added depth reduction and startup for true color visuals

16bpp should now work

render/color.c

@@ -58,3 +58,48 @@ void color_free(color_rgb *c)
         XFreeGC(ob_display, c->gc);
     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");
+  }
+}

render/color.h

@@ -2,6 +2,37 @@
 #define __color_h
 
 #include <X11/Xlib.h>
+#include <X11/Xutil.h>
+
+#ifdef HAVE_STDINT_H 
+#  include <stdint.h>
+#else
+#  ifdef HAVE_SYS_TYPES_H
+#    include <sys/types.h>
+#  endif   
+#endif
+
+
+#ifdef HAVE_STDINT_H
+typedef uint32_t pixel32;
+typedef uint16_t pixel16;
+#else
+typedef u_int32_t pixel32;  
+typedef u_int16_t pixel16;   
+#endif /* HAVE_STDINT_H */  
+
+#if (G_ENDIAN == G_BIG_ENDIAN)
+#define default_red_shift 0
+#define default_green_shift 8
+#define default_blue_shift 16
+#define endian MSBFirst  
+#else
+#define default_red_shift 16
+#define default_green_shift 8
+#define default_blue_shift 0
+#define endian LSBFirst
+#endif /* G_ENDIAN == G_BIG_ENDIAN */
+
 
 typedef struct color_rgb {
     int r;
@@ -15,5 +46,14 @@ void color_allocate_gc(color_rgb *in);
 color_rgb *color_parse(char *colorname);
 color_rgb *color_new(int r, int g, int b);
 void color_free(color_rgb *in);
+void reduce_depth(pixel32 *data, XImage *im);
+
+extern int render_red_offset;
+extern int render_green_offset;
+extern int render_blue_offset;
+
+extern int render_red_shift;
+extern int render_green_shift;
+extern int render_blue_shift;
 
 #endif /* __color_h */

render/render.c

@@ -5,11 +5,14 @@
 #include "gradient.h"
 #include "font.h"
 #include "mask.h"
+#include "color.h"
 #include "../kernel/openbox.h"
 
 int render_depth;
 Visual *render_visual;
 Colormap render_colormap;
+int render_red_offset = 0, render_green_offset = 0, render_blue_offset = 0;
+int render_red_shift, render_green_shift, render_blue_shift;
 
 void render_startup(void)
 {
@@ -52,18 +55,46 @@ void render_startup(void)
       }
       XFree(vinfo_return);
     }  
+  truecolor_startup();
+}
+
+void truecolor_startup(void)
+{
+  unsigned long red_mask, green_mask, blue_mask;
+  XImage *timage = NULL;
+
+  timage = XCreateImage(ob_display, render_visual, render_depth,
+                        ZPixmap, 0, NULL, 1, 1, 32, 0);
+  g_assert(timage != NULL);
+  // find the offsets for each color in the visual's masks
+  red_mask = timage->red_mask;
+  green_mask = timage->green_mask;
+  blue_mask = timage->blue_mask;
+
+  render_red_offset = 0;
+  render_green_offset = 0;
+  render_blue_offset = 0;
+
+  while (! (red_mask & 1))   { render_red_offset++;   red_mask   >>= 1; }
+  while (! (green_mask & 1)) { render_green_offset++; green_mask >>= 1; }
+  while (! (blue_mask & 1))  { render_blue_offset++;  blue_mask  >>= 1; }
+
+  render_red_shift = render_green_shift = render_blue_shift = 8;
+  while (red_mask)   { red_mask   >>= 1; render_red_shift--;   }
+  while (green_mask) { green_mask >>= 1; render_green_shift--; }
+  while (blue_mask)  { blue_mask  >>= 1; render_blue_shift--;  }
+  XFree(timage);
 }
 
 void x_paint(Window win, Appearance *l, int x, int y, int w, int h)
 {
     int i;
-    XImage *im;
+    XImage *im = NULL;
     Pixmap oldp;
 
     if (w <= 0 || h <= 0) return;
 
     g_assert(l->surface.type == Surface_Planar);
-//    printf("painting window %ld\n", win);
 
     oldp = l->pixmap; /* save to free after changing the visible pixmap */
     l->pixmap = XCreatePixmap(ob_display, ob_root, x+w, y+h, render_depth);
@@ -83,16 +114,16 @@ void x_paint(Window win, Appearance *l, int x, int y, int w, int h)
         gradient_solid(l, x, y, w, h);
     else gradient_render(&l->surface, w, h);
 
-/*reduce depth here...
-  also, this is not the right place for this code, it's only here so
+/*this is not the right place for this code, it's only here so
   text rendering shows up for now.
 */
     if (l->surface.data.planar.grad != Background_Solid) {
         im = XCreateImage(ob_display, render_visual, render_depth,
                           ZPixmap, 0, NULL, w, h, 32, 0);
-        g_assert(im != None);
+        g_assert(im != NULL);
         im->byte_order = endian;
-        im->data = l->surface.data.planar.pixel_data;
+        im->data = (unsigned char *)l->surface.data.planar.pixel_data;
+        reduce_depth(im->data, im);
         XPutImage(ob_display, l->pixmap, DefaultGC(ob_display, ob_screen),
                   im, 0, 0, x, y, w, h);
         im->data = NULL;

render/render.h

@@ -7,34 +7,6 @@
 #include <glib.h>
 #include "color.h"
 
-#ifdef HAVE_STDINT_H
-#  include <stdint.h>
-#else
-#  ifdef HAVE_SYS_TYPES_H
-#    include <sys/types.h>
-#  endif
-#endif
-
-#ifdef HAVE_STDINT_H
-typedef uint32_t pixel32;
-typedef uint16_t pixel16;
-#else
-typedef u_int32_t pixel32;
-typedef u_int16_t pixel16;
-#endif /* HAVE_STDINT_H */
-
-#if (G_ENDIAN == G_BIG_ENDIAN)
-#define default_red_shift 0
-#define default_green_shift 8
-#define default_blue_shift 16
-#define endian MSBFirst
-#else
-#define default_red_shift 16
-#define default_green_shift 8
-#define default_blue_shift 0
-#define endian LSBFirst
-#endif /* G_ENDIAN == G_BIG_ENDIAN */
-
 typedef enum {
     Surface_Planar,
     Surface_Nonplanar
@@ -164,4 +136,5 @@ void render_shutdown(void);
 Appearance *appearance_new(SurfaceType type, int numtex);
 Appearance *appearance_copy(Appearance *a);
 void appearance_free(Appearance *a);
+void truecolor_startup(void);
 #endif /*__render_h*/