Matt Sarett | 2e61b18 | 2017-05-09 12:46:50 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2017 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 "gm.h" |
| 9 | #include "SkImage.h" |
Mike Reed | 7fcfb62 | 2018-02-09 13:26:46 -0500 | [diff] [blame] | 10 | #include "SkImageInfoPriv.h" |
Matt Sarett | 2e61b18 | 2017-05-09 12:46:50 -0400 | [diff] [blame] | 11 | #include "SkJpegEncoder.h" |
| 12 | |
| 13 | #include "Resources.h" |
| 14 | |
| 15 | namespace skiagm { |
| 16 | |
| 17 | static inline void read_into_pixmap(SkPixmap* dst, SkImageInfo dstInfo, void* dstPixels, |
| 18 | sk_sp<SkImage> src) { |
| 19 | dst->reset(dstInfo, dstPixels, dstInfo.minRowBytes()); |
| 20 | src->readPixels(*dst, 0, 0, SkImage::CachingHint::kDisallow_CachingHint); |
| 21 | } |
| 22 | |
| 23 | static inline sk_sp<SkImage> encode_pixmap_and_make_image(const SkPixmap& src, |
| 24 | SkJpegEncoder::AlphaOption alphaOption, SkTransferFunctionBehavior blendBehavior) { |
| 25 | SkDynamicMemoryWStream dst; |
| 26 | SkJpegEncoder::Options options; |
| 27 | options.fAlphaOption = alphaOption; |
| 28 | options.fBlendBehavior = blendBehavior; |
| 29 | SkJpegEncoder::Encode(&dst, src, options); |
| 30 | return SkImage::MakeFromEncoded(dst.detachAsData()); |
| 31 | } |
| 32 | |
| 33 | class EncodeJpegAlphaOptsGM : public GM { |
| 34 | public: |
| 35 | EncodeJpegAlphaOptsGM() {} |
| 36 | |
| 37 | protected: |
| 38 | SkString onShortName() override { |
| 39 | return SkString("encode-alpha-jpeg"); |
| 40 | } |
| 41 | |
| 42 | SkISize onISize() override { |
| 43 | return SkISize::Make(400, 200); |
| 44 | } |
| 45 | |
| 46 | void onDraw(SkCanvas* canvas) override { |
Hal Canary | c465d13 | 2017-12-08 10:21:31 -0500 | [diff] [blame] | 47 | sk_sp<SkImage> srcImg = GetResourceAsImage("images/rainbow-gradient.png"); |
Matt Sarett | 2e61b18 | 2017-05-09 12:46:50 -0400 | [diff] [blame] | 48 | fStorage.reset(srcImg->width() * srcImg->height() * |
| 49 | SkColorTypeBytesPerPixel(kRGBA_F16_SkColorType)); |
| 50 | |
| 51 | SkPixmap src; |
| 52 | SkImageInfo info = SkImageInfo::MakeN32Premul(srcImg->width(), srcImg->height(), |
| 53 | canvas->imageInfo().colorSpace() ? SkColorSpace::MakeSRGB() : nullptr); |
| 54 | read_into_pixmap(&src, info, fStorage.get(), srcImg); |
| 55 | |
| 56 | SkTransferFunctionBehavior behavior = canvas->imageInfo().colorSpace() ? |
| 57 | SkTransferFunctionBehavior::kRespect : SkTransferFunctionBehavior::kIgnore; |
| 58 | |
| 59 | // Encode 8888 premul. |
| 60 | sk_sp<SkImage> img0 = encode_pixmap_and_make_image(src, SkJpegEncoder::AlphaOption::kIgnore, |
| 61 | behavior); |
| 62 | sk_sp<SkImage> img1 = encode_pixmap_and_make_image(src, |
| 63 | SkJpegEncoder::AlphaOption::kBlendOnBlack, behavior); |
| 64 | canvas->drawImage(img0, 0.0f, 0.0f); |
| 65 | canvas->drawImage(img1, 0.0f, 100.0f); |
| 66 | |
| 67 | // Encode 8888 unpremul |
| 68 | info = info.makeAlphaType(kUnpremul_SkAlphaType); |
| 69 | read_into_pixmap(&src, info, fStorage.get(), srcImg); |
| 70 | img0 = encode_pixmap_and_make_image(src, SkJpegEncoder::AlphaOption::kIgnore, behavior); |
| 71 | img1 = encode_pixmap_and_make_image(src, SkJpegEncoder::AlphaOption::kBlendOnBlack, |
| 72 | behavior); |
| 73 | canvas->drawImage(img0, 100.0f, 0.0f); |
| 74 | canvas->drawImage(img1, 100.0f, 100.0f); |
| 75 | |
| 76 | if (canvas->imageInfo().colorSpace()) { |
| 77 | // Encode F16 premul |
| 78 | info = SkImageInfo::Make(srcImg->width(), srcImg->height(), kRGBA_F16_SkColorType, |
| 79 | kPremul_SkAlphaType, SkColorSpace::MakeSRGBLinear()); |
| 80 | read_into_pixmap(&src, info, fStorage.get(), srcImg); |
| 81 | img0 = encode_pixmap_and_make_image(src, SkJpegEncoder::AlphaOption::kIgnore, behavior); |
| 82 | img1 = encode_pixmap_and_make_image(src, SkJpegEncoder::AlphaOption::kBlendOnBlack, |
| 83 | behavior); |
| 84 | canvas->drawImage(img0, 200.0f, 0.0f); |
| 85 | canvas->drawImage(img1, 200.0f, 100.0f); |
| 86 | |
| 87 | // Encode F16 unpremul |
| 88 | info = info.makeAlphaType(kUnpremul_SkAlphaType); |
| 89 | read_into_pixmap(&src, info, fStorage.get(), srcImg); |
| 90 | img0 = encode_pixmap_and_make_image(src, SkJpegEncoder::AlphaOption::kIgnore, behavior); |
| 91 | img1 = encode_pixmap_and_make_image(src, SkJpegEncoder::AlphaOption::kBlendOnBlack, |
| 92 | behavior); |
| 93 | canvas->drawImage(img0, 300.0f, 0.0f); |
| 94 | canvas->drawImage(img1, 300.0f, 100.0f); |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | private: |
| 99 | SkAutoTMalloc<uint8_t> fStorage; |
| 100 | |
| 101 | typedef GM INHERITED; |
| 102 | }; |
| 103 | |
| 104 | DEF_GM( return new EncodeJpegAlphaOptsGM; ) |
| 105 | |
| 106 | }; |