Dominique Leuenberger
8111e3162c
fix black drawing areas on 30-bit displays #bgo625202 gtk2.changes notice is in sequence to GNOME:Factory package OBS-URL: https://build.opensuse.org/request/show/243668 OBS-URL: https://build.opensuse.org/package/show/GNOME:Factory/gtk2?expand=0&rev=208
85 lines
2.4 KiB
Diff
85 lines
2.4 KiB
Diff
From fb01c5ea4c5b9f0c2b0d2b2d9c926cf1caea27c0 Mon Sep 17 00:00:00 2001
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From: Damien Leone <dleone@nvidia.nvidia.com>
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Date: Mon, 12 Sep 2011 09:53:00 -0700
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Subject: [PATCH] Bug 625202 - 30-bit drawables remain black
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This patch adds support for 10-10-10 bitmask BGR conversion at
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depths 30 and 32 by preventing gdk_rgb_select_conv() from failing
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back to the gdk_rgb_convert_32_generic() conversion function.
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Since GdkImage codes R, G and B channels in a char, we replicate
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the two most significant bits to the two least significant ones
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such that all 10 bits are used (i.e. all bits are set to 1 for
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white color).
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---
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gdk/gdkrgb.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
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1 files changed, 47 insertions(+), 0 deletions(-)
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diff --git a/gdk/gdkrgb.c b/gdk/gdkrgb.c
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index 6e32bab..93ef6ab 100644
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--- a/gdk/gdkrgb.c
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+++ b/gdk/gdkrgb.c
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@@ -2242,6 +2242,48 @@ gdk_rgb_convert_8880_br (GdkRgbInfo *image_info, GdkImage *image,
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}
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}
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+static void
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+gdk_rgb_convert_0AAA_br (GdkRgbInfo *image_info, GdkImage *image,
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+ gint x0, gint y0, gint width, gint height,
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+ const guchar *buf, int rowstride,
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+ gint x_align, gint y_align, GdkRgbCmap *cmap)
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+{
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+ int y, w;
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+ guchar *obuf, *p;
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+ gint bpl;
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+ const guchar *bptr, *bp2;
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+ guchar r, g, b;
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+
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+ bptr = buf;
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+ bpl = image->bpl;
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+ obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 4;
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+
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+ for (y = 0; y < height; y++)
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+ {
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+ bp2 = bptr;
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+ p = obuf;
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+ w = width;
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+ while (w--)
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+ {
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+ r = *bp2++;
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+ g = *bp2++;
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+ b = *bp2++;
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+
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+ /* Since the R, G and B channels are coded in a char, we
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+ * replicate the two most significant bits to the two least
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+ * significant ones. */
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+ *((guint32*)p) = 0x3 << 30 |
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+ b << 22 | (b >> 6) << 20 |
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+ g << 12 | (g >> 6) << 10 |
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+ r << 2 | (r >> 6);
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+
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+ p += 4;
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+ }
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+ bptr += rowstride;
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+ obuf += bpl;
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+ }
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+}
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+
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/* Generic truecolor/directcolor conversion function. Slow, but these
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are oddball modes. */
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static void
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@@ -3195,6 +3237,11 @@ gdk_rgb_select_conv (GdkRgbInfo *image_info)
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#endif
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}
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#endif
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+ else if (bpp == 32 && (depth == 30 || depth == 32) &&
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+ vtype == GDK_VISUAL_TRUE_COLOR &&
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+ (red_mask == 0x3ff && green_mask == 0xffc00 &&
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+ blue_mask == 0x3ff00000 && byte_order == GDK_LSB_FIRST))
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+ conv = gdk_rgb_convert_0AAA_br;
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else if (vtype == GDK_VISUAL_TRUE_COLOR && byte_order == GDK_LSB_FIRST)
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{
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conv = gdk_rgb_convert_truecolor_lsb;
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--
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1.7.5.4
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