summaryrefslogtreecommitdiff
path: root/backend/dvi/mdvi-lib/dviread.c
diff options
context:
space:
mode:
Diffstat (limited to 'backend/dvi/mdvi-lib/dviread.c')
-rw-r--r--backend/dvi/mdvi-lib/dviread.c1585
1 files changed, 1585 insertions, 0 deletions
diff --git a/backend/dvi/mdvi-lib/dviread.c b/backend/dvi/mdvi-lib/dviread.c
new file mode 100644
index 00000000..97b7b844
--- /dev/null
+++ b/backend/dvi/mdvi-lib/dviread.c
@@ -0,0 +1,1585 @@
+/*
+ * Copyright (C) 2000, Matias Atria
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <math.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#include "mdvi.h"
+#include "private.h"
+#include "color.h"
+
+typedef int (*DviCommand) __PROTO((DviContext *, int));
+
+#define DVICMDDEF(x) static int x __PROTO((DviContext *, int))
+
+DVICMDDEF(set_char);
+DVICMDDEF(set_rule);
+DVICMDDEF(no_op);
+DVICMDDEF(push);
+DVICMDDEF(pop);
+DVICMDDEF(move_right);
+DVICMDDEF(move_down);
+DVICMDDEF(move_w);
+DVICMDDEF(move_x);
+DVICMDDEF(move_y);
+DVICMDDEF(move_z);
+DVICMDDEF(sel_font);
+DVICMDDEF(sel_fontn);
+DVICMDDEF(special);
+DVICMDDEF(def_font);
+DVICMDDEF(undefined);
+DVICMDDEF(unexpected);
+
+static const DviCommand dvi_commands[] = {
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char,
+ set_char, set_char, set_char, set_char, /* 0 - 127 */
+ set_char, set_char, set_char, set_char, /* 128 - 131 */
+ set_rule, /* 132 */
+ set_char, set_char, set_char, set_char, /* 133 - 136 */
+ set_rule, /* 137 */
+ no_op, /* 138 */
+ unexpected, /* 139 (BOP) */
+ unexpected, /* 140 (EOP) */
+ push, /* 141 */
+ pop, /* 142 */
+ move_right, move_right, move_right, move_right, /* 143 - 146 */
+ move_w, move_w, move_w, move_w, move_w, /* 147 - 151 */
+ move_x, move_x, move_x, move_x, move_x, /* 152 - 156 */
+ move_down, move_down, move_down, move_down, /* 157 - 160 */
+ move_y, move_y, move_y, move_y, move_y, /* 161 - 165 */
+ move_z, move_z, move_z, move_z, move_z, /* 166 - 170 */
+ sel_font, sel_font, sel_font, sel_font,
+ sel_font, sel_font, sel_font, sel_font,
+ sel_font, sel_font, sel_font, sel_font,
+ sel_font, sel_font, sel_font, sel_font,
+ sel_font, sel_font, sel_font, sel_font,
+ sel_font, sel_font, sel_font, sel_font,
+ sel_font, sel_font, sel_font, sel_font,
+ sel_font, sel_font, sel_font, sel_font,
+ sel_font, sel_font, sel_font, sel_font,
+ sel_font, sel_font, sel_font, sel_font,
+ sel_font, sel_font, sel_font, sel_font,
+ sel_font, sel_font, sel_font, sel_font,
+ sel_font, sel_font, sel_font, sel_font,
+ sel_font, sel_font, sel_font, sel_font,
+ sel_font, sel_font, sel_font, sel_font,
+ sel_font, sel_font, sel_font, sel_font, /* 171 - 234 */
+ sel_fontn, sel_fontn, sel_fontn, sel_fontn, /* 235 - 238 */
+ special, special, special, special, /* 239 - 242 */
+ def_font, def_font, def_font, def_font, /* 243 - 246 */
+ unexpected, /* 247 (PRE) */
+ unexpected, /* 248 (POST) */
+ unexpected, /* 249 (POST_POST) */
+ undefined, undefined, undefined,
+ undefined, undefined, undefined /* 250 - 255 */
+};
+
+#define DVI_BUFLEN 4096
+
+static int mdvi_run_macro(DviContext *dvi, Uchar *macro, size_t len);
+
+static void dummy_draw_glyph(DviContext *dvi, DviFontChar *ch, int x, int y)
+{
+}
+
+static void dummy_draw_rule(DviContext *dvi, int x, int y, Uint w, Uint h, int f)
+{
+}
+
+static int dummy_alloc_colors(void *a, Ulong *b, int c, Ulong d, Ulong e, double f, int g)
+{
+ return -1;
+}
+
+static void *dummy_create_image(void *a, Uint b, Uint c, Uint d)
+{
+ return NULL;
+}
+
+static void dummy_free_image(void *a)
+{
+}
+
+static void dummy_dev_destroy(void *a)
+{
+}
+
+static void dummy_dev_putpixel(void *a, int x, int y, Ulong c)
+{
+}
+
+static void dummy_dev_refresh(DviContext *a, void *b)
+{
+}
+
+static void dummy_dev_set_color(void *a, Ulong b, Ulong c)
+{
+}
+
+/* functions to report errors */
+static void dvierr(DviContext *dvi, const char *format, ...)
+{
+ va_list ap;
+
+ va_start(ap, format);
+ fprintf(stderr, "%s[%d]: Error: ",
+ dvi->filename, dvi->currpage);
+ vfprintf(stderr, format, ap);
+ va_end(ap);
+}
+
+static void dviwarn(DviContext *dvi, const char *format, ...)
+{
+ va_list ap;
+
+ fprintf(stderr, "%s[%d]: Warning: ",
+ dvi->filename, dvi->currpage);
+ va_start(ap, format);
+ vfprintf(stderr, format, ap);
+ va_end(ap);
+}
+
+#define NEEDBYTES(d,n) \
+ ((d)->buffer.pos + (n) > (d)->buffer.length)
+
+static int get_bytes(DviContext *dvi, size_t n)
+{
+ /*
+ * caller wants to read `n' bytes from dvi->buffer + dvi->pos.
+ * Make sure there is enough data to satisfy the request
+ */
+ if(NEEDBYTES(dvi, n)) {
+ size_t required;
+ int newlen;
+
+ if(dvi->buffer.frozen || dvi->in == NULL || feof(dvi->in)) {
+ /* this is EOF */
+ dviwarn(dvi, _("unexpected EOF\n"));
+ return -1;
+ }
+ /* get more data */
+ if(dvi->buffer.data == NULL) {
+ /* first allocation */
+ dvi->buffer.size = Max(DVI_BUFLEN, n);
+ dvi->buffer.data = (Uchar *)mdvi_malloc(dvi->buffer.size);
+ dvi->buffer.length = 0;
+ dvi->buffer.frozen = 0;
+ } else if(dvi->buffer.pos < dvi->buffer.length) {
+ /* move whatever we want to keep */
+ dvi->buffer.length -= dvi->buffer.pos;
+ memmove(dvi->buffer.data,
+ dvi->buffer.data + dvi->buffer.pos,
+ dvi->buffer.length);
+ } else {
+ /* we can discard all the data in this buffer */
+ dvi->buffer.length = 0;
+ }
+
+ required = n - dvi->buffer.length;
+ if(required > dvi->buffer.size - dvi->buffer.length) {
+ /* need to allocate more memory */
+ dvi->buffer.size = dvi->buffer.length + required + 128;
+ dvi->buffer.data = (Uchar *)xresize(dvi->buffer.data,
+ char, dvi->buffer.size);
+ }
+ /* now read into the buffer */
+ newlen = fread(dvi->buffer.data + dvi->buffer.length,
+ 1, dvi->buffer.size - dvi->buffer.length, dvi->in);
+ if(newlen == -1) {
+ mdvi_error("%s: %s\n", dvi->filename, strerror(errno));
+ return -1;
+ }
+ dvi->buffer.length += newlen;
+ dvi->buffer.pos = 0;
+ }
+ return 0;
+}
+
+/* only relative forward seeks are supported by this function */
+static int dskip(DviContext *dvi, long offset)
+{
+ ASSERT(offset > 0);
+
+ if(NEEDBYTES(dvi, offset) && get_bytes(dvi, offset) == -1)
+ return -1;
+ dvi->buffer.pos += offset;
+ return 0;
+}
+
+/* DVI I/O functions (note: here `n' must be <= 4) */
+static long dsgetn(DviContext *dvi, size_t n)
+{
+ long val;
+
+ if(NEEDBYTES(dvi, n) && get_bytes(dvi, n) == -1)
+ return -1;
+ val = msgetn(dvi->buffer.data + dvi->buffer.pos, n);
+ dvi->buffer.pos += n;
+ return val;
+}
+
+static int dread(DviContext *dvi, char *buffer, size_t len)
+{
+ if(NEEDBYTES(dvi, len) && get_bytes(dvi, len) == -1)
+ return -1;
+ memcpy(buffer, dvi->buffer.data + dvi->buffer.pos, len);
+ dvi->buffer.pos += len;
+ return 0;
+}
+
+static long dugetn(DviContext *dvi, size_t n)
+{
+ long val;
+
+ if(NEEDBYTES(dvi, n) && get_bytes(dvi, n) == -1)
+ return -1;
+ val = mugetn(dvi->buffer.data + dvi->buffer.pos, n);
+ dvi->buffer.pos += n;
+ return val;
+}
+
+static long dtell(DviContext *dvi)
+{
+ return dvi->depth ?
+ dvi->buffer.pos :
+ ftell(dvi->in) - dvi->buffer.length + dvi->buffer.pos;
+}
+
+static void dreset(DviContext *dvi)
+{
+ if(!dvi->buffer.frozen && dvi->buffer.data)
+ mdvi_free(dvi->buffer.data);
+ dvi->buffer.data = NULL;
+ dvi->buffer.size = 0;
+ dvi->buffer.length = 0;
+ dvi->buffer.pos = 0;
+}
+
+#define dsget1(d) dsgetn((d), 1)
+#define dsget2(d) dsgetn((d), 2)
+#define dsget3(d) dsgetn((d), 3)
+#define dsget4(d) dsgetn((d), 4)
+#define duget1(d) dugetn((d), 1)
+#define duget2(d) dugetn((d), 2)
+#define duget3(d) dugetn((d), 3)
+#define duget4(d) dugetn((d), 4)
+
+#ifndef NODEBUG
+static void dviprint(DviContext *dvi, const char *command, int sub, const char *fmt, ...)
+{
+ int i;
+ va_list ap;
+
+ printf("%s: ", dvi->filename);
+ for(i = 0; i < dvi->depth; i++)
+ printf(" ");
+ printf("%4lu: %s", dtell(dvi), command);
+ if(sub >= 0) printf("%d", sub);
+ if(*fmt) printf(": ");
+ va_start(ap, fmt);
+ vprintf(fmt, ap);
+ va_end(ap);
+}
+#define SHOWCMD(x) \
+ if(_mdvi_debug_mask & DBG_OPCODE) do { dviprint x; } while(0)
+#else
+#define SHOWCMD(x) do { } while(0)
+#endif
+
+int mdvi_find_tex_page(DviContext *dvi, int tex_page)
+{
+ int i;
+
+ for(i = 0; i < dvi->npages; i++)
+ if(dvi->pagemap[i][1] == tex_page)
+ return i;
+ return -1;
+}
+
+/* page sorting functions */
+static int sort_up(const void *p1, const void *p2)
+{
+ return ((long *)p1)[1] - ((long *)p2)[1];
+}
+static int sort_down(const void *p1, const void *p2)
+{
+ return ((long *)p2)[1] - ((long *)p1)[1];
+}
+static int sort_random(const void *p1, const void *p2)
+{
+ return (rand() % 1) ? -1 : 1;
+}
+static int sort_dvi_up(const void *p1, const void *p2)
+{
+ return ((long *)p1)[0] - ((long *)p2)[0];
+}
+static int sort_dvi_down(const void *p1, const void *p2)
+{
+ return ((long *)p1)[0] - ((long *)p2)[0];
+}
+
+void mdvi_sort_pages(DviContext *dvi, DviPageSort type)
+{
+ int (*sortfunc) __PROTO((const void *, const void *));
+
+ switch(type) {
+ case MDVI_PAGE_SORT_UP:
+ sortfunc = sort_up;
+ break;
+ case MDVI_PAGE_SORT_DOWN:
+ sortfunc = sort_down;
+ break;
+ case MDVI_PAGE_SORT_RANDOM:
+ sortfunc = sort_random;
+ break;
+ case MDVI_PAGE_SORT_DVI_UP:
+ sortfunc = sort_dvi_up;
+ break;
+ case MDVI_PAGE_SORT_DVI_DOWN:
+ sortfunc = sort_dvi_down;
+ break;
+ case MDVI_PAGE_SORT_NONE:
+ default:
+ sortfunc = NULL;
+ break;
+ }
+
+ if(sortfunc)
+ qsort(dvi->pagemap, dvi->npages, sizeof(PageNum), sortfunc);
+}
+
+static DviFontRef *define_font(DviContext *dvi, int op)
+{
+ Int32 arg;
+ Int32 scale;
+ Int32 dsize;
+ Int32 checksum;
+ int hdpi;
+ int vdpi;
+ int n;
+ char *name;
+ DviFontRef *ref;
+
+ arg = dugetn(dvi, op - DVI_FNT_DEF1 + 1);
+ checksum = duget4(dvi);
+ scale = duget4(dvi);
+ dsize = duget4(dvi);
+ hdpi = FROUND(dvi->params.mag * dvi->params.dpi * scale / dsize);
+ vdpi = FROUND(dvi->params.mag * dvi->params.vdpi * scale / dsize);
+ n = duget1(dvi) + duget1(dvi);
+ name = mdvi_malloc(n + 1);
+ dread(dvi, name, n);
+ name[n] = 0;
+ DEBUG((DBG_FONTS, "requesting font %d = `%s' at %.1fpt (%dx%d dpi)\n",
+ arg, name, (double)scale / (dvi->params.tfm_conv * 0x100000),
+ hdpi, vdpi));
+ ref = font_reference(&dvi->params, arg, name, checksum, hdpi, vdpi, scale);
+ if(ref == NULL) {
+ mdvi_error(_("could not load font `%s'\n"), name);
+ mdvi_free(name);
+ return NULL;
+ }
+ mdvi_free(name);
+ return ref;
+}
+
+static char *opendvi(const char *name)
+{
+ int len;
+ char *file;
+
+ len = strlen(name);
+ /* if file ends with .dvi and it exists, that's it */
+ if(len >= 4 && STREQ(name+len-4, ".dvi")) {
+ DEBUG((DBG_DVI|DBG_FILES, "opendvi: Trying `%s'\n", name));
+ if(access(name, R_OK) == 0)
+ return mdvi_strdup(name);
+ }
+
+ /* try appending .dvi */
+ file = mdvi_malloc(len + 5);
+ strcpy(file, name);
+ strcpy(file+len, ".dvi");
+ DEBUG((DBG_DVI|DBG_FILES, "opendvi: Trying `%s'\n", file));
+ if(access(file, R_OK) == 0)
+ return file;
+ /* try the given name */
+ file[len] = 0;
+ DEBUG((DBG_DVI|DBG_FILES, "opendvi: Trying `%s'\n", file));
+ if(access(file, R_OK) == 0)
+ return file;
+ mdvi_free(file);
+ return NULL;
+}
+
+int mdvi_reload(DviContext *dvi, DviParams *np)
+{
+ DviContext *newdvi;
+ DviParams *pars;
+
+ /* close our file */
+ if(dvi->in) {
+ fclose(dvi->in);
+ dvi->in = NULL;
+ }
+
+ pars = np ? np : &dvi->params;
+ DEBUG((DBG_DVI, "%s: reloading\n", dvi->filename));
+
+ /* load it again */
+ newdvi = mdvi_init_context(pars, dvi->pagesel, dvi->filename);
+ if(newdvi == NULL) {
+ mdvi_warning(_("could not reload `%s'\n"), dvi->filename);
+ return -1;
+ }
+
+ /* drop all our font references */
+ font_drop_chain(dvi->fonts);
+ /* destroy our font map */
+ if(dvi->fontmap)
+ mdvi_free(dvi->fontmap);
+ dvi->currfont = NULL;
+
+ /* and use the ones we just loaded */
+ dvi->fonts = newdvi->fonts;
+ dvi->fontmap = newdvi->fontmap;
+ dvi->nfonts = newdvi->nfonts;
+
+ /* copy the new information */
+ dvi->params = newdvi->params;
+ dvi->num = newdvi->num;
+ dvi->den = newdvi->den;
+ dvi->dvimag = newdvi->dvimag;
+ dvi->dviconv = newdvi->dviconv;
+ dvi->dvivconv = newdvi->dvivconv;
+ dvi->modtime = newdvi->modtime;
+
+ if(dvi->fileid) mdvi_free(dvi->fileid);
+ dvi->fileid = newdvi->fileid;
+
+ dvi->dvi_page_w = newdvi->dvi_page_w;
+ dvi->dvi_page_h = newdvi->dvi_page_h;
+
+ mdvi_free(dvi->pagemap);
+ dvi->pagemap = newdvi->pagemap;
+ dvi->npages = newdvi->npages;
+ if(dvi->currpage > dvi->npages-1)
+ dvi->currpage = 0;
+
+ mdvi_free(dvi->stack);
+ dvi->stack = newdvi->stack;
+ dvi->stacksize = newdvi->stacksize;
+
+ /* remove fonts that are not being used anymore */
+ font_free_unused(&dvi->device);
+
+ mdvi_free(newdvi->filename);
+ mdvi_free(newdvi);
+
+ DEBUG((DBG_DVI, "%s: reload successful\n", dvi->filename));
+ if(dvi->device.refresh)
+ dvi->device.refresh(dvi, dvi->device.device_data);
+
+ return 0;
+}
+
+/* function to change parameters ia DVI context
+ * The DVI context is modified ONLY if this function is successful */
+int mdvi_configure(DviContext *dvi, DviParamCode option, ...)
+{
+ va_list ap;
+ int reset_all;
+ int reset_font;
+ DviParams np;
+
+ va_start(ap, option);
+
+ reset_font = 0;
+ reset_all = 0;
+ np = dvi->params; /* structure copy */
+ while(option != MDVI_PARAM_LAST) {
+ switch(option) {
+ case MDVI_SET_DPI:
+ np.dpi = np.vdpi = va_arg(ap, Uint);
+ reset_all = 1;
+ break;
+ case MDVI_SET_XDPI:
+ np.dpi = va_arg(ap, Uint);
+ reset_all = 1;
+ break;
+ case MDVI_SET_YDPI:
+ np.vdpi = va_arg(ap, Uint);
+ break;
+ case MDVI_SET_SHRINK:
+ np.hshrink = np.vshrink = va_arg(ap, Uint);
+ reset_font = MDVI_FONTSEL_GREY|MDVI_FONTSEL_BITMAP;
+ break;
+ case MDVI_SET_XSHRINK:
+ np.hshrink = va_arg(ap, Uint);
+ reset_font = MDVI_FONTSEL_GREY|MDVI_FONTSEL_BITMAP;
+ break;
+ case MDVI_SET_YSHRINK:
+ np.vshrink = va_arg(ap, Uint);
+ reset_font = MDVI_FONTSEL_GREY|MDVI_FONTSEL_BITMAP;
+ break;
+ case MDVI_SET_ORIENTATION:
+ np.orientation = va_arg(ap, DviOrientation);
+ reset_font = MDVI_FONTSEL_GLYPH;
+ break;
+ case MDVI_SET_GAMMA:
+ np.gamma = va_arg(ap, double);
+ reset_font = MDVI_FONTSEL_GREY;
+ break;
+ case MDVI_SET_DENSITY:
+ np.density = va_arg(ap, Uint);
+ reset_font = MDVI_FONTSEL_BITMAP;
+ break;
+ case MDVI_SET_MAGNIFICATION:
+ np.mag = va_arg(ap, double);
+ reset_all = 1;
+ break;
+ case MDVI_SET_DRIFT:
+ np.hdrift = np.vdrift = va_arg(ap, int);
+ break;
+ case MDVI_SET_HDRIFT:
+ np.hdrift = va_arg(ap, int);
+ break;
+ case MDVI_SET_VDRIFT:
+ np.vdrift = va_arg(ap, int);
+ break;
+ case MDVI_SET_FOREGROUND:
+ np.fg = va_arg(ap, Ulong);
+ reset_font = MDVI_FONTSEL_GREY;
+ break;
+ case MDVI_SET_BACKGROUND:
+ np.bg = va_arg(ap, Ulong);
+ reset_font = MDVI_FONTSEL_GREY;
+ break;
+ default:
+ break;
+ }
+ option = va_arg(ap, DviParamCode);
+ }
+ va_end(ap);
+
+ /* check that all values make sense */
+ if(np.dpi <= 0 || np.vdpi <= 0)
+ return -1;
+ if(np.mag <= 0.0)
+ return -1;
+ if(np.density < 0)
+ return -1;
+ if(np.hshrink < 1 || np.vshrink < 1)
+ return -1;
+ if(np.hdrift < 0 || np.vdrift < 0)
+ return -1;
+ if(np.fg == np.bg)
+ return -1;
+
+ /*
+ * If the dpi or the magnification change, we basically have to reload
+ * the DVI file again from scratch.
+ */
+
+ if(reset_all)
+ return (mdvi_reload(dvi, &np) == 0);
+
+ if(np.hshrink != dvi->params.hshrink) {
+ np.conv = dvi->dviconv;
+ if(np.hshrink)
+ np.conv /= np.hshrink;
+ }
+ if(np.vshrink != dvi->params.vshrink) {
+ np.vconv = dvi->dvivconv;
+ if(np.vshrink)
+ np.vconv /= np.vshrink;
+ }
+
+ if(reset_font) {
+ font_reset_chain_glyphs(&dvi->device, dvi->fonts, reset_font);
+ }
+ dvi->params = np;
+ if((reset_font & MDVI_FONTSEL_GLYPH) && dvi->device.refresh) {
+ dvi->device.refresh(dvi, dvi->device.device_data);
+ return 0;
+ }
+
+ return 1;
+}
+/*
+ * Read the initial data from the DVI file. If something is wrong with the
+ * file, we just spit out an error message and refuse to load the file,
+ * without giving any details. This makes sense because DVI files are ok
+ * 99.99% of the time, and dvitype(1) can be used to check the other 0.01%.
+ */
+DviContext *mdvi_init_context(DviParams *par, DviPageSpec *spec, const char *file)
+{
+ FILE *p;
+ Int32 arg;
+ int op;
+ long offset;
+ int n;
+ DviContext *dvi;
+ char *filename;
+ int pagecount;
+
+ /*
+ * 1. Open the file and initialize the DVI context
+ */
+
+ filename = opendvi(file);
+ if(filename == NULL) {
+ perror(file);
+ return NULL;
+ }
+ p = fopen(filename, "rb");
+ if(p == NULL) {
+ perror(file);
+ mdvi_free(filename);
+ return NULL;
+ }
+ dvi = xalloc(DviContext);
+ memzero(dvi, sizeof(DviContext));
+ dvi->pagemap = NULL;
+ dvi->filename = filename;
+ dvi->stack = NULL;
+ dvi->modtime = get_mtime(fileno(p));
+ dvi->buffer.data = NULL;
+ dvi->pagesel = spec;
+ dvi->in = p; /* now we can use the dget*() functions */
+
+ /*
+ * 2. Read the preamble, extract scaling information, and
+ * setup the DVI parameters.
+ */
+
+ if(fuget1(p) != DVI_PRE)
+ goto bad_dvi;
+ if((arg = fuget1(p)) != DVI_ID) {
+ mdvi_error(_("%s: unsupported DVI format (version %u)\n"),
+ file, arg);
+ goto error; /* jump to the end of this routine,
+ * where we handle errors */
+ }
+ /* get dimensions */
+ dvi->num = fuget4(p);
+ dvi->den = fuget4(p);
+ dvi->dvimag = fuget4(p);
+
+ /* check that these numbers make sense */
+ if(!dvi->num || !dvi->den || !dvi->dvimag)
+ goto bad_dvi;
+
+ dvi->params.mag =
+ (par->mag > 0 ? par->mag : (double)dvi->dvimag / 1000.0);
+ dvi->params.hdrift = par->hdrift;
+ dvi->params.vdrift = par->vdrift;
+ dvi->params.dpi = par->dpi ? par->dpi : MDVI_DPI;
+ dvi->params.vdpi = par->vdpi ? par->vdpi : par->dpi;
+ dvi->params.hshrink = par->hshrink;
+ dvi->params.vshrink = par->vshrink;
+ dvi->params.density = par->density;
+ dvi->params.gamma = par->gamma;
+ dvi->params.conv = (double)dvi->num / dvi->den;
+ dvi->params.conv *= (dvi->params.dpi / 254000.0) * dvi->params.mag;
+ dvi->params.vconv = (double)dvi->num / dvi->den;
+ dvi->params.vconv *= (dvi->params.vdpi / 254000.0) * dvi->params.mag;
+ dvi->params.tfm_conv = (25400000.0 / dvi->num) *
+ ((double)dvi->den / 473628672) / 16.0;
+ dvi->params.flags = par->flags;
+ dvi->params.orientation = par->orientation;
+ dvi->params.fg = par->fg;
+ dvi->params.bg = par->bg;
+
+ /* initialize colors */
+ dvi->curr_fg = par->fg;
+ dvi->curr_bg = par->bg;
+ dvi->color_stack = NULL;
+ dvi->color_top = 0;
+ dvi->color_size = 0;
+
+ /* pixel conversion factors */
+ dvi->dviconv = dvi->params.conv;
+ dvi->dvivconv = dvi->params.vconv;
+ if(dvi->params.hshrink)
+ dvi->params.conv /= dvi->params.hshrink;
+ if(dvi->params.vshrink)
+ dvi->params.vconv /= dvi->params.vshrink;
+
+ /* get the comment from the preamble */
+ n = fuget1(p);
+ dvi->fileid = mdvi_malloc(n + 1);
+ fread(dvi->fileid, 1, n, p);
+ dvi->fileid[n] = 0;
+ DEBUG((DBG_DVI, "%s: %s\n", filename, dvi->fileid));
+
+ /*
+ * 3. Read postamble, extract page information (number of
+ * pages, dimensions) and stack depth.
+ */
+
+ /* jump to the end of the file */
+ if(fseek(p, (long)-1, SEEK_END) == -1)
+ goto error;
+ for(n = 0; (op = fuget1(p)) == DVI_TRAILER; n++)
+ if(fseek(p, (long)-2, SEEK_CUR) < 0)
+ break;
+ if(op != arg || n < 4)
+ goto bad_dvi;
+ /* get the pointer to postamble */
+ fseek(p, (long)-5, SEEK_CUR);
+ arg = fuget4(p);
+ /* jump to it */
+ fseek(p, (long)arg, SEEK_SET);
+ if(fuget1(p) != DVI_POST)
+ goto bad_dvi;
+ offset = fuget4(p);
+ if(dvi->num != fuget4(p) || dvi->den != fuget4(p) ||
+ dvi->dvimag != fuget4(p))
+ goto bad_dvi;
+ dvi->dvi_page_h = fuget4(p);
+ dvi->dvi_page_w = fuget4(p);
+ dvi->stacksize = fuget2(p);
+ dvi->npages = fuget2(p);
+ DEBUG((DBG_DVI, "%s: from postamble: stack depth %d, %d page%s\n",
+ filename, dvi->stacksize, dvi->npages, dvi->npages > 1 ? "s" : ""));
+
+ /*
+ * 4. Process font definitions.
+ */
+
+ /* process font definitions */
+ dvi->nfonts = 0;
+ dvi->fontmap = NULL;
+ /*
+ * CAREFUL: here we need to use the dvi->buffer, but it might leave the
+ * the file cursor in the wrong position after reading fonts (because of
+ * buffering). It's ok, though, because after the font definitions we read
+ * the page offsets, and we fseek() to the relevant part of the file with
+ * SEEK_SET. Nothing is read after the page offsets.
+ */
+ while((op = duget1(dvi)) != DVI_POST_POST) {
+ DviFontRef *ref;
+
+ if(op == DVI_NOOP)
+ continue;
+ else if(op < DVI_FNT_DEF1 || op > DVI_FNT_DEF4)
+ goto error;
+ ref = define_font(dvi, op);
+ if(ref == NULL)
+ goto error;
+ ref->next = dvi->fonts;
+ dvi->fonts = ref;
+ dvi->nfonts++;
+ }
+ /* we don't need the buffer anymore */
+ dreset(dvi);
+
+ if(op != DVI_POST_POST)
+ goto bad_dvi;
+ font_finish_definitions(dvi);
+ DEBUG((DBG_DVI, "%s: %d font%s required by this job\n",
+ filename, dvi->nfonts, dvi->nfonts > 1 ? "s" : ""));
+ dvi->findref = font_find_mapped;
+
+ /*
+ * 5. Build the page map.
+ */
+
+ dvi->pagemap = xnalloc(PageNum, dvi->npages);
+ memzero(dvi->pagemap, sizeof(PageNum) * dvi->npages);
+
+ n = dvi->npages - 1;
+ pagecount = n;
+ while(offset != -1) {
+ int i;
+ PageNum page;
+
+ fseek(p, offset, SEEK_SET);
+ op = fuget1(p);
+ if(op != DVI_BOP || n < 0)
+ goto bad_dvi;
+ for(i = 1; i <= 10; i++)
+ page[i] = fsget4(p);
+ page[0] = offset;
+ offset = fsget4(p);
+ /* check if the page is selected */
+ if(spec && mdvi_page_selected(spec, page, n) == 0) {
+ DEBUG((DBG_DVI, "Page %d (%ld.%ld.%ld.%ld.%ld.%ld.%ld.%ld.%ld.%ld) ignored by request\n",
+ n, page[1], page[2], page[3], page[4], page[5],
+ page[6], page[7], page[8], page[9], page[10]));
+ } else {
+ memcpy(&dvi->pagemap[pagecount], page, sizeof(PageNum));
+ pagecount--;
+ }
+ n--;
+ }
+ pagecount++;
+ if(pagecount >= dvi->npages) {
+ mdvi_error(_("no pages selected\n"));
+ goto error;
+ }
+ if(pagecount) {
+ DEBUG((DBG_DVI, "%d of %d pages selected\n",
+ dvi->npages - pagecount, dvi->npages));
+ dvi->npages -= pagecount;
+ memmove(dvi->pagemap, &dvi->pagemap[pagecount],
+ dvi->npages * sizeof(PageNum));
+ }
+
+ /*
+ * 6. Setup stack, initialize device functions
+ */
+
+ dvi->curr_layer = 0;
+ dvi->stack = xnalloc(DviState, dvi->stacksize + 8);
+
+ dvi->device.draw_glyph = dummy_draw_glyph;
+ dvi->device.draw_rule = dummy_draw_rule;
+ dvi->device.alloc_colors = dummy_alloc_colors;
+ dvi->device.create_image = dummy_create_image;
+ dvi->device.free_image = dummy_free_image;
+ dvi->device.dev_destroy = dummy_dev_destroy;
+ dvi->device.put_pixel = dummy_dev_putpixel;
+ dvi->device.refresh = dummy_dev_refresh;
+ dvi->device.set_color = dummy_dev_set_color;
+ dvi->device.device_data = NULL;
+
+ DEBUG((DBG_DVI, "%s read successfully\n", filename));
+ return dvi;
+
+bad_dvi:
+ mdvi_error(_("%s: File corrupted, or not a DVI file\n"), file);
+error:
+ /* if we came from the font definitions, this will be non-trivial */
+ dreset(dvi);
+ mdvi_destroy_context(dvi);
+ return NULL;
+}
+
+void mdvi_destroy_context(DviContext *dvi)
+{
+ if(dvi->device.dev_destroy)
+ dvi->device.dev_destroy(dvi->device.device_data);
+ /* release all fonts */
+ if(dvi->fonts) {
+ font_drop_chain(dvi->fonts);
+ font_free_unused(&dvi->device);
+ }
+ if(dvi->fontmap)
+ mdvi_free(dvi->fontmap);
+ if(dvi->filename)
+ mdvi_free(dvi->filename);
+ if(dvi->stack)
+ mdvi_free(dvi->stack);
+ if(dvi->pagemap)
+ mdvi_free(dvi->pagemap);
+ if(dvi->fileid)
+ mdvi_free(dvi->fileid);
+ if(dvi->in)
+ fclose(dvi->in);
+ if(dvi->buffer.data && !dvi->buffer.frozen)
+ mdvi_free(dvi->buffer.data);
+ if(dvi->color_stack)
+ mdvi_free(dvi->color_stack);
+
+ mdvi_free(dvi);
+}
+
+void mdvi_setpage(DviContext *dvi, int pageno)
+{
+ if(pageno < 0)
+ pageno = 0;
+ if(pageno > dvi->npages-1)
+ pageno = dvi->npages - 1;
+ dvi->currpage = pageno;
+}
+
+static int mdvi_run_macro(DviContext *dvi, Uchar *macro, size_t len)
+{
+ DviFontRef *curr, *fonts;
+ DviBuffer saved_buffer;
+ FILE *saved_file;
+ int opcode;
+ int oldtop;
+
+ dvi->depth++;
+ push(dvi, DVI_PUSH);
+ dvi->pos.w = 0;
+ dvi->pos.x = 0;
+ dvi->pos.y = 0;
+ dvi->pos.z = 0;
+
+ /* save our state */
+ curr = dvi->currfont;
+ fonts = dvi->fonts;
+ saved_buffer = dvi->buffer;
+ saved_file = dvi->in;
+ dvi->currfont = curr->ref->subfonts;
+ dvi->fonts = curr->ref->subfonts;
+ dvi->buffer.data = macro;
+ dvi->buffer.pos = 0;
+ dvi->buffer.length = len;
+ dvi->buffer.frozen = 1;
+ dvi->in = NULL;
+ oldtop = dvi->stacktop;
+
+ /* execute commands */
+ while((opcode = duget1(dvi)) != DVI_EOP) {
+ if(dvi_commands[opcode](dvi, opcode) < 0)
+ break;
+ }
+ if(opcode != DVI_EOP)
+ dviwarn(dvi, _("%s: vf macro had errors\n"),
+ curr->ref->fontname);
+ if(dvi->stacktop != oldtop)
+ dviwarn(dvi, _("%s: stack not empty after vf macro\n"),
+ curr->ref->fontname);
+
+ /* restore things */
+ pop(dvi, DVI_POP);
+ dvi->currfont = curr;
+ dvi->fonts = fonts;
+ dvi->buffer = saved_buffer;
+ dvi->in = saved_file;
+ dvi->depth--;
+
+ return (opcode != DVI_EOP ? -1 : 0);
+}
+
+int mdvi_dopage(DviContext *dvi, int pageno)
+{
+ int op;
+ int ppi;
+ int reloaded = 0;
+
+again:
+ if(dvi->in == NULL) {
+ /* try reopening the file */
+ dvi->in = fopen(dvi->filename, "rb");
+ if(dvi->in == NULL) {
+ mdvi_warning(_("%s: could not reopen file (%s)\n"),
+ dvi->filename,
+ strerror(errno));
+ return -1;
+ }
+ DEBUG((DBG_FILES, "reopen(%s) -> Ok\n", dvi->filename));
+ }
+
+ /* check if we need to reload the file */
+ if(!reloaded && get_mtime(fileno(dvi->in)) > dvi->modtime) {
+ mdvi_reload(dvi, &dvi->params);
+ /* we have to reopen the file, again */
+ reloaded = 1;
+ goto again;
+ }
+
+ if(pageno < 0 || pageno > dvi->npages-1) {
+ mdvi_error(_("%s: page %d out of range\n"),
+ dvi->filename, pageno);
+ return -1;
+ }
+
+ fseek(dvi->in, (long)dvi->pagemap[pageno][0], SEEK_SET);
+ if((op = fuget1(dvi->in)) != DVI_BOP) {
+ mdvi_error(_("%s: bad offset at page %d\n"),
+ dvi->filename, pageno+1);
+ return -1;
+ }
+
+ /* skip bop */
+ fseek(dvi->in, (long)44, SEEK_CUR);
+
+ /* reset state */
+ dvi->currfont = NULL;
+ memzero(&dvi->pos, sizeof(DviState));
+ dvi->stacktop = 0;
+ dvi->currpage = pageno;
+ dvi->curr_layer = 0;
+
+ if(dvi->buffer.data && !dvi->buffer.frozen)
+ mdvi_free(dvi->buffer.data);
+
+ /* reset our buffer */
+ dvi->buffer.data = NULL;
+ dvi->buffer.length = 0;
+ dvi->buffer.pos = 0;
+ dvi->buffer.frozen = 0;
+
+#if 0 /* make colors survive page breaks */
+ /* reset color stack */
+ mdvi_reset_color(dvi);
+#endif
+
+ /* set max horizontal and vertical drift (from dvips) */
+ if(dvi->params.hdrift < 0) {
+ ppi = dvi->params.dpi / dvi->params.hshrink; /* shrunk pixels per inch */
+ if(ppi < 600)
+ dvi->params.hdrift = ppi / 100;
+ else if(ppi < 1200)
+ dvi->params.hdrift = ppi / 200;
+ else
+ dvi->params.hdrift = ppi / 400;
+ }
+ if(dvi->params.vdrift < 0) {
+ ppi = dvi->params.vdpi / dvi->params.vshrink; /* shrunk pixels per inch */
+ if(ppi < 600)
+ dvi->params.vdrift = ppi / 100;
+ else if(ppi < 1200)
+ dvi->params.vdrift = ppi / 200;
+ else
+ dvi->params.vdrift = ppi / 400;
+ }
+
+ dvi->params.thinsp = FROUND(0.025 * dvi->params.dpi / dvi->params.conv);
+ dvi->params.vsmallsp = FROUND(0.025 * dvi->params.vdpi / dvi->params.vconv);
+
+ /* execute all the commands in the page */
+ while((op = duget1(dvi)) != DVI_EOP) {
+ if(dvi_commands[op](dvi, op) < 0)
+ break;
+ }
+
+ fflush(stdout);
+ fflush(stderr);
+ if(op != DVI_EOP)
+ return -1;
+ if(dvi->stacktop)
+ dviwarn(dvi, _("stack not empty at end of page\n"));
+ return 0;
+}
+
+static int inline move_vertical(DviContext *dvi, int amount)
+{
+ int rvv;
+
+ dvi->pos.v += amount;
+ rvv = vpixel_round(dvi, dvi->pos.v);
+ if(!dvi->params.vdrift)
+ return rvv;
+ if(amount > dvi->params.vsmallsp || amount <= -dvi->params.vsmallsp)
+ return rvv;
+ else {
+ int newvv;
+
+ newvv = dvi->pos.vv + vpixel_round(dvi, amount);
+ if(rvv - newvv > dvi->params.vdrift)
+ return rvv - dvi->params.vdrift;
+ else if(newvv - rvv > dvi->params.vdrift)
+ return rvv + dvi->params.vdrift;
+ else
+ return newvv;
+ }
+}
+
+static int inline move_horizontal(DviContext *dvi, int amount)
+{
+ int rhh;
+
+ dvi->pos.h += amount;
+ rhh = pixel_round(dvi, dvi->pos.h);
+ if(!dvi->params.hdrift)
+ return rhh;
+ else if(amount > dvi->params.thinsp || amount <= -6 * dvi->params.thinsp)
+ return rhh;
+ else {
+ int newhh;
+
+ newhh = dvi->pos.hh + pixel_round(dvi, amount);
+ if(rhh - newhh > dvi->params.hdrift)
+ return rhh - dvi->params.hdrift;
+ else if(newhh - rhh > dvi->params.hdrift)
+ return rhh + dvi->params.hdrift;
+ else
+ return newhh;
+ }
+}
+
+static void inline fix_after_horizontal(DviContext *dvi)
+{
+ int rhh;
+
+ rhh = pixel_round(dvi, dvi->pos.h);
+ if(!dvi->params.hdrift)
+ dvi->pos.hh = rhh;
+ else if(rhh - dvi->pos.hh > dvi->params.hdrift)
+ dvi->pos.hh = rhh - dvi->params.hdrift;
+ else if(dvi->pos.hh - rhh > dvi->params.hdrift)
+ dvi->pos.hh = rhh + dvi->params.hdrift;
+}
+
+/* commands */
+
+#define DBGSUM(a,b,c) \
+ (a), (b) > 0 ? '+' : '-', \
+ (b) > 0 ? (b) : -(b), (c)
+
+/*
+ * Draw rules with some sort of antialias support. Usefult for high-rate
+ * scale factors.
+ */
+
+static void draw_shrink_rule (DviContext *dvi, int x, int y, Uint w, Uint h, int f)
+{
+ int hs, vs, npixels;
+ Ulong fg, bg;
+ Ulong *pixels;
+
+ hs = dvi->params.hshrink;
+ vs = dvi->params.vshrink;
+ fg = dvi->curr_fg;
+ bg = dvi->curr_bg;
+
+ if (MDVI_ENABLED(dvi, MDVI_PARAM_ANTIALIASED)) {
+ npixels = vs * hs + 1;
+ pixels = get_color_table(&dvi->device, npixels, bg, fg,
+ dvi->params.gamma, dvi->params.density);
+
+ if (pixels) {
+ int color;
+
+ /* Lines with width 1 should be perfectly visible
+ * in shrink about 15. That is the reason of constant
+ */
+
+ color = (pow (vs / h * hs, 2) + pow (hs / w * vs, 2)) / 225;
+ if (color < npixels) {
+ fg = pixels[color];
+ } else {
+ fg = pixels[npixels - 1];
+ }
+ }
+ }
+
+ mdvi_push_color (dvi, fg, bg);
+ dvi->device.draw_rule(dvi, x, y, w, h, f);
+ mdvi_pop_color (dvi);
+
+ return;
+}
+
+/*
+ * The only commands that actually draw something are:
+ * set_char, set_rule
+ */
+
+static void draw_box(DviContext *dvi, DviFontChar *ch)
+{
+ DviGlyph *glyph = NULL;
+ int x, y, w, h;
+
+ if(!MDVI_GLYPH_UNSET(ch->shrunk.data))
+ glyph = &ch->shrunk;
+ else if(!MDVI_GLYPH_UNSET(ch->grey.data))
+ glyph = &ch->grey;
+ else if(!MDVI_GLYPH_UNSET(ch->glyph.data))
+ glyph = &ch->glyph;
+ if(glyph == NULL)
+ return;
+ x = glyph->x;
+ y = glyph->y;
+ w = glyph->w;
+ h = glyph->h;
+ /* this is bad -- we have to undo the orientation */
+ switch(dvi->params.orientation) {
+ case MDVI_ORIENT_TBLR:
+ break;
+ case MDVI_ORIENT_TBRL:
+ x = w - x;
+ break;
+ case MDVI_ORIENT_BTLR:
+ y = h - y;
+ break;
+ case MDVI_ORIENT_BTRL:
+ x = w - x;
+ y = h - y;
+ break;
+ case MDVI_ORIENT_RP90:
+ SWAPINT(w, h);
+ SWAPINT(x, y);
+ x = w - x;
+ break;
+ case MDVI_ORIENT_RM90:
+ SWAPINT(w, h);
+ SWAPINT(x, y);
+ y = h - y;
+ break;
+ case MDVI_ORIENT_IRP90:
+ SWAPINT(w, h);
+ SWAPINT(x, y);
+ break;
+ case MDVI_ORIENT_IRM90:
+ SWAPINT(w, h);
+ SWAPINT(x, y);
+ x = w - x;
+ y = h - y;
+ break;
+ }
+
+ draw_shrink_rule(dvi, dvi->pos.hh - x, dvi->pos.vv - y, w, h, 1);
+}
+
+int set_char(DviContext *dvi, int opcode)
+{
+ int num;
+ int h;
+ int hh;
+ DviFontChar *ch;
+ DviFont *font;
+
+ if(opcode < 128)
+ num = opcode;
+ else
+ num = dugetn(dvi, opcode - DVI_SET1 + 1);
+ if(dvi->currfont == NULL) {
+ dvierr(dvi, _("no default font set yet\n"));
+ return -1;
+ }
+ font = dvi->currfont->ref;
+ ch = font_get_glyph(dvi, font, num);
+ if(ch == NULL || ch->missing) {
+ /* try to display something anyway */
+ ch = FONTCHAR(font, num);
+ if(!glyph_present(ch)) {
+ dviwarn(dvi,
+ _("requested character %d does not exist in `%s'\n"),
+ num, font->fontname);
+ return 0;
+ }
+ draw_box(dvi, ch);
+ } else if(dvi->curr_layer <= dvi->params.layer) {
+ if(ISVIRTUAL(font))
+ mdvi_run_macro(dvi, (Uchar *)font->private +
+ ch->offset, ch->width);
+ else if(ch->width && ch->height)
+ dvi->device.draw_glyph(dvi, ch,
+ dvi->pos.hh, dvi->pos.vv);
+ }
+ if(opcode >= DVI_PUT1 && opcode <= DVI_PUT4) {
+ SHOWCMD((dvi, "putchar", opcode - DVI_PUT1 + 1,
+ "char %d (%s)\n",
+ num, dvi->currfont->ref->fontname));
+ } else {
+ h = dvi->pos.h + ch->tfmwidth;
+ hh = dvi->pos.hh + pixel_round(dvi, ch->tfmwidth);
+ SHOWCMD((dvi, "setchar", num, "(%d,%d) h:=%d%c%d=%d, hh:=%d (%s)\n",
+ dvi->pos.hh, dvi->pos.vv,
+ DBGSUM(dvi->pos.h, ch->tfmwidth, h), hh,
+ font->fontname));
+ dvi->pos.h = h;
+ dvi->pos.hh = hh;
+ fix_after_horizontal(dvi);
+ }
+
+ return 0;
+}
+
+int set_rule(DviContext *dvi, int opcode)
+{
+ Int32 a, b;
+ int h, w;
+
+ a = dsget4(dvi);
+ b = dsget4(dvi); w = rule_round(dvi, b);
+ if(a > 0 && b > 0) {
+ h = vrule_round(dvi, a);
+ SHOWCMD((dvi, opcode == DVI_SET_RULE ? "setrule" : "putrule", -1,
+ "width %d, height %d (%dx%d pixels)\n",
+ b, a, w, h));
+ /* the `draw' functions expect the origin to be at the top left
+ * corner of the rule, not the bottom left, as in DVI files */
+ if(dvi->curr_layer <= dvi->params.layer) {
+ draw_shrink_rule(dvi,
+ dvi->pos.hh, dvi->pos.vv - h + 1, w, h, 1);
+ }
+ } else {
+ SHOWCMD((dvi, opcode == DVI_SET_RULE ? "setrule" : "putrule", -1,
+ "(moving left only, by %d)\n", b));
+ }
+
+ if(opcode == DVI_SET_RULE) {
+ dvi->pos.h += b;
+ dvi->pos.hh += w;
+ fix_after_horizontal(dvi);
+ }
+ return 0;
+}
+
+int no_op(DviContext *dvi, int opcode)
+{
+ SHOWCMD((dvi, "noop", -1, ""));
+ return 0;
+}
+
+int push(DviContext *dvi, int opcode)
+{
+ if(dvi->stacktop == dvi->stacksize) {
+ if(!dvi->depth)
+ dviwarn(dvi, _("enlarging stack\n"));
+ dvi->stacksize += 8;
+ dvi->stack = xresize(dvi->stack,
+ DviState, dvi->stacksize);
+ }
+ memcpy(&dvi->stack[dvi->stacktop], &dvi->pos, sizeof(DviState));
+ SHOWCMD((dvi, "push", -1,
+ "level %d: (h=%d,v=%d,w=%d,x=%d,y=%d,z=%d,hh=%d,vv=%d)\n",
