Pass Rendertarget into context

include/gpu/GrContext.h

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrContext_DEFINED
 #define GrContext_DEFINED
 
@@ skipping 285 matching lines @@
 
     /**
      *  Temporarily override the true max texture size. Note: an override
      *  larger then the true max texture size will have no effect.
      *  This entry point is mainly meant for testing texture size dependent
      *  features and is only available if defined outside of Skia (see
      *  bleed GM.
      */
     void setMaxTextureSizeOverride(int maxTextureSizeOverride);
 
-    ///////////////////////////////////////////////////////////////////////////
-    // Render targets
-
-    /**
-     * Sets the render target.
-     * @param target    the render target to set.
-     */
-    void setRenderTarget(GrRenderTarget* target) {
-        fRenderTarget.reset(SkSafeRef(target));
-    }
-
-    /**
-     * Gets the current render target.
-     * @return the currently bound render target.
-     */
-    const GrRenderTarget* getRenderTarget() const { return fRenderTarget.get(); }
-    GrRenderTarget* getRenderTarget() { return fRenderTarget.get(); }
-
     /**
      * Can the provided configuration act as a color render target?
      */
     bool isConfigRenderable(GrPixelConfig config, bool withMSAA) const;
 
     /**
      * Return the max width or height of a render target supported by the
      * current GPU.
      */
     int getMaxRenderTargetSize() const;
@@ skipping 67 matching lines @@
      * @param color the color to clear to.
      * @param canIgnoreRect allows partial clears to be converted to whole
      *                      clears on platforms for which that is cheap
      * @param target The render target to clear.
      */
     void clear(const SkIRect* rect, GrColor color, bool canIgnoreRect, GrRenderTarget* target);
 
     /**
      *  Draw everywhere (respecting the clip) with the paint.
      */
-    void drawPaint(const GrPaint&, const SkMatrix& viewMatrix);
+    void drawPaint(GrRenderTarget*, const GrPaint&, const SkMatrix& viewMatrix);
 
     /**
      *  Draw the rect using a paint.
      *  @param paint        describes how to color pixels.
      *  @param viewMatrix   transformation matrix
      *  @param strokeInfo   the stroke information (width, join, cap), and.
      *                      the dash information (intervals, count, phase).
      *                      If strokeInfo == NULL, then the rect is filled.
      *                      Otherwise, if stroke width == 0, then the stroke
      *                      is always a single pixel thick, else the rect is
      *                      mitered/beveled stroked based on stroke width.
      *  The rects coords are used to access the paint (through texture matrix)
      */
-    void drawRect(const GrPaint& paint,
+    void drawRect(GrRenderTarget*,
+                  const GrPaint& paint,
                   const SkMatrix& viewMatrix,
                   const SkRect&,
                   const GrStrokeInfo* strokeInfo = NULL);
 
     /**
      * Maps a rectangle of shader coordinates to a rectangle and draws that rectangle
      *
      * @param paint         describes how to color pixels.
      * @param viewMatrix    transformation matrix which applies to rectToDraw
      * @param rectToDraw    the rectangle to draw
      * @param localRect     the rectangle of shader coordinates applied to rectToDraw
      * @param localMatrix   an optional matrix to transform the shader coordinates before applying
      *                      to rectToDraw
      */
-    void drawNonAARectToRect(const GrPaint& paint,
+    void drawNonAARectToRect(GrRenderTarget*,
+                             const GrPaint& paint,
                              const SkMatrix& viewMatrix,
                              const SkRect& rectToDraw,
                              const SkRect& localRect,
                              const SkMatrix* localMatrix = NULL);
 
     /**
      * Draws a non-AA rect with paint and a localMatrix
      */
-    void drawNonAARectWithLocalMatrix(const GrPaint& paint,
+    void drawNonAARectWithLocalMatrix(GrRenderTarget* rt,
+                                      const GrPaint& paint,
                                       const SkMatrix& viewMatrix,
                                       const SkRect& rect,
                                       const SkMatrix& localMatrix) {
-        this->drawNonAARectToRect(paint, viewMatrix, rect, rect, &localMatrix);
+        this->drawNonAARectToRect(rt, paint, viewMatrix, rect, rect, &localMatrix);
     }
 
