Add latency to surface updats

maplibre · Nov 28, 2024 · 22acf40 · 22acf40
1 parent 4878005
commit 22acf40
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Showing 2 changed files with 12 additions and 2 deletions.
diff --git a/include/mbgl/vulkan/context.hpp b/include/mbgl/vulkan/context.hpp
@@ -146,7 +146,7 @@ class Context final : public gfx::Context {
     void enqueueDeletion(std::function<void(Context&)>&& function);
     void submitOneTimeCommand(const std::function<void(const vk::UniqueCommandBuffer&)>& function) const;
 
-    void requestSurfaceUpdate() { surfaceUpdateRequested = true; }
+    void requestSurfaceUpdate();
 
 private:
     struct FrameResources {
@@ -197,6 +197,7 @@ class Context final : public gfx::Context {
     uint8_t frameResourceIndex = 0;
     std::vector<FrameResources> frameResources;
     bool surfaceUpdateRequested{false};
+    int32_t surfaceUpdateLatency{0};
     int32_t currentFrameCount{0};
 
     struct {

diff --git a/src/mbgl/vulkan/context.cpp b/src/mbgl/vulkan/context.cpp
@@ -171,6 +171,15 @@ void Context::submitOneTimeCommand(const std::function<void(const vk::UniqueComm
     }
 }
 
+void Context::requestSurfaceUpdate() {
+    if (surfaceUpdateLatency) {
+        return;
+    }
+
+    surfaceUpdateRequested = true;
+    surfaceUpdateLatency = backend.getMaxFrames() * 3;
+}
+
 void Context::waitFrame() const {
     MLN_TRACE_FUNC();
     const auto& device = backend.getDevice();
@@ -203,7 +212,7 @@ void Context::beginFrame() {
         }
     }
 
-    if (platformSurface && surfaceUpdateRequested) {
+    if (platformSurface && surfaceUpdateRequested && --surfaceUpdateLatency == 0) {
         renderableResource.recreateSwapchain();
 
         // we wait for an idle device to recreate the swapchain