| /* |
| * 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 "SkImageGeneratorUtils.h" |
| #include "SkBitmap.h" |
| |
| class GeneratorFromEmpty : public SkImageGenerator { |
| public: |
| GeneratorFromEmpty(const SkImageInfo& info) : SkImageGenerator(info) {} |
| }; |
| |
| SkImageGenerator* SkImageGeneratorUtils::NewEmpty(const SkImageInfo& info) { |
| return SkNEW_ARGS(GeneratorFromEmpty, (info)); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| class GeneratorFromBitmap : public SkImageGenerator { |
| public: |
| GeneratorFromBitmap(const SkBitmap& bm) : SkImageGenerator(bm.info()), fBM(bm) { |
| if (!bm.isImmutable()) { |
| bm.copyTo(&fBM); |
| } |
| } |
| |
| protected: |
| bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, |
| SkPMColor*, int*) override { |
| return fBM.readPixels(info, pixels, rowBytes, 0, 0); |
| } |
| |
| private: |
| SkBitmap fBM; |
| }; |
| |
| SkImageGenerator* SkImageGeneratorUtils::NewFromBitmap(const SkBitmap& bm) { |
| return SkNEW_ARGS(GeneratorFromBitmap, (bm)); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| #if SK_SUPPORT_GPU |
| |
| #include "GrContext.h" |
| #include "GrTexture.h" |
| #include "SkGr.h" |
| |
| class GeneratorFromTexture : public SkImageGenerator { |
| public: |
| GeneratorFromTexture(GrContext* ctx, GrTexture* tex, const SkImageInfo& info) |
| : SkImageGenerator(info), fCtx(ctx), fTexture(tex) |
| {} |
| |
| protected: |
| GrTexture* onGenerateTexture(GrContext* ctx, SkImageUsageType, const SkIRect* subset) override { |
| if (ctx) { |
| SkASSERT(ctx == fCtx.get()); |
| } |
| |
| if (!subset) { |
| return SkRef(fTexture.get()); |
| } |
| // need to copy the subset into a new texture |
| GrSurfaceDesc desc = fTexture->desc(); |
| desc.fWidth = subset->width(); |
| desc.fHeight = subset->height(); |
| |
| GrTexture* dst = fCtx->textureProvider()->createTexture(desc, false); |
| fCtx->copySurface(dst, fTexture, *subset, SkIPoint::Make(0, 0)); |
| return dst; |
| } |
| private: |
| SkAutoTUnref<GrContext> fCtx; |
| SkAutoTUnref<GrTexture> fTexture; |
| }; |
| #endif |
| |
| SkImageGenerator* SkImageGeneratorUtils::NewFromTexture(GrContext* ctx, GrTexture* tex) { |
| #if SK_SUPPORT_GPU |
| if (ctx && tex) { |
| const GrSurfaceDesc desc = tex->desc(); |
| |
| SkColorType ct; |
| SkColorProfileType cpt; |
| if (!GrPixelConfig2ColorAndProfileType(desc.fConfig, &ct, &cpt)) { |
| return nullptr; |
| } |
| const SkAlphaType at = kPremul_SkAlphaType; // take isOpaque from caller? |
| SkImageInfo info = SkImageInfo::Make(desc.fWidth, desc.fHeight, ct, at, cpt); |
| return SkNEW_ARGS(GeneratorFromTexture, (ctx, tex, info)); |
| } |
| #endif |
| return nullptr; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| #include "SkImage.h" |
| |
| class GeneratorFromImage : public SkImageGenerator { |
| public: |
| GeneratorFromImage(const SkImage* image, const SkImageInfo& info) |
| : SkImageGenerator(info), fImage(image) {} |
| |
| protected: |
| bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, |
| SkPMColor*, int*) override { |
| return fImage->readPixels(info, pixels, rowBytes, 0, 0); |
| } |
| |
| GrTexture* onGenerateTexture(GrContext* ctx, SkImageUsageType, const SkIRect* subset) override { |
| // waiting on https://code.google.com/p/skia/issues/detail?id=4233 |
| return nullptr; |
| } |
| |
| private: |
| SkAutoTUnref<const SkImage> fImage; |
| }; |
| |
| SkImageGenerator* SkImageGeneratorUtils::NewFromImage(const SkImage* image) { |
| if (image) { |
| const SkColorType ct = kN32_SkColorType; |
| const SkAlphaType at = image->isOpaque() ? kOpaque_SkAlphaType : kPremul_SkAlphaType; |
| const SkImageInfo info = SkImageInfo::Make(image->width(), image->height(), ct, at); |
| return SkNEW_ARGS(GeneratorFromImage, (image, info)); |
| } |
| return nullptr; |
| } |
| |
| |