The Tor Browser: gfx/skia/trunk/src/gpu/effects/GrBicubicEffect.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/gpu/effects/GrBicubicEffect.cpp@129ffea94266 (annotated)

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

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 #include "GrBicubicEffect.h"
 #define DS(x) SkDoubleToScalar(x)
 const SkScalar GrBicubicEffect::gMitchellCoefficients[16] = {
     DS( 1.0 / 18.0), DS(-9.0 / 18.0), DS( 15.0 / 18.0), DS( -7.0 / 18.0),
     DS(16.0 / 18.0), DS( 0.0 / 18.0), DS(-36.0 / 18.0), DS( 21.0 / 18.0),
     DS( 1.0 / 18.0), DS( 9.0 / 18.0), DS( 27.0 / 18.0), DS(-21.0 / 18.0),
     DS( 0.0 / 18.0), DS( 0.0 / 18.0), DS( -6.0 / 18.0), DS(  7.0 / 18.0),
 };
 class GrGLBicubicEffect : public GrGLEffect {
 public:
     GrGLBicubicEffect(const GrBackendEffectFactory& factory,
                       const GrDrawEffect&);
     virtual void emitCode(GrGLShaderBuilder*,
                           const GrDrawEffect&,
                           EffectKey,
                           const char* outputColor,
                           const char* inputColor,
                           const TransformedCoordsArray&,
                           const TextureSamplerArray&) SK_OVERRIDE;
     virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE;
     static inline EffectKey GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&) {
         const GrTextureDomain& domain = drawEffect.castEffect<GrBicubicEffect>().domain();
         return GrTextureDomain::GLDomain::DomainKey(domain);
     }
 private:
     typedef GrGLUniformManager::UniformHandle        UniformHandle;
     UniformHandle               fCoefficientsUni;
     UniformHandle               fImageIncrementUni;
     GrTextureDomain::GLDomain   fDomain;
     typedef GrGLEffect INHERITED;
 };
 GrGLBicubicEffect::GrGLBicubicEffect(const GrBackendEffectFactory& factory, const GrDrawEffect&)
     : INHERITED(factory) {
 }
 void GrGLBicubicEffect::emitCode(GrGLShaderBuilder* builder,
                                  const GrDrawEffect& drawEffect,
                                  EffectKey key,
                                  const char* outputColor,
                                  const char* inputColor,
                                  const TransformedCoordsArray& coords,
                                  const TextureSamplerArray& samplers) {
     const GrTextureDomain& domain = drawEffect.castEffect<GrBicubicEffect>().domain();
     SkString coords2D = builder->ensureFSCoords2D(coords, 0);
     fCoefficientsUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
                                            kMat44f_GrSLType, "Coefficients");
     fImageIncrementUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
                                              kVec2f_GrSLType, "ImageIncrement");
     const char* imgInc = builder->getUniformCStr(fImageIncrementUni);
     const char* coeff = builder->getUniformCStr(fCoefficientsUni);
     SkString cubicBlendName;
     static const GrGLShaderVar gCubicBlendArgs[] = {
         GrGLShaderVar("coefficients",  kMat44f_GrSLType),
         GrGLShaderVar("t",             kFloat_GrSLType),
         GrGLShaderVar("c0",            kVec4f_GrSLType),
         GrGLShaderVar("c1",            kVec4f_GrSLType),
         GrGLShaderVar("c2",            kVec4f_GrSLType),
         GrGLShaderVar("c3",            kVec4f_GrSLType),
     };
     builder->fsEmitFunction(kVec4f_GrSLType,
                             "cubicBlend",
                             SK_ARRAY_COUNT(gCubicBlendArgs),
                             gCubicBlendArgs,
                             "\tvec4 ts = vec4(1.0, t, t * t, t * t * t);\n"
                             "\tvec4 c = coefficients * ts;\n"
                             "\treturn c.x * c0 + c.y * c1 + c.z * c2 + c.w * c3;\n",
                             &cubicBlendName);
     builder->fsCodeAppendf("\tvec2 coord = %s - %s * vec2(0.5);\n", coords2D.c_str(), imgInc);
     // We unnormalize the coord in order to determine our fractional offset (f) within the texel
     // We then snap coord to a texel center and renormalize. The snap prevents cases where the
     // starting coords are near a texel boundary and accumulations of imgInc would cause us to skip/
     // double hit a texel.
     builder->fsCodeAppendf("\tcoord /= %s;\n", imgInc);
