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Examples: Vulkan: Only resize swap chain and framebuffer once. (#1042)

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This commit is contained in:
omar 2018-03-12 14:46:24 +01:00
parent 1c18d65313
commit 37cb177745
1 changed files with 19 additions and 5 deletions
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24
examples/vulkan_example/main.cpp
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@ -34,7 +34,9 @@ static VkPresentModeKHR g_PresentMode;
static VkPipelineCache g_PipelineCache = VK_NULL_HANDLE;
static VkDescriptorPool g_DescriptorPool = VK_NULL_HANDLE;
static int fb_width, fb_height;
static int fb_width = 0, fb_height = 0;
static bool g_ResizeWanted = false;
static int g_ResizeWidth = 0, g_ResizeHeight = 0;
static uint32_t g_BackbufferIndices[IMGUI_VK_QUEUED_FRAMES]; // keep track of recently rendered swapchain frame indices
static uint32_t g_BackBufferCount = 0;
static VkImage g_BackBuffer[IMGUI_MAX_POSSIBLE_BACK_BUFFERS] = {};
@ -58,7 +60,7 @@ static void check_vk_result(VkResult err)
abort();
}
static void resize_vulkan(GLFWwindow* /*window*/, int w, int h)
static void resize_vulkan(int w, int h)
{
VkResult err;
VkSwapchainKHR old_swapchain = g_Swapchain;
@ -355,7 +357,7 @@ static void setup_vulkan(GLFWwindow* window)
// Get Present Mode
{
// Requst a certain mode and confirm that it is available. If not use VK_PRESENT_MODE_FIFO_KHR which is mandatory
// Request a certain mode and confirm that it is available. If not use VK_PRESENT_MODE_FIFO_KHR which is mandatory
#ifdef IMGUI_UNLIMITED_FRAME_RATE
g_PresentMode = VK_PRESENT_MODE_IMMEDIATE_KHR;
#else
@ -406,8 +408,7 @@ static void setup_vulkan(GLFWwindow* window)
{
int w, h;
glfwGetFramebufferSize(window, &w, &h);
resize_vulkan(window, w, h);
glfwSetFramebufferSizeCallback(window, resize_vulkan);
resize_vulkan(w, h);
}
// Create Command Buffers
@ -588,6 +589,13 @@ static void glfw_error_callback(int error, const char* description)
fprintf(stderr, "Error %d: %s\n", error, description);
}
static void glfw_resize_callback(GLFWwindow*, int w, int h)
{
g_ResizeWanted = true;
g_ResizeWidth = w;
g_ResizeHeight = h;
}
int main(int, char**)
{
// Setup window
@ -605,6 +613,7 @@ int main(int, char**)
return 1;
}
setup_vulkan(window);
glfwSetFramebufferSizeCallback(window, glfw_resize_callback);
// Setup ImGui binding
ImGui::CreateContext();
@ -680,6 +689,11 @@ 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)
resize_vulkan(g_ResizeWidth, g_ResizeHeight);
g_ResizeWanted = false;
ImGui_ImplGlfwVulkan_NewFrame();
// 1. Show a simple window.