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| author | Wei-Ta Chen <weita@google.com> | 2010-12-03 14:32:42 -0800 |
|---|---|---|
| committer | Wei-Ta Chen <weita@google.com> | 2010-12-06 14:20:05 -0800 |
| commit | 11367612f6a2e15b3008920bcb1ce2793c350c3d (patch) | |
| tree | be77e7af994dccdd84cd5ab6903cb42c11e15b28 /src | |
| parent | afe4eb88f1f4ace85dbf386c17a5f40bc1b8c16d (diff) | |
| download | external_skia-11367612f6a2e15b3008920bcb1ce2793c350c3d.zip external_skia-11367612f6a2e15b3008920bcb1ce2793c350c3d.tar.gz external_skia-11367612f6a2e15b3008920bcb1ce2793c350c3d.tar.bz2 | |
Add fPreferQualityOverSpeed to SkImageDecoder.
Currently the field only affects JPEG decode, in that when it is set
to true, we choose a more accurate, but slightly slower, IDCT method.
Bug: 3238925
Change-Id: I7da20de7281243dc3e246b328517df10039cd290
Diffstat (limited to 'src')
| -rw-r--r-- | src/images/SkImageDecoder_libjpeg.cpp | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/src/images/SkImageDecoder_libjpeg.cpp b/src/images/SkImageDecoder_libjpeg.cpp index dc6ac5b..7e425c1 100644 --- a/src/images/SkImageDecoder_libjpeg.cpp +++ b/src/images/SkImageDecoder_libjpeg.cpp @@ -236,7 +236,12 @@ bool SkJPEGImageDecoder::onDecode(SkStream* stream, SkBitmap* bm, Mode mode) { */ int sampleSize = this->getSampleSize(); - cinfo.dct_method = JDCT_IFAST; + if (this->getPreferQualityOverSpeed()) { + cinfo.dct_method = JDCT_ISLOW; + } else { + cinfo.dct_method = JDCT_IFAST; + } + cinfo.scale_num = 1; cinfo.scale_denom = sampleSize; @@ -464,7 +469,6 @@ bool SkJPEGImageDecoder::onBuildTileIndex(SkStream* stream, index->index = (huffman_index*)malloc(sizeof(huffman_index)); jpeg_create_huffman_index(cinfo, index->index); - cinfo->dct_method = JDCT_IFAST; cinfo->scale_num = 1; cinfo->scale_denom = 1; if (!jpeg_build_huffman_index(cinfo, index->index)) { @@ -493,7 +497,6 @@ bool SkJPEGImageDecoder::onBuildTileIndex(SkStream* stream, //jpeg_start_decompress(cinfo); jpeg_start_tile_decompress(cinfo); - cinfo->dct_method = JDCT_IFAST; cinfo->scale_num = 1; index->cinfo = cinfo; *height = cinfo->output_height; @@ -522,6 +525,12 @@ bool SkJPEGImageDecoder::onDecodeRegion(SkBitmap* bm, SkIRect region) { int requestedSampleSize = this->getSampleSize(); cinfo->scale_denom = requestedSampleSize; + if (this->getPreferQualityOverSpeed()) { + cinfo->dct_method = JDCT_ISLOW; + } else { + cinfo->dct_method = JDCT_IFAST; + } + SkBitmap::Config config = this->getPrefConfig(k32Bit_SrcDepth, false); if (config != SkBitmap::kARGB_8888_Config && config != SkBitmap::kARGB_4444_Config && |