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authorKaleb Keithley <kaleb@freedesktop.org>2003-11-14 15:54:40 +0000
committerKaleb Keithley <kaleb@freedesktop.org>2003-11-14 15:54:40 +0000
commit153e8da44452905ae04a0e20ad0d85f40399b4ca (patch)
treeb4e614de58d4b596dab3dcc7fd4054ec96db592a /src/util/utilbitmap.c
R6.6 is the Xorg base-lineXORG-MAIN
Diffstat (limited to 'src/util/utilbitmap.c')
-rw-r--r--src/util/utilbitmap.c187
1 files changed, 187 insertions, 0 deletions
diff --git a/src/util/utilbitmap.c b/src/util/utilbitmap.c
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+/* $Xorg: utilbitmap.c,v 1.4 2001/02/09 02:04:04 xorgcvs Exp $ */
+
+/*
+
+Copyright 1990, 1994, 1998 The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+*/
+
+/*
+ * Author: Keith Packard, MIT X Consortium
+ */
+
+/* Utility functions for reformating font bitmaps */
+
+static unsigned char _reverse_byte[0x100] = {
+ 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
+ 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
+ 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
+ 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
+ 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
+ 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
+ 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
+ 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
+ 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
+ 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
+ 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
+ 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
+ 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
+ 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
+ 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
+ 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
+ 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
+ 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
+ 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
+ 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
+ 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
+ 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
+ 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
+ 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
+ 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
+ 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
+ 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
+ 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
+ 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
+ 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
+ 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
+ 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
+};
+
+/*
+ * Invert bit order within each BYTE of an array.
+ */
+void
+BitOrderInvert(buf, nbytes)
+ register unsigned char *buf;
+ register int nbytes;
+{
+ register unsigned char *rev = _reverse_byte;
+
+ for (; --nbytes >= 0; buf++)
+ *buf = rev[*buf];
+}
+
+/*
+ * Invert byte order within each 16-bits of an array.
+ */
+void
+TwoByteSwap(buf, nbytes)
+ register unsigned char *buf;
+ register int nbytes;
+{
+ register unsigned char c;
+
+ for (; nbytes > 0; nbytes -= 2, buf += 2)
+ {
+ c = buf[0];
+ buf[0] = buf[1];
+ buf[1] = c;
+ }
+}
+
+/*
+ * Invert byte order within each 32-bits of an array.
+ */
+void
+FourByteSwap(buf, nbytes)
+ register unsigned char *buf;
+ register int nbytes;
+{
+ register unsigned char c;
+
+ for (; nbytes > 0; nbytes -= 4, buf += 4)
+ {
+ c = buf[0];
+ buf[0] = buf[3];
+ buf[3] = c;
+ c = buf[1];
+ buf[1] = buf[2];
+ buf[2] = c;
+ }
+}
+
+/*
+ * Repad a bitmap
+ */
+
+int
+RepadBitmap (pSrc, pDst, srcPad, dstPad, width, height)
+ char *pSrc, *pDst;
+ unsigned srcPad, dstPad;
+ int width, height;
+{
+ int srcWidthBytes,dstWidthBytes;
+ int row,col;
+ char *pTmpSrc,*pTmpDst;
+
+ switch (srcPad) {
+ case 1:
+ srcWidthBytes = (width+7)>>3;
+ break;
+ case 2:
+ srcWidthBytes = ((width+15)>>4)<<1;
+ break;
+ case 4:
+ srcWidthBytes = ((width+31)>>5)<<2;
+ break;
+ case 8:
+ srcWidthBytes = ((width+63)>>6)<<3;
+ break;
+ default:
+ return 0;
+ }
+ switch (dstPad) {
+ case 1:
+ dstWidthBytes = (width+7)>>3;
+ break;
+ case 2:
+ dstWidthBytes = ((width+15)>>4)<<1;
+ break;
+ case 4:
+ dstWidthBytes = ((width+31)>>5)<<2;
+ break;
+ case 8:
+ dstWidthBytes = ((width+63)>>6)<<3;
+ break;
+ default:
+ return 0;
+ }
+
+ width = srcWidthBytes;
+ if (width > dstWidthBytes)
+ width = dstWidthBytes;
+ pTmpSrc= pSrc;
+ pTmpDst= pDst;
+ for (row = 0; row < height; row++)
+ {
+ for (col = 0; col < width; col++)
+ *pTmpDst++ = *pTmpSrc++;
+ while (col < dstWidthBytes)
+ {
+ *pTmpDst++ = '\0';
+ col++;
+ }
+ pTmpSrc += srcWidthBytes - width;
+ }
+ return dstWidthBytes * height;
+}