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
   7 void RrColorAllocateGC(RrColor *in)
   8 {
   9     XGCValues gcv;
  10
  11     gcv.foreground = in->pixel;
  12     gcv.cap_style = CapProjecting;
  13     in->gc = XCreateGC(RrDisplay(in->inst),
  14                        RrRootWindow(in->inst),
  15                        GCForeground | GCCapStyle, &gcv);
  16 }
  17
  18 RrColor *RrColorParse(const RrInstance *inst, gchar *colorname)
  19 {
  20     XColor xcol;
  21
  22     g_assert(colorname != NULL);
  23     /* get rgb values from colorname */
  24
  25     xcol.red = 0;
  26     xcol.green = 0;
  27     xcol.blue = 0;
  28     xcol.pixel = 0;
  29     if (!XParseColor(RrDisplay(inst), RrColormap(inst), colorname, &xcol)) {
  30         g_warning("unable to parse color '%s'", colorname);
  31         return NULL;
  32     }
  33     return RrColorNew(inst, xcol.red >> 8, xcol.green >> 8, xcol.blue >> 8);
  34 }
  35
  36 RrColor *RrColorNew(const RrInstance *inst, gint r, gint g, gint b)
  37 {
  38     /* this should be replaced with something far cooler */
  39     RrColor *out = NULL;
  40     XColor xcol;
  41     xcol.red = (r << 8) | r;
  42     xcol.green = (g << 8) | g;
  43     xcol.blue = (b << 8) | b;
  44     if (XAllocColor(RrDisplay(inst), RrColormap(inst), &xcol)) {
  45         out = g_new(RrColor, 1);
  46         out->inst = inst;
  47         out->r = xcol.red >> 8;
  48         out->g = xcol.green >> 8;
  49         out->b = xcol.blue >> 8;
  50         out->gc = None;
  51         out->pixel = xcol.pixel;
  52     }
  53     return out;
  54 }
  55
  56 /*XXX same color could be pointed to twice, this might have to be a refcount*/
  57
  58 void RrColorFree(RrColor *c)
  59 {
  60     if (c) {
  61         if (c->gc) XFreeGC(RrDisplay(c->inst), c->gc);
  62         g_free(c);
  63     }
  64 }
  65
  66 void RrReduceDepth(const RrInstance *inst, RrPixel32 *data, XImage *im)
  67 {
  68     int r, g, b;
  69     int x,y;
  70     RrPixel32 *p32 = (RrPixel32 *) im->data;
  71     RrPixel16 *p16 = (RrPixel16 *) im->data;
  72     unsigned char *p8 = (unsigned char *)im->data;
  73     switch (im->bits_per_pixel) {
  74     case 32:
  75         if ((RrRedOffset(inst) != RrDefaultRedOffset) ||
  76             (RrBlueOffset(inst) != RrDefaultBlueOffset) ||
  77             (RrGreenOffset(inst) != RrDefaultGreenOffset)) {
  78             g_message("CONVERSION %d->%d %d->%d %d->%d",
  79                       RrDefaultRedOffset, RrRedOffset(inst),
  80                       RrDefaultBlueOffset, RrGreenOffset(inst),
  81                       RrDefaultGreenOffset, RrBlueOffset(inst));
  82             for (y = 0; y < im->height; y++) {
  83                 for (x = 0; x < im->width; x++) {
  84                     r = (data[x] >> RrDefaultRedOffset) & 0xFF;
  85                     g = (data[x] >> RrDefaultGreenOffset) & 0xFF;
  86                     b = (data[x] >> RrDefaultBlueOffset) & 0xFF;
  87                     p32[x] = (r << RrRedOffset(inst))
  88                            + (g << RrGreenOffset(inst))
  89                            + (b << RrBlueOffset(inst));
  90                 }
  91                 data += im->width;
  92                 p32 += im->width;
  93             }
  94         } else im->data = (char*) data;
  95         break;
  96     case 16:
  97         for (y = 0; y < im->height; y++) {
  98             for (x = 0; x < im->width; x++) {
  99                 r = (data[x] >> RrDefaultRedOffset) & 0xFF;
 100                 r = r >> RrRedShift(inst);
 101                 g = (data[x] >> RrDefaultGreenOffset) & 0xFF;
 102                 g = g >> RrGreenShift(inst);
 103                 b = (data[x] >> RrDefaultBlueOffset) & 0xFF;
 104                 b = b >> RrBlueShift(inst);
 105                 p16[x] = (r << RrRedOffset(inst))
 106                        + (g << RrGreenOffset(inst))
 107                        + (b << RrBlueOffset(inst));
 108             }
 109             data += im->width;
 110             p16 += im->bytes_per_line/2;
 111         }
 112     break;
 113     case 8:
 114         g_assert(RrVisual(inst)->class != TrueColor);
 115         for (y = 0; y < im->height; y++) {
 116             for (x = 0; x < im->width; x++) {
 117                 p8[x] = RrPickColor(inst,
 118                                     data[x] >> RrDefaultRedOffset,
 119                                     data[x] >> RrDefaultGreenOffset,
 120                                     data[x] >> RrDefaultBlueOffset)->pixel;
 121         }
 122         data += im->width;
 123         p8 += im->bytes_per_line;
 124   }
 125
 126     break;
 127     default:
 128         g_message("your bit depth is currently unhandled\n");
 129     }
 130 }
 131
 132 XColor *RrPickColor(const RrInstance *inst, gint r, gint g, gint b)
 133 {
 134   r = (r & 0xff) >> (8-RrPseudoBPC(inst));
 135   g = (g & 0xff) >> (8-RrPseudoBPC(inst));
 136   b = (b & 0xff) >> (8-RrPseudoBPC(inst));
 137   return &RrPseudoColors(inst)[(r << (2*RrPseudoBPC(inst))) +
 138                                (g << (1*RrPseudoBPC(inst))) +
 139                                b];
 140 }
 141
 142 static void swap_byte_order(XImage *im)
 143 {
 144     int x, y, di;
 145
 146     g_message("SWAPPING BYTE ORDER");
 147
 148     di = 0;
 149     for (y = 0; y < im->height; ++y) {
 150         for (x = 0; x < im->height; ++x) {
 151             char *c = &im->data[di + x * im->bits_per_pixel / 8];
 152             char t;
 153
 154             switch (im->bits_per_pixel) {
 155             case 32:
 156                 t = c[2];
 157                 c[2] = c[3];
 158                 c[3] = t;
 159             case 16:
 160                 t = c[0];
 161                 c[0] = c[1];
 162                 c[1] = t;
 163             case 8:
 164                 break;
 165             default:
 166                 g_message("your bit depth is currently unhandled\n");
 167             }
 168         }
 169         di += im->bytes_per_line;
 170     }
 171
 172     if (im->byte_order == LSBFirst)
 173         im->byte_order = MSBFirst;
 174     else
 175         im->byte_order = LSBFirst;
 176 }
 177
 178 void RrIncreaseDepth(const RrInstance *inst, RrPixel32 *data, XImage *im)
 179 {
 180     int r, g, b;
 181     int x,y;
 182     RrPixel32 *p32 = (RrPixel32 *) im->data;
 183     RrPixel16 *p16 = (RrPixel16 *) im->data;
 184     unsigned char *p8 = (unsigned char *)im->data;
 185
 186     if (im->byte_order != RrEndian)
 187         swap_byte_order(im);
 188
 189     switch (im->bits_per_pixel) {
 190     case 32:
 191         for (y = 0; y < im->height; y++) {
 192             for (x = 0; x < im->width; x++) {
 193                 r = (p32[x] >> RrRedOffset(inst)) & 0xff;
 194                 g = (p32[x] >> RrGreenOffset(inst)) & 0xff;
 195                 b = (p32[x] >> RrBlueOffset(inst)) & 0xff;
 196                 data[x] = (r << RrDefaultRedOffset)
 197                     + (g << RrDefaultGreenOffset)
 198                     + (b << RrDefaultBlueOffset)
 199                     + (0xff << RrDefaultAlphaOffset);
 200             }
 201             data += im->width;
 202             p32 += im->bytes_per_line/4;
 203         }
 204         break;
 205     case 16:
 206         for (y = 0; y < im->height; y++) {
 207             for (x = 0; x < im->width; x++) {
 208                 r = (p16[x] & RrRedMask(inst)) >>
 209                     RrRedOffset(inst) <<
 210                     RrRedShift(inst);
 211                 g = (p16[x] & RrGreenMask(inst)) >>
 212                     RrGreenOffset(inst) <<
 213                     RrGreenShift(inst);
 214                 b = (p16[x] & RrBlueMask(inst)) >>
 215                     RrBlueOffset(inst) <<
 216                     RrBlueShift(inst);
 217                 data[x] = (r << RrDefaultRedOffset)
 218                     + (g << RrDefaultGreenOffset)
 219                     + (b << RrDefaultBlueOffset)
 220                     + (0xff << RrDefaultAlphaOffset);
 221             }
 222             data += im->width;
 223             p16 += im->bytes_per_line/2;
 224         }
 225         break;
 226     case 8:
 227         g_message("this image bit depth is currently unhandled\n");
 228         break;
 229     case 1:
 230         for (y = 0; y < im->height; y++) {
 231             for (x = 0; x < im->width; x++) {
 232                 if (!(((p8[x / 8]) >> (x % 8)) & 0x1))
 233                     data[x] = 0xff << RrDefaultAlphaOffset; /* black */
 234                 else
 235                     data[x] = 0xffffffff; /* white */
 236             }
 237             data += im->width;
 238             p8 += im->bytes_per_line;
 239         }
 240         break;
 241     default:
 242         g_message("this image bit depth is currently unhandled\n");
 243     }
 244 }
 245
 246 int RrColorRed(const RrColor *c)
 247 {
 248     return c->r;
 249 }
 250
 251 int RrColorGreen(const RrColor *c)
 252 {
 253     return c->g;
 254 }
 255
 256 int RrColorBlue(const RrColor *c)
 257 {
 258     return c->b;
 259 }
 260
 261 gulong RrColorPixel(const RrColor *c)
 262 {
 263     return c->pixel;
 264 }