diff options
Diffstat (limited to 'xc/extras/Mesa/src/FX/fxvs_tmp.h')
| -rw-r--r-- | xc/extras/Mesa/src/FX/fxvs_tmp.h | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/xc/extras/Mesa/src/FX/fxvs_tmp.h b/xc/extras/Mesa/src/FX/fxvs_tmp.h index e3a30bf5d..d9001db5e 100644 --- a/xc/extras/Mesa/src/FX/fxvs_tmp.h +++ b/xc/extras/Mesa/src/FX/fxvs_tmp.h @@ -142,10 +142,39 @@ static void NAME(struct vertex_buffer *VB, GLuint start, GLuint end) DO_SETUP; } } - } else + } + else { for (;v!=vend;v+=16 INCR) { DO_SETUP; } + } + + if (ctx->FogMode == FOG_FRAGMENT && ctx->ProjectionMatrix.m[15] != 0.0F) { + /* need to compute W values for fogging purposes */ + const GLfloat m10 = ctx->ProjectionMatrix.m[10]; + const GLfloat m14 = ctx->ProjectionMatrix.m[14]; + const GLfloat v10 = ctx->Viewport.WindowMap.m[10]; + const GLfloat v14 = ctx->Viewport.WindowMap.m[14]; + GLfloat *v = gWin[start].f; + GLfloat *win = VB->Win.data[start]; + if (VB->ClipOrMask) { + GLubyte *clipmask = &VB->ClipMask[start]; + for (;v!=vend;v+=16,clipmask++, win+=4) { + if (*clipmask == 0) { + GLfloat zNDC = (win[2] - v14) / v10; + GLfloat zEye = (zNDC - m14) / m10; + v[OOWCOORD] = -1.0F / zEye; + } + } + } + else { + for (;v!=vend;v+=16, win+=4) { + GLfloat zNDC = (win[2] - v14) / v10; + GLfloat zEye = (zNDC - m14) / m10; + v[OOWCOORD] = -1.0F / zEye; + } + } + } /* rare - I hope */ FIXUP; |