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/*
* 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/GrGLProcessor.h"
#include "gl/GrGLSL.h"
#include "gl/GrGLTexture.h"
#include "gl/GrGLGeometryProcessor.h"
#include "gl/builders/GrGLProgramBuilder.h"
struct BitmapTextBatchTracker {
GrGPInput fInputColorType;
GrColor fColor;
bool fUsesLocalCoords;
};
class GrGLBitmapTextGeoProc : public GrGLGeometryProcessor {
public:
GrGLBitmapTextGeoProc(const GrGeometryProcessor&, const GrBatchTracker&)
: fColor(GrColor_ILLEGAL) {}
void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) SK_OVERRIDE{
const GrBitmapTextGeoProc& cte = args.fGP.cast<GrBitmapTextGeoProc>();
const BitmapTextBatchTracker& local = args.fBT.cast<BitmapTextBatchTracker>();
GrGLGPBuilder* pb = args.fPB;
GrGLVertexBuilder* vsBuilder = pb->getVertexShaderBuilder();
// emit attributes
vsBuilder->emitAttributes(cte);
GrGLVertToFrag v(kVec2f_GrSLType);
pb->addVarying("TextureCoords", &v);
// this is only used with text, so our texture bounds always match the glyph atlas
if (cte.maskFormat() == kA8_GrMaskFormat) {
vsBuilder->codeAppendf("%s = vec2(" GR_FONT_ATLAS_A8_RECIP_WIDTH ", "
GR_FONT_ATLAS_RECIP_HEIGHT ")*%s;", v.vsOut(),
cte.inTextureCoords()->fName);
} else {
vsBuilder->codeAppendf("%s = vec2(" GR_FONT_ATLAS_RECIP_WIDTH ", "
GR_FONT_ATLAS_RECIP_HEIGHT ")*%s;", v.vsOut(),
cte.inTextureCoords()->fName);
}
// Setup pass through color
this->setupColorPassThrough(pb, local.fInputColorType, args.fOutputColor, cte.inColor(),
&fColorUniform);
// Setup position
this->setupPosition(pb, gpArgs, cte.inPosition()->fName, cte.viewMatrix());
// emit transforms
this->emitTransforms(args.fPB, gpArgs->fPositionVar, cte.inPosition()->fName,
cte.localMatrix(), args.fTransformsIn, args.fTransformsOut);
GrGLGPFragmentBuilder* 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) SK_OVERRIDE {
this->setUniformViewMatrix(pdman, gp.viewMatrix());
const BitmapTextBatchTracker& local = bt.cast<BitmapTextBatchTracker>();
if (kUniform_GrGPInput == local.fInputColorType && local.fColor != fColor) {
GrGLfloat c[4];
GrColorToRGBAFloat(local.fColor, c);
pdman.set4fv(fColorUniform, 1, c);
fColor = local.fColor;
}
}
static inline void GenKey(const GrGeometryProcessor& proc,
const GrBatchTracker& bt,
const GrGLCaps&,
GrProcessorKeyBuilder* b) {
const BitmapTextBatchTracker& local = bt.cast<BitmapTextBatchTracker>();
// We have to put the optional vertex attribute as part of the key. See the comment
// on addVertexAttrib.
// TODO When we have deferred geometry we can fix this
const GrBitmapTextGeoProc& gp = proc.cast<GrBitmapTextGeoProc>();
uint32_t key = 0;
key |= SkToBool(gp.inColor()) ? 0x1 : 0x0;
key |= local.fUsesLocalCoords && proc.localMatrix().hasPerspective() ? 0x2 : 0x0;
key |= gp.maskFormat() == kARGB_GrMaskFormat ? 0x4 : 0x0;
key |= ComputePosKey(gp.viewMatrix()) << 3;
b->add32(local.fInputColorType << 16 | key);
}
private:
GrColor fColor;
UniformHandle fColorUniform;
typedef GrGLGeometryProcessor INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
GrBitmapTextGeoProc::GrBitmapTextGeoProc(GrColor color, GrTexture* texture,
const GrTextureParams& params, GrMaskFormat format,
bool opaqueVertexColors, const SkMatrix& localMatrix)
: INHERITED(color, SkMatrix::I(), localMatrix, opaqueVertexColors)
, fTextureAccess(texture, params)
, fInColor(NULL)
, fMaskFormat(format) {
this->initClassID<GrBitmapTextGeoProc>();
fInPosition = &this->addVertexAttrib(Attribute("inPosition", kVec2f_GrVertexAttribType));
