'../src/gpu/effects/GrColorTableEffect.h',
'../src/gpu/effects/GrConvolutionEffect.cpp',
'../src/gpu/effects/GrConvolutionEffect.h',
- '../src/gpu/effects/GrGradientEffects.cpp',
- '../src/gpu/effects/GrGradientEffects.h',
'../src/gpu/effects/GrMorphologyEffect.cpp',
'../src/gpu/effects/GrMorphologyEffect.h',
'../src/gpu/effects/GrSingleTextureEffect.cpp',
SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkTwoPointRadialGradient)
SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkTwoPointConicalGradient)
SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END
+
+///////////////////////////////////////////////////////////////////////////////
+
+GrGLGradientStage::GrGLGradientStage(const GrProgramStageFactory& factory)
+ : INHERITED(factory) { }
+
+GrGLGradientStage::~GrGLGradientStage() { }
+
+void GrGLGradientStage::emitColorLookup(GrGLShaderBuilder* builder,
+ const char* tName,
+ const char* outputColor,
+ const char* samplerName) {
+ // Texture is effectively 1D so the y coordinate is 0.5, if we pack multiple
+ // gradients into a texture, we could instead pick the appropriate row here
+ builder->fSampleCoords.printf("vec2(%s, 0.5)", tName);
+ builder->fComplexCoord = true;
+ builder->emitDefaultFetch(outputColor, samplerName);
+}
+
+/////////////////////////////////////////////////////////////////////
+
+GrGradientEffect::GrGradientEffect(GrTexture* texture)
+ : fTexture (texture)
+ , fUseTexture(true) {
+ SkSafeRef(fTexture);
+}
+
+GrGradientEffect::GrGradientEffect(GrContext* ctx,
+ const SkShader& shader,
+ GrSamplerState* sampler)
+ : fTexture (NULL)
+ , fUseTexture (false) {
+ // TODO: check for simple cases where we don't need a texture:
+ //GradientInfo info;
+ //shader.asAGradient(&info);
+ //if (info.fColorCount == 2) { ...
+
+ SkBitmap bitmap;
+ shader.asABitmap(&bitmap, NULL, NULL);
+
+ GrContext::TextureCacheEntry entry = GrLockCachedBitmapTexture(ctx, bitmap,
+ sampler->textureParams());
+ fTexture = entry.texture();
+ SkSafeRef(fTexture);
+ fUseTexture = true;
+
+ // Unlock immediately, this is not great, but we don't have a way of
+ // knowing when else to unlock it currently, so it may get purged from
+ // the cache, but it'll still be ref'd until it's no longer being used.
+ GrUnlockCachedBitmapTexture(ctx, entry);
+}
+
+GrGradientEffect::~GrGradientEffect() {
+ SkSafeUnref(fTexture);
+}
+
+unsigned int GrGradientEffect::numTextures() const {
+ return fUseTexture ? 1 : 0;
+}
+
+GrTexture* GrGradientEffect::texture(unsigned int index)
+ const {
+ GrAssert(fUseTexture && 0 == index);
+ return fTexture;
+}
+
#include "SkTemplates.h"\r
#include "SkBitmapCache.h"\r
#include "SkShader.h"\r
-#include "effects/GrGradientEffects.h"\r
#include "GrSamplerState.h"\r
#include "SkGr.h"\r
+#include "gl/GrGLProgramStage.h"\r
\r
#ifndef SK_DISABLE_DITHER_32BIT_GRADIENT\r
#define USE_DITHER_32BIT_GRADIENT\r
typedef SkShader INHERITED;\r
};\r
\r
+///////////////////////////////////////////////////////////////////////////////\r
+\r
+class GrSamplerState;\r
+class GrProgramStageFactory;\r
+\r
+/*\r
+ * The intepretation of the texture matrix depends on the sample mode. The\r
+ * texture matrix is applied both when the texture coordinates are explicit\r
+ * and when vertex positions are used as texture coordinates. In the latter\r
+ * case the texture matrix is applied to the pre-view-matrix position \r
+ * values.\r
+ *\r
+ * Normal SampleMode\r
+ * The post-matrix texture coordinates are in normalize space with (0,0) at\r
+ * the top-left and (1,1) at the bottom right.\r
+ * RadialGradient\r
+ * The matrix specifies the radial gradient parameters.\r
+ * (0,0) in the post-matrix space is center of the radial gradient.\r
+ * Radial2Gradient\r
+ * Matrix transforms to space where first circle is centered at the\r
+ * origin. The second circle will be centered (x, 0) where x may be \r
+ * 0 and is provided by setRadial2Params. The post-matrix space is \r
+ * normalized such that 1 is the second radius - first radius.\r
+ * SweepGradient\r
+ * The angle from the origin of texture coordinates in post-matrix space\r
+ * determines the gradient value.\r
+ */\r
+\r
+// Base class for Gr gradient effects\r
+class GrGradientEffect : public GrCustomStage {\r
+public:\r
+\r
+ GrGradientEffect(GrTexture* texture);\r
+ GrGradientEffect(GrContext* ctx, const SkShader& shader, \r
+ GrSamplerState* sampler);\r
+\r
+ virtual ~GrGradientEffect();\r
+\r
+ unsigned int numTextures() const;\r
+ GrTexture* texture(unsigned int index) const;\r
+\r
+ bool useTexture() const { return fUseTexture; }\r
+\r
+private:\r
+\r
+ GrTexture* fTexture;\r
+ bool fUseTexture;\r
+\r
+ typedef GrCustomStage INHERITED;\r
+\r
+};\r
+\r
+///////////////////////////////////////////////////////////////////////////////\r
+\r
+// Base class for GL gradient custom stages\r
+class GrGLGradientStage : public GrGLProgramStage {\r
+public:\r
+\r
+ GrGLGradientStage(const GrProgramStageFactory& factory);\r
+ virtual ~GrGLGradientStage();\r
+\r
+ // emit code that gets a fragment's color from an expression for t; for now\r
+ // this always uses the texture, but for simpler cases we'll be able to lerp\r
+ void emitColorLookup(GrGLShaderBuilder* builder, const char* t, \r
+ const char* outputColor, const char* samplerName);\r
+\r
+private:\r
+\r
+ typedef GrGLProgramStage INHERITED;\r
+};\r
+\r
#endif\r
\r
}
}
+/////////////////////////////////////////////////////////////////////
+
+class GrGLLinearGradient : public GrGLGradientStage {
+public:
+
+ GrGLLinearGradient(const GrProgramStageFactory& factory,
+ const GrCustomStage&)
+ : INHERITED (factory) { }
+
+ virtual ~GrGLLinearGradient() { }
+
+ virtual void emitVS(GrGLShaderBuilder* builder,
+ const char* vertexCoords) SK_OVERRIDE { }
+ virtual void emitFS(GrGLShaderBuilder* builder,
+ const char* outputColor,
+ const char* inputColor,
+ const char* samplerName) SK_OVERRIDE;
+ static StageKey GenKey(const GrCustomStage& s) { return 0; }
+
+private:
+
+ typedef GrGLGradientStage INHERITED;
+};
+
+void GrGLLinearGradient::emitFS(GrGLShaderBuilder* builder,
+ const char* outputColor,
+ const char* inputColor,
+ const char* samplerName) {
+ SkString t;
+ t.printf("%s.x", builder->fSampleCoords.c_str());
+ this->emitColorLookup(builder, t.c_str(), outputColor, samplerName);
+}
+
+/////////////////////////////////////////////////////////////////////
+
+GrLinearGradient::GrLinearGradient(GrTexture* texture)
+ : INHERITED(texture) {
+}
+
+GrLinearGradient::GrLinearGradient(GrContext* ctx,
+ const SkShader& shader,
+ GrSamplerState* sampler)
+ : INHERITED(ctx, shader, sampler) {
+}
+
+GrLinearGradient::~GrLinearGradient() {
+
+}
+
+const GrProgramStageFactory& GrLinearGradient::getFactory() const {
+ return GrTProgramStageFactory<GrLinearGradient>::getInstance();
+}
+
const SkPoint fEnd;
};
+///////////////////////////////////////////////////////////////////////////////
+
+class GrGLLinearGradient;
+
+class GrLinearGradient : public GrGradientEffect {
+
+public:
+
+ GrLinearGradient(GrTexture* texture);
+ GrLinearGradient(GrContext* ctx, const SkShader& shader,
+ GrSamplerState* sampler);
+ virtual ~GrLinearGradient();
+
+ static const char* Name() { return "Linear Gradient"; }
+ virtual const GrProgramStageFactory& getFactory() const SK_OVERRIDE;
+
+ typedef GrGLLinearGradient GLProgramStage;
+
+private:
+
+ typedef GrGradientEffect INHERITED;
+};
+
+
#endif
}
}
