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Added additional documentation for flags

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git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@139 632fc199-4ca6-4c93-a231-07263d6284db
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DRC
2010-02-22 08:35:19 +00:00
parent 0c6a271f97
commit 8f0d62cb92
1 changed files with 28 additions and 35 deletions
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63
turbojpeg.h
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@@ -27,15 +27,30 @@
enum {TJ_444=0, TJ_422, TJ_420, TJ_GRAYSCALE};
/* Flags */
#define TJ_BGR 1
#define TJ_BOTTOMUP 2
#define TJ_FORCEMMX 8 /* Force IPP to use MMX code even if SSE available */
#define TJ_FORCESSE 16 /* Force IPP to use SSE1 code even if SSE2 available */
#define TJ_FORCESSE2 32 /* Force IPP to use SSE2 code (useful if auto-detect is not working properly) */
#define TJ_ALPHAFIRST 64 /* BGR buffer is ABGR and RGB buffer is ARGB */
#define TJ_FORCESSE3 128 /* Force IPP to use SSE3 code (useful if auto-detect is not working properly) */
#define TJ_FASTUPSAMPLE 256 /* Use fast, inaccurate 4:2:2 and 4:2:0 YUV upsampling routines in libjpeg decompressor */
#define TJ_BGR 1
/* The components of each pixel in the source/destination bitmap are stored
in B,G,R order, not R,G,B */
#define TJ_BOTTOMUP 2
/* The source/destination bitmap is stored in bottom-up (Windows, OpenGL)
order, not top-down (X11) order */
#define TJ_FORCEMMX 8
/* Turn off CPU auto-detection and force TurboJPEG to use MMX code
(IPP and 32-bit libjpeg-turbo versions only) */
#define TJ_FORCESSE 16
/* Turn off CPU auto-detection and force TurboJPEG to use SSE code
(32-bit IPP and 32-bit libjpeg-turbo versions only) */
#define TJ_FORCESSE2 32
/* Turn off CPU auto-detection and force TurboJPEG to use SSE2 code
(32-bit IPP and 32-bit libjpeg-turbo versions only) */
#define TJ_ALPHAFIRST 64
/* If the source/destination bitmap is 32 bpp, assume that each pixel is
ARGB/XRGB (or ABGR/XBGR if TJ_BGR is also specified) */
#define TJ_FORCESSE3 128
/* Turn off CPU auto-detection and force TurboJPEG to use SSE3 code
(64-bit IPP version only) */
#define TJ_FASTUPSAMPLE 256
/* Use fast, inaccurate 4:2:2 and 4:2:0 YUV upsampling routines
(libjpeg version only) */
typedef void* tjhandle;
#define TJPAD(p) (((p)+3)&(~3))
@@ -103,20 +118,8 @@ DLLEXPORT tjhandle DLLCALL tjInitCompress(void);
TJ_GRAYSCALE: Generate grayscale JPEG image
[INPUT] jpegqual = JPEG quality (an integer between 0 and 100 inclusive.)
[INPUT] flags = the bitwise OR of one or more of the following
TJ_BGR: The components of each pixel in the source image are stored in
B,G,R order, not R,G,B
TJ_BOTTOMUP: The source image is stored in bottom-up (Windows) order,
not top-down
TJ_FORCEMMX: Valid only for the Intel Performance Primitives implementation
of this codec-- force IPP to use MMX code (bypass CPU auto-detection)
TJ_FORCESSE: Valid only for the Intel Performance Primitives implementation
of this codec-- force IPP to use SSE code (bypass CPU auto-detection)
TJ_FORCESSE2: Valid only for the Intel Performance Primitives implementation
of this codec-- force IPP to use SSE2 code (bypass CPU auto-detection)
TJ_FORCESSE3: Valid only for the Intel Performance Primitives implementation
of this codec-- force IPP to use SSE3 code (bypass CPU auto-detection)
[INPUT] flags = the bitwise OR of one or more of the flags described in the
"Flags" section above.
RETURNS: 0 on success, -1 on error
*/
@@ -185,18 +188,8 @@ DLLEXPORT int DLLCALL tjDecompressHeader(tjhandle j,
[INPUT] height = height (in pixels) of the destination image
[INPUT] pixelsize = size (in bytes) of each pixel in the destination image
RGBA/RGBx and BGRA/BGRx: 4, RGB and BGR: 3
[INPUT] flags = the bitwise OR of one or more of the following
TJ_BGR: The components of each pixel in the destination image should be
written in B,G,R order, not R,G,B
TJ_BOTTOMUP: The destination image should be stored in bottom-up
(Windows) order, not top-down
TJ_FORCEMMX: Valid only for the Intel Performance Primitives implementation
of this codec-- force IPP to use MMX code (bypass CPU auto-detection)
TJ_FORCESSE: Valid only for the Intel Performance Primitives implementation
of this codec-- force IPP to use SSE code (bypass CPU auto-detection)
TJ_FORCESSE2: Valid only for the Intel Performance Primitives implementation
of this codec-- force IPP to use SSE2 code (bypass CPU auto-detection)
[INPUT] flags = the bitwise OR of one or more of the flags described in the
"Flags" section above.
RETURNS: 0 on success, -1 on error
*/