kc3-lang/angle/src/libANGLE/renderer/wgpu/RenderTargetWgpu.h

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• Hash : 243ebfa7
  Author :
  Date : 2025-06-16T16:07:06
  

  WebGPU: Allow glReadPixels from non-base mip levels.
  
  Before, the WebGPU backend always read from the base level
  of the texture attached to the current framebuffer.
  
  Bug: angleproject:42267090
  Change-Id: Ibe5b8575f6fa90c1942ba566485b6175ee10f808
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6634558
  Commit-Queue: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Auto-Submit: Matthew Denton <mpdenton@chromium.org>
  

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• src/libANGLE/renderer/wgpu/RenderTargetWgpu.h

• //
  // Copyright 2024 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  // RenderTargetWgpu.h:
  //    Defines the class interface for RenderTargetWgpu.
  //
  
  #ifndef LIBANGLE_RENDERER_WGPU_RENDERTARGETWGPU_H_
  #define LIBANGLE_RENDERER_WGPU_RENDERTARGETWGPU_H_
  
  #include <stdint.h>
  #include <webgpu/webgpu.h>
  
  #include "libANGLE/FramebufferAttachment.h"
  #include "libANGLE/angletypes.h"
  #include "libANGLE/renderer/wgpu/wgpu_helpers.h"
  #include "libANGLE/renderer/wgpu/wgpu_utils.h"
  
  namespace rx
  {
  class RenderTargetWgpu final : public FramebufferAttachmentRenderTarget
  {
    public:
      RenderTargetWgpu();
      ~RenderTargetWgpu() override;
  
      // Used in std::vector initialization.
      RenderTargetWgpu(RenderTargetWgpu &&other);
  
      void set(webgpu::ImageHelper *image,
               const webgpu::TextureViewHandle &texture,
               const webgpu::LevelIndex level,
               uint32_t layer,
               WGPUTextureFormat format);
      void reset();
  
      angle::Result flushImageStagedUpdates(ContextWgpu *contextWgpu,
                                            webgpu::ClearValuesArray *deferredClears,
                                            uint32_t deferredClearIndex);
  
      webgpu::TextureViewHandle getTextureView() { return mTextureView; }
      webgpu::ImageHelper *getImage() { return mImage; }
      webgpu::LevelIndex getLevelIndex() const { return mLevelIndex; }
      uint32_t getLayer() const { return mLayerIndex; }
      gl::LevelIndex getGlLevel() const { return mImage->toGlLevel(mLevelIndex); }
  
    private:
      webgpu::ImageHelper *mImage = nullptr;
      // TODO(liza): move TextureView into ImageHelper.
      webgpu::TextureViewHandle mTextureView;
      webgpu::LevelIndex mLevelIndex{0};
      uint32_t mLayerIndex               = 0;
      const WGPUTextureFormat *mFormat   = nullptr;
  };
  }  // namespace rx
  
  #endif  // LIBANGLE_RENDERER_WGPU_RENDERTARGETWGPU_H_
  

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