#include "SkTwoPointConicalGradient.h"
+#include "SkTwoPointConicalGradient_gpu.h"
+
+struct TwoPtRadialContext {
+ const TwoPtRadial& fRec;
+ float fRelX, fRelY;
+ const float fIncX, fIncY;
+ float fB;
+ const float fDB;
+
+ TwoPtRadialContext(const TwoPtRadial& rec, SkScalar fx, SkScalar fy,
+ SkScalar dfx, SkScalar dfy);
+ SkFixed nextT();
+};
+
static int valid_divide(float numer, float denom, float* ratio) {
SkASSERT(ratio);
if (0 == denom) {
// Return the number of distinct real roots, and write them into roots[] in
// ascending order
-static int find_quad_roots(float A, float B, float C, float roots[2]) {
+static int find_quad_roots(float A, float B, float C, float roots[2], bool descendingOrder = false) {
SkASSERT(roots);
if (A == 0) {
float r1 = C / Q;
roots[0] = r0 < r1 ? r0 : r1;
roots[1] = r0 > r1 ? r0 : r1;
+ if (descendingOrder) {
+ SkTSwap(roots[0], roots[1]);
+ }
return 2;
}
static float sqr(float x) { return x * x; }
void TwoPtRadial::init(const SkPoint& center0, SkScalar rad0,
- const SkPoint& center1, SkScalar rad1) {
+ const SkPoint& center1, SkScalar rad1,
+ bool flipped) {
fCenterX = SkScalarToFloat(center0.fX);
fCenterY = SkScalarToFloat(center0.fY);
fDCenterX = SkScalarToFloat(center1.fX) - fCenterX;
fA = sqr(fDCenterX) + sqr(fDCenterY) - sqr(fDRadius);
fRadius2 = sqr(fRadius);
fRDR = fRadius * fDRadius;
-}
-void TwoPtRadial::setup(SkScalar fx, SkScalar fy, SkScalar dfx, SkScalar dfy) {
- fRelX = SkScalarToFloat(fx) - fCenterX;
- fRelY = SkScalarToFloat(fy) - fCenterY;
- fIncX = SkScalarToFloat(dfx);
- fIncY = SkScalarToFloat(dfy);
- fB = -2 * (fDCenterX * fRelX + fDCenterY * fRelY + fRDR);
- fDB = -2 * (fDCenterX * fIncX + fDCenterY * fIncY);
+ fFlipped = flipped;
}
-SkFixed TwoPtRadial::nextT() {
+TwoPtRadialContext::TwoPtRadialContext(const TwoPtRadial& rec, SkScalar fx, SkScalar fy,
+ SkScalar dfx, SkScalar dfy)
+ : fRec(rec)
+ , fRelX(SkScalarToFloat(fx) - rec.fCenterX)
+ , fRelY(SkScalarToFloat(fy) - rec.fCenterY)
+ , fIncX(SkScalarToFloat(dfx))
+ , fIncY(SkScalarToFloat(dfy))
+ , fB(-2 * (rec.fDCenterX * fRelX + rec.fDCenterY * fRelY + rec.fRDR))
+ , fDB(-2 * (rec.fDCenterX * fIncX + rec.fDCenterY * fIncY)) {}
+
+SkFixed TwoPtRadialContext::nextT() {
float roots[2];
- float C = sqr(fRelX) + sqr(fRelY) - fRadius2;
- int countRoots = find_quad_roots(fA, fB, C, roots);
+ float C = sqr(fRelX) + sqr(fRelY) - fRec.fRadius2;
+ int countRoots = find_quad_roots(fRec.fA, fB, C, roots, fRec.fFlipped);
fRelX += fIncX;
fRelY += fIncY;
fB += fDB;
if (0 == countRoots) {
- return kDontDrawT;
+ return TwoPtRadial::kDontDrawT;
}
// Prefer the bigger t value if both give a radius(t) > 0
// find_quad_roots returns the values sorted, so we start with the last
float t = roots[countRoots - 1];
- float r = lerp(fRadius, fDRadius, t);
