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, 229 insertions, 0 deletions

diff --git a/bitmaputil.c b/bitmaputil.c
new file mode 100644
index 0000000..0a1c87e
--- /dev/null
+++ b/bitmaputil.c
@@ -0,0 +1,229 @@
+/*
+
+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.
+
+*/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <X11/fonts/fntfilst.h>
+#include <X11/fonts/bitmap.h>
+#include <X11/fonts/bdfint.h>
+
+#ifndef MAXSHORT
+#define MAXSHORT    32767
+#endif
+
+#ifndef MINSHORT
+#define MINSHORT    -32768
+#endif
+
+static xCharInfo initMinMetrics = {
+MAXSHORT, MAXSHORT, MAXSHORT, MAXSHORT, MAXSHORT, 0xFFFF};
+static xCharInfo initMaxMetrics = {
+MINSHORT, MINSHORT, MINSHORT, MINSHORT, MINSHORT, 0x0000};
+
+#define MINMAX(field,ci) \
+	if (minbounds->field > (ci)->field) \
+	     minbounds->field = (ci)->field; \
+	if (maxbounds->field < (ci)->field) \
+	     maxbounds->field = (ci)->field;
+
+#define COMPUTE_MINMAX(ci) \
+    if ((ci)->ascent || (ci)->descent || \
+	(ci)->leftSideBearing || (ci)->rightSideBearing || \
+	(ci)->characterWidth) \
+    { \
+	MINMAX(ascent, (ci)); \
+	MINMAX(descent, (ci)); \
+	MINMAX(leftSideBearing, (ci)); \
+	MINMAX(rightSideBearing, (ci)); \
+	MINMAX(characterWidth, (ci)); \
+    }
+
+void
+bitmapComputeFontBounds(FontPtr pFont)
+{
+    BitmapFontPtr  bitmapFont = (BitmapFontPtr) pFont->fontPrivate;
+    int         nchars;
+    int         r,
+                c;
+    CharInfoPtr ci;
+    int         maxOverlap;
+    int         overlap;
+    xCharInfo  *minbounds,
+               *maxbounds;
+    int         i;
+    int		numneg = 0, numpos = 0;
+
+    if (bitmapFont->bitmapExtra) {
+	minbounds = &bitmapFont->bitmapExtra->info.minbounds;
+	maxbounds = &bitmapFont->bitmapExtra->info.maxbounds;
+    } else {
+	minbounds = &pFont->info.minbounds;
+	maxbounds = &pFont->info.maxbounds;
+    }
+    *minbounds = initMinMetrics;
+    *maxbounds = initMaxMetrics;
+    maxOverlap = MINSHORT;
+    nchars = bitmapFont->num_chars;
+    for (i = 0, ci = bitmapFont->metrics; i < nchars; i++, ci++) {
+	COMPUTE_MINMAX(&ci->metrics);
+	if (ci->metrics.characterWidth < 0)
+	    numneg++;
+	else
+	    numpos++;
+	minbounds->attributes &= ci->metrics.attributes;
+	maxbounds->attributes |= ci->metrics.attributes;
+	overlap = ci->metrics.rightSideBearing - ci->metrics.characterWidth;
+	if (maxOverlap < overlap)
+	    maxOverlap = overlap;
+    }
+    if (bitmapFont->bitmapExtra) {
+	if (numneg > numpos)
+	    bitmapFont->bitmapExtra->info.drawDirection = RightToLeft;
+	else
+	    bitmapFont->bitmapExtra->info.drawDirection = LeftToRight;
+	bitmapFont->bitmapExtra->info.maxOverlap = maxOverlap;
+	minbounds = &pFont->info.minbounds;
+	maxbounds = &pFont->info.maxbounds;
+	*minbounds = initMinMetrics;
+	*maxbounds = initMaxMetrics;
+        i = 0;
+	maxOverlap = MINSHORT;
+	for (r = pFont->info.firstRow; r <= pFont->info.lastRow; r++) {
+	    for (c = pFont->info.firstCol; c <= pFont->info.lastCol; c++) {
+		ci = ACCESSENCODING(bitmapFont->encoding, i);
+		if (ci) {
+		    COMPUTE_MINMAX(&ci->metrics);
+		    if (ci->metrics.characterWidth < 0)
+			numneg++;
