Project::OSiRiON - Git repositories
Project::OSiRiON
News . About . Screenshots . Downloads . Forum . Wiki . Tracker . Git
summaryrefslogtreecommitdiff
blob: 196eec946de2d33e5f77fff2c91a71e812f489e0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
/*
   render/image.cc
   This file is part of the Osirion project and is distributed under 
   the terms of the GNU General Public License version 2 
*/

#include <stdlib.h>
#include <string.h>

#include "render/image.h"

namespace render 
{

Image::Image(unsigned int width, unsigned int height, unsigned int channels)
{
	image_width = width;
	image_height = height;
	image_channels = channels;

	image_data = (unsigned char *) malloc(size());
	clear();
}

Image::~Image()
{
	free(image_data);
}

void Image::clear()
{
	memset(image_data, 0, size());
}

void Image::swap_channels()
{
	for (size_t y =0; y < image_height; y++) {
		for (size_t x = 0; x < image_width; x++) {
			size_t offset = y * image_width * image_channels + x * image_channels;
			unsigned char tmp = image_data[offset];
			image_data[offset] = image_data[offset + 2];
			image_data[offset + 2] = tmp;
		}
	}
}

void Image::pad()
{
	unsigned int w = width();
	unsigned int h = height();

	if ((w % 8) != 0) {
		image_width = w + (8 - (w % 8));
	}
	
	if ((w % 8) != 0) {
		image_height = h + (8 - (h % 8));
	}

	unsigned char *image_new = (unsigned char *) malloc(size());
	memset(image_new, 0, size());

	for (size_t y =0; y < h; y++) {
		memcpy((void *)&image_new[y * image_width * image_channels],
			(void *)&image_data[y * w * image_channels], (size_t) w);
	}

	free(image_data);
	image_data = image_new;
}

void Image::flip()
{
	unsigned char line[image_width*image_channels];
	for (size_t y=0; y < image_height /2; y++) {
		memcpy(line,
			&image_data[y*image_width*image_channels],
			image_width*image_channels);
		memcpy(&image_data[y*image_width*image_channels],
			&image_data[(image_height-1-y)*image_width*image_channels],
			image_width*image_channels);
		memcpy(&image_data[(image_height-1-y)*image_width*image_channels],
			line,
			image_width*image_channels);
	}
}

}