+ float r = lerp(fRec.fRadius, fRec.fDRadius, t);
if (r <= 0) {
t = roots[0]; // might be the same as roots[countRoots-1]
- r = lerp(fRadius, fDRadius, t);
+ r = lerp(fRec.fRadius, fRec.fDRadius, t);
if (r <= 0) {
- return kDontDrawT;
+ return TwoPtRadial::kDontDrawT;
}
}
return SkFloatToFixed(t);
}
-typedef void (*TwoPointConicalProc)(TwoPtRadial* rec, SkPMColor* dstC,
+typedef void (*TwoPointConicalProc)(TwoPtRadialContext* rec, SkPMColor* dstC,
const SkPMColor* cache, int toggle, int count);
-static void twopoint_clamp(TwoPtRadial* rec, SkPMColor* SK_RESTRICT dstC,
+static void twopoint_clamp(TwoPtRadialContext* rec, SkPMColor* SK_RESTRICT dstC,
const SkPMColor* SK_RESTRICT cache, int toggle,
int count) {
for (; count > 0; --count) {
}
}
-static void twopoint_repeat(TwoPtRadial* rec, SkPMColor* SK_RESTRICT dstC,
+static void twopoint_repeat(TwoPtRadialContext* rec, SkPMColor* SK_RESTRICT dstC,
const SkPMColor* SK_RESTRICT cache, int toggle,
int count) {
for (; count > 0; --count) {
}
}
-static void twopoint_mirror(TwoPtRadial* rec, SkPMColor* SK_RESTRICT dstC,
+static void twopoint_mirror(TwoPtRadialContext* rec, SkPMColor* SK_RESTRICT dstC,
const SkPMColor* SK_RESTRICT cache, int toggle,
int count) {
for (; count > 0; --count) {
}
void SkTwoPointConicalGradient::init() {
- fRec.init(fCenter1, fRadius1, fCenter2, fRadius2);
+ fRec.init(fCenter1, fRadius1, fCenter2, fRadius2, fFlippedGrad);
fPtsToUnit.reset();
}
SkTwoPointConicalGradient::SkTwoPointConicalGradient(
const SkPoint& start, SkScalar startRadius,
const SkPoint& end, SkScalar endRadius,
- const Descriptor& desc)
- : SkGradientShaderBase(desc),
+ bool flippedGrad, const Descriptor& desc,
+ const SkMatrix* localMatrix)
+ : SkGradientShaderBase(desc, localMatrix),
fCenter1(start),
fCenter2(end),
fRadius1(startRadius),
- fRadius2(endRadius) {
+ fRadius2(endRadius),
+ fFlippedGrad(flippedGrad) {
// this is degenerate, and should be caught by our caller
SkASSERT(fCenter1 != fCenter2 || fRadius1 != fRadius2);
this->init();
return false;
}
-void SkTwoPointConicalGradient::shadeSpan(int x, int y, SkPMColor* dstCParam,
- int count) {
+size_t SkTwoPointConicalGradient::contextSize() const {
+ return sizeof(TwoPointConicalGradientContext);
+}
+
+SkShader::Context* SkTwoPointConicalGradient::onCreateContext(const ContextRec& rec,
+ void* storage) const {
+ return SkNEW_PLACEMENT_ARGS(storage, TwoPointConicalGradientContext, (*this, rec));
+}
+
+SkTwoPointConicalGradient::TwoPointConicalGradientContext::TwoPointConicalGradientContext(
+ const SkTwoPointConicalGradient& shader, const ContextRec& rec)
+ : INHERITED(shader, rec)
+{
+ // we don't have a span16 proc
+ fFlags &= ~kHasSpan16_Flag;
+
+ // in general, we might discard based on computed-radius, so clear
+ // this flag (todo: sometimes we can detect that we never discard...)
+ fFlags &= ~kOpaqueAlpha_Flag;
+}
+
+void SkTwoPointConicalGradient::TwoPointConicalGradientContext::shadeSpan(
+ int x, int y, SkPMColor* dstCParam, int count) {
+ const SkTwoPointConicalGradient& twoPointConicalGradient =
+ static_cast<const SkTwoPointConicalGradient&>(fShader);
+
int toggle = init_dither_toggle(x, y);
SkASSERT(count > 0);
SkMatrix::MapXYProc dstProc = fDstToIndexProc;
- const SkPMColor* SK_RESTRICT cache = this->getCache32();
+ const SkPMColor* SK_RESTRICT cache = fCache->getCache32();
TwoPointConicalProc shadeProc = twopoint_repeat;
- if (SkShader::kClamp_TileMode == fTileMode) {
+ if (SkShader::kClamp_TileMode == twoPointConicalGradient.fTileMode) {
shadeProc = twopoint_clamp;
- } else if (SkShader::kMirror_TileMode == fTileMode) {
+ } else if (SkShader::kMirror_TileMode == twoPointConicalGradient.fTileMode) {
shadeProc = twopoint_mirror;
} else {
- SkASSERT(SkShader::kRepeat_TileMode == fTileMode);
+ SkASSERT(SkShader::kRepeat_TileMode == twoPointConicalGradient.fTileMode);
}
if (fDstToIndexClass != kPerspective_MatrixClass) {
dy = fDstToIndex.getSkewY();
}
- fRec.setup(fx, fy, dx, dy);
- (*shadeProc)(&fRec, dstC, cache, toggle, count);
+ TwoPtRadialContext rec(twoPointConicalGradient.fRec, fx, fy, dx, dy);
+ (*shadeProc)(&rec, dstC, cache, toggle, count);
} else { // perspective case
SkScalar dstX = SkIntToScalar(x) + SK_ScalarHalf;
SkScalar dstY = SkIntToScalar(y) + SK_ScalarHalf;
for (; count > 0; --count) {
SkPoint srcPt;
dstProc(fDstToIndex, dstX, dstY, &srcPt);
- fRec.setup(srcPt.fX, srcPt.fY, 0, 0);
- (*shadeProc)(&fRec, dstC, cache, toggle, 1);
+ TwoPtRadialContext rec(twoPointConicalGradient.fRec, srcPt.fX, srcPt.fY, 0, 0);
+ (*shadeProc)(&rec, dstC, cache, toggle, 1);
dstX += SK_Scalar1;
toggle = next_dither_toggle(toggle);
}
}
-bool SkTwoPointConicalGradient::setContext(const SkBitmap& device,
- const SkPaint& paint,
- const SkMatrix& matrix) {
- if (!this->INHERITED::setContext(device, paint, matrix)) {
- return false;
- }
-
- // we don't have a span16 proc
- fFlags &= ~kHasSpan16_Flag;
-
- // in general, we might discard based on computed-radius, so clear
- // this flag (todo: sometimes we can detect that we never discard...)
- fFlags &= ~kOpaqueAlpha_Flag;
-
- return true;
-}
-
SkShader::BitmapType SkTwoPointConicalGradient::asABitmap(
SkBitmap* bitmap, SkMatrix* matrix, SkShader::TileMode* xy) const {
SkPoint diff = fCenter2 - fCenter1;
return kTwoPointConical_BitmapType;
}
+// Returns the original non-sorted version of the gradient
SkShader::GradientType SkTwoPointConicalGradient::asAGradient(
GradientInfo* info) const {
if (info) {
- commonAsAGradient(info);
+ commonAsAGradient(info, fFlippedGrad);
info->fPoint[0] = fCenter1;
info->fPoint[1] = fCenter2;
info->fRadius[0] = fRadius1;
info->fRadius[1] = fRadius2;
+ if (fFlippedGrad) {
+ SkTSwap(info->fPoint[0], info->fPoint[1]);
+ SkTSwap(info->fRadius[0], info->fRadius[1]);
+ }
}
return kConical_GradientType;
}
fCenter2(buffer.readPoint()),
fRadius1(buffer.readScalar()),
fRadius2(buffer.readScalar()) {
+ if (buffer.pictureVersion() >= 24 || 0 == buffer.pictureVersion()) {
+ fFlippedGrad = buffer.readBool();
+ } else {
+ // V23_COMPATIBILITY_CODE
+ // Sort gradient by radius size for old pictures
+ if (fRadius2 < fRadius1) {
+ SkTSwap(fCenter1, fCenter2);
+ SkTSwap(fRadius1, fRadius2);
+ this->flipGradientColors();
+ fFlippedGrad = true;
+ } else {
+ fFlippedGrad = false;
+ }
+ }
this->init();
};
buffer.writePoint(fCenter2);
buffer.writeScalar(fRadius1);
buffer.writeScalar(fRadius2);
+ buffer.writeBool(fFlippedGrad);
}
-/////////////////////////////////////////////////////////////////////
-
#if SK_SUPPORT_GPU
-#include "GrTBackendEffectFactory.h"
-
-// For brevity
-typedef GrGLUniformManager::UniformHandle UniformHandle;
-
-class GrGLConical2Gradient : public GrGLGradientEffect {
-public:
-
- GrGLConical2Gradient(const GrBackendEffectFactory& factory, const GrDrawEffect&);
