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

   1 #include "render.h"
   2 #include "color.h"
   3
   4 #include <X11/Xlib.h>
   5 #include <X11/Xutil.h>
   6 #include <string.h>
   7
   8 void RrColorAllocateGC(RrColor *in)
   9 {
  10     XGCValues gcv;
  11
  12     gcv.foreground = in->pixel;
  13     gcv.cap_style = CapProjecting;
  14     in->gc = XCreateGC(RrDisplay(in->inst),
  15                        RrRootWindow(in->inst),
  16                        GCForeground | GCCapStyle, &gcv);
  17 }
  18
  19 RrColor *RrColorParse(const RrInstance *inst, gchar *colorname)
  20 {
  21     XColor xcol;
  22
  23     g_assert(colorname != NULL);
  24     /* get rgb values from colorname */
  25
  26     xcol.red = 0;
  27     xcol.green = 0;
  28     xcol.blue = 0;
  29     xcol.pixel = 0;
  30     if (!XParseColor(RrDisplay(inst), RrColormap(inst), colorname, &xcol)) {
  31         g_warning("unable to parse color '%s'", colorname);
  32         return NULL;
  33     }
  34     return RrColorNew(inst, xcol.red >> 8, xcol.green >> 8, xcol.blue >> 8);
  35 }
  36
  37 RrColor *RrColorNew(const RrInstance *inst, gint r, gint g, gint b)
  38 {
  39     /* this should be replaced with something far cooler */
  40     RrColor *out = NULL;
  41     XColor xcol;
  42     xcol.red = (r << 8) | r;
  43     xcol.green = (g << 8) | g;
  44     xcol.blue = (b << 8) | b;
  45     if (XAllocColor(RrDisplay(inst), RrColormap(inst), &xcol)) {
  46         out = g_new(RrColor, 1);
  47         out->inst = inst;
  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     }
  54     return out;
  55 }
  56
  57 /*XXX same color could be pointed to twice, this might have to be a refcount*/
  58
  59 void RrColorFree(RrColor *c)
  60 {
  61     if (c) {
  62         if (c->pixel) XFreeColors(RrDisplay(c->inst), RrColormap(c->inst),
  63                                   &c->pixel, 1, 0);
  64         if (c->gc) XFreeGC(RrDisplay(c->inst), c->gc);
  65         g_free(c);
  66     }
  67 }
  68
  69 void RrReduceDepth(const RrInstance *inst, RrPixel32 *data, XImage *im)
  70 {
  71     int r, g, b;
  72     int x,y;
  73     RrPixel32 *p32 = (RrPixel32 *) im->data;
  74     RrPixel16 *p16 = (RrPixel16 *) im->data;
  75     unsigned char *p8 = (unsigned char *)im->data;
  76     switch (im->bits_per_pixel) {
  77     case 32:
  78         if ((RrRedOffset(inst) != RrDefaultRedOffset) ||
  79             (RrBlueOffset(inst) != RrDefaultBlueOffset) ||
  80             (RrGreenOffset(inst) != RrDefaultGreenOffset)) {
  81             for (y = 0; y < im->height; y++) {
  82                 for (x = 0; x < im->width; x++) {
  83                     r = (data[x] >> RrDefaultRedOffset) & 0xFF;
  84                     g = (data[x] >> RrDefaultGreenOffset) & 0xFF;
  85                     b = (data[x] >> RrDefaultBlueOffset) & 0xFF;
  86                     p32[x] = (r << RrRedOffset(inst))
  87                            + (g << RrGreenOffset(inst))
  88                            + (b << RrBlueOffset(inst));
  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] >> RrDefaultRedOffset) & 0xFF;
  99                 r = r >> RrRedShift(inst);
 100                 g = (data[x] >> RrDefaultGreenOffset) & 0xFF;
 101                 g = g >> RrGreenShift(inst);
 102                 b = (data[x] >> RrDefaultBlueOffset) & 0xFF;
 103                 b = b >> RrBlueShift(inst);
 104                 p16[x] = (r << RrRedOffset(inst))
 105                        + (g << RrGreenOffset(inst))
 106                        + (b << RrBlueOffset(inst));
 107             }
 108             data += im->width;
 109             p16 += im->bytes_per_line/2;
 110         }
 111     break;
 112     case 8:
 113         g_assert(RrVisual(inst)->class != TrueColor);
 114         for (y = 0; y < im->height; y++) {
 115             for (x = 0; x < im->width; x++) {
 116                 p8[x] = RrPickColor(inst,
 117                                     data[x] >> RrDefaultRedOffset,
 118                                     data[x] >> RrDefaultGreenOffset,
 119                                     data[x] >> RrDefaultBlueOffset)->pixel;
 120         }
 121         data += im->width;
 122         p8 += im->bytes_per_line;
 123   }
 124
 125     break;
 126     default:
 127         g_warning("your bit depth is currently unhandled\n");
 128     }
 129 }
 130
