Replace fixed-size array of effect stages in GrDrawState with two appendable arrays, one for color,…

src/gpu/GrSWMaskHelper.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrSWMaskHelper.h"
 #include "GrDrawState.h"
 #include "GrGpu.h"
@@ skipping 173 matching lines @@
 
 void GrSWMaskHelper::DrawToTargetWithPathMask(GrTexture* texture,
                                               GrDrawTarget* target,
                                               const GrIRect& rect) {
     GrDrawState* drawState = target->drawState();
 
     GrDrawState::AutoViewMatrixRestore avmr;
     if (!avmr.setIdentity(drawState)) {
         return;
     }
+    GrDrawState::AutoRestoreEffects are(drawState);
     enum {
         // the SW path renderer shares this stage with glyph
         // rendering (kGlyphMaskStage in GrTextContext)
         // && edge rendering (kEdgeEffectStage in GrContext)
         kPathMaskStage = GrPaint::kTotalStages,
     };
 
     GrRect dstRect = GrRect::MakeLTRB(
                             SK_Scalar1 * rect.fLeft,
                             SK_Scalar1 * rect.fTop,
                             SK_Scalar1 * rect.fRight,
                             SK_Scalar1 * rect.fBottom);
 
     // We want to use device coords to compute the texture coordinates. We set our matrix to be
     // equal to the view matrix followed by a translation so that the top-left of the device bounds
     // maps to 0,0, and then a scaling matrix to normalized coords. We apply this matrix to the
     // vertex positions rather than local coords.
     SkMatrix maskMatrix;
     maskMatrix.setIDiv(texture->width(), texture->height());
     maskMatrix.preTranslate(SkIntToScalar(-rect.fLeft), SkIntToScalar(-rect.fTop));
     maskMatrix.preConcat(drawState->getViewMatrix());
 
-    GrAssert(!drawState->isStageEnabled(kPathMaskStage));
-    drawState->setEffect(kPathMaskStage,
+    drawState->addCoverageEffect(
                          GrSimpleTextureEffect::Create(texture,
                                                        maskMatrix,
                                                        false,
                                                        GrEffect::kPosition_CoordsType))->unref();
 
     target->drawSimpleRect(dstRect);
-    drawState->disableStage(kPathMaskStage);
 }