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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 "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;
};
class GrGLBitmapTextGeoProc : public GrGLGeometryProcessor {
public:
GrGLBitmapTextGeoProc(const GrGeometryProcessor&, const GrBatchTracker&)
: fColor(GrColor_ILLEGAL) {}
virtual void emitCode(const EmitArgs& args) SK_OVERRIDE {
const GrBitmapTextGeoProc& cte = args.fGP.cast<GrBitmapTextGeoProc>();
const BitmapTextBatchTracker& local = args.fBT.cast<BitmapTextBatchTracker>();
GrGLGPBuilder* pb = args.fPB;
GrGLVertexBuilder* vsBuilder = pb->getVertexShaderBuilder();
GrGLVertToFrag v(kVec2f_GrSLType);
pb->addVarying("TextureCoords", &v);
vsBuilder->codeAppendf("%s = %s;", v.vsOut(), cte.inTextureCoords()->fName);
// Setup pass through color
this->setupColorPassThrough(pb, local.fInputColorType, args.fOutputColor, cte.inColor(),
&fColorUniform);
// setup output coords
vsBuilder->codeAppendf("%s = %s;", vsBuilder->positionCoords(), cte.inPosition()->fName);
vsBuilder->codeAppendf("%s = %s;", vsBuilder->localCoords(), cte.inPosition()->fName);
// setup position varying
vsBuilder->codeAppendf("%s = %s * vec3(%s, 1);", vsBuilder->glPosition(),
vsBuilder->uViewM(), cte.inPosition()->fName);
GrGLGPFragmentBuilder* fsBuilder = pb->getFragmentShaderBuilder();
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 {
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>();
b->add32(SkToBool(gp.inColor()));
b->add32(local.fInputColorType);
}
private:
GrColor fColor;
UniformHandle fColorUniform;
typedef GrGLGeometryProcessor INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
GrBitmapTextGeoProc::GrBitmapTextGeoProc(GrColor color, GrTexture* texture,
const GrTextureParams& params, bool useColorAttrib,
bool opaqueVertexColors)
: INHERITED(color, opaqueVertexColors), fTextureAccess(texture, params), fInColor(NULL) {
this->initClassID<GrBitmapTextGeoProc>();
fInPosition = &this->addVertexAttrib(GrAttribute("inPosition", kVec2f_GrVertexAttribType));
if (useColorAttrib) {
fInColor = &this->addVertexAttrib(GrAttribute("inColor", kVec4ub_GrVertexAttribType));
this->setHasVertexColor();
}
fInTextureCoords = &this->addVertexAttrib(GrAttribute("inTextureCoords",
kVec2f_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::onGetInvariantOutputCoverage(GrInitInvariantOutput* out) const {
if (GrPixelConfigIsAlphaOnly(this->texture(0)->config())) {
out->setUnknownSingleComponent();
} else if (GrPixelConfigIsOpaque(this->texture(0)->config())) {
out->setUnknownOpaqueFourComponents();
out->setUsingLCDCoverage();
} else {
out->setUnknownFourComponents();
out->setUsingLCDCoverage();
}
}
void GrBitmapTextGeoProc::getGLProcessorKey(const GrBatchTracker& bt,
const GrGLCaps& caps,
GrProcessorKeyBuilder* b) const {
GrGLBitmapTextGeoProc::GenKey(*this, bt, caps, b);
}
GrGLGeometryProcessor*
GrBitmapTextGeoProc::createGLInstance(const GrBatchTracker& bt) const {
return SkNEW_ARGS(GrGLBitmapTextGeoProc, (*this, bt));
}
void GrBitmapTextGeoProc::initBatchTracker(GrBatchTracker* bt, const InitBT& init) const {
BitmapTextBatchTracker* local = bt->cast<BitmapTextBatchTracker>();
local->fInputColorType = GetColorInputType(&local->fColor, this->color(), init,
SkToBool(fInColor));
}
bool GrBitmapTextGeoProc::onCanMakeEqual(const GrBatchTracker& m, const GrBatchTracker& t) const {
const BitmapTextBatchTracker& mine = m.cast<BitmapTextBatchTracker>();
const BitmapTextBatchTracker& theirs = t.cast<BitmapTextBatchTracker>();
return 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);
return GrBitmapTextGeoProc::Create(GrRandomColor(random), textures[texIdx], params,
random->nextBool(), random->nextBool());
}
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