+/////////////////////////////////////////////////////////////////////
+
+class GrGLRadialGradient : public GrGLGradientStage {
+
+public:
+
+ GrGLRadialGradient(const GrProgramStageFactory& factory,
+ const GrCustomStage&) : INHERITED (factory) { }
+ virtual ~GrGLRadialGradient() { }
+
+ virtual void emitVS(GrGLShaderBuilder* builder,
+ const char* vertexCoords) SK_OVERRIDE { }
+ virtual void emitFS(GrGLShaderBuilder* builder,
+ const char* outputColor,
+ const char* inputColor,
+ const char* samplerName) SK_OVERRIDE;
+
+ static StageKey GenKey(const GrCustomStage& s) { return 0; }
+
+private:
+
+ typedef GrGLGradientStage INHERITED;
+
+};
+
+void GrGLRadialGradient::emitFS(GrGLShaderBuilder* builder,
+ const char* outputColor,
+ const char* inputColor,
+ const char* samplerName) {
+ SkString t;
+ t.printf("length(%s.xy)", builder->fSampleCoords.c_str());
+ this->emitColorLookup(builder, t.c_str(), outputColor, samplerName);
+}
+
+
+/////////////////////////////////////////////////////////////////////
+
+
+GrRadialGradient::GrRadialGradient(GrTexture* texture)
+ : INHERITED(texture) {
+
+}
+
+GrRadialGradient::GrRadialGradient(GrContext* ctx, const SkShader& shader,
+ GrSamplerState* sampler)
+ : INHERITED(ctx, shader, sampler) {
+}
+
+GrRadialGradient::~GrRadialGradient() {
+
+}
+
+const GrProgramStageFactory& GrRadialGradient::getFactory() const {
+ return GrTProgramStageFactory<GrRadialGradient>::getInstance();
+}
+
const SkScalar fRadius;
};
+///////////////////////////////////////////////////////////////////////////////
+
+class GrGLRadialGradient;
+
+class GrRadialGradient : public GrGradientEffect {
+
+public:
+
+ GrRadialGradient(GrTexture* texture);
+ GrRadialGradient(GrContext* ctx, const SkShader& shader,
+ GrSamplerState* sampler);
+ virtual ~GrRadialGradient();
+
+ static const char* Name() { return "Radial Gradient"; }
+ virtual const GrProgramStageFactory& getFactory() const SK_OVERRIDE;
+
+ typedef GrGLRadialGradient GLProgramStage;
+
+private:
+
+ typedef GrGradientEffect INHERITED;
+};
+
#endif
}
}
+/////////////////////////////////////////////////////////////////////
+
+class GrGLSweepGradient : public GrGLGradientStage {
+
+public:
+
+ GrGLSweepGradient(const GrProgramStageFactory& factory,
+ const GrCustomStage&) : INHERITED (factory) { }
+ virtual ~GrGLSweepGradient() { }
+
+ virtual void emitVS(GrGLShaderBuilder* builder,
+ const char* vertexCoords) SK_OVERRIDE { }
+ virtual void emitFS(GrGLShaderBuilder* builder,
+ const char* outputColor,
+ const char* inputColor,
+ const char* samplerName) SK_OVERRIDE;
+
+ static StageKey GenKey(const GrCustomStage& s) { return 0; }
+
+private:
+
+ typedef GrGLGradientStage INHERITED;
+
+};
+
+void GrGLSweepGradient::emitFS(GrGLShaderBuilder* builder,
+ const char* outputColor,
+ const char* inputColor,
+ const char* samplerName) {
+ SkString t;
+ t.printf("atan(- %s.y, - %s.x) * 0.1591549430918 + 0.5",
+ builder->fSampleCoords.c_str(), builder->fSampleCoords.c_str());
+ this->emitColorLookup(builder, t.c_str(), outputColor, samplerName);
+}
+
+/////////////////////////////////////////////////////////////////////
+
+GrSweepGradient::GrSweepGradient(GrTexture* texture)
+ : INHERITED(texture) {
+
+}
+
+GrSweepGradient::GrSweepGradient(GrContext* ctx, const SkShader& shader,
+ GrSamplerState* sampler)
+ : INHERITED(ctx, shader, sampler) {
+}
+
+GrSweepGradient::~GrSweepGradient() {
+
+}
+
+const GrProgramStageFactory& GrSweepGradient::getFactory() const {
+ return GrTProgramStageFactory<GrSweepGradient>::getInstance();
+}
+
const SkPoint fCenter;
};
+///////////////////////////////////////////////////////////////////////////////
+
+class GrGLSweepGradient;
+
+class GrSweepGradient : public GrGradientEffect {
+
+public:
+
+ GrSweepGradient(GrTexture* texture);
+ GrSweepGradient(GrContext* ctx, const SkShader& shader,
+ GrSamplerState* sampler);
+ virtual ~GrSweepGradient();
+
+ static const char* Name() { return "Sweep Gradient"; }
+ virtual const GrProgramStageFactory& getFactory() const SK_OVERRIDE;
+
+ typedef GrGLSweepGradient GLProgramStage;
+
+protected:
+
+ typedef GrGradientEffect INHERITED;
+};
#endif
buffer.writeScalar(fRadius2);
}
+/////////////////////////////////////////////////////////////////////
+
+// For brevity
+typedef GrGLUniformManager::UniformHandle UniformHandle;
+static const UniformHandle kInvalidUniformHandle = GrGLUniformManager::kInvalidUniformHandle;
+
+class GrGLConical2Gradient : public GrGLGradientStage {
+
+public:
+
+ GrGLConical2Gradient(const GrProgramStageFactory& factory,
+ const GrCustomStage&);
+ virtual ~GrGLConical2Gradient() { }
+
+ virtual void setupVariables(GrGLShaderBuilder* builder) SK_OVERRIDE;
+ virtual void emitVS(GrGLShaderBuilder* builder,
+ const char* vertexCoords) SK_OVERRIDE;
+ virtual void emitFS(GrGLShaderBuilder* builder,
+ const char* outputColor,
+ const char* inputColor,
+ const char* samplerName) SK_OVERRIDE;
+ virtual void setData(const GrGLUniformManager&,
+ const GrCustomStage&,
+ const GrRenderTarget*,
+ int stageNum) SK_OVERRIDE;
+
+ static StageKey GenKey(const GrCustomStage& s) {
+ return (static_cast<const GrConical2Gradient&>(s).isDegenerate());
+ }
+
+protected:
+
+ UniformHandle fVSParamUni;
+ UniformHandle fFSParamUni;
+
+ const char* fVSVaryingName;
+ const char* fFSVaryingName;
+
+ bool fIsDegenerate;
+
+ // @{
+ /// Values last uploaded as uniforms
+
+ GrScalar fCachedCenter;
+ GrScalar fCachedRadius;
+ GrScalar fCachedDiffRadius;
+
+ // @}
+
+private:
+
+ typedef GrGLGradientStage INHERITED;
+
+};
+
+GrGLConical2Gradient::GrGLConical2Gradient(
+ const GrProgramStageFactory& factory,
+ const GrCustomStage& baseData)
+ : INHERITED(factory)
+ , fVSParamUni(kInvalidUniformHandle)
+ , fFSParamUni(kInvalidUniformHandle)
+ , fVSVaryingName(NULL)
+ , fFSVaryingName(NULL)
+ , fCachedCenter(GR_ScalarMax)
+ , fCachedRadius(-GR_ScalarMax)
+ , fCachedDiffRadius(-GR_ScalarMax) {
+
+ const GrConical2Gradient& data =
+ static_cast<const GrConical2Gradient&>(baseData);
+ fIsDegenerate = data.isDegenerate();
+}
+
+void GrGLConical2Gradient::setupVariables(GrGLShaderBuilder* builder) {
+ // 2 copies of uniform array, 1 for each of vertex & fragment shader,
+ // to work around Xoom bug. Doesn't seem to cause performance decrease
+ // in test apps, but need to keep an eye on it.
+ fVSParamUni = builder->addUniformArray(GrGLShaderBuilder::kVertex_ShaderType,
+ kFloat_GrSLType, "Conical2VSParams", 6);
+ fFSParamUni = builder->addUniformArray(GrGLShaderBuilder::kFragment_ShaderType,
+ kFloat_GrSLType, "Conical2FSParams", 6);
+
+ // For radial gradients without perspective we can pass the linear
+ // part of the quadratic as a varying.
+ if (builder->fVaryingDims == builder->fCoordDims) {
+ builder->addVarying(kFloat_GrSLType, "Conical2BCoeff",
+ &fVSVaryingName, &fFSVaryingName);
+ }
+}
+
+void GrGLConical2Gradient::emitVS(GrGLShaderBuilder* builder,
+ const char* vertexCoords) {
+ SkString* code = &builder->fVSCode;
+ SkString p2; // distance between centers
+ SkString p3; // start radius
+ SkString p5; // difference in radii (r1 - r0)
+ builder->getUniformVariable(fVSParamUni).appendArrayAccess(2, &p2);
+ builder->getUniformVariable(fVSParamUni).appendArrayAccess(3, &p3);
+ builder->getUniformVariable(fVSParamUni).appendArrayAccess(5, &p5);
+
+ // For radial gradients without perspective we can pass the linear
+ // part of the quadratic as a varying.
