1 /*
2 * feColorMatrix filter primitive renderer
3 *
4 * Authors:
5 * Felipe CorrĂȘa da Silva Sanches <felipe.sanches@gmail.com>
6 *
7 * Copyright (C) 2007 authors
8 *
9 * Released under GNU GPL, read the file 'COPYING' for more information
10 */
12 #include "display/nr-filter-colormatrix.h"
13 #include "display/nr-filter-units.h"
14 #include "display/nr-filter-utils.h"
15 #include "libnr/nr-blit.h"
16 #include <math.h>
18 namespace NR {
20 FilterColorMatrix::FilterColorMatrix()
21 {
22 }
24 FilterPrimitive * FilterColorMatrix::create() {
25 return new FilterColorMatrix();
26 }
28 FilterColorMatrix::~FilterColorMatrix()
29 {}
31 int FilterColorMatrix::render(FilterSlot &slot, FilterUnits const &/*units*/) {
32 NRPixBlock *in = slot.get(_input);
33 if (!in) {
34 g_warning("Missing source image for feColorMatrix (in=%d)", _input);
35 return 1;
36 }
38 NRPixBlock *out = new NRPixBlock;
40 nr_pixblock_setup_fast(out, NR_PIXBLOCK_MODE_R8G8B8A8N,
41 in->area.x0, in->area.y0, in->area.x1, in->area.y1,
42 true);
44 // this primitive is defined for non-premultiplied RGBA values,
45 // thus convert them to that format
46 bool free_in_on_exit = false;
47 if (in->mode != NR_PIXBLOCK_MODE_R8G8B8A8N) {
48 NRPixBlock *original_in = in;
49 in = new NRPixBlock;
50 nr_pixblock_setup_fast(in, NR_PIXBLOCK_MODE_R8G8B8A8N,
51 original_in->area.x0, original_in->area.y0,
52 original_in->area.x1, original_in->area.y1,
53 true);
54 nr_blit_pixblock_pixblock(in, original_in);
55 free_in_on_exit = true;
56 }
58 unsigned char *in_data = NR_PIXBLOCK_PX(in);
59 unsigned char *out_data = NR_PIXBLOCK_PX(out);
60 unsigned char r,g,b,a;
61 int x,y,x0,y0,x1,y1,i;
62 double a00,a01,a02,a10,a11,a12,a20,a21,a22, coshue, sinhue;
63 x0=in->area.x0;
64 y0=in->area.y0;
65 x1=in->area.x1;
66 y1=in->area.y1;
68 switch(type){
69 case COLORMATRIX_MATRIX:
70 if (values.size()!=20) {
71 g_warning("ColorMatrix: values parameter error. Wrong size: %i.", static_cast<int>(values.size()));
72 return -1;
73 }
74 for (x=x0;x<x1;x++){
75 for (y=y0;y<y1;y++){
76 i = ((x-x0) + (x1-x0)*(y-y0))*4;
77 r = in_data[i];
78 g = in_data[i+1];
79 b = in_data[i+2];
80 a = in_data[i+3];
81 out_data[i] = CLAMP_D_TO_U8( r*values[0] + g*values[1] + b*values[2] + a*values[3] + 255*values[4] );
82 out_data[i+1] = CLAMP_D_TO_U8( r*values[5] + g*values[6] + b*values[7] + a*values[8] + 255*values[9] );
83 out_data[i+2] = CLAMP_D_TO_U8( r*values[10] + g*values[11] + b*values[12] + a*values[13] + 255*values[14] );
84 out_data[i+3] = CLAMP_D_TO_U8( r*values[15] + g*values[16] + b*values[17] + a*values[18] + 255*values[19] );
85 }
86 }
87 break;
88 case COLORMATRIX_SATURATE:
89 for (x=x0;x<x1;x++){
90 for (y=y0;y<y1;y++){
91 i = ((x-x0) + (x1-x0)*(y-y0))*4;
92 r = in_data[i];
93 g = in_data[i+1];
94 b = in_data[i+2];
95 a = in_data[i+3];
96 out_data[i] = CLAMP_D_TO_U8( r*(0.213+0.787*value) + g*(0.715-0.715*value) + b*(0.072-0.072*value) );
97 out_data[i+1] = CLAMP_D_TO_U8( r*(0.213-0.213*value) + g*(0.715+0.285*value) + b*(0.072-0.072*value) );
98 out_data[i+2] = CLAMP_D_TO_U8( r*(0.213-0.213*value) + g*(0.715-0.715*value) + b*(0.072+0.928*value) );
99 out_data[i+3] = a;
100 }
101 }
102 break;
103 case COLORMATRIX_HUEROTATE:
104 coshue = cos(value * M_PI/180.0);
105 sinhue = sin(value * M_PI/180.0);
106 a00 = 0.213 + coshue*( 0.787) + sinhue*(-0.213);
107 a01 = 0.715 + coshue*(-0.715) + sinhue*(-0.715);
108 a02 = 0.072 + coshue*(-0.072) + sinhue*( 0.928);
109 a10 = 0.213 + coshue*(-0.213) + sinhue*( 0.143);
110 a11 = 0.715 + coshue*( 0.285) + sinhue*( 0.140);
111 a12 = 0.072 + coshue*(-0.072) + sinhue*(-0.283);
112 a20 = 0.213 + coshue*(-0.213) + sinhue*(-0.787);
113 a21 = 0.715 + coshue*(-0.715) + sinhue*( 0.715);
114 a22 = 0.072 + coshue*( 0.928) + sinhue*( 0.072);
116 for (x=x0;x<x1;x++){
117 for (y=y0;y<y1;y++){
118 i = ((x-x0) + (x1-x0)*(y-y0))*4;
119 r = in_data[i];
120 g = in_data[i+1];
121 b = in_data[i+2];
122 a = in_data[i+3];
124 out_data[i] = CLAMP_D_TO_U8( r*a00 + g*a01 + b*a02 );
125 out_data[i+1] = CLAMP_D_TO_U8( r*a10 + g*a11 + b*a12 );
126 out_data[i+2] = CLAMP_D_TO_U8( r*a20 + g*a21 + b*a22 );
127 out_data[i+3] = a;
128 }
129 }
130 break;
131 case COLORMATRIX_LUMINANCETOALPHA:
132 for (x=x0;x<x1;x++){
133 for (y=y0;y<y1;y++){
134 i = ((x-x0) + (x1-x0)*(y-y0))*4;
135 r = in_data[i];
136 g = in_data[i+1];
137 b = in_data[i+2];
138 out_data[i] = 0;
139 out_data[i+1] = 0;
140 out_data[i+2] = 0;
141 out_data[i+3] = CLAMP_D_TO_U8( r*0.2125 + g*0.7154 + b*0.0721);
142 }
143 }
144 break;
145 case COLORMATRIX_ENDTYPE:
146 break;
147 }
149 if (free_in_on_exit) {
150 nr_pixblock_release(in);
151 delete in;
152 }
154 out->empty = FALSE;
155 slot.set(_output, out);
156 return 0;
157 }
159 void FilterColorMatrix::area_enlarge(NRRectL &/*area*/, Geom::Matrix const &/*trans*/)
160 {
161 }
163 void FilterColorMatrix::set_type(FilterColorMatrixType t){
164 type = t;
165 }
167 void FilterColorMatrix::set_value(gdouble v){
168 value = v;
169 }
171 void FilterColorMatrix::set_values(std::vector<gdouble> &v){
172 values = v;
173 }
175 } /* namespace NR */
177 /*
178 Local Variables:
179 mode:c++
180 c-file-style:"stroustrup"
181 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
182 indent-tabs-mode:nil
183 fill-column:99
184 End:
185 */
186 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :