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->gc) XFreeGC(RrDisplay(c->inst), c->gc);
  63         g_free(c);
  64     }
  65 }
  66
  67 void RrReduceDepth(const RrInstance *inst, RrPixel32 *data, XImage *im)
  68 {
  69     int r, g, b;
  70     int x,y;
  71     RrPixel32 *p32 = (RrPixel32 *) im->data;
  72     RrPixel16 *p16 = (RrPixel16 *) im->data;
  73     unsigned char *p8 = (unsigned char *)im->data;
  74     switch (im->bits_per_pixel) {
  75     case 32:
  76         if ((RrRedOffset(inst) != RrDefaultRedOffset) ||
  77             (RrBlueOffset(inst) != RrDefaultBlueOffset) ||
  78             (RrGreenOffset(inst) != RrDefaultGreenOffset)) {
  79             for (y = 0; y < im->height; y++) {
  80                 for (x = 0; x < im->width; x++) {
  81                     r = (data[x] >> RrDefaultRedOffset) & 0xFF;
  82                     g = (data[x] >> RrDefaultGreenOffset) & 0xFF;
  83                     b = (data[x] >> RrDefaultBlueOffset) & 0xFF;
  84                     p32[x] = (r << RrRedOffset(inst))
  85                            + (g << RrGreenOffset(inst))
  86                            + (b << RrBlueOffset(inst));
  87                 }
  88                 data += im->width;
  89                 p32 += im->width;
  90             }
  91         } else im->data = (char*) data;
  92         break;
  93     case 16:
  94         for (y = 0; y < im->height; y++) {
  95             for (x = 0; x < im->width; x++) {
  96                 r = (data[x] >> RrDefaultRedOffset) & 0xFF;
  97                 r = r >> RrRedShift(inst);
  98                 g = (data[x] >> RrDefaultGreenOffset) & 0xFF;
  99                 g = g >> RrGreenShift(inst);
 100                 b = (data[x] >> RrDefaultBlueOffset) & 0xFF;
 101                 b = b >> RrBlueShift(inst);
 102                 p16[x] = (r << RrRedOffset(inst))
 103                        + (g << RrGreenOffset(inst))
 104                        + (b << RrBlueOffset(inst));
 105             }
 106             data += im->width;
 107             p16 += im->bytes_per_line/2;
 108         }
 109     break;
 110     case 8:
 111         g_assert(RrVisual(inst)->class != TrueColor);
 112         for (y = 0; y < im->height; y++) {
 113             for (x = 0; x < im->width; x++) {
 114                 p8[x] = RrPickColor(inst,
 115                                     data[x] >> RrDefaultRedOffset,
 116                                     data[x] >> RrDefaultGreenOffset,
 117                                     data[x] >> RrDefaultBlueOffset)->pixel;
 118         }
 119         data += im->width;
 120         p8 += im->bytes_per_line;
 121   }
 122
 123     break;
 124     default:
 125         g_warning("your bit depth is currently unhandled\n");
 126     }
 127 }
 128
 129 XColor *RrPickColor(const RrInstance *inst, gint r, gint g, gint b)
 130 {
 131   r = (r & 0xff) >> (8-RrPseudoBPC(inst));
 132   g = (g & 0xff) >> (8-RrPseudoBPC(inst));
 133   b = (b & 0xff) >> (8-RrPseudoBPC(inst));
 134   return &RrPseudoColors(inst)[(r << (2*RrPseudoBPC(inst))) +
 135                                (g << (1*RrPseudoBPC(inst))) +
 136                                b];
 137 }
 138
 139 static void swap_byte_order(XImage *im)
 140 {
 141     int x, y, di;
 142
 143     di = 0;
 144     for (y = 0; y < im->height; ++y) {
 145         for (x = 0; x < im->height; ++x) {
 146             char *c = &im->data[di + x * im->bits_per_pixel / 8];
 147             char t;
 148
 149             switch (im->bits_per_pixel) {
 150             case 32:
 151                 t = c[2];
