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

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

gfx/skia/trunk/src/gpu/GrClipMaskManager.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 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef GrClipMaskManager_DEFINED
 #define GrClipMaskManager_DEFINED
 #include "GrClipMaskCache.h"
 #include "GrContext.h"
 #include "GrDrawState.h"
 #include "GrReducedClip.h"
 #include "GrStencil.h"
 #include "GrTexture.h"
 #include "SkClipStack.h"
 #include "SkDeque.h"
 #include "SkPath.h"
 #include "SkRefCnt.h"
 #include "SkTLList.h"
 #include "SkTypes.h"
 class GrGpu;
 class GrPathRenderer;
 class GrPathRendererChain;
 class GrTexture;
 class SkPath;
 /**
  * The clip mask creator handles the generation of the clip mask. If anti
  * aliasing is requested it will (in the future) generate a single channel
  * (8bit) mask. If no anti aliasing is requested it will generate a 1-bit
  * mask in the stencil buffer. In the non anti-aliasing case, if the clip
  * mask can be represented as a rectangle then scissoring is used. In all
  * cases scissoring is used to bound the range of the clip mask.
  */
 class GrClipMaskManager : public SkNoncopyable {
 public:
     GrClipMaskManager()
         : fGpu(NULL)
         , fCurrClipMaskType(kNone_ClipMaskType) {
     }
     /**
      * Creates a clip mask if necessary as a stencil buffer or alpha texture
      * and sets the GrGpu's scissor and stencil state. If the return is false
      * then the draw can be skipped. The AutoRestoreEffects is initialized by
      * the manager when it must install additional effects to implement the
      * clip. devBounds is optional but can help optimize clipping.
      */
     bool setupClipping(const GrClipData* clipDataIn, GrDrawState::AutoRestoreEffects*,
                        const SkRect* devBounds);
     void releaseResources();
     bool isClipInStencil() const {
         return kStencil_ClipMaskType == fCurrClipMaskType;
     }
     bool isClipInAlpha() const {
         return kAlpha_ClipMaskType == fCurrClipMaskType;
     }
     void invalidateStencilMask() {
         if (kStencil_ClipMaskType == fCurrClipMaskType) {
             fCurrClipMaskType = kNone_ClipMaskType;
         }
     }
     GrContext* getContext() {
         return fAACache.getContext();
     }
     void setGpu(GrGpu* gpu);
     void adjustPathStencilParams(GrStencilSettings* settings);
 private:
     /**
      * Informs the helper function adjustStencilParams() about how the stencil
      * buffer clip is being used.
      */
     enum StencilClipMode {
         // Draw to the clip bit of the stencil buffer
         kModifyClip_StencilClipMode,
         // Clip against the existing representation of the clip in the high bit
         // of the stencil buffer.
         kRespectClip_StencilClipMode,
         // Neither writing to nor clipping against the clip bit.
         kIgnoreClip_StencilClipMode,
     };
     GrGpu* fGpu;
     /**
      * We may represent the clip as a mask in the stencil buffer or as an alpha
      * texture. It may be neither because the scissor rect suffices or we
      * haven't yet examined the clip.
      */
     enum ClipMaskType {
         kNone_ClipMaskType,
         kStencil_ClipMaskType,
         kAlpha_ClipMaskType,
     } fCurrClipMaskType;
     GrClipMaskCache fAACache;       // cache for the AA path
     // Attempts to install a series of coverage effects to implement the clip. Return indicates
     // whether the element list was successfully converted to effects.
     bool installClipEffects(const GrReducedClip::ElementList&,
                             GrDrawState::AutoRestoreEffects*,
                             const SkVector& clipOffset,
                             const SkRect* devBounds);
     // Draws the clip into the stencil buffer
     bool createStencilClipMask(int32_t elementsGenID,
                                GrReducedClip::InitialState initialState,
                                const GrReducedClip::ElementList& elements,
                                const SkIRect& clipSpaceIBounds,
                                const SkIPoint& clipSpaceToStencilOffset);
     // Creates an alpha mask of the clip. The mask is a rasterization of elements through the
     // rect specified by clipSpaceIBounds.
     GrTexture* createAlphaClipMask(int32_t elementsGenID,
                                    GrReducedClip::InitialState initialState,
                                    const GrReducedClip::ElementList& elements,
                                    const SkIRect& clipSpaceIBounds);
     // Similar to createAlphaClipMask but it rasterizes in SW and uploads to the result texture.
     GrTexture* createSoftwareClipMask(int32_t elementsGenID,
                                       GrReducedClip::InitialState initialState,
                                       const GrReducedClip::ElementList& elements,
                                       const SkIRect& clipSpaceIBounds);
     // Gets a texture to use for the clip mask. If true is returned then a cached mask was found
     // that already contains the rasterization of the clip stack, otherwise an uninitialized texture
     // is returned. 'willUpload' is set when the alpha mask needs to be uploaded from the CPU.
     bool getMaskTexture(int32_t elementsGenID,
                         const SkIRect& clipSpaceIBounds,
                         GrTexture** result,
                         bool willUpload);
     bool useSWOnlyPath(const GrReducedClip::ElementList& elements);
     // Draws a clip element into the target alpha mask. The caller should have already setup the
     // desired blend operation. Optionally if the caller already selected a path renderer it can
     // be passed. Otherwise the function will select one if the element is a path.
     bool drawElement(GrTexture* target, const SkClipStack::Element*, GrPathRenderer* = NULL);
     // Determines whether it is possible to draw the element to both the stencil buffer and the
     // alpha mask simultaneously. If so and the element is a path a compatible path renderer is
     // also returned.
     bool canStencilAndDrawElement(GrTexture* target, const SkClipStack::Element*, GrPathRenderer**);
     void mergeMask(GrTexture* dstMask,
                    GrTexture* srcMask,
                    SkRegion::Op op,
                    const SkIRect& dstBound,
                    const SkIRect& srcBound);
     void getTemp(int width, int height, GrAutoScratchTexture* temp);
     void setupCache(const SkClipStack& clip,
                     const SkIRect& bounds);
     /**
      * Called prior to return control back the GrGpu in setupClipping. It
      * updates the GrGpu with stencil settings that account stencil-based
      * clipping.
      */
     void setGpuStencil();
     /**
      * Adjusts the stencil settings to account for interaction with stencil
      * clipping.
      */
     void adjustStencilParams(GrStencilSettings* settings,
                              StencilClipMode mode,
                              int stencilBitCnt);
     typedef SkNoncopyable INHERITED;
 };
 #endif // GrClipMaskManager_DEFINED

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

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