goat3dgfx

annotate src/image.cc @ 0:1873dfd13f2d

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initial commit
author John Tsiombikas <nuclear@member.fsf.org>
date Thu, 14 Nov 2013 05:27:09 +0200
parents
children 3d96734fd477
rev   line source
nuclear@0 1 #include <string.h>
nuclear@0 2 #include "imago2.h"
nuclear@0 3 #include "image.h"
nuclear@0 4 #include "logger.h"
nuclear@0 5
nuclear@0 6
nuclear@0 7 static int pixel_elements(Image::Format fmt);
nuclear@0 8 static int elem_size(Image::Format fmt);
nuclear@0 9 static int pixel_size(Image::Format fmt);
nuclear@0 10
nuclear@0 11 Image::Image()
nuclear@0 12 {
nuclear@0 13 fmt = FMT_RGBA;
nuclear@0 14 width = height = 0;
nuclear@0 15 pixels = 0;
nuclear@0 16 }
nuclear@0 17
nuclear@0 18 Image::~Image()
nuclear@0 19 {
nuclear@0 20 delete [] (char*)pixels;
nuclear@0 21 }
nuclear@0 22
nuclear@0 23 int Image::get_width() const
nuclear@0 24 {
nuclear@0 25 return width;
nuclear@0 26 }
nuclear@0 27
nuclear@0 28 int Image::get_height() const
nuclear@0 29 {
nuclear@0 30 return height;
nuclear@0 31 }
nuclear@0 32
nuclear@0 33 Image::Format Image::get_format() const
nuclear@0 34 {
nuclear@0 35 return fmt;
nuclear@0 36 }
nuclear@0 37
nuclear@0 38 bool Image::create(int x, int y, Format fmt)
nuclear@0 39 {
nuclear@0 40 width = x;
nuclear@0 41 height = y;
nuclear@0 42 this->fmt = fmt;
nuclear@0 43
nuclear@0 44 try {
nuclear@0 45 pixels = new char[x * y * pixel_size(fmt)];
nuclear@0 46 }
nuclear@0 47 catch(...) {
nuclear@0 48 return false;
nuclear@0 49 }
nuclear@0 50 return true;
nuclear@0 51 }
nuclear@0 52
nuclear@0 53 bool Image::set_pixels(int x, int y, void *pixels, Format fmt)
nuclear@0 54 {
nuclear@0 55 if(!create(x, y, fmt)) {
nuclear@0 56 return false;
nuclear@0 57 }
nuclear@0 58 memcpy(this->pixels, pixels, x * y * pixel_size(fmt));
nuclear@0 59 return true;
nuclear@0 60 }
nuclear@0 61
nuclear@0 62 void *Image::get_pixels() const
nuclear@0 63 {
nuclear@0 64 return pixels;
nuclear@0 65 }
nuclear@0 66
nuclear@0 67 bool Image::load(const char *fname)
nuclear@0 68 {
nuclear@0 69 struct img_pixmap pixmap;
nuclear@0 70
nuclear@0 71 img_init(&pixmap);
nuclear@0 72 if(img_load(&pixmap, fname) == -1) {
nuclear@0 73 return false;
nuclear@0 74 }
nuclear@0 75
nuclear@0 76 Format fmt;
nuclear@0 77 switch(pixmap.fmt) {
nuclear@0 78 case IMG_FMT_GREY8:
nuclear@0 79 fmt = FMT_GREY;
nuclear@0 80 break;
nuclear@0 81 case IMG_FMT_RGB24:
nuclear@0 82 fmt = FMT_RGB;
nuclear@0 83 break;
nuclear@0 84 case IMG_FMT_RGBA32:
nuclear@0 85 fmt = FMT_RGBA;
nuclear@0 86 break;
nuclear@0 87 case IMG_FMT_GREYF:
nuclear@0 88 fmt = FMT_GREY_FLOAT;
nuclear@0 89 break;
nuclear@0 90 case IMG_FMT_RGBF:
nuclear@0 91 fmt = FMT_RGB_FLOAT;
nuclear@0 92 break;
nuclear@0 93 case IMG_FMT_RGBAF:
nuclear@0 94 fmt = FMT_RGBA_FLOAT;
nuclear@0 95 break;
nuclear@0 96 default:
nuclear@0 97 img_destroy(&pixmap);
nuclear@0 98 return false;
nuclear@0 99 }
nuclear@0 100
nuclear@0 101 if(!set_pixels(pixmap.width, pixmap.height, pixmap.pixels, fmt)) {
nuclear@0 102 img_destroy(&pixmap);
nuclear@0 103 return false;
nuclear@0 104 }
nuclear@0 105 img_destroy(&pixmap);
nuclear@0 106 return true;
nuclear@0 107 }
nuclear@0 108
nuclear@0 109 bool Image::save(const char *fname) const
nuclear@0 110 {
nuclear@0 111 struct img_pixmap pixmap;
nuclear@0 112
nuclear@0 113 img_init(&pixmap);
nuclear@0 114
nuclear@0 115 switch(fmt) {
nuclear@0 116 case FMT_GREY:
nuclear@0 117 pixmap.fmt = IMG_FMT_GREY8;
nuclear@0 118 break;
nuclear@0 119 case FMT_GREY_FLOAT:
nuclear@0 120 pixmap.fmt = IMG_FMT_GREYF;
nuclear@0 121 break;
nuclear@0 122 case FMT_RGB:
nuclear@0 123 pixmap.fmt = IMG_FMT_RGB24;
nuclear@0 124 break;
nuclear@0 125 case FMT_RGB_FLOAT:
nuclear@0 126 pixmap.fmt = IMG_FMT_RGBF;
nuclear@0 127 break;
nuclear@0 128 case FMT_RGBA:
nuclear@0 129 pixmap.fmt = IMG_FMT_RGBA32;
nuclear@0 130 break;
nuclear@0 131 case FMT_RGBA_FLOAT:
nuclear@0 132 pixmap.fmt = IMG_FMT_RGBAF;
nuclear@0 133 break;
nuclear@0 134 default:
nuclear@0 135 return false;
nuclear@0 136 }
nuclear@0 137
nuclear@0 138 pixmap.width = width;
nuclear@0 139 pixmap.height = height;
nuclear@0 140 pixmap.pixels = pixels;
nuclear@0 141 pixmap.pixelsz = pixel_size(fmt);
nuclear@0 142
nuclear@0 143 if(img_save(&pixmap, fname) == -1) {
nuclear@0 144 return false;
nuclear@0 145 }
nuclear@0 146 return true;
nuclear@0 147 }
nuclear@0 148
nuclear@0 149 static int pixel_elements(Image::Format fmt)
nuclear@0 150 {
nuclear@0 151 switch(fmt) {
nuclear@0 152 case Image::FMT_GREY:
nuclear@0 153 case Image::FMT_GREY_FLOAT:
nuclear@0 154 return 1;
nuclear@0 155
nuclear@0 156 case Image::FMT_RGB:
nuclear@0 157 case Image::FMT_RGB_FLOAT:
nuclear@0 158 return 3;
nuclear@0 159
nuclear@0 160 case Image::FMT_RGBA:
nuclear@0 161 case Image::FMT_RGBA_FLOAT:
nuclear@0 162 return 4;
nuclear@0 163
nuclear@0 164 default:
nuclear@0 165 break;
nuclear@0 166 }
nuclear@0 167 return 0;
nuclear@0 168 }
nuclear@0 169
nuclear@0 170 static int elem_size(Image::Format fmt)
nuclear@0 171 {
nuclear@0 172 switch(fmt) {
nuclear@0 173 case Image::FMT_GREY:
nuclear@0 174 case Image::FMT_RGB:
nuclear@0 175 case Image::FMT_RGBA:
nuclear@0 176 return 1;
nuclear@0 177
nuclear@0 178 case Image::FMT_GREY_FLOAT:
nuclear@0 179 case Image::FMT_RGB_FLOAT:
nuclear@0 180 case Image::FMT_RGBA_FLOAT:
nuclear@0 181 return sizeof(float);
nuclear@0 182
nuclear@0 183 default:
nuclear@0 184 break;
nuclear@0 185 }
nuclear@0 186 return 0;
nuclear@0 187 }
nuclear@0 188
nuclear@0 189 static int pixel_size(Image::Format fmt)
nuclear@0 190 {
nuclear@0 191 return elem_size(fmt) * pixel_elements(fmt);
nuclear@0 192 }