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             for (y = 0; y < im->height; y++) {
  79                 for (x = 0; x < im->width; x++) {
  80                     r = (data[x] >> RrDefaultRedOffset) & 0xFF;
  81                     g = (data[x] >> RrDefaultGreenOffset) & 0xFF;
  82                     b = (data[x] >> RrDefaultBlueOffset) & 0xFF;
  83                     p32[x] = (r << RrRedOffset(inst))
  84                            + (g << RrGreenOffset(inst))
  85                            + (b << RrBlueOffset(inst));
  86                 }
  87                 data += im->width;
  88                 p32 += im->width;
  89             }
  90         } else im->data = (char*) data;
  91         break;
  92     case 16:
  93         for (y = 0; y < im->height; y++) {
  94             for (x = 0; x < im->width; x++) {
  95                 r = (data[x] >> RrDefaultRedOffset) & 0xFF;
  96                 r = r >> RrRedShift(inst);
  97                 g = (data[x] >> RrDefaultGreenOffset) & 0xFF;
  98                 g = g >> RrGreenShift(inst);
  99                 b = (data[x] >> RrDefaultBlueOffset) & 0xFF;
 100                 b = b >> RrBlueShift(inst);
 101                 p16[x] = (r << RrRedOffset(inst))
 102                        + (g << RrGreenOffset(inst))
 103                        + (b << RrBlueOffset(inst));
 104             }
 105             data += im->width;
 106             p16 += im->bytes_per_line/2;
 107         }
 108     break;
 109     case 8:
 110         g_assert(RrVisual(inst)->class != TrueColor);
 111         for (y = 0; y < im->height; y++) {
 112             for (x = 0; x < im->width; x++) {
 113                 p8[x] = RrPickColor(inst,
 114                                     data[x] >> RrDefaultRedOffset,
 115                                     data[x] >> RrDefaultGreenOffset,
 116                                     data[x] >> RrDefaultBlueOffset)->pixel;
 117         }
 118         data += im->width;
 119         p8 += im->bytes_per_line;
 120   }
 121
 122     break;
 123     default:
 124         g_message("your bit depth is currently unhandled\n");
 125     }
 126 }
 127
 128 XColor *RrPickColor(const RrInstance *inst, gint r, gint g, gint b)
 129 {
 130   r = (r & 0xff) >> (8-RrPseudoBPC(inst));
 131   g = (g & 0xff) >> (8-RrPseudoBPC(inst));
 132   b = (b & 0xff) >> (8-RrPseudoBPC(inst));
 133   return &RrPseudoColors(inst)[(r << (2*RrPseudoBPC(inst))) +
 134                                (g << (1*RrPseudoBPC(inst))) +
 135                                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 RrIncreaseDepth(const RrInstance *inst, RrPixel32 *data, XImage *im)
 175 {
 176     int r, g, b;
 177     int x,y;
 178     RrPixel32 *p32 = (RrPixel32 *) im->data;
 179     RrPixel16 *p16 = (RrPixel16 *) im->data;
 180     unsigned char *p8 = (unsigned char *)im->data;
 181
 182     if (im->byte_order != RrEndian)
 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] >> RrRedOffset(inst)) & 0xff;
 190                 g = (p32[x] >> RrGreenOffset(inst)) & 0xff;
 191                 b = (p32[x] >> RrBlueOffset(inst)) & 0xff;
 192                 data[x] = (r << RrDefaultRedOffset)
 193                     + (g << RrDefaultGreenOffset)
 194                     + (b << RrDefaultBlueOffset)
 195                     + (0xff << RrDefaultAlphaOffset);
 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] & RrRedMask(inst)) >>
 205                     RrRedOffset(inst) <<
 206                     RrRedShift(inst);
 207                 g = (p16[x] & RrGreenMask(inst)) >>
 208                     RrGreenOffset(inst) <<
 209                     RrGreenShift(inst);
 210                 b = (p16[x] & RrBlueMask(inst)) >>
 211                     RrBlueOffset(inst) <<
 212                     RrBlueShift(inst);
 213                 data[x] = (r << RrDefaultRedOffset)
 214                     + (g << RrDefaultGreenOffset)
 215                     + (b << RrDefaultBlueOffset)
 216                     + (0xff << RrDefaultAlphaOffset);
 217             }
 218             data += im->width;
 219             p16 += im->bytes_per_line/2;
 220         }
 221         break;
 222     case 8:
 223         g_message("this image bit depth is currently unhandled\n");
 224         break;
 225     case 1:
 226         for (y = 0; y < im->height; y++) {
 227             for (x = 0; x < im->width; x++) {
 228                 if (!(((p8[x / 8]) >> (x % 8)) & 0x1))
 229                     data[x] = 0xff << RrDefaultAlphaOffset; /* black */
 230                 else
 231                     data[x] = 0xffffffff; /* white */
 232             }
 233             data += im->width;
 234             p8 += im->bytes_per_line;
 235         }
 236         break;
 237     default:
 238         g_message("this image bit depth is currently unhandled\n");
 239     }
 240 }