H. Verbeet : wined3d: Fixup the write mask for gl_FogFragCoord and gl_PointSize.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: b28bd67fd9a117a5261c93e1da123b81b3ebea5a
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=b28bd67fd9a117a5261c93e1da123b81b3ebea5a

Author: H. Verbeet <hverbeet at gmail.com>
Date:   Mon Jan 15 19:30:35 2007 +0100

wined3d: Fixup the write mask for gl_FogFragCoord and gl_PointSize.

gl_FogFragCoord and gl_PointSize are floats rather than vec4s in GLSL,
so they shouldn't have a destination swizzle, and the write mask we
return should consist of only the first component.

---

 dlls/wined3d/glsl_shader.c |   17 +++++++++++------
 1 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/dlls/wined3d/glsl_shader.c b/dlls/wined3d/glsl_shader.c
index 7d88e0e..51c7d32 100644
--- a/dlls/wined3d/glsl_shader.c
+++ b/dlls/wined3d/glsl_shader.c
@@ -725,12 +725,17 @@ static DWORD shader_glsl_get_write_mask(
     char *ptr = write_mask;
     DWORD mask = param & WINED3DSP_WRITEMASK_ALL;
 
-    if (mask != WINED3DSP_WRITEMASK_ALL) {
-        *ptr++ = '.';
-        if (param & WINED3DSP_WRITEMASK_0) *ptr++ = 'x';
-        if (param & WINED3DSP_WRITEMASK_1) *ptr++ = 'y';
-        if (param & WINED3DSP_WRITEMASK_2) *ptr++ = 'z';
-        if (param & WINED3DSP_WRITEMASK_3) *ptr++ = 'w';
+    /* gl_FogFragCoord and glPointSize are floats, fixup the write mask. */
+    if ((shader_get_regtype(param) == WINED3DSPR_RASTOUT) && ((param & WINED3DSP_REGNUM_MASK) != 0)) {
+        mask = WINED3DSP_WRITEMASK_0;
+    } else {
+        if (mask != WINED3DSP_WRITEMASK_ALL) {
+            *ptr++ = '.';
+            if (param & WINED3DSP_WRITEMASK_0) *ptr++ = 'x';
+            if (param & WINED3DSP_WRITEMASK_1) *ptr++ = 'y';
+            if (param & WINED3DSP_WRITEMASK_2) *ptr++ = 'z';
+            if (param & WINED3DSP_WRITEMASK_3) *ptr++ = 'w';
+        }
     }
 
     *ptr = '\0';