Switch textures created by DeviceImageFilterProxy to approx-match.

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"
 #include "SkUnPreMultiply.h"
 #include "SkColorPriv.h"
 #if SK_SUPPORT_GPU
 #include "GrContext.h"
 #include "GrCoordTransform.h"
 #include "GrInvariantOutput.h"
+#include "effects/GrTextureDomain.h"
 #include "gl/GrGLProcessor.h"
 #include "gl/builders/GrGLProgramBuilder.h"
 #endif
 
 namespace {
 
 #define kChannelSelectorKeyBits 3; // Max value is 4, so 3 bits are required at most
 
 template<SkDisplacementMapEffect::ChannelSelectorType type>
 uint32_t getValue(SkColor, const SkUnPreMultiply::Scale*) {
@@ skipping 280 matching lines @@
     virtual void emitCode(GrGLFPBuilder*,
                           const GrFragmentProcessor&,
                           const char* outputColor,
                           const char* inputColor,
                           const TransformedCoordsArray&,
                           const TextureSamplerArray&) override;
 
     static inline void GenKey(const GrProcessor&, const GrGLCaps&, GrProcessorKeyBuilder*);
 
     void setData(const GrGLProgramDataManager&, const GrProcessor&) override;
+    const GrTextureDomain::GLDomain& glDomain() const { return fGLDomain; }
 
 private:
     SkDisplacementMapEffect::ChannelSelectorType fXChannelSelector;
     SkDisplacementMapEffect::ChannelSelectorType fYChannelSelector;
     GrGLProgramDataManager::UniformHandle fScaleUni;
+    GrTextureDomain::GLDomain fGLDomain;
 
     typedef GrGLFragmentProcessor INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 class GrDisplacementMapEffect : public GrFragmentProcessor {
 public:
     static GrFragmentProcessor* Create(
             SkDisplacementMapEffect::ChannelSelectorType xChannelSelector,
             SkDisplacementMapEffect::ChannelSelectorType yChannelSelector, SkVector scale,
-            GrTexture* displacement, const SkMatrix& offsetMatrix, GrTexture* color) {
+            GrTexture* displacement, const SkMatrix& offsetMatrix, GrTexture* color,
+            const SkISize& colorDimensions) {
         return SkNEW_ARGS(GrDisplacementMapEffect, (xChannelSelector,
                                                     yChannelSelector,
                                                     scale,
                                                     displacement,
                                                     offsetMatrix,
-                                                    color));
+                                                    color,
+                                                    colorDimensions));
     }
 
     virtual ~GrDisplacementMapEffect();
 
     virtual void getGLProcessorKey(const GrGLCaps& caps,
                                    GrProcessorKeyBuilder* b) const override {
         GrGLDisplacementMapEffect::GenKey(*this, caps, b);
     }
 
     GrGLFragmentProcessor* createGLInstance() const override {
         return SkNEW_ARGS(GrGLDisplacementMapEffect, (*this));
     }
 
     SkDisplacementMapEffect::ChannelSelectorType xChannelSelector() const
         { return fXChannelSelector; }
     SkDisplacementMapEffect::ChannelSelectorType yChannelSelector() const
         { return fYChannelSelector; }
     const SkVector& scale() const { return fScale; }
 
     const char* name() const override { return "DisplacementMap"; }
+    const GrTextureDomain& domain() const { return fDomain; }
 
 private:
     bool onIsEqual(const GrFragmentProcessor&) const override;
 
     void onComputeInvariantOutput(GrInvariantOutput* inout) const override;
 
     GrDisplacementMapEffect(SkDisplacementMapEffect::ChannelSelectorType xChannelSelector,
                             SkDisplacementMapEffect::ChannelSelectorType yChannelSelector,
                             const SkVector& scale,
                             GrTexture* displacement, const SkMatrix& offsetMatrix,
-                            GrTexture* color);
+                            GrTexture* color,
+                            const SkISize& colorDimensions);
 
     GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
 
     GrCoordTransform            fDisplacementTransform;
     GrTextureAccess             fDisplacementAccess;
     GrCoordTransform            fColorTransform;
+    GrTextureDomain             fDomain;
     GrTextureAccess             fColorAccess;
     SkDisplacementMapEffect::ChannelSelectorType fXChannelSelector;
     SkDisplacementMapEffect::ChannelSelectorType fYChannelSelector;
     SkVector fScale;
 
     typedef GrFragmentProcessor INHERITED;
 };
 
 bool SkDisplacementMapEffect::filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx,
                                              SkBitmap* result, SkIPoint* offset) const {
@@ skipping 48 matching lines @@
     SkMatrix offsetMatrix = GrCoordTransform::MakeDivByTextureWHMatrix(displacement);
     offsetMatrix.preTranslate(SkIntToScalar(colorOffset.fX - displacementOffset.fX),
                               SkIntToScalar(colorOffset.fY - displacementOffset.fY));
 
     paint.addColorProcessor(
         GrDisplacementMapEffect::Create(fXChannelSelector,
                                         fYChannelSelector,
                                         scale,
                                         displacement,
                                         offsetMatrix,
-                                        color))->unref();
+                                        color,
+                                        colorBM.dimensions()))->unref();
     SkIRect colorBounds = bounds;
     colorBounds.offset(-colorOffset);
     SkMatrix matrix;
     matrix.setTranslate(-SkIntToScalar(colorBounds.x()),
                         -SkIntToScalar(colorBounds.y()));
     context->drawRect(dst->asRenderTarget(), GrClip::WideOpen(), paint, matrix,
                       SkRect::Make(colorBounds));
     offset->fX = bounds.left();
     offset->fY = bounds.top();
     WrapTexture(dst, bounds.width(), bounds.height(), result);
     return true;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 GrDisplacementMapEffect::GrDisplacementMapEffect(
                              SkDisplacementMapEffect::ChannelSelectorType xChannelSelector,
                              SkDisplacementMapEffect::ChannelSelectorType yChannelSelector,
                              const SkVector& scale,
                              GrTexture* displacement,
                              const SkMatrix& offsetMatrix,
-                             GrTexture* color)
+                             GrTexture* color,
+                             const SkISize& colorDimensions)
     : fDisplacementTransform(kLocal_GrCoordSet, offsetMatrix, displacement,
                              GrTextureParams::kNone_FilterMode)
     , fDisplacementAccess(displacement)
     , fColorTransform(kLocal_GrCoordSet, color, GrTextureParams::kNone_FilterMode)
+    , fDomain(GrTextureDomain::MakeTexelDomain(color, SkIRect::MakeSize(colorDimensions)),
+              GrTextureDomain::kDecal_Mode)
     , fColorAccess(color)
     , fXChannelSelector(xChannelSelector)
     , fYChannelSelector(yChannelSelector)
     , fScale(scale) {
     this->initClassID<GrDisplacementMapEffect>();
     this->addCoordTransform(&fDisplacementTransform);
     this->addTextureAccess(&fDisplacementAccess);
     this->addCoordTransform(&fColorTransform);
     this->addTextureAccess(&fColorAccess);
 }
@@ skipping 31 matching lines @@
                                            GrProcessorUnitTest::kAlphaTextureIdx;
     static const int kMaxComponent = 4;
     SkDisplacementMapEffect::ChannelSelectorType xChannelSelector =
         static_cast<SkDisplacementMapEffect::ChannelSelectorType>(
         random->nextRangeU(1, kMaxComponent));
     SkDisplacementMapEffect::ChannelSelectorType yChannelSelector =
         static_cast<SkDisplacementMapEffect::ChannelSelectorType>(
         random->nextRangeU(1, kMaxComponent));
     SkVector scale = SkVector::Make(random->nextRangeScalar(0, 100.0f),
                                     random->nextRangeScalar(0, 100.0f));
-
+    SkISize colorDimensions;
+    colorDimensions.fWidth = random->nextRangeU(0, textures[texIdxColor]->width());
+    colorDimensions.fHeight = random->nextRangeU(0, textures[texIdxColor]->height());
     return GrDisplacementMapEffect::Create(xChannelSelector, yChannelSelector, scale,
                                            textures[texIdxDispl], SkMatrix::I(),
-                                           textures[texIdxColor]);
+                                           textures[texIdxColor], colorDimensions);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 GrGLDisplacementMapEffect::GrGLDisplacementMapEffect(const GrProcessor& proc)
     : fXChannelSelector(proc.cast<GrDisplacementMapEffect>().xChannelSelector())
     , fYChannelSelector(proc.cast<GrDisplacementMapEffect>().yChannelSelector()) {
 }
 
