OpenGL context to create.

Returns: a new #FlCompositorOpenGLShader.