Adds local coords to GrEffect system.

src/gpu/GrClipMaskManager.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 "GrClipMaskManager.h"
 #include "effects/GrTextureDomainEffect.h"
@@ skipping 22 matching lines @@
 // stage matrix this also alters the vertex layout
 void setup_drawstate_aaclip(GrGpu* gpu,
                             GrTexture* result,
                             const GrIRect &devBound) {
     GrDrawState* drawState = gpu->drawState();
     GrAssert(drawState);
 
     static const int kMaskStage = GrPaint::kTotalStages+1;
 
     SkMatrix mat;
+    // We want to use device coords to compute the texture coordinates. We set our matrix to be
+    // equal to the view matrix followed by an offset to the devBound, and then a scaling matrix to
+    // normalized coords. We apply this matrix to the vertex positions rather than local coords.
     mat.setIDiv(result->width(), result->height());
     mat.preTranslate(SkIntToScalar(-devBound.fLeft),
                      SkIntToScalar(-devBound.fTop));
     mat.preConcat(drawState->getViewMatrix());
 
     SkIRect domainTexels = SkIRect::MakeWH(devBound.width(), devBound.height());
     // This could be a long-lived effect that is cached with the alpha-mask.
     drawState->setEffect(kMaskStage,
                          GrTextureDomainEffect::Create(result,
                                       mat,
                                       GrTextureDomainEffect::MakeTexelDomain(result, domainTexels),
-                                      GrTextureDomainEffect::kDecal_WrapMode))->unref();
+                                      GrTextureDomainEffect::kDecal_WrapMode,
+                                      false,
+                                      GrEffect::kPosition_CoordsType))->unref();
 }
 
 bool path_needs_SW_renderer(GrContext* context,
                             GrGpu* gpu,
                             const SkPath& origPath,
                             const SkStrokeRec& stroke,
                             bool doAA) {
     // the gpu alpha mask will draw the inverse paths as non-inverse to a temp buffer
     SkTCopyOnFirstWrite<SkPath> path(origPath);
     if (path->isInverseFillType()) {
@@ skipping 282 matching lines @@
     drawState->setRenderTarget(dstMask->asRenderTarget());
 
     setup_boolean_blendcoeffs(drawState, op);
 
     SkMatrix sampleM;
     sampleM.setIDiv(srcMask->width(), srcMask->height());
     drawState->setEffect(0,
         GrTextureDomainEffect::Create(srcMask,
                                       sampleM,
                                       GrTextureDomainEffect::MakeTexelDomain(srcMask, srcBound),
-                                      GrTextureDomainEffect::kDecal_WrapMode))->unref();
+                                      GrTextureDomainEffect::kDecal_WrapMode,
+                                      false))->unref();
     fGpu->drawSimpleRect(SkRect::MakeFromIRect(dstBound), NULL);
 
     drawState->disableStage(0);
     drawState->setViewMatrix(oldMatrix);
 }
 
 // get a texture to act as a temporary buffer for AA clip boolean operations
 // TODO: given the expense of createTexture we may want to just cache this too
 void GrClipMaskManager::getTemp(int width, int height, GrAutoScratchTexture* temp) {
     if (NULL != temp->texture()) {
@@ skipping 625 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 void GrClipMaskManager::releaseResources() {
     fAACache.releaseResources();
 }
 
 void GrClipMaskManager::setGpu(GrGpu* gpu) {
     fGpu = gpu;
     fAACache.setContext(gpu->getContext());
 }