Fixed resize window validation errors with removing frame prerender once and present last but one frame functionality. Frame rate is still similar.
diff --git a/examples/vulkan_example/main.cpp b/examples/vulkan_example/main.cpp
index ca64792..1631c8d 100644
--- a/examples/vulkan_example/main.cpp
+++ b/examples/vulkan_example/main.cpp
@@ -12,9 +12,9 @@
#define IMGUI_MAX_POSSIBLE_BACK_BUFFERS 16
#define IMGUI_UNLIMITED_FRAME_RATE
-//#ifdef _DEBUG
-//#define IMGUI_VULKAN_DEBUG_REPORT
-//#endif
+#ifdef _DEBUG
+#define IMGUI_VULKAN_DEBUG_REPORT
+#endif
static VkAllocationCallbacks* g_Allocator = NULL;
static VkInstance g_Instance = VK_NULL_HANDLE;
@@ -568,19 +568,12 @@
static void frame_present()
{
VkResult err;
- // If IMGUI_UNLIMITED_FRAME_RATE is defined we present the latest but one frame. Otherwise we present the latest rendered frame
-#ifdef IMGUI_UNLIMITED_FRAME_RATE
- uint32_t PresentIndex = (g_FrameIndex + IMGUI_VK_QUEUED_FRAMES - 1) % IMGUI_VK_QUEUED_FRAMES;
-#else
- uint32_t PresentIndex = g_FrameIndex;
-#endif // IMGUI_UNLIMITED_FRAME_RATE
-
VkSwapchainKHR swapchains[1] = {g_Swapchain};
- uint32_t indices[1] = {g_BackbufferIndices[PresentIndex]};
+ uint32_t indices[1] = {g_BackbufferIndices[g_FrameIndex]};
VkPresentInfoKHR info = {};
info.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR;
info.waitSemaphoreCount = 1;
- info.pWaitSemaphores = &g_RenderCompleteSemaphore[PresentIndex];
+ info.pWaitSemaphores = &g_RenderCompleteSemaphore[g_FrameIndex];
info.swapchainCount = 1;
info.pSwapchains = swapchains;
info.pImageIndices = indices;
@@ -678,16 +671,6 @@
bool show_another_window = false;
ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
- // When IMGUI_UNLIMITED_FRAME_RATE is defined we render into latest image acquired from the swapchain but we display the image which was rendered before.
- // Hence we must render once and increase the g_FrameIndex without presenting, which we do before entering the render loop.
- // This is also the reason why frame_end() is split into frame_end() and frame_present(), the later one not being called here.
-#ifdef IMGUI_UNLIMITED_FRAME_RATE
- ImGui_ImplGlfwVulkan_NewFrame();
- frame_begin();
- ImGui_ImplGlfwVulkan_Render(g_CommandBuffer[g_FrameIndex]);
- frame_end();
- g_FrameIndex = (g_FrameIndex + 1) % IMGUI_VK_QUEUED_FRAMES;
-#endif // IMGUI_UNLIMITED_FRAME_RATE
// Main loop
while (!glfwWindowShouldClose(window))
