X-Git-Url: https://git.brokenzipper.com/gitweb?a=blobdiff_plain;f=render%2Ffont.c;h=369f262e6e6b70adcd6f936df0fb33569b1d314b;hb=a161f4e812b2cc0428eef560feb0b71fc8068ffb;hp=8d389d8b5e81b73ff5015d3ee2743c09cb313f0d;hpb=77baf26a7f2f64ddf1274035fd4991ab17345904;p=chaz%2Fopenbox

diff --git a/render/font.c b/render/font.c
index 8d389d8b..369f262e 100644
--- a/render/font.c
+++ b/render/font.c
@@ -258,9 +258,20 @@ void RrFontDraw(XftDraw *d, RrTextureText *t, RrRect *area)
     }
 
     if (t->shadow_offset_x || t->shadow_offset_y) {
-        c.color.red = t->shadow_color->r | t->shadow_color->r << 8;
-        c.color.green = t->shadow_color->g | t->shadow_color->g << 8;
-        c.color.blue = t->shadow_color->b | t->shadow_color->b << 8;
+        /* From nvidia's readme (chapter 23):
+
+           When rendering to a 32-bit window, keep in mind that the X RENDER
+           extension, used by most composite managers, expects "premultiplied
+           alpha" colors. This means that if your color has components (r,g,b)
+           and alpha value a, then you must render (a*r, a*g, a*b, a) into the
+           target window.
+        */
+        c.color.red = (t->shadow_color->r | t->shadow_color->r << 8) *
+            t->shadow_alpha / 255;
+        c.color.green = (t->shadow_color->g | t->shadow_color->g << 8) *
+            t->shadow_alpha / 255;
+        c.color.blue = (t->shadow_color->b | t->shadow_color->b << 8) *
+            t->shadow_alpha / 255;
         c.color.alpha = 0xffff * t->shadow_alpha / 255;
         c.pixel = t->shadow_color->pixel;
 
@@ -278,11 +289,11 @@ void RrFontDraw(XftDraw *d, RrTextureText *t, RrRect *area)
     c.pixel = t->color->pixel;
 
     if (t->shortcut) {
-        const gchar *c = t->string + t->shortcut_pos;
+        const gchar *s = t->string + t->shortcut_pos;
 
         t->font->shortcut_underline->start_index = t->shortcut_pos;
         t->font->shortcut_underline->end_index = t->shortcut_pos +
-            (g_utf8_next_char(c) - c);
+            (g_utf8_next_char(s) - s);
 
         /* the attributes are owned by the layout.
            re-add the attributes to the layout after changing the