| /* | |
| * 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 "GrOvalRenderer.h" | |
| #include "GrProcessor.h" | |
| #include "GrDrawState.h" | |
| #include "GrDrawTarget.h" | |
| #include "GrGeometryProcessor.h" | |
| #include "GrGpu.h" | |
| #include "GrInvariantOutput.h" | |
| #include "SkRRect.h" | |
| #include "SkStrokeRec.h" | |
| #include "SkTLazy.h" | |
| #include "effects/GrRRectEffect.h" | |
| #include "gl/GrGLProcessor.h" | |
| #include "gl/GrGLSL.h" | |
| #include "gl/GrGLGeometryProcessor.h" | |
| #include "gl/builders/GrGLProgramBuilder.h" | |
| namespace { | |
| // TODO(joshualitt) add per vertex colors | |
| struct CircleVertex { | |
| SkPoint fPos; | |
| SkPoint fOffset; | |
| SkScalar fOuterRadius; | |
| SkScalar fInnerRadius; | |
| }; | |
| struct EllipseVertex { | |
| SkPoint fPos; | |
| SkPoint fOffset; | |
| SkPoint fOuterRadii; | |
| SkPoint fInnerRadii; | |
| }; | |
| struct DIEllipseVertex { | |
| SkPoint fPos; | |
| SkPoint fOuterOffset; | |
| SkPoint fInnerOffset; | |
| }; | |
| inline bool circle_stays_circle(const SkMatrix& m) { | |
| return m.isSimilarity(); | |
| } | |
| } | |
| /////////////////////////////////////////////////////////////////////////////// | |
| /** | |
| * The output of this effect is a modulation of the input color and coverage for a circle. It | |
| * operates in a space normalized by the circle radius (outer radius in the case of a stroke) | |
| * with origin at the circle center. Two vertex attributes are used: | |
| * vec2f : position in device space of the bounding geometry vertices | |
| * vec4f : (p.xy, outerRad, innerRad) | |
| * p is the position in the normalized space. | |
| * outerRad is the outerRadius in device space. | |
| * innerRad is the innerRadius in normalized space (ignored if not stroking). | |
| */ | |
| class CircleEdgeEffect : public GrGeometryProcessor { | |
| public: | |
| static GrGeometryProcessor* Create(GrColor color, bool stroke, const SkMatrix& localMatrix) { | |
| return SkNEW_ARGS(CircleEdgeEffect, (color, stroke, localMatrix)); | |
| } | |
| const GrAttribute* inPosition() const { return fInPosition; } | |
| const GrAttribute* inCircleEdge() const { return fInCircleEdge; } | |
| virtual ~CircleEdgeEffect() {} | |
| virtual const char* name() const SK_OVERRIDE { return "CircleEdge"; } | |
| inline bool isStroked() const { return fStroke; } | |
| class GLProcessor : public GrGLGeometryProcessor { | |
| public: | |
| GLProcessor(const GrGeometryProcessor&, | |
| const GrBatchTracker&) | |
| : fColor(GrColor_ILLEGAL) {} | |
| virtual void emitCode(const EmitArgs& args) SK_OVERRIDE { | |
| const CircleEdgeEffect& ce = args.fGP.cast<CircleEdgeEffect>(); | |
| GrGLGPBuilder* pb = args.fPB; | |
| const BatchTracker& local = args.fBT.cast<BatchTracker>(); | |
| GrGLVertexBuilder* vsBuilder = args.fPB->getVertexShaderBuilder(); | |
| GrGLVertToFrag v(kVec4f_GrSLType); | |
| args.fPB->addVarying("CircleEdge", &v); | |
| vsBuilder->codeAppendf("%s = %s;", v.vsOut(), ce.inCircleEdge()->fName); | |
| // Setup pass through color | |
| this->setupColorPassThrough(pb, local.fInputColorType, args.fOutputColor, NULL, | |
| &fColorUniform); | |
| // setup coord outputs | |
| vsBuilder->codeAppendf("%s = %s;", vsBuilder->positionCoords(), ce.inPosition()->fName); | |
| vsBuilder->codeAppendf("%s = %s;", vsBuilder->localCoords(), ce.inPosition()->fName); | |
| // setup uniform viewMatrix | |
| this->addUniformViewMatrix(pb); | |
| // setup position varying | |
| vsBuilder->codeAppendf("%s = %s * vec3(%s, 1);", vsBuilder->glPosition(), | |
| this->uViewM(), ce.inPosition()->fName); | |
| GrGLGPFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder(); | |
| fsBuilder->codeAppendf("float d = length(%s.xy);", v.fsIn()); | |
| fsBuilder->codeAppendf("float edgeAlpha = clamp(%s.z * (1.0 - d), 0.0, 1.0);", v.fsIn()); | |
| if (ce.isStroked()) { | |
| fsBuilder->codeAppendf("float innerAlpha = clamp(%s.z * (d - %s.w), 0.0, 1.0);", | |
| v.fsIn(), v.fsIn()); | |
| fsBuilder->codeAppend("edgeAlpha *= innerAlpha;"); | |
| } | |
| fsBuilder->codeAppendf("%s = vec4(edgeAlpha);", args.fOutputCoverage); | |
| } | |
| static void GenKey(const GrGeometryProcessor& processor, | |
| const GrBatchTracker& bt, | |
| const GrGLCaps&, | |
| GrProcessorKeyBuilder* b) { | |
| const BatchTracker& local = bt.cast<BatchTracker>(); | |
| const CircleEdgeEffect& circleEffect = processor.cast<CircleEdgeEffect>(); | |
| uint16_t key = circleEffect.isStroked() ? 0x1 : 0x0; | |
| key |= local.fUsesLocalCoords && processor.localMatrix().hasPerspective() ? 0x2 : 0x0; | |
| b->add32(key << 16 | local.fInputColorType); | |
| } | |
| virtual void setData(const GrGLProgramDataManager& pdman, | |
| const GrPrimitiveProcessor& gp, | |
| const GrBatchTracker& bt) SK_OVERRIDE { | |
| this->setUniformViewMatrix(pdman, gp.viewMatrix()); | |
| const BatchTracker& local = bt.cast<BatchTracker>(); | |
| if (kUniform_GrGPInput == local.fInputColorType && local.fColor != fColor) { | |
| GrGLfloat c[4]; | |
| GrColorToRGBAFloat(local.fColor, c); | |
| pdman.set4fv(fColorUniform, 1, c); | |
| fColor = local.fColor; | |
| } | |
| } | |
| private: | |
| GrColor fColor; | |
| UniformHandle fColorUniform; | |
| typedef GrGLGeometryProcessor INHERITED; | |
| }; | |
| virtual void getGLProcessorKey(const GrBatchTracker& bt, | |
| const GrGLCaps& caps, | |
| GrProcessorKeyBuilder* b) const SK_OVERRIDE { | |
| GLProcessor::GenKey(*this, bt, caps, b); | |
| } | |
| virtual GrGLGeometryProcessor* createGLInstance(const GrBatchTracker& bt) const SK_OVERRIDE { | |
| return SkNEW_ARGS(GLProcessor, (*this, bt)); | |
| } | |
| void initBatchTracker(GrBatchTracker* bt, const InitBT& init) const SK_OVERRIDE { | |
| BatchTracker* local = bt->cast<BatchTracker>(); | |
| local->fInputColorType = GetColorInputType(&local->fColor, this->color(), init, false); | |
| local->fUsesLocalCoords = init.fUsesLocalCoords; | |
| } | |
| bool onCanMakeEqual(const GrBatchTracker& m, | |
| const GrGeometryProcessor& that, | |
| const GrBatchTracker& t) const SK_OVERRIDE { | |
| const BatchTracker& mine = m.cast<BatchTracker>(); | |
| const BatchTracker& theirs = t.cast<BatchTracker>(); | |
| return CanCombineLocalMatrices(*this, mine.fUsesLocalCoords, | |
| that, theirs.fUsesLocalCoords) && | |
| CanCombineOutput(mine.fInputColorType, mine.fColor, | |
| theirs.fInputColorType, theirs.fColor); | |
| } | |
| private: | |
| CircleEdgeEffect(GrColor color, bool stroke, const SkMatrix& localMatrix) | |
| : INHERITED(color, SkMatrix::I(), localMatrix) { | |
| this->initClassID<CircleEdgeEffect>(); | |
| fInPosition = &this->addVertexAttrib(GrAttribute("inPosition", kVec2f_GrVertexAttribType)); | |
| fInCircleEdge = &this->addVertexAttrib(GrAttribute("inCircleEdge", | |
| kVec4f_GrVertexAttribType)); | |
| fStroke = stroke; | |
| } | |
| virtual bool onIsEqual(const GrGeometryProcessor& other) const SK_OVERRIDE { | |
| const CircleEdgeEffect& cee = other.cast<CircleEdgeEffect>(); | |
| return cee.fStroke == fStroke; | |
| } | |
| virtual void onGetInvariantOutputCoverage(GrInitInvariantOutput* out) const SK_OVERRIDE { | |
| out->setUnknownSingleComponent(); | |
| } | |
| struct BatchTracker { | |
| GrGPInput fInputColorType; | |
| GrColor fColor; | |
| bool fUsesLocalCoords; | |
| }; | |
| const GrAttribute* fInPosition; | |
| const GrAttribute* fInCircleEdge; | |
| bool fStroke; | |
| GR_DECLARE_GEOMETRY_PROCESSOR_TEST; | |
| typedef GrGeometryProcessor INHERITED; | |
| }; | |
| GR_DEFINE_GEOMETRY_PROCESSOR_TEST(CircleEdgeEffect); | |
| GrGeometryProcessor* CircleEdgeEffect::TestCreate(SkRandom* random, | |
| GrContext* context, | |
| const GrDrawTargetCaps&, | |
| GrTexture* textures[]) { | |
| return CircleEdgeEffect::Create(GrRandomColor(random), | |
| random->nextBool(), | |
| GrProcessorUnitTest::TestMatrix(random)); | |
| } | |
| /////////////////////////////////////////////////////////////////////////////// | |
| /** | |
| * The output of this effect is a modulation of the input color and coverage for an axis-aligned | |
| * ellipse, specified as a 2D offset from center, and the reciprocals of the outer and inner radii, | |
| * in both x and y directions. | |
| * | |
| * We are using an implicit function of x^2/a^2 + y^2/b^2 - 1 = 0. | |
| */ | |
| class EllipseEdgeEffect : public GrGeometryProcessor { | |
| public: | |
| static GrGeometryProcessor* Create(GrColor color, bool stroke, const SkMatrix& localMatrix) { | |
| return SkNEW_ARGS(EllipseEdgeEffect, (color, stroke, localMatrix)); | |
| } | |
| virtual ~EllipseEdgeEffect() {} | |
| virtual const char* name() const SK_OVERRIDE { return "EllipseEdge"; } | |
| const GrAttribute* inPosition() const { return fInPosition; } | |
| const GrAttribute* inEllipseOffset() const { return fInEllipseOffset; } | |
| const GrAttribute* inEllipseRadii() const { return fInEllipseRadii; } | |
| inline bool isStroked() const { return fStroke; } | |
| class GLProcessor : public GrGLGeometryProcessor { | |
| public: | |
| GLProcessor(const GrGeometryProcessor&, | |
| const GrBatchTracker&) | |
| : fColor(GrColor_ILLEGAL) {} | |
| virtual void emitCode(const EmitArgs& args) SK_OVERRIDE { | |
| const EllipseEdgeEffect& ee = args.fGP.cast<EllipseEdgeEffect>(); | |
| GrGLGPBuilder* pb = args.fPB; | |
| const BatchTracker& local = args.fBT.cast<BatchTracker>(); | |
| GrGLVertexBuilder* vsBuilder = args.fPB->getVertexShaderBuilder(); | |
| GrGLVertToFrag ellipseOffsets(kVec2f_GrSLType); | |
| args.fPB->addVarying("EllipseOffsets", &ellipseOffsets); | |
| vsBuilder->codeAppendf("%s = %s;", ellipseOffsets.vsOut(), | |
| ee.inEllipseOffset()->fName); | |
| GrGLVertToFrag ellipseRadii(kVec4f_GrSLType); | |
| args.fPB->addVarying("EllipseRadii", &ellipseRadii); | |
| vsBuilder->codeAppendf("%s = %s;", ellipseRadii.vsOut(), | |
| ee.inEllipseRadii()->fName); | |
| // Setup pass through color | |
| this->setupColorPassThrough(pb, local.fInputColorType, args.fOutputColor, NULL, | |
| &fColorUniform); | |
| // setup coord outputs | |
| vsBuilder->codeAppendf("%s = %s;", vsBuilder->positionCoords(), ee.inPosition()->fName); | |
| vsBuilder->codeAppendf("%s = %s;", vsBuilder->localCoords(), ee.inPosition()->fName); | |
| // setup uniform viewMatrix | |
| this->addUniformViewMatrix(pb); | |
| // setup position varying | |
| vsBuilder->codeAppendf("%s = %s * vec3(%s, 1);", vsBuilder->glPosition(), | |
| this->uViewM(), ee.inPosition()->fName); | |
| // for outer curve | |
| GrGLGPFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder(); | |
| fsBuilder->codeAppendf("vec2 scaledOffset = %s*%s.xy;", ellipseOffsets.fsIn(), | |
| ellipseRadii.fsIn()); | |
| fsBuilder->codeAppend("float test = dot(scaledOffset, scaledOffset) - 1.0;"); | |
| fsBuilder->codeAppendf("vec2 grad = 2.0*scaledOffset*%s.xy;", ellipseRadii.fsIn()); | |
| fsBuilder->codeAppend("float grad_dot = dot(grad, grad);"); | |
| // avoid calling inversesqrt on zero. | |
| fsBuilder->codeAppend("grad_dot = max(grad_dot, 1.0e-4);"); | |
| fsBuilder->codeAppend("float invlen = inversesqrt(grad_dot);"); | |
| fsBuilder->codeAppend("float edgeAlpha = clamp(0.5-test*invlen, 0.0, 1.0);"); | |
| // for inner curve | |
| if (ee.isStroked()) { | |
| fsBuilder->codeAppendf("scaledOffset = %s*%s.zw;", | |
| ellipseOffsets.fsIn(), ellipseRadii.fsIn()); | |
| fsBuilder->codeAppend("test = dot(scaledOffset, scaledOffset) - 1.0;"); | |
| fsBuilder->codeAppendf("grad = 2.0*scaledOffset*%s.zw;", | |
| ellipseRadii.fsIn()); | |
| fsBuilder->codeAppend("invlen = inversesqrt(dot(grad, grad));"); | |
| fsBuilder->codeAppend("edgeAlpha *= clamp(0.5+test*invlen, 0.0, 1.0);"); | |
| } | |
| fsBuilder->codeAppendf("%s = vec4(edgeAlpha);", args.fOutputCoverage); | |
| } | |
| static void GenKey(const GrGeometryProcessor& processor, | |
| const GrBatchTracker& bt, | |
| const GrGLCaps&, | |
| GrProcessorKeyBuilder* b) { | |
| const BatchTracker& local = bt.cast<BatchTracker>(); | |
| const EllipseEdgeEffect& ellipseEffect = processor.cast<EllipseEdgeEffect>(); | |
| uint16_t key = ellipseEffect.isStroked() ? 0x1 : 0x0; | |
| key |= local.fUsesLocalCoords && processor.localMatrix().hasPerspective() ? 0x2 : 0x0; | |
| b->add32(key << 16 | local.fInputColorType); | |
| } | |
| virtual void setData(const GrGLProgramDataManager& pdman, | |
| const GrPrimitiveProcessor& gp, | |
| const GrBatchTracker& bt) SK_OVERRIDE { | |
| this->setUniformViewMatrix(pdman, gp.viewMatrix()); | |
| const BatchTracker& local = bt.cast<BatchTracker>(); | |
| if (kUniform_GrGPInput == local.fInputColorType && local.fColor != fColor) { | |
| GrGLfloat c[4]; | |
| GrColorToRGBAFloat(local.fColor, c); | |
| pdman.set4fv(fColorUniform, 1, c); | |
| fColor = local.fColor; | |
| } | |
| } | |
| private: | |
| GrColor fColor; | |
| UniformHandle fColorUniform; | |
| typedef GrGLGeometryProcessor INHERITED; | |
| }; | |
| virtual void getGLProcessorKey(const GrBatchTracker& bt, | |
| const GrGLCaps& caps, | |
| GrProcessorKeyBuilder* b) const SK_OVERRIDE { | |
| GLProcessor::GenKey(*this, bt, caps, b); | |
| } | |
| virtual GrGLGeometryProcessor* createGLInstance(const GrBatchTracker& bt) const SK_OVERRIDE { | |
| return SkNEW_ARGS(GLProcessor, (*this, bt)); | |
| } | |
| void initBatchTracker(GrBatchTracker* bt, const InitBT& init) const SK_OVERRIDE { | |
| BatchTracker* local = bt->cast<BatchTracker>(); | |
