The Tor Browser: gfx/skia/trunk/src/gpu/GrGpu.h@129ffea94266 (annotated)

gfx/skia/trunk/src/gpu/GrGpu.h@129ffea94266 (annotated)

gfx/skia/trunk/src/gpu/GrGpu.h

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef GrGpu_DEFINED
 #define GrGpu_DEFINED
 #include "GrDrawTarget.h"
 #include "GrClipMaskManager.h"
 #include "SkPath.h"
 class GrContext;
 class GrIndexBufferAllocPool;
 class GrPath;
 class GrPathRenderer;
 class GrPathRendererChain;
 class GrResource;
 class GrStencilBuffer;
 class GrVertexBufferAllocPool;
 class GrGpu : public GrDrawTarget {
 public:
     /**
      * Additional blend coefficients for dual source blending, not exposed
      * through GrPaint/GrContext.
      */
     enum ExtendedBlendCoeffs {
         // source 2 refers to second output color when
         // using dual source blending.
         kS2C_GrBlendCoeff = kPublicGrBlendCoeffCount,
         kIS2C_GrBlendCoeff,
         kS2A_GrBlendCoeff,
         kIS2A_GrBlendCoeff,
         kTotalGrBlendCoeffCount
     };
     /**
      * Create an instance of GrGpu that matches the specified backend. If the requested backend is
      * not supported (at compile-time or run-time) this returns NULL. The context will not be
      * fully constructed and should not be used by GrGpu until after this function returns.
      */
     static GrGpu* Create(GrBackend, GrBackendContext, GrContext* context);
     ////////////////////////////////////////////////////////////////////////////
     GrGpu(GrContext* context);
     virtual ~GrGpu();
     GrContext* getContext() { return this->INHERITED::getContext(); }
     const GrContext* getContext() const { return this->INHERITED::getContext(); }
     /**
      * The GrGpu object normally assumes that no outsider is setting state
      * within the underlying 3D API's context/device/whatever. This call informs
      * the GrGpu that the state was modified and it shouldn't make assumptions
      * about the state.
      */
     void markContextDirty(uint32_t state = kAll_GrBackendState) {
         fResetBits |= state;
     }
     void unimpl(const char[]);
     /**
      * Creates a texture object. If desc width or height is not a power of
      * two but underlying API requires a power of two texture then srcData
      * will be embedded in a power of two texture. The extra width and height
      * is filled as though srcData were rendered clamped into the texture.
      *
      * If kRenderTarget_TextureFlag is specified the GrRenderTarget is
      * accessible via GrTexture::asRenderTarget(). The texture will hold a ref
      * on the render target until the texture is destroyed.
      *
      * @param desc        describes the texture to be created.
      * @param srcData     texel data to load texture. Begins with full-size
      *                    palette data for paletted textures. Contains width*
      *                    height texels. If NULL texture data is uninitialized.
      *
      * @return    The texture object if successful, otherwise NULL.
      */
     GrTexture* createTexture(const GrTextureDesc& desc,
                              const void* srcData, size_t rowBytes);
     /**
      * Implements GrContext::wrapBackendTexture
      */
     GrTexture* wrapBackendTexture(const GrBackendTextureDesc&);
     /**
      * Implements GrContext::wrapBackendTexture
      */
     GrRenderTarget* wrapBackendRenderTarget(const GrBackendRenderTargetDesc&);
     /**
      * Creates a vertex buffer.
      *
      * @param size    size in bytes of the vertex buffer
      * @param dynamic hints whether the data will be frequently changed
      *                by either GrVertexBuffer::lock or
      *                GrVertexBuffer::updateData.
      *
      * @return    The vertex buffer if successful, otherwise NULL.
      */
     GrVertexBuffer* createVertexBuffer(size_t size, bool dynamic);
     /**
      * Creates an index buffer.
      *
      * @param size    size in bytes of the index buffer
      * @param dynamic hints whether the data will be frequently changed
      *                by either GrIndexBuffer::lock or
      *                GrIndexBuffer::updateData.
      *
      * @return The index buffer if successful, otherwise NULL.
      */
     GrIndexBuffer* createIndexBuffer(size_t size, bool dynamic);
     /**
      * Creates a path object that can be stenciled using stencilPath(). It is
      * only legal to call this if the caps report support for path stenciling.
      */
     GrPath* createPath(const SkPath& path, const SkStrokeRec& stroke);
     /**
      * Returns an index buffer that can be used to render quads.
      * Six indices per quad: 0, 1, 2, 0, 2, 3, etc.
      * The max number of quads can be queried using GrIndexBuffer::maxQuads().
      * Draw with kTriangles_GrPrimitiveType
      * @ return the quad index buffer
      */
     const GrIndexBuffer* getQuadIndexBuffer() const;
     /**
      * Resolves MSAA.
      */
     void resolveRenderTarget(GrRenderTarget* target);
     /**
      * Ensures that the current render target is actually set in the
      * underlying 3D API. Used when client wants to use 3D API to directly
      * render to the RT.
      */
     void forceRenderTargetFlush();
     /**
      * Gets a preferred 8888 config to use for writing/reading pixel data to/from a surface with
      * config surfaceConfig. The returned config must have at least as many bits per channel as the
      * readConfig or writeConfig param.
      */
     virtual GrPixelConfig preferredReadPixelsConfig(GrPixelConfig readConfig,
                                                     GrPixelConfig surfaceConfig) const {
         return readConfig;
     }
     virtual GrPixelConfig preferredWritePixelsConfig(GrPixelConfig writeConfig,
                                                      GrPixelConfig surfaceConfig) const {
         return writeConfig;
     }
     /**
      * Called before uploading writing pixels to a GrTexture when the src pixel config doesn't
      * match the texture's config.
      */
     virtual bool canWriteTexturePixels(const GrTexture*, GrPixelConfig srcConfig) const = 0;
     /**
      * OpenGL's readPixels returns the result bottom-to-top while the skia
      * API is top-to-bottom. Thus we have to do a y-axis flip. The obvious
      * solution is to have the subclass do the flip using either the CPU or GPU.
      * However, the caller (GrContext) may have transformations to apply and can
      * simply fold in the y-flip for free. On the other hand, the subclass may
      * be able to do it for free itself. For example, the subclass may have to
      * do memcpys to handle rowBytes that aren't tight. It could do the y-flip
      * concurrently.
      *
      * This function returns true if a y-flip is required to put the pixels in
      * top-to-bottom order and the subclass cannot do it for free.
      *
      * See read pixels for the params
      * @return true if calling readPixels with the same set of params will
      *              produce bottom-to-top data
      */
      virtual bool readPixelsWillPayForYFlip(GrRenderTarget* renderTarget,
                                             int left, int top,
                                             int width, int height,
                                             GrPixelConfig config,
                                             size_t rowBytes) const = 0;
      /**
       * This should return true if reading a NxM rectangle of pixels from a
       * render target is faster if the target has dimensons N and M and the read
       * rectangle has its top-left at 0,0.
       */
      virtual bool fullReadPixelsIsFasterThanPartial() const { return false; };
     /**
      * Reads a rectangle of pixels from a render target.
      *
      * @param renderTarget  the render target to read from. NULL means the
      *                      current render target.
      * @param left          left edge of the rectangle to read (inclusive)
      * @param top           top edge of the rectangle to read (inclusive)
      * @param width         width of rectangle to read in pixels.
      * @param height        height of rectangle to read in pixels.
      * @param config        the pixel config of the destination buffer
      * @param buffer        memory to read the rectangle into.
      * @param rowBytes      the number of bytes between consecutive rows. Zero
      *                      means rows are tightly packed.
      * @param invertY       buffer should be populated bottom-to-top as opposed
      *                      to top-to-bottom (skia's usual order)
      *
      * @return true if the read succeeded, false if not. The read can fail
      *              because of a unsupported pixel config or because no render
      *              target is currently set.
      */
     bool readPixels(GrRenderTarget* renderTarget,
                     int left, int top, int width, int height,
                     GrPixelConfig config, void* buffer, size_t rowBytes);
     /**
      * Updates the pixels in a rectangle of a texture.
      *
      * @param left          left edge of the rectangle to write (inclusive)
      * @param top           top edge of the rectangle to write (inclusive)
      * @param width         width of rectangle to write in pixels.