+ if (builder->fVaryingDims == builder->fCoordDims) {
+ // r2Var = -2 * (r2Parm[2] * varCoord.x - r2Param[3] * r2Param[5])
+ code->appendf("\t%s = -2.0 * (%s * %s.x + %s * %s);\n",
+ fVSVaryingName, p2.c_str(),
+ vertexCoords, p3.c_str(), p5.c_str());
+ }
+}
+
+void GrGLConical2Gradient::emitFS(GrGLShaderBuilder* builder,
+ const char* outputColor,
+ const char* inputColor,
+ const char* samplerName) {
+ SkString* code = &builder->fFSCode;
+
+ SkString cName("c");
+ SkString ac4Name("ac4");
+ SkString dName("d");
+ SkString qName("q");
+ SkString r0Name("r0");
+ SkString r1Name("r1");
+ SkString tName("t");
+ SkString p0; // 4a
+ SkString p1; // 1/a
+ SkString p2; // distance between centers
+ SkString p3; // start radius
+ SkString p4; // start radius squared
+ SkString p5; // difference in radii (r1 - r0)
+
+ builder->getUniformVariable(fFSParamUni).appendArrayAccess(0, &p0);
+ builder->getUniformVariable(fFSParamUni).appendArrayAccess(1, &p1);
+ builder->getUniformVariable(fFSParamUni).appendArrayAccess(2, &p2);
+ builder->getUniformVariable(fFSParamUni).appendArrayAccess(3, &p3);
+ builder->getUniformVariable(fFSParamUni).appendArrayAccess(4, &p4);
+ builder->getUniformVariable(fFSParamUni).appendArrayAccess(5, &p5);
+
+ // If we we're able to interpolate the linear component,
+ // bVar is the varying; otherwise compute it
+ SkString bVar;
+ if (builder->fCoordDims == builder->fVaryingDims) {
+ bVar = fFSVaryingName;
+ GrAssert(2 == builder->fVaryingDims);
+ } else {
+ GrAssert(3 == builder->fVaryingDims);
+ bVar = "b";
+ code->appendf("\tfloat %s = -2.0 * (%s * %s.x + %s * %s);\n",
+ bVar.c_str(), p2.c_str(), builder->fSampleCoords.c_str(),
+ p3.c_str(), p5.c_str());
+ }
+
+ // output will default to transparent black (we simply won't write anything
+ // else to it if invalid, instead of discarding or returning prematurely)
+ code->appendf("\t%s = vec4(0.0,0.0,0.0,0.0);\n", outputColor);
+
+ // c = (x^2)+(y^2) - params[4]
+ code->appendf("\tfloat %s = dot(%s, %s) - %s;\n", cName.c_str(),
+ builder->fSampleCoords.c_str(), builder->fSampleCoords.c_str(),
+ p4.c_str());
+
+ // Non-degenerate case (quadratic)
+ if (!fIsDegenerate) {
+
+ // ac4 = params[0] * c
+ code->appendf("\tfloat %s = %s * %s;\n", ac4Name.c_str(), p0.c_str(),
+ cName.c_str());
+
+ // d = b^2 - ac4
+ code->appendf("\tfloat %s = %s * %s - %s;\n", dName.c_str(),
+ bVar.c_str(), bVar.c_str(), ac4Name.c_str());
+
+ // only proceed if discriminant is >= 0
+ code->appendf("\tif (%s >= 0.0) {\n", dName.c_str());
+
+ // intermediate value we'll use to compute the roots
+ // q = -0.5 * (b +/- sqrt(d))
+ code->appendf("\t\tfloat %s = -0.5 * (%s + (%s < 0.0 ? -1.0 : 1.0)"
+ " * sqrt(%s));\n", qName.c_str(), bVar.c_str(),
+ bVar.c_str(), dName.c_str());
+
+ // compute both roots
+ // r0 = q * params[1]
+ code->appendf("\t\tfloat %s = %s * %s;\n", r0Name.c_str(),
+ qName.c_str(), p1.c_str());
+ // r1 = c / q
+ code->appendf("\t\tfloat %s = %s / %s;\n", r1Name.c_str(),
+ cName.c_str(), qName.c_str());
+
+ // Note: If there are two roots that both generate radius(t) > 0, the
+ // Canvas spec says to choose the larger t.
+
+ // so we'll look at the larger one first:
+ code->appendf("\t\tfloat %s = max(%s, %s);\n", tName.c_str(),
+ r0Name.c_str(), r1Name.c_str());
+
+ // if r(t) > 0, then we're done; t will be our x coordinate
+ code->appendf("\t\tif (%s * %s + %s > 0.0) {\n", tName.c_str(),
+ p5.c_str(), p3.c_str());
+
+ code->appendf("\t\t");
+ this->emitColorLookup(builder, tName.c_str(), outputColor, samplerName);
+
+ // otherwise, if r(t) for the larger root was <= 0, try the other root
+ code->appendf("\t\t} else {\n");
+ code->appendf("\t\t\t%s = min(%s, %s);\n", tName.c_str(),
+ r0Name.c_str(), r1Name.c_str());
+
+ // if r(t) > 0 for the smaller root, then t will be our x coordinate
+ code->appendf("\t\t\tif (%s * %s + %s > 0.0) {\n",
+ tName.c_str(), p5.c_str(), p3.c_str());
+
+ code->appendf("\t\t\t");
+ this->emitColorLookup(builder, tName.c_str(), outputColor, samplerName);
+
+ // end if (r(t) > 0) for smaller root
+ code->appendf("\t\t\t}\n");
+ // end if (r(t) > 0), else, for larger root
+ code->appendf("\t\t}\n");
+ // end if (discriminant >= 0)
+ code->appendf("\t}\n");
+ } else {
+
+ // linear case: t = -c/b
+ code->appendf("\tfloat %s = -(%s / %s);\n", tName.c_str(),
+ cName.c_str(), bVar.c_str());
+
+ // if r(t) > 0, then t will be the x coordinate
+ code->appendf("\tif (%s * %s + %s > 0.0) {\n", tName.c_str(),
+ p5.c_str(), p3.c_str());
+ code->appendf("\t");
+ this->emitColorLookup(builder, tName.c_str(), outputColor, samplerName);
+ code->appendf("\t}\n");
+ }
+}
+
+void GrGLConical2Gradient::setData(const GrGLUniformManager& uman,
+ const GrCustomStage& baseData,
+ const GrRenderTarget*,
+ int stageNum) {
+ const GrConical2Gradient& data =
+ static_cast<const GrConical2Gradient&>(baseData);
+ GrAssert(data.isDegenerate() == fIsDegenerate);
+ GrScalar centerX1 = data.center();
+ GrScalar radius0 = data.radius();
+ GrScalar diffRadius = data.diffRadius();
+
+ if (fCachedCenter != centerX1 ||
+ fCachedRadius != radius0 ||
+ fCachedDiffRadius != diffRadius) {
+
+ GrScalar a = GrMul(centerX1, centerX1) - diffRadius * diffRadius;
+
+ // When we're in the degenerate (linear) case, the second
+ // value will be INF but the program doesn't read it. (We
+ // use the same 6 uniforms even though we don't need them
+ // all in the linear case just to keep the code complexity
+ // down).
+ float values[6] = {
+ GrScalarToFloat(a * 4),
+ 1.f / (GrScalarToFloat(a)),
+ GrScalarToFloat(centerX1),
+ GrScalarToFloat(radius0),
+ GrScalarToFloat(SkScalarMul(radius0, radius0)),
+ GrScalarToFloat(diffRadius)
+ };
+
+ uman.set1fv(fVSParamUni, 0, 6, values);
+ uman.set1fv(fFSParamUni, 0, 6, values);
+ fCachedCenter = centerX1;
+ fCachedRadius = radius0;
+ fCachedDiffRadius = diffRadius;
+ }
+}
+
+
+/////////////////////////////////////////////////////////////////////
+
+GrConical2Gradient::GrConical2Gradient(GrTexture* texture,
+ GrScalar center,
+ GrScalar radius,
+ GrScalar diffRadius)
+ : INHERITED (texture)
+ , fCenterX1 (center)
+ , fRadius0 (radius)
+ , fDiffRadius (diffRadius) {
+
+}
+
+GrConical2Gradient::GrConical2Gradient(GrContext* ctx,
+ const SkShader& shader,
+ GrSamplerState* sampler,
+ SkScalar center,
+ SkScalar startRadius,
+ SkScalar diffRadius)
+ : INHERITED(ctx, shader, sampler)
+ , fCenterX1(center)
+ , fRadius0(startRadius)
+ , fDiffRadius(diffRadius) {
+}
+
+GrConical2Gradient::~GrConical2Gradient() {
+
+}
+
+
+const GrProgramStageFactory& GrConical2Gradient::getFactory() const {
+ return GrTProgramStageFactory<GrConical2Gradient>::getInstance();
+}
+
+bool GrConical2Gradient::isEqual(const GrCustomStage& sBase) const {
+ const GrConical2Gradient& s = static_cast<const GrConical2Gradient&>(sBase);
+ return (INHERITED::isEqual(sBase) &&
+ this->fCenterX1 == s.fCenterX1 &&
+ this->fRadius0 == s.fRadius0 &&
+ this->fDiffRadius == s.fDiffRadius);
+}
+
+
const SkScalar fRadius2;
};
+///////////////////////////////////////////////////////////////////////////////
+
+class GrGLConical2Gradient;
+
+class GrConical2Gradient : public GrGradientEffect {
+
+public:
+
+ GrConical2Gradient(GrTexture* texture, GrScalar center, GrScalar radius, GrScalar diffRadius);
+ GrConical2Gradient(GrContext* ctx, const SkShader& shader,
+ GrSamplerState* sampler, SkScalar center,
+ SkScalar radius, SkScalar diffRadius);
+ virtual ~GrConical2Gradient();
+
+ static const char* Name() { return "Two-Point Conical Gradient"; }
+ virtual const GrProgramStageFactory& getFactory() const SK_OVERRIDE;
+ virtual bool isEqual(const GrCustomStage&) const SK_OVERRIDE;
+
+ // The radial gradient parameters can collapse to a linear (instead of quadratic) equation.
+ bool isDegenerate() const { return SkScalarAbs(fDiffRadius) == SkScalarAbs(fCenterX1); }
+ GrScalar center() const { return fCenterX1; }
+ GrScalar diffRadius() const { return fDiffRadius; }
+ GrScalar radius() const { return fRadius0; }
+
+ typedef GrGLConical2Gradient GLProgramStage;
+
+private:
+
+ // @{
+ // Cache of values - these can change arbitrarily, EXCEPT
+ // we shouldn't change between degenerate and non-degenerate?!