     /**
      *  Draw a roundrect using a paint.
      *
      *  @param paint        describes how to color pixels.
      *  @param viewMatrix   transformation matrix
      *  @param rrect        the roundrect to draw
      *  @param strokeInfo   the stroke information (width, join, cap) and
      *                      the dash information (intervals, count, phase).
      */
-    void drawRRect(const GrPaint&, const SkMatrix& viewMatrix, const SkRRect& rrect,
+    void drawRRect(GrRenderTarget*,
+                   const GrPaint&,
+                   const SkMatrix& viewMatrix,
+                   const SkRRect& rrect,
                    const GrStrokeInfo&);
 
     /**
      *  Shortcut for drawing an SkPath consisting of nested rrects using a paint.
      *  Does not support stroking. The result is undefined if outer does not contain
      *  inner.
      *
      *  @param paint        describes how to color pixels.
      *  @param viewMatrix   transformation matrix
      *  @param outer        the outer roundrect
      *  @param inner        the inner roundrect
      */
-    void drawDRRect(const GrPaint&, const SkMatrix& viewMatrix, const SkRRect& outer,
+    void drawDRRect(GrRenderTarget*,
+                    const GrPaint&,
+                    const SkMatrix& viewMatrix,
+                    const SkRRect& outer,
                     const SkRRect& inner);
 
 
     /**
      * Draws a path.
      *
      * @param paint         describes how to color pixels.
      * @param viewMatrix    transformation matrix
      * @param path          the path to draw
      * @param strokeInfo    the stroke information (width, join, cap) and
      *                      the dash information (intervals, count, phase).
      */
-    void drawPath(const GrPaint&, const SkMatrix& viewMatrix, const SkPath&, const GrStrokeInfo&);
+    void drawPath(GrRenderTarget*,
+                  const GrPaint&,
+                  const SkMatrix& viewMatrix,
+                  const SkPath&,
+                  const GrStrokeInfo&);
 
     /**
      * Draws vertices with a paint.
      *
      * @param   paint           describes how to color pixels.
      * @param   viewMatrix      transformation matrix
      * @param   primitiveType   primitives type to draw.
      * @param   vertexCount     number of vertices.
      * @param   positions       array of vertex positions, required.
      * @param   texCoords       optional array of texture coordinates used
      *                          to access the paint.
      * @param   colors          optional array of per-vertex colors, supercedes
      *                          the paint's color field.
      * @param   indices         optional array of indices. If NULL vertices
      *                          are drawn non-indexed.
      * @param   indexCount      if indices is non-null then this is the
      *                          number of indices.
      */
-    void drawVertices(const GrPaint& paint,
+    void drawVertices(GrRenderTarget*,
+                      const GrPaint& paint,
                       const SkMatrix& viewMatrix,
                       GrPrimitiveType primitiveType,
                       int vertexCount,
                       const SkPoint positions[],
                       const SkPoint texs[],
                       const GrColor colors[],
                       const uint16_t indices[],
                       int indexCount);
 
     /**
      * Draws an oval.
      *
      * @param paint         describes how to color pixels.
      * @param viewMatrix    transformation matrix
      * @param oval          the bounding rect of the oval.
      * @param strokeInfo    the stroke information (width, join, cap) and
      *                      the dash information (intervals, count, phase).
      */
-    void drawOval(const GrPaint& paint,
+    void drawOval(GrRenderTarget*,
+                  const GrPaint& paint,
                   const SkMatrix& viewMatrix,
                   const SkRect& oval,
                   const GrStrokeInfo& strokeInfo);
 
     ///////////////////////////////////////////////////////////////////////////
     // Misc.
 
     /**
      * Flags that affect flush() behavior.
      */
@@ skipping 123 matching lines @@
      */
     void discardRenderTarget(GrRenderTarget*);
 
 #ifdef SK_DEVELOPER
     void dumpFontCache() const;
 #endif
 
     ///////////////////////////////////////////////////////////////////////////
     // Helpers
 
-    class AutoRenderTarget : public ::SkNoncopyable {
-    public:
-        AutoRenderTarget(GrContext* context, GrRenderTarget* target) {
-            fPrevTarget = context->getRenderTarget();
-            SkSafeRef(fPrevTarget);
-            context->setRenderTarget(target);
-            fContext = context;
-        }
-        AutoRenderTarget(GrContext* context) {
-            fPrevTarget = context->getRenderTarget();
-            SkSafeRef(fPrevTarget);
-            fContext = context;
-        }
-        ~AutoRenderTarget() {
-            if (fContext) {
-                fContext->setRenderTarget(fPrevTarget);
-            }
-            SkSafeUnref(fPrevTarget);
-        }
-    private:
-        GrContext*      fContext;
-        GrRenderTarget* fPrevTarget;
-    };
-
     class AutoClip : public ::SkNoncopyable {
     public:
         // This enum exists to require a caller of the constructor to acknowledge that the clip will
         // initially be wide open. It also could be extended if there are other desirable initial
         // clip states.
         enum InitialClip {
             kWideOpen_InitialClip,
         };
 
