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+/* $Xorg: spfont.c,v 1.4 2001/02/09 02:04:00 xorgcvs Exp $ */
+/*
+ * Copyright 1990, 1991 Network Computing Devices;
+ * Portions Copyright 1987 by Digital Equipment Corporation
+ *
+ * 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, and that the names of Network Computing Devices or Digital
+ * not be used in advertising or publicity pertaining to distribution of
+ * the software without specific, written prior permission.
+ *
+ * NETWORK COMPUTING DEVICES AND DIGITAL DISCLAIM ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL NETWORK COMPUTING DEVICES OR DIGITAL BE
+ * LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Author: Dave Lemke, Network Computing Devices Inc
+ */
+/* $XFree86: xc/lib/font/Speedo/spfont.c,v 3.12tsi Exp $ */
+
+/*
+
+Copyright 1987, 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.
+
+*/
+
+/*
+ * Speedo font loading
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <X11/fonts/FSproto.h>
+#include "spint.h"
+#include <X11/fonts/fontutil.h>
+#ifndef FONTMODULE
+#ifdef _XOPEN_SOURCE
+#include <math.h>
+#else
+#define _XOPEN_SOURCE /* to get prototype for hypot on some systems */
+#include <math.h>
+#undef _XOPEN_SOURCE
+#endif
+#else
+#include "servermd.h"
+#include "xf86_ansic.h"
+#endif
+
+#ifndef M_PI
+#define M_PI 3.14159
+#endif /* M_PI */
+#ifndef DEFAULT_BIT_ORDER
+
+#ifdef BITMAP_BIT_ORDER
+#define DEFAULT_BIT_ORDER BITMAP_BIT_ORDER
+#else
+#define DEFAULT_BIT_ORDER UNKNOWN_BIT_ORDER
+#endif
+
+#endif
+
+static void SpeedoCloseFont(FontPtr pfont);
+
+static int
+sp_get_glyphs(
+ FontPtr pFont,
+ unsigned long count,
+ register unsigned char *chars,
+ FontEncoding charEncoding,
+ unsigned long *glyphCount, /* RETURN */
+ CharInfoPtr *glyphs) /* RETURN */
+{
+ SpeedoFontPtr spf;
+ unsigned int firstCol;
+ register unsigned int numCols;
+ unsigned int firstRow;
+ unsigned int numRows;
+ CharInfoPtr *glyphsBase;
+ register unsigned int c;
+ register CharInfoPtr pci;
+ unsigned int r;
+ CharInfoPtr encoding;
+ CharInfoPtr pDefault;
+#ifdef notyet
+ int itemSize;
+#endif
+ int err = Successful;
+
+ spf = (SpeedoFontPtr) pFont->fontPrivate;
+ encoding = spf->encoding;
+ pDefault = spf->pDefault;
+ firstCol = pFont->info.firstCol;
+ numCols = pFont->info.lastCol - firstCol + 1;
+ glyphsBase = glyphs;
+
+
+ /* XXX - this should be much smarter */
+ /* make sure the glyphs are there */
+#ifdef notyet
+ if (charEncoding == Linear8Bit || charEncoding == TwoD8Bit)
+ itemSize = 1;
+ else
+ itemSize = 2;
+
+ if (!fsd->complete)
+ err = fs_load_glyphs(NULL, pFont, count, itemSize, chars);
+#endif
+
+ if (err != Successful)
+ return err;
+
+ switch (charEncoding) {
+
+ case Linear8Bit:
+ case TwoD8Bit:
+ if (pFont->info.firstRow > 0)
+ break;
+ if (pFont->info.allExist && pDefault) {
+ while (count--) {
+ c = (*chars++) - firstCol;
+ if (c < numCols)
+ *glyphs++ = &encoding[c];
+ else
+ *glyphs++ = pDefault;
+ }
+ } else {
+ while (count--) {
+ c = (*chars++) - firstCol;
+ if (c < numCols && (pci = &encoding[c])->bits)
+ *glyphs++ = pci;
+ else if (pDefault)
+ *glyphs++ = pDefault;
+ }
+ }
+ break;
+ case Linear16Bit:
+ if (pFont->info.allExist && pDefault) {
+ while (count--) {
+ c = *chars++ << 8;
+ c = (c | *chars++) - firstCol;
+ if (c < numCols)
+ *glyphs++ = &encoding[c];
+ else
+ *glyphs++ = pDefault;
+ }
+ } else {
+ while (count--) {
+ c = *chars++ << 8;
+ c = (c | *chars++) - firstCol;
+ if (c < numCols && (pci = &encoding[c])->bits)
+ *glyphs++ = pci;
+ else if (pDefault)
+ *glyphs++ = pDefault;
+ }
+ }
+ break;
+
+ case TwoD16Bit:
+ firstRow = pFont->info.firstRow;
+ numRows = pFont->info.lastRow - firstRow + 1;
+ while (count--) {
+ r = (*chars++) - firstRow;
+ c = (*chars++) - firstCol;
+ if (r < numRows && c < numCols &&
+ (pci = &encoding[r * numCols + c])->bits)
+ *glyphs++ = pci;
+ else if (pDefault)
+ *glyphs++ = pDefault;
+ }
+ break;
+ }
+ *glyphCount = glyphs - glyphsBase;
+ return Successful;
+}
+
+static CharInfoRec nonExistantChar;
+
+static int
+sp_get_metrics(
+ FontPtr pFont,
+ unsigned long count,
+ register unsigned char *chars,
+ FontEncoding charEncoding,
+ unsigned long *glyphCount, /* RETURN */
+ xCharInfo **glyphs) /* RETURN */
+{
+ int ret;
+ SpeedoFontPtr spf;
+ CharInfoPtr oldDefault;
+
+ spf = (SpeedoFontPtr) pFont->fontPrivate;
+ oldDefault = spf->pDefault;
+ spf->pDefault = &nonExistantChar;
+ ret = sp_get_glyphs(pFont, count, chars, charEncoding,
+ glyphCount, (CharInfoPtr *) glyphs);
+
+ spf->pDefault = oldDefault;
+ return ret;
+}
+
+int
+sp_open_font(
+ char *fontname,
+ char *filename,
+ FontEntryPtr entry,
+ FontScalablePtr vals,
+ fsBitmapFormat format,
+ fsBitmapFormatMask fmask,
+ Mask flags,
+ SpeedoFontPtr *spfont)
+{
+ SpeedoFontPtr spf;
+ SpeedoMasterFontPtr spmf;
+ int ret;
+ specs_t specs;
+ int xx8, xy8, yx8, yy8;
+
+ /* find a master (create it if necessary) */
+ spmf = (SpeedoMasterFontPtr) entry->u.scalable.extra->private;
+ if (!spmf)
+ {
+ ret = sp_open_master(fontname, filename, &spmf);
+ if (ret != Successful)
+ return ret;
+ entry->u.scalable.extra->private = (pointer) spmf;
+ spmf->entry = entry;
+ }
+
+ spf = (SpeedoFontPtr) xalloc(sizeof(SpeedoFontRec));
+ if (!spf)
+ return AllocError;
+ bzero((char *) spf, sizeof(SpeedoFontRec));
+
+ *spfont = spf;
+
+ /* clobber everything -- this may be leaking, but other wise evil
+ * stuff is left behind -- succesive transformed fonts get mangled */
+ bzero((char *)&sp_globals, sizeof(sp_globals));
+
+ spf->master = spmf;
+ spf->entry = entry;
+ spmf->refcount++;
+ sp_reset_master(spmf);
+ /* now we've done enough that if we bail out we must call sp_close_font */
+
+ spf->vals = *vals;
+
+ /* set up specs */
+
+ specs.pfont = &spmf->font;
+
+ specs.xxmult = (int)(vals->pixel_matrix[0] * (double)(1L << 16));
+ specs.xymult = (int)(vals->pixel_matrix[2] * (double)(1L << 16));
+ specs.yxmult = (int)(vals->pixel_matrix[1] * (double)(1L << 16));
+ specs.yymult = (int)(vals->pixel_matrix[3] * (double)(1L << 16));
+
+ specs.xoffset = 0L << 16; /* XXX tweak? */
+ specs.yoffset = 0L << 16; /* XXX tweak? */
+
+ specs.flags = MODE_SCREEN;
+ specs.out_info = NULL;
+
+ /* When Speedo tries to generate a very small font bitmap, it
+ often crashes or goes into an infinite loop.
+ Don't know why this is so, but until we can fix it properly,
+ return BadFontName for anything smaller than 4 pixels.
