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77b020b374
Pillow/libImaging
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Benjamin Gilbert 77b020b374 Special-case opaque pixels in RGBa unpacker 
Avoid the expensive multiply and divide when the pixel is opaque.
On my system, this change gives a 5.76x speedup loading an opaque image
with this call:

    PIL.Image.frombuffer('RGBA', (1000, 1000), buf, 'raw', 'RGBa', 0, 1)
2015-01-24 01:13:58 -05:00
..
Access.c Storage, packing and access for HSV format images 2014-07-22 16:09:22 -07:00
AlphaComposite.c add parentheses to avoid warnings 2013-03-27 23:19:04 +04:00
Bands.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
Bit.h Forking PIL 2010-07-30 22:52:47 -04:00
BitDecode.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
Blend.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
BoxBlur.c Fix msvc compiler error 2014-12-15 14:44:12 -08:00
Chops.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
Convert.c backup implementation of Round for windows platforms 2014-08-24 16:37:54 -07:00
ConvertYCbCr.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
Copy.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
Crc32.c Forking PIL 2010-07-30 22:52:47 -04:00
Crop.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
Dib.c Clean up defines and includes for Windows 2014-05-09 21:05:30 +02:00
Draw.c Remove unused variable in libImaging 2014-10-02 07:48:12 +10:00
Effects.c Test mandelbrot with bad arguments 2014-09-02 16:39:35 +03:00
EpsEncode.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
Except.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
File.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
Fill.c Fix compile error with msvc 2013-03-13 17:33:16 -07:00
Filter.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
FliDecode.c Forking PIL 2010-07-30 22:52:47 -04:00
Geometry.c replace resize implementation 2014-11-09 21:52:16 +03:00
GetBBox.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
Gif.h Change unsigned INT16 to UINT16 2014-04-30 11:30:44 +02:00
GifDecode.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
GifEncode.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
HexDecode.c Forking PIL 2010-07-30 22:52:47 -04:00
Histo.c Switching to strncpy, fixing potential buffer overflow in palette as well 2013-03-14 20:46:23 -07:00
Imaging.h Use Py_ssize_t instead of ssize_t 2014-12-19 01:30:16 -08:00
ImDib.h Clean up defines and includes for Windows 2014-05-09 21:05:30 +02:00
ImPlatform.h fix performance regression on 64 bit GCC 4.8. 2014-11-09 03:05:57 +03:00
Incremental.c Use Py_ssize_t instead of ssize_t 2014-12-19 01:28:21 -08:00
Jpeg.h Memory Leak: Freeing malloc'd memory in Jpeg Encode 2014-09-24 15:46:24 -07:00
Jpeg2K.h Added support for OpenJPEG 2.1. 2014-05-27 12:43:54 +01:00
Jpeg2KDecode.c Cleaning up. 2014-09-12 22:09:27 -07:00
Jpeg2KEncode.c Remove executable permissions from Jpeg2KEncode.c 2014-10-03 09:57:32 +02:00
JpegDecode.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
JpegEncode.c Memory Leak: Freeing malloc'd memory in Jpeg Encode 2014-09-24 15:46:24 -07:00
Lzw.h Change unsigned INT16 to UINT16 2014-04-30 11:30:44 +02:00
LzwDecode.c Forking PIL 2010-07-30 22:52:47 -04:00
Matrix.c Forking PIL 2010-07-30 22:52:47 -04:00
ModeFilter.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
MspDecode.c Forking PIL 2010-07-30 22:52:47 -04:00
Negative.c Forking PIL 2010-07-30 22:52:47 -04:00
Offset.c Forking PIL 2010-07-30 22:52:47 -04:00
Pack.c Storage, packing and access for HSV format images 2014-07-22 16:09:22 -07:00
PackDecode.c Forking PIL 2010-07-30 22:52:47 -04:00
Palette.c Switching to strncpy, fixing potential buffer overflow in palette as well 2013-03-14 20:46:23 -07:00
Paste.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
PcdDecode.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
PcxDecode.c Move image to first xsize*bands bytes, rather than including padding if stride > xsize*bands, fixes #523 2014-02-15 22:41:02 -08:00
PcxEncode.c Use even stride when saving odd sized .pcx files 2014-03-03 23:05:50 -08:00
Point.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
Quant.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
QuantHash.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
QuantHash.h Make quantization code more portable 2013-04-08 00:52:15 +02:00
QuantHeap.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
QuantHeap.h Make quantization code more portable 2013-04-08 00:52:15 +02:00
QuantOctree.c fix FASTOCTREE quantizer for large images (>16MP) 2013-09-26 10:15:42 +02:00
QuantOctree.h Make quantization code more portable 2013-04-08 00:52:15 +02:00
QuantTypes.h BUG: add typedef uint64_t for msvc 2013-09-27 15:03:27 -07:00
RankFilter.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
Raw.h Forking PIL 2010-07-30 22:52:47 -04:00
RawDecode.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
RawEncode.c Forking PIL 2010-07-30 22:52:47 -04:00
Resample.c rename Image.ANTIALIAS to Image.LANCZOS 2014-11-28 01:41:56 +03:00
Storage.c Storage, packing and access for HSV format images 2014-07-22 16:09:22 -07:00
SunRleDecode.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
TgaRleDecode.c Forking PIL 2010-07-30 22:52:47 -04:00
TiffDecode.c Fix msvc build error 2014-09-21 16:48:35 -07:00
TiffDecode.h added ifd offset to the tiff decoder args, call TIFFSetSubDirectory 2014-09-02 15:20:25 -07:00
Unpack.c Special-case opaque pixels in RGBa unpacker 2015-01-24 01:13:58 -05:00
UnpackYCC.c Forking PIL 2010-07-30 22:52:47 -04:00
UnsharpMask.c sharp alpha channel 2014-11-22 01:58:31 +03:00
XbmDecode.c Forking PIL 2010-07-30 22:52:47 -04:00
XbmEncode.c Forking PIL 2010-07-30 22:52:47 -04:00
Zip.h Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
ZipDecode.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00
ZipEncode.c Cleanup WS, courtesy of @Arfrever 2013-06-30 18:42:19 -04:00