fl_framebuffer.h File Reference

#include <epoxy/gl.h>
#include <glib-object.h>

Go to the source code of this file.

Functions
G_BEGIN_DECLS FlFramebuffer *	fl_framebuffer_new (GLint format, size_t width, size_t height)
GLuint	fl_framebuffer_get_id (FlFramebuffer *framebuffer)
GLuint	fl_framebuffer_get_texture_id (FlFramebuffer *framebuffer)
GLenum	fl_framebuffer_get_target (FlFramebuffer *framebuffer)
size_t	fl_framebuffer_get_width (FlFramebuffer *framebuffer)
size_t	fl_framebuffer_get_height (FlFramebuffer *framebuffer)

Function Documentation

fl_framebuffer_get_height()

size_t fl_framebuffer_get_height

(

FlFramebuffer *

framebuffer

)

fl_framebuffer_get_height: @framebuffer: an #FlFramebuffer.

Gets the height of the framebuffer in pixels.

Returns: height in pixels.

Definition at line 101 of file fl_framebuffer.cc.

                                                      {
  return self->height;
}

Referenced by present_layers(), render_with_blit(), and render_with_textures().

fl_framebuffer_get_id()

GLuint fl_framebuffer_get_id

(

FlFramebuffer *

framebuffer

)

fl_framebuffer_get_id: @framebuffer: an #FlFramebuffer.

Gets the ID for this framebuffer.

Returns: OpenGL framebuffer id or 0 if creation failed.

Definition at line 85 of file fl_framebuffer.cc.

                                                  {
  return self->framebuffer_id;
}

Referenced by create_opengl_backing_store(), present_layers(), and render_with_blit().

fl_framebuffer_get_target()

GLenum fl_framebuffer_get_target

(

FlFramebuffer *

framebuffer

)

fl_framebuffer_get_target: @framebuffer: an #FlFramebuffer.

Gets target texture (example GL_TEXTURE_2D or GL_TEXTURE_RECTANGLE).

Returns: target texture.

Definition at line 93 of file fl_framebuffer.cc.

                                                      {
  return GL_TEXTURE_2D;
}

fl_framebuffer_get_texture_id()

GLuint fl_framebuffer_get_texture_id

(

FlFramebuffer *

framebuffer

)

fl_framebuffer_get_texture_id: @framebuffer: an #FlFramebuffer.

Gets the ID of the texture associated with this framebuffer.

Returns: OpenGL texture id or 0 if creation failed.

Definition at line 89 of file fl_framebuffer.cc.

                                                          {
  return self->texture_id;
}

Referenced by present_layers(), and render_with_textures().

fl_framebuffer_get_width()

size_t fl_framebuffer_get_width

(

FlFramebuffer *

framebuffer

)

fl_framebuffer_get_width: @framebuffer: an #FlFramebuffer.

Gets the width of the framebuffer in pixels.

Returns: width in pixels.

Definition at line 97 of file fl_framebuffer.cc.

                                                     {
  return self->width;
}

Referenced by present_layers(), render_with_blit(), and render_with_textures().

fl_framebuffer_new()

G_BEGIN_DECLS FlFramebuffer* fl_framebuffer_new	(	GLint	format,
		size_t	width,
		size_t	height
	)

FlFramebuffer:

#FlFramebuffer creates framebuffers and their backing textures for use by the Flutter compositor. fl_framebuffer_new: @format: format, e.g. GL_RGB, GL_BGR @width: width of texture. @height: height of texture.

Creates a new frame buffer. Requires a valid OpenGL context to create.

Returns: a new #FlFramebuffer.

Definition at line 46 of file fl_framebuffer.cc.

                                                                             {
  FlFramebuffer* provider =
      FL_FRAMEBUFFER(g_object_new(fl_framebuffer_get_type(), nullptr));
 
  provider->width = width;
  provider->height = height;
 
  glGenTextures(1, &provider->texture_id);
  glGenFramebuffers(1, &provider->framebuffer_id);
 
  glBindFramebuffer(GL_FRAMEBUFFER, provider->framebuffer_id);
 
  glBindTexture(GL_TEXTURE_2D, provider->texture_id);
  glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
  glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
  glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, format,
               GL_UNSIGNED_BYTE, NULL);
  glBindTexture(GL_TEXTURE_2D, 0);
 
  glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
                         provider->texture_id, 0);
 
  glGenRenderbuffers(1, &provider->depth_stencil);
  glBindRenderbuffer(GL_RENDERBUFFER, provider->depth_stencil);
  glRenderbufferStorage(GL_RENDERBUFFER,      // target
                        GL_DEPTH24_STENCIL8,  // internal format
                        width,                // width
                        height                // height
  );
  glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
                            GL_RENDERBUFFER, provider->depth_stencil);
  glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT,
                            GL_RENDERBUFFER, provider->depth_stencil);
 
  return provider;
}

References format, height, and width.

Referenced by create_opengl_backing_store(), present_layers(), and TEST().