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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/GrSimpleTextureEffect.h" | |
| 84 | |
| 85 const GrFragmentProcessor* SkImageShader::asFragmentProcessor(GrContext* context
, | |
| 86 const SkMatrix& vi
ewM, | |
| 87 const SkMatrix* lo
calMatrix, | |
| 88 SkFilterQuality fi
lterQuality, | |
| 89 GrProcessorDataMan
ager* mgr) const { | |
| 90 SkMatrix matrix; | |
| 91 matrix.setIDiv(fImage->width(), fImage->height()); | |
| 92 | |
| 93 SkMatrix lmInverse; | |
| 94 if (!this->getLocalMatrix().invert(&lmInverse)) { | |
| 95 return nullptr; | |
| 96 } | |
| 97 if (localMatrix) { | |
| 98 SkMatrix inv; | |
| 99 if (!localMatrix->invert(&inv)) { | |
| 100 return nullptr; | |
| 101 } | |
| 102 lmInverse.postConcat(inv); | |
| 103 } | |
| 104 matrix.preConcat(lmInverse); | |
| 105 | |
| 106 SkShader::TileMode tm[] = { fTileModeX, fTileModeY }; | |
| 107 | |
| 108 // Must set wrap and filter on the sampler before requesting a texture. In t
wo places below | |
| 109 // we check the matrix scale factors to determine how to interpret the filte
r quality setting. | |
| 110 // This completely ignores the complexity of the drawVertices case where exp
licit local coords | |
| 111 // are provided by the caller. | |
| 112 bool doBicubic; | |
| 113 GrTextureParams::FilterMode textureFilterMode = | |
| 114 GrSkFilterQualityToGrFilterMode(filterQuality, viewM, this->getLocalMatrix()
, &doBicubic); | |
| 115 GrTextureParams params(tm, textureFilterMode); | |
| 116 | |
| 117 SkImageUsageType usageType; | |
| 118 if (kClamp_TileMode == fTileModeX && kClamp_TileMode == fTileModeY) { | |
| 119 usageType = kUntiled_SkImageUsageType; | |
| 120 } else if (GrTextureParams::kNone_FilterMode == textureFilterMode) { | |
| 121 usageType = kTiled_Unfiltered_SkImageUsageType; | |
| 122 } else { | |
| 123 usageType = kTiled_Filtered_SkImageUsageType; | |
| 124 } | |
| 125 | |
| 126 SkAutoTUnref<GrTexture> texture(as_IB(fImage)->asTextureRef(context, usageTy
pe)); | |
| 127 if (!texture) { | |
| 128 return nullptr; | |
| 129 } | |
| 130 | |
| 131 SkAutoTUnref<GrFragmentProcessor> inner; | |
| 132 if (doBicubic) { | |
| 133 inner.reset(GrBicubicEffect::Create(mgr, texture, matrix, tm)); | |
| 134 } else { | |
| 135 inner.reset(GrSimpleTextureEffect::Create(mgr, texture, matrix, params))
; | |
| 136 } | |
| 137 | |
| 138 if (GrPixelConfigIsAlphaOnly(texture->config())) { | |
| 139 return SkRef(inner.get()); | |
| 140 } | |
| 141 return GrFragmentProcessor::MulOuputByInputAlpha(inner); | |
| 142 } | |
| 143 | |
| 144 #endif | |
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Chromium Code Reviews
Issue 1375673002:
Revert of Revert[2] of add ImageShader, sharing code with its Bitmap cousin (Closed)
Base URL: https://skia.googlesource.com/skia.git@master