Henri Verbeet : wined3d: Simplify the transformed position fixup a bit.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 37491bb5d1f9bdb9b68929b6fe38114fe22674eb
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=37491bb5d1f9bdb9b68929b6fe38114fe22674eb

Author: Henri Verbeet <hverbeet at codeweavers.com>
Date:   Mon Jun 22 10:15:57 2009 +0200

wined3d: Simplify the transformed position fixup a bit.

---

 dlls/wined3d/buffer.c  |   26 +++++++-------------------
 dlls/wined3d/directx.c |    9 ++++++---
 2 files changed, 13 insertions(+), 22 deletions(-)

diff --git a/dlls/wined3d/buffer.c b/dlls/wined3d/buffer.c
index e9f3ff6..8896db9 100644
--- a/dlls/wined3d/buffer.c
+++ b/dlls/wined3d/buffer.c
@@ -506,27 +506,15 @@ static inline void fixup_d3dcolor(DWORD *dst_color)
 
 static inline void fixup_transformed_pos(float *p)
 {
-    float x, y, z, w;
-
-    /* rhw conversion like in drawStridedSlow */
-    if (p[3] == 1.0 || ((p[3] < eps) && (p[3] > -eps)))
-    {
-        x = p[0];
-        y = p[1];
-        z = p[2];
-        w = 1.0;
-    }
-    else
+    /* rhw conversion like in position_float4(). */
+    if (p[3] != 1.0 && p[3] != 0.0)
     {
-        w = 1.0 / p[3];
-        x = p[0] * w;
-        y = p[1] * w;
-        z = p[2] * w;
+        float w = 1.0 / p[3];
+        p[0] *= w;
+        p[1] *= w;
+        p[2] *= w;
+        p[3] = w;
     }
-    p[0] = x;
-    p[1] = y;
-    p[2] = z;
-    p[3] = w;
 }
 
 const BYTE *buffer_get_memory(IWineD3DBuffer *iface, UINT offset, GLuint *buffer_object)
diff --git a/dlls/wined3d/directx.c b/dlls/wined3d/directx.c
index 28f07ef..df5d4cc 100644
--- a/dlls/wined3d/directx.c
+++ b/dlls/wined3d/directx.c
@@ -4316,13 +4316,16 @@ static void WINE_GLAPI position_float4(const void *data)
 {
     const GLfloat *pos = data;
 
-    if (pos[3] < eps && pos[3] > -eps)
-        glVertex3fv(pos);
-    else {
+    if (pos[3] != 0.0 && pos[3] != 1.0)
+    {
         float w = 1.0 / pos[3];
 
         glVertex4f(pos[0] * w, pos[1] * w, pos[2] * w, w);
     }
+    else
+    {
+        glVertex3fv(pos);
+    }
 }
 
 static void WINE_GLAPI diffuse_d3dcolor(const void *data)