backend/ev-document-misc.c

   1
   2 #include "ev-document-misc.h"
   3 #include <string.h>
   4 #include <gtk/gtk.h>
   5
   6 /* Returns a new GdkPixbuf that is suitable for placing in the thumbnail view.
   7  * It is four pixels wider and taller than the source.  If source_pixbuf is not
   8  * NULL, then it will fill the return pixbuf with the contents of
   9  * source_pixbuf.
  10  */
  11
  12 GdkPixbuf *
  13 ev_document_misc_get_thumbnail_frame (int        width,
  14                                       int        height,
  15                                       GdkPixbuf *source_pixbuf)
  16 {
  17         GdkPixbuf *retval;
  18         guchar *data;
  19         gint rowstride;
  20         int i;
  21
  22         if (source_pixbuf)
  23                 g_return_val_if_fail (GDK_IS_PIXBUF (source_pixbuf), NULL);
  24
  25         if (source_pixbuf) {
  26                 width = gdk_pixbuf_get_width (source_pixbuf);
  27                 height = gdk_pixbuf_get_height (source_pixbuf);
  28         }
  29
  30         /* make sure no one is passing us garbage */
  31         g_assert (width > 0 && height > 0);
  32
  33         retval = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
  34                                  TRUE, 8,
  35                                  width + 4,
  36                                  height + 4);
  37
  38         /* make it black and fill in the middle */
  39         data = gdk_pixbuf_get_pixels (retval);
  40         rowstride = gdk_pixbuf_get_rowstride (retval);
  41
  42         gdk_pixbuf_fill (retval, 0x000000ff);
  43         for (i = 1; i < height + 1; i++)
  44                 memset (data + (rowstride * i) + 4, 0xffffffff, width * 4);
  45
  46         /* copy the source pixbuf */
  47         if (source_pixbuf)
  48                 gdk_pixbuf_copy_area (source_pixbuf, 0, 0,
  49                                       width,
  50                                       height,
  51                                       retval,
  52                                       1, 1);
  53         /* Add the corner */
  54         data [(width + 2) * 4 + 3] = 0;
  55         data [(width + 3) * 4 + 3] = 0;
  56         data [(width + 2) * 4 + (rowstride * 1) + 3] = 0;
  57         data [(width + 3) * 4 + (rowstride * 1) + 3] = 0;
  58
  59         data [(height + 2) * rowstride + 3] = 0;
  60         data [(height + 3) * rowstride + 3] = 0;
  61         data [(height + 2) * rowstride + 4 + 3] = 0;
  62         data [(height + 3) * rowstride + 4 + 3] = 0;
  63
  64         return retval;
  65 }
  66
  67 void
  68 ev_document_misc_get_page_border_size (gint       page_width,
  69                                        gint       page_height,
  70                                        GtkBorder *border)
  71 {
  72         g_assert (border);
  73
  74         border->left = 1;
  75         border->top = 1;
  76         if (page_width < 100) {
  77                 border->right = 2;
  78                 border->bottom = 2;
  79         } else if (page_width < 500) {
  80                 border->right = 3;
  81                 border->bottom = 3;
  82         } else {
  83                 border->right = 4;
  84                 border->bottom = 4;
  85         }
  86 }
  87
  88
  89 void
  90 ev_document_misc_paint_one_page (GdkDrawable  *drawable,
  91                                  GtkWidget    *widget,
  92                                  GdkRectangle *area,
  93                                  GtkBorder    *border)
  94 {
  95         gdk_draw_rectangle (drawable,
  96                             widget->style->black_gc,
  97                             TRUE,
  98                             area->x,
  99                             area->y,
 100                             area->width,
 101                             area->height);
 102         gdk_draw_rectangle (drawable,
 103                             widget->style->white_gc,
 104                             TRUE,
 105                             area->x + border->left,
 106                             area->y + border->top,
 107                             area->width - (border->left + border->right),
 108                             area->height - (border->top + border->bottom));
 109         gdk_draw_rectangle (drawable,
 110                             widget->style->mid_gc[widget->state],
 111                             TRUE,
 112                             area->x,
 113                             area->y + area->height - (border->bottom - border->top),
 114                             border->bottom - border->top,
 115                             border->bottom - border->top);
 116         gdk_draw_rectangle (drawable,
 117                             widget->style->mid_gc[widget->state],
 118                             TRUE,
 119                             area->x + area->width - (border->right - border->left),
 120                             area->y,
 121                             border->right - border->left,
 122                             border->right - border->left);
 123
 124 }