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 void color_allocate_gc(color_rgb *in)
   7 {
   8     XGCValues gcv;
   9
  10     gcv.foreground = in->pixel;
  11     gcv.cap_style = CapProjecting;
  12     in->gc = XCreateGC(ob_display, ob_root, GCForeground | GCCapStyle, &gcv);
  13 }
  14
  15 color_rgb *color_parse(char *colorname)
  16 {
  17     XColor xcol;
  18
  19     g_assert(colorname != NULL);
  20     // get rgb values from colorname
  21
  22     xcol.red = 0;
  23     xcol.green = 0;
  24     xcol.blue = 0;
  25     xcol.pixel = 0;
  26     if (!XParseColor(ob_display, render_colormap, colorname, &xcol)) {
  27         g_warning("unable to parse color '%s'", colorname);
  28         return NULL;
  29     }
  30     return color_new(xcol.red >> 8, xcol.green >> 8, xcol.blue >> 8);
  31 }
  32
  33 color_rgb *color_new(int r, int g, int b)
  34 {
  35 /* this should be replaced with something far cooler */
  36     color_rgb *out;
  37     XColor xcol;
  38     xcol.red = (r << 8) | r;
  39     xcol.green = (g << 8) | g;
  40     xcol.blue = (b << 8) | b;
  41     if (XAllocColor(ob_display, render_colormap, &xcol)) {
  42         out = g_new(color_rgb, 1);
  43         out->r = xcol.red >> 8;
  44         out->g = xcol.green >> 8;
  45         out->b = xcol.blue >> 8;
  46         out->gc = None;
  47         out->pixel = xcol.pixel;
  48         return out;
  49     }
  50     return NULL;
  51 }
  52
  53 //XXX same color could be pointed to twice, this might have to be a refcount
  54
  55 void color_free(color_rgb *c)
  56 {
  57     if (c->gc != None)
  58         XFreeGC(ob_display, c->gc);
  59     free(c);
  60 }
  61
  62 void reduce_depth(pixel32 *data, XImage *im)
  63 {
  64   // since pixel32 is the largest possible pixel size, we can share the array
  65   int r, g, b;
  66   int x,y;
  67   pixel16 *p = (pixel16*) data;
  68   switch (im->bits_per_pixel) {
  69   case 32:
  70     if ((render_red_offset != default_red_shift) ||
  71         (render_blue_offset != default_blue_shift) ||
  72         (render_green_offset != default_green_shift)) {
  73       for (y = 0; y < im->height; y++) {
  74         for (x = 0; x < im->width; x++) {
  75           r = (data[x] >> default_red_shift) & 0xFF;
  76           g = (data[x] >> default_green_shift) & 0xFF;
  77           b = (data[x] >> default_blue_shift) & 0xFF;
  78           data[x] = (r << render_red_offset) + (g << render_green_offset) +
  79             (b << render_blue_offset);
  80         }
  81         data += im->width;
  82       }
  83     }
  84     break;
  85   case 16:
  86     for (y = 0; y < im->height; y++) {
  87       for (x = 0; x < im->width; x++) {
  88         r = (data[x] >> default_red_shift) & 0xFF;
  89         r = r >> render_red_shift;
  90         g = (data[x] >> default_green_shift) & 0xFF;
  91         g = g >> render_green_shift;
  92         b = (data[x] >> default_blue_shift) & 0xFF;
  93         b = b >> render_blue_shift;
  94         p[x] = (r << render_red_offset)
  95              + (g << render_green_offset)
  96              + (b << render_blue_offset);
  97       }
  98       data += im->width;
  99       p += im->bytes_per_line/2;
 100     }
 101     break;
 102   default:
 103     g_message("your bit depth is currently unhandled\n");
 104   }
 105 }