1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/gpu/effects/GrTextureDomain.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,280 @@
1.4 +/*
1.5 + * Copyright 2012 Google Inc.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +#include "GrTextureDomain.h"
1.12 +#include "GrSimpleTextureEffect.h"
1.13 +#include "GrTBackendEffectFactory.h"
1.14 +#include "gl/GrGLEffect.h"
1.15 +#include "SkFloatingPoint.h"
1.16 +
1.17 +
1.18 +GrTextureDomain::GrTextureDomain(const SkRect& domain, Mode mode, int index)
1.19 + : fIndex(index) {
1.20 +
1.21 + static const SkRect kFullRect = {0, 0, SK_Scalar1, SK_Scalar1};
1.22 + if (domain.contains(kFullRect)) {
1.23 + fMode = kIgnore_Mode;
1.24 + } else {
1.25 + fMode = mode;
1.26 + }
1.27 +
1.28 + if (fMode != kIgnore_Mode) {
1.29 + // We don't currently handle domains that are empty or don't intersect the texture.
1.30 + // It is OK if the domain rect is a line or point, but it should not be inverted. We do not
1.31 + // handle rects that do not intersect the [0..1]x[0..1] rect.
1.32 + SkASSERT(domain.fLeft <= domain.fRight);
1.33 + SkASSERT(domain.fTop <= domain.fBottom);
1.34 + fDomain.fLeft = SkMaxScalar(domain.fLeft, kFullRect.fLeft);
1.35 + fDomain.fRight = SkMinScalar(domain.fRight, kFullRect.fRight);
1.36 + fDomain.fTop = SkMaxScalar(domain.fTop, kFullRect.fTop);
1.37 + fDomain.fBottom = SkMinScalar(domain.fBottom, kFullRect.fBottom);
1.38 + SkASSERT(fDomain.fLeft <= fDomain.fRight);
1.39 + SkASSERT(fDomain.fTop <= fDomain.fBottom);
1.40 + }
1.41 +}
1.42 +
1.43 +//////////////////////////////////////////////////////////////////////////////
1.44 +
1.45 +void GrTextureDomain::GLDomain::sampleTexture(GrGLShaderBuilder* builder,
1.46 + const GrTextureDomain& textureDomain,
1.47 + const char* outColor,
1.48 + const SkString& inCoords,
1.49 + const GrGLEffect::TextureSampler sampler,
1.50 + const char* inModulateColor) {
1.51 + SkASSERT((Mode)-1 == fMode || textureDomain.mode() == fMode);
1.52 + SkDEBUGCODE(fMode = textureDomain.mode();)
1.53 +
1.54 + if (kIgnore_Mode == textureDomain.mode()) {
1.55 + builder->fsCodeAppendf("\t%s = ", outColor);
1.56 + builder->fsAppendTextureLookupAndModulate(inModulateColor, sampler,
1.57 + inCoords.c_str());
1.58 + builder->fsCodeAppend(";\n");
1.59 + return;
1.60 + }
1.61 +
1.62 + if (!fDomainUni.isValid()) {
1.63 + const char* name;
1.64 + SkString uniName("TexDom");
1.65 + if (textureDomain.fIndex >= 0) {
1.66 + uniName.appendS32(textureDomain.fIndex);
1.67 + }
1.68 + fDomainUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
1.69 + kVec4f_GrSLType, uniName.c_str(), &name);
1.70 + fDomainName = name;
1.71 + }
1.72 + if (kClamp_Mode == textureDomain.mode()) {
1.73 + SkString clampedCoords;
1.74 + clampedCoords.appendf("\tclamp(%s, %s.xy, %s.zw)",
1.75 + inCoords.c_str(), fDomainName.c_str(), fDomainName.c_str());
1.76 +
1.77 + builder->fsCodeAppendf("\t%s = ", outColor);
1.78 + builder->fsAppendTextureLookupAndModulate(inModulateColor, sampler, clampedCoords.c_str());
1.79 + builder->fsCodeAppend(";\n");
1.80 + } else {
1.81 + SkASSERT(GrTextureDomain::kDecal_Mode == textureDomain.mode());
1.82 + // Add a block since we're going to declare variables.
