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Examples: Vulkan: Added calls to supports runtime changing back buffer count. (#2071)

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This commit is contained in:
MindSpunk
2018-09-09 16:04:44 +10:00
committed by omar
parent 1c3311e4d6
commit b88a3b2711
4 changed files with 150 additions and 36 deletions
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41
examples/example_glfw_vulkan/main.cpp
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@ -23,6 +23,7 @@
#define IMGUI_VULKAN_DEBUG_REPORT
#endif
static uint32_t g_MinImageCount = 2;
static VkAllocationCallbacks* g_Allocator = NULL;
static VkInstance g_Instance = VK_NULL_HANDLE;
static VkPhysicalDevice g_PhysicalDevice = VK_NULL_HANDLE;
@ -211,8 +212,8 @@ static void SetupVulkanWindowData(ImGui_ImplVulkanH_WindowData* wd, VkSurfaceKHR
//printf("[vulkan] Selected PresentMode = %d\n", wd->PresentMode);
// Create SwapChain, RenderPass, Framebuffer, etc.
ImGui_ImplVulkanH_CreateWindowDataCommandBuffers(g_PhysicalDevice, g_Device, g_QueueFamily, wd, g_Allocator);
ImGui_ImplVulkanH_CreateWindowDataSwapChainAndFramebuffer(g_PhysicalDevice, g_Device, wd, g_Allocator, width, height);
ImGui_ImplVulkanH_CreateWindowDataSwapChainAndFramebuffer(g_PhysicalDevice, g_Device, wd, g_Allocator, width, height, g_MinImageCount);
ImGui_ImplVulkanH_CreateWindowDataCommandBuffers(g_PhysicalDevice, g_Device, g_QueueFamily, wd, g_Allocator);
}
static void CleanupVulkan()
@ -373,6 +374,7 @@ int main(int, char**)
init_info.DescriptorPool = g_DescriptorPool;
init_info.Allocator = g_Allocator;
init_info.CheckVkResultFn = check_vk_result;
init_info.QueuedFrames = wd->BackBufferCount;
ImGui_ImplVulkan_Init(&init_info, wd->RenderPass);
// Load Fonts
@ -433,11 +435,14 @@ int main(int, char**)
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application.
// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
glfwPollEvents();
if (g_ResizeWanted)
{
ImGui_ImplVulkanH_CreateWindowDataSwapChainAndFramebuffer(g_PhysicalDevice, g_Device, &g_WindowData, g_Allocator, g_ResizeWidth, g_ResizeHeight);
g_ResizeWanted = false;
}
if (g_ResizeWanted)
{
ImGui_ImplVulkanH_CreateWindowDataSwapChainAndFramebuffer(g_PhysicalDevice, g_Device, &g_WindowData, g_Allocator, g_ResizeWidth, g_ResizeHeight, g_MinImageCount);
ImGui_ImplVulkanH_CreateWindowDataCommandBuffers(g_PhysicalDevice, g_Device, g_QueueFamily, &g_WindowData, g_Allocator);
ImGui_ImplVulkan_SetQueuedFramesCount(g_WindowData.BackBufferCount);
g_WindowData.FrameIndex = 0;
g_ResizeWanted = false;
}
// Start the Dear ImGui frame
ImGui_ImplVulkan_NewFrame();
@ -478,6 +483,28 @@ int main(int, char**)
ImGui::Text("Hello from another window!");
if (ImGui::Button("Close Me"))
show_another_window = false;
if (ImGui::Button("Increase"))
{
g_MinImageCount++;
g_ResizeWanted = true;
}
ImGui::SameLine();
if (ImGui::Button("Decrease"))
{
if (g_MinImageCount != 2)
{
g_MinImageCount--;
g_ResizeWanted = true;
}
}
ImGui::SameLine();
ImGui::Text("Back Buffers: %i", g_MinImageCount);
ImGui::Text("Frame Index %i", wd->FrameIndex);
ImGui::End();
}