diff options
Diffstat (limited to 'src/mesa/drivers/dri/unichrome/via_state.c')
| -rw-r--r-- | src/mesa/drivers/dri/unichrome/via_state.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/src/mesa/drivers/dri/unichrome/via_state.c b/src/mesa/drivers/dri/unichrome/via_state.c index f0c8e8868c..6b16a17f96 100644 --- a/src/mesa/drivers/dri/unichrome/via_state.c +++ b/src/mesa/drivers/dri/unichrome/via_state.c @@ -784,7 +784,11 @@ static void viaPolygonStipple( GLcontext *ctx, const GLubyte *mask ) GLubyte *s = (GLubyte *)vmesa->stipple; int i; - /* Fallback for the CLE266 case as it doesn't seem to work */ + /* Fallback for the CLE266 case. Stipple works on the CLE266, but + * the stipple x/y offset registers don't seem to be respected, + * meaning that when drawXoff != 0, the stipple is rotated left or + * right by a few pixels, giving incorrect results. + */ if (vmesa->viaScreen->deviceID == VIA_CLE266) { FALLBACK( vmesa, VIA_FALLBACK_STIPPLE, ctx->Polygon.StippleFlag); } else { @@ -1599,6 +1603,17 @@ void viaValidateState( GLcontext *ctx ) else vmesa->regEnable &= ~HC_HenCS_MASK; + /* CLE266 gets this wrong at least: Pixels which fail alpha test + * are incorrectly writen to the z buffer. This is a pretty big + * slowdown, it would be good to find out this wasn't necessary: + */ + if (vmesa->viaScreen->deviceID == VIA_CLE266) { + GLboolean fallback = (ctx->Color.AlphaEnabled && + ctx->Color.AlphaFunc != GL_ALWAYS && + ctx->Depth.Mask); + FALLBACK( vmesa, VIA_FALLBACK_ALPHATEST, fallback ); + } + vmesa->newEmitState |= vmesa->newState; vmesa->newState = 0; } |