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 23 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 66 of file blit_command_gles.cc.

67  {
68  const auto& gl = reactor.GetProcTable();
69 
70  // glBlitFramebuffer is a GLES3 proc. Since we target GLES2, we need to
71  // emulate the blit when it's not available in the driver.
72  if (!gl.BlitFramebuffer.IsAvailable()) {
73  // TODO(bdero): Emulate the blit using a raster draw call here.
74  FML_LOG(ERROR) << "Texture blit fallback not implemented yet for GLES2.";
75  return false;
76  }
77 
78  GLuint read_fbo = GL_NONE;
79  GLuint draw_fbo = GL_NONE;
80  fml::ScopedCleanupClosure delete_fbos([&gl, &read_fbo, &draw_fbo]() {
81  DeleteFBO(gl, read_fbo, GL_READ_FRAMEBUFFER);
82  DeleteFBO(gl, draw_fbo, GL_DRAW_FRAMEBUFFER);
83  });
84 
85  {
86  auto read = ConfigureFBO(gl, source, GL_READ_FRAMEBUFFER);
87  if (!read.has_value()) {
88  return false;
89  }
90  read_fbo = read.value();
91  }
92 
93  {
94  auto draw = ConfigureFBO(gl, destination, GL_DRAW_FRAMEBUFFER);
95  if (!draw.has_value()) {
96  return false;
97  }
98  draw_fbo = draw.value();
99  }
100 
101  gl.Disable(GL_SCISSOR_TEST);
102  gl.Disable(GL_DEPTH_TEST);
103  gl.Disable(GL_STENCIL_TEST);
104 
105  gl.BlitFramebuffer(source_region.GetX(), // srcX0
106  source_region.GetY(), // srcY0
107  source_region.GetWidth(), // srcX1
108  source_region.GetHeight(), // srcY1
109  destination_origin.x, // dstX0
110  destination_origin.y, // dstY0
111  source_region.GetWidth(), // dstX1
112  source_region.GetHeight(), // dstY1
113  GL_COLOR_BUFFER_BIT, // mask
114  GL_NEAREST // filter
115  );
116 
117  return true;
118 };

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, impeller::TPoint< T >::x, and impeller::TPoint< T >::y.

◆ GetLabel()

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

Implements impeller::BlitEncodeGLES.

Definition at line 62 of file blit_command_gles.cc.

62  {
63  return label;
64 }

References impeller::BlitCommand::label.


The documentation for this struct was generated from the following files:
impeller::TPoint::y
Type y
Definition: point.h:31
impeller::DeleteFBO
static void DeleteFBO(const ProcTableGLES &gl, GLuint fbo, GLenum type)
Definition: blit_command_gles.cc:16
impeller::ConfigureFBO
static std::optional< GLuint > ConfigureFBO(const ProcTableGLES &gl, const std::shared_ptr< Texture > &texture, GLenum fbo_type)
Definition: blit_command_gles.cc:23
impeller::BlitCopyTextureToTextureCommand::destination
std::shared_ptr< Texture > destination
Definition: blit_command.h:20
impeller::TRect::GetX
constexpr Type GetX() const
Returns the X coordinate of the upper left corner, equivalent to |GetOrigin().x|.
Definition: rect.h:300
impeller::TRect::GetHeight
constexpr Type GetHeight() const
Returns the height of the rectangle, equivalent to |GetSize().height|.
Definition: rect.h:314
impeller::BlitCopyTextureToTextureCommand::destination_origin
IPoint destination_origin
Definition: blit_command.h:22
impeller::BlitCommand::label
std::string label
Definition: blit_command.h:15
impeller::TRect::GetWidth
constexpr Type GetWidth() const
Returns the width of the rectangle, equivalent to |GetSize().width|.
Definition: rect.h:308
impeller::BlitCopyTextureToTextureCommand::source
std::shared_ptr< Texture > source
Definition: blit_command.h:19
impeller::TPoint::x
Type x
Definition: point.h:30
impeller::BlitCopyTextureToTextureCommand::source_region
IRect source_region
Definition: blit_command.h:21
impeller::TRect::GetY
constexpr Type GetY() const
Returns the Y coordinate of the upper left corner, equivalent to |GetOrigin().y|.
Definition: rect.h:304