| Flutter Impeller |

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

`#include <blit_command_gles.h>`

Inheritance diagram for impeller::BlitCopyBufferToTextureCommandGLES:

## Public Member Functions
| ~BlitCopyBufferToTextureCommandGLES () 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::BlitCopyBufferToTextureCommand
BufferView | source
std::shared_ptr< Texture > | destination
IRect | destination_region
uint32_t | slice = 0
Public Attributes inherited from impeller::BlitCommand
std::string | label

## Detailed Description

Definition at line 23 of file blit_command_gles.h.

## Constructor & Destructor Documentation

## ◆ ~BlitCopyBufferToTextureCommandGLES()

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

## Member Function Documentation

## ◆ Encode()

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

Implements impeller::BlitEncodeGLES.

Definition at line 201 of file blit_command_gles.cc.

202 {
203 TextureGLES& texture_gles = TextureGLES::Cast(*destination);
204
205 if (texture_gles.GetType() != TextureGLES::Type::kTexture) {
206 VALIDATION_LOG << "Incorrect texture usage flags for setting contents on "
207 "this texture object.";
208 return false;
209 }
210
211 if (texture_gles.IsWrapped()) {
212 VALIDATION_LOG << "Cannot set the contents of a wrapped texture.";
213 return false;
214 }
215
216 const auto& tex_descriptor = texture_gles.GetTextureDescriptor();
217
218 if (tex_descriptor.size.IsEmpty()) {
219 return true;
220 }
221
222 if (!tex_descriptor.IsValid() ||
223 source.range.length !=
224 BytesPerPixelForPixelFormat(tex_descriptor.format) *
225 destination_region.Area()) {
226 return false;
227 }
228
229 destination->SetCoordinateSystem(TextureCoordinateSystem::kUploadFromHost);
230
231 GLenum texture_type;
232 GLenum texture_target;
233 switch (tex_descriptor.type) {
234 case TextureType::kTexture2D:
235 texture_type = GL_TEXTURE_2D;
236 texture_target = GL_TEXTURE_2D;
237 break;
238 case TextureType::kTexture2DMultisample:
239 VALIDATION_LOG << "Multisample texture uploading is not supported for "
240 "the OpenGLES backend.";
241 return false;
242 case TextureType::kTextureCube:
243 texture_type = GL_TEXTURE_CUBE_MAP;
244 texture_target = GL_TEXTURE_CUBE_MAP_POSITIVE_X + slice;
245 break;
246 case TextureType::kTextureExternalOES:
247 texture_type = GL_TEXTURE_EXTERNAL_OES;
248 texture_target = GL_TEXTURE_EXTERNAL_OES;
249 break;
250 }
251
252 TexImage2DData data = TexImage2DData(tex_descriptor.format, source);
253 if (!data.IsValid()) {
254 VALIDATION_LOG << "Invalid texture format.";
255 return false;
256 }
257
258 auto gl_handle = texture_gles.GetGLHandle();
259 if (!gl_handle.has_value()) {
260 VALIDATION_LOG
261 << "Texture was collected before it could be uploaded to the GPU.";
262 return false;
263 }
264 const auto& gl = reactor.GetProcTable();
265 gl.BindTexture(texture_type, gl_handle.value());
266 const GLvoid* tex_data =
267 data.buffer_view.buffer->OnGetContents() + data.buffer_view.range.offset;
268
269 // GL_INVALID_OPERATION if the texture array has not been
270 // defined by a previous glTexImage2D operation.
271 if (!texture_gles.IsSliceInitialized(slice)) {
272 gl.TexImage2D(texture_target, // target
273 0u, // LOD level
274 data.internal_format, // internal format
275 tex_descriptor.size.width, // width
276 tex_descriptor.size.height, // height
277 0u, // border
278 data.external_format, // external format
279 data.type, // type
280 nullptr // data
281 );
282 texture_gles.MarkSliceInitialized(slice);
283 }
284
285 {
286 gl.PixelStorei(GL_UNPACK_ALIGNMENT, 1);
287 gl.TexSubImage2D(texture_target, // target
288 0u, // LOD level
289 destination_region.GetX(), // xoffset
290 destination_region.GetY(), // yoffset
291 destination_region.GetWidth(), // width
292 destination_region.GetHeight(), // height
293 data.external_format, // external format
294 data.type, // type
295 tex_data // data
296
297 );
298 }
299 return true;
300 }

