The Tor Browser: comparison gfx/skia/trunk/src/gpu/effects/GrTextureDomain.cpp

--1:000000000000
+:c3c46cb24597
+/*
+* 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 "GrTextureDomain.h"
+#include "GrSimpleTextureEffect.h"
+#include "GrTBackendEffectFactory.h"
+#include "gl/GrGLEffect.h"
+#include "SkFloatingPoint.h"
+GrTextureDomain::GrTextureDomain(const SkRect& domain, Mode mode, int index)
+: fIndex(index) {
+static const SkRect kFullRect = {0, 0, SK_Scalar1, SK_Scalar1};
+if (domain.contains(kFullRect)) {
+fMode = kIgnore_Mode;
+} else {
+fMode = mode;
+}
+if (fMode != kIgnore_Mode) {
+// We don't currently handle domains that are empty or don't intersect the texture.
+// It is OK if the domain rect is a line or point, but it should not be inverted. We do not
+// handle rects that do not intersect the [0..1]x[0..1] rect.
+SkASSERT(domain.fLeft <= domain.fRight);
+SkASSERT(domain.fTop <= domain.fBottom);
+fDomain.fLeft = SkMaxScalar(domain.fLeft, kFullRect.fLeft);
+fDomain.fRight = SkMinScalar(domain.fRight, kFullRect.fRight);
+fDomain.fTop = SkMaxScalar(domain.fTop, kFullRect.fTop);
+fDomain.fBottom = SkMinScalar(domain.fBottom, kFullRect.fBottom);
+SkASSERT(fDomain.fLeft <= fDomain.fRight);
+SkASSERT(fDomain.fTop <= fDomain.fBottom);
+}
+}
+//////////////////////////////////////////////////////////////////////////////
+void GrTextureDomain::GLDomain::sampleTexture(GrGLShaderBuilder* builder,
+const GrTextureDomain& textureDomain,
+const char* outColor,
+const SkString& inCoords,
+const GrGLEffect::TextureSampler sampler,
+const char* inModulateColor) {
+SkASSERT((Mode)-1 == fMode || textureDomain.mode() == fMode);
+SkDEBUGCODE(fMode = textureDomain.mode();)
+if (kIgnore_Mode == textureDomain.mode()) {
+builder->fsCodeAppendf("\t%s = ", outColor);
+builder->fsAppendTextureLookupAndModulate(inModulateColor, sampler,
+inCoords.c_str());
+builder->fsCodeAppend(";\n");
+return;
+}
+if (!fDomainUni.isValid()) {
+const char* name;
+SkString uniName("TexDom");
+if (textureDomain.fIndex >= 0) {
+uniName.appendS32(textureDomain.fIndex);
+}
+fDomainUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
+kVec4f_GrSLType, uniName.c_str(), &name);
+fDomainName = name;
+}
+if (kClamp_Mode == textureDomain.mode()) {
+SkString clampedCoords;
+clampedCoords.appendf("\tclamp(%s, %s.xy, %s.zw)",
+inCoords.c_str(), fDomainName.c_str(), fDomainName.c_str());
+builder->fsCodeAppendf("\t%s = ", outColor);
+builder->fsAppendTextureLookupAndModulate(inModulateColor, sampler, clampedCoords.c_str());
+builder->fsCodeAppend(";\n");
+} else {
+SkASSERT(GrTextureDomain::kDecal_Mode == textureDomain.mode());
+// Add a block since we're going to declare variables.
+GrGLShaderBuilder::FSBlock block(builder);
+const char* domain = fDomainName.c_str();
+if (kImagination_GrGLVendor == builder->ctxInfo().vendor()) {
+// On the NexusS and GalaxyNexus, the other path (with the 'any'
+// call) causes the compilation error "Calls to any function that
+// may require a gradient calculation inside a conditional block
+// may return undefined results". This appears to be an issue with
+// the 'any' call since even the simple "result=black; if (any())
+// result=white;" code fails to compile.
