Import libXfont's BDF-to-PCF code

bdftopcf is the only consumer of libXfont 1.x's read/write support, and
we'd like 1.x to go away entirely. Copy in the BDF read and PCF write
support so there's one fewer consumer of 1.x.

Signed-off-by: Adam Jackson <ajax@redhat.com>
Acked-by: Julien Cristau <jcristau@debian.org>

1 files changed, 183 insertions, 0 deletions

diff --git a/utilbitmap.c b/utilbitmap.c
new file mode 100644
index 0000000..1c5cf0d
--- /dev/null
+++ b/utilbitmap.c
@@ -0,0 +1,183 @@
+/*
+
+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
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <X11/fonts/fontmisc.h>
+
+/* Utility functions for reformating font bitmaps */
+
+static const 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(unsigned char *buf, int nbytes)
+{
+    const unsigned char *rev = _reverse_byte;
+
+    for (; --nbytes >= 0; buf++)
+	*buf = rev[*buf];
+}
+
+/*
+ *	Invert byte order within each 16-bits of an array.
+ */
+void
+TwoByteSwap(unsigned char *buf, int nbytes)
+{
+    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(unsigned char *buf, int nbytes)
+{
+    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 (char *pSrc, char *pDst,
+	     unsigned int srcPad, unsigned int dstPad,
+	     int width, int 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;
+}