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 XColor *pseudo_colors;
   8 int pseudo_bpc;
   9
  10 void color_allocate_gc(RrColor *in)
  11 {
  12     XGCValues gcv;
  13
  14     gcv.foreground = in->pixel;
  15     gcv.cap_style = CapProjecting;
  16     in->gc = XCreateGC(RrDisplay(in->inst),
  17                        RrRootWindow(in->inst),
  18                        GCForeground | GCCapStyle, &gcv);
  19 }
  20
  21 RrColor *RrColorParse(const RrInstance *inst, gchar *colorname)
  22 {
  23     XColor xcol;
  24
  25     g_assert(colorname != NULL);
  26     /* get rgb values from colorname */
  27
  28     xcol.red = 0;
  29     xcol.green = 0;
  30     xcol.blue = 0;
  31     xcol.pixel = 0;
  32     if (!XParseColor(RrDisplay(inst), RrColormap(inst), colorname, &xcol)) {
  33         g_warning("unable to parse color '%s'", colorname);
  34         return NULL;
  35     }
  36     return RrColorNew(inst, xcol.red >> 8, xcol.green >> 8, xcol.blue >> 8);
  37 }
  38
  39 RrColor *RrColorNew(const RrInstance *inst, gint r, gint g, gint b)
  40 {
  41     /* this should be replaced with something far cooler */
  42     RrColor *out = NULL;
  43     XColor xcol;
  44     xcol.red = (r << 8) | r;
  45     xcol.green = (g << 8) | g;
  46     xcol.blue = (b << 8) | b;
  47     if (XAllocColor(RrDisplay(inst), RrColormap(inst), &xcol)) {
  48         out = g_new(RrColor, 1);
  49         out->inst = inst;
  50         out->r = xcol.red >> 8;
  51         out->g = xcol.green >> 8;
  52         out->b = xcol.blue >> 8;
  53         out->gc = None;
  54         out->pixel = xcol.pixel;
  55     }
  56     return out;
  57 }
  58
  59 /*XXX same color could be pointed to twice, this might have to be a refcount*/
  60
  61 void RrColorFree(RrColor *c)
  62 {
  63     if (c) {
  64         if (c->gc) XFreeGC(RrDisplay(c->inst), c->gc);
  65         g_free(c);
  66     }
  67 }
  68
  69 void reduce_depth(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) != default_red_offset) ||
  79             (RrBlueOffset(inst) != default_blue_offset) ||
  80             (RrGreenOffset(inst) != 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 << RrRedShift(inst))
  87                            + (g << RrGreenShift(inst))
  88                            + (b << RrBlueShift(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] >> default_red_offset) & 0xFF;
  99                 r = r >> RrRedShift(inst);
 100                 g = (data[x] >> default_green_offset) & 0xFF;
 101                 g = g >> RrGreenShift(inst);
 102                 b = (data[x] >> default_blue_offset) & 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] = pickColor(inst,
 117                                   data[x] >> default_red_offset,
 118                                   data[x] >> default_green_offset,
 119                                   data[x] >> default_blue_offset)->pixel;
 120         }
 121         data += im->width;
 122         p8 += im->bytes_per_line;
 123   }
 124
 125     break;
 126     default:
 127         g_message("your bit depth is currently unhandled\n");
 128     }
 129 }
 130
 131 XColor *pickColor(const RrInstance *inst, gint r, gint g, gint b)
 132 {
 133   r = (r & 0xff) >> (8-pseudo_bpc);
 134   g = (g & 0xff) >> (8-pseudo_bpc);
 135   b = (b & 0xff) >> (8-pseudo_bpc);
 136   return &RrPseudoColors(inst)[(r << (2*pseudo_bpc)) +
 137                                (g << (1*pseudo_bpc)) +
 138                                b];
 139 }
 140
 141 static void swap_byte_order(XImage *im)
 142 {
 143     int x, y, di;
 144
 145     g_message("SWAPPING BYTE ORDER");
 146
 147     di = 0;
 148     for (y = 0; y < im->height; ++y) {
 149         for (x = 0; x < im->height; ++x) {
 150             char *c = &im->data[di + x * im->bits_per_pixel / 8];
 151             char t;
 152
 153             switch (im->bits_per_pixel) {
 154             case 32:
 155                 t = c[2];
 156                 c[2] = c[3];
 157                 c[3] = t;
 158             case 16:
 159                 t = c[0];
 160                 c[0] = c[1];
 161                 c[1] = t;
 162             case 8:
 163                 break;
 164             default:
 165                 g_message("your bit depth is currently unhandled\n");
 166             }
 167         }
 168         di += im->bytes_per_line;
 169     }
 170
 171     if (im->byte_order == LSBFirst)
 172         im->byte_order = MSBFirst;
 173     else
 174         im->byte_order = LSBFirst;
 175 }
 176
 177 void increase_depth(const RrInstance *inst, RrPixel32 *data, XImage *im)
 178 {
 179     int r, g, b;
 180     int x,y;
 181     RrPixel32 *p32 = (RrPixel32 *) im->data;
 182     RrPixel16 *p16 = (RrPixel16 *) im->data;
 183     unsigned char *p8 = (unsigned char *)im->data;
 184
 185     if (im->byte_order != render_endian)
 186         swap_byte_order(im);
 187
 188     switch (im->bits_per_pixel) {
 189     case 32:
 190         for (y = 0; y < im->height; y++) {
 191             for (x = 0; x < im->width; x++) {
 192                 r = (p32[x] >> RrRedOffset(inst)) & 0xff;
 193                 g = (p32[x] >> RrGreenOffset(inst)) & 0xff;
 194                 b = (p32[x] >> RrBlueOffset(inst)) & 0xff;
 195                 data[x] = (r << default_red_offset)
 196                     + (g << default_green_offset)
 197                     + (b << default_blue_offset)
 198                     + (0xff << default_alpha_offset);
 199             }
 200             data += im->width;
 201             p32 += im->bytes_per_line/4;
 202         }
 203         break;
 204     case 16:
 205         for (y = 0; y < im->height; y++) {
 206             for (x = 0; x < im->width; x++) {
 207                 r = (p16[x] & RrRedMask(inst)) >>
 208                     RrRedOffset(inst) <<
 209                     RrRedShift(inst);
 210                 g = (p16[x] & RrGreenMask(inst)) >>
 211                     RrGreenOffset(inst) <<
 212                     RrGreenShift(inst);
 213                 b = (p16[x] & RrBlueMask(inst)) >>
 214                     RrBlueOffset(inst) <<
 215                     RrBlueShift(inst);
 216                 data[x] = (r << default_red_offset)
 217                     + (g << default_green_offset)
 218                     + (b << default_blue_offset)
 219                     + (0xff << default_alpha_offset);
 220             }
 221             data += im->width;
 222             p16 += im->bytes_per_line/2;
 223         }
 224         break;
 225     case 8:
 226         g_message("this image bit depth is currently unhandled\n");
 227         break;
 228     case 1:
 229         for (y = 0; y < im->height; y++) {
 230             for (x = 0; x < im->width; x++) {
 231                 if (!(((p8[x / 8]) >> (x % 8)) & 0x1))
 232                     data[x] = 0xff << default_alpha_offset; /* black */
 233                 else
 234                     data[x] = 0xffffffff; /* white */
 235             }
 236             data += im->width;
 237             p8 += im->bytes_per_line;
 238         }
 239         break;
 240     default:
 241         g_message("this image bit depth is currently unhandled\n");
 242     }
 243 }