void FilterSlot::get_final(int slot_nr, NRPixBlock *result) {
NRPixBlock *final_usr = get(slot_nr);
Geom::Matrix trans = units.get_matrix_pb2display();
int size = (result->area.x1 - result->area.x0)
* (result->area.y1 - result->area.y0)
* NR_PIXBLOCK_BPP(result);
memset(NR_PIXBLOCK_PX(result), 0, size);
if (fabs(trans[1]) > 1e-6 || fabs(trans[2]) > 1e-6) {
if (filterquality == FILTER_QUALITY_BEST) {
NR::transform_bicubic(result, final_usr, trans);
} else {
NR::transform_nearest(result, final_usr, trans);
}
} else if (fabs(trans[0] - 1) > 1e-6 || fabs(trans[3] - 1) > 1e-6) {
NR::scale_bicubic(result, final_usr);
} else {
nr_blit_pixblock_pixblock(result, final_usr);
}
}
NRPixBlock *filter_get_alpha(NRPixBlock *src)
{
NRPixBlock *dst = new NRPixBlock;
nr_pixblock_setup_fast(dst, NR_PIXBLOCK_MODE_R8G8B8A8P,
src->area.x0, src->area.y0,
src->area.x1, src->area.y1, false);
if (!dst || (dst->size != NR_PIXBLOCK_SIZE_TINY && dst->data.px == NULL)) {
g_warning("Memory allocation failed in filter_get_alpha");
delete dst;
return NULL;
}
nr_blit_pixblock_pixblock(dst, src);
unsigned char *data = NR_PIXBLOCK_PX(dst);
int end = dst->rs * (dst->area.y1 - dst->area.y0);
for (int i = 0 ; i < end ; i += 4) {
data[i + 0] = 0;
data[i + 1] = 0;
data[i + 2] = 0;
}
dst->empty = false;
return dst;
}
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);
}
}
}