+
+ GrScalar fCenterX1;
+ GrScalar fRadius0;
+ GrScalar fDiffRadius;
+
+ // @}
+
+ typedef GrGradientEffect INHERITED;
+};
+
#endif
fPtsToUnit.postScale(inv, inv);
}
+/////////////////////////////////////////////////////////////////////
+
+// For brevity
+typedef GrGLUniformManager::UniformHandle UniformHandle;
+static const UniformHandle kInvalidUniformHandle = GrGLUniformManager::kInvalidUniformHandle;
+
+class GrGLRadial2Gradient : public GrGLGradientStage {
+
+public:
+
+ GrGLRadial2Gradient(const GrProgramStageFactory& factory,
+ const GrCustomStage&);
+ virtual ~GrGLRadial2Gradient() { }
+
+ virtual void setupVariables(GrGLShaderBuilder* builder) SK_OVERRIDE;
+ virtual void emitVS(GrGLShaderBuilder* builder,
+ const char* vertexCoords) SK_OVERRIDE;
+ virtual void emitFS(GrGLShaderBuilder* builder,
+ const char* outputColor,
+ const char* inputColor,
+ const char* samplerName) SK_OVERRIDE;
+ virtual void setData(const GrGLUniformManager&,
+ const GrCustomStage&,
+ const GrRenderTarget*,
+ int stageNum) SK_OVERRIDE;
+
+ static StageKey GenKey(const GrCustomStage& s) {
+ return (static_cast<const GrRadial2Gradient&>(s).isDegenerate());
+ }
+
+protected:
+
+ UniformHandle fVSParamUni;
+ UniformHandle fFSParamUni;
+
+ const char* fVSVaryingName;
+ const char* fFSVaryingName;
+
+ bool fIsDegenerate;
+
+ // @{
+ /// Values last uploaded as uniforms
+
+ GrScalar fCachedCenter;
+ GrScalar fCachedRadius;
+ bool fCachedPosRoot;
+
+ // @}
+
+private:
+
+ typedef GrGLGradientStage INHERITED;
+
+};
+
+GrGLRadial2Gradient::GrGLRadial2Gradient(
+ const GrProgramStageFactory& factory,
+ const GrCustomStage& baseData)
+ : INHERITED(factory)
+ , fVSParamUni(kInvalidUniformHandle)
+ , fFSParamUni(kInvalidUniformHandle)
+ , fVSVaryingName(NULL)
+ , fFSVaryingName(NULL)
+ , fCachedCenter(GR_ScalarMax)
+ , fCachedRadius(-GR_ScalarMax)
+ , fCachedPosRoot(0) {
+
+ const GrRadial2Gradient& data =
+ static_cast<const GrRadial2Gradient&>(baseData);
+ fIsDegenerate = data.isDegenerate();
+}
+
+void GrGLRadial2Gradient::setupVariables(GrGLShaderBuilder* builder) {
+ // 2 copies of uniform array, 1 for each of vertex & fragment shader,
+ // to work around Xoom bug. Doesn't seem to cause performance decrease
+ // in test apps, but need to keep an eye on it.
+ fVSParamUni = builder->addUniformArray(GrGLShaderBuilder::kVertex_ShaderType,
+ kFloat_GrSLType, "Radial2VSParams", 6);
+ fFSParamUni = builder->addUniformArray(GrGLShaderBuilder::kFragment_ShaderType,
+ kFloat_GrSLType, "Radial2FSParams", 6);
+
+ // For radial gradients without perspective we can pass the linear
+ // part of the quadratic as a varying.
+ if (builder->fVaryingDims == builder->fCoordDims) {
+ builder->addVarying(kFloat_GrSLType, "Radial2BCoeff",
+ &fVSVaryingName, &fFSVaryingName);
+ }
+}
+
+void GrGLRadial2Gradient::emitVS(GrGLShaderBuilder* builder,
+ const char* vertexCoords) {
+ SkString* code = &builder->fVSCode;
+ SkString p2;
+ SkString p3;
+ builder->getUniformVariable(fVSParamUni).appendArrayAccess(2, &p2);
+ builder->getUniformVariable(fVSParamUni).appendArrayAccess(3, &p3);
+
+ // For radial gradients without perspective we can pass the linear
+ // part of the quadratic as a varying.
+ if (builder->fVaryingDims == builder->fCoordDims) {
+ // r2Var = 2 * (r2Parm[2] * varCoord.x - r2Param[3])
+ code->appendf("\t%s = 2.0 *(%s * %s.x - %s);\n",
+ fVSVaryingName, p2.c_str(),
+ vertexCoords, p3.c_str());
+ }
+}
+
+void GrGLRadial2Gradient::emitFS(GrGLShaderBuilder* builder,
+ const char* outputColor,
+ const char* inputColor,
+ const char* samplerName) {
+ SkString* code = &builder->fFSCode;
+ SkString cName("c");
+ SkString ac4Name("ac4");
+ SkString rootName("root");
+ SkString t;
+ SkString p0;
+ SkString p1;
+ SkString p2;
+ SkString p3;
+ SkString p4;
+ SkString p5;
+ builder->getUniformVariable(fFSParamUni).appendArrayAccess(0, &p0);
+ builder->getUniformVariable(fFSParamUni).appendArrayAccess(1, &p1);
+ builder->getUniformVariable(fFSParamUni).appendArrayAccess(2, &p2);
+ builder->getUniformVariable(fFSParamUni).appendArrayAccess(3, &p3);
+ builder->getUniformVariable(fFSParamUni).appendArrayAccess(4, &p4);
+ builder->getUniformVariable(fFSParamUni).appendArrayAccess(5, &p5);
+
+ // If we we're able to interpolate the linear component,
+ // bVar is the varying; otherwise compute it
+ SkString bVar;
+ if (builder->fCoordDims == builder->fVaryingDims) {
+ bVar = fFSVaryingName;
+ GrAssert(2 == builder->fVaryingDims);
+ } else {
+ GrAssert(3 == builder->fVaryingDims);
+ bVar = "b";
+ //bVar.appendS32(stageNum);
+ code->appendf("\tfloat %s = 2.0 * (%s * %s.x - %s);\n",
+ bVar.c_str(), p2.c_str(),
+ builder->fSampleCoords.c_str(), p3.c_str());
+ }
+
+ // c = (x^2)+(y^2) - params[4]
+ code->appendf("\tfloat %s = dot(%s, %s) - %s;\n",
+ cName.c_str(), builder->fSampleCoords.c_str(),
+ builder->fSampleCoords.c_str(),
+ p4.c_str());
+
+ // If we aren't degenerate, emit some extra code, and accept a slightly
+ // more complex coord.
+ if (!fIsDegenerate) {
+
+ // ac4 = 4.0 * params[0] * c
+ code->appendf("\tfloat %s = %s * 4.0 * %s;\n",
+ ac4Name.c_str(), p0.c_str(),
+ cName.c_str());
+
+ // root = sqrt(b^2-4ac)
+ // (abs to avoid exception due to fp precision)
+ code->appendf("\tfloat %s = sqrt(abs(%s*%s - %s));\n",
+ rootName.c_str(), bVar.c_str(), bVar.c_str(),
+ ac4Name.c_str());
+
+ // t is: (-b + params[5] * sqrt(b^2-4ac)) * params[1]
+ t.printf("(-%s + %s * %s) * %s", bVar.c_str(), p5.c_str(),
+ rootName.c_str(), p1.c_str());
+ } else {
+ // t is: -c/b
+ t.printf("-%s / %s", cName.c_str(), bVar.c_str());
+ }
+
+ this->emitColorLookup(builder, t.c_str(), outputColor, samplerName);
+}
+
+void GrGLRadial2Gradient::setData(const GrGLUniformManager& uman,
+ const GrCustomStage& baseData,
+ const GrRenderTarget*,
+ int stageNum) {
+ const GrRadial2Gradient& data =
+ static_cast<const GrRadial2Gradient&>(baseData);
+ GrAssert(data.isDegenerate() == fIsDegenerate);
+ GrScalar centerX1 = data.center();
+ GrScalar radius0 = data.radius();
+ if (fCachedCenter != centerX1 ||
+ fCachedRadius != radius0 ||
+ fCachedPosRoot != data.isPosRoot()) {
+
+ GrScalar a = GrMul(centerX1, centerX1) - GR_Scalar1;
+
+ // When we're in the degenerate (linear) case, the second
+ // value will be INF but the program doesn't read it. (We
+ // use the same 6 uniforms even though we don't need them
+ // all in the linear case just to keep the code complexity
+ // down).
+ float values[6] = {
+ GrScalarToFloat(a),
+ 1 / (2.f * GrScalarToFloat(a)),
+ GrScalarToFloat(centerX1),
+ GrScalarToFloat(radius0),
+ GrScalarToFloat(GrMul(radius0, radius0)),
+ data.isPosRoot() ? 1.f : -1.f
+ };
+
+ uman.set1fv(fVSParamUni, 0, 6, values);
+ uman.set1fv(fFSParamUni, 0, 6, values);
+ fCachedCenter = centerX1;
+ fCachedRadius = radius0;
+ fCachedPosRoot = data.isPosRoot();
+ }
+}
+
+
+/////////////////////////////////////////////////////////////////////
+
+GrRadial2Gradient::GrRadial2Gradient(GrTexture* texture,
+ GrScalar center,
+ GrScalar radius,
+ bool posRoot)
+ : INHERITED(texture)
+ , fCenterX1 (center)
+ , fRadius0 (radius)
+ , fPosRoot (posRoot) {
+
+}
+
+GrRadial2Gradient::GrRadial2Gradient(GrContext* ctx,
+ const SkShader& shader,
+ GrSamplerState* sampler,
+ SkScalar center,
+ SkScalar startRadius,
+ SkScalar diffRadius)
+ : INHERITED(ctx, shader, sampler)
+ , fCenterX1(center)
+ , fRadius0(startRadius)
+ , fPosRoot(diffRadius < 0) {
+}
+
+GrRadial2Gradient::~GrRadial2Gradient() {
+
+}
+
+
+const GrProgramStageFactory& GrRadial2Gradient::getFactory() const {
+ return GrTProgramStageFactory<GrRadial2Gradient>::getInstance();
+}
+
+bool GrRadial2Gradient::isEqual(const GrCustomStage& sBase) const {
+ const GrRadial2Gradient& s = static_cast<const GrRadial2Gradient&>(sBase);
+ return (INHERITED::isEqual(sBase) &&
+ this->fCenterX1 == s.fCenterX1 &&
+ this->fRadius0 == s.fRadius0 &&
+ this->fPosRoot == s.fPosRoot);
+}
+
void init();
};
+///////////////////////////////////////////////////////////////////////////////
+
+class GrGLRadial2Gradient;
+
+class GrRadial2Gradient : public GrGradientEffect {
+
+public:
+
+ GrRadial2Gradient(GrTexture* texture, GrScalar center, GrScalar radius, bool posRoot);
+ GrRadial2Gradient(GrContext* ctx, const SkShader& shader,
+ GrSamplerState* sampler, SkScalar center,
+ SkScalar radius, SkScalar diffRadius);
+ virtual ~GrRadial2Gradient();
+
+ static const char* Name() { return "Two-Point Radial Gradient"; }
+ virtual const GrProgramStageFactory& getFactory() const SK_OVERRIDE;
+ virtual bool isEqual(const GrCustomStage&) const SK_OVERRIDE;
+
+ // The radial gradient parameters can collapse to a linear (instead of quadratic) equation.
+ bool isDegenerate() const { return GR_Scalar1 == fCenterX1; }
+ GrScalar center() const { return fCenterX1; }
+ GrScalar radius() const { return fRadius0; }
+ bool isPosRoot() const { return SkToBool(fPosRoot); }
+
+ typedef GrGLRadial2Gradient GLProgramStage;
+
+private:
+
+ // @{
+ // Cache of values - these can change arbitrarily, EXCEPT
+ // we shouldn't change between degenerate and non-degenerate?!
+
+ GrScalar fCenterX1;
+ GrScalar fRadius0;
+ SkBool8 fPosRoot;
+
+ // @}
+
+ typedef GrGradientEffect INHERITED;
+};
+
#endif
#include "SkGpuDevice.h"
-#include "effects/GrGradientEffects.h"
#include "effects/GrColorTableEffect.h"
#include "effects/GrTextureDomainEffect.h"
+++ /dev/null
-/*
- * 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 "GrGradientEffects.h"
-#include "gl/GrGLProgramStage.h"
-#include "GrProgramStageFactory.h"
-#include "SkGr.h"
-#include "../core/SkShader.h"
-
-// Base class for GL gradient custom stages
-class GrGLGradientStage : public GrGLProgramStage {
-public:
-
- GrGLGradientStage(const GrProgramStageFactory& factory);
- virtual ~GrGLGradientStage();
-
- // emit code that gets a fragment's color from an expression for t; for now
- // this always uses the texture, but for simpler cases we'll be able to lerp
- void emitColorLookup(GrGLShaderBuilder* builder, const char* t,
- const char* outputColor, const char* samplerName);
-
-private:
-
- typedef GrGLProgramStage INHERITED;
-};
-
-GrGLGradientStage::GrGLGradientStage(const GrProgramStageFactory& factory)
- : INHERITED(factory) { }
-
-GrGLGradientStage::~GrGLGradientStage() { }
-
-void GrGLGradientStage::emitColorLookup(GrGLShaderBuilder* builder,
- const char* tName,
- const char* outputColor,
- const char* samplerName) {
- // Texture is effectively 1D so the y coordinate is 0.5, if we pack multiple
- // gradients into a texture, we could instead pick the appropriate row here
- builder->fSampleCoords.printf("vec2(%s, 0.5)", tName);
- builder->fComplexCoord = true;
- builder->emitDefaultFetch(outputColor, samplerName);
-}
-
-/////////////////////////////////////////////////////////////////////
-
-GrGradientEffect::GrGradientEffect(GrTexture* texture)
- : fTexture (texture)
- , fUseTexture(true) {
- SkSafeRef(fTexture);
-}
-
-GrGradientEffect::GrGradientEffect(GrContext* ctx,
- const SkShader& shader,
- GrSamplerState* sampler)
- : fTexture (NULL)
- , fUseTexture (false) {
- // TODO: check for simple cases where we don't need a texture:
- //GradientInfo info;
- //shader.asAGradient(&info);
- //if (info.fColorCount == 2) { ...
-
- SkBitmap bitmap;
- shader.asABitmap(&bitmap, NULL, NULL);
-
- GrContext::TextureCacheEntry entry = GrLockCachedBitmapTexture(ctx, bitmap,
- sampler->textureParams());
- fTexture = entry.texture();
- SkSafeRef(fTexture);
- fUseTexture = true;
-
- // Unlock immediately, this is not great, but we don't have a way of
- // knowing when else to unlock it currently, so it may get purged from
- // the cache, but it'll still be ref'd until it's no longer being used.
- GrUnlockCachedBitmapTexture(ctx, entry);
-}
-
-GrGradientEffect::~GrGradientEffect() {
- SkSafeUnref(fTexture);
-}
-
-unsigned int GrGradientEffect::numTextures() const {
- return fUseTexture ? 1 : 0;
-}
-
-GrTexture* GrGradientEffect::texture(unsigned int index)
- const {
- GrAssert(fUseTexture && 0 == index);
- return fTexture;
-}
-
-/////////////////////////////////////////////////////////////////////
-
-class GrGLLinearGradient : public GrGLGradientStage {
-public:
-
- GrGLLinearGradient(const GrProgramStageFactory& factory,
- const GrCustomStage&)
- : INHERITED (factory) { }
-
- virtual ~GrGLLinearGradient() { }
-
- virtual void emitVS(GrGLShaderBuilder* builder,
- const char* vertexCoords) SK_OVERRIDE { }
- virtual void emitFS(GrGLShaderBuilder* builder,
- const char* outputColor,
- const char* inputColor,
- const char* samplerName) SK_OVERRIDE;
- static StageKey GenKey(const GrCustomStage& s) { return 0; }
-
-private:
-
- typedef GrGLGradientStage INHERITED;
-};
-
-void GrGLLinearGradient::emitFS(GrGLShaderBuilder* builder,
- const char* outputColor,
- const char* inputColor,
- const char* samplerName) {
- SkString t;
- t.printf("%s.x", builder->fSampleCoords.c_str());
- this->emitColorLookup(builder, t.c_str(), outputColor, samplerName);
-}
-
-/////////////////////////////////////////////////////////////////////
-
-GrLinearGradient::GrLinearGradient(GrTexture* texture)
- : INHERITED(texture) {
-}
-
-GrLinearGradient::GrLinearGradient(GrContext* ctx,
- const SkShader& shader,
- GrSamplerState* sampler)
- : INHERITED(ctx, shader, sampler) {
-}
-
-GrLinearGradient::~GrLinearGradient() {
-
-}
-
-const GrProgramStageFactory& GrLinearGradient::getFactory() const {
- return GrTProgramStageFactory<GrLinearGradient>::getInstance();
-}
-
-/////////////////////////////////////////////////////////////////////
-
-class GrGLRadialGradient : public GrGLGradientStage {
-
-public:
-
- GrGLRadialGradient(const GrProgramStageFactory& factory,
- const GrCustomStage&) : INHERITED (factory) { }
- virtual ~GrGLRadialGradient() { }
-
- virtual void emitVS(GrGLShaderBuilder* builder,
- const char* vertexCoords) SK_OVERRIDE { }
- virtual void emitFS(GrGLShaderBuilder* builder,
- const char* outputColor,
- const char* inputColor,
- const char* samplerName) SK_OVERRIDE;
-
- static StageKey GenKey(const GrCustomStage& s) { return 0; }
-
-private:
-
- typedef GrGLGradientStage INHERITED;
-
-};
-
-void GrGLRadialGradient::emitFS(GrGLShaderBuilder* builder,
- const char* outputColor,
- const char* inputColor,
- const char* samplerName) {
- SkString t;
- t.printf("length(%s.xy)", builder->fSampleCoords.c_str());
- this->emitColorLookup(builder, t.c_str(), outputColor, samplerName);
-}
-
-
-/////////////////////////////////////////////////////////////////////
-
-
-GrRadialGradient::GrRadialGradient(GrTexture* texture)
- : INHERITED(texture) {
-
-}
-
-GrRadialGradient::GrRadialGradient(GrContext* ctx, const SkShader& shader,
- GrSamplerState* sampler)
- : INHERITED(ctx, shader, sampler) {
-}
-
-GrRadialGradient::~GrRadialGradient() {
-
-}
-
-const GrProgramStageFactory& GrRadialGradient::getFactory() const {
- return GrTProgramStageFactory<GrRadialGradient>::getInstance();
-}
-
-/////////////////////////////////////////////////////////////////////
-
-// For brevity
-typedef GrGLUniformManager::UniformHandle UniformHandle;
-static const UniformHandle kInvalidUniformHandle = GrGLUniformManager::kInvalidUniformHandle;
-
-class GrGLRadial2Gradient : public GrGLGradientStage {
-
-public:
-
- GrGLRadial2Gradient(const GrProgramStageFactory& factory,
- const GrCustomStage&);
- virtual ~GrGLRadial2Gradient() { }
-
- virtual void setupVariables(GrGLShaderBuilder* builder) SK_OVERRIDE;
- virtual void emitVS(GrGLShaderBuilder* builder,
- const char* vertexCoords) SK_OVERRIDE;
- virtual void emitFS(GrGLShaderBuilder* builder,
- const char* outputColor,
- const char* inputColor,
- const char* samplerName) SK_OVERRIDE;
- virtual void setData(const GrGLUniformManager&,
- const GrCustomStage&,
- const GrRenderTarget*,
- int stageNum) SK_OVERRIDE;
-
- static StageKey GenKey(const GrCustomStage& s) {
- return (static_cast<const GrRadial2Gradient&>(s).isDegenerate());
- }
-
-protected:
-
- UniformHandle fVSParamUni;
- UniformHandle fFSParamUni;
-
- const char* fVSVaryingName;
- const char* fFSVaryingName;
-
- bool fIsDegenerate;
-
- // @{
- /// Values last uploaded as uniforms
-
- GrScalar fCachedCenter;
- GrScalar fCachedRadius;
- bool fCachedPosRoot;
-
- // @}
-
-private:
-
- typedef GrGLGradientStage INHERITED;
-
-};
-
-GrGLRadial2Gradient::GrGLRadial2Gradient(
- const GrProgramStageFactory& factory,
- const GrCustomStage& baseData)
- : INHERITED(factory)
- , fVSParamUni(kInvalidUniformHandle)
- , fFSParamUni(kInvalidUniformHandle)
- , fVSVaryingName(NULL)
- , fFSVaryingName(NULL)
- , fCachedCenter(GR_ScalarMax)
- , fCachedRadius(-GR_ScalarMax)
- , fCachedPosRoot(0) {
-
- const GrRadial2Gradient& data =
- static_cast<const GrRadial2Gradient&>(baseData);
- fIsDegenerate = data.isDegenerate();
-}
-
-void GrGLRadial2Gradient::setupVariables(GrGLShaderBuilder* builder) {
- // 2 copies of uniform array, 1 for each of vertex & fragment shader,
- // to work around Xoom bug. Doesn't seem to cause performance decrease
- // in test apps, but need to keep an eye on it.