 131 XColor *RrPickColor(const RrInstance *inst, gint r, gint g, gint b)
 132 {
 133   r = (r & 0xff) >> (8-RrPseudoBPC(inst));
 134   g = (g & 0xff) >> (8-RrPseudoBPC(inst));
 135   b = (b & 0xff) >> (8-RrPseudoBPC(inst));
 136   return &RrPseudoColors(inst)[(r << (2*RrPseudoBPC(inst))) +
 137                                (g << (1*RrPseudoBPC(inst))) +
 138                                b];
 139 }
 140
 141 static void swap_byte_order(XImage *im)
 142 {
 143     int x, y, di;
 144
 145     di = 0;
 146     for (y = 0; y < im->height; ++y) {
 147         for (x = 0; x < im->height; ++x) {
 148             char *c = &im->data[di + x * im->bits_per_pixel / 8];
 149             char t;
 150
 151             switch (im->bits_per_pixel) {
 152             case 32:
 153                 t = c[2];
 154                 c[2] = c[3];
 155                 c[3] = t;
 156             case 16:
 157                 t = c[0];
 158                 c[0] = c[1];
 159                 c[1] = t;
 160             case 8:
 161                 break;
 162             default:
 163                 g_warning("your bit depth is currently unhandled");
 164             }
 165         }
 166         di += im->bytes_per_line;
 167     }
 168
 169     if (im->byte_order == LSBFirst)
 170         im->byte_order = MSBFirst;
 171     else
 172         im->byte_order = LSBFirst;
 173 }
 174
 175 void RrIncreaseDepth(const RrInstance *inst, RrPixel32 *data, XImage *im)
 176 {
 177     int r, g, b;
 178     int x,y;
 179     RrPixel32 *p32 = (RrPixel32 *) im->data;
 180     RrPixel16 *p16 = (RrPixel16 *) im->data;
 181     unsigned char *p8 = (unsigned char *)im->data;
 182
 183     if (im->byte_order != LSBFirst)
 184         swap_byte_order(im);
 185
 186     switch (im->bits_per_pixel) {
 187     case 32:
 188         for (y = 0; y < im->height; y++) {
 189             for (x = 0; x < im->width; x++) {
 190                 r = (p32[x] >> RrRedOffset(inst)) & 0xff;
 191                 g = (p32[x] >> RrGreenOffset(inst)) & 0xff;
 192                 b = (p32[x] >> RrBlueOffset(inst)) & 0xff;
 193                 data[x] = (r << RrDefaultRedOffset)
 194                     + (g << RrDefaultGreenOffset)
 195                     + (b << RrDefaultBlueOffset)
 196                     + (0xff << RrDefaultAlphaOffset);
 197             }
 198             data += im->width;
 199             p32 += im->bytes_per_line/4;
 200         }
 201         break;
 202     case 16:
 203         for (y = 0; y < im->height; y++) {
 204             for (x = 0; x < im->width; x++) {
 205                 r = (p16[x] & RrRedMask(inst)) >>
 206                     RrRedOffset(inst) <<
 207                     RrRedShift(inst);
 208                 g = (p16[x] & RrGreenMask(inst)) >>
 209                     RrGreenOffset(inst) <<
 210                     RrGreenShift(inst);
 211                 b = (p16[x] & RrBlueMask(inst)) >>
 212                     RrBlueOffset(inst) <<
 213                     RrBlueShift(inst);
 214                 data[x] = (r << RrDefaultRedOffset)
 215                     + (g << RrDefaultGreenOffset)
 216                     + (b << RrDefaultBlueOffset)
 217                     + (0xff << RrDefaultAlphaOffset);
 218             }
 219             data += im->width;
 220             p16 += im->bytes_per_line/2;
 221         }
 222         break;
 223     case 8:
 224         g_warning("this image bit depth is currently unhandled");
 225         break;
 226     case 1:
 227         for (y = 0; y < im->height; y++) {
 228             for (x = 0; x < im->width; x++) {
 229                 if (!(((p8[x / 8]) >> (x % 8)) & 0x1))
 230                     data[x] = 0xff << RrDefaultAlphaOffset; /* black */
 231                 else
 232                     data[x] = 0xffffffff; /* white */
 233             }
 234             data += im->width;
 235             p8 += im->bytes_per_line;
 236         }
 237         break;
 238     default:
 239         g_warning("this image bit depth is currently unhandled");
 240     }
 241 }
 242
 243 int RrColorRed(const RrColor *c)
 244 {
 245     return c->r;
 246 }
 247
 248 int RrColorGreen(const RrColor *c)
 249 {
 250     return c->g;
 251 }
 252
 253 int RrColorBlue(const RrColor *c)
 254 {
 255     return c->b;
 256 }
 257
 258 gulong RrColorPixel(const RrColor *c)
 259 {
 260     return c->pixel;
 261 }