| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "GrBitmapTextGeoProc.h" |
| #include "GrFontAtlasSizes.h" |
| #include "GrInvariantOutput.h" |
| #include "GrTexture.h" |
| #include "gl/GrGLFragmentProcessor.h" |
| #include "gl/GrGLTexture.h" |
| #include "gl/GrGLGeometryProcessor.h" |
| #include "gl/builders/GrGLProgramBuilder.h" |
| |
| class GrGLBitmapTextGeoProc : public GrGLGeometryProcessor { |
| public: |
| GrGLBitmapTextGeoProc(const GrGeometryProcessor&, const GrBatchTracker&) |
| : fColor(GrColor_ILLEGAL) {} |
| |
| void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override{ |
| const GrBitmapTextGeoProc& cte = args.fGP.cast<GrBitmapTextGeoProc>(); |
| |
| GrGLGPBuilder* pb = args.fPB; |
| GrGLVertexBuilder* vsBuilder = pb->getVertexShaderBuilder(); |
| |
| // emit attributes |
| vsBuilder->emitAttributes(cte); |
| |
| // compute numbers to be hardcoded to convert texture coordinates from int to float |
| SkASSERT(cte.numTextures() == 1); |
| GrTexture* atlas = cte.textureAccess(0).getTexture(); |
| SkASSERT(atlas && SkIsPow2(atlas->width()) && SkIsPow2(atlas->height())); |
| SkScalar recipWidth = 1.0f / atlas->width(); |
| SkScalar recipHeight = 1.0f / atlas->height(); |
| |
| GrGLVertToFrag v(kVec2f_GrSLType); |
| pb->addVarying("TextureCoords", &v); |
| vsBuilder->codeAppendf("%s = vec2(%.*f, %.*f) * %s;", v.vsOut(), |
| GR_SIGNIFICANT_POW2_DECIMAL_DIG, recipWidth, |
| GR_SIGNIFICANT_POW2_DECIMAL_DIG, recipHeight, |
| cte.inTextureCoords()->fName); |
| |
| // Setup pass through color |
| if (!cte.colorIgnored()) { |
| if (cte.hasVertexColor()) { |
| pb->addPassThroughAttribute(cte.inColor(), args.fOutputColor); |
| } else { |
| this->setupUniformColor(pb, args.fOutputColor, &fColorUniform); |
| } |
| } |
| |
| // Setup position |
| this->setupPosition(pb, gpArgs, cte.inPosition()->fName); |
| |
| // emit transforms |
| this->emitTransforms(args.fPB, gpArgs->fPositionVar, cte.inPosition()->fName, |
| cte.localMatrix(), args.fTransformsIn, args.fTransformsOut); |
| |
| GrGLFragmentBuilder* fsBuilder = pb->getFragmentShaderBuilder(); |
| if (cte.maskFormat() == kARGB_GrMaskFormat) { |
| fsBuilder->codeAppendf("%s = ", args.fOutputColor); |
| fsBuilder->appendTextureLookupAndModulate(args.fOutputColor, |
| args.fSamplers[0], |
| v.fsIn(), |
| kVec2f_GrSLType); |
| fsBuilder->codeAppend(";"); |
| fsBuilder->codeAppendf("%s = vec4(1);", args.fOutputCoverage); |
| } else { |
| fsBuilder->codeAppendf("%s = ", args.fOutputCoverage); |
| fsBuilder->appendTextureLookup(args.fSamplers[0], v.fsIn(), kVec2f_GrSLType); |
| fsBuilder->codeAppend(";"); |
| } |
| } |
| |
| virtual void setData(const GrGLProgramDataManager& pdman, |
| const GrPrimitiveProcessor& gp, |
| const GrBatchTracker& bt) override { |
| const GrBitmapTextGeoProc& btgp = gp.cast<GrBitmapTextGeoProc>(); |
| if (btgp.color() != fColor && !btgp.hasVertexColor()) { |
| GrGLfloat c[4]; |
| GrColorToRGBAFloat(btgp.color(), c); |
| pdman.set4fv(fColorUniform, 1, c); |
| fColor = btgp.color(); |
| } |
| } |
| |
| void setTransformData(const GrPrimitiveProcessor& primProc, |
| const GrGLProgramDataManager& pdman, |
| int index, |
| const SkTArray<const GrCoordTransform*, true>& transforms) override { |
| this->setTransformDataHelper<GrBitmapTextGeoProc>(primProc, pdman, index, transforms); |
| } |
| |
| static inline void GenKey(const GrGeometryProcessor& proc, |
| const GrBatchTracker& bt, |
