FreeImage: folders restructurization

git-svn-id: http://svn.miranda-ng.org/main/trunk@1884 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c

1 files changed, 189 insertions, 0 deletions

diff --git a/plugins/FreeImage/src/LibTIFF/tif_thunder.c b/plugins/FreeImage/src/LibTIFF/tif_thunder.c
new file mode 100644
index 0000000000..b8c6cc93cc
--- /dev/null
+++ b/plugins/FreeImage/src/LibTIFF/tif_thunder.c
@@ -0,0 +1,189 @@
+/* $Id: tif_thunder.c,v 1.37 2011/04/10 17:14:09 drolon Exp $ */

+

+/*

+ * Copyright (c) 1988-1997 Sam Leffler

+ * Copyright (c) 1991-1997 Silicon Graphics, Inc.

+ *

+ * Permission to use, copy, modify, distribute, and sell this software and 

+ * its documentation for any purpose is hereby granted without fee, provided

+ * that (i) the above copyright notices and this permission notice appear in

+ * all copies of the software and related documentation, and (ii) the names of

+ * Sam Leffler and Silicon Graphics may not be used in any advertising or

+ * publicity relating to the software without the specific, prior written

+ * permission of Sam Leffler and Silicon Graphics.

+ * 

+ * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 

+ * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY 

+ * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  

+ * 

+ * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR

+ * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,

+ * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,

+ * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF 

+ * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 

+ * OF THIS SOFTWARE.

+ */

+

+#include "tiffiop.h"

+#include <assert.h>

+#ifdef THUNDER_SUPPORT

+/*

+ * TIFF Library.

+ *

+ * ThunderScan 4-bit Compression Algorithm Support

+ */

+

+/*

+ * ThunderScan uses an encoding scheme designed for

+ * 4-bit pixel values.  Data is encoded in bytes, with

+ * each byte split into a 2-bit code word and a 6-bit

+ * data value.  The encoding gives raw data, runs of

+ * pixels, or pixel values encoded as a delta from the

+ * previous pixel value.  For the latter, either 2-bit

+ * or 3-bit delta values are used, with the deltas packed

+ * into a single byte.

+ */

+#define	THUNDER_DATA		0x3f	/* mask for 6-bit data */

+#define	THUNDER_CODE		0xc0	/* mask for 2-bit code word */

+/* code values */

+#define	THUNDER_RUN		0x00	/* run of pixels w/ encoded count */

+#define	THUNDER_2BITDELTAS	0x40	/* 3 pixels w/ encoded 2-bit deltas */

+#define	    DELTA2_SKIP		2	/* skip code for 2-bit deltas */

+#define	THUNDER_3BITDELTAS	0x80	/* 2 pixels w/ encoded 3-bit deltas */

+#define	    DELTA3_SKIP		4	/* skip code for 3-bit deltas */

+#define	THUNDER_RAW		0xc0	/* raw data encoded */

+

+static const int twobitdeltas[4] = { 0, 1, 0, -1 };

+static const int threebitdeltas[8] = { 0, 1, 2, 3, 0, -3, -2, -1 };

+

+#define	SETPIXEL(op, v) {                     \

+	lastpixel = (v) & 0xf;                \

+        if ( npixels < maxpixels )         \

+        {                                     \

+	  if (npixels++ & 1)                  \

+	    *op++ |= lastpixel;               \

+	  else                                \

+	    op[0] = (tidataval_t) (lastpixel << 4); \

+        }                                     \

+}

+

+static int

+ThunderSetupDecode(TIFF* tif)

+{

+	static const char module[] = "ThunderSetupDecode";

+

+        if ( tif->tif_dir.td_bitspersample != 4 )

+        {

+                TIFFErrorExt(tif->tif_clientdata, module,

+                             "Wrong bitspersample value (%d), Thunder decoder only supports 4bits per sample.",

+                             (int) tif->tif_dir.td_bitspersample );

+                return 0;