| local->fInputColorType = GetColorInputType(&local->fColor, this->color(), init, false); | |
| local->fUsesLocalCoords = init.fUsesLocalCoords; | |
| } | |
| bool onCanMakeEqual(const GrBatchTracker& m, | |
| const GrGeometryProcessor& that, | |
| const GrBatchTracker& t) const SK_OVERRIDE { | |
| const BatchTracker& mine = m.cast<BatchTracker>(); | |
| const BatchTracker& theirs = t.cast<BatchTracker>(); | |
| return CanCombineLocalMatrices(*this, mine.fUsesLocalCoords, | |
| that, theirs.fUsesLocalCoords) && | |
| CanCombineOutput(mine.fInputColorType, mine.fColor, | |
| theirs.fInputColorType, theirs.fColor); | |
| } | |
| private: | |
| EllipseEdgeEffect(GrColor color, bool stroke, const SkMatrix& localMatrix) | |
| : INHERITED(color, SkMatrix::I(), localMatrix) { | |
| this->initClassID<EllipseEdgeEffect>(); | |
| fInPosition = &this->addVertexAttrib(GrAttribute("inPosition", kVec2f_GrVertexAttribType)); | |
| fInEllipseOffset = &this->addVertexAttrib(GrAttribute("inEllipseOffset", | |
| kVec2f_GrVertexAttribType)); | |
| fInEllipseRadii = &this->addVertexAttrib(GrAttribute("inEllipseRadii", | |
| kVec4f_GrVertexAttribType)); | |
| fStroke = stroke; | |
| } | |
| virtual bool onIsEqual(const GrGeometryProcessor& other) const SK_OVERRIDE { | |
| const EllipseEdgeEffect& eee = other.cast<EllipseEdgeEffect>(); | |
| return eee.fStroke == fStroke; | |
| } | |
| virtual void onGetInvariantOutputCoverage(GrInitInvariantOutput* out) const SK_OVERRIDE { | |
| out->setUnknownSingleComponent(); | |
| } | |
| struct BatchTracker { | |
| GrGPInput fInputColorType; | |
| GrColor fColor; | |
| bool fUsesLocalCoords; | |
| }; | |
| const GrAttribute* fInPosition; | |
| const GrAttribute* fInEllipseOffset; | |
| const GrAttribute* fInEllipseRadii; | |
| bool fStroke; | |
| GR_DECLARE_GEOMETRY_PROCESSOR_TEST; | |
| typedef GrGeometryProcessor INHERITED; | |
| }; | |
| GR_DEFINE_GEOMETRY_PROCESSOR_TEST(EllipseEdgeEffect); | |
| GrGeometryProcessor* EllipseEdgeEffect::TestCreate(SkRandom* random, | |
| GrContext* context, | |
| const GrDrawTargetCaps&, | |
| GrTexture* textures[]) { | |
| return EllipseEdgeEffect::Create(GrRandomColor(random), | |
| random->nextBool(), | |
| GrProcessorUnitTest::TestMatrix(random)); | |
| } | |
| /////////////////////////////////////////////////////////////////////////////// | |
| /** | |
| * The output of this effect is a modulation of the input color and coverage for an ellipse, | |
| * specified as a 2D offset from center for both the outer and inner paths (if stroked). The | |
| * implict equation used is for a unit circle (x^2 + y^2 - 1 = 0) and the edge corrected by | |
| * using differentials. | |
| * | |
| * The result is device-independent and can be used with any affine matrix. | |
| */ | |
| class DIEllipseEdgeEffect : public GrGeometryProcessor { | |
| public: | |
| enum Mode { kStroke = 0, kHairline, kFill }; | |
| static GrGeometryProcessor* Create(GrColor color, const SkMatrix& viewMatrix, Mode mode) { | |
| return SkNEW_ARGS(DIEllipseEdgeEffect, (color, viewMatrix, mode)); | |
| } | |
| virtual ~DIEllipseEdgeEffect() {} | |
| virtual const char* name() const SK_OVERRIDE { return "DIEllipseEdge"; } | |
| const GrAttribute* inPosition() const { return fInPosition; } | |
| const GrAttribute* inEllipseOffsets0() const { return fInEllipseOffsets0; } | |
| const GrAttribute* inEllipseOffsets1() const { return fInEllipseOffsets1; } | |
| inline Mode getMode() const { return fMode; } | |
| class GLProcessor : public GrGLGeometryProcessor { | |
| public: | |
| GLProcessor(const GrGeometryProcessor&, | |
| const GrBatchTracker&) | |
| : fColor(GrColor_ILLEGAL) {} | |
| virtual void emitCode(const EmitArgs& args) SK_OVERRIDE { | |
| const DIEllipseEdgeEffect& ee = args.fGP.cast<DIEllipseEdgeEffect>(); | |
| GrGLGPBuilder* pb = args.fPB; | |
| const BatchTracker& local = args.fBT.cast<BatchTracker>(); | |
| GrGLVertexBuilder* vsBuilder = args.fPB->getVertexShaderBuilder(); | |
| GrGLVertToFrag offsets0(kVec2f_GrSLType); | |
| args.fPB->addVarying("EllipseOffsets0", &offsets0); | |
| vsBuilder->codeAppendf("%s = %s;", offsets0.vsOut(), | |
| ee.inEllipseOffsets0()->fName); | |
| GrGLVertToFrag offsets1(kVec2f_GrSLType); | |
| args.fPB->addVarying("EllipseOffsets1", &offsets1); | |
| vsBuilder->codeAppendf("%s = %s;", offsets1.vsOut(), | |
| ee.inEllipseOffsets1()->fName); | |
| // Setup pass through color | |
| this->setupColorPassThrough(pb, local.fInputColorType, args.fOutputColor, NULL, | |
| &fColorUniform); | |
| // setup coord outputs | |
| vsBuilder->codeAppendf("%s = %s;", vsBuilder->positionCoords(), ee.inPosition()->fName); | |
| vsBuilder->codeAppendf("%s = %s;", vsBuilder->localCoords(), ee.inPosition()->fName); | |
| // setup uniform viewMatrix | |
| this->addUniformViewMatrix(pb); | |
| // setup position varying | |
| vsBuilder->codeAppendf("%s = %s * vec3(%s, 1);", vsBuilder->glPosition(), | |
| this->uViewM(), ee.inPosition()->fName); | |
| GrGLGPFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder(); | |
| SkAssertResult(fsBuilder->enableFeature( | |
| GrGLFragmentShaderBuilder::kStandardDerivatives_GLSLFeature)); | |
| // for outer curve | |
| fsBuilder->codeAppendf("vec2 scaledOffset = %s.xy;", offsets0.fsIn()); | |
| fsBuilder->codeAppend("float test = dot(scaledOffset, scaledOffset) - 1.0;"); | |
| fsBuilder->codeAppendf("vec2 duvdx = dFdx(%s);", offsets0.fsIn()); | |
| fsBuilder->codeAppendf("vec2 duvdy = dFdy(%s);", offsets0.fsIn()); | |
| fsBuilder->codeAppendf("vec2 grad = vec2(2.0*%s.x*duvdx.x + 2.0*%s.y*duvdx.y," | |
| " 2.0*%s.x*duvdy.x + 2.0*%s.y*duvdy.y);", | |
| offsets0.fsIn(), offsets0.fsIn(), offsets0.fsIn(), offsets0.fsIn()); | |
| fsBuilder->codeAppend("float grad_dot = dot(grad, grad);"); | |
| // avoid calling inversesqrt on zero. | |
| fsBuilder->codeAppend("grad_dot = max(grad_dot, 1.0e-4);"); | |
| fsBuilder->codeAppend("float invlen = inversesqrt(grad_dot);"); | |
| if (kHairline == ee.getMode()) { | |
| // can probably do this with one step | |
| fsBuilder->codeAppend("float edgeAlpha = clamp(1.0-test*invlen, 0.0, 1.0);"); | |
| fsBuilder->codeAppend("edgeAlpha *= clamp(1.0+test*invlen, 0.0, 1.0);"); | |
| } else { | |
| fsBuilder->codeAppend("float edgeAlpha = clamp(0.5-test*invlen, 0.0, 1.0);"); | |
| } | |
| // for inner curve | |
| if (kStroke == ee.getMode()) { | |
| fsBuilder->codeAppendf("scaledOffset = %s.xy;", offsets1.fsIn()); | |
| fsBuilder->codeAppend("test = dot(scaledOffset, scaledOffset) - 1.0;"); | |
| fsBuilder->codeAppendf("duvdx = dFdx(%s);", offsets1.fsIn()); | |
| fsBuilder->codeAppendf("duvdy = dFdy(%s);", offsets1.fsIn()); | |
