Fix T93125: Cycles wrong remaining render time with high number of samples

Avoid integer overflow.

1 files changed, 2 insertions, 1 deletions

diff --git a/intern/cycles/integrator/path_trace.cpp b/intern/cycles/integrator/path_trace.cpp
index f3a08b1659c..92bf8e69d19 100644
--- a/intern/cycles/integrator/path_trace.cpp
+++ b/intern/cycles/integrator/path_trace.cpp
@@ -847,7 +847,8 @@ void PathTrace::progress_update_if_needed(const RenderWork &render_work)
 {
   if (progress_ != nullptr) {
     const int2 tile_size = get_render_tile_size();
-    const int num_samples_added = tile_size.x * tile_size.y * render_work.path_trace.num_samples;
+    const uint64_t num_samples_added = uint64_t(tile_size.x) * tile_size.y *
+                                       render_work.path_trace.num_samples;
     const int current_sample = render_work.path_trace.start_sample +
                                render_work.path_trace.num_samples;
     progress_->add_samples(num_samples_added, current_sample);