1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/image.cc	Thu Nov 14 05:27:09 2013 +0200
     1.3 @@ -0,0 +1,192 @@
     1.4 +#include <string.h>
     1.5 +#include "imago2.h"
     1.6 +#include "image.h"
     1.7 +#include "logger.h"
     1.8 +
     1.9 +
    1.10 +static int pixel_elements(Image::Format fmt);
    1.11 +static int elem_size(Image::Format fmt);
    1.12 +static int pixel_size(Image::Format fmt);
    1.13 +
    1.14 +Image::Image()
    1.15 +{
    1.16 +	fmt = FMT_RGBA;
    1.17 +	width = height = 0;
    1.18 +	pixels = 0;
    1.19 +}
    1.20 +
    1.21 +Image::~Image()
    1.22 +{
    1.23 +	delete [] (char*)pixels;
    1.24 +}
    1.25 +
    1.26 +int Image::get_width() const
    1.27 +{
    1.28 +	return width;
    1.29 +}
    1.30 +
    1.31 +int Image::get_height() const
    1.32 +{
    1.33 +	return height;
    1.34 +}
    1.35 +
    1.36 +Image::Format Image::get_format() const
    1.37 +{
    1.38 +	return fmt;
    1.39 +}
    1.40 +
    1.41 +bool Image::create(int x, int y, Format fmt)
    1.42 +{
    1.43 +	width = x;
    1.44 +	height = y;
    1.45 +	this->fmt = fmt;
    1.46 +
    1.47 +	try {
    1.48 +		pixels = new char[x * y * pixel_size(fmt)];
    1.49 +	}
    1.50 +	catch(...) {
    1.51 +		return false;
    1.52 +	}
    1.53 +	return true;
    1.54 +}
    1.55 +
    1.56 +bool Image::set_pixels(int x, int y, void *pixels, Format fmt)
    1.57 +{
    1.58 +	if(!create(x, y, fmt)) {
    1.59 +		return false;
    1.60 +	}
    1.61 +	memcpy(this->pixels, pixels, x * y * pixel_size(fmt));
    1.62 +	return true;
    1.63 +}
    1.64 +
    1.65 +void *Image::get_pixels() const
    1.66 +{
    1.67 +	return pixels;
    1.68 +}
    1.69 +
    1.70 +bool Image::load(const char *fname)
    1.71 +{
    1.72 +	struct img_pixmap pixmap;
    1.73 +
    1.74 +	img_init(&pixmap);
    1.75 +	if(img_load(&pixmap, fname) == -1) {
    1.76 +		return false;
    1.77 +	}
    1.78 +
    1.79 +	Format fmt;
    1.80 +	switch(pixmap.fmt) {
    1.81 +	case IMG_FMT_GREY8:
    1.82 +		fmt = FMT_GREY;
    1.83 +		break;
    1.84 +	case IMG_FMT_RGB24:
    1.85 +		fmt = FMT_RGB;
    1.86 +		break;
    1.87 +	case IMG_FMT_RGBA32:
    1.88 +		fmt = FMT_RGBA;
    1.89 +		break;
    1.90 +	case IMG_FMT_GREYF:
    1.91 +		fmt = FMT_GREY_FLOAT;
    1.92 +		break;
    1.93 +	case IMG_FMT_RGBF:
    1.94 +		fmt = FMT_RGB_FLOAT;
    1.95 +		break;
    1.96 +	case IMG_FMT_RGBAF:
    1.97 +		fmt = FMT_RGBA_FLOAT;
    1.98 +		break;
    1.99 +	default:
   1.100 +		img_destroy(&pixmap);
   1.101 +		return false;
   1.102 +	}
   1.103 +
   1.104 +	if(!set_pixels(pixmap.width, pixmap.height, pixmap.pixels, fmt)) {
   1.105 +		img_destroy(&pixmap);
   1.106 +		return false;
   1.107 +	}
   1.108 +	img_destroy(&pixmap);
   1.109 +	return true;
   1.110 +}
   1.111 +
   1.112 +bool Image::save(const char *fname) const
   1.113 +{
   1.114 +	struct img_pixmap pixmap;
   1.115 +
   1.116 +	img_init(&pixmap);
   1.117 +
   1.118 +	switch(fmt) {
   1.119 +	case FMT_GREY:
   1.120 +		pixmap.fmt = IMG_FMT_GREY8;
   1.121 +		break;
   1.122 +	case FMT_GREY_FLOAT:
   1.123 +		pixmap.fmt = IMG_FMT_GREYF;
   1.124 +		break;
   1.125 +	case FMT_RGB:
   1.126 +		pixmap.fmt = IMG_FMT_RGB24;
   1.127 +		break;
   1.128 +	case FMT_RGB_FLOAT:
   1.129 +		pixmap.fmt = IMG_FMT_RGBF;
   1.130 +		break;
   1.131 +	case FMT_RGBA:
   1.132 +		pixmap.fmt = IMG_FMT_RGBA32;
   1.133 +		break;
   1.134 +	case FMT_RGBA_FLOAT:
   1.135 +		pixmap.fmt = IMG_FMT_RGBAF;
   1.136 +		break;
   1.137 +	default:
   1.138 +		return false;
   1.139 +	}
   1.140 +
   1.141 +	pixmap.width = width;
   1.142 +	pixmap.height = height;
   1.143 +	pixmap.pixels = pixels;
   1.144 +	pixmap.pixelsz = pixel_size(fmt);
   1.145 +
   1.146 +	if(img_save(&pixmap, fname) == -1) {
   1.147 +		return false;
   1.148 +	}
   1.149 +	return true;
   1.150 +}
   1.151 +
   1.152 +static int pixel_elements(Image::Format fmt)
   1.153 +{
   1.154 +	switch(fmt) {
   1.155 +	case Image::FMT_GREY:
   1.156 +	case Image::FMT_GREY_FLOAT:
   1.157 +		return 1;
   1.158 +
   1.159 +	case Image::FMT_RGB:
   1.160 +	case Image::FMT_RGB_FLOAT:
   1.161 +		return 3;
   1.162 +
   1.163 +	case Image::FMT_RGBA:
   1.164 +	case Image::FMT_RGBA_FLOAT:
   1.165 +		return 4;
   1.166 +
   1.167 +	default:
   1.168 +		break;
   1.169 +	}
   1.170 +	return 0;
   1.171 +}
   1.172 +
   1.173 +static int elem_size(Image::Format fmt)
   1.174 +{
   1.175 +	switch(fmt) {
   1.176 +	case Image::FMT_GREY:
   1.177 +	case Image::FMT_RGB:
   1.178 +	case Image::FMT_RGBA:
   1.179 +		return 1;
   1.180 +
   1.181 +	case Image::FMT_GREY_FLOAT:
   1.182 +	case Image::FMT_RGB_FLOAT:
   1.183 +	case Image::FMT_RGBA_FLOAT:
   1.184 +		return sizeof(float);
   1.185 +
   1.186 +	default:
   1.187 +		break;
   1.188 +	}
   1.189 +	return 0;
   1.190 +}
   1.191 +
   1.192 +static int pixel_size(Image::Format fmt)
   1.193 +{
   1.194 +	return elem_size(fmt) * pixel_elements(fmt);
   1.195 +}