 152                 c[2] = c[3];
 153                 c[3] = t;
 154             case 16:
 155                 t = c[0];
 156                 c[0] = c[1];
 157                 c[1] = t;
 158             case 8:
 159                 break;
 160             default:
 161                 g_warning("your bit depth is currently unhandled");
 162             }
 163         }
 164         di += im->bytes_per_line;
 165     }
 166
 167     if (im->byte_order == LSBFirst)
 168         im->byte_order = MSBFirst;
 169     else
 170         im->byte_order = LSBFirst;
 171 }
 172
 173 void RrIncreaseDepth(const RrInstance *inst, RrPixel32 *data, XImage *im)
 174 {
 175     int r, g, b;
 176     int x,y;
 177     RrPixel32 *p32 = (RrPixel32 *) im->data;
 178     RrPixel16 *p16 = (RrPixel16 *) im->data;
 179     unsigned char *p8 = (unsigned char *)im->data;
 180
 181     if (im->byte_order != LSBFirst)
 182         swap_byte_order(im);
 183
 184     switch (im->bits_per_pixel) {
 185     case 32:
 186         for (y = 0; y < im->height; y++) {
 187             for (x = 0; x < im->width; x++) {
 188                 r = (p32[x] >> RrRedOffset(inst)) & 0xff;
 189                 g = (p32[x] >> RrGreenOffset(inst)) & 0xff;
 190                 b = (p32[x] >> RrBlueOffset(inst)) & 0xff;
 191                 data[x] = (r << RrDefaultRedOffset)
 192                     + (g << RrDefaultGreenOffset)
 193                     + (b << RrDefaultBlueOffset)
 194                     + (0xff << RrDefaultAlphaOffset);
 195             }
 196             data += im->width;
 197             p32 += im->bytes_per_line/4;
 198         }
 199         break;
 200     case 16:
 201         for (y = 0; y < im->height; y++) {
 202             for (x = 0; x < im->width; x++) {
 203                 r = (p16[x] & RrRedMask(inst)) >>
 204                     RrRedOffset(inst) <<
 205                     RrRedShift(inst);
 206                 g = (p16[x] & RrGreenMask(inst)) >>
 207                     RrGreenOffset(inst) <<
 208                     RrGreenShift(inst);
 209                 b = (p16[x] & RrBlueMask(inst)) >>
 210                     RrBlueOffset(inst) <<
 211                     RrBlueShift(inst);
 212                 data[x] = (r << RrDefaultRedOffset)
 213                     + (g << RrDefaultGreenOffset)
 214                     + (b << RrDefaultBlueOffset)
 215                     + (0xff << RrDefaultAlphaOffset);
 216             }
 217             data += im->width;
 218             p16 += im->bytes_per_line/2;
 219         }
 220         break;
 221     case 8:
 222         g_warning("this image bit depth is currently unhandled");
 223         break;
 224     case 1:
 225         for (y = 0; y < im->height; y++) {
 226             for (x = 0; x < im->width; x++) {
 227                 if (!(((p8[x / 8]) >> (x % 8)) & 0x1))
 228                     data[x] = 0xff << RrDefaultAlphaOffset; /* black */
 229                 else
 230                     data[x] = 0xffffffff; /* white */
 231             }
 232             data += im->width;
 233             p8 += im->bytes_per_line;
 234         }
 235         break;
 236     default:
 237         g_warning("this image bit depth is currently unhandled");
 238     }
 239 }
 240
 241 int RrColorRed(const RrColor *c)
 242 {
 243     return c->r;
 244 }
 245
 246 int RrColorGreen(const RrColor *c)
 247 {
 248     return c->g;
 249 }
 250
 251 int RrColorBlue(const RrColor *c)
 252 {
 253     return c->b;
 254 }
 255
 256 gulong RrColorPixel(const RrColor *c)
 257 {
 258     return c->pixel;
 259 }