static unsigned int
nr_arena_group_render (cairo_t *ct, NRArenaItem *item, NRRectL *area, NRPixBlock *pb, unsigned int flags)
{
NRArenaGroup *group = NR_ARENA_GROUP (item);
unsigned int ret = item->state;
/* Just compose children into parent buffer */
for (NRArenaItem *child = group->children; child != NULL; child = child->next) {
ret = nr_arena_item_invoke_render (ct, child, area, pb, flags);
if (ret & NR_ARENA_ITEM_STATE_INVALID) break;
}
return ret;
}
void
sp_canvas_arena_render_pixblock (SPCanvasArena *ca, NRPixBlock *pb)
{
NRRectL area;
g_return_if_fail (ca != NULL);
g_return_if_fail (SP_IS_CANVAS_ARENA (ca));
/* fixme: */
pb->empty = FALSE;
area.x0 = pb->area.x0;
area.y0 = pb->area.y0;
area.x1 = pb->area.x1;
area.y1 = pb->area.y1;
nr_arena_item_invoke_render (ca->root, &area, pb, 0);
}
static void
sp_canvas_arena_render (SPCanvasItem *item, SPCanvasBuf *buf)
{
SPCanvasArena *arena;
gint bw, bh, sw, sh;
gint x, y;
arena = SP_CANVAS_ARENA (item);
nr_arena_item_invoke_update (arena->root, NULL, &arena->gc,
NR_ARENA_ITEM_STATE_BBOX | NR_ARENA_ITEM_STATE_RENDER,
NR_ARENA_ITEM_STATE_NONE);
if (buf->is_bg) {
sp_canvas_clear_buffer (buf);
buf->is_bg = FALSE;
buf->is_buf = TRUE;
}
bw = buf->rect.x1 - buf->rect.x0;
bh = buf->rect.y1 - buf->rect.y0;
if ((bw < 1) || (bh < 1)) return;
/* 65536 is max cached buffer and we need 4 channels */
if (bw * bh < 16384) {
/* We can go with single buffer */
sw = bw;
sh = bh;
} else if (bw <= 2048) {
/* Go with row buffer */
sw = bw;
sh = 16384 / bw;
} else if (bh <= 2048) {
/* Go with column buffer */
sw = 16384 / bh;
sh = bh;
} else {
sw = 128;
sh = 128;
}
/* fixme: RGB transformed bitmap blit is not implemented (Lauris) */
/* And even if it would be, unless it uses MMX there is little reason to go RGB */
#define STRICT_RGBA
for (y = buf->rect.y0; y < buf->rect.y1; y += sh) {
for (x = buf->rect.x0; x < buf->rect.x1; x += sw) {
NRRectL area;
#ifdef STRICT_RGBA
NRPixBlock pb;
#endif
NRPixBlock cb;
area.x0 = x;
area.y0 = y;
area.x1 = MIN (x + sw, buf->rect.x1);
area.y1 = MIN (y + sh, buf->rect.y1);
#ifdef STRICT_RGBA
nr_pixblock_setup_fast (&pb, NR_PIXBLOCK_MODE_R8G8B8A8P, area.x0, area.y0, area.x1, area.y1, TRUE);
/* fixme: */
pb.empty = FALSE;
#endif
nr_pixblock_setup_extern (&cb, NR_PIXBLOCK_MODE_R8G8B8, area.x0, area.y0, area.x1, area.y1,
buf->buf + (y - buf->rect.y0) * buf->buf_rowstride + 3 * (x - buf->rect.x0),
buf->buf_rowstride,
FALSE, FALSE);
#ifdef STRICT_RGBA
nr_arena_item_invoke_render (arena->root, &area, &pb, 0);
nr_blit_pixblock_pixblock (&cb, &pb);
nr_pixblock_release (&pb);
#else
nr_arena_item_invoke_render (arena->root, &area, &cb, 0);
#endif
nr_pixblock_release (&cb);
}
}
}
GdkPixbuf* render_pixbuf(NRArenaItem* root, double scale_factor, const Geom::Rect& dbox, unsigned psize) {
NRGC gc(NULL);
Geom::Matrix t(Geom::Scale(scale_factor, scale_factor));
nr_arena_item_set_transform(root, t);
gc.transform.setIdentity();
nr_arena_item_invoke_update( root, NULL, &gc,
NR_ARENA_ITEM_STATE_ALL,
NR_ARENA_ITEM_STATE_NONE );
/* Item integer bbox in points */
NRRectL ibox;
ibox.x0 = (int) floor(scale_factor * dbox.min()[Geom::X] + 0.5);
ibox.y0 = (int) floor(scale_factor * dbox.min()[Geom::Y] + 0.5);
ibox.x1 = (int) floor(scale_factor * dbox.max()[Geom::X] + 0.5);
ibox.y1 = (int) floor(scale_factor * dbox.max()[Geom::Y] + 0.5);
/* Find visible area */
int width = ibox.x1 - ibox.x0;
int height = ibox.y1 - ibox.y0;
int dx = psize;
int dy = psize;
dx = (dx - width)/2; // watch out for size, since 'unsigned'-'signed' can cause problems if the result is negative
dy = (dy - height)/2;
NRRectL area;
area.x0 = ibox.x0 - dx;
area.y0 = ibox.y0 - dy;
area.x1 = area.x0 + psize;
area.y1 = area.y0 + psize;
/* Actual renderable area */
NRRectL ua;
ua.x0 = std::max(ibox.x0, area.x0);
ua.y0 = std::max(ibox.y0, area.y0);
ua.x1 = std::min(ibox.x1, area.x1);
ua.y1 = std::min(ibox.y1, area.y1);
/* Set up pixblock */
guchar *px = g_new(guchar, 4 * psize * psize);
memset(px, 0x00, 4 * psize * psize);
/* Render */
NRPixBlock B;
nr_pixblock_setup_extern( &B, NR_PIXBLOCK_MODE_R8G8B8A8N,
ua.x0, ua.y0, ua.x1, ua.y1,
px + 4 * psize * (ua.y0 - area.y0) +
4 * (ua.x0 - area.x0),
4 * psize, FALSE, FALSE );
nr_arena_item_invoke_render(NULL, root, &ua, &B,
NR_ARENA_ITEM_RENDER_NO_CACHE );
nr_pixblock_release(&B);
GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(px,
GDK_COLORSPACE_RGB,
TRUE,
8, psize, psize, psize * 4,
(GdkPixbufDestroyNotify)g_free,
NULL);
return pixbuf;
}