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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkBitmapProcShader.h"
#include "SkBitmapProvider.h"
#include "SkImage_Base.h"
#include "SkImageShader.h"
#include "SkReadBuffer.h"
#include "SkWriteBuffer.h"
SkImageShader::SkImageShader(const SkImage* img, TileMode tmx, TileMode tmy, const SkMatrix* matrix)
: INHERITED(matrix)
, fImage(SkRef(img))
, fTileModeX(tmx)
, fTileModeY(tmy)
{}
SkFlattenable* SkImageShader::CreateProc(SkReadBuffer& buffer) {
const TileMode tx = (TileMode)buffer.readUInt();
const TileMode ty = (TileMode)buffer.readUInt();
SkMatrix matrix;
buffer.readMatrix(&matrix);
SkAutoTUnref<SkImage> img(buffer.readImage());
if (!img) {
return nullptr;
}
return new SkImageShader(img, tx, ty, &matrix);
}
void SkImageShader::flatten(SkWriteBuffer& buffer) const {
buffer.writeUInt(fTileModeX);
buffer.writeUInt(fTileModeY);
buffer.writeMatrix(this->getLocalMatrix());
buffer.writeImage(fImage);
}
bool SkImageShader::isOpaque() const {
return fImage->isOpaque();
}
size_t SkImageShader::contextSize() const {
return SkBitmapProcShader::ContextSize();
}
SkShader::Context* SkImageShader::onCreateContext(const ContextRec& rec, void* storage) const {
return SkBitmapProcShader::MakeContext(*this, fTileModeX, fTileModeY,
SkBitmapProvider(fImage), rec, storage);
}
SkShader* SkImageShader::Create(const SkImage* image, TileMode tx, TileMode ty,
const SkMatrix* localMatrix) {
if (!image) {
return nullptr;
}
return new SkImageShader(image, tx, ty, localMatrix);
}
#ifndef SK_IGNORE_TO_STRING
void SkImageShader::toString(SkString* str) const {
const char* gTileModeName[SkShader::kTileModeCount] = {
"clamp", "repeat", "mirror"
};
str->appendf("ImageShader: ((%s %s) ", gTileModeName[fTileModeX], gTileModeName[fTileModeY]);
fImage->toString(str);
this->INHERITED::toString(str);
str->append(")");
}
#endif
///////////////////////////////////////////////////////////////////////////////////////////////////
#if SK_SUPPORT_GPU
#include "GrTextureAccess.h"
#include "SkGr.h"
#include "effects/GrSimpleTextureEffect.h"
#include "effects/GrBicubicEffect.h"
#include "effects/GrExtractAlphaFragmentProcessor.h"
#include "effects/GrSimpleTextureEffect.h"
const GrFragmentProcessor* SkImageShader::asFragmentProcessor(GrContext* context,
const SkMatrix& viewM,
const SkMatrix* localMatrix,
SkFilterQuality filterQuality,
GrProcessorDataManager* mgr) const {
SkMatrix matrix;
matrix.setIDiv(fImage->width(), fImage->height());
SkMatrix lmInverse;
if (!this->getLocalMatrix().invert(&lmInverse)) {
return nullptr;
}
if (localMatrix) {
SkMatrix inv;
if (!localMatrix->invert(&inv)) {
return nullptr;
}
lmInverse.postConcat(inv);
}
matrix.preConcat(lmInverse);
SkShader::TileMode tm[] = { fTileModeX, fTileModeY };
// Must set wrap and filter on the sampler before requesting a texture. In two places below
// we check the matrix scale factors to determine how to interpret the filter quality setting.
// This completely ignores the complexity of the drawVertices case where explicit local coords
// are provided by the caller.
bool doBicubic;
GrTextureParams::FilterMode textureFilterMode =
GrSkFilterQualityToGrFilterMode(filterQuality, viewM, this->getLocalMatrix(), &doBicubic);
GrTextureParams params(tm, textureFilterMode);
SkImageUsageType usageType;
if (kClamp_TileMode == fTileModeX && kClamp_TileMode == fTileModeY) {
usageType = kUntiled_SkImageUsageType;
} else if (GrTextureParams::kNone_FilterMode == textureFilterMode) {
usageType = kTiled_Unfiltered_SkImageUsageType;
} else {
usageType = kTiled_Filtered_SkImageUsageType;
}
SkAutoTUnref<GrTexture> texture(as_IB(fImage)->asTextureRef(context, usageType));
if (!texture) {
return nullptr;
}
SkAutoTUnref<GrFragmentProcessor> inner;
if (doBicubic) {
inner.reset(GrBicubicEffect::Create(mgr, texture, matrix, tm));
} else {
inner.reset(GrSimpleTextureEffect::Create(mgr, texture, matrix, params));
}
if (GrPixelConfigIsAlphaOnly(texture->config())) {
return SkRef(inner.get());
}
return GrExtractAlphaFragmentProcessor::Create(inner);
}
#endif
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