Flutter Impeller
impeller::BlitCopyTextureToTextureCommandGLES Struct Reference

#include <blit_command_gles.h>

Inheritance diagram for impeller::BlitCopyTextureToTextureCommandGLES:
impeller::BlitEncodeGLES impeller::BlitCopyTextureToTextureCommand impeller::BackendCast< BlitEncodeGLES, BlitCommand > impeller::BlitCommand

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 ()
 

Additional Inherited Members

- Static Public Member Functions inherited from impeller::BackendCast< BlitEncodeGLES, BlitCommand >
static BlitEncodeGLESCast (BlitCommand &base)
 
static const BlitEncodeGLESCast (const BlitCommand &base)
 
static BlitEncodeGLESCast (BlitCommand *base)
 
static const BlitEncodeGLESCast (const BlitCommand *base)
 
- Public Attributes inherited from impeller::BlitCopyTextureToTextureCommand
std::shared_ptr< Texturesource
 
std::shared_ptr< Texturedestination
 
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 93 of file blit_command_gles.cc.

94  {
95  const auto& gl = reactor.GetProcTable();
96 
97  // glBlitFramebuffer is a GLES3 proc. Since we target GLES2, we need to
98  // emulate the blit when it's not available in the driver.
99  if (!gl.BlitFramebuffer.IsAvailable()) {
100  // TODO(157064): Emulate the blit using a raster draw call here.
101  VALIDATION_LOG << "Texture blit fallback not implemented yet for GLES2.";
102  return false;
103  }
104 
105  GLuint read_fbo = GL_NONE;
106  GLuint draw_fbo = GL_NONE;
107  fml::ScopedCleanupClosure delete_fbos([&gl, &read_fbo, &draw_fbo]() {
108  DeleteFBO(gl, read_fbo, GL_READ_FRAMEBUFFER);
109  DeleteFBO(gl, draw_fbo, GL_DRAW_FRAMEBUFFER);
110  });
111 
112  {
113  auto read = ConfigureFBO(gl, source, GL_READ_FRAMEBUFFER);
114  if (!read.has_value()) {
115  return false;
116  }
117  read_fbo = read.value();
118  }
119 
120  {
121  auto draw = ConfigureFBO(gl, destination, GL_DRAW_FRAMEBUFFER);
122  if (!draw.has_value()) {
123  return false;
124  }
125  draw_fbo = draw.value();
126  }
127 
128  gl.Disable(GL_SCISSOR_TEST);
129  gl.Disable(GL_DEPTH_TEST);
130  gl.Disable(GL_STENCIL_TEST);
131 
132  gl.BlitFramebuffer(source_region.GetX(), // srcX0
133  source_region.GetY(), // srcY0
134  source_region.GetWidth(), // srcX1
135  source_region.GetHeight(), // srcY1
136  destination_origin.x, // dstX0
137  destination_origin.y, // dstY0
138  source_region.GetWidth(), // dstX1
139  source_region.GetHeight(), // dstY1
140  GL_COLOR_BUFFER_BIT, // mask
141  GL_NEAREST // filter
142  );
143 
144  return true;
145 };
static std::optional< GLuint > ConfigureFBO(const ProcTableGLES &gl, const std::shared_ptr< Texture > &texture, GLenum fbo_type)
static void DeleteFBO(const ProcTableGLES &gl, GLuint fbo, GLenum type)
std::shared_ptr< Texture > destination
Definition: blit_command.h:21
std::shared_ptr< Texture > source
Definition: blit_command.h:20
constexpr Type GetY() const
Returns the Y coordinate of the upper left corner, equivalent to |GetOrigin().y|.
Definition: rect.h:341
constexpr Type GetHeight() const
Returns the height of the rectangle, equivalent to |GetSize().height|.
Definition: rect.h:351
constexpr Type GetX() const
Returns the X coordinate of the upper left corner, equivalent to |GetOrigin().x|.
Definition: rect.h:337
constexpr Type GetWidth() const
Returns the width of the rectangle, equivalent to |GetSize().width|.
Definition: rect.h:345
#define VALIDATION_LOG
Definition: validation.h:91

References impeller::ConfigureFBO(), impeller::DeleteFBO(), impeller::BlitCopyTextureToTextureCommand::destination, impeller::BlitCopyTextureToTextureCommand::destination_origin, impeller::TRect< T >::GetHeight(), impeller::ReactorGLES::GetProcTable(), impeller::TRect< T >::GetWidth(), impeller::TRect< T >::GetX(), impeller::TRect< T >::GetY(), impeller::BlitCopyTextureToTextureCommand::source, impeller::BlitCopyTextureToTextureCommand::source_region, VALIDATION_LOG, impeller::TPoint< T >::x, and impeller::TPoint< T >::y.

◆ GetLabel()

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

Implements impeller::BlitEncodeGLES.

Definition at line 89 of file blit_command_gles.cc.

89  {
90  return label;
91 }

References impeller::BlitCommand::label.


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