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-rw-r--r--src/mesa/drivers/osmesa/osmesa.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/src/mesa/drivers/osmesa/osmesa.c b/src/mesa/drivers/osmesa/osmesa.c
index 102001edfa0..6f6f824b462 100644
--- a/src/mesa/drivers/osmesa/osmesa.c
+++ b/src/mesa/drivers/osmesa/osmesa.c
@@ -197,6 +197,14 @@ osmesa_choose_line_function( struct gl_context *ctx )
const OSMesaContext osmesa = OSMESA_CONTEXT(ctx);
const SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ if (ctx->DrawBuffer &&
+ ctx->DrawBuffer->Visual.redBits == 32) {
+ /* the special-case line functions in this file don't work
+ * for float color channels.
+ */
+ return NULL;
+ }
+
if (ctx->RenderMode != GL_RENDER) return NULL;
if (ctx->Line.SmoothFlag) return NULL;
if (ctx->Texture._EnabledUnits) return NULL;
@@ -298,6 +306,14 @@ osmesa_choose_triangle_function( struct gl_context *ctx )
const OSMesaContext osmesa = OSMESA_CONTEXT(ctx);
const SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ if (ctx->DrawBuffer &&
+ ctx->DrawBuffer->Visual.redBits == 32) {
+ /* the special-case triangle functions in this file don't work
+ * for float color channels.
+ */
+ return (swrast_tri_func) NULL;
+ }
+
if (ctx->RenderMode != GL_RENDER) return (swrast_tri_func) NULL;
if (ctx->Polygon.SmoothFlag) return (swrast_tri_func) NULL;
if (ctx->Polygon.StippleFlag) return (swrast_tri_func) NULL;