         AutoClip(GrContext* context, InitialClip SkDEBUGCODE(initialState))
@@ skipping 22 matching lines @@
     private:
         GrContext*        fContext;
         const GrClipData* fOldClip;
 
         SkClipStack       fNewClipStack;
         GrClipData        fNewClipData;
     };
 
     class AutoWideOpenIdentityDraw {
     public:
-        AutoWideOpenIdentityDraw(GrContext* ctx, GrRenderTarget* rt)
-            : fAutoClip(ctx, AutoClip::kWideOpen_InitialClip)
-            , fAutoRT(ctx, rt) {
+        AutoWideOpenIdentityDraw(GrContext* ctx)
+            : fAutoClip(ctx, AutoClip::kWideOpen_InitialClip) {
         }
 
     private:
         AutoClip fAutoClip;
-        AutoRenderTarget fAutoRT;
     };
 
     ///////////////////////////////////////////////////////////////////////////
     // Functions intended for internal use only.
     GrGpu* getGpu() { return fGpu; }
     const GrGpu* getGpu() const { return fGpu; }
     GrFontCache* getFontCache() { return fFontCache; }
     GrLayerCache* getLayerCache() { return fLayerCache.get(); }
     GrDrawTarget* getTextTarget();
     const GrIndexBuffer* getQuadIndexBuffer() const;
@@ skipping 25 matching lines @@
     /** Prints cache stats to the string if GR_CACHE_STATS == 1. */
     void dumpCacheStats(SkString*) const;
     void printCacheStats() const;
 
     /** Prints GPU stats to the string if GR_GPU_STATS == 1. */
     void dumpGpuStats(SkString*) const;
     void printGpuStats() const;
 
 private:
     GrGpu*                          fGpu;
-    SkAutoTUnref<GrRenderTarget>    fRenderTarget;
     const GrClipData*               fClip;  // TODO: make this ref counted
 
     GrResourceCache*                fResourceCache;
     GrFontCache*                    fFontCache;
     SkAutoTDelete<GrLayerCache>     fLayerCache;
 
     GrPathRendererChain*            fPathRendererChain;
     GrSoftwarePathRenderer*         fSoftwarePathRenderer;
 
     GrVertexBufferAllocPool*        fDrawBufferVBAllocPool;
@@ skipping 23 matching lines @@
     GrContext(const Options&); // init must be called after the constructor.
     bool init(GrBackend, GrBackendContext);
     void initMockContext();
     void initCommon();
 
     void setupDrawBuffer();
 
     class AutoCheckFlush;
     // Sets the paint and returns the target to draw into.  This function is overloaded to either
     // take a GrDrawState, GrPaint, and AutoCheckFlush, or JUST an AutoCheckFlush
-    GrDrawTarget* prepareToDraw(GrPipelineBuilder*, const GrPaint* paint, const AutoCheckFlush*);
+    GrDrawTarget* prepareToDraw(GrPipelineBuilder*, GrRenderTarget* rt, const GrPaint* paint,
+                                const AutoCheckFlush*);
 
     void internalDrawPath(GrDrawTarget*,
                           GrPipelineBuilder*,
                           const SkMatrix& viewMatrix,
                           GrColor,
                           bool useAA,
                           const SkPath&,
                           const GrStrokeInfo&);
 
     GrTexture* internalRefScratchTexture(const GrSurfaceDesc&, uint32_t flags);
 
     /**
      * These functions create premul <-> unpremul effects if it is possible to generate a pair
      * of effects that make a readToUPM->writeToPM->readToUPM cycle invariant. Otherwise, they
      * return NULL.
      */
     const GrFragmentProcessor* createPMToUPMEffect(GrTexture*, bool swapRAndB, const SkMatrix&);
     const GrFragmentProcessor* createUPMToPMEffect(GrTexture*, bool swapRAndB, const SkMatrix&);
 
     /**
      *  This callback allows the resource cache to callback into the GrContext
      *  when the cache is still over budget after a purge.
      */
     static void OverBudgetCB(void* data);
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif