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"
15 namespace NR {
17 FilterImage::FilterImage()
18 {
19 // Testing with hardcoded xlink:href :
20 image = Gdk::Pixbuf::create_from_file("../images/image1.jpg");
21 //TODO: handle errors
22 width = image->get_width()+1;
23 height = image->get_height()+1;
24 image_pixbuf = image->get_pixels();
25 }
27 FilterPrimitive * FilterImage::create() {
28 return new FilterImage();
29 }
31 FilterImage::~FilterImage()
32 {}
34 int FilterImage::render(FilterSlot &slot, Matrix const &trans) {
35 int w,x,y;
36 NRPixBlock *in = slot.get(_input);
37 NRPixBlock *out = new NRPixBlock;
39 int x0 = in->area.x0, y0 = in->area.y0;
40 int x1 = in->area.x1, y1 = in->area.y1;
41 int bbox_x0 = (int) slot.get_arenaitem()->bbox.x0;
42 int bbox_y0 = (int) slot.get_arenaitem()->bbox.y0;
44 nr_pixblock_setup_fast(out, in->mode, x0, y0, x1, y1, true);
46 w = x1 - x0;
47 double scaleX = width/feImageWidth;
48 double scaleY = height/feImageHeight;
49 int coordx,coordy;
50 unsigned char *out_data = NR_PIXBLOCK_PX(out);
51 for (x=x0; x < x1; x++){
52 for (y=y0; y < y1; y++){
53 //TODO: use interpolation
54 coordx = int((x - feImageX - bbox_x0)*scaleX);
55 coordy = int((y - feImageY - bbox_y0)*scaleY);
57 if (coordx > 0 && coordx < width && coordy > 0 && coordy < height){
58 out_data[4*((x - x0)+w*(y - y0))] = (unsigned char) image_pixbuf[3*(coordx + width*coordy)]; //Red
59 out_data[4*((x - x0)+w*(y - y0)) + 1] = (unsigned char) image_pixbuf[3*(coordx + width*coordy) + 1]; //Green
60 out_data[4*((x - x0)+w*(y - y0)) + 2] = (unsigned char) image_pixbuf[3*(coordx + width*coordy) + 2]; //Blue
61 out_data[4*((x - x0)+w*(y - y0)) + 3] = 255; //Alpha
62 }
63 }
64 }
66 out->empty = FALSE;
67 slot.set(_output, out);
68 return 0;
69 }
70 void FilterImage::set_region(SVGLength x, SVGLength y, SVGLength width, SVGLength height){
71 feImageX=x.computed;
72 feImageY=y.computed;
73 feImageWidth=width.computed;
74 feImageHeight=height.computed;
75 }
77 FilterTraits FilterImage::get_input_traits() {
78 return TRAIT_PARALLER;
79 }
81 } /* namespace NR */
83 /*
84 Local Variables:
85 mode:c++
86 c-file-style:"stroustrup"
87 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
88 indent-tabs-mode:nil
89 fill-column:99
90 End:
91 */
92 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :