1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/image.cc	Sat Feb 01 19:58:19 2014 +0200
     1.3 @@ -0,0 +1,272 @@
     1.4 +#include <string.h>
     1.5 +
     1.6 +#ifndef _MSC_VER
     1.7 +#include <alloca.h>
     1.8 +#else
     1.9 +#include <malloc.h>
    1.10 +#endif
    1.11 +
    1.12 +#include "imago2.h"
    1.13 +#include "image.h"
    1.14 +#include "logger.h"
    1.15 +
    1.16 +static int pixel_elements(Image::Format fmt);
    1.17 +static int elem_size(Image::Format fmt);
    1.18 +static int pixel_size(Image::Format fmt);
    1.19 +
    1.20 +Image::Image()
    1.21 +{
    1.22 +	fmt = FMT_RGBA;
    1.23 +	width = height = 0;
    1.24 +	pixels = 0;
    1.25 +}
    1.26 +
    1.27 +Image::~Image()
    1.28 +{
    1.29 +	delete [] (char*)pixels;
    1.30 +}
    1.31 +
    1.32 +int Image::get_width() const
    1.33 +{
    1.34 +	return width;
    1.35 +}
    1.36 +
    1.37 +int Image::get_height() const
    1.38 +{
    1.39 +	return height;
    1.40 +}
    1.41 +
    1.42 +Image::Format Image::get_format() const
    1.43 +{
    1.44 +	return fmt;
    1.45 +}
    1.46 +
    1.47 +bool Image::create(int x, int y, Format fmt)
    1.48 +{
    1.49 +	width = x;
    1.50 +	height = y;
    1.51 +	this->fmt = fmt;
    1.52 +
    1.53 +	try {
    1.54 +		pixels = new char[x * y * pixel_size(fmt)];
    1.55 +	}
    1.56 +	catch(...) {
    1.57 +		return false;
    1.58 +	}
    1.59 +	return true;
    1.60 +}
    1.61 +
    1.62 +bool Image::set_pixels(int xsz, int ysz, void *pixels, Format fmt)
    1.63 +{
    1.64 +	if(!create(xsz, ysz, fmt)) {
    1.65 +		return false;
    1.66 +	}
    1.67 +	memcpy(this->pixels, pixels, xsz * ysz * pixel_size(fmt));
    1.68 +	return true;
    1.69 +}
    1.70 +
    1.71 +bool Image::set_pixels(int xsz, int ysz, void *pixels, int scan_width, Format fmt)
    1.72 +{
    1.73 +	return set_pixels(xsz, ysz, pixels, 0, 0, scan_width, fmt);
    1.74 +}
    1.75 +
    1.76 +bool Image::set_pixels(int xsz, int ysz, void *pixels, int x, int y, int scan_width, Format fmt)
    1.77 +{
    1.78 +	if(scan_width <= 0) {
    1.79 +		scan_width = xsz;
    1.80 +	}
    1.81 +
    1.82 +	if(!create(xsz, ysz, fmt)) {
    1.83 +		return false;
    1.84 +	}
    1.85 +
    1.86 +	int pixsz = pixel_size(fmt);
    1.87 +
    1.88 +	unsigned char *dest = (unsigned char*)this->pixels;
    1.89 +	unsigned char *src = (unsigned char*)pixels + (y * scan_width + x) * pixsz;
    1.90 +	for(int i=0; i<ysz; i++) {
    1.91 +		memcpy(dest, src, xsz * pixsz);
    1.92 +		dest += xsz * pixsz;
    1.93 +		src += scan_width * pixsz;
    1.94 +	}
    1.95 +	return true;
    1.96 +}
    1.97 +
    1.98 +void *Image::get_pixels() const
    1.99 +{
   1.100 +	return pixels;
   1.101 +}
   1.102 +
   1.103 +void Image::flip_horizontal()
   1.104 +{
   1.105 +	int pixsz = pixel_size(fmt);
   1.106 +
   1.107 +	unsigned char *tmppix = (unsigned char*)alloca(pixsz);
   1.108 +
   1.109 +	unsigned char *scan = (unsigned char*)pixels;
   1.110 +	for(int i=0; i<height; i++) {
   1.111 +		unsigned char *dest = scan;
   1.112 +		unsigned char *src = scan + (width - 1) * pixsz;
   1.113 +
   1.114 +		while(src > dest) {
   1.115 +			memcpy(tmppix, src, pixsz);
   1.116 +			memcpy(src, dest, pixsz);
   1.117 +			memcpy(dest, tmppix, pixsz);
   1.118 +			dest += pixsz;
   1.119 +			src -= pixsz;
   1.120 +		}
   1.121 +
   1.122 +		scan += width * pixsz;
   1.123 +	}
   1.124 +}
   1.125 +
   1.126 +void Image::flip_vertical()
   1.127 +{
   1.128 +	int pixsz = pixel_size(fmt);
   1.129 +
   1.130 +	unsigned char *tmpscan = (unsigned char*)alloca(width * pixsz);
   1.131 +
   1.132 +	unsigned char *dest = (unsigned char*)pixels;
   1.133 +	unsigned char *src = (unsigned char*)pixels + (height - 1) * width * pixsz;
   1.134 +
   1.135 +	while(src > dest) {
   1.136 +		memcpy(tmpscan, src, width * pixsz);
   1.137 +		memcpy(src, dest, width * pixsz);
   1.138 +		memcpy(dest, tmpscan, width * pixsz);
   1.139 +		dest += width * pixsz;
   1.140 +		src -= width * pixsz;
   1.141 +	}
   1.142 +}
   1.143 +
   1.144 +void Image::rotate_180()
   1.145 +{
   1.146 +	flip_vertical();
   1.147 +	flip_horizontal();
   1.148 +}
   1.149 +
   1.150 +bool Image::load(const char *fname)
   1.151 +{
   1.152 +	struct img_pixmap pixmap;
   1.153 +
   1.154 +	img_init(&pixmap);
   1.155 +	if(img_load(&pixmap, fname) == -1) {
   1.156 +		return false;
   1.157 +	}
   1.158 +
   1.159 +	Format fmt;
   1.160 +	switch(pixmap.fmt) {
   1.161 +	case IMG_FMT_GREY8:
   1.162 +		fmt = FMT_GREY;
   1.163 +		break;
   1.164 +	case IMG_FMT_RGB24:
   1.165 +		fmt = FMT_RGB;
   1.166 +		break;
   1.167 +	case IMG_FMT_RGBA32:
   1.168 +		fmt = FMT_RGBA;
   1.169 +		break;
   1.170 +	case IMG_FMT_GREYF:
   1.171 +		fmt = FMT_GREY_FLOAT;
   1.172 +		break;
   1.173 +	case IMG_FMT_RGBF:
   1.174 +		fmt = FMT_RGB_FLOAT;
   1.175 +		break;
   1.176 +	case IMG_FMT_RGBAF:
   1.177 +		fmt = FMT_RGBA_FLOAT;
   1.178 +		break;
   1.179 +	default:
   1.180 +		img_destroy(&pixmap);
   1.181 +		return false;
   1.182 +	}
   1.183 +
   1.184 +	if(!set_pixels(pixmap.width, pixmap.height, pixmap.pixels, fmt)) {
   1.185 +		img_destroy(&pixmap);
   1.186 +		return false;
   1.187 +	}
   1.188 +	img_destroy(&pixmap);
   1.189 +	return true;
   1.190 +}
   1.191 +
   1.192 +bool Image::save(const char *fname) const
   1.193 +{
   1.194 +	struct img_pixmap pixmap;
   1.195 +
   1.196 +	img_init(&pixmap);
   1.197 +
   1.198 +	switch(fmt) {
   1.199 +	case FMT_GREY:
   1.200 +		pixmap.fmt = IMG_FMT_GREY8;
   1.201 +		break;
   1.202 +	case FMT_GREY_FLOAT:
   1.203 +		pixmap.fmt = IMG_FMT_GREYF;
   1.204 +		break;
   1.205 +	case FMT_RGB:
   1.206 +		pixmap.fmt = IMG_FMT_RGB24;
   1.207 +		break;
   1.208 +	case FMT_RGB_FLOAT:
   1.209 +		pixmap.fmt = IMG_FMT_RGBF;
   1.210 +		break;
   1.211 +	case FMT_RGBA:
   1.212 +		pixmap.fmt = IMG_FMT_RGBA32;
   1.213 +		break;
   1.214 +	case FMT_RGBA_FLOAT:
   1.215 +		pixmap.fmt = IMG_FMT_RGBAF;
   1.216 +		break;
   1.217 +	default:
   1.218 +		return false;
   1.219 +	}
   1.220 +
   1.221 +	pixmap.width = width;
   1.222 +	pixmap.height = height;
   1.223 +	pixmap.pixels = pixels;
   1.224 +	pixmap.pixelsz = pixel_size(fmt);
   1.225 +
   1.226 +	if(img_save(&pixmap, fname) == -1) {
   1.227 +		return false;
   1.228 +	}
   1.229 +	return true;
   1.230 +}
   1.231 +
   1.232 +static int pixel_elements(Image::Format fmt)
   1.233 +{
   1.234 +	switch(fmt) {
   1.235 +	case Image::FMT_GREY:
   1.236 +	case Image::FMT_GREY_FLOAT:
   1.237 +		return 1;
   1.238 +
   1.239 +	case Image::FMT_RGB:
   1.240 +	case Image::FMT_RGB_FLOAT:
   1.241 +		return 3;
   1.242 +
   1.243 +	case Image::FMT_RGBA:
   1.244 +	case Image::FMT_RGBA_FLOAT:
   1.245 +		return 4;
   1.246 +
   1.247 +	default:
   1.248 +		break;
   1.249 +	}
   1.250 +	return 0;
   1.251 +}
   1.252 +
   1.253 +static int elem_size(Image::Format fmt)
   1.254 +{
   1.255 +	switch(fmt) {
   1.256 +	case Image::FMT_GREY:
   1.257 +	case Image::FMT_RGB:
   1.258 +	case Image::FMT_RGBA:
   1.259 +		return 1;
   1.260 +
   1.261 +	case Image::FMT_GREY_FLOAT:
   1.262 +	case Image::FMT_RGB_FLOAT:
   1.263 +	case Image::FMT_RGBA_FLOAT:
   1.264 +		return sizeof(float);
   1.265 +
   1.266 +	default:
   1.267 +		break;
   1.268 +	}
   1.269 +	return 0;
   1.270 +}
   1.271 +
   1.272 +static int pixel_size(Image::Format fmt)
   1.273 +{
   1.274 +	return elem_size(fmt) * pixel_elements(fmt);
   1.275 +}