1 /*
2 * feImage 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 */
11 #include "display/nr-arena-item.h"
12 #include "display/nr-filter.h"
13 #include "display/nr-filter-image.h"
14 #include "display/nr-filter-units.h"
16 namespace NR {
18 FilterImage::FilterImage()
19 {
20 // Testing with hardcoded xlink:href :
21 image = Gdk::Pixbuf::create_from_file("../images/image1.jpg");
22 //TODO: handle errors
23 width = image->get_width()+1;
24 height = image->get_height()+1;
25 image_pixbuf = image->get_pixels();
26 }
28 FilterPrimitive * FilterImage::create() {
29 return new FilterImage();
30 }
32 FilterImage::~FilterImage()
33 {}
35 int FilterImage::render(FilterSlot &slot, FilterUnits const &units) {
36 int w,x,y;
37 NRPixBlock *in = slot.get(_input);
38 NRPixBlock *out = new NRPixBlock;
40 int x0 = in->area.x0, y0 = in->area.y0;
41 int x1 = in->area.x1, y1 = in->area.y1;
42 int bbox_x0 = (int) slot.get_arenaitem()->bbox.x0;
43 int bbox_y0 = (int) slot.get_arenaitem()->bbox.y0;
45 nr_pixblock_setup_fast(out, in->mode, x0, y0, x1, y1, true);
47 w = x1 - x0;
48 double scaleX = width/feImageWidth;
49 double scaleY = height/feImageHeight;
50 int coordx,coordy;
51 unsigned char *out_data = NR_PIXBLOCK_PX(out);
52 for (x=x0; x < x1; x++){
53 for (y=y0; y < y1; y++){
54 //TODO: use interpolation
55 coordx = int((x - feImageX - bbox_x0)*scaleX);
56 coordy = int((y - feImageY - bbox_y0)*scaleY);
58 if (coordx > 0 && coordx < width && coordy > 0 && coordy < height){
59 out_data[4*((x - x0)+w*(y - y0))] = (unsigned char) image_pixbuf[3*(coordx + width*coordy)]; //Red
60 out_data[4*((x - x0)+w*(y - y0)) + 1] = (unsigned char) image_pixbuf[3*(coordx + width*coordy) + 1]; //Green
61 out_data[4*((x - x0)+w*(y - y0)) + 2] = (unsigned char) image_pixbuf[3*(coordx + width*coordy) + 2]; //Blue
62 out_data[4*((x - x0)+w*(y - y0)) + 3] = 255; //Alpha
63 }
64 }
65 }
67 out->empty = FALSE;
68 slot.set(_output, out);
69 return 0;
70 }
71 void FilterImage::set_region(SVGLength x, SVGLength y, SVGLength width, SVGLength height){
72 feImageX=x.computed;
73 feImageY=y.computed;
74 feImageWidth=width.computed;
75 feImageHeight=height.computed;
76 }
78 FilterTraits FilterImage::get_input_traits() {
79 return TRAIT_PARALLER;
80 }
82 } /* namespace NR */
84 /*
85 Local Variables:
86 mode:c++
87 c-file-style:"stroustrup"
88 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
89 indent-tabs-mode:nil
90 fill-column:99
91 End:
92 */
93 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :