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, int p, int zoom, int rotate,
  12                 fbval_t *bitmap, int *rows, int *cols)
  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         *cols = w;
  42         *rows = h;
  43         return 0;
  44 }
  45
  46 int doc_pages(struct doc *doc)
  47 {
  48         return poppler_document_get_n_pages(doc->doc);
  49 }
  50
  51 struct doc *doc_open(char *path)
  52 {
  53         struct doc *doc = malloc(sizeof(*doc));
  54         char abspath[PATH_MAX];
  55         char uri[PATH_MAX + 16];
  56         realpath(path, abspath);
  57         snprintf(uri, sizeof(uri), "file://%s", abspath);
  58         g_type_init();
  59         doc->doc = poppler_document_new_from_file(uri, NULL, NULL);
  60         return doc;
  61 }
  62
  63 void doc_close(struct doc *doc)
  64 {
  65         g_object_unref(G_OBJECT(doc->doc));
  66         free(doc);
  67 }