+ dvi->stacktop,
+ dvi->pos.h, dvi->pos.v, dvi->pos.w, dvi->pos.x,
+ dvi->pos.y, dvi->pos.z, dvi->pos.hh, dvi->pos.vv));
+ dvi->stacktop++;
+ return 0;
+}
+
+int pop(DviContext *dvi, int opcode)
+{
+ if(dvi->stacktop == 0) {
+ dvierr(dvi, _("stack underflow\n"));
+ return -1;
+ }
+ memcpy(&dvi->pos, &dvi->stack[dvi->stacktop-1], sizeof(DviState));
+ SHOWCMD((dvi, "pop", -1,
+ "level %d: (h=%d,v=%d,w=%d,x=%d,y=%d,z=%d,hh=%d,vv=%d)\n",
+ dvi->stacktop,
+ dvi->pos.h, dvi->pos.v, dvi->pos.w, dvi->pos.x,
+ dvi->pos.y, dvi->pos.z, dvi->pos.hh, dvi->pos.vv));
+ dvi->stacktop--;
+ return 0;
+}
+
+int move_right(DviContext *dvi, int opcode)
+{
+ Int32 arg;
+ int h, hh;
+
+ arg = dsgetn(dvi, opcode - DVI_RIGHT1 + 1);
+ h = dvi->pos.h;
+ hh = move_horizontal(dvi, arg);
+ SHOWCMD((dvi, "right", opcode - DVI_RIGHT1 + 1,
+ "%d h:=%d%c%d=%d, hh:=%d\n",
+ arg, DBGSUM(h, arg, dvi->pos.h), hh));
+ dvi->pos.hh = hh;
+ return 0;
+}
+
+int move_down(DviContext *dvi, int opcode)
+{
+ Int32 arg;
+ int v, vv;
+
+ arg = dsgetn(dvi, opcode - DVI_DOWN1 + 1);
+ v = dvi->pos.v;
+ vv = move_vertical(dvi, arg);
+ SHOWCMD((dvi, "down", opcode - DVI_DOWN1 + 1,
+ "%d v:=%d%c%d=%d, vv:=%d\n",
+ arg, DBGSUM(v, arg, dvi->pos.v), vv));
+ dvi->pos.vv = vv;
+ return 0;
+}
+
+int move_w(DviContext *dvi, int opcode)
+{
+ int h, hh;
+
+ if(opcode != DVI_W0)
+ dvi->pos.w = dsgetn(dvi, opcode - DVI_W0);
+ h = dvi->pos.h;
+ hh = move_horizontal(dvi, dvi->pos.w);
+ SHOWCMD((dvi, "w", opcode - DVI_W0,
+ "%d h:=%d%c%d=%d, hh:=%d\n",
+ dvi->pos.w, DBGSUM(h, dvi->pos.w, dvi->pos.h), hh));
+ dvi->pos.hh = hh;
+ return 0;
+}
+
+int move_x(DviContext *dvi, int opcode)
+{
+ int h, hh;
+
+ if(opcode != DVI_X0)
+ dvi->pos.x = dsgetn(dvi, opcode - DVI_X0);
+ h = dvi->pos.h;
+ hh = move_horizontal(dvi, dvi->pos.x);
+ SHOWCMD((dvi, "x", opcode - DVI_X0,
+ "%d h:=%d%c%d=%d, hh:=%d\n",
+ dvi->pos.x, DBGSUM(h, dvi->pos.x, dvi->pos.h), hh));
+ dvi->pos.hh = hh;
+ return 0;
+}
+
+int move_y(DviContext *dvi, int opcode)
+{
+ int v, vv;
+
+ if(opcode != DVI_Y0)
+ dvi->pos.y = dsgetn(dvi, opcode - DVI_Y0);
+ v = dvi->pos.v;
+ vv = move_vertical(dvi, dvi->pos.y);
+ SHOWCMD((dvi, "y", opcode - DVI_Y0,
+ "%d h:=%d%c%d=%d, hh:=%d\n",
+ dvi->pos.y, DBGSUM(v, dvi->pos.y, dvi->pos.v), vv));
+ dvi->pos.vv = vv;
+ return 0;
+}
+
+int move_z(DviContext *dvi, int opcode)
+{
+ int v, vv;
+
+ if(opcode != DVI_Z0)
+ dvi->pos.z = dsgetn(dvi, opcode - DVI_Z0);
+ v = dvi->pos.v;
+ vv = move_vertical(dvi, dvi->pos.z);
+ SHOWCMD((dvi, "z", opcode - DVI_Z0,
+ "%d h:=%d%c%d=%d, hh:=%d\n",
+ dvi->pos.z, DBGSUM(v, dvi->pos.z, dvi->pos.v), vv));
+ dvi->pos.vv = vv;
+ return 0;
+}
+
+int sel_font(DviContext *dvi, int opcode)
+{
+ DviFontRef *ref;
+ int ndx;
+
+ ndx = opcode - DVI_FNT_NUM0;
+ if(dvi->depth)
+ ref = font_find_flat(dvi, ndx);
+ else
+ ref = dvi->findref(dvi, ndx);
+ if(ref == NULL) {
+ dvierr(dvi, _("font %d is not defined\n"),
+ opcode - DVI_FNT_NUM0);
+ return -1;
+ }
+ SHOWCMD((dvi, "fntnum", opcode - DVI_FNT_NUM0,
+ "current font is %s\n",
+ ref->ref->fontname));
+ dvi->currfont = ref;
+ return 0;
+}
+
+int sel_fontn(DviContext *dvi, int opcode)
+{
+ Int32 arg;
+ DviFontRef *ref;
+
+ arg = dugetn(dvi, opcode - DVI_FNT1 + 1);
+ if(dvi->depth)
+ ref = font_find_flat(dvi, arg);
+ else
+ ref = dvi->findref(dvi, arg);
+ if(ref == NULL) {
+ dvierr(dvi, _("font %d is not defined\n"), arg);
+ return -1;
+ }
+ SHOWCMD((dvi, "fnt", opcode - DVI_FNT1 + 1,
+ "current font is %s (id %d)\n",
+ ref->ref->fontname, arg));
+ dvi->currfont = ref;
+ return 0;
+}
+
+int special(DviContext *dvi, int opcode)
+{
+ char *s;
+ Int32 arg;
+
+ arg = dugetn(dvi, opcode - DVI_XXX1 + 1);
+ s = mdvi_malloc(arg + 1);
+ dread(dvi, s, arg);
+ s[arg] = 0;
+ mdvi_do_special(dvi, s);
+ SHOWCMD((dvi, "XXXX", opcode - DVI_XXX1 + 1,
+ "[%s]", s));
+ mdvi_free(s);
+ return 0;
+}
+
+int def_font(DviContext *dvi, int opcode)
+{
+ DviFontRef *ref;
+ Int32 arg;
+
+ arg = dugetn(dvi, opcode - DVI_FNT_DEF1 + 1);
+ if(dvi->depth)
+ ref = font_find_flat(dvi, arg);
+ else
+ ref = dvi->findref(dvi, arg);
+ /* skip the rest */
+ dskip(dvi, 12);
+ dskip(dvi, duget1(dvi) + duget1(dvi));
+ if(ref == NULL) {
+ dvierr(dvi, _("font %d is not defined in postamble\n"), arg);
+ return -1;
+ }
+ SHOWCMD((dvi, "fntdef", opcode - DVI_FNT_DEF1 + 1,
+ "%d -> %s (%d links)\n",
+ ref->fontid, ref->ref->fontname,
+ ref->ref->links));
+ return 0;
+}
+
+int unexpected(DviContext *dvi, int opcode)
+{
+ dvierr(dvi, _("unexpected opcode %d\n"), opcode);
+ return -1;
+}
+
+int undefined(DviContext *dvi, int opcode)
+{
+ dvierr(dvi, _("undefined opcode %d\n"), opcode);
+ return -1;
+}
+
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-03 21:48:06 +0000