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Examples, Viewport: Vulkan: Experiment (broken) multi-viewport support, merging code from ParticlePeter branches. (#1542, #1042)

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This commit is contained in:
omar
2018-03-12 18:43:25 +01:00
parent f6fc28dfd2
commit b88492746e
6 changed files with 244 additions and 112 deletions
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171
examples/vulkan_example/main.cpp
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@ -224,83 +224,79 @@ static void CleanupVulkan()
vkDestroyInstance(g_Instance, g_Allocator);
}
static void FrameBegin(ImGui_ImplVulkan_WindowData* wd)
static void FrameRender(ImGui_ImplVulkan_WindowData* wd)
{
ImGui_ImplVulkan_FrameData* fd = &wd->Frames[wd->FrameIndex];
VkResult err;
for (;;)
{
err = vkWaitForFences(g_Device, 1, &fd->Fence, VK_TRUE, 100);
if (err == VK_SUCCESS) break;
if (err == VK_TIMEOUT) continue;
check_vk_result(err);
}
{
err = vkAcquireNextImageKHR(g_Device, wd->Swapchain, UINT64_MAX, fd->PresentCompleteSemaphore, VK_NULL_HANDLE, &fd->BackbufferIndex);
check_vk_result(err);
}
{
err = vkResetCommandPool(g_Device, fd->CommandPool, 0);
check_vk_result(err);
VkCommandBufferBeginInfo info = {};
info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
info.flags |= VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT;
err = vkBeginCommandBuffer(fd->CommandBuffer, &info);
check_vk_result(err);
}
{
VkRenderPassBeginInfo info = {};
info.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
info.renderPass = wd->RenderPass;
info.framebuffer = wd->Framebuffer[fd->BackbufferIndex];
info.renderArea.extent.width = wd->Width;
info.renderArea.extent.height = wd->Height;
info.clearValueCount = 1;
info.pClearValues = &wd->ClearValue;
vkCmdBeginRenderPass(fd->CommandBuffer, &info, VK_SUBPASS_CONTENTS_INLINE);
}
}
VkResult err;
static void FrameEnd(ImGui_ImplVulkan_WindowData* wd)
{
ImGui_ImplVulkan_FrameData* fd = &wd->Frames[wd->FrameIndex];
VkResult err;
vkCmdEndRenderPass(fd->CommandBuffer);
{
VkPipelineStageFlags wait_stage = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
VkSubmitInfo info = {};
info.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
info.waitSemaphoreCount = 1;
info.pWaitSemaphores = &fd->PresentCompleteSemaphore;
info.pWaitDstStageMask = &wait_stage;
info.commandBufferCount = 1;
info.pCommandBuffers = &fd->CommandBuffer;
info.signalSemaphoreCount = 1;
info.pSignalSemaphores = &fd->RenderCompleteSemaphore;
VkSemaphore& image_acquired_semaphore = wd->Frames[wd->FrameIndex].ImageAcquiredSemaphore;
err = vkAcquireNextImageKHR(g_Device, wd->Swapchain, UINT64_MAX, image_acquired_semaphore, VK_NULL_HANDLE, &wd->FrameIndex);
check_vk_result(err);
err = vkEndCommandBuffer(fd->CommandBuffer);
check_vk_result(err);
err = vkResetFences(g_Device, 1, &fd->Fence);
check_vk_result(err);
err = vkQueueSubmit(g_Queue, 1, &info, fd->Fence);
check_vk_result(err);
}
ImGui_ImplVulkan_FrameData* fd = &wd->Frames[wd->FrameIndex];
{
err = vkWaitForFences(g_Device, 1, &fd->Fence, VK_TRUE, UINT64_MAX); // wait indefinitely instead of periodically checking
check_vk_result(err);
err = vkResetFences(g_Device, 1, &fd->Fence);
check_vk_result(err);
}
{
err = vkResetCommandPool(g_Device, fd->CommandPool, 0);
check_vk_result(err);
VkCommandBufferBeginInfo info = {};
info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
info.flags |= VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT;
err = vkBeginCommandBuffer(fd->CommandBuffer, &info);
check_vk_result(err);
}
{
VkRenderPassBeginInfo info = {};
info.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
info.renderPass = wd->RenderPass;
info.framebuffer = wd->Framebuffer[wd->FrameIndex];
info.renderArea.extent.width = wd->Width;
info.renderArea.extent.height = wd->Height;
info.clearValueCount = 1;
info.pClearValues = &wd->ClearValue;
vkCmdBeginRenderPass(fd->CommandBuffer, &info, VK_SUBPASS_CONTENTS_INLINE);
}
// Record Imgui Draw Data and draw funcs into command buffer
ImGui_ImplVulkan_RenderDrawData(fd->CommandBuffer, ImGui::GetDrawData());