1.83 + GrGLShaderBuilder::FSBlock block(builder);
1.84 +
1.85 + const char* domain = fDomainName.c_str();
1.86 + if (kImagination_GrGLVendor == builder->ctxInfo().vendor()) {
1.87 + // On the NexusS and GalaxyNexus, the other path (with the 'any'
1.88 + // call) causes the compilation error "Calls to any function that
1.89 + // may require a gradient calculation inside a conditional block
1.90 + // may return undefined results". This appears to be an issue with
1.91 + // the 'any' call since even the simple "result=black; if (any())
1.92 + // result=white;" code fails to compile.
1.93 + builder->fsCodeAppend("\tvec4 outside = vec4(0.0, 0.0, 0.0, 0.0);\n");
1.94 + builder->fsCodeAppend("\tvec4 inside = ");
1.95 + builder->fsAppendTextureLookupAndModulate(inModulateColor, sampler, inCoords.c_str());
1.96 + builder->fsCodeAppend(";\n");
1.97 +
1.98 + builder->fsCodeAppendf("\tfloat x = abs(2.0*(%s.x - %s.x)/(%s.z - %s.x) - 1.0);\n",
1.99 + inCoords.c_str(), domain, domain, domain);
1.100 + builder->fsCodeAppendf("\tfloat y = abs(2.0*(%s.y - %s.y)/(%s.w - %s.y) - 1.0);\n",
1.101 + inCoords.c_str(), domain, domain, domain);
1.102 + builder->fsCodeAppend("\tfloat blend = step(1.0, max(x, y));\n");
1.103 + builder->fsCodeAppendf("\t%s = mix(inside, outside, blend);\n", outColor);
1.104 + } else {
1.105 + builder->fsCodeAppend("\tbvec4 outside;\n");
1.106 + builder->fsCodeAppendf("\toutside.xy = lessThan(%s, %s.xy);\n", inCoords.c_str(),
1.107 + domain);
1.108 + builder->fsCodeAppendf("\toutside.zw = greaterThan(%s, %s.zw);\n", inCoords.c_str(),
1.109 + domain);
1.110 + builder->fsCodeAppendf("\t%s = any(outside) ? vec4(0.0, 0.0, 0.0, 0.0) : ", outColor);
1.111 + builder->fsAppendTextureLookupAndModulate(inModulateColor, sampler, inCoords.c_str());
1.112 + builder->fsCodeAppend(";\n");
1.113 + }
1.114 + }
1.115 +}
1.116 +
1.117 +void GrTextureDomain::GLDomain::setData(const GrGLUniformManager& uman,
1.118 + const GrTextureDomain& textureDomain,
1.119 + GrSurfaceOrigin textureOrigin) {
1.120 + SkASSERT(textureDomain.mode() == fMode);
1.121 + if (kIgnore_Mode != textureDomain.mode()) {
1.122 + GrGLfloat values[4] = {
1.123 + SkScalarToFloat(textureDomain.domain().left()),
1.124 + SkScalarToFloat(textureDomain.domain().top()),
1.125 + SkScalarToFloat(textureDomain.domain().right()),
1.126 + SkScalarToFloat(textureDomain.domain().bottom())
1.127 + };
1.128 + // vertical flip if necessary
1.129 + if (kBottomLeft_GrSurfaceOrigin == textureOrigin) {
1.130 + values[1] = 1.0f - values[1];
1.131 + values[3] = 1.0f - values[3];
1.132 + // The top and bottom were just flipped, so correct the ordering
1.133 + // of elements so that values = (l, t, r, b).