 GrGLDisplacementMapEffect::~GrGLDisplacementMapEffect() {
 }
 
 void GrGLDisplacementMapEffect::emitCode(GrGLFPBuilder* builder,
-                                         const GrFragmentProcessor&,
+                                         const GrFragmentProcessor& fp,
                                          const char* outputColor,
                                          const char* inputColor,
                                          const TransformedCoordsArray& coords,
                                          const TextureSamplerArray& samplers) {
+    const GrTextureDomain& domain = fp.cast<GrDisplacementMapEffect>().domain();
     sk_ignore_unused_variable(inputColor);
 
     fScaleUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
                                     kVec2f_GrSLType, kDefault_GrSLPrecision, "Scale");
     const char* scaleUni = builder->getUniformCStr(fScaleUni);
     const char* dColor = "dColor";
     const char* cCoords = "cCoords";
-    const char* outOfBounds = "outOfBounds";
     const char* nearZero = "1e-6"; // Since 6.10352e−5 is the smallest half float, use
                                    // a number smaller than that to approximate 0, but
                                    // leave room for 32-bit float GPU rounding errors.
 
     GrGLFPFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder();
     fsBuilder->codeAppendf("\t\tvec4 %s = ", dColor);
     fsBuilder->appendTextureLookup(samplers[0], coords[0].c_str(), coords[0].getType());
     fsBuilder->codeAppend(";\n");
 
     // Unpremultiply the displacement
@@ skipping 33 matching lines @@
         break;
       case SkDisplacementMapEffect::kA_ChannelSelectorType:
         fsBuilder->codeAppend("a");
         break;
       case SkDisplacementMapEffect::kUnknown_ChannelSelectorType:
       default:
         SkDEBUGFAIL("Unknown Y channel selector");
     }
     fsBuilder->codeAppend("-vec2(0.5));\t\t");
 
-    // FIXME : This can be achieved with a "clamp to border" texture repeat mode and
-    //         a 0 border color instead of computing if cCoords is out of bounds here.
-    fsBuilder->codeAppendf(
-        "bool %s = (%s.x < 0.0) || (%s.y < 0.0) || (%s.x > 1.0) || (%s.y > 1.0);\t\t",
-        outOfBounds, cCoords, cCoords, cCoords, cCoords);
-    fsBuilder->codeAppendf("%s = %s ? vec4(0.0) : ", outputColor, outOfBounds);
-
-    // cCoords is always a vec2f
-    fsBuilder->appendTextureLookup(samplers[1], cCoords, kVec2f_GrSLType);
+    fGLDomain.sampleTexture(fsBuilder, domain, outputColor, SkString(cCoords), samplers[1]);
     fsBuilder->codeAppend(";\n");
 }
 
 void GrGLDisplacementMapEffect::setData(const GrGLProgramDataManager& pdman,
                                         const GrProcessor& proc) {
     const GrDisplacementMapEffect& displacementMap = proc.cast<GrDisplacementMapEffect>();
     GrTexture* colorTex = displacementMap.texture(1);
     SkScalar scaleX = SkScalarDiv(displacementMap.scale().fX, SkIntToScalar(colorTex->width()));
     SkScalar scaleY = SkScalarDiv(displacementMap.scale().fY, SkIntToScalar(colorTex->height()));
     pdman.set2f(fScaleUni, SkScalarToFloat(scaleX),
                 colorTex->origin() == kTopLeft_GrSurfaceOrigin ?
                 SkScalarToFloat(scaleY) : SkScalarToFloat(-scaleY));
+    fGLDomain.setData(pdman, displacementMap.domain(), colorTex->origin());
 }
 
 void GrGLDisplacementMapEffect::GenKey(const GrProcessor& proc,
                                        const GrGLCaps&, GrProcessorKeyBuilder* b) {
     const GrDisplacementMapEffect& displacementMap = proc.cast<GrDisplacementMapEffect>();
 
     uint32_t xKey = displacementMap.xChannelSelector();
     uint32_t yKey = displacementMap.yChannelSelector() << kChannelSelectorKeyBits;
 
     b->add32(xKey | yKey);
 }
 #endif