- fVSParamUni = builder->addUniformArray(GrGLShaderBuilder::kVertex_ShaderType,
- kFloat_GrSLType, "Radial2VSParams", 6);
- fFSParamUni = builder->addUniformArray(GrGLShaderBuilder::kFragment_ShaderType,
- kFloat_GrSLType, "Radial2FSParams", 6);
-
- // For radial gradients without perspective we can pass the linear
- // part of the quadratic as a varying.
- if (builder->fVaryingDims == builder->fCoordDims) {
- builder->addVarying(kFloat_GrSLType, "Radial2BCoeff",
- &fVSVaryingName, &fFSVaryingName);
- }
-}
-
-void GrGLRadial2Gradient::emitVS(GrGLShaderBuilder* builder,
- const char* vertexCoords) {
- SkString* code = &builder->fVSCode;
- SkString p2;
- SkString p3;
- builder->getUniformVariable(fVSParamUni).appendArrayAccess(2, &p2);
- builder->getUniformVariable(fVSParamUni).appendArrayAccess(3, &p3);
-
- // For radial gradients without perspective we can pass the linear
- // part of the quadratic as a varying.
- if (builder->fVaryingDims == builder->fCoordDims) {
- // r2Var = 2 * (r2Parm[2] * varCoord.x - r2Param[3])
- code->appendf("\t%s = 2.0 *(%s * %s.x - %s);\n",
- fVSVaryingName, p2.c_str(),
- vertexCoords, p3.c_str());
- }
-}
-
-void GrGLRadial2Gradient::emitFS(GrGLShaderBuilder* builder,
- const char* outputColor,
- const char* inputColor,
- const char* samplerName) {
- SkString* code = &builder->fFSCode;
- SkString cName("c");
- SkString ac4Name("ac4");
- SkString rootName("root");
- SkString t;
- SkString p0;
- SkString p1;
- SkString p2;
- SkString p3;
- SkString p4;
- SkString p5;
- builder->getUniformVariable(fFSParamUni).appendArrayAccess(0, &p0);
- builder->getUniformVariable(fFSParamUni).appendArrayAccess(1, &p1);
- builder->getUniformVariable(fFSParamUni).appendArrayAccess(2, &p2);
- builder->getUniformVariable(fFSParamUni).appendArrayAccess(3, &p3);
- builder->getUniformVariable(fFSParamUni).appendArrayAccess(4, &p4);
- builder->getUniformVariable(fFSParamUni).appendArrayAccess(5, &p5);
-
- // If we we're able to interpolate the linear component,
- // bVar is the varying; otherwise compute it
- SkString bVar;
- if (builder->fCoordDims == builder->fVaryingDims) {
- bVar = fFSVaryingName;
- GrAssert(2 == builder->fVaryingDims);
- } else {
- GrAssert(3 == builder->fVaryingDims);
- bVar = "b";
- //bVar.appendS32(stageNum);
- code->appendf("\tfloat %s = 2.0 * (%s * %s.x - %s);\n",
- bVar.c_str(), p2.c_str(),
- builder->fSampleCoords.c_str(), p3.c_str());
- }
-
- // c = (x^2)+(y^2) - params[4]
- code->appendf("\tfloat %s = dot(%s, %s) - %s;\n",
- cName.c_str(), builder->fSampleCoords.c_str(),
- builder->fSampleCoords.c_str(),
- p4.c_str());
-
- // If we aren't degenerate, emit some extra code, and accept a slightly
- // more complex coord.
- if (!fIsDegenerate) {
-
- // ac4 = 4.0 * params[0] * c
- code->appendf("\tfloat %s = %s * 4.0 * %s;\n",
- ac4Name.c_str(), p0.c_str(),
- cName.c_str());
-
- // root = sqrt(b^2-4ac)
- // (abs to avoid exception due to fp precision)
- code->appendf("\tfloat %s = sqrt(abs(%s*%s - %s));\n",
- rootName.c_str(), bVar.c_str(), bVar.c_str(),
- ac4Name.c_str());
-
- // t is: (-b + params[5] * sqrt(b^2-4ac)) * params[1]
- t.printf("(-%s + %s * %s) * %s", bVar.c_str(), p5.c_str(),
- rootName.c_str(), p1.c_str());
- } else {
- // t is: -c/b
- t.printf("-%s / %s", cName.c_str(), bVar.c_str());
- }
-
- this->emitColorLookup(builder, t.c_str(), outputColor, samplerName);
-}
-
-void GrGLRadial2Gradient::setData(const GrGLUniformManager& uman,
- const GrCustomStage& baseData,
- const GrRenderTarget*,
- int stageNum) {
- const GrRadial2Gradient& data =
- static_cast<const GrRadial2Gradient&>(baseData);
- GrAssert(data.isDegenerate() == fIsDegenerate);
- GrScalar centerX1 = data.center();
- GrScalar radius0 = data.radius();
- if (fCachedCenter != centerX1 ||
- fCachedRadius != radius0 ||
- fCachedPosRoot != data.isPosRoot()) {
-
- GrScalar a = GrMul(centerX1, centerX1) - GR_Scalar1;
-
- // When we're in the degenerate (linear) case, the second
- // value will be INF but the program doesn't read it. (We
- // use the same 6 uniforms even though we don't need them
- // all in the linear case just to keep the code complexity
- // down).
- float values[6] = {
- GrScalarToFloat(a),
- 1 / (2.f * GrScalarToFloat(a)),
- GrScalarToFloat(centerX1),
- GrScalarToFloat(radius0),
- GrScalarToFloat(GrMul(radius0, radius0)),
- data.isPosRoot() ? 1.f : -1.f
- };
-
- uman.set1fv(fVSParamUni, 0, 6, values);
- uman.set1fv(fFSParamUni, 0, 6, values);
- fCachedCenter = centerX1;
- fCachedRadius = radius0;
- fCachedPosRoot = data.isPosRoot();
- }
-}
-
-
-/////////////////////////////////////////////////////////////////////
-
-GrRadial2Gradient::GrRadial2Gradient(GrTexture* texture,
- GrScalar center,
- GrScalar radius,
- bool posRoot)
- : INHERITED(texture)
- , fCenterX1 (center)
- , fRadius0 (radius)
- , fPosRoot (posRoot) {
-
-}
-
-GrRadial2Gradient::GrRadial2Gradient(GrContext* ctx,
- const SkShader& shader,
- GrSamplerState* sampler,
- SkScalar center,
- SkScalar startRadius,
- SkScalar diffRadius)
- : INHERITED(ctx, shader, sampler)
- , fCenterX1(center)
- , fRadius0(startRadius)
- , fPosRoot(diffRadius < 0) {
-}
-
-GrRadial2Gradient::~GrRadial2Gradient() {
-
-}
-
-
-const GrProgramStageFactory& GrRadial2Gradient::getFactory() const {
- return GrTProgramStageFactory<GrRadial2Gradient>::getInstance();
-}
-
-bool GrRadial2Gradient::isEqual(const GrCustomStage& sBase) const {
- const GrRadial2Gradient& s = static_cast<const GrRadial2Gradient&>(sBase);
- return (INHERITED::isEqual(sBase) &&
- this->fCenterX1 == s.fCenterX1 &&
- this->fRadius0 == s.fRadius0 &&
- this->fPosRoot == s.fPosRoot);
-}
-
-/////////////////////////////////////////////////////////////////////
-
-class GrGLConical2Gradient : public GrGLGradientStage {
-
-public:
-
- GrGLConical2Gradient(const GrProgramStageFactory& factory,
- const GrCustomStage&);
- virtual ~GrGLConical2Gradient() { }
-
- virtual void setupVariables(GrGLShaderBuilder* builder) SK_OVERRIDE;
- virtual void emitVS(GrGLShaderBuilder* builder,
- const char* vertexCoords) SK_OVERRIDE;
- virtual void emitFS(GrGLShaderBuilder* builder,
- const char* outputColor,
- const char* inputColor,
- const char* samplerName) SK_OVERRIDE;
- virtual void setData(const GrGLUniformManager&,
- const GrCustomStage&,
- const GrRenderTarget*,
- int stageNum) SK_OVERRIDE;
-
- static StageKey GenKey(const GrCustomStage& s) {
- return (static_cast<const GrConical2Gradient&>(s).isDegenerate());
- }
-
-protected:
-
- UniformHandle fVSParamUni;
- GrGLint fVSParamLocation;
- UniformHandle fFSParamUni;
- GrGLint fFSParamLocation;
-
- const char* fVSVaryingName;
- const char* fFSVaryingName;
-
- bool fIsDegenerate;
-
- // @{
- /// Values last uploaded as uniforms
-
- GrScalar fCachedCenter;
- GrScalar fCachedRadius;
- GrScalar fCachedDiffRadius;
-
- // @}
-
-private:
-
- typedef GrGLGradientStage INHERITED;
-
-};
-
-GrGLConical2Gradient::GrGLConical2Gradient(
- const GrProgramStageFactory& factory,
- const GrCustomStage& baseData)
- : INHERITED(factory)
- , fVSParamUni(kInvalidUniformHandle)
- , fFSParamUni(kInvalidUniformHandle)
- , fVSVaryingName(NULL)
- , fFSVaryingName(NULL)
- , fCachedCenter(GR_ScalarMax)
- , fCachedRadius(-GR_ScalarMax)
- , fCachedDiffRadius(-GR_ScalarMax) {
-
- const GrConical2Gradient& data =
- static_cast<const GrConical2Gradient&>(baseData);
- fIsDegenerate = data.isDegenerate();
-}
-
-void GrGLConical2Gradient::setupVariables(GrGLShaderBuilder* builder) {
- // 2 copies of uniform array, 1 for each of vertex & fragment shader,
- // to work around Xoom bug. Doesn't seem to cause performance decrease
- // in test apps, but need to keep an eye on it.
- fVSParamUni = builder->addUniformArray(GrGLShaderBuilder::kVertex_ShaderType,
- kFloat_GrSLType, "Conical2VSParams", 6);
- fFSParamUni = builder->addUniformArray(GrGLShaderBuilder::kFragment_ShaderType,
- kFloat_GrSLType, "Conical2FSParams", 6);
-
- fVSParamLocation = GrGLProgramStage::kUseUniform;
- fFSParamLocation = GrGLProgramStage::kUseUniform;
-
- // For radial gradients without perspective we can pass the linear
- // part of the quadratic as a varying.
- if (builder->fVaryingDims == builder->fCoordDims) {
- builder->addVarying(kFloat_GrSLType, "Conical2BCoeff",
- &fVSVaryingName, &fFSVaryingName);
- }
-}
-
-void GrGLConical2Gradient::emitVS(GrGLShaderBuilder* builder,
- const char* vertexCoords) {
- SkString* code = &builder->fVSCode;
- SkString p2; // distance between centers
- SkString p3; // start radius
- SkString p5; // difference in radii (r1 - r0)
- builder->getUniformVariable(fVSParamUni).appendArrayAccess(2, &p2);
- builder->getUniformVariable(fVSParamUni).appendArrayAccess(3, &p3);
- builder->getUniformVariable(fVSParamUni).appendArrayAccess(5, &p5);
-
- // For radial gradients without perspective we can pass the linear
- // part of the quadratic as a varying.
- if (builder->fVaryingDims == builder->fCoordDims) {
- // r2Var = -2 * (r2Parm[2] * varCoord.x - r2Param[3] * r2Param[5])
- code->appendf("\t%s = -2.0 * (%s * %s.x + %s * %s);\n",
- fVSVaryingName, p2.c_str(),
- vertexCoords, p3.c_str(), p5.c_str());
- }
-}
-
-void GrGLConical2Gradient::emitFS(GrGLShaderBuilder* builder,
- const char* outputColor,
- const char* inputColor,
- const char* samplerName) {
- SkString* code = &builder->fFSCode;
-
- SkString cName("c");
- SkString ac4Name("ac4");
- SkString dName("d");
- SkString qName("q");
- SkString r0Name("r0");
- SkString r1Name("r1");
- SkString tName("t");
- SkString p0; // 4a
- SkString p1; // 1/a
- SkString p2; // distance between centers
- SkString p3; // start radius
- SkString p4; // start radius squared
- SkString p5; // difference in radii (r1 - r0)
-
- builder->getUniformVariable(fFSParamUni).appendArrayAccess(0, &p0);
- builder->getUniformVariable(fFSParamUni).appendArrayAccess(1, &p1);
- builder->getUniformVariable(fFSParamUni).appendArrayAccess(2, &p2);
- builder->getUniformVariable(fFSParamUni).appendArrayAccess(3, &p3);
- builder->getUniformVariable(fFSParamUni).appendArrayAccess(4, &p4);
- builder->getUniformVariable(fFSParamUni).appendArrayAccess(5, &p5);
-
- // If we we're able to interpolate the linear component,
- // bVar is the varying; otherwise compute it
- SkString bVar;
- if (builder->fCoordDims == builder->fVaryingDims) {
- bVar = fFSVaryingName;
- GrAssert(2 == builder->fVaryingDims);
- } else {
- GrAssert(3 == builder->fVaryingDims);
- bVar = "b";
- code->appendf("\tfloat %s = -2.0 * (%s * %s.x + %s * %s);\n",
- bVar.c_str(), p2.c_str(), builder->fSampleCoords.c_str(),
- p3.c_str(), p5.c_str());
- }
-
- // output will default to transparent black (we simply won't write anything
- // else to it if invalid, instead of discarding or returning prematurely)
- code->appendf("\t%s = vec4(0.0,0.0,0.0,0.0);\n", outputColor);
-
- // c = (x^2)+(y^2) - params[4]
- code->appendf("\tfloat %s = dot(%s, %s) - %s;\n", cName.c_str(),
- builder->fSampleCoords.c_str(), builder->fSampleCoords.c_str(),
- p4.c_str());
-
- // Non-degenerate case (quadratic)
- if (!fIsDegenerate) {
-
- // ac4 = params[0] * c
- code->appendf("\tfloat %s = %s * %s;\n", ac4Name.c_str(), p0.c_str(),
- cName.c_str());
-
- // d = b^2 - ac4
- code->appendf("\tfloat %s = %s * %s - %s;\n", dName.c_str(),
- bVar.c_str(), bVar.c_str(), ac4Name.c_str());
-
- // only proceed if discriminant is >= 0
- code->appendf("\tif (%s >= 0.0) {\n", dName.c_str());
-
- // intermediate value we'll use to compute the roots
- // q = -0.5 * (b +/- sqrt(d))
- code->appendf("\t\tfloat %s = -0.5 * (%s + (%s < 0.0 ? -1.0 : 1.0)"
- " * sqrt(%s));\n", qName.c_str(), bVar.c_str(),
- bVar.c_str(), dName.c_str());
-
- // compute both roots
- // r0 = q * params[1]
- code->appendf("\t\tfloat %s = %s * %s;\n", r0Name.c_str(),
- qName.c_str(), p1.c_str());
- // r1 = c / q
- code->appendf("\t\tfloat %s = %s / %s;\n", r1Name.c_str(),
- cName.c_str(), qName.c_str());
-
- // Note: If there are two roots that both generate radius(t) > 0, the
- // Canvas spec says to choose the larger t.
-
- // so we'll look at the larger one first:
- code->appendf("\t\tfloat %s = max(%s, %s);\n", tName.c_str(),
- r0Name.c_str(), r1Name.c_str());
-
- // if r(t) > 0, then we're done; t will be our x coordinate
- code->appendf("\t\tif (%s * %s + %s > 0.0) {\n", tName.c_str(),
- p5.c_str(), p3.c_str());
-
- code->appendf("\t\t");
- this->emitColorLookup(builder, tName.c_str(), outputColor, samplerName);
-
- // otherwise, if r(t) for the larger root was <= 0, try the other root
- code->appendf("\t\t} else {\n");
- code->appendf("\t\t\t%s = min(%s, %s);\n", tName.c_str(),
- r0Name.c_str(), r1Name.c_str());
-
- // if r(t) > 0 for the smaller root, then t will be our x coordinate
- code->appendf("\t\t\tif (%s * %s + %s > 0.0) {\n",
- tName.c_str(), p5.c_str(), p3.c_str());
-
- code->appendf("\t\t\t");
- this->emitColorLookup(builder, tName.c_str(), outputColor, samplerName);
-
- // end if (r(t) > 0) for smaller root
- code->appendf("\t\t\t}\n");
- // end if (r(t) > 0), else, for larger root
- code->appendf("\t\t}\n");
- // end if (discriminant >= 0)
- code->appendf("\t}\n");
- } else {
-
- // linear case: t = -c/b
- code->appendf("\tfloat %s = -(%s / %s);\n", tName.c_str(),
- cName.c_str(), bVar.c_str());
-
- // if r(t) > 0, then t will be the x coordinate
- code->appendf("\tif (%s * %s + %s > 0.0) {\n", tName.c_str(),
- p5.c_str(), p3.c_str());
- code->appendf("\t");
- this->emitColorLookup(builder, tName.c_str(), outputColor, samplerName);
- code->appendf("\t}\n");
- }
-}
-
-void GrGLConical2Gradient::setData(const GrGLUniformManager& uman,
- const GrCustomStage& baseData,
- const GrRenderTarget*,
- int stageNum) {
- const GrConical2Gradient& data =
- static_cast<const GrConical2Gradient&>(baseData);
- GrAssert(data.isDegenerate() == fIsDegenerate);
- GrScalar centerX1 = data.center();
- GrScalar radius0 = data.radius();
- GrScalar diffRadius = data.diffRadius();
-
- if (fCachedCenter != centerX1 ||
- fCachedRadius != radius0 ||
- fCachedDiffRadius != diffRadius) {
-
- GrScalar a = GrMul(centerX1, centerX1) - diffRadius * diffRadius;
-
- // When we're in the degenerate (linear) case, the second
- // value will be INF but the program doesn't read it. (We
- // use the same 6 uniforms even though we don't need them
- // all in the linear case just to keep the code complexity
- // down).
- float values[6] = {
- GrScalarToFloat(a * 4),
- 1.f / (GrScalarToFloat(a)),
- GrScalarToFloat(centerX1),
- GrScalarToFloat(radius0),
- GrScalarToFloat(SkScalarMul(radius0, radius0)),
- GrScalarToFloat(diffRadius)
- };
-
- uman.set1fv(fVSParamUni, 0, 6, values);
- uman.set1fv(fFSParamUni, 0, 6, values);
- fCachedCenter = centerX1;
- fCachedRadius = radius0;
- fCachedDiffRadius = diffRadius;
- }
-}
-
-
-/////////////////////////////////////////////////////////////////////
-
-GrConical2Gradient::GrConical2Gradient(GrTexture* texture,
- GrScalar center,
- GrScalar radius,
- GrScalar diffRadius)
- : INHERITED (texture)
- , fCenterX1 (center)
- , fRadius0 (radius)
- , fDiffRadius (diffRadius) {
-
-}
-
-GrConical2Gradient::GrConical2Gradient(GrContext* ctx,
- const SkShader& shader,
- GrSamplerState* sampler,
- SkScalar center,
- SkScalar startRadius,
- SkScalar diffRadius)
- : INHERITED(ctx, shader, sampler)
- , fCenterX1(center)
- , fRadius0(startRadius)
- , fDiffRadius(diffRadius) {
-}
-
-GrConical2Gradient::~GrConical2Gradient() {
-
-}
-
-
-const GrProgramStageFactory& GrConical2Gradient::getFactory() const {
- return GrTProgramStageFactory<GrConical2Gradient>::getInstance();
-}
-
-bool GrConical2Gradient::isEqual(const GrCustomStage& sBase) const {
- const GrConical2Gradient& s = static_cast<const GrConical2Gradient&>(sBase);
- return (INHERITED::isEqual(sBase) &&
- this->fCenterX1 == s.fCenterX1 &&
- this->fRadius0 == s.fRadius0 &&
- this->fDiffRadius == s.fDiffRadius);
-}
-
-/////////////////////////////////////////////////////////////////////
-
-
-class GrGLSweepGradient : public GrGLGradientStage {
-
-public:
-
- GrGLSweepGradient(const GrProgramStageFactory& factory,
- const GrCustomStage&) : INHERITED (factory) { }
- virtual ~GrGLSweepGradient() { }
-
- virtual void emitVS(GrGLShaderBuilder* builder,
- const char* vertexCoords) SK_OVERRIDE { }
- virtual void emitFS(GrGLShaderBuilder* builder,
- const char* outputColor,
- const char* inputColor,
- const char* samplerName) SK_OVERRIDE;
-
- static StageKey GenKey(const GrCustomStage& s) { return 0; }
-
-private:
-
- typedef GrGLGradientStage INHERITED;
-
-};
-
-void GrGLSweepGradient::emitFS(GrGLShaderBuilder* builder,
- const char* outputColor,
- const char* inputColor,
- const char* samplerName) {
- SkString t;
- t.printf("atan(- %s.y, - %s.x) * 0.1591549430918 + 0.5",
- builder->fSampleCoords.c_str(), builder->fSampleCoords.c_str());
- this->emitColorLookup(builder, t.c_str(), outputColor, samplerName);
-}
-
-/////////////////////////////////////////////////////////////////////
-
-GrSweepGradient::GrSweepGradient(GrTexture* texture)
- : INHERITED(texture) {
-
-}
-
-GrSweepGradient::GrSweepGradient(GrContext* ctx, const SkShader& shader,
- GrSamplerState* sampler)
- : INHERITED(ctx, shader, sampler) {
-}
-
-GrSweepGradient::~GrSweepGradient() {
-
-}
-
-const GrProgramStageFactory& GrSweepGradient::getFactory() const {
- return GrTProgramStageFactory<GrSweepGradient>::getInstance();
-}
-
+++ /dev/null
-/*
- * Copyright 2012 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef GrGradientEffects_DEFINED
-#define GrGradientEffects_DEFINED
-
-#include "GrSingleTextureEffect.h"
-#include "GrTypes.h"
-#include "GrScalar.h"
-
-class GrSamplerState;
-class SkShader;
-
-/*
- * The intepretation of the texture matrix depends on the sample mode. The
- * texture matrix is applied both when the texture coordinates are explicit
- * and when vertex positions are used as texture coordinates. In the latter
- * case the texture matrix is applied to the pre-view-matrix position
- * values.
- *
- * Normal SampleMode
- * The post-matrix texture coordinates are in normalize space with (0,0) at
- * the top-left and (1,1) at the bottom right.
- * RadialGradient
- * The matrix specifies the radial gradient parameters.
- * (0,0) in the post-matrix space is center of the radial gradient.
- * Radial2Gradient
- * Matrix transforms to space where first circle is centered at the
- * origin. The second circle will be centered (x, 0) where x may be
- * 0 and is provided by setRadial2Params. The post-matrix space is
- * normalized such that 1 is the second radius - first radius.
- * SweepGradient
- * The angle from the origin of texture coordinates in post-matrix space
- * determines the gradient value.
- */
-
-// Base class for Gr gradient effects
-class GrGradientEffect : public GrCustomStage {
-public:
-
- GrGradientEffect(GrTexture* texture);
- GrGradientEffect(GrContext* ctx, const SkShader& shader,
- GrSamplerState* sampler);
-
- virtual ~GrGradientEffect();
-
- unsigned int numTextures() const;
- GrTexture* texture(unsigned int index) const;
-
- bool useTexture() const { return fUseTexture; }
-
-private:
-
- GrTexture* fTexture;
- bool fUseTexture;
-
- typedef GrCustomStage INHERITED;
-
-};
-
-class GrGLLinearGradient;
-
-class GrLinearGradient : public GrGradientEffect {
-
-public:
-
- GrLinearGradient(GrTexture* texture);
- GrLinearGradient(GrContext* ctx, const SkShader& shader,
- GrSamplerState* sampler);
- virtual ~GrLinearGradient();
-
- static const char* Name() { return "Linear Gradient"; }
- virtual const GrProgramStageFactory& getFactory() const SK_OVERRIDE;
-
- typedef GrGLLinearGradient GLProgramStage;
-
-private:
-
- typedef GrGradientEffect INHERITED;
-};
-
-class GrGLRadialGradient;
-
-class GrRadialGradient : public GrGradientEffect {
-
-public:
-
- GrRadialGradient(GrTexture* texture);
- GrRadialGradient(GrContext* ctx, const SkShader& shader,
- GrSamplerState* sampler);
- virtual ~GrRadialGradient();
-
- static const char* Name() { return "Radial Gradient"; }
- virtual const GrProgramStageFactory& getFactory() const SK_OVERRIDE;
-
- typedef GrGLRadialGradient GLProgramStage;
-
-private:
-
- typedef GrGradientEffect INHERITED;
-};
-
-class GrGLRadial2Gradient;
-
-class GrRadial2Gradient : public GrGradientEffect {
-
-public:
-
- GrRadial2Gradient(GrTexture* texture, GrScalar center, GrScalar radius, bool posRoot);
- GrRadial2Gradient(GrContext* ctx, const SkShader& shader,
- GrSamplerState* sampler, SkScalar center,
- SkScalar radius, SkScalar diffRadius);
- virtual ~GrRadial2Gradient();
-
- static const char* Name() { return "Two-Point Radial Gradient"; }
- virtual const GrProgramStageFactory& getFactory() const SK_OVERRIDE;
- virtual bool isEqual(const GrCustomStage&) const SK_OVERRIDE;
-
- // The radial gradient parameters can collapse to a linear (instead of quadratic) equation.
- bool isDegenerate() const { return GR_Scalar1 == fCenterX1; }
- GrScalar center() const { return fCenterX1; }
- GrScalar radius() const { return fRadius0; }
- bool isPosRoot() const { return SkToBool(fPosRoot); }
-
- typedef GrGLRadial2Gradient GLProgramStage;
-
-private:
-
- // @{
- // Cache of values - these can change arbitrarily, EXCEPT
- // we shouldn't change between degenerate and non-degenerate?!
-
- GrScalar fCenterX1;
- GrScalar fRadius0;
- SkBool8 fPosRoot;
-
- // @}
-
- typedef GrGradientEffect INHERITED;
-};
-
-class GrGLConical2Gradient;
-
-class GrConical2Gradient : public GrGradientEffect {
-
-public:
-
- GrConical2Gradient(GrTexture* texture, GrScalar center, GrScalar radius, GrScalar diffRadius);
- GrConical2Gradient(GrContext* ctx, const SkShader& shader,
- GrSamplerState* sampler, SkScalar center,
- SkScalar radius, SkScalar diffRadius);
- virtual ~GrConical2Gradient();
-
- static const char* Name() { return "Two-Point Conical Gradient"; }
- virtual const GrProgramStageFactory& getFactory() const SK_OVERRIDE;
- virtual bool isEqual(const GrCustomStage&) const SK_OVERRIDE;
-
- // The radial gradient parameters can collapse to a linear (instead of quadratic) equation.
- bool isDegenerate() const { return SkScalarAbs(fDiffRadius) == SkScalarAbs(fCenterX1); }
- GrScalar center() const { return fCenterX1; }
- GrScalar diffRadius() const { return fDiffRadius; }
- GrScalar radius() const { return fRadius0; }
-
- typedef GrGLConical2Gradient GLProgramStage;
-
-private:
-
- // @{
- // Cache of values - these can change arbitrarily, EXCEPT
- // we shouldn't change between degenerate and non-degenerate?!
-
- GrScalar fCenterX1;
- GrScalar fRadius0;
- GrScalar fDiffRadius;
-
- // @}
-
- typedef GrGradientEffect INHERITED;
-};
-
-class GrGLSweepGradient;
-
-class GrSweepGradient : public GrGradientEffect {
-
-public:
-
- GrSweepGradient(GrTexture* texture);
- GrSweepGradient(GrContext* ctx, const SkShader& shader,
- GrSamplerState* sampler);
- virtual ~GrSweepGradient();
-
- static const char* Name() { return "Sweep Gradient"; }
- virtual const GrProgramStageFactory& getFactory() const SK_OVERRIDE;
-
- typedef GrGLSweepGradient GLProgramStage;
-
-protected:
-
- typedef GrGradientEffect INHERITED;
-};
-
-#endif
-
#include "effects/GrColorTableEffect.h"
#include "effects/GrConvolutionEffect.h"
-#include "effects/GrGradientEffects.h"
+#include "../effects/gradients/SkLinearGradient.h"
+#include "../effects/gradients/SkRadialGradient.h"
+#include "../effects/gradients/SkTwoPointRadialGradient.h"
+#include "../effects/gradients/SkTwoPointConicalGradient.h"
+#include "../effects/gradients/SkSweepGradient.h"
#include "effects/GrMorphologyEffect.h"
#include "SkLightingImageFilter.h"
#include "GrProgramStageFactory.h"
projects / platform / upstream / libSkiaSharp.git / commitdiff