initial version of load_page()

1 files changed, 142 insertions, 0 deletions

diff --git a/src/PostscriptDSC.cxx b/src/PostscriptDSC.cxx
new file mode 100644
index 0000000..bd47837
--- /dev/null
+++ b/src/PostscriptDSC.cxx
@@ -0,0 +1,142 @@
+// 
+// Postscript Document Structure Convention handling routines.
+//
+// Copyright 2006 by Johannes Hofmann
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library 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
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+// USA.
+//
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include "PostscriptDSC.H"
+
+PostscriptDSC::PostscriptDSC() {
+  bb_x = 0;
+  bb_y = 0;
+  bb_w = 594; // A4 
+  bb_h = 841; //
+  setup_len = 0;
+  pages = 0;
+  page_off = NULL;
+  page_len = NULL;
+}
+
+int 
+PostscriptDSC::parse(int fd) {
+  FILE *fp;
+  char linebuf[1024];
+  int x, y, w, h;
+  int p1, p2, ps;
+  int i = 0;
+
+  bb_x = 0;
+  bb_y = 0;
+  bb_w = 594; // A4 
+  bb_h = 841; //
+  setup_len = 0;
+  pages = 0;
+  page_off = NULL;
+  page_len = NULL;
+
+  fp = fdopen(fd, "r");
+  if (!fp) {
+    perror("fdopen");
+    return 1;
+  }
+
+  while (fgets(linebuf, sizeof(linebuf), fp) != NULL) {
+    if (sscanf(linebuf, "%%%%BoundingBox: %d %d %d %d", &x, &y, &w, &h) == 4) {
+      bb_x = x; 
+      bb_y = y; 
+      bb_w = w; 
+      bb_h = h; 
+    } else if (strncmp(linebuf, "%%EndSetup", strlen("%%EndSetup")) == 0) {
+      setup_len = ftello(fp);
+    } else if (sscanf(linebuf, "%%%%Pages: %d", &ps) == 1) {
+      if (pages != 0) {
+        fprintf(stderr, "Multiple Pages tags found\n");
+        free(page_off);
+        free(page_len);
+        return 1;
+      }
+
+      pages = ps;
+      page_off = (size_t*) malloc(sizeof(size_t) * (pages + 1));
+      memset(page_off, 0, sizeof(size_t) * (pages + 1));
+      page_len = (size_t*) malloc(sizeof(size_t) * (pages + 1));
+      memset(page_len, 0, sizeof(size_t) * (pages + 1));
+    } else if (sscanf(linebuf, "%%%%Page: %d %d", &p1, &p2) == 2) {
+      if (p2 > pages) {
+        fprintf(stderr, "Page %d > Pages (%d)\n", p1, pages);
+        return 1;
+      } 
+      if (page_off[p1] != NULL) {
+        fprintf(stderr, "Page %d already defined\n", p1);
+        return 1;
+      }
+      if (p1 > 1 && page_off[p1 - 1] == NULL) {
+        fprintf(stderr, "Page %d not yet defined\n", p1 - 1);
+        return 1;
+      }
+
+      page_off[p1] = ftello(fp);
+      if (p1 > 1) {
+        page_len[p1 - 1] = page_off[p1] - page_off[p1 - 1];
+      }
+    }      
+  }
+}
+
+void
+PostscriptDSC::get_bounding_box(int *x, int *y, int *w, int *h) {
+  *x = bb_x;
+  *y = bb_y;
+  *w = bb_w;
+  *h = bb_h;
+}
+
+int
+PostscriptDSC::get_pages() {
+  return pages;
+}
+
+size_t
+PostscriptDSC::get_setup_len() {
+  return setup_len;
+}
+
+size_t
+PostscriptDSC::get_page_off(int p) {
+  return page_off[p];
+}
+
+size_t
+PostscriptDSC::get_page_len(int p) {
+  return page_len[p];
+}
+
+void
+PostscriptDSC::print() {
+  int i;
+
+  printf("x %d, y %d, w %d, h %d\n", bb_x, bb_y, bb_w, bb_h);
+  printf("setup_len %d\n", setup_len);
+  for (i=0; i<pages; i++) {
+    printf("p %d, off %d, len %d\n", i, page_off[i], page_len[i]);
+  }
+}
+