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add runtime check for libjpeg_turbo_version

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Alexander 2017-08-11 00:22:01 +03:00
parent 84527c7591
commit e71f6217ad
1 changed files with 25 additions and 2 deletions
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27
decode.c
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@ -842,6 +842,17 @@ PyImaging_ZipDecoderNew(PyObject* self, PyObject* args)
#include "Jpeg.h"
#define STRINGIFY(x) #x
#define TOSTRING(x) STRINGIFY(x)
// There is no way to compare versions on compile time,
// so we have to do that in runtime.
#ifdef LIBJPEG_TURBO_VERSION
char *libjpeg_turbo_version = TOSTRING(LIBJPEG_TURBO_VERSION);
#else
char *libjpeg_turbo_version = NULL;
#endif
PyObject*
PyImaging_JpegDecoderNew(PyObject* self, PyObject* args)
{
@ -852,6 +863,8 @@ PyImaging_JpegDecoderNew(PyObject* self, PyObject* args)
char* jpegmode; /* what's in the file */
int scale = 1;
int draft = 0;
int use_jcs_extensions = 0;
if (!PyArg_ParseTuple(args, "ssz|ii", &mode, &rawmode, &jpegmode,
&scale, &draft))
return NULL;
@ -863,11 +876,21 @@ PyImaging_JpegDecoderNew(PyObject* self, PyObject* args)
if (decoder == NULL)
return NULL;
#if defined(JCS_EXTENSIONS)
#ifdef JCS_EXTENSIONS
#if defined(LIBJPEG_TURBO_VERSION_NUMBER)
#if LIBJPEG_TURBO_VERSION_NUMBER >= 1002010
printf("LIBJPEG_TURBO_VERSION_NUMBER\n");
use_jcs_extensions = 1;
#endif
#else
if (libjpeg_turbo_version) {
use_jcs_extensions = strcmp(libjpeg_turbo_version, "1.2.1") >= 0;
}
#endif
// libjpeg-turbo supports different output formats.
// We are choosing Pillow's native format (3 color bytes + 1 padding)
// to avoid extra conversion in Unpack.c.
if (strcmp(rawmode, "RGB") == 0) {
if (use_jcs_extensions && strcmp(rawmode, "RGB") == 0) {
rawmode = "RGBX";
}
#endif