Include low-level unit tests borrowed from VirtualGL

git-svn-id: https://libjpeg-turbo.svn.sourceforge.net/svnroot/libjpeg-turbo@36 3789f03b-4d11-0410-bbf8-ca57d06f2519

1 files changed, 229 insertions, 0 deletions

diff --git a/trunk/turbojpeg.h b/trunk/turbojpeg.h
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+/* Copyright (C)2004 Landmark Graphics Corporation
+ * Copyright (C)2005, 2006 Sun Microsystems, Inc.
+ *
+ * This library is free software and may be redistributed and/or modified under
+ * the terms of the wxWindows Library License, Version 3.1 or (at your option)
+ * any later version.  The full license is in the LICENSE.txt file included
+ * with this distribution.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * wxWindows Library License for more details.
+ */
+
+#if (defined(_MSC_VER) || defined(__CYGWIN__) || defined(__MINGW32__)) && defined(_WIN32) && defined(DLLDEFINE)
+#define DLLEXPORT __declspec(dllexport)
+#else
+#define DLLEXPORT
+#endif
+
+#define DLLCALL
+
+/* Subsampling */
+#define NUMSUBOPT 4
+
+enum {TJ_444=0, TJ_422, TJ_411, 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) */
+
+typedef void* tjhandle;
+
+#define TJPAD(p) (((p)+3)&(~3))
+#ifndef max
+ #define max(a,b) ((a)>(b)?(a):(b))
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* API follows */
+
+
+/*
+  tjhandle tjInitCompress(void)
+
+  Creates a new JPEG compressor instance, allocates memory for the structures,
+  and returns a handle to the instance.  Most applications will only
+  need to call this once at the beginning of the program or once for each
+  concurrent thread.  Don't try to create a new instance every time you
+  compress an image, because this will cause performance to suffer.
+
+  RETURNS: NULL on error
+*/
+DLLEXPORT tjhandle DLLCALL tjInitCompress(void);
+
+
+/*
+  int tjCompress(tjhandle j,
+     unsigned char *srcbuf, int width, int pitch, int height, int pixelsize,
+     unsigned char *dstbuf, unsigned long *size,
+     int jpegsubsamp, int jpegqual, int flags)
+
+  [INPUT] j = instance handle previously returned from a call to
+     tjInitCompress()
+  [INPUT] srcbuf = pointer to user-allocated image buffer containing pixels in
+     RGB(A) or BGR(A) form
+  [INPUT] width =  width (in pixels) of the source image
+  [INPUT] pitch = bytes per line of the source image (width*pixelsize if the
+     bitmap is unpadded, else TJPAD(width*pixelsize) if each line of the bitmap
+     is padded to the nearest 32-bit boundary, such as is the case for Windows
+     bitmaps.  You can also be clever and use this parameter to skip lines, etc.,
+     as long as the pitch is greater than 0.)
+  [INPUT] height = height (in pixels) of the source image
+  [INPUT] pixelsize = size (in bytes) of each pixel in the source image
+     RGBA and BGRA: 4, RGB and BGR: 3
+  [INPUT] dstbuf = pointer to user-allocated image buffer which will receive
+     the JPEG image.  Use the macro TJBUFSIZE(width, height) to determine
+     the appropriate size for this buffer based on the image width and height.
+  [OUTPUT] size = pointer to unsigned long which receives the size (in bytes)
+     of the compressed image
+  [INPUT] jpegsubsamp = Specifies either 4:1:1, 4:2:2, or 4:4:4 subsampling.
+     When the image is converted from the RGB to YCbCr colorspace as part of the
+     JPEG compression process, every other Cb and Cr (chrominance) pixel can be
+     discarded to produce a smaller image with little perceptible loss of
+     image clarity (the human eye is more sensitive to small changes in
+     brightness than small changes in color.)
+
+     TJ_411: 4:1:1 subsampling.  Discards every other Cb, Cr pixel in both
+        horizontal and vertical directions.
+     TJ_422: 4:2:2 subsampling.  Discards every other Cb, Cr pixel only in
+        the horizontal direction.
+     TJ_444: no subsampling.
+     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)
+
+  RETURNS: 0 on success, -1 on error
+*/
+DLLEXPORT int DLLCALL tjCompress(tjhandle j,
+	unsigned char *srcbuf, int width, int pitch, int height, int pixelsize,
+	unsigned char *dstbuf, unsigned long *size,
+	int jpegsubsamp, int jpegqual, int flags);
+
+DLLEXPORT unsigned long DLLCALL TJBUFSIZE(int width, int height);
+
+/*
+  tjhandle tjInitDecompress(void)
+
+  Creates a new JPEG decompressor instance, allocates memory for the
+  structures, and returns a handle to the instance.  Most applications will
+  only need to call this once at the beginning of the program or once for each
+  concurrent thread.  Don't try to create a new instance every time you
+  decompress an image, because this will cause performance to suffer.
+
+  RETURNS: NULL on error
+*/
+DLLEXPORT tjhandle DLLCALL tjInitDecompress(void);
+
+
+/*
+  int tjDecompressHeader(tjhandle j,
+     unsigned char *srcbuf, unsigned long size,
+     int *width, int *height)
+
+  [INPUT] j = instance handle previously returned from a call to
+     tjInitDecompress()
+  [INPUT] srcbuf = pointer to a user-allocated buffer containing the JPEG image
+     to decompress
+  [INPUT] size = size of the JPEG image buffer (in bytes)
+  [OUTPUT] width = width (in pixels) of the JPEG image
+  [OUTPUT] height = height (in pixels) of the JPEG image
+
+  RETURNS: 0 on success, -1 on error
+*/
+DLLEXPORT int DLLCALL tjDecompressHeader(tjhandle j,
+	unsigned char *srcbuf, unsigned long size,
+	int *width, int *height);
+
+
+/*
+  int tjDecompress(tjhandle j,
+     unsigned char *srcbuf, unsigned long size,
+     unsigned char *dstbuf, int width, int pitch, int height, int pixelsize,
+     int flags)
+
+  [INPUT] j = instance handle previously returned from a call to
+     tjInitDecompress()
+  [INPUT] srcbuf = pointer to a user-allocated buffer containing the JPEG image
+     to decompress
+  [INPUT] size = size of the JPEG image buffer (in bytes)
+  [INPUT] dstbuf = pointer to user-allocated image buffer which will receive
+     the bitmap image.  This buffer should normally be pitch*height
+     bytes in size, although this pointer may also be used to decompress into
+     a specific region of a larger buffer.
+  [INPUT] width =  width (in pixels) of the destination image
+  [INPUT] pitch = bytes per line of the destination image (width*pixelsize if the
+     bitmap is unpadded, else TJPAD(width*pixelsize) if each line of the bitmap
+     is padded to the nearest 32-bit boundary, such as is the case for Windows
+     bitmaps.  You can also be clever and use this parameter to skip lines, etc.,
+     as long as the pitch is greater than 0.)
+  [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)
+
+  RETURNS: 0 on success, -1 on error
+*/
+DLLEXPORT int DLLCALL tjDecompress(tjhandle j,
+	unsigned char *srcbuf, unsigned long size,
+	unsigned char *dstbuf, int width, int pitch, int height, int pixelsize,
+	int flags);
+
+
+/*
+  int tjDestroy(tjhandle h)
+
+  Frees structures associated with a compression or decompression instance
+  
+  [INPUT] h = instance handle (returned from a previous call to
+     tjInitCompress() or tjInitDecompress()
+
+  RETURNS: 0 on success, -1 on error
+*/
+DLLEXPORT int DLLCALL tjDestroy(tjhandle h);
+
+
+/*
+  char *tjGetErrorStr(void)
+  
+  Returns a descriptive error message explaining why the last command failed
+*/
+DLLEXPORT char* DLLCALL tjGetErrorStr(void);
+
+#ifdef __cplusplus
+}
+#endif