+builder->fsCodeAppend("\tvec4 outside = vec4(0.0, 0.0, 0.0, 0.0);\n");
+builder->fsCodeAppend("\tvec4 inside = ");
+builder->fsAppendTextureLookupAndModulate(inModulateColor, sampler, inCoords.c_str());
+builder->fsCodeAppend(";\n");
+builder->fsCodeAppendf("\tfloat x = abs(2.0*(%s.x - %s.x)/(%s.z - %s.x) - 1.0);\n",
+inCoords.c_str(), domain, domain, domain);
+builder->fsCodeAppendf("\tfloat y = abs(2.0*(%s.y - %s.y)/(%s.w - %s.y) - 1.0);\n",
+inCoords.c_str(), domain, domain, domain);
+builder->fsCodeAppend("\tfloat blend = step(1.0, max(x, y));\n");
+builder->fsCodeAppendf("\t%s = mix(inside, outside, blend);\n", outColor);
+} else {
+builder->fsCodeAppend("\tbvec4 outside;\n");
+builder->fsCodeAppendf("\toutside.xy = lessThan(%s, %s.xy);\n", inCoords.c_str(),
+domain);
+builder->fsCodeAppendf("\toutside.zw = greaterThan(%s, %s.zw);\n", inCoords.c_str(),
+domain);
+builder->fsCodeAppendf("\t%s = any(outside) ? vec4(0.0, 0.0, 0.0, 0.0) : ", outColor);
+builder->fsAppendTextureLookupAndModulate(inModulateColor, sampler, inCoords.c_str());
+builder->fsCodeAppend(";\n");
+}
+}
+}
+void GrTextureDomain::GLDomain::setData(const GrGLUniformManager& uman,
+const GrTextureDomain& textureDomain,
+GrSurfaceOrigin textureOrigin) {
+SkASSERT(textureDomain.mode() == fMode);
+if (kIgnore_Mode != textureDomain.mode()) {
+GrGLfloat values[4] = {
+SkScalarToFloat(textureDomain.domain().left()),
+SkScalarToFloat(textureDomain.domain().top()),
+SkScalarToFloat(textureDomain.domain().right()),
+SkScalarToFloat(textureDomain.domain().bottom())
+};
+// vertical flip if necessary
+if (kBottomLeft_GrSurfaceOrigin == textureOrigin) {
+values[1] = 1.0f - values[1];
+values[3] = 1.0f - values[3];
+// The top and bottom were just flipped, so correct the ordering
+// of elements so that values = (l, t, r, b).
+SkTSwap(values[1], values[3]);
+}
+if (0 != memcmp(values, fPrevDomain, 4 * sizeof(GrGLfloat))) {
+uman.set4fv(fDomainUni, 1, values);
+memcpy(fPrevDomain, values, 4 * sizeof(GrGLfloat));
+}
+}
+}
+//////////////////////////////////////////////////////////////////////////////
+class GrGLTextureDomainEffect : public GrGLEffect {
+public:
+GrGLTextureDomainEffect(const GrBackendEffectFactory&, const GrDrawEffect&);
+virtual void emitCode(GrGLShaderBuilder*,
+const GrDrawEffect&,
+EffectKey,
+const char* outputColor,
+const char* inputColor,
+const TransformedCoordsArray&,
+const TextureSamplerArray&) SK_OVERRIDE;
+virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE;
+static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&);
+private:
+GrTextureDomain::GLDomain         fGLDomain;
+typedef GrGLEffect INHERITED;
+};
+GrGLTextureDomainEffect::GrGLTextureDomainEffect(const GrBackendEffectFactory& factory,
+const GrDrawEffect&)
+: INHERITED(factory) {
+}
+void GrGLTextureDomainEffect::emitCode(GrGLShaderBuilder* builder,
+const GrDrawEffect& drawEffect,
+EffectKey key,
+const char* outputColor,
+const char* inputColor,
+const TransformedCoordsArray& coords,
+const TextureSamplerArray& samplers) {
+const GrTextureDomainEffect& effect = drawEffect.castEffect<GrTextureDomainEffect>();
+const GrTextureDomain& domain = effect.textureDomain();
+SkString coords2D = builder->ensureFSCoords2D(coords, 0);
+fGLDomain.sampleTexture(builder, domain, outputColor, coords2D, samplers[0], inputColor);
+}
+void GrGLTextureDomainEffect::setData(const GrGLUniformManager& uman,
+const GrDrawEffect& drawEffect) {
