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

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• Hash : 96c9f065
  Author :
  Date : 2025-05-15T19:22:29
  

  WGPU: Flip y for the default framebuffer
  
  Bug: angleproject:389145696
  Change-Id: I0d527ad3dc24dbca7e9d914b03edacdc257a568f
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6477137
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Commit-Queue: Matthew Denton <mpdenton@chromium.org>
  

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• src/libANGLE/renderer/wgpu/FramebufferWgpu.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.
  //
  // FramebufferWgpu.h:
  //    Defines the class interface for FramebufferWgpu, implementing FramebufferImpl.
  //
  
  #ifndef LIBANGLE_RENDERER_WGPU_FRAMEBUFFERWGPU_H_
  #define LIBANGLE_RENDERER_WGPU_FRAMEBUFFERWGPU_H_
  
  #include "libANGLE/renderer/FramebufferImpl.h"
  #include "libANGLE/renderer/RenderTargetCache.h"
  #include "libANGLE/renderer/wgpu/RenderTargetWgpu.h"
  #include "libANGLE/renderer/wgpu/wgpu_utils.h"
  
  namespace rx
  {
  
  class FramebufferWgpu : public FramebufferImpl
  {
    public:
      FramebufferWgpu(const gl::FramebufferState &state);
      ~FramebufferWgpu() override;
  
      angle::Result discard(const gl::Context *context,
                            size_t count,
                            const GLenum *attachments) override;
      angle::Result invalidate(const gl::Context *context,
                               size_t count,
                               const GLenum *attachments) override;
      angle::Result invalidateSub(const gl::Context *context,
                                  size_t count,
                                  const GLenum *attachments,
                                  const gl::Rectangle &area) override;
  
      angle::Result clear(const gl::Context *context, GLbitfield mask) override;
      angle::Result clearBufferfv(const gl::Context *context,
                                  GLenum buffer,
                                  GLint drawbuffer,
                                  const GLfloat *values) override;
      angle::Result clearBufferuiv(const gl::Context *context,
                                   GLenum buffer,
                                   GLint drawbuffer,
                                   const GLuint *values) override;
      angle::Result clearBufferiv(const gl::Context *context,
                                  GLenum buffer,
                                  GLint drawbuffer,
                                  const GLint *values) override;
      angle::Result clearBufferfi(const gl::Context *context,
                                  GLenum buffer,
                                  GLint drawbuffer,
                                  GLfloat depth,
                                  GLint stencil) override;
  
      angle::Result readPixels(const gl::Context *context,
                               const gl::Rectangle &area,
                               GLenum format,
                               GLenum type,
                               const gl::PixelPackState &pack,
                               gl::Buffer *packBuffer,
                               void *pixels) override;
  
      angle::Result blit(const gl::Context *context,
                         const gl::Rectangle &sourceArea,
                         const gl::Rectangle &destArea,
                         GLbitfield mask,
                         GLenum filter) override;
  
      gl::FramebufferStatus checkStatus(const gl::Context *context) const override;
  
      angle::Result syncState(const gl::Context *context,
                              GLenum binding,
                              const gl::Framebuffer::DirtyBits &dirtyBits,
                              gl::Command command) override;
  
      angle::Result getSamplePosition(const gl::Context *context,
                                      size_t index,
                                      GLfloat *xy) const override;
  
      RenderTargetWgpu *getReadPixelsRenderTarget() const;
  
      void addNewColorAttachments(
          std::vector<webgpu::PackedRenderPassColorAttachment> newColorAttachments);
  
      void updateDepthStencilAttachment(
          webgpu::PackedRenderPassDepthStencilAttachment newRenderPassDepthStencilAttachment);
  
      angle::Result flushOneColorAttachmentUpdate(const gl::Context *context,
                                                  bool deferClears,
                                                  uint32_t colorIndexGL);
  
      angle::Result flushAttachmentUpdates(const gl::Context *context,
                                           gl::DrawBufferMask dirtyColorAttachments,
                                           bool dirtyDepthStencilAttachment,
                                           bool deferColorClears,
                                           bool deferDepthStencilClears);
  
      angle::Result flushDeferredClears(ContextWgpu *contextWgpu);
  
      // Starts a new render pass iff there are new color and/or depth/stencil attachments.
      angle::Result startRenderPassNewAttachments(ContextWgpu *contextWgpu);
  
      angle::Result startNewRenderPass(ContextWgpu *contextWgpu);
  
      // WGPU's Framebuffer coordinates are Y down. OpenGL's are Y up. This corrects the coordinates
      // of the read area based on the currently active RenderTarget.
      gl::Rectangle getReadArea(const gl::Context *context, const gl::Rectangle &glArea) const;
  
      const gl::DrawBuffersArray<WGPUTextureFormat> &getCurrentColorAttachmentFormats() const
      {
          return mCurrentColorAttachmentFormats;
      }
  
      WGPUTextureFormat getCurrentDepthStencilAttachmentFormat() const
      {
          return mCurrentDepthStencilFormat;
      }
  
      void setFlipY(bool flipY) { mFlipY = flipY; }
      bool flipY() const { return mFlipY; }
  
    private:
      void mergeClearWithDeferredClears(const gl::ColorF &clearValue,
                                        gl::DrawBufferMask clearColorBuffers,
                                        float depthValue,
                                        uint32_t stencilValue,
                                        bool clearColor,
                                        bool clearDepth,
                                        bool clearStencil);
  
      RenderTargetCache<RenderTargetWgpu> mRenderTargetCache;
      webgpu::PackedRenderPassDescriptor mCurrentRenderPassDesc;
  
      gl::DrawBuffersArray<WGPUTextureFormat> mCurrentColorAttachmentFormats;
      WGPUTextureFormat mCurrentDepthStencilFormat = WGPUTextureFormat_Undefined;
  
      // Secondary descriptor to track new clears that are added and should be run in a new render
      // pass during flushColorAttachmentUpdates.
      std::optional<webgpu::PackedRenderPassDescriptor> mNewRenderPassDesc;
  
      webgpu::ClearValuesArray mDeferredClears;
  
      // Whether this framebuffer should be rendered to with a negated y coordinate.
      bool mFlipY = false;
  };
  
  }  // namespace rx
  
  #endif  // LIBANGLE_RENDERER_WGPU_FRAMEBUFFERWGPU_H_
  

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