      * @param height        height of rectangle to write in pixels.
      * @param config        the pixel config of the source buffer
      * @param buffer        memory to read pixels from
      * @param rowBytes      number of bytes between consecutive rows. Zero
      *                      means rows are tightly packed.
      */
     bool writeTexturePixels(GrTexture* texture,
                             int left, int top, int width, int height,
                             GrPixelConfig config, const void* buffer,
                             size_t rowBytes);
     /**
      * Called to tell Gpu object that all GrResources have been lost and should
      * be abandoned. Overrides must call INHERITED::abandonResources().
      */
     virtual void abandonResources();
     /**
      * Called to tell Gpu object to release all GrResources. Overrides must call
      * INHERITED::releaseResources().
      */
     void releaseResources();
     /**
      * Add resource to list of resources. Should only be called by GrResource.
      * @param resource  the resource to add.
      */
     void insertResource(GrResource* resource);
     /**
      * Remove resource from list of resources. Should only be called by
      * GrResource.
      * @param resource  the resource to remove.
      */
     void removeResource(GrResource* resource);
     // GrDrawTarget overrides
     virtual void clear(const SkIRect* rect,
                        GrColor color,
                        bool canIgnoreRect,
                        GrRenderTarget* renderTarget = NULL) SK_OVERRIDE;
     virtual void purgeResources() SK_OVERRIDE {
         // The clip mask manager can rebuild all its clip masks so just
         // get rid of them all.
         fClipMaskManager.releaseResources();
     }
     // After the client interacts directly with the 3D context state the GrGpu
     // must resync its internal state and assumptions about 3D context state.
     // Each time this occurs the GrGpu bumps a timestamp.
     // state of the 3D context
     // At 10 resets / frame and 60fps a 64bit timestamp will overflow in about
     // a billion years.
     typedef uint64_t ResetTimestamp;
     // This timestamp is always older than the current timestamp
     static const ResetTimestamp kExpiredTimestamp = 0;
     // Returns a timestamp based on the number of times the context was reset.
     // This timestamp can be used to lazily detect when cached 3D context state
     // is dirty.
     ResetTimestamp getResetTimestamp() const {
         return fResetTimestamp;
     }
     /**
      * These methods are called by the clip manager's setupClipping function
      * which (called as part of GrGpu's implementation of onDraw and
      * onStencilPath member functions.) The GrGpu subclass should flush the
      * stencil state to the 3D API in its implementation of flushGraphicsState.
      */
     void enableScissor(const SkIRect& rect) {
         fScissorState.fEnabled = true;
         fScissorState.fRect = rect;
     }
     void disableScissor() { fScissorState.fEnabled = false; }
     /**
      * Like the scissor methods above this is called by setupClipping and
      * should be flushed by the GrGpu subclass in flushGraphicsState. These
      * stencil settings should be used in place of those on the GrDrawState.
      * They have been adjusted to account for any interactions between the
      * GrDrawState's stencil settings and stencil clipping.
      */
     void setStencilSettings(const GrStencilSettings& settings) {
         fStencilSettings = settings;
     }
     void disableStencil() { fStencilSettings.setDisabled(); }
     // GrGpu subclass sets clip bit in the stencil buffer. The subclass is
     // free to clear the remaining bits to zero if masked clears are more
     // expensive than clearing all bits.
     virtual void clearStencilClip(const SkIRect& rect, bool insideClip) = 0;
     enum PrivateDrawStateStateBits {
         kFirstBit = (GrDrawState::kLastPublicStateBit << 1),
         kModifyStencilClip_StateBit = kFirstBit, // allows draws to modify
                                                  // stencil bits used for
                                                  // clipping.
