kc3-lang/angle/src/libANGLE/Framebuffer.h

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• Hash : 05b35b21
  Author :
  Date : 2017-10-03T09:01:44
  

  D3D11: Lazy robust resource init.
  
  This patch moves the robust resource init logic to the GL front-end.
  Instead of initializing texture resources immediately on creation in
  D3D11, it defers the clear until before a draw call in some cases, or
  skips the update if we can determine if a texture (or other resource)
  has been fully initialized.
  
  Currently lazy init is only implemented for Textures, Renderbuffers,
  and Surfaces.
  
  Various places where lazy resource init is triggered:
  * Framebuffer operations (Draw, Blit, CopyTexImage, Clear, ReadPixels)
  * Texture operations (SubImage, GenerateMipmap, CopyTexImage)
  
  Some efficiency gains remain to be implemented, such as when a
  SubImage call fills the entire object. Similarly for Blit, and a few
  other operations. In these cases we can skip lazy init as an
  optimization. Edge cases with EGLImage are mostly untested.
  
  BUG=angleproject:2107
  
  Change-Id: I2bf3a69b1eae0d4feeb5b17daca23451f1037be8
  Reviewed-on: https://chromium-review.googlesource.com/576058
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  

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• src/libANGLE/Framebuffer.h

• //
  // Copyright (c) 2002-2013 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.
  //
  
  // Framebuffer.h: Defines the gl::Framebuffer class. Implements GL framebuffer
  // objects and related functionality. [OpenGL ES 2.0.24] section 4.4 page 105.
  
  #ifndef LIBANGLE_FRAMEBUFFER_H_
  #define LIBANGLE_FRAMEBUFFER_H_
  
  #include <vector>
  
  #include "common/Optional.h"
  #include "common/angleutils.h"
  #include "libANGLE/Constants.h"
  #include "libANGLE/Debug.h"
  #include "libANGLE/Error.h"
  #include "libANGLE/FramebufferAttachment.h"
  #include "libANGLE/RefCountObject.h"
  #include "libANGLE/signal_utils.h"
  
  namespace rx
  {
  class GLImplFactory;
  class FramebufferImpl;
  class RenderbufferImpl;
  class SurfaceImpl;
  }
  
  namespace egl
  {
  class Display;
  class Surface;
  }
  
  namespace gl
  {
  class Context;
  class ContextState;
  class Framebuffer;
  class Renderbuffer;
  class State;
  class Texture;
  class TextureCapsMap;
  class ValidationContext;
  struct Caps;
  struct Extensions;
  struct ImageIndex;
  struct Rectangle;
  
  class FramebufferState final : angle::NonCopyable
  {
    public:
      FramebufferState();
      explicit FramebufferState(const Caps &caps);
      ~FramebufferState();
  
      const std::string &getLabel();
      size_t getReadIndex() const;
  
      const FramebufferAttachment *getAttachment(GLenum attachment) const;
      const FramebufferAttachment *getReadAttachment() const;
      const FramebufferAttachment *getFirstNonNullAttachment() const;
      const FramebufferAttachment *getFirstColorAttachment() const;
      const FramebufferAttachment *getDepthOrStencilAttachment() const;
      const FramebufferAttachment *getStencilOrDepthStencilAttachment() const;
      const FramebufferAttachment *getColorAttachment(size_t colorAttachment) const;
      const FramebufferAttachment *getDepthAttachment() const;
      const FramebufferAttachment *getStencilAttachment() const;
      const FramebufferAttachment *getDepthStencilAttachment() const;
  
      const std::vector<GLenum> &getDrawBufferStates() const { return mDrawBufferStates; }
      DrawBufferMask getEnabledDrawBuffers() const { return mEnabledDrawBuffers; }
      GLenum getReadBufferState() const { return mReadBufferState; }
      const std::vector<FramebufferAttachment> &getColorAttachments() const
      {
          return mColorAttachments;
      }
  
      bool attachmentsHaveSameDimensions() const;
      bool colorAttachmentsAreUniqueImages() const;
      Box getDimensions() const;
  
      const FramebufferAttachment *getDrawBuffer(size_t drawBufferIdx) const;
      size_t getDrawBufferCount() const;
  
