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comparison: gfx/2d/Scale.cpp
gfx/2d/Scale.cpp
- changeset 0
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| -1:000000000000 | 0:3effd83c5410 |
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| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 #include "Scale.h" | |
| 6 | |
| 7 #ifdef USE_SKIA | |
| 8 #include "HelpersSkia.h" | |
| 9 #include "skia/SkBitmap.h" | |
| 10 #include "image_operations.h" | |
| 11 #endif | |
| 12 | |
| 13 namespace mozilla { | |
| 14 namespace gfx { | |
| 15 | |
| 16 bool Scale(uint8_t* srcData, int32_t srcWidth, int32_t srcHeight, int32_t srcStride, | |
| 17 uint8_t* dstData, int32_t dstWidth, int32_t dstHeight, int32_t dstStride, | |
| 18 SurfaceFormat format) | |
| 19 { | |
| 20 #ifdef USE_SKIA | |
| 21 SkAlphaType alphaType; | |
| 22 if (format == SurfaceFormat::B8G8R8A8) { | |
| 23 alphaType = kPremul_SkAlphaType; | |
| 24 } else { | |
| 25 alphaType = kOpaque_SkAlphaType; | |
| 26 } | |
| 27 | |
| 28 SkBitmap::Config config = GfxFormatToSkiaConfig(format); | |
| 29 | |
| 30 SkBitmap imgSrc; | |
| 31 imgSrc.setConfig(config, srcWidth, srcHeight, srcStride, alphaType); | |
| 32 imgSrc.setPixels(srcData); | |
| 33 | |
| 34 // Rescaler is compatible with 32 bpp only. Convert to RGB32 if needed. | |
| 35 if (config != SkBitmap::kARGB_8888_Config) { | |
| 36 imgSrc.copyTo(&imgSrc, kRGBA_8888_SkColorType); | |
| 37 } | |
| 38 | |
| 39 // This returns an SkBitmap backed by dstData; since it also wrote to dstData, | |
| 40 // we don't need to look at that SkBitmap. | |
| 41 SkBitmap result = skia::ImageOperations::Resize(imgSrc, | |
| 42 skia::ImageOperations::RESIZE_BEST, | |
| 43 dstWidth, dstHeight, | |
| 44 dstData); | |
| 45 | |
| 46 return !result.isNull(); | |
| 47 #else | |
| 48 return false; | |
| 49 #endif | |
| 50 } | |
| 51 | |
| 52 } | |
| 53 } |
