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 feImageHref=NULL;
21 image_pixbuf=NULL;
22 }
24 FilterPrimitive * FilterImage::create() {
25 return new FilterImage();
26 }
28 FilterImage::~FilterImage()
29 {
30 if (feImageHref) g_free(feImageHref);
31 if (image_pixbuf) g_free(image_pixbuf);
32 }
34 int FilterImage::render(FilterSlot &slot, FilterUnits const &/*units*/) {
35 if (!feImageHref) return 0;
37 if (!image_pixbuf){
38 if ( (image = Gdk::Pixbuf::create_from_file(feImageHref)) < 0 ) return 0;
39 width = image->get_width();
40 height = image->get_height();
41 rowstride = image->get_rowstride();
42 image_pixbuf = image->get_pixels();
43 }
44 int w,x,y;
45 NRPixBlock *in = slot.get(_input);
46 NRPixBlock *out = new NRPixBlock;
48 int x0 = in->area.x0, y0 = in->area.y0;
49 int x1 = in->area.x1, y1 = in->area.y1;
50 int bbox_x0 = (int) slot.get_arenaitem()->bbox.x0;
51 int bbox_y0 = (int) slot.get_arenaitem()->bbox.y0;
53 nr_pixblock_setup_fast(out, in->mode, x0, y0, x1, y1, true);
55 w = x1 - x0;
56 double scaleX = width/feImageWidth;
57 double scaleY = height/feImageHeight;
58 int coordx,coordy;
59 unsigned char *out_data = NR_PIXBLOCK_PX(out);
60 for (x=x0; x < x1; x++){
61 for (y=y0; y < y1; y++){
62 //TODO: use interpolation
63 coordx = int((x - feImageX - bbox_x0)*scaleX);
64 coordy = int((y - feImageY - bbox_y0)*scaleY);
66 if (coordx > 0 && coordx < width && coordy > 0 && coordy < height){
67 out_data[4*((x - x0)+w*(y - y0))] = (unsigned char) image_pixbuf[3*coordx + rowstride*coordy]; //Red
68 out_data[4*((x - x0)+w*(y - y0)) + 1] = (unsigned char) image_pixbuf[3*coordx + rowstride*coordy + 1]; //Green
69 out_data[4*((x - x0)+w*(y - y0)) + 2] = (unsigned char) image_pixbuf[3*coordx + rowstride*coordy + 2]; //Blue
70 out_data[4*((x - x0)+w*(y - y0)) + 3] = 255; //Alpha
71 }
72 }
73 }
75 out->empty = FALSE;
76 slot.set(_output, out);
77 return 0;
78 }
80 void FilterImage::set_href(const gchar *href){
81 if (feImageHref) g_free (feImageHref);
82 feImageHref = (href) ? g_strdup (href) : NULL;
83 }
85 void FilterImage::set_region(SVGLength x, SVGLength y, SVGLength width, SVGLength height){
86 feImageX=x.computed;
87 feImageY=y.computed;
88 feImageWidth=width.computed;
89 feImageHeight=height.computed;
90 }
92 FilterTraits FilterImage::get_input_traits() {
93 return TRAIT_PARALLER;
94 }
96 } /* namespace NR */
98 /*
99 Local Variables:
100 mode:c++
101 c-file-style:"stroustrup"
102 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
103 indent-tabs-mode:nil
104 fill-column:99
105 End:
106 */
107 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :