Dogcows Code - chaz/openbox/blob - render/color.c

   1 #include <X11/Xlib.h>
   2 #include <X11/Xutil.h>
   3 #include <string.h>
   4 #include "render.h"
   5 #include "color.h"
   6 #include "../kernel/openbox.h"
   7
   8 XColor *pseudo_colors;
   9 int pseudo_bpc;
  10
  11 void color_allocate_gc(color_rgb *in)
  12 {
  13     XGCValues gcv;
  14
  15     gcv.foreground = in->pixel;
  16     gcv.cap_style = CapProjecting;
  17     in->gc = XCreateGC(ob_display, ob_root, GCForeground | GCCapStyle, &gcv);
  18 }
  19
  20 color_rgb *color_parse(char *colorname)
  21 {
  22     XColor xcol;
  23
  24     g_assert(colorname != NULL);
  25     /* get rgb values from colorname */
  26
  27     xcol.red = 0;
  28     xcol.green = 0;
  29     xcol.blue = 0;
  30     xcol.pixel = 0;
  31     if (!XParseColor(ob_display, render_colormap, colorname, &xcol)) {
  32         g_warning("unable to parse color '%s'", colorname);
  33         return NULL;
  34     }
  35     return color_new(xcol.red >> 8, xcol.green >> 8, xcol.blue >> 8);
  36 }
  37
  38 color_rgb *color_new(int r, int g, int b)
  39 {
  40 /* this should be replaced with something far cooler */
  41     color_rgb *out;
  42     XColor xcol;
  43     xcol.red = (r << 8) | r;
  44     xcol.green = (g << 8) | g;
  45     xcol.blue = (b << 8) | b;
  46     if (XAllocColor(ob_display, render_colormap, &xcol)) {
  47         out = g_new(color_rgb, 1);
  48         out->r = xcol.red >> 8;
  49         out->g = xcol.green >> 8;
  50         out->b = xcol.blue >> 8;
  51         out->gc = None;
  52         out->pixel = xcol.pixel;
  53         return out;
  54     }
  55     return NULL;
  56 }
  57
  58 /*XXX same color could be pointed to twice, this might have to be a refcount*/
  59
  60 void color_free(color_rgb *c)
  61 {
  62     if (c != NULL) {
  63         if (c->gc != None)
  64             XFreeGC(ob_display, c->gc);
  65         g_free(c);
  66     }
  67 }
  68
  69 void reduce_depth(pixel32 *data, XImage *im)
  70 {
  71     int r, g, b;
  72     int x,y;
  73     pixel32 *p32 = (pixel32 *) im->data;
  74     pixel16 *p16 = (pixel16 *) im->data;
  75     unsigned char *p8 = (unsigned char *)im->data;
  76     switch (im->bits_per_pixel) {
  77     case 32:
  78         if ((render_red_offset != default_red_offset) ||
  79             (render_blue_offset != default_blue_offset) ||
  80             (render_green_offset != default_green_offset)) {
  81             for (y = 0; y < im->height; y++) {
  82                 for (x = 0; x < im->width; x++) {
  83                     r = (data[x] >> default_red_offset) & 0xFF;
  84                     g = (data[x] >> default_green_offset) & 0xFF;
  85                     b = (data[x] >> default_blue_offset) & 0xFF;
  86                     p32[x] = (r << render_red_shift)
  87                            + (g << render_green_shift)
  88                            + (b << render_blue_shift);
  89                 }
  90                 data += im->width;
  91                 p32 += im->width;
  92             }
  93         } else im->data = (char*) data;
  94         break;
  95     case 16:
  96         for (y = 0; y < im->height; y++) {
  97             for (x = 0; x < im->width; x++) {
  98                 r = (data[x] >> default_red_offset) & 0xFF;
  99                 r = r >> render_red_shift;
 100                 g = (data[x] >> default_green_offset) & 0xFF;
 101                 g = g >> render_green_shift;
 102                 b = (data[x] >> default_blue_offset) & 0xFF;
 103                 b = b >> render_blue_shift;
 104                 p16[x] = (r << render_red_offset)
 105                     + (g << render_green_offset)
 106                     + (b << render_blue_offset);
 107             }
 108             data += im->width;
 109             p16 += im->bytes_per_line/2;
 110         }
 111     break;
 112     case 8:
 113         g_assert(render_visual->class != TrueColor);
 114         for (y = 0; y < im->height; y++) {
 115             for (x = 0; x < im->width; x++) {
 116                 p8[x] = pickColor(data[x] >> default_red_offset,
 117                        data[x] >> default_green_offset,
 118                        data[x] >> default_blue_offset)->pixel;
 119         }
 120         data += im->width;
 121         p8 += im->bytes_per_line;
 122   }
 123
 124     break;
 125     default:
 126         g_message("your bit depth is currently unhandled\n");
 127     }
 128 }
 129
 130 XColor *pickColor(int r, int g, int b)
 131 {
 132   r = (r & 0xff) >> (8-pseudo_bpc);
 133   g = (g & 0xff) >> (8-pseudo_bpc);
 134   b = (b & 0xff) >> (8-pseudo_bpc);
 135   return &pseudo_colors[(r << (2*pseudo_bpc)) + (g << (1*pseudo_bpc)) + b];
 136 }
 137
 138 static void swap_byte_order(XImage *im)
 139 {
 140     int x, y, di;
 141
 142     g_message("SWAPPING BYTE ORDER");
 143
 144     di = 0;
 145     for (y = 0; y < im->height; ++y) {
 146         for (x = 0; x < im->height; ++x) {
 147             char *c = &im->data[di + x * im->bits_per_pixel / 8];
 148             char t;
 149
 150             switch (im->bits_per_pixel) {
 151             case 32:
 152                 t = c[2];
 153                 c[2] = c[3];
 154                 c[3] = t;
 155             case 16:
 156                 t = c[0];
 157                 c[0] = c[1];
 158                 c[1] = t;
 159             case 8:
 160                 break;
 161             default:
 162                 g_message("your bit depth is currently unhandled\n");
 163             }
 164         }
 165         di += im->bytes_per_line;
 166     }
 167
 168     if (im->byte_order == LSBFirst)
 169         im->byte_order = MSBFirst;
 170     else
 171         im->byte_order = LSBFirst;
 172 }
 173
 174 void increase_depth(pixel32 *data, XImage *im)
 175 {
 176     int r, g, b;
 177     int x,y;
 178     pixel32 *p32 = (pixel32 *) im->data;
 179     pixel16 *p16 = (pixel16 *) im->data;
 180     unsigned char *p8 = (unsigned char *)im->data;
 181
 182     if (im->byte_order != render_endian)
 183         swap_byte_order(im);
 184
 185     switch (im->bits_per_pixel) {
 186     case 32:
 187         for (y = 0; y < im->height; y++) {
 188             for (x = 0; x < im->width; x++) {
 189                 r = (p32[x] >> render_red_offset) & 0xff;
 190                 g = (p32[x] >> render_green_offset) & 0xff;
 191                 b = (p32[x] >> render_blue_offset) & 0xff;
 192                 data[x] = (r << default_red_offset)
 193                     + (g << default_green_offset)
 194                     + (b << default_blue_offset)
 195                     + (0xff << default_alpha_offset);
 196             }
 197             data += im->width;
 198             p32 += im->bytes_per_line/4;
 199         }
 200         break;
 201     case 16:
 202         for (y = 0; y < im->height; y++) {
 203             for (x = 0; x < im->width; x++) {
 204                 r = (p16[x] & render_red_mask) >> render_red_offset <<
 205                     render_red_shift;
 206                 g = (p16[x] & render_green_mask) >> render_green_offset <<
 207                     render_green_shift;
 208                 b = (p16[x] & render_blue_mask) >> render_blue_offset <<
 209                     render_blue_shift;
 210                 data[x] = (r << default_red_offset)
 211                     + (g << default_green_offset)
 212                     + (b << default_blue_offset)
 213                     + (0xff << default_alpha_offset);
 214             }
 215             data += im->width;
 216             p16 += im->bytes_per_line/2;
 217         }
 218         break;
 219     case 8:
 220         g_assert(render_visual->class != TrueColor);
 221         for (y = 0; y < im->height; y++) {
 222             for (x = 0; x < im->width; x++) {
 223                 XColor icolor;
 224                 int ii, r, g, b;
 225                 gulong dev, closest = 0xffffffff, close = 0;
 226
 227                 icolor.pixel = p8[x];
 228                 XQueryColor(ob_display, render_colormap, &icolor);
 229
 230                 /* find the nearest color match */
 231                 for (ii = 0; ii < pseudo_ncolors(); ii++) {
 232                     /* find deviations */
 233                     r = (pseudo_colors[ii].red - icolor.red) & 0xff;
 234                     g = (pseudo_colors[ii].green - icolor.green) & 0xff;
 235                     b = (pseudo_colors[ii].blue - icolor.blue) & 0xff;
 236                     /* find a weighted absolute deviation */
 237                     dev = (r * r) + (g * g) + (b * b);
 238
 239                     if (dev < closest) {
 240                         closest = dev;
 241                         close = ii;
 242                     }
 243                 }
 244                 data[x] =
 245                     (pseudo_colors[close].red & 0xff <<
 246                      default_red_offset) +
 247                     (pseudo_colors[close].green & 0xff <<
 248                        default_green_offset) +
 249                     (pseudo_colors[close].blue & 0xff <<
 250                        default_blue_offset) +
 251                     (0xff << default_alpha_offset);
 252         }
 253         data += im->width;
 254         p8 += im->bytes_per_line;
 255   }
 256
 257     break;
 258     default:
 259         g_message("your bit depth is currently unhandled\n");
 260     }
 261 }