1.134 + SkTSwap(values[1], values[3]);
1.135 + }
1.136 + if (0 != memcmp(values, fPrevDomain, 4 * sizeof(GrGLfloat))) {
1.137 + uman.set4fv(fDomainUni, 1, values);
1.138 + memcpy(fPrevDomain, values, 4 * sizeof(GrGLfloat));
1.139 + }
1.140 + }
1.141 +}
1.142 +
1.143 +
1.144 +//////////////////////////////////////////////////////////////////////////////
1.145 +
1.146 +class GrGLTextureDomainEffect : public GrGLEffect {
1.147 +public:
1.148 + GrGLTextureDomainEffect(const GrBackendEffectFactory&, const GrDrawEffect&);
1.149 +
1.150 + virtual void emitCode(GrGLShaderBuilder*,
1.151 + const GrDrawEffect&,
1.152 + EffectKey,
1.153 + const char* outputColor,
1.154 + const char* inputColor,
1.155 + const TransformedCoordsArray&,
1.156 + const TextureSamplerArray&) SK_OVERRIDE;
1.157 +
1.158 + virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE;
1.159 +
1.160 + static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&);
1.161 +
1.162 +private:
1.163 + GrTextureDomain::GLDomain fGLDomain;
1.164 + typedef GrGLEffect INHERITED;
1.165 +};
1.166 +
1.167 +GrGLTextureDomainEffect::GrGLTextureDomainEffect(const GrBackendEffectFactory& factory,
1.168 + const GrDrawEffect&)
1.169 + : INHERITED(factory) {
1.170 +}
1.171 +
1.172 +void GrGLTextureDomainEffect::emitCode(GrGLShaderBuilder* builder,
1.173 + const GrDrawEffect& drawEffect,
1.174 + EffectKey key,
1.175 + const char* outputColor,
1.176 + const char* inputColor,
1.177 + const TransformedCoordsArray& coords,
1.178 + const TextureSamplerArray& samplers) {
1.179 + const GrTextureDomainEffect& effect = drawEffect.castEffect<GrTextureDomainEffect>();
1.180 + const GrTextureDomain& domain = effect.textureDomain();
1.181 +
1.182 + SkString coords2D = builder->ensureFSCoords2D(coords, 0);
1.183 + fGLDomain.sampleTexture(builder, domain, outputColor, coords2D, samplers[0], inputColor);
1.184 +}
1.185 +
1.186 +void GrGLTextureDomainEffect::setData(const GrGLUniformManager& uman,
1.187 + const GrDrawEffect& drawEffect) {
1.188 + const GrTextureDomainEffect& effect = drawEffect.castEffect<GrTextureDomainEffect>();
1.189 + const GrTextureDomain& domain = effect.textureDomain();
1.190 + fGLDomain.setData(uman, domain, effect.texture(0)->origin());
1.191 +}
1.192 +
1.193 +GrGLEffect::EffectKey GrGLTextureDomainEffect::GenKey(const GrDrawEffect& drawEffect,
1.194 + const GrGLCaps&) {
1.195 + const GrTextureDomain& domain = drawEffect.castEffect<GrTextureDomainEffect>().textureDomain();
1.196 + return GrTextureDomain::GLDomain::DomainKey(domain);
1.197 +}
1.198 +
1.199 +
1.200 +///////////////////////////////////////////////////////////////////////////////
1.201 +
1.202 +GrEffectRef* GrTextureDomainEffect::Create(GrTexture* texture,
1.203 + const SkMatrix& matrix,
1.204 + const SkRect& domain,
1.205 + GrTextureDomain::Mode mode,
1.206 + GrTextureParams::FilterMode filterMode,
1.207 + GrCoordSet coordSet) {
1.208 + static const SkRect kFullRect = {0, 0, SK_Scalar1, SK_Scalar1};
1.209 + if (GrTextureDomain::kIgnore_Mode == mode ||
1.210 + (GrTextureDomain::kClamp_Mode == mode && domain.contains(kFullRect))) {
1.211 + return GrSimpleTextureEffect::Create(texture, matrix, filterMode);
1.212 + } else {
1.213 +
1.214 + AutoEffectUnref effect(SkNEW_ARGS(GrTextureDomainEffect, (texture,
1.215 + matrix,
1.216 + domain,
1.217 + mode,
1.218 + filterMode,
1.219 + coordSet)));
1.220 + return CreateEffectRef(effect);
1.221 +
1.222 + }
1.223 +}
1.224 +
1.225 +GrTextureDomainEffect::GrTextureDomainEffect(GrTexture* texture,
1.226 + const SkMatrix& matrix,
1.227 + const SkRect& domain,
1.228 + GrTextureDomain::Mode mode,
1.229 + GrTextureParams::FilterMode filterMode,
1.230 + GrCoordSet coordSet)
1.231 + : GrSingleTextureEffect(texture, matrix, filterMode, coordSet)
1.232 + , fTextureDomain(domain, mode) {
1.233 +}
1.234 +
1.235 +GrTextureDomainEffect::~GrTextureDomainEffect() {
1.236 +
1.237 +}
1.238 +
1.239 +const GrBackendEffectFactory& GrTextureDomainEffect::getFactory() const {
1.240 + return GrTBackendEffectFactory<GrTextureDomainEffect>::getInstance();
1.241 +}
1.242 +
1.243 +bool GrTextureDomainEffect::onIsEqual(const GrEffect& sBase) const {
1.244 + const GrTextureDomainEffect& s = CastEffect<GrTextureDomainEffect>(sBase);
1.245 + return this->hasSameTextureParamsMatrixAndSourceCoords(s) &&
1.246 + this->fTextureDomain == s.fTextureDomain;
1.247 +}
1.248 +
1.249 +void GrTextureDomainEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
1.250 + if (GrTextureDomain::kDecal_Mode == fTextureDomain.mode()) { // TODO: helper
1.251 + *validFlags = 0;
1.252 + } else {
1.253 + this->updateConstantColorComponentsForModulation(color, validFlags);
1.254 + }
1.255 +}
1.256 +
1.257 +///////////////////////////////////////////////////////////////////////////////
1.258 +
1.259 +GR_DEFINE_EFFECT_TEST(GrTextureDomainEffect);
1.260 +
1.261 +GrEffectRef* GrTextureDomainEffect::TestCreate(SkRandom* random,
1.262 + GrContext*,
1.263 + const GrDrawTargetCaps&,
1.264 + GrTexture* textures[]) {
1.265 + int texIdx = random->nextBool() ? GrEffectUnitTest::kSkiaPMTextureIdx :
1.266 + GrEffectUnitTest::kAlphaTextureIdx;
1.267 + SkRect domain;
1.268 + domain.fLeft = random->nextUScalar1();
1.269 + domain.fRight = random->nextRangeScalar(domain.fLeft, SK_Scalar1);
1.270 + domain.fTop = random->nextUScalar1();
1.271 + domain.fBottom = random->nextRangeScalar(domain.fTop, SK_Scalar1);
1.272 + GrTextureDomain::Mode mode =
1.273 + (GrTextureDomain::Mode) random->nextULessThan(GrTextureDomain::kModeCount);
1.274 + const SkMatrix& matrix = GrEffectUnitTest::TestMatrix(random);
1.275 + bool bilerp = random->nextBool();
1.276 + GrCoordSet coords = random->nextBool() ? kLocal_GrCoordSet : kPosition_GrCoordSet;
1.277 + return GrTextureDomainEffect::Create(textures[texIdx],
1.278 + matrix,
1.279 + domain,
1.280 + mode,
1.281 + bilerp ? GrTextureParams::kBilerp_FilterMode : GrTextureParams::kNone_FilterMode,
1.282 + coords);
1.283 +}
