osmesa: fix broken triangle/line drawing when using float color buffer

Doesn't seem to help with bug 71363 but it fixed a failure I found in
my testing.

Cc: "9.2" <[email protected]>
Cc: "10.0" <[email protected]>
(cherry picked from commit a66a008b17872f3eab91b7d04dd70e4537bdb627)

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;