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-rw-r--r--src/mesa/state_tracker/st_cb_fbo.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/mesa/state_tracker/st_cb_fbo.c b/src/mesa/state_tracker/st_cb_fbo.c
index 70baa9965de..daa94df92b8 100644
--- a/src/mesa/state_tracker/st_cb_fbo.c
+++ b/src/mesa/state_tracker/st_cb_fbo.c
@@ -680,7 +680,10 @@ st_DrawBuffers(struct gl_context *ctx, GLsizei count, const GLenum *buffers)
/* add the renderbuffers on demand */
for (i = 0; i < fb->_NumColorDrawBuffers; i++) {
gl_buffer_index idx = fb->_ColorDrawBufferIndexes[i];
- st_manager_add_color_renderbuffer(st, fb, idx);
+
+ if (idx >= 0) {
+ st_manager_add_color_renderbuffer(st, fb, idx);
+ }
}
}