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

   1 #include <X11/Xlib.h>
   2 #include <X11/Xutil.h>
   3 #include "render.h"
   4 #include "color.h"
   5 #include "../kernel/openbox.h"
   6
   7 XColor *pseudo_colors;
   8 int pseudo_bpc;
   9
  10 void color_allocate_gc(color_rgb *in)
  11 {
  12     XGCValues gcv;
  13
  14     gcv.foreground = in->pixel;
  15     gcv.cap_style = CapProjecting;
  16     in->gc = XCreateGC(ob_display, ob_root, GCForeground | GCCapStyle, &gcv);
  17 }
  18
  19 color_rgb *color_parse(char *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(ob_display, render_colormap, colorname, &xcol)) {
  31         g_warning("unable to parse color '%s'", colorname);
  32         return NULL;
  33     }
  34     return color_new(xcol.red >> 8, xcol.green >> 8, xcol.blue >> 8);
  35 }
  36
  37 color_rgb *color_new(int r, int g, int b)
  38 {
  39 /* this should be replaced with something far cooler */
  40     color_rgb *out;
  41     XColor xcol;
  42     xcol.red = (r << 8) | r;
  43     xcol.green = (g << 8) | g;
  44     xcol.blue = (b << 8) | b;
  45     if (XAllocColor(ob_display, render_colormap, &xcol)) {
  46         out = g_new(color_rgb, 1);
  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         return out;
  53     }
  54     return NULL;
  55 }
  56
  57 /*XXX same color could be pointed to twice, this might have to be a refcount*/
  58
  59 void color_free(color_rgb *c)
  60 {
  61     if (c->gc != None)
  62         XFreeGC(ob_display, c->gc);
  63     g_free(c);
  64 }
  65
  66 void reduce_depth(pixel32 *data, XImage *im)
  67 {
  68     /* since pixel32 is the largest possible pixel size, we can share the
  69        array*/
  70     int r, g, b;
  71     int x,y;
  72     pixel16 *p16 = (pixel16*) data;
  73     unsigned char *p8 = (unsigned char *)data;
  74     switch (im->bits_per_pixel) {
  75     case 32:
  76         if ((render_red_offset != default_red_shift) ||
  77             (render_blue_offset != default_blue_shift) ||
  78             (render_green_offset != default_green_shift)) {
  79             for (y = 0; y < im->height; y++) {
  80                 for (x = 0; x < im->width; x++) {
  81                     r = (data[x] >> default_red_shift) & 0xFF;
  82                     g = (data[x] >> default_green_shift) & 0xFF;
  83                     b = (data[x] >> default_blue_shift) & 0xFF;
  84                     data[x] = (r << render_red_offset) + (g << render_green_offset) +
  85                         (b << render_blue_offset);
  86                 }
  87                 data += im->width;
  88             }
  89         }
  90         break;
  91     case 16:
  92         for (y = 0; y < im->height; y++) {
  93             for (x = 0; x < im->width; x++) {
  94                 r = (data[x] >> default_red_shift) & 0xFF;
  95                 r = r >> render_red_shift;
  96                 g = (data[x] >> default_green_shift) & 0xFF;
  97                 g = g >> render_green_shift;
  98                 b = (data[x] >> default_blue_shift) & 0xFF;
  99                 b = b >> render_blue_shift;
 100                 p16[x] = (r << render_red_offset)
 101                     + (g << render_green_offset)
 102                     + (b << render_blue_offset);
 103             }
 104             data += im->width;
 105             p16 += im->bytes_per_line/2;
 106         }
 107     break;
 108     case 8:
 109         g_assert(render_visual->class != TrueColor);
 110         for (y = 0; y < im->height; y++) {
 111             for (x = 0; x < im->width; x++) {
 112                 p8[x] = pickColor(data[x] >> default_red_shift,
 113                        data[x] >> default_green_shift,
 114                        data[x] >> default_blue_shift)->pixel;
 115         }
 116         data += im->width;
 117         p8 += im->bytes_per_line;
 118   }
 119
 120     break;
 121     default:
 122         g_message("your bit depth is currently unhandled\n");
 123     }
 124 }
 125 XColor *pickColor(int r, int g, int b)
 126 {
 127   r = (r & 0xff) >> (8-pseudo_bpc);
 128   g = (g & 0xff) >> (8-pseudo_bpc);
 129   b = (b & 0xff) >> (8-pseudo_bpc);
 130   return &pseudo_colors[(r << (2*pseudo_bpc)) + (g << (1*pseudo_bpc)) + b];
 131 }