     };
     void getPathStencilSettingsForFillType(SkPath::FillType fill, GrStencilSettings* outStencilSettings);
 protected:
     enum DrawType {
         kDrawPoints_DrawType,
         kDrawLines_DrawType,
         kDrawTriangles_DrawType,
         kStencilPath_DrawType,
         kDrawPath_DrawType,
     };
     DrawType PrimTypeToDrawType(GrPrimitiveType type) {
         switch (type) {
             case kTriangles_GrPrimitiveType:
             case kTriangleStrip_GrPrimitiveType:
             case kTriangleFan_GrPrimitiveType:
                 return kDrawTriangles_DrawType;
             case kPoints_GrPrimitiveType:
                 return kDrawPoints_DrawType;
             case kLines_GrPrimitiveType:
             case kLineStrip_GrPrimitiveType:
                 return kDrawLines_DrawType;
             default:
                 GrCrash("Unexpected primitive type");
                 return kDrawTriangles_DrawType;
         }
     }
     // prepares clip flushes gpu state before a draw
     bool setupClipAndFlushState(DrawType,
                                 const GrDeviceCoordTexture* dstCopy,
                                 GrDrawState::AutoRestoreEffects* are,
                                 const SkRect* devBounds);
     // Functions used to map clip-respecting stencil tests into normal
     // stencil funcs supported by GPUs.
     static GrStencilFunc ConvertStencilFunc(bool stencilInClip,
                                             GrStencilFunc func);
     static void ConvertStencilFuncAndMask(GrStencilFunc func,
                                           bool clipInStencil,
                                           unsigned int clipBit,
                                           unsigned int userBits,
                                           unsigned int* ref,
                                           unsigned int* mask);
     GrClipMaskManager           fClipMaskManager;
     struct GeometryPoolState {
         const GrVertexBuffer* fPoolVertexBuffer;
         int                   fPoolStartVertex;
         const GrIndexBuffer*  fPoolIndexBuffer;
         int                   fPoolStartIndex;
     };
     const GeometryPoolState& getGeomPoolState() {
         return fGeomPoolStateStack.back();
     }
     // The state of the scissor is controlled by the clip manager
     struct ScissorState {
         bool    fEnabled;
         SkIRect fRect;
     } fScissorState;
     // The final stencil settings to use as determined by the clip manager.
     GrStencilSettings fStencilSettings;
     // Helpers for setting up geometry state
     void finalizeReservedVertices();
     void finalizeReservedIndices();
 private:
     // GrDrawTarget overrides
     virtual bool onReserveVertexSpace(size_t vertexSize, int vertexCount, void** vertices) SK_OVERRIDE;
     virtual bool onReserveIndexSpace(int indexCount, void** indices) SK_OVERRIDE;
     virtual void releaseReservedVertexSpace() SK_OVERRIDE;
     virtual void releaseReservedIndexSpace() SK_OVERRIDE;
     virtual void onSetVertexSourceToArray(const void* vertexArray, int vertexCount) SK_OVERRIDE;
     virtual void onSetIndexSourceToArray(const void* indexArray, int indexCount) SK_OVERRIDE;
     virtual void releaseVertexArray() SK_OVERRIDE;
     virtual void releaseIndexArray() SK_OVERRIDE;
     virtual void geometrySourceWillPush() SK_OVERRIDE;
     virtual void geometrySourceWillPop(const GeometrySrcState& restoredState) SK_OVERRIDE;
     // called when the 3D context state is unknown. Subclass should emit any
     // assumed 3D context state and dirty any state cache.
     virtual void onResetContext(uint32_t resetBits) = 0;
     // overridden by backend-specific derived class to create objects.
     virtual GrTexture* onCreateTexture(const GrTextureDesc& desc,
                                        const void* srcData,
                                        size_t rowBytes) = 0;
     virtual GrTexture* onWrapBackendTexture(const GrBackendTextureDesc&) = 0;
     virtual GrRenderTarget* onWrapBackendRenderTarget(const GrBackendRenderTargetDesc&) = 0;
     virtual GrVertexBuffer* onCreateVertexBuffer(size_t size, bool dynamic) = 0;
     virtual GrIndexBuffer* onCreateIndexBuffer(size_t size, bool dynamic) = 0;
     virtual GrPath* onCreatePath(const SkPath& path, const SkStrokeRec&) = 0;
     // overridden by backend-specific derived class to perform the clear and
     // clearRect. NULL rect means clear whole target. If canIgnoreRect is
     // true, it is okay to perform a full clear instead of a partial clear
     virtual void onClear(const SkIRect* rect, GrColor color, bool canIgnoreRect) = 0;
     // overridden by backend-specific derived class to perform the draw call.
