Make it possible to draw multiple paths at once to a draw target

src/gpu/GrDrawTarget.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 GrDrawTarget_DEFINED
 #define GrDrawTarget_DEFINED
 
 #include "GrClipData.h"
 #include "GrDrawState.h"
 #include "GrIndexBuffer.h"
 
 #include "SkClipStack.h"
 #include "SkMatrix.h"
 #include "SkPath.h"
+#include "SkStrokeRec.h"
 #include "SkTArray.h"
 #include "SkTLazy.h"
 #include "SkTypes.h"
 #include "SkXfermode.h"
 
 class GrClipData;
 class GrDrawTargetCaps;
 class GrPath;
 class GrVertexBuffer;
-class SkStrokeRec;
 
 class GrDrawTarget : public SkRefCnt {
 protected:
     class DrawInfo;
 
 public:
     SK_DECLARE_INST_COUNT(GrDrawTarget)
 
     ///////////////////////////////////////////////////////////////////////////
 
@@ skipping 299 matching lines @@
      */
     void stencilPath(const GrPath*, SkPath::FillType fill);
 
     /**
      * Draws a path. Fill must not be a hairline. It will respect the HW
      * antialias flag on the draw state (if possible in the 3D API).
      */
     void drawPath(const GrPath*, SkPath::FillType fill);
 
     /**
+     * Draws many paths. It will respect the HW
+     * antialias flag on the draw state (if possible in the 3D API).
+     *
+     * @param transforms array of 2d affine transformations, one for each path.
+     * @param fill the fill type for drawing all the paths. Fill must not be a
+     *             hairline.
+     * @param stroke the stroke for drawing all the paths.
+     */
+    void drawPaths(size_t pathCount, const GrPath** paths,
+                   const SkMatrix* transforms, SkPath::FillType fill,
+                   SkStrokeRec::Style stroke);
+
+    /**
      * Helper function for drawing rects. It performs a geometry src push and pop
      * and thus will finalize any reserved geometry.
      *
      * @param rect        the rect to draw
      * @param matrix      optional matrix applied to rect (before viewMatrix)
      * @param localRect   optional rect that specifies local coords to map onto
      *                    rect. If NULL then rect serves as the local coords.
      * @param localMatrix optional matrix applied to localRect. If
      *                    srcRect is non-NULL and srcMatrix is non-NULL
      *                    then srcRect will be transformed by srcMatrix.
@@ skipping 123 matching lines @@
     void executeDraw(const DrawInfo& info) { this->onDraw(info); }
 
     /**
      * For subclass internal use to invoke a call to onDrawPath().
      */
     void executeDrawPath(const GrPath* path, SkPath::FillType fill,
                          const GrDeviceCoordTexture* dstCopy) {
         this->onDrawPath(path, fill, dstCopy);
     }
 
+    /**
+     * For subclass internal use to invoke a call to onDrawPaths().
+     */
+    void executeDrawPaths(size_t pathCount, const GrPath** paths,
+                          const SkMatrix* transforms, SkPath::FillType fill,
+                          SkStrokeRec::Style stroke,
+                          const GrDeviceCoordTexture* dstCopy) {
+        this->onDrawPaths(pathCount, paths, transforms, fill, stroke, dstCopy);
+    }
+
     ////////////////////////////////////////////////////////////////////////////
 
     /**
      * See AutoStateRestore below.
      */
     enum ASRInit {
         kPreserve_ASRInit,
         kReset_ASRInit
     };
 
@@ skipping 360 matching lines @@
     // drawIndexedInstances, ...). The base class draws a two triangle fan using
     // drawNonIndexed from reserved vertex space.
     virtual void onDrawRect(const SkRect& rect,
                             const SkMatrix* matrix,
                             const SkRect* localRect,
                             const SkMatrix* localMatrix);
 
     virtual void onStencilPath(const GrPath*, SkPath::FillType) = 0;
     virtual void onDrawPath(const GrPath*, SkPath::FillType,
                             const GrDeviceCoordTexture* dstCopy) = 0;
+    virtual void onDrawPaths(size_t, const GrPath**, const SkMatrix*,
+                             SkPath::FillType, SkStrokeRec::Style,
+                             const GrDeviceCoordTexture* dstCopy) = 0;
 
     virtual void onInstantGpuTraceEvent(const char* marker) = 0;
     virtual void onPushGpuTraceEvent(const char* marker) = 0;
     virtual void onPopGpuTraceEvent() = 0;
 
     // helpers for reserving vertex and index space.
     bool reserveVertexSpace(size_t vertexSize,
                             int vertexCount,
                             void** vertices);
     bool reserveIndexSpace(int indexCount, void** indices);
@@ skipping 26 matching lines @@
     GrDrawState                                                     fDefaultDrawState;
     // The context owns us, not vice-versa, so this ptr is not ref'ed by DrawTarget.
     GrContext*                                                      fContext;
     // To keep track that we always have at least as many debug marker pushes as pops
     int                                                             fPushGpuTraceCount;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif