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diff --git a/src/display/nr-filter-component-transfer.cpp b/src/display/nr-filter-component-transfer.cpp
index 9b20034022998ceabff5c74d13c0e8964b7c9c20..caf053bcf38026c75b7491bd2b6b472c52544c0b 100644 (file)
*
* Authors:
* Felipe Corrêa da Silva Sanches <felipe.sanches@gmail.com>
+ * Jasper van de Gronde <th.v.d.gronde@hccnet.nl>
*
* Copyright (C) 2007 authors
*
#include "display/nr-filter-component-transfer.h"
#include "display/nr-filter-units.h"
+#include "display/nr-filter-utils.h"
+#include "libnr/nr-pixblock.h"
+#include "libnr/nr-blit.h"
+#include "libnr/nr-pixops.h"
+#include <math.h>
namespace NR {
FilterComponentTransfer::FilterComponentTransfer()
{
- g_warning("FilterComponentTransfer::render not implemented.");
}
FilterPrimitive * FilterComponentTransfer::create() {
int FilterComponentTransfer::render(FilterSlot &slot, FilterUnits const &/*units*/) {
NRPixBlock *in = slot.get(_input);
+
if (!in) {
g_warning("Missing source image for feComponentTransfer (in=%d)", _input);
return 1;
}
- NRPixBlock *out = new NRPixBlock;
+ int x0=in->area.x0;
+ int x1=in->area.x1;
+ int y0=in->area.y0;
+ int y1=in->area.y1;
- nr_pixblock_setup_fast(out, in->mode,
- in->area.x0, in->area.y0, in->area.x1, in->area.y1,
- true);
+ NRPixBlock *out = new NRPixBlock;
+ nr_pixblock_setup_fast(out, NR_PIXBLOCK_MODE_R8G8B8A8N, x0, y0, x1, y1, true);
+
+ // this primitive is defined for non-premultiplied RGBA values,
+ // thus convert them to that format before blending
+ bool free_in_on_exit = false;
+ if (in->mode != NR_PIXBLOCK_MODE_R8G8B8A8N) {
+ NRPixBlock *original_in = in;
+ in = new NRPixBlock;
+ nr_pixblock_setup_fast(in, NR_PIXBLOCK_MODE_R8G8B8A8N,
+ original_in->area.x0, original_in->area.y0,
+ original_in->area.x1, original_in->area.y1,
+ false);
+ nr_blit_pixblock_pixblock(in, original_in);
+ free_in_on_exit = true;
+ }
unsigned char *in_data = NR_PIXBLOCK_PX(in);
unsigned char *out_data = NR_PIXBLOCK_PX(out);
-//IMPLEMENT ME!
- g_warning("Renderer for feComponentTransfer is not implemented.");
(void)in_data;
(void)out_data;
+ int size = 4 * (y1-y0) * (x1-x0);
+ int i;
+
+ for (int color=0;color<4;color++){
+ int _vsize = tableValues[color].size();
+ double _intercept = intercept[color];
+ double _slope = slope[color];
+ double _amplitude = amplitude[color];
+ double _exponent = exponent[color];
+ double _offset = offset[color];
+ switch(type[color]){
+ case COMPONENTTRANSFER_TYPE_IDENTITY:
+ for(i=color;i<size;i+=4){
+ out_data[i]=in_data[i];
+ }
+ break;
+ case COMPONENTTRANSFER_TYPE_TABLE:
+ if (_vsize<=1){
+ if (_vsize==1) {
+ g_warning("A component transfer table has to have at least two values.");
+ }
+ for(i=color;i<size;i+=4){
+ out_data[i]=in_data[i];
+ }
+ } else {
+ std::vector<gdouble> _tableValues(tableValues[color]);
+ // Scale by 255 and add .5 to avoid having to add it later for rounding purposes
+ for(i=0;i<_vsize;i++) {
+ _tableValues[i] = std::max(0.,std::min(255.,255*_tableValues[i])) + .5;
+ }
+ for(i=color;i<size;i+=4){
+ int k = FAST_DIVIDE<255>((_vsize-1) * in_data[i]);
+ double dx = ((_vsize-1) * in_data[i])/255.0 - k;
+ out_data[i] = static_cast<unsigned char>(_tableValues[k] + dx * (_tableValues[k+1] - _tableValues[k]));
+ }
+ }
+ break;
+ case COMPONENTTRANSFER_TYPE_DISCRETE:
+ if (_vsize==0){
+ for(i=color;i<size;i+=4){
+ out_data[i] = in_data[i];
+ }
+ } else {
+ std::vector<unsigned char> _tableValues(_vsize);
+ // Convert to unsigned char
+ for(i=0;i<_vsize;i++) {
+ _tableValues[i] = static_cast<unsigned char>(std::max(0.,std::min(255.,255*tableValues[color][i])) + .5);
+ }
+ for(i=color;i<size;i+=4){
+ int k = FAST_DIVIDE<255>((_vsize-1) * in_data[i]);
+ out_data[i] = _tableValues[k];
+ }
+ }
+ break;
+ case COMPONENTTRANSFER_TYPE_LINEAR:
+ _intercept = 255*_intercept + .5;
+ for(i=color;i<size;i+=4){
+ out_data[i] = CLAMP_D_TO_U8(_slope * in_data[i] + _intercept);
+ }
+ break;
+ case COMPONENTTRANSFER_TYPE_GAMMA:
+ _amplitude *= pow(255.0, -_exponent+1);
+ _offset = 255*_offset + .5;
+ for(i=color;i<size;i+=4){
+ out_data[i] = CLAMP_D_TO_U8(_amplitude * pow((double)in_data[i], _exponent) + _offset);
+ }
+ break;
+ case COMPONENTTRANSFER_TYPE_ERROR:
+ //TODO: report an error here
+ g_warning("Component tranfer type \"error\".");
+ break;
+ default:
+ g_warning("Invalid tranfer type %d.", type[color]);
+ }
+ }
+
+ if (free_in_on_exit) {
+ nr_pixblock_release(in);
+ delete in;
+ }
+
out->empty = FALSE;
slot.set(_output, out);
return 0;
}
-void FilterComponentTransfer::area_enlarge(NRRectL &/*area*/, Matrix const &/*trans*/)
+void FilterComponentTransfer::area_enlarge(NRRectL &/*area*/, Geom::Matrix const &/*trans*/)
{
}
-void FilterComponentTransfer::set_type(FilterComponentTransferType t){
- type = t;
-}
-
-void FilterComponentTransfer::set_slope(double s){
- slope = s;
-}
-
-void FilterComponentTransfer::set_tableValues(std::vector<double> &tv){
- tableValues = tv;
-}
-
-
-void FilterComponentTransfer::set_intercept(double i){
- intercept = i;
-}
-
-void FilterComponentTransfer::set_amplitude(double a){
- amplitude = a;
-}
-
-void FilterComponentTransfer::set_exponent(double e){
- exponent = e;
-}
-
-void FilterComponentTransfer::set_offset(double o){
- offset = o;
-}
-
} /* namespace NR */
/*