- virtual ~GrGLConical2Gradient() { }
-
- virtual void emitCode(GrGLShaderBuilder*,
- const GrDrawEffect&,
- EffectKey,
- const char* outputColor,
- const char* inputColor,
- const TransformedCoordsArray&,
- const TextureSamplerArray&) SK_OVERRIDE;
- virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE;
-
- static EffectKey GenKey(const GrDrawEffect&, const GrGLCaps& caps);
-
-protected:
-
- UniformHandle fParamUni;
-
- const char* fVSVaryingName;
- const char* fFSVaryingName;
-
- bool fIsDegenerate;
-
- // @{
- /// Values last uploaded as uniforms
-
- SkScalar fCachedCenter;
- SkScalar fCachedRadius;
- SkScalar fCachedDiffRadius;
-
- // @}
-
-private:
-
- typedef GrGLGradientEffect INHERITED;
-
-};
-
-/////////////////////////////////////////////////////////////////////
-
-class GrConical2Gradient : public GrGradientEffect {
-public:
-
- static GrEffectRef* Create(GrContext* ctx,
- const SkTwoPointConicalGradient& shader,
- const SkMatrix& matrix,
- SkShader::TileMode tm) {
- AutoEffectUnref effect(SkNEW_ARGS(GrConical2Gradient, (ctx, shader, matrix, tm)));
- return CreateEffectRef(effect);
- }
-
- virtual ~GrConical2Gradient() { }
-
- static const char* Name() { return "Two-Point Conical Gradient"; }
- virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE {
- return GrTBackendEffectFactory<GrConical2Gradient>::getInstance();
- }
-
- // The radial gradient parameters can collapse to a linear (instead of quadratic) equation.
- bool isDegenerate() const { return SkScalarAbs(fDiffRadius) == SkScalarAbs(fCenterX1); }
- SkScalar center() const { return fCenterX1; }
- SkScalar diffRadius() const { return fDiffRadius; }
- SkScalar radius() const { return fRadius0; }
-
- typedef GrGLConical2Gradient GLEffect;
-
-private:
- virtual bool onIsEqual(const GrEffect& sBase) const SK_OVERRIDE {
- const GrConical2Gradient& s = CastEffect<GrConical2Gradient>(sBase);
- return (INHERITED::onIsEqual(sBase) &&
- this->fCenterX1 == s.fCenterX1 &&
- this->fRadius0 == s.fRadius0 &&
- this->fDiffRadius == s.fDiffRadius);
- }
-
- GrConical2Gradient(GrContext* ctx,
- const SkTwoPointConicalGradient& shader,
- const SkMatrix& matrix,
- SkShader::TileMode tm)
- : INHERITED(ctx, shader, matrix, tm)
- , fCenterX1(shader.getCenterX1())
- , fRadius0(shader.getStartRadius())
- , fDiffRadius(shader.getDiffRadius()) {
- // We pass the linear part of the quadratic as a varying.
- // float b = -2.0 * (fCenterX1 * x + fRadius0 * fDiffRadius * z)
- fBTransform = this->getCoordTransform();
- SkMatrix& bMatrix = *fBTransform.accessMatrix();
- SkScalar r0dr = SkScalarMul(fRadius0, fDiffRadius);
- bMatrix[SkMatrix::kMScaleX] = -2 * (SkScalarMul(fCenterX1, bMatrix[SkMatrix::kMScaleX]) +
- SkScalarMul(r0dr, bMatrix[SkMatrix::kMPersp0]));
- bMatrix[SkMatrix::kMSkewX] = -2 * (SkScalarMul(fCenterX1, bMatrix[SkMatrix::kMSkewX]) +
- SkScalarMul(r0dr, bMatrix[SkMatrix::kMPersp1]));
- bMatrix[SkMatrix::kMTransX] = -2 * (SkScalarMul(fCenterX1, bMatrix[SkMatrix::kMTransX]) +
- SkScalarMul(r0dr, bMatrix[SkMatrix::kMPersp2]));
- this->addCoordTransform(&fBTransform);
- }
-
- GR_DECLARE_EFFECT_TEST;
-
- // @{
- // Cache of values - these can change arbitrarily, EXCEPT
- // we shouldn't change between degenerate and non-degenerate?!
-
- GrCoordTransform fBTransform;
- SkScalar fCenterX1;
- SkScalar fRadius0;
- SkScalar fDiffRadius;
-
- // @}
-
- typedef GrGradientEffect INHERITED;
-};
-
-GR_DEFINE_EFFECT_TEST(GrConical2Gradient);
-
-GrEffectRef* GrConical2Gradient::TestCreate(SkRandom* random,
- GrContext* context,
- const GrDrawTargetCaps&,
- GrTexture**) {
- SkPoint center1 = {random->nextUScalar1(), random->nextUScalar1()};
- SkScalar radius1 = random->nextUScalar1();
- SkPoint center2;
- SkScalar radius2;
- do {
- center2.set(random->nextUScalar1(), random->nextUScalar1());
- radius2 = random->nextUScalar1 ();
- // If the circles are identical the factory will give us an empty shader.
