static int
gnome_print_multipage_image (GnomePrintContext *pc, const gdouble *affine, const guchar *px, gint w, gint h, gint rowstride, gint ch)
{
GnomePrintMultipage *mp;
gdouble a[6];
mp = GNOME_PRINT_MULTIPAGE(pc);
art_affine_multiply (a, affine, mp->subpage->data);
return gnome_print_image_transform (mp->subpc, a, px, w, h, rowstride, ch);
}
static int
gnome_print_multipage_glyphlist (GnomePrintContext *pc, const gdouble *affine, GnomeGlyphList *gl)
{
GnomePrintMultipage *mp;
gdouble a[6];
mp = GNOME_PRINT_MULTIPAGE(pc);
art_affine_multiply (a, affine, mp->subpage->data);
return gnome_print_glyphlist_transform (mp->subpc, a, gl);
}
/* This is copied from mate-canvas.c since it is declared static */
static void
invoke_update (MateCanvasItem *item, double *affine, ArtSVP *clip_path, int flags)
{
int child_flags;
double *child_affine;
double i2w[6], w2c[6], i2c[6];
child_flags = flags;
if (!(item->object.flags & MATE_CANVAS_ITEM_VISIBLE))
child_flags &= ~MATE_CANVAS_UPDATE_IS_VISIBLE;
/* Apply the child item's transform */
mate_canvas_item_i2w_affine (item, i2w);
mate_canvas_w2c_affine (item->canvas, w2c);
art_affine_multiply (i2c, i2w, w2c);
child_affine = i2c;
/* apply object flags to child flags */
child_flags &= ~MATE_CANVAS_UPDATE_REQUESTED;
if (item->object.flags & MATE_CANVAS_ITEM_NEED_UPDATE)
child_flags |= MATE_CANVAS_UPDATE_REQUESTED;
if (item->object.flags & MATE_CANVAS_ITEM_NEED_AFFINE)
child_flags |= MATE_CANVAS_UPDATE_AFFINE;
if (item->object.flags & MATE_CANVAS_ITEM_NEED_CLIP)
child_flags |= MATE_CANVAS_UPDATE_CLIP;
if (item->object.flags & MATE_CANVAS_ITEM_NEED_VIS)
child_flags |= MATE_CANVAS_UPDATE_VISIBILITY;
if ((child_flags & (MATE_CANVAS_UPDATE_REQUESTED
| MATE_CANVAS_UPDATE_AFFINE
| MATE_CANVAS_UPDATE_CLIP
| MATE_CANVAS_UPDATE_VISIBILITY))
&& MATE_CANVAS_ITEM_GET_CLASS (item)->update)
(* MATE_CANVAS_ITEM_GET_CLASS (item)->update) (
item, child_affine, clip_path, child_flags);
}
static double
gnome_canvas_item_invoke_point (GnomeCanvasItem *item, double x, double y, int cx, int cy,
GnomeCanvasItem **actual_item)
{
#ifdef HACKISH_AFFINE
double i2w[6], w2c[6], i2c[6], c2i[6];
ArtPoint c, i;
#endif
#ifdef HACKISH_AFFINE
gnome_canvas_item_i2w_affine (item, i2w);
gnome_canvas_w2c_affine (item->canvas, w2c);
art_affine_multiply (i2c, i2w, w2c);
art_affine_invert (c2i, i2c);
c.x = cx;
c.y = cy;
art_affine_point (&i, &c, c2i);
x = i.x;
y = i.y;
#endif
return (* GNOME_CANVAS_ITEM_CLASS (GTK_OBJECT_GET_CLASS (item))->point) (
item, x, y, cx, cy, actual_item);
}
static void
test_affine (void) {
double src[6];
double dst[6];
double src2[6];
char str[128];
int i;
ArtPoint ps, pd, ptmp;
for (i = 0; i < 6; i++)
{
src[i] = (rand () * 2.0 / RAND_MAX) - 1.0;
src2[i] = (rand () * 2.0 / RAND_MAX) - 1.0;
}
#if 0
src[0] = 0.9999999;
src[1] = -0.000001;
src[2] = 0.000001;
src[3] = 0.9999999;
src[4] = 0;
src[5] = 0;
#if 1
src[0] = 0.98480775;
src[1] = -0.17364818;
src[2] = 0.17364818;
src[3] = 0.98480775;
#endif
src2[0] = 0.98480775;
src2[1] = -0.17364818;
src2[2] = 0.17364818;
src2[3] = 0.98480775;
#endif
ps.x = rand() * 100.0 / RAND_MAX;
ps.y = rand() * 100.0 / RAND_MAX;
art_affine_point (&pd, &ps, src);
art_affine_invert (dst, src);
art_affine_point (&ptmp, &pd, dst);
art_affine_to_string (str, src);
printf ("src = %s\n", str);
art_affine_to_string (str, dst);
printf ("dst = %s\n", str);
printf ("point (%g, %g) -> (%g, %g) -> (%g, %g)\n",
ps.x, ps.y, pd.x, pd.y, ptmp.x, ptmp.y);
art_affine_point (&ptmp, &ps, src);
art_affine_point (&pd, &ptmp, src2);
art_affine_to_string (str, src2);
printf ("src2 = %s\n", str);
printf ("point (%g, %g) -> (%g, %g) -> (%g, %g)\n",
ps.x, ps.y, ptmp.x, ptmp.y, pd.x, pd.y);
art_affine_multiply (dst, src, src2);
art_affine_to_string (str, dst);
printf ("dst = %s\n", str);
art_affine_point (&pd, &ps, dst);
printf ("point (%g, %g) -> (%g, %g)\n",
ps.x, ps.y, pd.x, pd.y);
}