+		    else
+			numpos++;
+		    minbounds->attributes &= ci->metrics.attributes;
+		    maxbounds->attributes |= ci->metrics.attributes;
+		    overlap = ci->metrics.rightSideBearing -
+			ci->metrics.characterWidth;
+		    if (maxOverlap < overlap)
+			maxOverlap = overlap;
+		}
+                i++;
+	    }
+	}
+    }
+    if (numneg > numpos)
+	pFont->info.drawDirection = RightToLeft;
+    else
+	pFont->info.drawDirection = LeftToRight;
+    pFont->info.maxOverlap = maxOverlap;
+}
+
+void
+bitmapComputeFontInkBounds(FontPtr pFont)
+{
+    BitmapFontPtr  bitmapFont = (BitmapFontPtr) pFont->fontPrivate;
+    int         nchars;
+    int         r,
+                c;
+    CharInfoPtr cit;
+    xCharInfo  *ci;
+    int         offset;
+    xCharInfo  *minbounds,
+               *maxbounds;
+    int         i;
+
+    if (!bitmapFont->ink_metrics) {
+	if (bitmapFont->bitmapExtra) {
+	    bitmapFont->bitmapExtra->info.ink_minbounds = bitmapFont->bitmapExtra->info.minbounds;
+	    bitmapFont->bitmapExtra->info.ink_maxbounds = bitmapFont->bitmapExtra->info.maxbounds;
+	}
+	pFont->info.ink_minbounds = pFont->info.minbounds;
+	pFont->info.ink_maxbounds = pFont->info.maxbounds;
+    } else {
+	if (bitmapFont->bitmapExtra) {
+	    minbounds = &bitmapFont->bitmapExtra->info.ink_minbounds;
+	    maxbounds = &bitmapFont->bitmapExtra->info.ink_maxbounds;
+	} else {
+	    minbounds = &pFont->info.ink_minbounds;
+	    maxbounds = &pFont->info.ink_maxbounds;
+	}
+	*minbounds = initMinMetrics;
+	*maxbounds = initMaxMetrics;
+	nchars = bitmapFont->num_chars;
+	for (i = 0, ci = bitmapFont->ink_metrics; i < nchars; i++, ci++) {
+	    COMPUTE_MINMAX(ci);
+	    minbounds->attributes &= ci->attributes;
+	    maxbounds->attributes |= ci->attributes;
+	}
+	if (bitmapFont->bitmapExtra) {
+	    minbounds = &pFont->info.ink_minbounds;
+	    maxbounds = &pFont->info.ink_maxbounds;
+	    *minbounds = initMinMetrics;
+	    *maxbounds = initMaxMetrics;
+            i=0;
+	    for (r = pFont->info.firstRow; r <= pFont->info.lastRow; r++) {
+		for (c = pFont->info.firstCol; c <= pFont->info.lastCol; c++) {
+		    cit = ACCESSENCODING(bitmapFont->encoding, i);
+		    if (cit) {
+			offset = cit - bitmapFont->metrics;
+			ci = &bitmapFont->ink_metrics[offset];
+			COMPUTE_MINMAX(ci);
+			minbounds->attributes &= ci->attributes;
+			maxbounds->attributes |= ci->attributes;
+		    }
+                    i++;
+		}
+	    }
+	}
+    }
+}
+
+Bool
+bitmapAddInkMetrics(FontPtr pFont)
+{
+    BitmapFontPtr  bitmapFont;
+    int         i;
+
+    bitmapFont = (BitmapFontPtr) pFont->fontPrivate;
+    bitmapFont->ink_metrics = malloc(bitmapFont->num_chars * sizeof(xCharInfo));
+    if (!bitmapFont->ink_metrics) {
+      fprintf(stderr, "Error: Couldn't allocate ink_metrics (%d*%ld)\n",
+	      bitmapFont->num_chars, (unsigned long)sizeof(xCharInfo));
+	return FALSE;
+    }
+    for (i = 0; i < bitmapFont->num_chars; i++)
+	FontCharInkMetrics(pFont, &bitmapFont->metrics[i], &bitmapFont->ink_metrics[i]);
+    pFont->info.inkMetrics = TRUE;
+    return TRUE;
+}
+
+/* ARGSUSED */
+int
+bitmapComputeWeight(FontPtr pFont)
+{
+    return 10;
+}