      GLint getDefaultWidth() const { return mDefaultWidth; };
      GLint getDefaultHeight() const { return mDefaultHeight; };
      GLint getDefaultSamples() const { return mDefaultSamples; };
      GLboolean getDefaultFixedSampleLocations() const { return mDefaultFixedSampleLocations; };
  
      bool hasDepth() const;
      bool hasStencil() const;
  
      GLenum getMultiviewLayout() const;
      GLsizei getNumViews() const;
      const std::vector<Offset> *getViewportOffsets() const;
      GLint getBaseViewIndex() const;
  
    private:
      friend class Framebuffer;
  
      std::string mLabel;
  
      std::vector<FramebufferAttachment> mColorAttachments;
      FramebufferAttachment mDepthAttachment;
      FramebufferAttachment mStencilAttachment;
  
      std::vector<GLenum> mDrawBufferStates;
      GLenum mReadBufferState;
      DrawBufferMask mEnabledDrawBuffers;
  
      GLint mDefaultWidth;
      GLint mDefaultHeight;
      GLint mDefaultSamples;
      GLboolean mDefaultFixedSampleLocations;
  
      // It's necessary to store all this extra state so we can restore attachments
      // when DEPTH_STENCIL/DEPTH/STENCIL is unbound in WebGL 1.
      FramebufferAttachment mWebGLDepthStencilAttachment;
      FramebufferAttachment mWebGLDepthAttachment;
      FramebufferAttachment mWebGLStencilAttachment;
      bool mWebGLDepthStencilConsistent;
  
      // Tracks if we need to initialize the resources for each attachment.
      angle::BitSet<IMPLEMENTATION_MAX_FRAMEBUFFER_ATTACHMENTS + 2> mResourceNeedsInit;
  };
  
  class Framebuffer final : public LabeledObject, public OnAttachmentDirtyReceiver
  {
    public:
      // Constructor to build application-defined framebuffers
      Framebuffer(const Caps &caps, rx::GLImplFactory *factory, GLuint id);
      // Constructor to build default framebuffers for a surface
      Framebuffer(const egl::Display *display, egl::Surface *surface);
      // Constructor to build a fake default framebuffer when surfaceless
      Framebuffer(rx::GLImplFactory *factory);
  
      virtual ~Framebuffer();
      void onDestroy(const Context *context);
      void destroyDefault(const egl::Display *display);
  
      void setLabel(const std::string &label) override;
      const std::string &getLabel() const override;
  
      rx::FramebufferImpl *getImplementation() const { return mImpl; }
  
      GLuint id() const { return mId; }
  
      void setAttachment(const Context *context,
                         GLenum type,
                         GLenum binding,
                         const ImageIndex &textureIndex,
                         FramebufferAttachmentObject *resource);
      void setAttachmentMultiviewLayered(const Context *context,
                                         GLenum type,
                                         GLenum binding,
                                         const ImageIndex &textureIndex,
                                         FramebufferAttachmentObject *resource,
                                         GLsizei numViews,
                                         GLint baseViewIndex);
      void setAttachmentMultiviewSideBySide(const Context *context,
                                            GLenum type,
                                            GLenum binding,
                                            const ImageIndex &textureIndex,
                                            FramebufferAttachmentObject *resource,
                                            GLsizei numViews,
                                            const GLint *viewportOffsets);
      void resetAttachment(const Context *context, GLenum binding);
  
      bool detachTexture(const Context *context, GLuint texture);
      bool detachRenderbuffer(const Context *context, GLuint renderbuffer);
  
      const FramebufferAttachment *getColorbuffer(size_t colorAttachment) const;
      const FramebufferAttachment *getDepthbuffer() const;
      const FramebufferAttachment *getStencilbuffer() const;
      const FramebufferAttachment *getDepthStencilBuffer() const;
      const FramebufferAttachment *getDepthOrStencilbuffer() const;
      const FramebufferAttachment *getStencilOrDepthStencilAttachment() const;
      const FramebufferAttachment *getReadColorbuffer() const;
      GLenum getReadColorbufferType() const;
      const FramebufferAttachment *getFirstColorbuffer() const;
      const FramebufferAttachment *getFirstNonNullAttachment() const;
  
