| Flutter Impeller |

Public Member Functions | List of all members
impeller::BlitResizeTextureCommandGLES Struct Reference

`#include <blit_command_gles.h>`

Inheritance diagram for impeller::BlitResizeTextureCommandGLES:

## Public Member Functions
| ~BlitResizeTextureCommandGLES () 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 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::BlitResizeTextureCommand
std::shared_ptr< Texture > | source
std::shared_ptr< Texture > | destination
Public Attributes inherited from impeller::BlitCommand
std::string | label

## Detailed Description

Definition at line 62 of file blit_command_gles.h.

## Constructor & Destructor Documentation

## ◆ ~BlitResizeTextureCommandGLES()

impeller::BlitResizeTextureCommandGLES::~BlitResizeTextureCommandGLES | ( |  | ) |
| override default

## Member Function Documentation

## ◆ Encode()

bool impeller::BlitResizeTextureCommandGLES::Encode | ( | const ReactorGLES & | reactor | ) | const
| override virtual

Implements impeller::BlitEncodeGLES.

Definition at line 401 of file blit_command_gles.cc.

401 {
402 const auto& gl = reactor.GetProcTable();
403
404 // glBlitFramebuffer is a GLES3 proc. Since we target GLES2, we need to
405 // emulate the blit when it's not available in the driver.
406 if (!gl.BlitFramebuffer.IsAvailable()) {
407 // TODO(157064): Emulate the blit using a raster draw call here.
408 VALIDATION_LOG << "Texture blit fallback not implemented yet for GLES2.";
409 return false;
410 }
411
412 destination->SetCoordinateSystem(source->GetCoordinateSystem());
413
414 GLuint read_fbo = GL_NONE;
415 GLuint draw_fbo = GL_NONE;
416 fml::ScopedCleanupClosure delete_fbos([&gl, &read_fbo, &draw_fbo]() {
417 DeleteFBO(gl, read_fbo, GL_READ_FRAMEBUFFER);
418 DeleteFBO(gl, draw_fbo, GL_DRAW_FRAMEBUFFER);
419 });
420
421 {
422 auto read = ConfigureFBO(gl, source, GL_READ_FRAMEBUFFER);
423 if (!read.has_value()) {
424 return false;
425 }
426 read_fbo = read.value();
427 }
428
429 {
430 auto draw = ConfigureFBO(gl, destination, GL_DRAW_FRAMEBUFFER);
431 if (!draw.has_value()) {
432 return false;
433 }
434 draw_fbo = draw.value();
435 }
436
437 gl.Disable(GL_SCISSOR_TEST);
438 gl.Disable(GL_DEPTH_TEST);
439 gl.Disable(GL_STENCIL_TEST);
440
441 const IRect source_region = IRect::MakeSize(source->GetSize());
442 const IRect destination_region = IRect::MakeSize(destination->GetSize());
443
444 gl.BlitFramebuffer(source_region.GetX(), // srcX0
445 source_region.GetY(), // srcY0
446 source_region.GetWidth(), // srcX1
447 source_region.GetHeight(), // srcY1
448 destination_region.GetX(), // dstX0
449 destination_region.GetY(), // dstY0
450 destination_region.GetWidth(), // dstX1
451 destination_region.GetHeight(), // dstY1
452 GL_COLOR_BUFFER_BIT, // mask
453 GL_LINEAR // filter
454 );
455
456 return true;
457 }

References impeller::ConfigureFBO(), impeller::DeleteFBO(), impeller::TRect< T >::GetHeight(), impeller::ReactorGLES::GetProcTable(), impeller::TRect< T >::GetWidth(), impeller::TRect< T >::GetX(), impeller::TRect< T >::GetY(), and VALIDATION_LOG.

## ◆ GetLabel()

std::string impeller::BlitResizeTextureCommandGLES::GetLabel | ( |  | ) | const
| override virtual

Implements impeller::BlitEncodeGLES.

Definition at line 397 of file blit_command_gles.cc.

397 {
398 return "Resize Texture";
399 }

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

impeller::BlitResizeTextureCommand::destination
std::shared_ptr< Texture > destination
Definition: blit_command.h:28
impeller::DeleteFBO
static void DeleteFBO(const ProcTableGLES &gl, GLuint fbo, GLenum type)
Definition: blit_command_gles.cc:43
impeller::ConfigureFBO
static std::optional< GLuint > ConfigureFBO(const ProcTableGLES &gl, const std::shared_ptr< Texture > &texture, GLenum fbo_type)
Definition: blit_command_gles.cc:50
impeller::BlitResizeTextureCommand::source
std::shared_ptr< Texture > source
Definition: blit_command.h:27
VALIDATION_LOG
#define VALIDATION_LOG
Definition: validation.h:91
impeller::TRect::MakeSize
constexpr static TRect MakeSize(const TSize< U > &size)
Definition: rect.h:150
impeller::IRect
IRect64 IRect
Definition: rect.h:795