| fsBuilder->codeAppendf("grad = vec2(2.0*%s.x*duvdx.x + 2.0*%s.y*duvdx.y," | |
| " 2.0*%s.x*duvdy.x + 2.0*%s.y*duvdy.y);", | |
| offsets1.fsIn(), offsets1.fsIn(), offsets1.fsIn(), | |
| offsets1.fsIn()); | |
| fsBuilder->codeAppend("invlen = inversesqrt(dot(grad, grad));"); | |
| fsBuilder->codeAppend("edgeAlpha *= clamp(0.5+test*invlen, 0.0, 1.0);"); | |
| } | |
| fsBuilder->codeAppendf("%s = vec4(edgeAlpha);", args.fOutputCoverage); | |
| } | |
| static void GenKey(const GrGeometryProcessor& processor, | |
| const GrBatchTracker& bt, | |
| const GrGLCaps&, | |
| GrProcessorKeyBuilder* b) { | |
| const BatchTracker& local = bt.cast<BatchTracker>(); | |
| const DIEllipseEdgeEffect& ellipseEffect = processor.cast<DIEllipseEdgeEffect>(); | |
| uint16_t key = ellipseEffect.getMode(); | |
| key |= local.fUsesLocalCoords && processor.localMatrix().hasPerspective() ? 0x1 << 8 : | |
| 0x0; | |
| b->add32(key << 16 | local.fInputColorType); | |
| } | |
| virtual void setData(const GrGLProgramDataManager& pdman, | |
| const GrPrimitiveProcessor& gp, | |
| const GrBatchTracker& bt) SK_OVERRIDE { | |
| this->setUniformViewMatrix(pdman, gp.viewMatrix()); | |
| const BatchTracker& local = bt.cast<BatchTracker>(); | |
| if (kUniform_GrGPInput == local.fInputColorType && local.fColor != fColor) { | |
| GrGLfloat c[4]; | |
| GrColorToRGBAFloat(local.fColor, c); | |
| pdman.set4fv(fColorUniform, 1, c); | |
| fColor = local.fColor; | |
| } | |
| } | |
| private: | |
| GrColor fColor; | |
| UniformHandle fColorUniform; | |
| typedef GrGLGeometryProcessor INHERITED; | |
| }; | |
| virtual void getGLProcessorKey(const GrBatchTracker& bt, | |
| const GrGLCaps& caps, | |
| GrProcessorKeyBuilder* b) const SK_OVERRIDE { | |
| GLProcessor::GenKey(*this, bt, caps, b); | |
| } | |
| virtual GrGLGeometryProcessor* createGLInstance(const GrBatchTracker& bt) const SK_OVERRIDE { | |
| return SkNEW_ARGS(GLProcessor, (*this, bt)); | |
| } | |
| void initBatchTracker(GrBatchTracker* bt, const InitBT& init) const SK_OVERRIDE { | |
| BatchTracker* local = bt->cast<BatchTracker>(); | |
| local->fInputColorType = GetColorInputType(&local->fColor, this->color(), init, false); | |
| local->fUsesLocalCoords = init.fUsesLocalCoords; | |
| } | |
| bool onCanMakeEqual(const GrBatchTracker& m, | |
| const GrGeometryProcessor& that, | |
| const GrBatchTracker& t) const SK_OVERRIDE { | |
| const BatchTracker& mine = m.cast<BatchTracker>(); | |
| const BatchTracker& theirs = t.cast<BatchTracker>(); | |
| return CanCombineLocalMatrices(*this, mine.fUsesLocalCoords, | |
| that, theirs.fUsesLocalCoords) && | |
| CanCombineOutput(mine.fInputColorType, mine.fColor, | |
| theirs.fInputColorType, theirs.fColor); | |
| } | |
| private: | |
| DIEllipseEdgeEffect(GrColor color, const SkMatrix& viewMatrix, Mode mode) | |
| : INHERITED(color, viewMatrix) { | |
| this->initClassID<DIEllipseEdgeEffect>(); | |
| fInPosition = &this->addVertexAttrib(GrAttribute("inPosition", kVec2f_GrVertexAttribType)); | |
| fInEllipseOffsets0 = &this->addVertexAttrib(GrAttribute("inEllipseOffsets0", | |
| kVec2f_GrVertexAttribType)); | |
| fInEllipseOffsets1 = &this->addVertexAttrib(GrAttribute("inEllipseOffsets1", | |
| kVec2f_GrVertexAttribType)); | |
| fMode = mode; | |
| } | |
| virtual bool onIsEqual(const GrGeometryProcessor& other) const SK_OVERRIDE { | |
| const DIEllipseEdgeEffect& eee = other.cast<DIEllipseEdgeEffect>(); | |
| return eee.fMode == fMode; | |
| } | |
| virtual void onGetInvariantOutputCoverage(GrInitInvariantOutput* out) const SK_OVERRIDE { | |
| out->setUnknownSingleComponent(); | |
| } | |
| struct BatchTracker { | |
| GrGPInput fInputColorType; | |
| GrColor fColor; | |
| bool fUsesLocalCoords; | |
| }; | |
| const GrAttribute* fInPosition; | |
| const GrAttribute* fInEllipseOffsets0; | |
| const GrAttribute* fInEllipseOffsets1; | |
| Mode fMode; | |
| GR_DECLARE_GEOMETRY_PROCESSOR_TEST; | |
| typedef GrGeometryProcessor INHERITED; | |
| }; | |
| GR_DEFINE_GEOMETRY_PROCESSOR_TEST(DIEllipseEdgeEffect); | |
| GrGeometryProcessor* DIEllipseEdgeEffect::TestCreate(SkRandom* random, | |
| GrContext* context, | |
| const GrDrawTargetCaps&, | |
| GrTexture* textures[]) { | |
| return DIEllipseEdgeEffect::Create(GrRandomColor(random), | |
| GrProcessorUnitTest::TestMatrix(random), | |
| (Mode)(random->nextRangeU(0,2))); | |
| } | |
| /////////////////////////////////////////////////////////////////////////////// | |
| void GrOvalRenderer::reset() { | |
| SkSafeSetNull(fRRectIndexBuffer); | |
| SkSafeSetNull(fStrokeRRectIndexBuffer); | |
| } | |
| bool GrOvalRenderer::drawOval(GrDrawTarget* target, | |
| GrDrawState* drawState, | |
| GrColor color, | |
| const SkMatrix& viewMatrix, | |
| bool useAA, | |
| const SkRect& oval, | |
| const SkStrokeRec& stroke) | |
| { | |
| bool useCoverageAA = useAA && | |
| !drawState->getRenderTarget()->isMultisampled() && | |
| drawState->canUseFracCoveragePrimProc(color, *target->caps()); | |
| if (!useCoverageAA) { | |
| return false; | |
| } | |
| // we can draw circles | |
| if (SkScalarNearlyEqual(oval.width(), oval.height()) && circle_stays_circle(viewMatrix)) { | |
| this->drawCircle(target, drawState, color, viewMatrix, useCoverageAA, oval, stroke); | |
| // if we have shader derivative support, render as device-independent | |
| } else if (target->caps()->shaderDerivativeSupport()) { | |
| return this->drawDIEllipse(target, drawState, color, viewMatrix, useCoverageAA, oval, | |
| stroke); | |
| // otherwise axis-aligned ellipses only | |
| } else if (viewMatrix.rectStaysRect()) { | |
| return this->drawEllipse(target, drawState, color, viewMatrix, useCoverageAA, oval, stroke); | |
| } else { | |
| return false; | |
| } | |
| return true; | |
| } | |
| /////////////////////////////////////////////////////////////////////////////// | |
| void GrOvalRenderer::drawCircle(GrDrawTarget* target, | |
| GrDrawState* drawState, | |
| GrColor color, | |
| const SkMatrix& viewMatrix, | |
| bool useCoverageAA, | |
| const SkRect& circle, | |
| const SkStrokeRec& stroke) { | |
| SkPoint center = SkPoint::Make(circle.centerX(), circle.centerY()); | |
| viewMatrix.mapPoints(¢er, 1); | |
| SkScalar radius = viewMatrix.mapRadius(SkScalarHalf(circle.width())); | |
| SkScalar strokeWidth = viewMatrix.mapRadius(stroke.getWidth()); | |
| SkMatrix invert; | |
| if (!viewMatrix.invert(&invert)) { | |
| return; | |
| } | |
| SkStrokeRec::Style style = stroke.getStyle(); | |
| bool isStrokeOnly = SkStrokeRec::kStroke_Style == style || | |
| SkStrokeRec::kHairline_Style == style; | |
| bool hasStroke = isStrokeOnly || SkStrokeRec::kStrokeAndFill_Style == style; | |
| SkScalar innerRadius = 0.0f; | |
