The Tor Browser: gfx/2d/Scale.cpp@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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/. */

     5 #include "Scale.h"

     7 #ifdef USE_SKIA

     8 #include "HelpersSkia.h"

     9 #include "skia/SkBitmap.h"

    10 #include "image_operations.h"

    11 #endif

    13 namespace mozilla {

    14 namespace gfx {

    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   }

    28   SkBitmap::Config config = GfxFormatToSkiaConfig(format);

    30   SkBitmap imgSrc;

    31   imgSrc.setConfig(config, srcWidth, srcHeight, srcStride, alphaType);

    32   imgSrc.setPixels(srcData);

    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   }

    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);

    46   return !result.isNull();

    47 #else

    48   return false;

    49 #endif

    50 }

    52 }

    53 }

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