     builder->fsCodeAppend("\tvec2 f = fract(coord);\n");
     builder->fsCodeAppendf("\tcoord = (coord - f + vec2(0.5)) * %s;\n", imgInc);
     builder->fsCodeAppend("\tvec4 rowColors[4];\n");
     for (int y = 0; y < 4; ++y) {
         for (int x = 0; x < 4; ++x) {
             SkString coord;
             coord.printf("coord + %s * vec2(%d, %d)", imgInc, x - 1, y - 1);
             SkString sampleVar;
             sampleVar.printf("rowColors[%d]", x);
             fDomain.sampleTexture(builder, domain, sampleVar.c_str(), coord, samplers[0]);
         }
         builder->fsCodeAppendf("\tvec4 s%d = %s(%s, f.x, rowColors[0], rowColors[1], rowColors[2], rowColors[3]);\n", y, cubicBlendName.c_str(), coeff);
     }
     SkString bicubicColor;
     bicubicColor.printf("%s(%s, f.y, s0, s1, s2, s3)", cubicBlendName.c_str(), coeff);
     builder->fsCodeAppendf("\t%s = %s;\n", outputColor, (GrGLSLExpr4(bicubicColor.c_str()) * GrGLSLExpr4(inputColor)).c_str());
 }
 void GrGLBicubicEffect::setData(const GrGLUniformManager& uman,
                                 const GrDrawEffect& drawEffect) {
     const GrBicubicEffect& effect = drawEffect.castEffect<GrBicubicEffect>();
     const GrTexture& texture = *effect.texture(0);
     float imageIncrement[2];
     imageIncrement[0] = 1.0f / texture.width();
     imageIncrement[1] = 1.0f / texture.height();
     uman.set2fv(fImageIncrementUni, 1, imageIncrement);
     uman.setMatrix4f(fCoefficientsUni, effect.coefficients());
     fDomain.setData(uman, effect.domain(), texture.origin());
 }
 static inline void convert_row_major_scalar_coeffs_to_column_major_floats(float dst[16],
                                                                           const SkScalar src[16]) {
     for (int y = 0; y < 4; y++) {
         for (int x = 0; x < 4; x++) {
             dst[x * 4 + y] = SkScalarToFloat(src[y * 4 + x]);
         }
     }
 }
 GrBicubicEffect::GrBicubicEffect(GrTexture* texture,
                                  const SkScalar coefficients[16],
                                  const SkMatrix &matrix,
                                  const SkShader::TileMode tileModes[2])
   : INHERITED(texture, matrix, GrTextureParams(tileModes, GrTextureParams::kNone_FilterMode))
   , fDomain(GrTextureDomain::IgnoredDomain()) {
     convert_row_major_scalar_coeffs_to_column_major_floats(fCoefficients, coefficients);
 }
 GrBicubicEffect::GrBicubicEffect(GrTexture* texture,
                                  const SkScalar coefficients[16],
                                  const SkMatrix &matrix,
                                  const SkRect& domain)
   : INHERITED(texture, matrix, GrTextureParams(SkShader::kClamp_TileMode,
                                                GrTextureParams::kNone_FilterMode))
   , fDomain(domain, GrTextureDomain::kClamp_Mode) {
     convert_row_major_scalar_coeffs_to_column_major_floats(fCoefficients, coefficients);
 }
 GrBicubicEffect::~GrBicubicEffect() {
 }
 const GrBackendEffectFactory& GrBicubicEffect::getFactory() const {
     return GrTBackendEffectFactory<GrBicubicEffect>::getInstance();
 }
 bool GrBicubicEffect::onIsEqual(const GrEffect& sBase) const {
     const GrBicubicEffect& s = CastEffect<GrBicubicEffect>(sBase);
     return this->textureAccess(0) == s.textureAccess(0) &&
            !memcmp(fCoefficients, s.coefficients(), 16);
 }
 void GrBicubicEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
     // FIXME: Perhaps we can do better.
     *validFlags = 0;
     return;
 }
 GR_DEFINE_EFFECT_TEST(GrBicubicEffect);
 GrEffectRef* GrBicubicEffect::TestCreate(SkRandom* random,
                                          GrContext* context,
                                          const GrDrawTargetCaps&,
                                          GrTexture* textures[]) {
     int texIdx = random->nextBool() ? GrEffectUnitTest::kSkiaPMTextureIdx :
                                       GrEffectUnitTest::kAlphaTextureIdx;
     SkScalar coefficients[16];
     for (int i = 0; i < 16; i++) {
         coefficients[i] = random->nextSScalar1();
     }
     return GrBicubicEffect::Create(textures[texIdx], coefficients);
 }

The Tor Browser / annotate

gfx/skia/trunk/src/gpu/effects/GrBicubicEffect.cpp@129ffea94266 (annotated)

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