// Submit command buffer
vkCmdEndRenderPass(fd->CommandBuffer);
{
VkPipelineStageFlags wait_stage = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
VkSubmitInfo info = {};
info.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
info.waitSemaphoreCount = 1;
info.pWaitSemaphores = &image_acquired_semaphore;
info.pWaitDstStageMask = &wait_stage;
info.commandBufferCount = 1;
info.pCommandBuffers = &fd->CommandBuffer;
info.signalSemaphoreCount = 1;
info.pSignalSemaphores = &fd->RenderCompleteSemaphore;
err = vkEndCommandBuffer(fd->CommandBuffer);
check_vk_result(err);
err = vkQueueSubmit(g_Queue, 1, &info, fd->Fence);
check_vk_result(err);
}
}
static void FramePresent(ImGui_ImplVulkan_WindowData* wd)
{
VkResult err;
ImGui_ImplVulkan_FrameData* fd = &wd->Frames[wd->FrameIndex];
VkPresentInfoKHR info = {};
info.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR;
info.waitSemaphoreCount = 1;
info.pWaitSemaphores = &fd->RenderCompleteSemaphore;
info.swapchainCount = 1;
info.pSwapchains = &wd->Swapchain;
info.pImageIndices = &fd->BackbufferIndex;
err = vkQueuePresentKHR(g_Queue, &info);
check_vk_result(err);
VkPresentInfoKHR info = {};
info.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR;
info.waitSemaphoreCount = 1;
info.pWaitSemaphores = &fd->RenderCompleteSemaphore;
info.swapchainCount = 1;
info.pSwapchains = &wd->Swapchain;
info.pImageIndices = &wd->FrameIndex;
VkResult err = vkQueuePresentKHR(g_Queue, &info);
check_vk_result(err);
}
static void glfw_error_callback(int error, const char* description)
@ -312,12 +308,23 @@ static void glfw_resize_callback(GLFWwindow*, int w, int h)
{
g_ResizeWanted = true;
g_ResizeWidth = w;
g_ResizeHeight = h;
g_ResizeHeight = h;
}
static int glfw_create_vk_surface(void* platform_handle, ImU64 vk_instance, const void* vk_allocator, ImU64* out_vk_surface)
{
GLFWwindow* window = (GLFWwindow*)platform_handle;
VkInstance instance = (VkInstance)vk_instance;
const VkAllocationCallbacks* allocator = (const VkAllocationCallbacks*)vk_allocator;
VkSurfaceKHR* surface = (VkSurfaceKHR*)out_vk_surface;
VkResult err = glfwCreateWindowSurface(instance, window, allocator, surface);
check_vk_result(err);
return (int)err;
}
int main(int, char**)
{
// Setup window
// Setup window
glfwSetErrorCallback(glfw_error_callback);
if (!glfwInit())
return 1;
@ -354,6 +361,10 @@ int main(int, char**)
io.ConfigFlags |= ImGuiConfigFlags_PlatformNoTaskBar;
//io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls
// Setup GLFW binding
ImGui_ImplGlfw_InitForVulkan(window, true);
io.PlatformInterface.CreateVkSurface = glfw_create_vk_surface;
// Setup Vulkan binding
ImGui_ImplVulkan_InitInfo init_info = {};
init_info.Instance = g_Instance;
@ -365,7 +376,6 @@ int main(int, char**)
init_info.DescriptorPool = g_DescriptorPool;
init_info.Allocator = g_Allocator;
init_info.CheckVkResultFn = check_vk_result;
ImGui_ImplGlfw_InitForVulkan(window, true);
ImGui_ImplVulkan_Init(&init_info, wd->RenderPass);
// Setup style
@ -430,9 +440,12 @@ int main(int, char**)
// 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_ResizeWanted = false;
}
ImGui_ImplVulkan_NewFrame();
ImGui_ImplGlfw_NewFrame();
@ -443,7 +456,7 @@ int main(int, char**)
static int counter = 0;
ImGui::Text("Hello, world!"); // Display some text (you can use a format string too)
ImGui::SliderFloat("float", &f, 0.0f, 1.0f); // Edit 1 float using a slider from 0.0f to 1.0f
ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color (nb: you could use (float*)&wd->ClearValue instead)
ImGui::Checkbox("Demo Window", &show_demo_window); // Edit bools storing our windows open/close state
ImGui::Checkbox("Another Window", &show_another_window);
@ -476,13 +489,9 @@ int main(int, char**)
// Rendering
ImGui::Render();
memcpy(&wd->ClearValue.color.float32[0], &clear_color, 4 * sizeof(float));
FrameBegin(wd);
ImGui_ImplVulkan_Render(wd->Frames[wd->FrameIndex].CommandBuffer);
FrameEnd(wd);
FrameRender(wd);
ImGui::RenderAdditionalViewports();
FramePresent(wd);
wd->FrameIndex = (wd->FrameIndex + 1) % IMGUI_VK_QUEUED_FRAMES;
}
// Cleanup