Fix CUDA error when using tiny border in viewport

Need to clamp scaled render buffers window to be above zero
when applying resolution divider.

1 files changed, 4 insertions, 4 deletions

diff --git a/intern/cycles/integrator/path_trace.cpp b/intern/cycles/integrator/path_trace.cpp
index daf270d6686..f3a08b1659c 100644
--- a/intern/cycles/integrator/path_trace.cpp
+++ b/intern/cycles/integrator/path_trace.cpp
@@ -296,13 +296,13 @@ static BufferParams scale_buffer_params(const BufferParams &params, int resoluti
 
   scaled_params.window_x = params.window_x / resolution_divider;
   scaled_params.window_y = params.window_y / resolution_divider;
-  scaled_params.window_width = params.window_width / resolution_divider;
-  scaled_params.window_height = params.window_height / resolution_divider;
+  scaled_params.window_width = max(1, params.window_width / resolution_divider);
+  scaled_params.window_height = max(1, params.window_height / resolution_divider);
 
   scaled_params.full_x = params.full_x / resolution_divider;
   scaled_params.full_y = params.full_y / resolution_divider;
-  scaled_params.full_width = params.full_width / resolution_divider;
-  scaled_params.full_height = params.full_height / resolution_divider;
+  scaled_params.full_width = max(1, params.full_width / resolution_divider);
+  scaled_params.full_height = max(1, params.full_height / resolution_divider);
 
   scaled_params.update_offset_stride();