FlutterDarwinExternalTextureMetal Class Reference

#include <FlutterDarwinExternalTextureMetal.h>

Inheritance diagram for FlutterDarwinExternalTextureMetal:

Instance Methods
(nullable instancetype)	- initWithTextureCache:textureID:texture:enableImpeller:
(void)	- paintContext:bounds:freeze:sampling:
(void)	- onGrContextCreated
(void)	- onGrContextDestroyed
(void)	- markNewFrameAvailable
(void)	- onTextureUnregistered

Properties
int64_t	textureID

Detailed Description

Definition at line 45 of file FlutterDarwinExternalTextureMetal.h.

Method Documentation

initWithTextureCache:textureID:texture:enableImpeller:

- (nullable instancetype) initWithTextureCache:		(nonnull CVMetalTextureCacheRef)	textureCache
textureID:		(int64_t)	textureID
texture:		(nonnull NSObject< FlutterTexture > *)	texture
enableImpeller:		(BOOL)	enableImpeller

markNewFrameAvailable

- (void) markNewFrameAvailable

Definition at line 37 of file FlutterDarwinExternalTextureMetal.mm.

                              {
  _textureFrameAvailable = YES;
}

onGrContextCreated

- (void) onGrContextCreated

Definition at line 37 of file FlutterDarwinExternalTextureMetal.mm.

                           {
  // External images in this backend have no thread affinity and are not tied to the context in any
  // way. Instead, they are tied to the Metal device which is associated with the cache already and
  // is consistent throughout the shell run.
}

onGrContextDestroyed

- (void) onGrContextDestroyed

Definition at line 37 of file FlutterDarwinExternalTextureMetal.mm.

                             {
  // The image must be reset because it is tied to the onscreen context. But the pixel buffer that
  // created the image is still around. In case of context reacquisition, that last pixel
  // buffer will be used to materialize the image in case the application fails to provide a new
  // one.
  _externalImage.reset();
  if (_textureCache) {
    CVMetalTextureCacheFlush(_textureCache, /* options (must be zero) */ 0);
  }
}

onTextureUnregistered

- (void) onTextureUnregistered

Definition at line 37 of file FlutterDarwinExternalTextureMetal.mm.

                              {
  if ([_externalTexture respondsToSelector:@selector(onTextureUnregistered:)]) {
    [_externalTexture onTextureUnregistered:_externalTexture];
  }
}

paintContext:bounds:freeze:sampling:

- (void) paintContext:		(flutter::Texture::PaintContext&)	context
bounds:		(const SkRect&)	bounds
freeze:		(BOOL)	freeze
sampling:		(const flutter::DlImageSampling)	sampling

Definition at line 37 of file FlutterDarwinExternalTextureMetal.mm.

                    :(flutter::Texture::PaintContext&)context
              bounds:(const SkRect&)bounds
              freeze:(BOOL)freeze
            sampling:(const flutter::DlImageSampling)sampling {
  const bool needsUpdatedTexture = (!freeze && _textureFrameAvailable) || !_externalImage;
 
  if (needsUpdatedTexture) {
    [self onNeedsUpdatedTexture:context];
  }
 
  if (_externalImage) {
    context.canvas->DrawImageRect(
        _externalImage,                                      // image
        flutter::DlRect::Make(_externalImage->GetBounds()),  // source rect
        flutter::ToDlRect(bounds),                           // destination rect
        sampling,                                            // sampling
        context.paint,                                       // paint
        flutter::DlSrcRectConstraint::kStrict                // enforce edges
    );
  }
}

Property Documentation

textureID

- (int64_t) textureID

readnonatomicassign

Definition at line 65 of file FlutterDarwinExternalTextureMetal.h.

---

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

• shell/platform/darwin/graphics/FlutterDarwinExternalTextureMetal.h
• shell/platform/darwin/graphics/FlutterDarwinExternalTextureMetal.mm