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-rw-r--r--src/mesa/swrast/s_span.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/src/mesa/swrast/s_span.c b/src/mesa/swrast/s_span.c
index bbde0025f4..f1e58bd3d8 100644
--- a/src/mesa/swrast/s_span.c
+++ b/src/mesa/swrast/s_span.c
@@ -64,8 +64,11 @@ _swrast_span_default_attribs(GLcontext *ctx, SWspan *span)
const GLfloat depthMax = ctx->DrawBuffer->_DepthMaxF;
if (ctx->DrawBuffer->Visual.depthBits <= 16)
span->z = FloatToFixed(ctx->Current.RasterPos[2] * depthMax + 0.5F);
- else
- span->z = (GLint) (ctx->Current.RasterPos[2] * depthMax + 0.5F);
+ else {
+ GLfloat tmpf = ctx->Current.RasterPos[2] * depthMax;
+ tmpf = MIN2(tmpf, depthMax);
+ span->z = (GLint)tmpf;
+ }
span->zStep = 0;
span->interpMask |= SPAN_Z;
}