     virtual void onGpuDraw(const DrawInfo&) = 0;
     // overridden by backend-specific derived class to perform the path stenciling.
     virtual void onGpuStencilPath(const GrPath*, SkPath::FillType) = 0;
     virtual void onGpuDrawPath(const GrPath*, SkPath::FillType) = 0;
     // overridden by backend-specific derived class to perform flush
     virtual void onForceRenderTargetFlush() = 0;
     // overridden by backend-specific derived class to perform the read pixels.
     virtual bool onReadPixels(GrRenderTarget* target,
                               int left, int top, int width, int height,
                               GrPixelConfig,
                               void* buffer,
                               size_t rowBytes) = 0;
     // overridden by backend-specific derived class to perform the texture update
     virtual bool onWriteTexturePixels(GrTexture* texture,
                                       int left, int top, int width, int height,
                                       GrPixelConfig config, const void* buffer,
                                       size_t rowBytes) = 0;
     // overridden by backend-specific derived class to perform the resolve
     virtual void onResolveRenderTarget(GrRenderTarget* target) = 0;
     // width and height may be larger than rt (if underlying API allows it).
     // Should attach the SB to the RT. Returns false if compatible sb could
     // not be created.
     virtual bool createStencilBufferForRenderTarget(GrRenderTarget*, int width, int height) = 0;
     // attaches an existing SB to an existing RT.
     virtual bool attachStencilBufferToRenderTarget(GrStencilBuffer*, GrRenderTarget*) = 0;
     // The GrGpu typically records the clients requested state and then flushes
     // deltas from previous state at draw time. This function does the
     // backend-specific flush of the state.
     // returns false if current state is unsupported.
     virtual bool flushGraphicsState(DrawType, const GrDeviceCoordTexture* dstCopy) = 0;
     // clears the entire stencil buffer to 0
     virtual void clearStencil() = 0;
     // Given a rt, find or create a stencil buffer and attach it
     bool attachStencilBufferToRenderTarget(GrRenderTarget* target);
     // GrDrawTarget overrides
     virtual void onDraw(const DrawInfo&) SK_OVERRIDE;
     virtual void onStencilPath(const GrPath*, SkPath::FillType) SK_OVERRIDE;
     virtual void onDrawPath(const GrPath*, SkPath::FillType,
                             const GrDeviceCoordTexture* dstCopy) SK_OVERRIDE;
     // readies the pools to provide vertex/index data.
     void prepareVertexPool();
     void prepareIndexPool();
     void resetContext() {
         // We call this because the client may have messed with the
         // stencil buffer. Perhaps we should detect whether it is a
         // internally created stencil buffer and if so skip the invalidate.
         fClipMaskManager.invalidateStencilMask();
         this->onResetContext(fResetBits);
         fResetBits = 0;
         ++fResetTimestamp;
     }
     void handleDirtyContext() {
         if (fResetBits) {
             this->resetContext();
         }
     }
     enum {
         kPreallocGeomPoolStateStackCnt = 4,
     };
     typedef SkTInternalLList<GrResource> ResourceList;
     SkSTArray<kPreallocGeomPoolStateStackCnt, GeometryPoolState, true>  fGeomPoolStateStack;
     ResetTimestamp                                                      fResetTimestamp;
     uint32_t                                                            fResetBits;
     GrVertexBufferAllocPool*                                            fVertexPool;
     GrIndexBufferAllocPool*                                             fIndexPool;
     // counts number of uses of vertex/index pool in the geometry stack
     int                                                                 fVertexPoolUseCnt;
     int                                                                 fIndexPoolUseCnt;
     // these are mutable so they can be created on-demand
     mutable GrIndexBuffer*                                              fQuadIndexBuffer;
     // Used to abandon/release all resources created by this GrGpu. TODO: Move this
     // functionality to GrResourceCache.
     ResourceList                                                        fResourceList;
     typedef GrDrawTarget INHERITED;
 };
 #endif

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gfx/skia/trunk/src/gpu/GrGpu.h@129ffea94266 (annotated)

gfx/skia/trunk/src/gpu/GrGpu.h