impeller::BlitCopyTextureToTextureCommandGLES Struct Reference

#include <blit_command_gles.h>

Inheritance diagram for impeller::BlitCopyTextureToTextureCommandGLES:

Public Member Functions
	~BlitCopyTextureToTextureCommandGLES () override
std::string	GetLabel () const override
bool	Encode (const ReactorGLES &reactor) const override
Public Member Functions inherited from impeller::BlitEncodeGLES
virtual	~BlitEncodeGLES ()
virtual std::string	GetLabel () const =0
virtual bool	Encode (const ReactorGLES &reactor) const =0

Additional Inherited Members
Static Public Member Functions inherited from impeller::BackendCast< BlitEncodeGLES, BlitCommand >
static BlitEncodeGLES &	Cast (BlitCommand &base)
static const BlitEncodeGLES &	Cast (const BlitCommand &base)
static BlitEncodeGLES *	Cast (BlitCommand *base)
static const BlitEncodeGLES *	Cast (const BlitCommand *base)
Public Attributes inherited from impeller::BlitCopyTextureToTextureCommand
std::shared_ptr< Texture >	source
std::shared_ptr< Texture >	destination
IRect	source_region
IPoint	destination_origin
Public Attributes inherited from impeller::BlitCommand
std::string	label

Detailed Description

Definition at line 33 of file blit_command_gles.h.

Constructor & Destructor Documentation

~BlitCopyTextureToTextureCommandGLES()

impeller::BlitCopyTextureToTextureCommandGLES::~BlitCopyTextureToTextureCommandGLES ( )

overridedefault

Member Function Documentation

Encode()

bool impeller::BlitCopyTextureToTextureCommandGLES::Encode ( const ReactorGLES &  reactor ) const

overridevirtual

Implements impeller::BlitEncodeGLES.

Definition at line 68 of file blit_command_gles.cc.

                                      {
  const auto& gl = reactor.GetProcTable();
 
  // glBlitFramebuffer is a GLES3 proc. Since we target GLES2, we need to
  // emulate the blit when it's not available in the driver.
  if (!gl.BlitFramebuffer.IsAvailable()) {
    // TODO(bdero): Emulate the blit using a raster draw call here.
    FML_LOG(ERROR) << "Texture blit fallback not implemented yet for GLES2.";
    return false;
  }
 
  GLuint read_fbo = GL_NONE;
  GLuint draw_fbo = GL_NONE;
  fml::ScopedCleanupClosure delete_fbos([&gl, &read_fbo, &draw_fbo]() {
    DeleteFBO(gl, read_fbo, GL_READ_FRAMEBUFFER);
    DeleteFBO(gl, draw_fbo, GL_DRAW_FRAMEBUFFER);
  });
 
  {
    auto read = ConfigureFBO(gl, source, GL_READ_FRAMEBUFFER);
    if (!read.has_value()) {
      return false;
    }
    read_fbo = read.value();
  }
 
  {
    auto draw = ConfigureFBO(gl, destination, GL_DRAW_FRAMEBUFFER);
    if (!draw.has_value()) {
      return false;
    }
    draw_fbo = draw.value();
  }
 
  gl.Disable(GL_SCISSOR_TEST);
  gl.Disable(GL_DEPTH_TEST);
  gl.Disable(GL_STENCIL_TEST);
 
  gl.BlitFramebuffer(source_region.GetX(),       // srcX0
                     source_region.GetY(),       // srcY0
                     source_region.GetWidth(),   // srcX1
                     source_region.GetHeight(),  // srcY1
                     destination_origin.x,       // dstX0
                     destination_origin.y,       // dstY0
                     source_region.GetWidth(),   // dstX1
                     source_region.GetHeight(),  // dstY1
                     GL_COLOR_BUFFER_BIT,        // mask
                     GL_NEAREST                  // filter
  );
 
  return true;
};

GetLabel()

std::string impeller::BlitCopyTextureToTextureCommandGLES::GetLabel ( ) const

overridevirtual

Implements impeller::BlitEncodeGLES.

Definition at line 64 of file blit_command_gles.cc.

                                                              {
  return label;
}

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The documentation for this struct was generated from the following files:

• impeller/renderer/backend/gles/blit_command_gles.h
• impeller/renderer/backend/gles/blit_command_gles.cc