From fb01c5ea4c5b9f0c2b0d2b2d9c926cf1caea27c0 Mon Sep 17 00:00:00 2001

From: Damien Leone <dleone@nvidia.nvidia.com>

Date: Mon, 12 Sep 2011 09:53:00 -0700

Subject: [PATCH] Bug 625202 - 30-bit drawables remain black

This patch adds support for 10-10-10 bitmask BGR conversion at

depths 30 and 32 by preventing gdk_rgb_select_conv() from failing

back to the gdk_rgb_convert_32_generic() conversion function.

                                                                                                   Since GdkImage codes R, G and B channels in a char, we replicate   the two most significant bits to the two least significant ones such that all 10 bits are used (i.e. all bits are set to 1 for  white color).

/* Since the R, G and B channels are coded in a char, we

+                  * replicate the two most significant bits to the two least                      

+                  * significant ones. */                                                          

+                 *((guint32*)p) = 0x3 << 30 |

+                       b << 22 | (b >> 6) << 20 |

+                       g << 12 | (g >> 6) << 10 |

+                       r << 2  | (r >> 6);