GPUState: Fix scissor state being overwritten when changing scissor bounds

Fix T79899 viewport artifacts when sculpting
2020-08-24 12:28:54 +02:00
parent 4883cc5728
commit cb8da6efce
1 changed files with 2 additions and 1 deletions
--- a/source/blender/gpu/intern/gpu_state.cc
+++ b/source/blender/gpu/intern/gpu_state.cc
@@ -201,7 +201,8 @@ void GPU_scissor(int x, int y, int width, int height)
 {
  GPUStateManager *stack = GPU_context_active_get()->state_manager;
  auto &state = stack->mutable_state;
-  int scissor_rect[4] = {x, y, width, height};
+  bool enabled = state.scissor_rect[2] > 0;
+  int scissor_rect[4] = {x, y, enabled ? width : -width, height};
  copy_v4_v4_int(state.scissor_rect, scissor_rect);
 }