Improve performance of non-SIMD color conversion routines and use global constants to define colorspace extension parameters


git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@698 632fc199-4ca6-4c93-a231-07263d6284db
diff --git a/jmorecfg.h b/jmorecfg.h
index c14a5f3..1448779 100644
--- a/jmorecfg.h
+++ b/jmorecfg.h
@@ -315,20 +315,54 @@
 
 #define JPEG_NUMCS 12
 
+#define EXT_RGB_RED        0
+#define EXT_RGB_GREEN      1
+#define EXT_RGB_BLUE       2
+#define EXT_RGB_PIXELSIZE  3
+
+#define EXT_RGBX_RED       0
+#define EXT_RGBX_GREEN     1
+#define EXT_RGBX_BLUE      2
+#define EXT_RGBX_PIXELSIZE 4
+
+#define EXT_BGR_RED        2
+#define EXT_BGR_GREEN      1
+#define EXT_BGR_BLUE       0
+#define EXT_BGR_PIXELSIZE  3
+
+#define EXT_BGRX_RED       2
+#define EXT_BGRX_GREEN     1
+#define EXT_BGRX_BLUE      0
+#define EXT_BGRX_PIXELSIZE 4
+
+#define EXT_XBGR_RED       3
+#define EXT_XBGR_GREEN     2
+#define EXT_XBGR_BLUE      1
+#define EXT_XBGR_PIXELSIZE 4
+
+#define EXT_XRGB_RED       1
+#define EXT_XRGB_GREEN     2
+#define EXT_XRGB_BLUE      3
+#define EXT_XRGB_PIXELSIZE 4
+
 static const int rgb_red[JPEG_NUMCS] = {
-	-1, -1, RGB_RED, -1, -1, -1, 0, 0, 2, 2, 3, 1
+  -1, -1, RGB_RED, -1, -1, -1, EXT_RGB_RED, EXT_RGBX_RED,
+  EXT_BGR_RED, EXT_BGRX_RED, EXT_XBGR_RED, EXT_XRGB_RED
 };
 
 static const int rgb_green[JPEG_NUMCS] = {
-	-1, -1, RGB_GREEN, -1, -1, -1, 1, 1, 1, 1, 2, 2
+  -1, -1, RGB_GREEN, -1, -1, -1, EXT_RGB_GREEN, EXT_RGBX_GREEN,
+  EXT_BGR_GREEN, EXT_BGRX_GREEN, EXT_XBGR_GREEN, EXT_XRGB_GREEN
 };
 
 static const int rgb_blue[JPEG_NUMCS] = {
-	-1, -1, RGB_BLUE, -1, -1, -1, 2, 2, 0, 0, 1, 3
+  -1, -1, RGB_BLUE, -1, -1, -1, EXT_RGB_BLUE, EXT_RGBX_BLUE,
+  EXT_BGR_BLUE, EXT_BGRX_BLUE, EXT_XBGR_BLUE, EXT_XRGB_BLUE
 };
 
 static const int rgb_pixelsize[JPEG_NUMCS] = {
-	-1, -1, RGB_PIXELSIZE, -1, -1, -1, 3, 4, 3, 4, 4, 4
+  -1, -1, RGB_PIXELSIZE, -1, -1, -1, EXT_RGB_PIXELSIZE, EXT_RGBX_PIXELSIZE,
+  EXT_BGR_PIXELSIZE, EXT_BGRX_PIXELSIZE, EXT_XBGR_PIXELSIZE, EXT_XRGB_PIXELSIZE
 };
 
 /* Definitions for speed-related optimizations. */