add strict ansi compliance

[chaz/openbox] / render / color.c

diff --git a/render/color.c b/render/color.c
index 1f3892e5a120deba431a963c866eae2f7ca05336..0d3f81321a6c64c129b9e57e51c9cdc376a08f52 100644 (file)
--- a/render/color.c
+++ b/render/color.c
@@ -17,7 +17,7 @@ color_rgb *color_parse(char *colorname)
     XColor xcol;
 
     g_assert(colorname != NULL);
-    // get rgb values from colorname                                  
+    /* get rgb values from colorname */
 
     xcol.red = 0;
     xcol.green = 0;
@@ -50,9 +50,57 @@ color_rgb *color_new(int r, int g, int b)
     return NULL;
 }
 
+/*XXX same color could be pointed to twice, this might have to be a refcount*/
+
 void color_free(color_rgb *c)
 {
     if (c->gc != None)
         XFreeGC(ob_display, c->gc);
-    free(c);
+    g_free(c);
+}
+
+void reduce_depth(pixel32 *data, XImage *im)
+{
+    /* since pixel32 is the largest possible pixel size, we can share the
+       array*/
+    int r, g, b;
+    int x,y;
+    pixel16 *p = (pixel16*) data;
+    switch (im->bits_per_pixel) {
+    case 32:
+        if ((render_red_offset != default_red_shift) ||
+            (render_blue_offset != default_blue_shift) ||
+            (render_green_offset != default_green_shift)) {
+            for (y = 0; y < im->height; y++) {
+                for (x = 0; x < im->width; x++) {
+                    r = (data[x] >> default_red_shift) & 0xFF;
+                    g = (data[x] >> default_green_shift) & 0xFF;
+                    b = (data[x] >> default_blue_shift) & 0xFF;
+                    data[x] = (r << render_red_offset) + (g << render_green_offset) +
+                        (b << render_blue_offset);
+                }
+                data += im->width;
+            } 
+        }
+        break;
+    case 16:
+        for (y = 0; y < im->height; y++) {
+            for (x = 0; x < im->width; x++) {
+                r = (data[x] >> default_red_shift) & 0xFF;
+                r = r >> render_red_shift;
+                g = (data[x] >> default_green_shift) & 0xFF;
+                g = g >> render_green_shift;
+                b = (data[x] >> default_blue_shift) & 0xFF;
+                b = b >> render_blue_shift;
+                p[x] = (r << render_red_offset)
+                    + (g << render_green_offset)
+                    + (b << render_blue_offset);
+            }
+            data += im->width;
+            p += im->bytes_per_line/2;
+        }
+        break;
+    default:
+        g_message("your bit depth is currently unhandled\n");
+    }
 }