| 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 403 of file blit_command_gles.cc.

403 {
404 const auto& gl = reactor.GetProcTable();
405
406 // glBlitFramebuffer is a GLES3 proc. Since we target GLES2, we need to
407 // emulate the blit when it's not available in the driver.
408 if (!gl.BlitFramebuffer.IsAvailable()) {
409 // TODO(157064): Emulate the blit using a raster draw call here.
410 VALIDATION_LOG << "Texture blit fallback not implemented yet for GLES2.";
411 return false;
412 }
413
414 destination->SetCoordinateSystem(source->GetCoordinateSystem());
415
416 GLuint read_fbo = GL_NONE;
417 GLuint draw_fbo = GL_NONE;
418 fml::ScopedCleanupClosure delete_fbos([&gl, &read_fbo, &draw_fbo]() {
419 DeleteFBO(gl, read_fbo, GL_READ_FRAMEBUFFER);
420 DeleteFBO(gl, draw_fbo, GL_DRAW_FRAMEBUFFER);
421 });
422
423 {
424 auto read = ConfigureFBO(gl, source, GL_READ_FRAMEBUFFER);
425 if (!read.has_value()) {
426 return false;
427 }
428 read_fbo = read.value();
429 }
430
431 {
432 auto draw = ConfigureFBO(gl, destination, GL_DRAW_FRAMEBUFFER);
433 if (!draw.has_value()) {
434 return false;
435 }
436 draw_fbo = draw.value();
437 }
438
439 gl.Disable(GL_SCISSOR_TEST);
440 gl.Disable(GL_DEPTH_TEST);
441 gl.Disable(GL_STENCIL_TEST);
442
443 const IRect source_region = IRect::MakeSize(source->GetSize());
444 const IRect destination_region = IRect::MakeSize(destination->GetSize());
445
446 gl.BlitFramebuffer(source_region.GetX(), // srcX0
447 source_region.GetY(), // srcY0
448 source_region.GetWidth(), // srcX1
449 source_region.GetHeight(), // srcY1
450 destination_region.GetX(), // dstX0
451 destination_region.GetY(), // dstY0
452 destination_region.GetWidth(), // dstX1
453 destination_region.GetHeight(), // dstY1
454 GL_COLOR_BUFFER_BIT, // mask
455 GL_LINEAR // filter
456 );
457
458 return true;
459 }
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::IRect
IRect64 IRect
Definition: rect.h:791
impeller::DeleteFBO
static void DeleteFBO(const ProcTableGLES &gl, GLuint fbo, GLenum type)
Definition: blit_command_gles.cc:43
impeller::BlitResizeTextureCommand::destination
std::shared_ptr< Texture > destination
Definition: blit_command.h:28
impeller::BlitResizeTextureCommand::source
std::shared_ptr< Texture > source
Definition: blit_command.h:27
impeller::TRect::MakeSize
constexpr static TRect MakeSize(const TSize< U > &size)
Definition: rect.h:150
VALIDATION_LOG
#define VALIDATION_LOG
Definition: validation.h:91

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 399 of file blit_command_gles.cc.

399 {
400 return "Resize Texture";
401 }

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