gecko-dev/gfx/2d/Scale.cpp
Joe Drew 7f41dae0d8 Bug 798053 - Do a more accurate test for the return value of Scale(). r=gw280
--HG--
extra : rebase_source : c26a57f060f172e9b7864eef69fa782064b4fae5
2012-10-10 11:35:23 -04:00

55 lines
1.5 KiB
C++

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "Scale.h"
#ifdef USE_SKIA
#include "HelpersSkia.h"
#include "skia/SkBitmap.h"
#include "image_operations.h"
#endif
namespace mozilla {
namespace gfx {
bool Scale(uint8_t* srcData, int32_t srcWidth, int32_t srcHeight, int32_t srcStride,
uint8_t* dstData, int32_t dstWidth, int32_t dstHeight, int32_t dstStride,
SurfaceFormat format)
{
#ifdef USE_SKIA
bool opaque;
if (format == FORMAT_B8G8R8A8) {
opaque = false;
} else {
opaque = true;
}
SkBitmap::Config config = GfxFormatToSkiaConfig(format);
SkBitmap imgSrc;
imgSrc.setConfig(config, srcWidth, srcHeight, srcStride);
imgSrc.setPixels(srcData);
imgSrc.setIsOpaque(opaque);
// Rescaler is compatible with 32 bpp only. Convert to RGB32 if needed.
if (config != SkBitmap::kARGB_8888_Config) {
imgSrc.copyTo(&imgSrc, SkBitmap::kARGB_8888_Config);
}
// This returns an SkBitmap backed by dstData; since it also wrote to dstData,
// we don't need to look at that SkBitmap.
SkBitmap result = skia::ImageOperations::Resize(imgSrc,
skia::ImageOperations::RESIZE_BEST,
dstWidth, dstHeight,
dstData);
return !result.isNull();
#else
return false;
#endif
}
}
}