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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 "SkImageGeneratorUtils.h" |
| 9 #include "SkBitmap.h" |
| 10 |
| 11 class GeneratorFromEmpty : public SkImageGenerator { |
| 12 public: |
| 13 GeneratorFromEmpty(const SkImageInfo& info) : SkImageGenerator(info) {} |
| 14 }; |
| 15 |
| 16 SkImageGenerator* SkImageGeneratorUtils::NewEmpty(const SkImageInfo& info) { |
| 17 return SkNEW_ARGS(GeneratorFromEmpty, (info)); |
| 18 } |
| 19 |
| 20 ////////////////////////////////////////////////////////////////////////////////
/////////////////// |
| 21 |
| 22 class GeneratorFromBitmap : public SkImageGenerator { |
| 23 public: |
| 24 GeneratorFromBitmap(const SkBitmap& bm) : SkImageGenerator(bm.info()), fBM(b
m) { |
| 25 if (!bm.isImmutable()) { |
| 26 bm.copyTo(&fBM); |
| 27 } |
| 28 } |
| 29 |
| 30 protected: |
| 31 bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, |
| 32 SkPMColor*, int*) override { |
| 33 return fBM.readPixels(info, pixels, rowBytes, 0, 0); |
| 34 } |
| 35 |
| 36 private: |
| 37 SkBitmap fBM; |
| 38 }; |
| 39 |
| 40 SkImageGenerator* SkImageGeneratorUtils::NewFromBitmap(const SkBitmap& bm) { |
| 41 return SkNEW_ARGS(GeneratorFromBitmap, (bm)); |
| 42 } |
| 43 |
| 44 ////////////////////////////////////////////////////////////////////////////////
/////////////////// |
| 45 |
| 46 #if SK_SUPPORT_GPU |
| 47 |
| 48 #include "GrContext.h" |
| 49 #include "GrTexture.h" |
| 50 #include "SkGr.h" |
| 51 |
| 52 class GeneratorFromTexture : public SkImageGenerator { |
| 53 public: |
| 54 GeneratorFromTexture(GrContext* ctx, GrTexture* tex, const SkImageInfo& info
) |
| 55 : SkImageGenerator(info), fCtx(ctx), fTexture(tex) |
| 56 {} |
| 57 |
| 58 protected: |
| 59 GrTexture* onGenerateTexture(GrContext* ctx, SkImageUsageType, const SkIRect
* subset) override { |
| 60 if (ctx) { |
| 61 SkASSERT(ctx == fCtx.get()); |
| 62 } |
| 63 |
| 64 if (!subset) { |
| 65 return SkRef(fTexture.get()); |
| 66 } |
| 67 // need to copy the subset into a new texture |
| 68 GrSurfaceDesc desc = fTexture->desc(); |
| 69 desc.fWidth = subset->width(); |
| 70 desc.fHeight = subset->height(); |
| 71 |
| 72 GrTexture* dst = fCtx->textureProvider()->createTexture(desc, false); |
| 73 fCtx->copySurface(dst, fTexture, *subset, SkIPoint::Make(0, 0)); |
| 74 return dst; |
| 75 } |
| 76 private: |
| 77 SkAutoTUnref<GrContext> fCtx; |
| 78 SkAutoTUnref<GrTexture> fTexture; |
| 79 }; |
| 80 #endif |
| 81 |
| 82 SkImageGenerator* SkImageGeneratorUtils::NewFromTexture(GrContext* ctx, GrTextur
e* tex) { |
| 83 #if SK_SUPPORT_GPU |
| 84 if (ctx && tex) { |
| 85 const GrSurfaceDesc desc = tex->desc(); |
| 86 |
| 87 SkColorType ct; |
| 88 SkColorProfileType cpt; |
| 89 if (!GrPixelConfig2ColorAndProfileType(desc.fConfig, &ct, &cpt)) { |
| 90 return nullptr; |
| 91 } |
| 92 const SkAlphaType at = kPremul_SkAlphaType; // take isOpaque from caller
? |
| 93 SkImageInfo info = SkImageInfo::Make(desc.fWidth, desc.fHeight, ct, at,
cpt); |
| 94 return SkNEW_ARGS(GeneratorFromTexture, (ctx, tex, info)); |
| 95 } |
| 96 #endif |
| 97 return nullptr; |
| 98 } |
| 99 |
| 100 ////////////////////////////////////////////////////////////////////////////////
/////////////////// |
| 101 |
| 102 #include "SkImage.h" |
| 103 |
| 104 class GeneratorFromImage : public SkImageGenerator { |
| 105 public: |
| 106 GeneratorFromImage(const SkImage* image, const SkImageInfo& info) |
| 107 : SkImageGenerator(info), fImage(image) {} |
| 108 |
| 109 protected: |
| 110 bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, |
| 111 SkPMColor*, int*) override { |
| 112 return fImage->readPixels(info, pixels, rowBytes, 0, 0); |
| 113 } |
| 114 |
| 115 GrTexture* onGenerateTexture(GrContext* ctx, SkImageUsageType, const SkIRect
* subset) override { |
| 116 // waiting on https://code.google.com/p/skia/issues/detail?id=4233 |
| 117 return nullptr; |
| 118 } |
| 119 |
| 120 private: |
| 121 SkAutoTUnref<const SkImage> fImage; |
| 122 }; |
| 123 |
| 124 SkImageGenerator* SkImageGeneratorUtils::NewFromImage(const SkImage* image) { |
| 125 if (image) { |
| 126 const SkColorType ct = kN32_SkColorType; |
| 127 const SkAlphaType at = image->isOpaque() ? kOpaque_SkAlphaType : kPremul
_SkAlphaType; |
| 128 const SkImageInfo info = SkImageInfo::Make(image->width(), image->height
(), ct, at); |
| 129 return SkNEW_ARGS(GeneratorFromImage, (image, info)); |
| 130 } |
| 131 return nullptr; |
| 132 } |
| 133 |
| 134 |
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