Implement support for a Context parameter in image filters

src/effects/SkDisplacementMapEffect.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkDisplacementMapEffect.h"
 #include "SkReadBuffer.h"
 #include "SkWriteBuffer.h"
@@ skipping 176 matching lines @@
 
 void SkDisplacementMapEffect::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
     buffer.writeInt((int) fXChannelSelector);
     buffer.writeInt((int) fYChannelSelector);
     buffer.writeScalar(fScale);
 }
 
 bool SkDisplacementMapEffect::onFilterImage(Proxy* proxy,
                                             const SkBitmap& src,
-                                            const SkMatrix& ctm,
+                                            const Context& ctx,
                                             SkBitmap* dst,
                                             SkIPoint* offset) const {
     SkBitmap displ = src, color = src;
     const SkImageFilter* colorInput = getColorInput();
     const SkImageFilter* displInput = getDisplacementInput();
     SkIPoint colorOffset = SkIPoint::Make(0, 0), displOffset = SkIPoint::Make(0, 0);
-    if ((colorInput && !colorInput->filterImage(proxy, src, ctm, &color, &colorOffset)) ||
-        (displInput && !displInput->filterImage(proxy, src, ctm, &displ, &displOffset))) {
+    if ((colorInput && !colorInput->filterImage(proxy, src, ctx, &color, &colorOffset)) ||
+        (displInput && !displInput->filterImage(proxy, src, ctx, &displ, &displOffset))) {
         return false;
     }
     if ((displ.colorType() != kPMColor_SkColorType) ||
         (color.colorType() != kPMColor_SkColorType)) {
         return false;
     }
 
     SkAutoLockPixels alp_displacement(displ), alp_color(color);
     if (!displ.getPixels() || !color.getPixels()) {
         return false;
     }
     SkIRect bounds;
     color.getBounds(&bounds);
     bounds.offset(colorOffset);
-    if (!this->applyCropRect(&bounds, ctm)) {
+    if (!this->applyCropRect(&bounds, ctx.ctm())) {
         return false;
     }
     SkIRect displBounds;
     displ.getBounds(&displBounds);
     displBounds.offset(displOffset);
-    if (!this->applyCropRect(&displBounds, ctm)) {
+    if (!this->applyCropRect(&displBounds, ctx.ctm())) {
         return false;
     }
     if (!bounds.intersect(displBounds)) {
         return false;
     }
 
     dst->setConfig(color.config(), bounds.width(), bounds.height());
     if (!dst->allocPixels()) {
         return false;
     }
 
     SkVector scale = SkVector::Make(fScale, fScale);
-    ctm.mapVectors(&scale, 1);
+    ctx.ctm().mapVectors(&scale, 1);
     SkIRect colorBounds = bounds;
     colorBounds.offset(-colorOffset);
 
     computeDisplacement(fXChannelSelector, fYChannelSelector, scale, dst,
                         &displ, colorOffset - displOffset, &color, colorBounds);
 
     offset->fX = bounds.left();
     offset->fY = bounds.top();
     return true;
 }
@@ skipping 91 matching lines @@
     GrTextureAccess             fDisplacementAccess;
     GrCoordTransform            fColorTransform;
     GrTextureAccess             fColorAccess;
     SkDisplacementMapEffect::ChannelSelectorType fXChannelSelector;
     SkDisplacementMapEffect::ChannelSelectorType fYChannelSelector;
     SkVector fScale;
 
     typedef GrEffect INHERITED;
 };
 
-bool SkDisplacementMapEffect::filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
+bool SkDisplacementMapEffect::filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx,
                                              SkBitmap* result, SkIPoint* offset) const {
     SkBitmap colorBM = src;
     SkIPoint colorOffset = SkIPoint::Make(0, 0);
-    if (getColorInput() && !getColorInput()->getInputResultGPU(proxy, src, ctm, &colorBM,
+    if (getColorInput() && !getColorInput()->getInputResultGPU(proxy, src, ctx, &colorBM,
                                                                &colorOffset)) {
         return false;
     }
     GrTexture* color = colorBM.getTexture();
     SkBitmap displacementBM = src;
     SkIPoint displacementOffset = SkIPoint::Make(0, 0);
     if (getDisplacementInput() &&
-        !getDisplacementInput()->getInputResultGPU(proxy, src, ctm, &displacementBM,
+        !getDisplacementInput()->getInputResultGPU(proxy, src, ctx, &displacementBM,
                                                    &displacementOffset)) {
         return false;
     }
     GrTexture* displacement = displacementBM.getTexture();
     GrContext* context = color->getContext();
 
     GrTextureDesc desc;
     desc.fFlags = kRenderTarget_GrTextureFlagBit | kNoStencil_GrTextureFlagBit;
     desc.fWidth = colorBM.width();
     desc.fHeight = colorBM.height();
     desc.fConfig = kSkia8888_GrPixelConfig;
 
     GrAutoScratchTexture ast(context, desc);
     SkAutoTUnref<GrTexture> dst(ast.detach());
 
     GrContext::AutoRenderTarget art(context, dst->asRenderTarget());
 
     SkVector scale = SkVector::Make(fScale, fScale);
-    ctm.mapVectors(&scale, 1);
+    ctx.ctm().mapVectors(&scale, 1);
     SkIRect bounds;
     colorBM.getBounds(&bounds);
     bounds.offset(colorOffset);
-    if (!this->applyCropRect(&bounds, ctm)) {
+    if (!this->applyCropRect(&bounds, ctx.ctm())) {
         return false;
     }
     SkIRect displBounds;
     displacementBM.getBounds(&displBounds);
     displBounds.offset(displacementOffset);
-    if (!this->applyCropRect(&displBounds, ctm)) {
+    if (!this->applyCropRect(&displBounds, ctx.ctm())) {
         return false;
     }
     if (!bounds.intersect(displBounds)) {
         return false;
     }
 
     GrPaint paint;
     SkMatrix offsetMatrix = GrEffect::MakeDivByTextureWHMatrix(displacement);
     offsetMatrix.preTranslate(SkIntToScalar(colorOffset.fX - displacementOffset.fX),
                               SkIntToScalar(colorOffset.fY - displacementOffset.fY));
@@ skipping 199 matching lines @@
                                                         const GrGLCaps&) {
     const GrDisplacementMapEffect& displacementMap =
         drawEffect.castEffect<GrDisplacementMapEffect>();
 
     EffectKey xKey = displacementMap.xChannelSelector();
     EffectKey yKey = displacementMap.yChannelSelector() << kChannelSelectorKeyBits;
 
     return xKey | yKey;
 }
 #endif