Update libjpeg-turbo to 1.2.

jpeglib.h

 /*
  * jpeglib.h
  *
  * Copyright (C) 1991-1998, Thomas G. Lane.
  * Modified 2002-2009 by Guido Vollbeding.
- * Copyright (C) 2009-2010, D. R. Commander.
+ * Copyright (C) 2009-2011, D. R. Commander.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
  * This file defines the application interface for the JPEG library.
  * Most applications using the library need only include this file,
  * and perhaps jerror.h if they want to know the exact error codes.
  */
 
 #ifndef JPEGLIB_H
 #define JPEGLIB_H
@@ skipping 191 matching lines @@
   UINT8 marker;                 /* marker code: JPEG_COM, or JPEG_APP0+n */
   unsigned int original_length; /* # bytes of data in the file */
   unsigned int data_length;     /* # bytes of data saved at data[] */
   JOCTET FAR * data;            /* the data contained in the marker */
   /* the marker length word is not counted in data_length or original_length */
 };
 
 /* Known color spaces. */
 
 #define JCS_EXTENSIONS 1
+#define JCS_ALPHA_EXTENSIONS 1
 
 typedef enum {
         JCS_UNKNOWN,            /* error/unspecified */
         JCS_GRAYSCALE,          /* monochrome */
         JCS_RGB,                /* red/green/blue as specified by the RGB_RED, RGB_GREEN,
-                 RGB_BLUE, and RGB_PIXELSIZE macros */
+                                   RGB_BLUE, and RGB_PIXELSIZE macros */
         JCS_YCbCr,              /* Y/Cb/Cr (also known as YUV) */
         JCS_CMYK,               /* C/M/Y/K */
         JCS_YCCK,               /* Y/Cb/Cr/K */
         JCS_EXT_RGB,            /* red/green/blue */
         JCS_EXT_RGBX,           /* red/green/blue/x */
         JCS_EXT_BGR,            /* blue/green/red */
         JCS_EXT_BGRX,           /* blue/green/red/x */
         JCS_EXT_XBGR,           /* x/blue/green/red */
-        JCS_EXT_XRGB            /* x/red/green/blue */
+        JCS_EXT_XRGB,           /* x/red/green/blue */
+        /* When out_color_space it set to JCS_EXT_RGBX, JCS_EXT_BGRX,
+           JCS_EXT_XBGR, or JCS_EXT_XRGB during decompression, the X byte is
+           undefined, and in order to ensure the best performance,
+           libjpeg-turbo can set that byte to whatever value it wishes.  Use
+           the following colorspace constants to ensure that the X byte is set
+           to 0xFF, so that it can be interpreted as an opaque alpha
+           channel. */
+        JCS_EXT_RGBA,           /* red/green/blue/alpha */
+        JCS_EXT_BGRA,           /* blue/green/red/alpha */
+        JCS_EXT_ABGR,           /* alpha/blue/green/red */
+        JCS_EXT_ARGB            /* alpha/red/green/blue */
 } J_COLOR_SPACE;
 
 /* DCT/IDCT algorithm options. */
 
 typedef enum {
         JDCT_ISLOW,             /* slow but accurate integer algorithm */
         JDCT_IFAST,             /* faster, less accurate integer method */
         JDCT_FLOAT              /* floating-point: accurate, fast on fast HW */
 } J_DCT_METHOD;
 
@@ skipping 953 matching lines @@
 #include "jerror.h"             /* fetch error codes too */
 #endif
 
 #ifdef __cplusplus
 #ifndef DONT_USE_EXTERN_C
 }
 #endif
 #endif
 
 #endif /* JPEGLIB_H */