poppler.c

   1 #include <stdlib.h>
   2 #include <string.h>
   3 #include <cairo/cairo.h>
   4 #include <glib/poppler.h>
   5 #include "doc.h"
   6
   7 struct doc {
   8         PopplerDocument *doc;
   9 };
  10
  11 int doc_draw(struct doc *doc, fbval_t *bitmap, int p,
  12                 int rows, int cols, int zoom, int rotate)
  13 {
  14         cairo_t *cairo;
  15         cairo_surface_t *surface;
  16         PopplerPage *page;
  17         unsigned char *img;
  18         int i, j;
  19         int h, w;
  20         int iw;
  21         surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, cols, rows);
  22         cairo = cairo_create(surface);
  23         cairo_scale(cairo, (float) zoom / 10, (float) zoom / 10);
  24         cairo_set_source_rgb(cairo, 1.0, 1.0, 1.0);
  25         cairo_paint(cairo);
  26         img = cairo_image_surface_get_data(surface);
  27         page = poppler_document_get_page(doc->doc, p - 1);
  28         poppler_page_render(page, cairo);
  29         iw = cairo_image_surface_get_width(surface);
  30         h = MIN(rows, cairo_image_surface_get_height(surface));
  31         w = MIN(cols, iw);
  32         for (i = 0; i < h; i++) {
  33                 for (j = 0; j < w; j++) {
  34                         unsigned char *s = img + (i * iw + j) * 4;
  35                         bitmap[i * cols + j] = FB_VAL(*(s + 2), *(s + 1), *s);
  36                 }
  37         }
  38         cairo_destroy(cairo);
  39         cairo_surface_destroy(surface);
  40         g_object_unref(G_OBJECT(page));
  41         return 0;
  42 }
  43
  44 int doc_pages(struct doc *doc)
  45 {
  46         return poppler_document_get_n_pages(doc->doc);
  47 }
  48
  49 struct doc *doc_open(char *path)
  50 {
  51         struct doc *doc = malloc(sizeof(*doc));
  52         char abspath[PATH_MAX];
  53         char uri[PATH_MAX + 16];
  54         realpath(path, abspath);
  55         snprintf(uri, sizeof(uri), "file://%s", abspath);
  56         g_type_init();
  57         doc->doc = poppler_document_new_from_file(uri, NULL, NULL);
  58         return doc;
  59 }
  60
  61 void doc_close(struct doc *doc)
  62 {
  63         g_object_unref(G_OBJECT(doc->doc));
  64         free(doc);
  65 }