AuroraMiddleware/skia2
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Change computeOutputColorType() to mimic old behavior

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This will prevent behavior changes in BitmapFactory when
switching from SkImageDecoder to SkAndroidCodec.

We will only choose kGray8 if it is explicitly requested (and
also supported).

Additionally, we will always decode GIFS and WBMPS to
kIndex8.

BUG=skia:

Review URL: https://codereview.chromium.org/1519843002
This commit is contained in:
msarett 2015-12-11 10:37:39 -08:00 committed by Commit bot
parent 061aaa79f7
commit 457f54df1e
1 changed files with 14 additions and 0 deletions
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14
src/codec/SkAndroidCodec.cpp
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@ -51,6 +51,13 @@ SkAndroidCodec* SkAndroidCodec::NewFromData(SkData* data, SkPngChunkReader* chun
}
SkColorType SkAndroidCodec::computeOutputColorType(SkColorType requestedColorType) {
// The legacy GIF and WBMP decoders always decode to kIndex_8_SkColorType.
// We will maintain this behavior.
SkEncodedFormat format = this->getEncodedFormat();
if (kGIF_SkEncodedFormat == format || kWBMP_SkEncodedFormat == format) {
return kIndex_8_SkColorType;
}
SkColorType suggestedColorType = this->getInfo().colorType();
switch (requestedColorType) {
case kARGB_4444_SkColorType:
@ -79,6 +86,13 @@ SkColorType SkAndroidCodec::computeOutputColorType(SkColorType requestedColorTyp
break;
}
// Android has limited support for kGray_8 (using kAlpha_8). We will not
// use kGray_8 for Android unless they specifically ask for it.
if (kGray_8_SkColorType == suggestedColorType) {
return kN32_SkColorType;
}
// This may be kN32_SkColorType or kIndex_8_SkColorType.
return suggestedColorType;
}