| SkScalar outerRadius = radius; | |
| SkScalar halfWidth = 0; | |
| if (hasStroke) { | |
| if (SkScalarNearlyZero(strokeWidth)) { | |
| halfWidth = SK_ScalarHalf; | |
| } else { | |
| halfWidth = SkScalarHalf(strokeWidth); | |
| } | |
| outerRadius += halfWidth; | |
| if (isStrokeOnly) { | |
| innerRadius = radius - halfWidth; | |
| } | |
| } | |
| SkAutoTUnref<GrGeometryProcessor> gp( | |
| CircleEdgeEffect::Create(color, isStrokeOnly && innerRadius > 0,invert)); | |
| GrDrawTarget::AutoReleaseGeometry geo(target, 4, gp->getVertexStride(), 0); | |
| SkASSERT(gp->getVertexStride() == sizeof(CircleVertex)); | |
| if (!geo.succeeded()) { | |
| SkDebugf("Failed to get space for vertices!\n"); | |
| return; | |
| } | |
| CircleVertex* verts = reinterpret_cast<CircleVertex*>(geo.vertices()); | |
| // The radii are outset for two reasons. First, it allows the shader to simply perform simpler | |
| // computation because the computed alpha is zero, rather than 50%, at the radius. | |
| // Second, the outer radius is used to compute the verts of the bounding box that is rendered | |
| // and the outset ensures the box will cover all partially covered by the circle. | |
| outerRadius += SK_ScalarHalf; | |
| innerRadius -= SK_ScalarHalf; | |
| SkRect bounds = SkRect::MakeLTRB( | |
| center.fX - outerRadius, | |
| center.fY - outerRadius, | |
| center.fX + outerRadius, | |
| center.fY + outerRadius | |
| ); | |
| // The inner radius in the vertex data must be specified in normalized space. | |
| innerRadius = innerRadius / outerRadius; | |
| verts[0].fPos = SkPoint::Make(bounds.fLeft, bounds.fTop); | |
| verts[0].fOffset = SkPoint::Make(-1, -1); | |
| verts[0].fOuterRadius = outerRadius; | |
| verts[0].fInnerRadius = innerRadius; | |
| verts[1].fPos = SkPoint::Make(bounds.fLeft, bounds.fBottom); | |
| verts[1].fOffset = SkPoint::Make(-1, 1); | |
| verts[1].fOuterRadius = outerRadius; | |
| verts[1].fInnerRadius = innerRadius; | |
| verts[2].fPos = SkPoint::Make(bounds.fRight, bounds.fBottom); | |
| verts[2].fOffset = SkPoint::Make(1, 1); | |
| verts[2].fOuterRadius = outerRadius; | |
| verts[2].fInnerRadius = innerRadius; | |
| verts[3].fPos = SkPoint::Make(bounds.fRight, bounds.fTop); | |
| verts[3].fOffset = SkPoint::Make(1, -1); | |
| verts[3].fOuterRadius = outerRadius; | |
| verts[3].fInnerRadius = innerRadius; | |
| target->setIndexSourceToBuffer(fGpu->getQuadIndexBuffer()); | |
| target->drawIndexedInstances(drawState, gp, kTriangles_GrPrimitiveType, 1, 4, 6, &bounds); | |
| target->resetIndexSource(); | |
| } | |
| /////////////////////////////////////////////////////////////////////////////// | |
| bool GrOvalRenderer::drawEllipse(GrDrawTarget* target, | |
| GrDrawState* drawState, | |
| GrColor color, | |
| const SkMatrix& viewMatrix, | |
| bool useCoverageAA, | |
| const SkRect& ellipse, | |
| const SkStrokeRec& stroke) { | |
| #ifdef SK_DEBUG | |
| { | |
| // we should have checked for this previously | |
| bool isAxisAlignedEllipse = viewMatrix.rectStaysRect(); | |
| SkASSERT(useCoverageAA && isAxisAlignedEllipse); | |
| } | |
| #endif | |
| // do any matrix crunching before we reset the draw state for device coords | |
| SkPoint center = SkPoint::Make(ellipse.centerX(), ellipse.centerY()); | |
| viewMatrix.mapPoints(¢er, 1); | |
| SkScalar ellipseXRadius = SkScalarHalf(ellipse.width()); | |
| SkScalar ellipseYRadius = SkScalarHalf(ellipse.height()); | |
| SkScalar xRadius = SkScalarAbs(viewMatrix[SkMatrix::kMScaleX]*ellipseXRadius + | |
| viewMatrix[SkMatrix::kMSkewY]*ellipseYRadius); | |
| SkScalar yRadius = SkScalarAbs(viewMatrix[SkMatrix::kMSkewX]*ellipseXRadius + | |
| viewMatrix[SkMatrix::kMScaleY]*ellipseYRadius); | |
| // do (potentially) anisotropic mapping of stroke | |
| SkVector scaledStroke; | |
| SkScalar strokeWidth = stroke.getWidth(); | |
| scaledStroke.fX = SkScalarAbs(strokeWidth*(viewMatrix[SkMatrix::kMScaleX] + | |
| viewMatrix[SkMatrix::kMSkewY])); | |
| scaledStroke.fY = SkScalarAbs(strokeWidth*(viewMatrix[SkMatrix::kMSkewX] + | |
| viewMatrix[SkMatrix::kMScaleY])); | |
| SkStrokeRec::Style style = stroke.getStyle(); | |
| bool isStrokeOnly = SkStrokeRec::kStroke_Style == style || | |
| SkStrokeRec::kHairline_Style == style; | |
| bool hasStroke = isStrokeOnly || SkStrokeRec::kStrokeAndFill_Style == style; | |
| SkScalar innerXRadius = 0; | |
| SkScalar innerYRadius = 0; | |
| if (hasStroke) { | |
| if (SkScalarNearlyZero(scaledStroke.length())) { | |
| scaledStroke.set(SK_ScalarHalf, SK_ScalarHalf); | |
| } else { | |
| scaledStroke.scale(SK_ScalarHalf); | |
| } | |
| // we only handle thick strokes for near-circular ellipses | |
| if (scaledStroke.length() > SK_ScalarHalf && | |
| (SK_ScalarHalf*xRadius > yRadius || SK_ScalarHalf*yRadius > xRadius)) { | |
| return false; | |
| } | |
| // we don't handle it if curvature of the stroke is less than curvature of the ellipse | |
| if (scaledStroke.fX*(yRadius*yRadius) < (scaledStroke.fY*scaledStroke.fY)*xRadius || | |
| scaledStroke.fY*(xRadius*xRadius) < (scaledStroke.fX*scaledStroke.fX)*yRadius) { | |
| return false; | |
| } | |
| // this is legit only if scale & translation (which should be the case at the moment) | |
| if (isStrokeOnly) { | |
| innerXRadius = xRadius - scaledStroke.fX; | |
| innerYRadius = yRadius - scaledStroke.fY; | |
| } | |
| xRadius += scaledStroke.fX; | |
| yRadius += scaledStroke.fY; | |
| } | |
| SkMatrix invert; | |
| if (!viewMatrix.invert(&invert)) { | |
| return false; | |
| } | |
| SkAutoTUnref<GrGeometryProcessor> gp( | |
| EllipseEdgeEffect::Create(color, | |
| isStrokeOnly && innerXRadius > 0 && innerYRadius > 0, | |
| invert)); | |
| GrDrawTarget::AutoReleaseGeometry geo(target, 4, gp->getVertexStride(), 0); | |
| SkASSERT(gp->getVertexStride() == sizeof(EllipseVertex)); | |
| if (!geo.succeeded()) { | |
| SkDebugf("Failed to get space for vertices!\n"); | |
| return false; | |
| } | |
| EllipseVertex* verts = reinterpret_cast<EllipseVertex*>(geo.vertices()); | |
| // Compute the reciprocals of the radii here to save time in the shader | |
| SkScalar xRadRecip = SkScalarInvert(xRadius); | |
| SkScalar yRadRecip = SkScalarInvert(yRadius); | |
| SkScalar xInnerRadRecip = SkScalarInvert(innerXRadius); | |
| SkScalar yInnerRadRecip = SkScalarInvert(innerYRadius); | |
| // We've extended the outer x radius out half a pixel to antialias. | |
| // This will also expand the rect so all the pixels will be captured. | |
| // TODO: Consider if we should use sqrt(2)/2 instead | |
| xRadius += SK_ScalarHalf; | |
| yRadius += SK_ScalarHalf; | |
| SkRect bounds = SkRect::MakeLTRB( | |
| center.fX - xRadius, | |
| center.fY - yRadius, | |
| center.fX + xRadius, | |
| center.fY + yRadius | |
| ); | |
| verts[0].fPos = SkPoint::Make(bounds.fLeft, bounds.fTop); | |
| verts[0].fOffset = SkPoint::Make(-xRadius, -yRadius); | |
| verts[0].fOuterRadii = SkPoint::Make(xRadRecip, yRadRecip); | |
| verts[0].fInnerRadii = SkPoint::Make(xInnerRadRecip, yInnerRadRecip); | |
| verts[1].fPos = SkPoint::Make(bounds.fLeft, bounds.fBottom); | |
| verts[1].fOffset = SkPoint::Make(-xRadius, yRadius); | |
| verts[1].fOuterRadii = SkPoint::Make(xRadRecip, yRadRecip); | |
| verts[1].fInnerRadii = SkPoint::Make(xInnerRadRecip, yInnerRadRecip); | |
| verts[2].fPos = SkPoint::Make(bounds.fRight, bounds.fBottom); | |
| verts[2].fOffset = SkPoint::Make(xRadius, yRadius); | |
| verts[2].fOuterRadii = SkPoint::Make(xRadRecip, yRadRecip); | |
| verts[2].fInnerRadii = SkPoint::Make(xInnerRadRecip, yInnerRadRecip); | |
| verts[3].fPos = SkPoint::Make(bounds.fRight, bounds.fTop); | |
| verts[3].fOffset = SkPoint::Make(xRadius, -yRadius); | |
| verts[3].fOuterRadii = SkPoint::Make(xRadRecip, yRadRecip); | |
| verts[3].fInnerRadii = SkPoint::Make(xInnerRadRecip, yInnerRadRecip); | |
| target->setIndexSourceToBuffer(fGpu->getQuadIndexBuffer()); | |
| target->drawIndexedInstances(drawState, gp, kTriangles_GrPrimitiveType, 1, 4, 6, &bounds); | |
| target->resetIndexSource(); | |
| return true; | |
| } | |
| bool GrOvalRenderer::drawDIEllipse(GrDrawTarget* target, | |
| GrDrawState* drawState, | |
| GrColor color, | |
| const SkMatrix& viewMatrix, | |
| bool useCoverageAA, | |
| const SkRect& ellipse, | |
| const SkStrokeRec& stroke) { | |
| SkPoint center = SkPoint::Make(ellipse.centerX(), ellipse.centerY()); | |
| SkScalar xRadius = SkScalarHalf(ellipse.width()); | |
| SkScalar yRadius = SkScalarHalf(ellipse.height()); | |
| SkStrokeRec::Style style = stroke.getStyle(); | |
| DIEllipseEdgeEffect::Mode mode = (SkStrokeRec::kStroke_Style == style) ? | |
| DIEllipseEdgeEffect::kStroke : | |
| (SkStrokeRec::kHairline_Style == style) ? | |
| DIEllipseEdgeEffect::kHairline : DIEllipseEdgeEffect::kFill; | |
| SkScalar innerXRadius = 0; | |
| SkScalar innerYRadius = 0; | |
| if (SkStrokeRec::kFill_Style != style && SkStrokeRec::kHairline_Style != style) { | |
| SkScalar strokeWidth = stroke.getWidth(); | |
| if (SkScalarNearlyZero(strokeWidth)) { | |
| strokeWidth = SK_ScalarHalf; | |
| } else { | |
| strokeWidth *= SK_ScalarHalf; | |
| } | |
| // we only handle thick strokes for near-circular ellipses | |
| if (strokeWidth > SK_ScalarHalf && | |
| (SK_ScalarHalf*xRadius > yRadius || SK_ScalarHalf*yRadius > xRadius)) { | |
| return false; | |
| } | |
| // we don't handle it if curvature of the stroke is less than curvature of the ellipse | |
| if (strokeWidth*(yRadius*yRadius) < (strokeWidth*strokeWidth)*xRadius || | |
| strokeWidth*(xRadius*xRadius) < (strokeWidth*strokeWidth)*yRadius) { | |
| return false; | |
| } | |
| // set inner radius (if needed) | |
| if (SkStrokeRec::kStroke_Style == style) { | |
| innerXRadius = xRadius - strokeWidth; | |
| innerYRadius = yRadius - strokeWidth; | |
| } | |
| xRadius += strokeWidth; | |
| yRadius += strokeWidth; | |
| } | |
| if (DIEllipseEdgeEffect::kStroke == mode) { | |
| mode = (innerXRadius > 0 && innerYRadius > 0) ? DIEllipseEdgeEffect::kStroke : | |
| DIEllipseEdgeEffect::kFill; | |
| } | |
| SkScalar innerRatioX = SkScalarDiv(xRadius, innerXRadius); | |
| SkScalar innerRatioY = SkScalarDiv(yRadius, innerYRadius); | |
| SkAutoTUnref<GrGeometryProcessor> gp(DIEllipseEdgeEffect::Create(color, viewMatrix, mode)); | |
| GrDrawTarget::AutoReleaseGeometry geo(target, 4, gp->getVertexStride(), 0); | |
| SkASSERT(gp->getVertexStride() == sizeof(DIEllipseVertex)); | |
| if (!geo.succeeded()) { | |
| SkDebugf("Failed to get space for vertices!\n"); | |
| return false; | |
| } | |
| DIEllipseVertex* verts = reinterpret_cast<DIEllipseVertex*>(geo.vertices()); | |
| // This expands the outer rect so that after CTM we end up with a half-pixel border | |
| SkScalar a = viewMatrix[SkMatrix::kMScaleX]; | |
| SkScalar b = viewMatrix[SkMatrix::kMSkewX]; | |
| SkScalar c = viewMatrix[SkMatrix::kMSkewY]; | |
| SkScalar d = viewMatrix[SkMatrix::kMScaleY]; | |
| SkScalar geoDx = SkScalarDiv(SK_ScalarHalf, SkScalarSqrt(a*a + c*c)); | |
| SkScalar geoDy = SkScalarDiv(SK_ScalarHalf, SkScalarSqrt(b*b + d*d)); | |
| // This adjusts the "radius" to include the half-pixel border | |
| SkScalar offsetDx = SkScalarDiv(geoDx, xRadius); | |
| SkScalar offsetDy = SkScalarDiv(geoDy, yRadius); | |
| SkRect bounds = SkRect::MakeLTRB( | |
| center.fX - xRadius - geoDx, | |
| center.fY - yRadius - geoDy, | |
| center.fX + xRadius + geoDx, | |
| center.fY + yRadius + geoDy | |
| ); | |
| verts[0].fPos = SkPoint::Make(bounds.fLeft, bounds.fTop); | |
| verts[0].fOuterOffset = SkPoint::Make(-1.0f - offsetDx, -1.0f - offsetDy); | |
| verts[0].fInnerOffset = SkPoint::Make(-innerRatioX - offsetDx, -innerRatioY - offsetDy); | |
| verts[1].fPos = SkPoint::Make(bounds.fLeft, bounds.fBottom); | |
| verts[1].fOuterOffset = SkPoint::Make(-1.0f - offsetDx, 1.0f + offsetDy); | |
| verts[1].fInnerOffset = SkPoint::Make(-innerRatioX - offsetDx, innerRatioY + offsetDy); | |
| verts[2].fPos = SkPoint::Make(bounds.fRight, bounds.fBottom); | |
| verts[2].fOuterOffset = SkPoint::Make(1.0f + offsetDx, 1.0f + offsetDy); | |
| verts[2].fInnerOffset = SkPoint::Make(innerRatioX + offsetDx, innerRatioY + offsetDy); | |
| verts[3].fPos = SkPoint::Make(bounds.fRight, bounds.fTop); | |
| verts[3].fOuterOffset = SkPoint::Make(1.0f + offsetDx, -1.0f - offsetDy); | |
| verts[3].fInnerOffset = SkPoint::Make(innerRatioX + offsetDx, -innerRatioY - offsetDy); | |
| target->setIndexSourceToBuffer(fGpu->getQuadIndexBuffer()); | |
| target->drawIndexedInstances(drawState, gp, kTriangles_GrPrimitiveType, 1, 4, 6, &bounds); | |
| target->resetIndexSource(); | |
| return true; | |
| } | |
| /////////////////////////////////////////////////////////////////////////////// | |
| static const uint16_t gRRectIndices[] = { | |
| // corners | |
| 0, 1, 5, 0, 5, 4, | |
| 2, 3, 7, 2, 7, 6, | |
| 8, 9, 13, 8, 13, 12, | |
| 10, 11, 15, 10, 15, 14, | |
| // edges | |
| 1, 2, 6, 1, 6, 5, | |
| 4, 5, 9, 4, 9, 8, | |
| 6, 7, 11, 6, 11, 10, | |
| 9, 10, 14, 9, 14, 13, | |
| // center | |
| // we place this at the end so that we can ignore these indices when rendering stroke-only | |
| 5, 6, 10, 5, 10, 9 | |
| }; | |
| static const int kIndicesPerStrokeRRect = SK_ARRAY_COUNT(gRRectIndices) - 6; | |
| static const int kIndicesPerRRect = SK_ARRAY_COUNT(gRRectIndices); | |
| static const int kVertsPerRRect = 16; | |
| static const int kNumRRectsInIndexBuffer = 256; | |
| GrIndexBuffer* GrOvalRenderer::rRectIndexBuffer(bool isStrokeOnly) { | |
| if (isStrokeOnly) { | |
| if (NULL == fStrokeRRectIndexBuffer) { | |
| fStrokeRRectIndexBuffer = fGpu->createInstancedIndexBuffer(gRRectIndices, | |
| kIndicesPerStrokeRRect, | |
| kNumRRectsInIndexBuffer, | |
| kVertsPerRRect); | |
| } | |
| return fStrokeRRectIndexBuffer; | |
| } else { | |
| if (NULL == fRRectIndexBuffer) { | |
| fRRectIndexBuffer = fGpu->createInstancedIndexBuffer(gRRectIndices, | |
| kIndicesPerRRect, | |
| kNumRRectsInIndexBuffer, | |
| kVertsPerRRect); | |
| } | |
| return fRRectIndexBuffer; | |
| } | |
| } | |
| bool GrOvalRenderer::drawDRRect(GrDrawTarget* target, | |
| GrDrawState* drawState, | |
| GrColor color, | |
| const SkMatrix& viewMatrix, | |
| bool useAA, | |
| const SkRRect& origOuter, | |
| const SkRRect& origInner) { | |
| bool applyAA = useAA && | |
| !drawState->getRenderTarget()->isMultisampled() && | |
| drawState->canUseFracCoveragePrimProc(color, *target->caps()); | |
| GrDrawState::AutoRestoreEffects are; | |
| if (!origInner.isEmpty()) { | |
| SkTCopyOnFirstWrite<SkRRect> inner(origInner); | |
| if (!viewMatrix.isIdentity()) { | |
| if (!origInner.transform(viewMatrix, inner.writable())) { | |
| return false; | |
| } | |
| } | |
| GrPrimitiveEdgeType edgeType = applyAA ? | |
| kInverseFillAA_GrProcessorEdgeType : | |
| kInverseFillBW_GrProcessorEdgeType; | |
| // TODO this needs to be a geometry processor | |
| GrFragmentProcessor* fp = GrRRectEffect::Create(edgeType, *inner); | |
| if (NULL == fp) { | |
| return false; | |
| } | |
| are.set(drawState); | |
| drawState->addCoverageProcessor(fp)->unref(); | |
| } | |
| SkStrokeRec fillRec(SkStrokeRec::kFill_InitStyle); | |
| if (this->drawRRect(target, drawState, color, viewMatrix, useAA, origOuter, fillRec)) { | |
| return true; | |
| } | |
| SkASSERT(!origOuter.isEmpty()); | |
| SkTCopyOnFirstWrite<SkRRect> outer(origOuter); | |
| if (!viewMatrix.isIdentity()) { | |
| if (!origOuter.transform(viewMatrix, outer.writable())) { | |
| return false; | |
| } | |
| } | |
| GrPrimitiveEdgeType edgeType = applyAA ? kFillAA_GrProcessorEdgeType : | |
| kFillBW_GrProcessorEdgeType; | |
| GrFragmentProcessor* effect = GrRRectEffect::Create(edgeType, *outer); | |
| if (NULL == effect) { | |
| return false; | |
| } | |
| if (!are.isSet()) { | |
| are.set(drawState); | |
| } | |
| SkMatrix invert; | |
| if (!viewMatrix.invert(&invert)) { | |
| return false; | |
| } | |
| drawState->addCoverageProcessor(effect)->unref(); | |
| SkRect bounds = outer->getBounds(); | |
| if (applyAA) { | |
| bounds.outset(SK_ScalarHalf, SK_ScalarHalf); | |
| } | |
| target->drawRect(drawState, color, SkMatrix::I(), bounds, NULL, &invert); | |
| return true; | |
| } | |
| bool GrOvalRenderer::drawRRect(GrDrawTarget* target, | |
| GrDrawState* drawState, | |
| GrColor color, | |
| const SkMatrix& viewMatrix, | |
| bool useAA, | |
| const SkRRect& rrect, | |
| const SkStrokeRec& stroke) { | |
| if (rrect.isOval()) { | |
| return this->drawOval(target, drawState, color, viewMatrix, useAA, rrect.getBounds(), | |
| stroke); | |
| } | |
| bool useCoverageAA = useAA && | |
| !drawState->getRenderTarget()->isMultisampled() && | |
| drawState->canUseFracCoveragePrimProc(color, *target->caps()); | |
| // only anti-aliased rrects for now | |
| if (!useCoverageAA) { | |
| return false; | |
| } | |
| if (!viewMatrix.rectStaysRect() || !rrect.isSimple()) { | |
| return false; | |
| } | |
| // do any matrix crunching before we reset the draw state for device coords | |
| const SkRect& rrectBounds = rrect.getBounds(); | |
| SkRect bounds; | |
| viewMatrix.mapRect(&bounds, rrectBounds); | |
| SkVector radii = rrect.getSimpleRadii(); | |
| SkScalar xRadius = SkScalarAbs(viewMatrix[SkMatrix::kMScaleX]*radii.fX + | |
| viewMatrix[SkMatrix::kMSkewY]*radii.fY); | |
| SkScalar yRadius = SkScalarAbs(viewMatrix[SkMatrix::kMSkewX]*radii.fX + | |
| viewMatrix[SkMatrix::kMScaleY]*radii.fY); | |
| SkStrokeRec::Style style = stroke.getStyle(); | |
| // do (potentially) anisotropic mapping of stroke | |
| SkVector scaledStroke; | |
| SkScalar strokeWidth = stroke.getWidth(); | |
| bool isStrokeOnly = SkStrokeRec::kStroke_Style == style || | |
| SkStrokeRec::kHairline_Style == style; | |
| bool hasStroke = isStrokeOnly || SkStrokeRec::kStrokeAndFill_Style == style; | |
| if (hasStroke) { | |
| if (SkStrokeRec::kHairline_Style == style) { | |
| scaledStroke.set(1, 1); | |
| } else { | |
| scaledStroke.fX = SkScalarAbs(strokeWidth*(viewMatrix[SkMatrix::kMScaleX] + | |
| viewMatrix[SkMatrix::kMSkewY])); | |
| scaledStroke.fY = SkScalarAbs(strokeWidth*(viewMatrix[SkMatrix::kMSkewX] + | |
| viewMatrix[SkMatrix::kMScaleY])); | |
| } | |
| // if half of strokewidth is greater than radius, we don't handle that right now | |
| if (SK_ScalarHalf*scaledStroke.fX > xRadius || SK_ScalarHalf*scaledStroke.fY > yRadius) { | |
| return false; | |
| } | |
| } | |
| // The way the effect interpolates the offset-to-ellipse/circle-center attribute only works on | |
| // the interior of the rrect if the radii are >= 0.5. Otherwise, the inner rect of the nine- | |
| // patch will have fractional coverage. This only matters when the interior is actually filled. | |
| // We could consider falling back to rect rendering here, since a tiny radius is | |
| // indistinguishable from a square corner. | |
| if (!isStrokeOnly && (SK_ScalarHalf > xRadius || SK_ScalarHalf > yRadius)) { | |
| return false; | |
| } | |
| // reset to device coordinates | |
| SkMatrix invert; | |
| if (!viewMatrix.invert(&invert)) { | |
| SkDebugf("Failed to invert\n"); | |
| return false; | |
| } | |
| GrIndexBuffer* indexBuffer = this->rRectIndexBuffer(isStrokeOnly); | |
| if (NULL == indexBuffer) { | |
| SkDebugf("Failed to create index buffer!\n"); | |
| return false; | |
| } | |
| // if the corners are circles, use the circle renderer | |
| if ((!hasStroke || scaledStroke.fX == scaledStroke.fY) && xRadius == yRadius) { | |
| SkScalar innerRadius = 0.0f; | |
| SkScalar outerRadius = xRadius; | |
| SkScalar halfWidth = 0; | |
| if (hasStroke) { | |
| if (SkScalarNearlyZero(scaledStroke.fX)) { | |
| halfWidth = SK_ScalarHalf; | |
| } else { | |
| halfWidth = SkScalarHalf(scaledStroke.fX); | |
| } | |
| if (isStrokeOnly) { | |
| innerRadius = xRadius - halfWidth; | |
| } | |
| outerRadius += halfWidth; | |
| bounds.outset(halfWidth, halfWidth); | |
| } | |
| isStrokeOnly = (isStrokeOnly && innerRadius >= 0); | |
| SkAutoTUnref<GrGeometryProcessor> effect(CircleEdgeEffect::Create(color, | |
| isStrokeOnly, | |
| invert)); | |
| GrDrawTarget::AutoReleaseGeometry geo(target, 16, effect->getVertexStride(), 0); | |
| SkASSERT(effect->getVertexStride() == sizeof(CircleVertex)); | |
