| /* |
| * 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 "SkGrPriv.h" |
| #include "effects/GrSimpleTextureEffect.h" |
| #include "effects/GrBicubicEffect.h" |
| #include "effects/GrSimpleTextureEffect.h" |
| |
| const GrFragmentProcessor* SkImageShader::asFragmentProcessor(GrContext* context, |
| const SkMatrix& viewM, |
| const SkMatrix* localMatrix, |
| SkFilterQuality filterQuality) 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(texture, matrix, tm)); |
| } else { |
| inner.reset(GrSimpleTextureEffect::Create(texture, matrix, params)); |
| } |
| |
| if (GrPixelConfigIsAlphaOnly(texture->config())) { |
| return SkRef(inner.get()); |
| } |
| return GrFragmentProcessor::MulOutputByInputAlpha(inner); |
| } |
| |
| #endif |