diff options
Diffstat (limited to 'src/mesa/main/ff_fragment_shader.cpp')
| -rw-r--r-- | src/mesa/main/ff_fragment_shader.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/mesa/main/ff_fragment_shader.cpp b/src/mesa/main/ff_fragment_shader.cpp index 2ce81fef61e..3d7947bae10 100644 --- a/src/mesa/main/ff_fragment_shader.cpp +++ b/src/mesa/main/ff_fragment_shader.cpp @@ -489,6 +489,12 @@ static GLuint make_state_key( struct gl_context *ctx, struct state_key *key ) /* _NEW_BUFFERS */ key->num_draw_buffers = ctx->DrawBuffer->_NumColorDrawBuffers; + /* _NEW_COLOR */ + if (ctx->Color.AlphaEnabled && key->num_draw_buffers == 0) { + /* if alpha test is enabled we need to emit at least one color */ + key->num_draw_buffers = 1; + } + key->inputs_available = (inputs_available & inputs_referenced); /* compute size of state key, ignoring unused texture units */ |