fix: metal sync issue

Author: hoffstadt

extensions/pl_graphics_metal.m

@@ -1934,6 +1934,7 @@
     // Wait until the inflight command buffer has completed its work
     // gptGraphics->tSwapchain.uCurrentImageIndex = gptGraphics->uCurrentFrameIndex;
     plFrameContext* ptFrame = pl__get_frame_resources(ptDevice);
+    ptFrame->uCurrentBufferIndex = 0;
     [ptFrame->tFrameBoundaryEvent waitUntilSignaledValue:ptFrame->uNextValue timeoutMS:10000];
 
     pl__garbage_collect(ptDevice); 
@@ -2017,7 +2018,6 @@
         }
     }
 
-    ptFrame->uCurrentBufferIndex = 0;
     [ptCommandBuffer->tCmdBuffer encodeSignalEvent:ptFrame->tFrameBoundaryEvent value:++ptFrame->uNextValue];
     [ptCommandBuffer->tCmdBuffer commit];
     gptGraphics->uCurrentFrameIndex = (gptGraphics->uCurrentFrameIndex + 1) % gptGraphics->uFramesInFlight;

extensions/pl_renderer_ext.c

@@ -3196,7 +3196,6 @@ pl_renderer_render_view(plView* ptView, plCamera* ptCamera, plCamera* ptCullCame
         .atSignalSempahores      = {gptStarter->get_current_timeline_semaphore()},
         .auSignalSemaphoreValues = {gptStarter->increment_current_timeline_value()}
     };
-    ptScene->uLastSemValueForShadow = gptStarter->get_current_timeline_value();
     gptGfx->submit_command_buffer(ptSceneCmdBuffer, &tSceneSubmitInfo);
     gptGfx->return_command_buffer(ptSceneCmdBuffer);
 
@@ -3427,7 +3426,7 @@ pl_renderer_render_view(plView* ptView, plCamera* ptCamera, plCamera* ptCullCame
         .atSignalSempahores      = {gptStarter->get_current_timeline_semaphore()},
         .auSignalSemaphoreValues = {gptStarter->increment_current_timeline_value()}
     };
-
+    ptScene->uLastSemValueForShadow = gptStarter->get_current_timeline_value();
     gptGfx->submit_command_buffer(ptPostCmdBuffer, &tPostSubmitInfo);
     gptGfx->return_command_buffer(ptPostCmdBuffer);