      const FramebufferAttachment *getAttachment(GLenum attachment) const;
      GLenum getMultiviewLayout() const;
      GLsizei getNumViews() const;
      GLint getBaseViewIndex() const;
      const std::vector<Offset> *getViewportOffsets() const;
  
      size_t getDrawbufferStateCount() const;
      GLenum getDrawBufferState(size_t drawBuffer) const;
      const std::vector<GLenum> &getDrawBufferStates() const;
      void setDrawBuffers(size_t count, const GLenum *buffers);
      const FramebufferAttachment *getDrawBuffer(size_t drawBuffer) const;
      GLenum getDrawbufferWriteType(size_t drawBuffer) const;
      bool hasEnabledDrawBuffer() const;
  
      GLenum getReadBufferState() const;
      void setReadBuffer(GLenum buffer);
  
      size_t getNumColorBuffers() const;
      bool hasDepth() const;
      bool hasStencil() const;
  
      bool usingExtendedDrawBuffers() const;
  
      // This method calls checkStatus.
      int getSamples(const Context *context);
  
      Error getSamplePosition(size_t index, GLfloat *xy) const;
  
      GLint getDefaultWidth() const;
      GLint getDefaultHeight() const;
      GLint getDefaultSamples() const;
      GLboolean getDefaultFixedSampleLocations() const;
      void setDefaultWidth(GLint defaultWidth);
      void setDefaultHeight(GLint defaultHeight);
      void setDefaultSamples(GLint defaultSamples);
      void setDefaultFixedSampleLocations(GLboolean defaultFixedSampleLocations);
  
      void invalidateCompletenessCache();
  
      GLenum checkStatus(const Context *context);
  
      // TODO(jmadill): Remove this kludge.
      GLenum checkStatus(const ValidationContext *context);
      int getSamples(const ValidationContext *context);
  
      // For when we don't want to check completeness in getSamples().
      int getCachedSamples(const Context *context);
  
      // Helper for checkStatus == GL_FRAMEBUFFER_COMPLETE.
      bool complete(const Context *context);
      bool cachedComplete() const;
  
      bool hasValidDepthStencil() const;
  
      Error discard(const Context *context, size_t count, const GLenum *attachments);
      Error invalidate(const Context *context, size_t count, const GLenum *attachments);
      Error invalidateSub(const Context *context,
                          size_t count,
                          const GLenum *attachments,
                          const gl::Rectangle &area);
  
      Error clear(const gl::Context *context, GLbitfield mask);
      Error clearBufferfv(const gl::Context *context,
                          GLenum buffer,
                          GLint drawbuffer,
                          const GLfloat *values);
      Error clearBufferuiv(const gl::Context *context,
                           GLenum buffer,
                           GLint drawbuffer,
                           const GLuint *values);
      Error clearBufferiv(const gl::Context *context,
                          GLenum buffer,
                          GLint drawbuffer,
                          const GLint *values);
      Error clearBufferfi(const gl::Context *context,
                          GLenum buffer,
                          GLint drawbuffer,
                          GLfloat depth,
                          GLint stencil);
  
      GLenum getImplementationColorReadFormat(const Context *context) const;
      GLenum getImplementationColorReadType(const Context *context) const;
      Error readPixels(const gl::Context *context,
                       const gl::Rectangle &area,
                       GLenum format,
                       GLenum type,
                       void *pixels);
  
      Error blit(const gl::Context *context,
                 const Rectangle &sourceArea,
                 const Rectangle &destArea,
                 GLbitfield mask,
                 GLenum filter);
  
      enum DirtyBitType : size_t
      {
          DIRTY_BIT_COLOR_ATTACHMENT_0,
          DIRTY_BIT_COLOR_ATTACHMENT_MAX =
              DIRTY_BIT_COLOR_ATTACHMENT_0 + gl::IMPLEMENTATION_MAX_FRAMEBUFFER_ATTACHMENTS,
          DIRTY_BIT_DEPTH_ATTACHMENT = DIRTY_BIT_COLOR_ATTACHMENT_MAX,
          DIRTY_BIT_STENCIL_ATTACHMENT,
          DIRTY_BIT_DRAW_BUFFERS,
          DIRTY_BIT_READ_BUFFER,
          DIRTY_BIT_DEFAULT_WIDTH,
          DIRTY_BIT_DEFAULT_HEIGHT,
          DIRTY_BIT_DEFAULT_SAMPLES,
          DIRTY_BIT_DEFAULT_FIXED_SAMPLE_LOCATIONS,
          DIRTY_BIT_UNKNOWN,
          DIRTY_BIT_MAX = DIRTY_BIT_UNKNOWN
      };
  
