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use RGBX rawmode for JPEG encoding as well

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This commit is contained in:
Alexander 2017-08-11 04:10:55 +03:00
parent 7725d281a5
commit 3aea175141
4 changed files with 17 additions and 1 deletions
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9
encode.c
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@ -691,6 +691,13 @@ PyImaging_JpegEncoderNew(PyObject* self, PyObject* args)
if (encoder == NULL)
return NULL;
// libjpeg-turbo supports different output formats.
// We are choosing Pillow's native format (3 color bytes + 1 padding)
// to avoid extra conversion in Pack.c.
if (ImagingJpegUseJCSExtensions() && strcmp(rawmode, "RGB") == 0) {
rawmode = "RGBX";
}
if (get_packer(encoder, mode, rawmode) < 0)
return NULL;
@ -719,6 +726,8 @@ PyImaging_JpegEncoderNew(PyObject* self, PyObject* args)
encoder->encode = ImagingJpegEncode;
strncpy(((JPEGENCODERSTATE*)encoder->state.context)->rawmode, rawmode, 8);
((JPEGENCODERSTATE*)encoder->state.context)->quality = quality;
((JPEGENCODERSTATE*)encoder->state.context)->qtables = qarrays;
((JPEGENCODERSTATE*)encoder->state.context)->qtablesLen = qtablesLen;

3
libImaging/Jpeg.h
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@ -88,6 +88,9 @@ typedef struct {
/* Chroma Subsampling (-1=default, 0=none, 1=medium, 2=high) */
int subsampling;
/* Converter input mode (input to the shuffler) */
char rawmode[8+1];
/* Custom quantization tables () */
unsigned int *qtables;

2
libImaging/JpegDecode.c
View File

@ -218,7 +218,7 @@ ImagingJpegDecode(Imaging im, ImagingCodecState state, UINT8* buf, int bytes)
context->cinfo.out_color_space = JCS_GRAYSCALE;
else if (strcmp(context->rawmode, "RGB") == 0)
context->cinfo.out_color_space = JCS_RGB;
#if defined(JCS_EXTENSIONS)
#ifdef JCS_EXTENSIONS
else if (strcmp(context->rawmode, "RGBX") == 0)
context->cinfo.out_color_space = JCS_EXT_RGBX;
#endif

4
libImaging/JpegEncode.c
View File

@ -135,6 +135,10 @@ ImagingJpegEncode(Imaging im, ImagingCodecState state, UINT8* buf, int bytes)
case 32:
context->cinfo.input_components = 4;
context->cinfo.in_color_space = JCS_CMYK;
#ifdef JCS_EXTENSIONS
if (strcmp(context->rawmode, "RGBX") == 0)
context->cinfo.in_color_space = JCS_EXT_RGBX;
#endif
break;
default:
state->errcode = IMAGING_CODEC_CONFIG;