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| 1 /* |
| 2 * Copyright 2015 Google Inc. |
| 3 * |
| 4 * Use of this source code is governed by a BSD-style license that can be |
| 5 * found in the LICENSE file. |
| 6 */ |
| 7 |
| 8 #include "SkBitmapProcShader.h" |
| 9 #include "SkBitmapProvider.h" |
| 10 #include "SkImage_Base.h" |
| 11 #include "SkImageShader.h" |
| 12 #include "SkReadBuffer.h" |
| 13 #include "SkWriteBuffer.h" |
| 14 |
| 15 SkImageShader::SkImageShader(const SkImage* img, TileMode tmx, TileMode tmy, con
st SkMatrix* matrix) |
| 16 : INHERITED(matrix) |
| 17 , fImage(SkRef(img)) |
| 18 , fTileModeX(tmx) |
| 19 , fTileModeY(tmy) |
| 20 {} |
| 21 |
| 22 SkFlattenable* SkImageShader::CreateProc(SkReadBuffer& buffer) { |
| 23 const TileMode tx = (TileMode)buffer.readUInt(); |
| 24 const TileMode ty = (TileMode)buffer.readUInt(); |
| 25 SkMatrix matrix; |
| 26 buffer.readMatrix(&matrix); |
| 27 SkAutoTUnref<SkImage> img(buffer.readImage()); |
| 28 if (!img) { |
| 29 return nullptr; |
| 30 } |
| 31 return new SkImageShader(img, tx, ty, &matrix); |
| 32 } |
| 33 |
| 34 void SkImageShader::flatten(SkWriteBuffer& buffer) const { |
| 35 buffer.writeUInt(fTileModeX); |
| 36 buffer.writeUInt(fTileModeY); |
| 37 buffer.writeMatrix(this->getLocalMatrix()); |
| 38 buffer.writeImage(fImage); |
| 39 } |
| 40 |
| 41 bool SkImageShader::isOpaque() const { |
| 42 return fImage->isOpaque(); |
| 43 } |
| 44 |
| 45 size_t SkImageShader::contextSize() const { |
| 46 return SkBitmapProcShader::ContextSize(); |
| 47 } |
| 48 |
| 49 SkShader::Context* SkImageShader::onCreateContext(const ContextRec& rec, void* s
torage) const { |
| 50 return SkBitmapProcShader::MakeContext(*this, fTileModeX, fTileModeY, |
| 51 SkBitmapProvider(fImage), rec, storag
e); |
| 52 } |
| 53 |
| 54 SkShader* SkImageShader::Create(const SkImage* image, TileMode tx, TileMode ty, |
| 55 const SkMatrix* localMatrix) { |
| 56 if (!image) { |
| 57 return nullptr; |
| 58 } |
| 59 return new SkImageShader(image, tx, ty, localMatrix); |
| 60 } |
| 61 |
| 62 #ifndef SK_IGNORE_TO_STRING |
| 63 void SkImageShader::toString(SkString* str) const { |
| 64 const char* gTileModeName[SkShader::kTileModeCount] = { |
| 65 "clamp", "repeat", "mirror" |
| 66 }; |
| 67 |
| 68 str->appendf("ImageShader: ((%s %s) ", gTileModeName[fTileModeX], gTileModeN
ame[fTileModeY]); |
| 69 fImage->toString(str); |
| 70 this->INHERITED::toString(str); |
| 71 str->append(")"); |
| 72 } |
| 73 #endif |
| 74 |
| 75 ////////////////////////////////////////////////////////////////////////////////
/////////////////// |
| 76 |
| 77 #if SK_SUPPORT_GPU |
| 78 |
| 79 #include "GrTextureAccess.h" |
| 80 #include "SkGr.h" |
| 81 #include "effects/GrSimpleTextureEffect.h" |
| 82 #include "effects/GrBicubicEffect.h" |
| 83 #include "effects/GrExtractAlphaFragmentProcessor.h" |
| 84 #include "effects/GrSimpleTextureEffect.h" |
| 85 |
| 86 const GrFragmentProcessor* SkImageShader::asFragmentProcessor(GrContext* context
, |
| 87 const SkMatrix& vi
ewM, |
| 88 const SkMatrix* lo
calMatrix, |
| 89 SkFilterQuality fi
lterQuality, |
| 90 GrProcessorDataMan
ager* mgr) const { |
| 91 SkMatrix matrix; |
| 92 matrix.setIDiv(fImage->width(), fImage->height()); |
| 93 |
| 94 SkMatrix lmInverse; |
| 95 if (!this->getLocalMatrix().invert(&lmInverse)) { |
| 96 return nullptr; |
| 97 } |
| 98 if (localMatrix) { |
| 99 SkMatrix inv; |
| 100 if (!localMatrix->invert(&inv)) { |
| 101 return nullptr; |
| 102 } |
| 103 lmInverse.postConcat(inv); |
| 104 } |
| 105 matrix.preConcat(lmInverse); |
| 106 |
| 107 SkShader::TileMode tm[] = { fTileModeX, fTileModeY }; |
| 108 |
| 109 // Must set wrap and filter on the sampler before requesting a texture. In t
wo places below |
| 110 // we check the matrix scale factors to determine how to interpret the filte
r quality setting. |
| 111 // This completely ignores the complexity of the drawVertices case where exp
licit local coords |
| 112 // are provided by the caller. |
| 113 bool doBicubic; |
| 114 GrTextureParams::FilterMode textureFilterMode = |
| 115 GrSkFilterQualityToGrFilterMode(filterQuality, viewM, this->getLocalMatrix()
, &doBicubic); |
| 116 GrTextureParams params(tm, textureFilterMode); |
| 117 |
| 118 SkImageUsageType usageType; |
| 119 if (kClamp_TileMode == fTileModeX && kClamp_TileMode == fTileModeY) { |
| 120 usageType = kUntiled_SkImageUsageType; |
| 121 } else if (GrTextureParams::kNone_FilterMode == textureFilterMode) { |
| 122 usageType = kTiled_Unfiltered_SkImageUsageType; |
| 123 } else { |
| 124 usageType = kTiled_Filtered_SkImageUsageType; |
| 125 } |
| 126 |
| 127 SkAutoTUnref<GrTexture> texture(as_IB(fImage)->asTextureRef(context, usageTy
pe)); |
| 128 if (!texture) { |
| 129 return nullptr; |
| 130 } |
| 131 |
| 132 SkAutoTUnref<GrFragmentProcessor> inner; |
| 133 if (doBicubic) { |
| 134 inner.reset(GrBicubicEffect::Create(mgr, texture, matrix, tm)); |
| 135 } else { |
| 136 inner.reset(GrSimpleTextureEffect::Create(mgr, texture, matrix, params))
; |
| 137 } |
| 138 |
| 139 if (GrPixelConfigIsAlphaOnly(texture->config())) { |
| 140 return SkRef(inner.get()); |
| 141 } |
| 142 return GrExtractAlphaFragmentProcessor::Create(inner); |
| 143 } |
| 144 |
| 145 #endif |
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