      typedef angle::BitSet<DIRTY_BIT_MAX> DirtyBits;
      bool hasAnyDirtyBit() const { return mDirtyBits.any(); }
  
      void syncState(const Context *context);
  
      // OnAttachmentChangedReceiver implementation
      void signal(size_t dirtyBit, InitState state) override;
  
      bool formsRenderingFeedbackLoopWith(const State &state) const;
      bool formsCopyingFeedbackLoopWith(GLuint copyTextureID,
                                        GLint copyTextureLevel,
                                        GLint copyTextureLayer) const;
  
      Error ensureDrawAttachmentsInitialized(const Context *context);
      Error ensureReadAttachmentInitialized(const Context *context, GLbitfield blitMask);
      Box getDimensions() const;
  
    private:
      bool detachResourceById(const Context *context, GLenum resourceType, GLuint resourceId);
      bool detachMatchingAttachment(const Context *context,
                                    FramebufferAttachment *attachment,
                                    GLenum matchType,
                                    GLuint matchId,
                                    size_t dirtyBit);
      GLenum checkStatusImpl(const Context *context);
      void setAttachment(const Context *context,
                         GLenum type,
                         GLenum binding,
                         const ImageIndex &textureIndex,
                         FramebufferAttachmentObject *resource,
                         GLsizei numViews,
                         GLuint baseViewIndex,
                         GLenum multiviewLayout,
                         const GLint *viewportOffsets);
      void commitWebGL1DepthStencilIfConsistent(const Context *context,
                                                GLsizei numViews,
                                                GLuint baseViewIndex,
                                                GLenum multiviewLayout,
                                                const GLint *viewportOffsets);
      void setAttachmentImpl(const Context *context,
                             GLenum type,
                             GLenum binding,
                             const ImageIndex &textureIndex,
                             FramebufferAttachmentObject *resource,
                             GLsizei numViews,
                             GLuint baseViewIndex,
                             GLenum multiviewLayout,
                             const GLint *viewportOffsets);
      void updateAttachment(const Context *context,
                            FramebufferAttachment *attachment,
                            size_t dirtyBit,
                            OnAttachmentDirtyBinding *onDirtyBinding,
                            GLenum type,
                            GLenum binding,
                            const ImageIndex &textureIndex,
                            FramebufferAttachmentObject *resource,
                            GLsizei numViews,
                            GLuint baseViewIndex,
                            GLenum multiviewLayout,
                            const GLint *viewportOffsets);
  
      void markDrawAttachmentsInitialized(bool color, bool depth, bool stencil);
      void markBufferInitialized(GLenum bufferType, GLint bufferIndex);
      Error ensureBufferInitialized(const Context *context, GLenum bufferType, GLint bufferIndex);
  
      // Checks that we have a partially masked clear:
      // * some color channels are masked out
      // * some stencil values are masked out
      // * scissor test partially overlaps the framebuffer
      bool partialClearNeedsInit(const Context *context, bool color, bool depth, bool stencil);
      bool partialBufferClearNeedsInit(const Context *context, GLenum bufferType);
  
      FramebufferState mState;
      rx::FramebufferImpl *mImpl;
      GLuint mId;
  
      Optional<GLenum> mCachedStatus;
      std::vector<OnAttachmentDirtyBinding> mDirtyColorAttachmentBindings;
      OnAttachmentDirtyBinding mDirtyDepthAttachmentBinding;
      OnAttachmentDirtyBinding mDirtyStencilAttachmentBinding;
  
      DirtyBits mDirtyBits;
  };
  
  }  // namespace gl
  
  #endif  // LIBANGLE_FRAMEBUFFER_H_
  

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