+const GrTextureDomainEffect& effect = drawEffect.castEffect<GrTextureDomainEffect>();
+const GrTextureDomain& domain = effect.textureDomain();
+fGLDomain.setData(uman, domain, effect.texture(0)->origin());
+}
+GrGLEffect::EffectKey GrGLTextureDomainEffect::GenKey(const GrDrawEffect& drawEffect,
+const GrGLCaps&) {
+const GrTextureDomain& domain = drawEffect.castEffect<GrTextureDomainEffect>().textureDomain();
+return GrTextureDomain::GLDomain::DomainKey(domain);
+}
+///////////////////////////////////////////////////////////////////////////////
+GrEffectRef* GrTextureDomainEffect::Create(GrTexture* texture,
+const SkMatrix& matrix,
+const SkRect& domain,
+GrTextureDomain::Mode mode,
+GrTextureParams::FilterMode filterMode,
+GrCoordSet coordSet) {
+static const SkRect kFullRect = {0, 0, SK_Scalar1, SK_Scalar1};
+if (GrTextureDomain::kIgnore_Mode == mode ||
+(GrTextureDomain::kClamp_Mode == mode && domain.contains(kFullRect))) {
+return GrSimpleTextureEffect::Create(texture, matrix, filterMode);
+} else {
+AutoEffectUnref effect(SkNEW_ARGS(GrTextureDomainEffect, (texture,
+matrix,
+domain,
+mode,
+filterMode,
+coordSet)));
+return CreateEffectRef(effect);
+}
+}
+GrTextureDomainEffect::GrTextureDomainEffect(GrTexture* texture,
+const SkMatrix& matrix,
+const SkRect& domain,
+GrTextureDomain::Mode mode,
+GrTextureParams::FilterMode filterMode,
+GrCoordSet coordSet)
+: GrSingleTextureEffect(texture, matrix, filterMode, coordSet)
+, fTextureDomain(domain, mode) {
+}
+GrTextureDomainEffect::~GrTextureDomainEffect() {
+}
+const GrBackendEffectFactory& GrTextureDomainEffect::getFactory() const {
+return GrTBackendEffectFactory<GrTextureDomainEffect>::getInstance();
+}
+bool GrTextureDomainEffect::onIsEqual(const GrEffect& sBase) const {
+const GrTextureDomainEffect& s = CastEffect<GrTextureDomainEffect>(sBase);
+return this->hasSameTextureParamsMatrixAndSourceCoords(s) &&
+this->fTextureDomain == s.fTextureDomain;
+}
+void GrTextureDomainEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
+if (GrTextureDomain::kDecal_Mode == fTextureDomain.mode()) { // TODO: helper
+*validFlags = 0;
+} else {
+this->updateConstantColorComponentsForModulation(color, validFlags);
+}
+}
+///////////////////////////////////////////////////////////////////////////////
+GR_DEFINE_EFFECT_TEST(GrTextureDomainEffect);
+GrEffectRef* GrTextureDomainEffect::TestCreate(SkRandom* random,
+GrContext*,
+const GrDrawTargetCaps&,
+GrTexture* textures[]) {
+int texIdx = random->nextBool() ? GrEffectUnitTest::kSkiaPMTextureIdx :
+GrEffectUnitTest::kAlphaTextureIdx;
+SkRect domain;
+domain.fLeft = random->nextUScalar1();
+domain.fRight = random->nextRangeScalar(domain.fLeft, SK_Scalar1);
+domain.fTop = random->nextUScalar1();
+domain.fBottom = random->nextRangeScalar(domain.fTop, SK_Scalar1);
+GrTextureDomain::Mode mode =
+(GrTextureDomain::Mode) random->nextULessThan(GrTextureDomain::kModeCount);
+const SkMatrix& matrix = GrEffectUnitTest::TestMatrix(random);
+bool bilerp = random->nextBool();
+GrCoordSet coords = random->nextBool() ? kLocal_GrCoordSet : kPosition_GrCoordSet;
+return GrTextureDomainEffect::Create(textures[texIdx],
+matrix,
+domain,
+mode,
+bilerp ? GrTextureParams::kBilerp_FilterMode : GrTextureParams::kNone_FilterMode,
+coords);
+}

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comparison: gfx/skia/trunk/src/gpu/effects/GrTextureDomain.cpp

gfx/skia/trunk/src/gpu/effects/GrTextureDomain.cpp