bool hasVertexColor = kA8_GrMaskFormat == fMaskFormat;
if (hasVertexColor) {
fInColor = &this->addVertexAttrib(Attribute("inColor", kVec4ub_GrVertexAttribType));
this->setHasVertexColor();
}
fInTextureCoords = &this->addVertexAttrib(Attribute("inTextureCoords",
kVec2s_GrVertexAttribType));
this->addTextureAccess(&fTextureAccess);
}
bool GrBitmapTextGeoProc::onIsEqual(const GrGeometryProcessor& other) const {
const GrBitmapTextGeoProc& gp = other.cast<GrBitmapTextGeoProc>();
return SkToBool(this->inColor()) == SkToBool(gp.inColor());
}
void GrBitmapTextGeoProc::onGetInvariantOutputColor(GrInitInvariantOutput* out) const {
if (kARGB_GrMaskFormat == fMaskFormat) {
out->setUnknownFourComponents();
}
}
void GrBitmapTextGeoProc::onGetInvariantOutputCoverage(GrInitInvariantOutput* out) const {
if (kARGB_GrMaskFormat != fMaskFormat) {
if (GrPixelConfigIsAlphaOnly(this->texture(0)->config())) {
out->setUnknownSingleComponent();
} else if (GrPixelConfigIsOpaque(this->texture(0)->config())) {
out->setUnknownOpaqueFourComponents();
out->setUsingLCDCoverage();
} else {
out->setUnknownFourComponents();
out->setUsingLCDCoverage();
}
} else {
out->setKnownSingleComponent(0xff);
}
}
void GrBitmapTextGeoProc::getGLProcessorKey(const GrBatchTracker& bt,
const GrGLCaps& caps,
GrProcessorKeyBuilder* b) const {
GrGLBitmapTextGeoProc::GenKey(*this, bt, caps, b);
}
GrGLPrimitiveProcessor*
GrBitmapTextGeoProc::createGLInstance(const GrBatchTracker& bt,
const GrGLCaps& caps) const {
return SkNEW_ARGS(GrGLBitmapTextGeoProc, (*this, bt));
}
void GrBitmapTextGeoProc::initBatchTracker(GrBatchTracker* bt, const GrPipelineInfo& init) const {
BitmapTextBatchTracker* local = bt->cast<BitmapTextBatchTracker>();
local->fInputColorType = GetColorInputType(&local->fColor, this->color(), init,
SkToBool(fInColor));
local->fUsesLocalCoords = init.fUsesLocalCoords;
}
bool GrBitmapTextGeoProc::onCanMakeEqual(const GrBatchTracker& m,
const GrGeometryProcessor& that,
const GrBatchTracker& t) const {
const BitmapTextBatchTracker& mine = m.cast<BitmapTextBatchTracker>();
const BitmapTextBatchTracker& theirs = t.cast<BitmapTextBatchTracker>();
return CanCombineLocalMatrices(*this, mine.fUsesLocalCoords,
that, theirs.fUsesLocalCoords) &&
CanCombineOutput(mine.fInputColorType, mine.fColor,
theirs.fInputColorType, theirs.fColor);
}
///////////////////////////////////////////////////////////////////////////////
GR_DEFINE_GEOMETRY_PROCESSOR_TEST(GrBitmapTextGeoProc);
GrGeometryProcessor* GrBitmapTextGeoProc::TestCreate(SkRandom* random,
GrContext*,
const GrDrawTargetCaps&,
GrTexture* textures[]) {
int texIdx = random->nextBool() ? GrProcessorUnitTest::kSkiaPMTextureIdx :
GrProcessorUnitTest::kAlphaTextureIdx;
static const SkShader::TileMode kTileModes[] = {
SkShader::kClamp_TileMode,
SkShader::kRepeat_TileMode,
SkShader::kMirror_TileMode,
};
SkShader::TileMode tileModes[] = {
kTileModes[random->nextULessThan(SK_ARRAY_COUNT(kTileModes))],
kTileModes[random->nextULessThan(SK_ARRAY_COUNT(kTileModes))],
};
GrTextureParams params(tileModes, random->nextBool() ? GrTextureParams::kBilerp_FilterMode :
GrTextureParams::kNone_FilterMode);
GrMaskFormat format;
switch (random->nextULessThan(3)) {
default:
SkFAIL("Incomplete enum\n");
case 0:
format = kA8_GrMaskFormat;
break;
case 1:
format = kA565_GrMaskFormat;
break;
case 2:
format = kARGB_GrMaskFormat;
break;
}
return GrBitmapTextGeoProc::Create(GrRandomColor(random), textures[texIdx], params,
format, random->nextBool(),
GrProcessorUnitTest::TestMatrix(random));
}
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