| if (!geo.succeeded()) { | |
| SkDebugf("Failed to get space for vertices!\n"); | |
| return false; | |
| } | |
| CircleVertex* verts = reinterpret_cast<CircleVertex*>(geo.vertices()); | |
| // The radii are outset for two reasons. First, it allows the shader to simply perform | |
| // simpler computation because the computed alpha is zero, rather than 50%, at the radius. | |
| // Second, the outer radius is used to compute the verts of the bounding box that is | |
| // rendered and the outset ensures the box will cover all partially covered by the rrect | |
| // corners. | |
| outerRadius += SK_ScalarHalf; | |
| innerRadius -= SK_ScalarHalf; | |
| // Expand the rect so all the pixels will be captured. | |
| bounds.outset(SK_ScalarHalf, SK_ScalarHalf); | |
| SkScalar yCoords[4] = { | |
| bounds.fTop, | |
| bounds.fTop + outerRadius, | |
| bounds.fBottom - outerRadius, | |
| bounds.fBottom | |
| }; | |
| SkScalar yOuterRadii[4] = {-1, 0, 0, 1 }; | |
| // The inner radius in the vertex data must be specified in normalized space. | |
| innerRadius = innerRadius / outerRadius; | |
| for (int i = 0; i < 4; ++i) { | |
| verts->fPos = SkPoint::Make(bounds.fLeft, yCoords[i]); | |
| verts->fOffset = SkPoint::Make(-1, yOuterRadii[i]); | |
| verts->fOuterRadius = outerRadius; | |
| verts->fInnerRadius = innerRadius; | |
| verts++; | |
| verts->fPos = SkPoint::Make(bounds.fLeft + outerRadius, yCoords[i]); | |
| verts->fOffset = SkPoint::Make(0, yOuterRadii[i]); | |
| verts->fOuterRadius = outerRadius; | |
| verts->fInnerRadius = innerRadius; | |
| verts++; | |
| verts->fPos = SkPoint::Make(bounds.fRight - outerRadius, yCoords[i]); | |
| verts->fOffset = SkPoint::Make(0, yOuterRadii[i]); | |
| verts->fOuterRadius = outerRadius; | |
| verts->fInnerRadius = innerRadius; | |
| verts++; | |
| verts->fPos = SkPoint::Make(bounds.fRight, yCoords[i]); | |
| verts->fOffset = SkPoint::Make(1, yOuterRadii[i]); | |
| verts->fOuterRadius = outerRadius; | |
| verts->fInnerRadius = innerRadius; | |
| verts++; | |
| } | |
| // drop out the middle quad if we're stroked | |
| int indexCnt = isStrokeOnly ? SK_ARRAY_COUNT(gRRectIndices) - 6 : | |
| SK_ARRAY_COUNT(gRRectIndices); | |
| target->setIndexSourceToBuffer(indexBuffer); | |
| target->drawIndexedInstances(drawState, effect, kTriangles_GrPrimitiveType, 1, 16, indexCnt, | |
| &bounds); | |
| // otherwise we use the ellipse renderer | |
| } else { | |
| SkScalar innerXRadius = 0.0f; | |
| SkScalar innerYRadius = 0.0f; | |
| if (hasStroke) { | |
| if (SkScalarNearlyZero(scaledStroke.length())) { | |
| scaledStroke.set(SK_ScalarHalf, SK_ScalarHalf); | |
| } else { | |
| scaledStroke.scale(SK_ScalarHalf); | |
| } | |
| // we only handle thick strokes for near-circular ellipses | |
| if (scaledStroke.length() > SK_ScalarHalf && | |
| (SK_ScalarHalf*xRadius > yRadius || SK_ScalarHalf*yRadius > xRadius)) { | |
| return false; | |
| } | |
| // we don't handle it if curvature of the stroke is less than curvature of the ellipse | |
| if (scaledStroke.fX*(yRadius*yRadius) < (scaledStroke.fY*scaledStroke.fY)*xRadius || | |
| scaledStroke.fY*(xRadius*xRadius) < (scaledStroke.fX*scaledStroke.fX)*yRadius) { | |
| return false; | |
| } | |
| // this is legit only if scale & translation (which should be the case at the moment) | |
| if (isStrokeOnly) { | |
| innerXRadius = xRadius - scaledStroke.fX; | |
| innerYRadius = yRadius - scaledStroke.fY; | |
| } | |
| xRadius += scaledStroke.fX; | |
| yRadius += scaledStroke.fY; | |
| bounds.outset(scaledStroke.fX, scaledStroke.fY); | |
| } | |
| isStrokeOnly = (isStrokeOnly && innerXRadius >= 0 && innerYRadius >= 0); | |
| SkAutoTUnref<GrGeometryProcessor> effect(EllipseEdgeEffect::Create(color, | |
| isStrokeOnly, | |
| invert)); | |
| GrDrawTarget::AutoReleaseGeometry geo(target, 16, effect->getVertexStride(), 0); | |
| SkASSERT(effect->getVertexStride() == sizeof(EllipseVertex)); | |
| if (!geo.succeeded()) { | |
| SkDebugf("Failed to get space for vertices!\n"); | |
| return false; | |
| } | |
| EllipseVertex* verts = reinterpret_cast<EllipseVertex*>(geo.vertices()); | |
| // Compute the reciprocals of the radii here to save time in the shader | |
| SkScalar xRadRecip = SkScalarInvert(xRadius); | |
| SkScalar yRadRecip = SkScalarInvert(yRadius); | |
| SkScalar xInnerRadRecip = SkScalarInvert(innerXRadius); | |
| SkScalar yInnerRadRecip = SkScalarInvert(innerYRadius); | |
| // Extend the radii out half a pixel to antialias. | |
| SkScalar xOuterRadius = xRadius + SK_ScalarHalf; | |
| SkScalar yOuterRadius = yRadius + SK_ScalarHalf; | |
| // Expand the rect so all the pixels will be captured. | |
| bounds.outset(SK_ScalarHalf, SK_ScalarHalf); | |
| SkScalar yCoords[4] = { | |
| bounds.fTop, | |
| bounds.fTop + yOuterRadius, | |
| bounds.fBottom - yOuterRadius, | |
| bounds.fBottom | |
| }; | |
| SkScalar yOuterOffsets[4] = { | |
| yOuterRadius, | |
| SK_ScalarNearlyZero, // we're using inversesqrt() in the shader, so can't be exactly 0 | |
| SK_ScalarNearlyZero, | |
| yOuterRadius | |
| }; | |
| for (int i = 0; i < 4; ++i) { | |
| verts->fPos = SkPoint::Make(bounds.fLeft, yCoords[i]); | |
| verts->fOffset = SkPoint::Make(xOuterRadius, yOuterOffsets[i]); | |
| verts->fOuterRadii = SkPoint::Make(xRadRecip, yRadRecip); | |
| verts->fInnerRadii = SkPoint::Make(xInnerRadRecip, yInnerRadRecip); | |
| verts++; | |
| verts->fPos = SkPoint::Make(bounds.fLeft + xOuterRadius, yCoords[i]); | |
| verts->fOffset = SkPoint::Make(SK_ScalarNearlyZero, yOuterOffsets[i]); | |
| verts->fOuterRadii = SkPoint::Make(xRadRecip, yRadRecip); | |
| verts->fInnerRadii = SkPoint::Make(xInnerRadRecip, yInnerRadRecip); | |
| verts++; | |
| verts->fPos = SkPoint::Make(bounds.fRight - xOuterRadius, yCoords[i]); | |
| verts->fOffset = SkPoint::Make(SK_ScalarNearlyZero, yOuterOffsets[i]); | |
| verts->fOuterRadii = SkPoint::Make(xRadRecip, yRadRecip); | |
| verts->fInnerRadii = SkPoint::Make(xInnerRadRecip, yInnerRadRecip); | |
| verts++; | |
| verts->fPos = SkPoint::Make(bounds.fRight, yCoords[i]); | |
| verts->fOffset = SkPoint::Make(xOuterRadius, yOuterOffsets[i]); | |
| verts->fOuterRadii = SkPoint::Make(xRadRecip, yRadRecip); | |
| verts->fInnerRadii = SkPoint::Make(xInnerRadRecip, yInnerRadRecip); | |
| verts++; | |
| } | |
| // drop out the middle quad if we're stroked | |
| int indexCnt = isStrokeOnly ? SK_ARRAY_COUNT(gRRectIndices) - 6 : | |
| SK_ARRAY_COUNT(gRRectIndices); | |
| target->setIndexSourceToBuffer(indexBuffer); | |
| target->drawIndexedInstances(drawState, effect, kTriangles_GrPrimitiveType, 1, 16, indexCnt, | |
| &bounds); | |
| } | |
| target->resetIndexSource(); | |
| return true; | |
| } |