References impeller::TRect< T >::Area(), impeller::BytesPerPixelForPixelFormat(), impeller::BackendCast< TextureGLES, Texture >::Cast(), data, impeller::BlitCopyBufferToTextureCommand::destination, impeller::BlitCopyBufferToTextureCommand::destination_region, impeller::TextureGLES::GetGLHandle(), impeller::TRect< T >::GetHeight(), impeller::ReactorGLES::GetProcTable(), impeller::Texture::GetTextureDescriptor(), impeller::TextureGLES::GetType(), impeller::TRect< T >::GetWidth(), impeller::TRect< T >::GetX(), impeller::TRect< T >::GetY(), impeller::TextureGLES::IsSliceInitialized(), impeller::TextureGLES::kTexture, impeller::kTexture2D, impeller::kTexture2DMultisample, impeller::kTextureCube, impeller::kTextureExternalOES, impeller::kUploadFromHost, impeller::Range::length, impeller::TextureGLES::MarkSliceInitialized(), impeller::BufferView::range, impeller::BlitCopyBufferToTextureCommand::slice, impeller::BlitCopyBufferToTextureCommand::source, and VALIDATION_LOG.

## ◆ GetLabel()

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

Implements impeller::BlitEncodeGLES.

Definition at line 197 of file blit_command_gles.cc.

197 {
198 return label;
199 }

References impeller::BlitCommand::label.

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::TextureType::kTextureExternalOES
@ kTextureExternalOES
data
std::shared_ptr< const fml::Mapping > data
Definition: texture_gles.cc:63
impeller::TRect::GetX
constexpr Type GetX() const
Returns the X coordinate of the upper left corner, equivalent to |GetOrigin().x|.
Definition: rect.h:327
impeller::BlitCopyBufferToTextureCommand::destination_region
IRect destination_region
Definition: blit_command.h:40
impeller::BufferView::range
Range range
Definition: buffer_view.h:17
impeller::TRect::GetHeight
constexpr Type GetHeight() const
Returns the height of the rectangle, equivalent to |GetSize().height|.
Definition: rect.h:341
impeller::TextureCoordinateSystem::kUploadFromHost
@ kUploadFromHost
impeller::TextureType::kTexture2DMultisample
@ kTexture2DMultisample
impeller::BlitCommand::label
std::string label
Definition: blit_command.h:15
impeller::BlitCopyBufferToTextureCommand::source
BufferView source
Definition: blit_command.h:38
impeller::BytesPerPixelForPixelFormat
constexpr size_t BytesPerPixelForPixelFormat(PixelFormat format)
Definition: formats.h:466
impeller::BlitCopyBufferToTextureCommand::slice
uint32_t slice
Definition: blit_command.h:41
impeller::TRect::GetWidth
constexpr Type GetWidth() const
Returns the width of the rectangle, equivalent to |GetSize().width|.
Definition: rect.h:335
impeller::TextureType::kTextureCube
@ kTextureCube
impeller::TextureType::kTexture2D
@ kTexture2D
VALIDATION_LOG
#define VALIDATION_LOG
Definition: validation.h:91
impeller::BackendCast< TextureGLES, Texture >::Cast
static TextureGLES & Cast(Texture &base)
Definition: backend_cast.h:13
impeller::TRect::Area
constexpr T Area() const
Get the area of the rectangle, equivalent to |GetSize().Area()|.
Definition: rect.h:370
impeller::Range::length
size_t length
Definition: range.h:15
impeller::TextureGLES::Type::kTexture
@ kTexture
impeller::TRect::GetY
constexpr Type GetY() const
Returns the Y coordinate of the upper left corner, equivalent to |GetOrigin().y|.
Definition: rect.h:331
impeller::BlitCopyBufferToTextureCommand::destination
std::shared_ptr< Texture > destination
Definition: blit_command.h:39