+ */
+#define TINY_FACTOR (16 << 16)
+ xx8 = specs.xxmult >> 8;
+ xy8 = specs.xymult >> 8;
+ yx8 = specs.yxmult >> 8;
+ yy8 = specs.yymult >> 8;
+ if (xx8 * xx8 + xy8 * xy8 < TINY_FACTOR ||
+ yx8 * yx8 + yy8 * yy8 < TINY_FACTOR)
+ {
+ sp_close_font(spf);
+ return BadFontName;
+ }
+
+ /* clobber global state to avoid wrecking future transformed fonts */
+ bzero ((char *) &sp_globals, sizeof(sp_globals));
+
+ if (!sp_set_specs(&specs))
+ {
+ sp_close_font(spf);
+ return BadFontName;
+ }
+
+ spf->specs = specs;
+ spf->master = spmf;
+
+ *spfont = spf;
+ return Successful;
+}
+
+static int
+sp_load_font(
+ char *fontname,
+ char *filename,
+ FontEntryPtr entry,
+ FontScalablePtr vals,
+ fsBitmapFormat format,
+ fsBitmapFormatMask fmask,
+ FontPtr pfont,
+ Mask flags)
+{
+ SpeedoFontPtr spf;
+ SpeedoMasterFontPtr spmf;
+ int esize;
+ int ret;
+ long sWidth;
+
+ ret = sp_open_font(fontname, filename, entry, vals, format, fmask,
+ flags, &spf);
+
+ if (ret != Successful)
+ return ret;
+
+ spmf = spf->master;
+ sp_reset_master(spmf);
+ esize = sizeof(CharInfoRec) * (spmf->max_id - spmf->first_char_id + 1);
+
+ spf->encoding = (CharInfoPtr) xalloc(esize);
+ if (!spf->encoding) {
+ sp_close_font(spf);
+ return AllocError;
+ }
+ bzero((char *) spf->encoding, esize);
+
+ sp_fp_cur = spf;
+
+ sp_make_header(spf, &pfont->info);
+
+ sp_compute_bounds(spf, &pfont->info, SaveMetrics, &sWidth);
+
+ sp_compute_props(spf, fontname, &pfont->info, sWidth);
+
+ pfont->fontPrivate = (pointer) spf;
+
+/* XXX */
+ flags |= FontLoadBitmaps;
+
+ if (flags & FontLoadBitmaps) {
+ sp_fp_cur = spf;
+ ret = sp_build_all_bitmaps(pfont, format, fmask);
+ }
+ if (ret != Successful)
+ return ret;
+
+ /* compute remaining accelerators */
+ FontComputeInfoAccelerators(&pfont->info);
+
+ pfont->format = format;
+
+ pfont->get_metrics = sp_get_metrics;
+ pfont->get_glyphs = sp_get_glyphs;
+ pfont->unload_font = SpeedoCloseFont;
+ pfont->unload_glyphs = NULL;
+ pfont->refcnt = 0;
+
+ /* have to hold on to master for min/max id */
+ sp_close_master_file(spmf);
+
+ return ret;
+}
+
+int
+SpeedoFontLoad(
+ FontPtr *ppfont,
+ char *fontname,
+ char *filename,
+ FontEntryPtr entry,
+ FontScalablePtr vals,
+ fsBitmapFormat format,
+ fsBitmapFormatMask fmask,
+ Mask flags)
+{
+ FontPtr pfont;
+ int ret;
+
+ /* Reject ridiculously small sizes that will blow up the math */
+ if (hypot(vals->pixel_matrix[0], vals->pixel_matrix[1]) < 1.0 ||
+ hypot(vals->pixel_matrix[2], vals->pixel_matrix[3]) < 1.0)
+ return BadFontName;
+
+ if (!(pfont = CreateFontRec()))
+ return AllocError;
+
+ ret = sp_load_font(fontname, filename, entry, vals, format, fmask,
+ pfont, flags);
+
+ if (ret == Successful)
+ *ppfont = pfont;
+ else
+ DestroyFontRec (pfont);
+
+ return ret;
+}
+
+void
+sp_close_font(SpeedoFontPtr spf)
+{
+ SpeedoMasterFontPtr spmf;
+
+ spmf = spf->master;
+ --spmf->refcount;
+ if (spmf->refcount == 0)
+ sp_close_master_font (spmf);
+ xfree(spf->encoding);
+ xfree(spf->bitmaps);
+ xfree(spf);
+}
+
+static void
+SpeedoCloseFont(FontPtr pfont)
+{
+ SpeedoFontPtr spf;
+
+ spf = (SpeedoFontPtr) pfont->fontPrivate;
+ sp_close_font(spf);
+ xfree(pfont->info.isStringProp);
+ xfree(pfont->info.props);
+ DestroyFontRec(pfont);
+
+}
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