- } while (radius1 == radius2 && center1 == center2);
-
- SkColor colors[kMaxRandomGradientColors];
- SkScalar stopsArray[kMaxRandomGradientColors];
- SkScalar* stops = stopsArray;
- SkShader::TileMode tm;
- int colorCount = RandomGradientParams(random, colors, &stops, &tm);
- SkAutoTUnref<SkShader> shader(SkGradientShader::CreateTwoPointConical(center1, radius1,
- center2, radius2,
- colors, stops, colorCount,
- tm));
- SkPaint paint;
- return shader->asNewEffect(context, paint);
-}
-
-
-/////////////////////////////////////////////////////////////////////
-
-GrGLConical2Gradient::GrGLConical2Gradient(const GrBackendEffectFactory& factory,
- const GrDrawEffect& drawEffect)
- : INHERITED(factory)
- , fVSVaryingName(NULL)
- , fFSVaryingName(NULL)
- , fCachedCenter(SK_ScalarMax)
- , fCachedRadius(-SK_ScalarMax)
- , fCachedDiffRadius(-SK_ScalarMax) {
-
- const GrConical2Gradient& data = drawEffect.castEffect<GrConical2Gradient>();
- fIsDegenerate = data.isDegenerate();
-}
-
-void GrGLConical2Gradient::emitCode(GrGLShaderBuilder* builder,
- const GrDrawEffect&,
- EffectKey key,
- const char* outputColor,
- const char* inputColor,
- const TransformedCoordsArray& coords,
- const TextureSamplerArray& samplers) {
- this->emitUniforms(builder, key);
- fParamUni = builder->addUniformArray(GrGLShaderBuilder::kFragment_Visibility,
- kFloat_GrSLType, "Conical2FSParams", 6);
-
- 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(fParamUni).appendArrayAccess(0, &p0);
- builder->getUniformVariable(fParamUni).appendArrayAccess(1, &p1);
- builder->getUniformVariable(fParamUni).appendArrayAccess(2, &p2);
- builder->getUniformVariable(fParamUni).appendArrayAccess(3, &p3);
- builder->getUniformVariable(fParamUni).appendArrayAccess(4, &p4);
- builder->getUniformVariable(fParamUni).appendArrayAccess(5, &p5);
-
- // We interpolate the linear component in coords[1].
- SkASSERT(coords[0].type() == coords[1].type());
- const char* coords2D;
- SkString bVar;
- if (kVec3f_GrSLType == coords[0].type()) {
- builder->fsCodeAppendf("\tvec3 interpolants = vec3(%s.xy, %s.x) / %s.z;\n",
- coords[0].c_str(), coords[1].c_str(), coords[0].c_str());
- coords2D = "interpolants.xy";
- bVar = "interpolants.z";
- } else {
- coords2D = coords[0].c_str();
- bVar.printf("%s.x", coords[1].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)
- builder->fsCodeAppendf("\t%s = vec4(0.0,0.0,0.0,0.0);\n", outputColor);
-
- // c = (x^2)+(y^2) - params[4]
- builder->fsCodeAppendf("\tfloat %s = dot(%s, %s) - %s;\n",
- cName.c_str(), coords2D, coords2D, p4.c_str());
-
- // Non-degenerate case (quadratic)
- if (!fIsDegenerate) {
-
- // ac4 = params[0] * c
- builder->fsCodeAppendf("\tfloat %s = %s * %s;\n", ac4Name.c_str(), p0.c_str(),
- cName.c_str());
-
- // d = b^2 - ac4
- builder->fsCodeAppendf("\tfloat %s = %s * %s - %s;\n", dName.c_str(),
- bVar.c_str(), bVar.c_str(), ac4Name.c_str());
-
- // only proceed if discriminant is >= 0
- builder->fsCodeAppendf("\tif (%s >= 0.0) {\n", dName.c_str());
-
- // intermediate value we'll use to compute the roots
- // q = -0.5 * (b +/- sqrt(d))
- builder->fsCodeAppendf("\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]
- builder->fsCodeAppendf("\t\tfloat %s = %s * %s;\n", r0Name.c_str(),
- qName.c_str(), p1.c_str());
- // r1 = c / q
- builder->fsCodeAppendf("\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:
- builder->fsCodeAppendf("\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