+        }

+        

+

+	return (1);

+}

+

+static int

+ThunderDecode(TIFF* tif, tidata_t op, tsize_t maxpixels)

+{

+	register unsigned char *bp;

+	register tsize_t cc;

+	unsigned int lastpixel;

+	tsize_t npixels;

+

+	bp = (unsigned char *)tif->tif_rawcp;

+	cc = tif->tif_rawcc;

+	lastpixel = 0;

+	npixels = 0;

+	while (cc > 0 && npixels < maxpixels) {

+		int n, delta;

+

+		n = *bp++, cc--;

+		switch (n & THUNDER_CODE) {

+		case THUNDER_RUN:		/* pixel run */

+			/*

+			 * Replicate the last pixel n times,

+			 * where n is the lower-order 6 bits.

+			 */

+			if (npixels & 1) {

+				op[0] |= lastpixel;

+				lastpixel = *op++; npixels++; n--;

+			} else

+				lastpixel |= lastpixel << 4;

+			npixels += n;

+			if (npixels < maxpixels) {

+				for (; n > 0; n -= 2)

+					*op++ = (tidataval_t) lastpixel;

+			}

+			if (n == -1)

+				*--op &= 0xf0;

+			lastpixel &= 0xf;

+			break;

+		case THUNDER_2BITDELTAS:	/* 2-bit deltas */

+			if ((delta = ((n >> 4) & 3)) != DELTA2_SKIP)

+				SETPIXEL(op, lastpixel + twobitdeltas[delta]);

+			if ((delta = ((n >> 2) & 3)) != DELTA2_SKIP)

+				SETPIXEL(op, lastpixel + twobitdeltas[delta]);

+			if ((delta = (n & 3)) != DELTA2_SKIP)

+				SETPIXEL(op, lastpixel + twobitdeltas[delta]);

+			break;

+		case THUNDER_3BITDELTAS:	/* 3-bit deltas */

+			if ((delta = ((n >> 3) & 7)) != DELTA3_SKIP)

+				SETPIXEL(op, lastpixel + threebitdeltas[delta]);

+			if ((delta = (n & 7)) != DELTA3_SKIP)

+				SETPIXEL(op, lastpixel + threebitdeltas[delta]);

+			break;

+		case THUNDER_RAW:		/* raw data */

+			SETPIXEL(op, n);

+			break;

+		}

+	}

+	tif->tif_rawcp = (tidata_t) bp;

+	tif->tif_rawcc = cc;

+	if (npixels != maxpixels) {

+		TIFFErrorExt(tif->tif_clientdata, tif->tif_name,

+		    "ThunderDecode: %s data at scanline %ld (%lu != %lu)",

+		    npixels < maxpixels ? "Not enough" : "Too much",

+		    (long) tif->tif_row, (long) npixels, (long) maxpixels);

+		return (0);

+	}

+	return (1);

+}

+

+static int

+ThunderDecodeRow(TIFF* tif, tidata_t buf, tsize_t occ, tsample_t s)

+{

+	tidata_t row = buf;

+	

+	(void) s;

+	while ((long)occ > 0) {

+		if (!ThunderDecode(tif, row, tif->tif_dir.td_imagewidth))

+			return (0);

+		occ -= tif->tif_scanlinesize;

+		row += tif->tif_scanlinesize;

+	}

+

+        return (1);

+}

+

+int

+TIFFInitThunderScan(TIFF* tif, int scheme)

+{

+	(void) scheme;

+	tif->tif_decoderow = ThunderDecodeRow;

+	tif->tif_decodestrip = ThunderDecodeRow;

+        tif->tif_setupdecode = ThunderSetupDecode;

+	return (1);

+}

+#endif /* THUNDER_SUPPORT */

+

+/* vim: set ts=8 sts=8 sw=8 noet: */

+/*

+ * Local Variables:

+ * mode: c

+ * c-basic-offset: 8

+ * fill-column: 78

+ * End:

+ */

+