| const GrGLSLCaps&, |
| GrProcessorKeyBuilder* b) { |
| const GrBitmapTextGeoProc& gp = proc.cast<GrBitmapTextGeoProc>(); |
| uint32_t key = 0; |
| key |= gp.usesLocalCoords() && gp.localMatrix().hasPerspective() ? 0x1 : 0x0; |
| key |= gp.colorIgnored() ? 0x2 : 0x0; |
| key |= gp.maskFormat() << 3; |
| b->add32(key); |
| |
| // Currently we hardcode numbers to convert atlas coordinates to normalized floating point |
| SkASSERT(gp.numTextures() == 1); |
| GrTexture* atlas = gp.textureAccess(0).getTexture(); |
| SkASSERT(atlas); |
| b->add32(atlas->width()); |
| b->add32(atlas->height()); |
| } |
| |
| private: |
| GrColor fColor; |
| UniformHandle fColorUniform; |
| |
| typedef GrGLGeometryProcessor INHERITED; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| GrBitmapTextGeoProc::GrBitmapTextGeoProc(GrColor color, GrTexture* texture, |
| const GrTextureParams& params, GrMaskFormat format, |
| const SkMatrix& localMatrix, bool usesLocalCoords) |
| : fColor(color) |
| , fLocalMatrix(localMatrix) |
| , fUsesLocalCoords(usesLocalCoords) |
| , fTextureAccess(texture, params) |
| , fInColor(NULL) |
| , fMaskFormat(format) { |
| this->initClassID<GrBitmapTextGeoProc>(); |
| fInPosition = &this->addVertexAttrib(Attribute("inPosition", kVec2f_GrVertexAttribType)); |
| |
| // TODO we could think about removing this attribute if color is ignored, but unfortunately |
| // we don't do text positioning in batch, so we can't quite do that yet. |
| bool hasVertexColor = kA8_GrMaskFormat == fMaskFormat; |
| if (hasVertexColor) { |
| fInColor = &this->addVertexAttrib(Attribute("inColor", kVec4ub_GrVertexAttribType)); |
| } |
| fInTextureCoords = &this->addVertexAttrib(Attribute("inTextureCoords", |
| kVec2s_GrVertexAttribType)); |
| this->addTextureAccess(&fTextureAccess); |
| } |
| |
| void GrBitmapTextGeoProc::getGLProcessorKey(const GrBatchTracker& bt, |
| const GrGLSLCaps& caps, |
| GrProcessorKeyBuilder* b) const { |
| GrGLBitmapTextGeoProc::GenKey(*this, bt, caps, b); |
| } |
| |
| GrGLPrimitiveProcessor* |
| GrBitmapTextGeoProc::createGLInstance(const GrBatchTracker& bt, |
| const GrGLSLCaps& caps) const { |
| return SkNEW_ARGS(GrGLBitmapTextGeoProc, (*this, bt)); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| GR_DEFINE_GEOMETRY_PROCESSOR_TEST(GrBitmapTextGeoProc); |
| |
| GrGeometryProcessor* GrBitmapTextGeoProc::TestCreate(GrProcessorTestData* d) { |
| int texIdx = d->fRandom->nextBool() ? GrProcessorUnitTest::kSkiaPMTextureIdx : |
| GrProcessorUnitTest::kAlphaTextureIdx; |
| static const SkShader::TileMode kTileModes[] = { |
| SkShader::kClamp_TileMode, |
| SkShader::kRepeat_TileMode, |
| SkShader::kMirror_TileMode, |
| }; |
| SkShader::TileMode tileModes[] = { |
| kTileModes[d->fRandom->nextULessThan(SK_ARRAY_COUNT(kTileModes))], |
| kTileModes[d->fRandom->nextULessThan(SK_ARRAY_COUNT(kTileModes))], |
| }; |
| GrTextureParams params(tileModes, d->fRandom->nextBool() ? GrTextureParams::kBilerp_FilterMode : |
| GrTextureParams::kNone_FilterMode); |
| |
| GrMaskFormat format; |
| switch (d->fRandom->nextULessThan(3)) { |
| case 0: |
| format = kA8_GrMaskFormat; |
| break; |
| case 1: |
| format = kA565_GrMaskFormat; |
| break; |
| case 2: |
| format = kARGB_GrMaskFormat; |
| break; |
| } |
| |
| return GrBitmapTextGeoProc::Create(GrRandomColor(d->fRandom), d->fTextures[texIdx], params, |
| format, GrTest::TestMatrix(d->fRandom), |
| d->fRandom->nextBool()); |
| } |