- builder->fsCodeAppendf("\t\tif (%s * %s + %s > 0.0) {\n", tName.c_str(),
- p5.c_str(), p3.c_str());
-
- builder->fsCodeAppend("\t\t");
- this->emitColor(builder, tName.c_str(), key, outputColor, inputColor, samplers);
-
- // otherwise, if r(t) for the larger root was <= 0, try the other root
- builder->fsCodeAppend("\t\t} else {\n");
- builder->fsCodeAppendf("\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
- builder->fsCodeAppendf("\t\t\tif (%s * %s + %s > 0.0) {\n",
- tName.c_str(), p5.c_str(), p3.c_str());
-
- builder->fsCodeAppend("\t\t\t");
- this->emitColor(builder, tName.c_str(), key, outputColor, inputColor, samplers);
-
- // end if (r(t) > 0) for smaller root
- builder->fsCodeAppend("\t\t\t}\n");
- // end if (r(t) > 0), else, for larger root
- builder->fsCodeAppend("\t\t}\n");
- // end if (discriminant >= 0)
- builder->fsCodeAppend("\t}\n");
- } else {
-
- // linear case: t = -c/b
- builder->fsCodeAppendf("\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
- builder->fsCodeAppendf("\tif (%s * %s + %s > 0.0) {\n", tName.c_str(),
- p5.c_str(), p3.c_str());
- builder->fsCodeAppend("\t");
- this->emitColor(builder, tName.c_str(), key, outputColor, inputColor, samplers);
- builder->fsCodeAppend("\t}\n");
- }
-}
-
-void GrGLConical2Gradient::setData(const GrGLUniformManager& uman,
- const GrDrawEffect& drawEffect) {
- INHERITED::setData(uman, drawEffect);
- const GrConical2Gradient& data = drawEffect.castEffect<GrConical2Gradient>();
- SkASSERT(data.isDegenerate() == fIsDegenerate);
- SkScalar centerX1 = data.center();
- SkScalar radius0 = data.radius();
- SkScalar diffRadius = data.diffRadius();
-
- if (fCachedCenter != centerX1 ||
- fCachedRadius != radius0 ||
- fCachedDiffRadius != diffRadius) {
-
- SkScalar a = SkScalarMul(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] = {
- SkScalarToFloat(a * 4),
- 1.f / (SkScalarToFloat(a)),
- SkScalarToFloat(centerX1),
- SkScalarToFloat(radius0),
- SkScalarToFloat(SkScalarMul(radius0, radius0)),
- SkScalarToFloat(diffRadius)
- };
-
- uman.set1fv(fParamUni, 6, values);
- fCachedCenter = centerX1;
- fCachedRadius = radius0;
- fCachedDiffRadius = diffRadius;
- }
-}
-
-GrGLEffect::EffectKey GrGLConical2Gradient::GenKey(const GrDrawEffect& drawEffect,
- const GrGLCaps&) {
- enum {
- kIsDegenerate = 1 << kBaseKeyBitCnt,
- };
-
- EffectKey key = GenBaseGradientKey(drawEffect);
- if (drawEffect.castEffect<GrConical2Gradient>().isDegenerate()) {
- key |= kIsDegenerate;
- }
- return key;
-}
-
-/////////////////////////////////////////////////////////////////////
-
GrEffectRef* SkTwoPointConicalGradient::asNewEffect(GrContext* context, const SkPaint&) const {
SkASSERT(NULL != context);
SkASSERT(fPtsToUnit.isIdentity());
- // invert the localM, translate to center1, rotate so center2 is on x axis.
- SkMatrix matrix;
- if (!this->getLocalMatrix().invert(&matrix)) {
- return NULL;
- }
- matrix.postTranslate(-fCenter1.fX, -fCenter1.fY);
-
- SkPoint diff = fCenter2 - fCenter1;
- SkScalar diffLen = diff.length();
- if (0 != diffLen) {
- SkScalar invDiffLen = SkScalarInvert(diffLen);
- SkMatrix rot;
- rot.setSinCos(-SkScalarMul(invDiffLen, diff.fY),
- SkScalarMul(invDiffLen, diff.fX));
- matrix.postConcat(rot);
- }
- return GrConical2Gradient::Create(context, *this, matrix, fTileMode);
+ return Gr2PtConicalGradientEffect::Create(context, *this, fTileMode);
}
#else
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