![[tokkee]](http://tokkee.org/images/avatar.png){kind=avatar}
index 74c229109ebbd6ae8793e6e3f8a6c1004eb766f2..3fd577309241ac458ac14e9cb0f8d7dacbbb5fc8 100644 (file)
* feTurbulence filter primitive renderer
*
* Authors:
+ * World Wide Web Consortium <http://www.w3.org/>
* Felipe Corrêa da Silva Sanches <felipe.sanches@gmail.com>
*
- * Copyright (C) 2007 authors
+ * This file has a considerable amount of code adapted from
+ * the W3C SVG filter specs, available at:
+ * http://www.w3.org/TR/SVG11/filters.html#feTurbulence
+ *
+ * W3C original code is licensed under the terms of
+ * the (GPL compatible) W3C® SOFTWARE NOTICE AND LICENSE:
+ * http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231
*
+ * Copyright (C) 2007 authors
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include "display/nr-filter-units.h"
#include "display/nr-filter-utils.h"
#include "libnr/nr-rect-l.h"
+#include "libnr/nr-blit.h"
#include <math.h>
namespace NR {
updated=u;
}
-void FilterTurbulence::update_pixbuffer(FilterSlot &/*slot*/, IRect &area) {
-//g_warning("update_pixbuf");
+void FilterTurbulence::render_area(NRPixBlock *pix, IRect &full_area, FilterUnits const &units) {
+ const int bbox_x0 = full_area.min()[X];
+ const int bbox_y0 = full_area.min()[Y];
+ const int bbox_x1 = full_area.max()[X];
+ const int bbox_y1 = full_area.max()[Y];
+
+ Matrix unit_trans = units.get_matrix_primitiveunits2pb().inverse();
+
+ double point[2];
+
+ unsigned char *pb = NR_PIXBLOCK_PX(pix);
+
+ if (type==TURBULENCE_TURBULENCE){
+ for (int y = std::max(bbox_y0, pix->area.y0); y < std::min(bbox_y1, pix->area.y1); y++){
+ int out_line = (y - pix->area.y0) * pix->rs;
+ point[1] = y * unit_trans[3] + unit_trans[5];
+ for (int x = std::max(bbox_x0, pix->area.x0); x < std::min(bbox_x1, pix->area.x1); x++){
+ int out_pos = out_line + 4 * (x - pix->area.x0);
+ point[0] = x * unit_trans[0] + unit_trans[4];
+ pb[out_pos] = CLAMP_D_TO_U8( turbulence(0,point)*255 );
+ pb[out_pos + 1] = CLAMP_D_TO_U8( turbulence(1,point)*255 );
+ pb[out_pos + 2] = CLAMP_D_TO_U8( turbulence(2,point)*255 );
+ pb[out_pos + 3] = CLAMP_D_TO_U8( turbulence(3,point)*255 );
+ }
+ }
+ } else {
+ for (int y = std::max(bbox_y0, pix->area.y0); y < std::min(bbox_y1, pix->area.y1); y++){
+ int out_line = (y - pix->area.y0) * pix->rs;
+ point[1] = y * unit_trans[3] + unit_trans[5];
+ for (int x = std::max(bbox_x0, pix->area.x0); x < std::min(bbox_x1, pix->area.x1); x++){
+ int out_pos = out_line + 4 * (x - pix->area.x0);
+ point[0] = x * unit_trans[0] + unit_trans[4];
+ pb[out_pos] = CLAMP_D_TO_U8( ((turbulence(0,point)*255) +255)/2 );
+ pb[out_pos + 1] = CLAMP_D_TO_U8( ((turbulence(1,point)*255)+255)/2 );
+ pb[out_pos + 2] = CLAMP_D_TO_U8( ((turbulence(2,point)*255) +255)/2 );
+ pb[out_pos + 3] = CLAMP_D_TO_U8( ((turbulence(3,point)*255) +255)/2 );
+ }
+ }
+ }
+
+ pix->empty = FALSE;
+}
+
+void FilterTurbulence::update_pixbuffer(IRect &area, FilterUnits const &units) {
int bbox_x0 = area.min()[X];
int bbox_y0 = area.min()[Y];
int bbox_x1 = area.max()[X];
int bbox_y1 = area.max()[Y];
- int w = bbox_x1 - bbox_x0;
- int h = bbox_y1 - bbox_y0;
+ TurbulenceInit((long)seed);
if (!pix){
pix = new NRPixBlock;
nr_pixblock_setup_fast(pix, NR_PIXBLOCK_MODE_R8G8B8A8N, bbox_x0, bbox_y0, bbox_x1, bbox_y1, true);
}
- if (!pix || (pix->size != NR_PIXBLOCK_SIZE_TINY && pix->data.px == NULL)) {
- /* TODO: Should render the visible area or something instead. */
- g_warning("Unable to reserve image buffer for feTurbulence");
+ /* This limits pre-rendered turbulence to two megapixels. This is
+ * arbitary limit and could be something other, too.
+ * If bigger area is needed, visible area is rendered on demand. */
+ if (!pix || (pix->size != NR_PIXBLOCK_SIZE_TINY && pix->data.px == NULL) ||
+ ((bbox_x1 - bbox_x0) * (bbox_y1 - bbox_y0) > 2*1024*1024)) {
pix_data = NULL;
return;
}
- pix_data = NR_PIXBLOCK_PX(pix);
-
- TurbulenceInit((long)seed);
-
- double point[2];
+ render_area(pix, area, units);
- if (type==TURBULENCE_TURBULENCE){
- for (point[0]=0; point[0] < w; point[0]++){
- for (point[1]=0; point[1] < h; point[1]++){
- pix_data[4*(int(point[0]) + w*int(point[1]))] = CLAMP_D_TO_U8( turbulence(0,point)*255 );
- pix_data[4*(int(point[0]) + w*int(point[1])) + 1] = CLAMP_D_TO_U8( turbulence(1,point)*255 );
- pix_data[4*(int(point[0]) + w*int(point[1])) + 2] = CLAMP_D_TO_U8( turbulence(2,point)*255 );
- pix_data[4*(int(point[0]) + w*int(point[1])) + 3] = CLAMP_D_TO_U8( turbulence(3,point)*255 );
- }
- }
- } else {
- for (point[0]=0; point[0] < w; point[0]++){
- for (point[1]=0; point[1] < h; point[1]++){
- pix_data[4*(int(point[0]) + w*int(point[1]))] = CLAMP_D_TO_U8( ((turbulence(0,point)*255) +255)/2 );
- pix_data[4*(int(point[0]) + w*int(point[1])) + 1] = CLAMP_D_TO_U8( ((turbulence(1,point)*255)+255)/2 );
- pix_data[4*(int(point[0]) + w*int(point[1])) + 2] = CLAMP_D_TO_U8( ((turbulence(2,point)*255) +255)/2 );
- pix_data[4*(int(point[0]) + w*int(point[1])) + 3] = CLAMP_D_TO_U8( ((turbulence(3,point)*255) +255)/2 );
- }
- }
- }
+ pix_data = NR_PIXBLOCK_PX(pix);
+
updated=true;
updated_area = area;
}
int FilterTurbulence::render(FilterSlot &slot, FilterUnits const &units) {
-//g_warning("render");
IRect area = units.get_pixblock_filterarea_paraller();
// TODO: could be faster - updated_area only has to be same size as area
- if (!updated || updated_area != area) update_pixbuffer(slot, area);
- if (!pix_data) {
- /* update_pixbuffer couldn't render the turbulence */
- return 1;
- }
+ if (!updated || updated_area != area) update_pixbuffer(area, units);
+
NRPixBlock *in = slot.get(_input);
if (!in) {
g_warning("Missing source image for feTurbulence (in=%d)", _input);
return 1;
}
- NRPixBlock *out = new NRPixBlock;
- int x,y;
+ NRPixBlock *out = new NRPixBlock;
int x0 = in->area.x0, y0 = in->area.y0;
int x1 = in->area.x1, y1 = in->area.y1;
- int w = x1 - x0;
nr_pixblock_setup_fast(out, NR_PIXBLOCK_MODE_R8G8B8A8N, x0, y0, x1, y1, true);
- int bbox_x0 = area.min()[X];
- int bbox_y0 = area.min()[Y];
- int bbox_x1 = area.max()[X];
- int bbox_y1 = area.max()[Y];
- int bbox_w = bbox_x1 - bbox_x0;
-
- unsigned char *out_data = NR_PIXBLOCK_PX(out);
- for (x = std::max(x0, bbox_x0); x < std::min(x1, bbox_x1); x++){
- for (y = std::max(y0, bbox_y0); y < std::min(y1, bbox_y1); y++){
- out_data[4*((x - x0)+w*(y - y0))] = pix_data[4*(x - bbox_x0 + bbox_w*(y - bbox_y0)) ];
- out_data[4*((x - x0)+w*(y - y0)) + 1] = pix_data[4*(x - bbox_x0 + bbox_w*(y - bbox_y0))+1];
- out_data[4*((x - x0)+w*(y - y0)) + 2] = pix_data[4*(x - bbox_x0 + bbox_w*(y - bbox_y0))+2];
- out_data[4*((x - x0)+w*(y - y0)) + 3] = pix_data[4*(x - bbox_x0 + bbox_w*(y - bbox_y0))+3];
- }
+ if (pix_data) {
+ /* If pre-rendered output of whole filter area exists, just copy it. */
+ nr_blit_pixblock_pixblock(out, pix);
+ } else {
+ /* No pre-rendered output, render the required area here. */
+ render_area(out, area, units);
}
+
out->empty = FALSE;
slot.set(_output, out);
return 0;
void FilterTurbulence::TurbulenceInit(long lSeed)
{
-//g_warning("init");
double s;
int i, j, k;
lSeed = Turbulence_setup_seed(lSeed);
@@ -270,7 +287,6 @@ double FilterTurbulence::TurbulenceNoise2(int nColorChannel, double vec[2], Stit
double FilterTurbulence::turbulence(int nColorChannel, double *point)
{
-//g_warning("turbulence");
StitchInfo stitch;
StitchInfo *pStitchInfo = NULL; // Not stitching when NULL.
// Adjust the base frequencies if necessary for stitching.