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Examples: Vulkan: Moved variables into per-window data, refactored/tweaks to that the bug functions main.cpp for both SDL and GLFW examples match (they'll probably be moved to imgui_impl_vulkan as helpers).

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This commit is contained in:
omar 2018-03-02 21:21:52 +01:00
parent e0f283cfcb
commit 7113fc7dee
2 changed files with 303 additions and 229 deletions
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263
examples/sdl_vulkan_example/main.cpp
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@ -18,27 +18,14 @@
static VkAllocationCallbacks* g_Allocator = NULL; static VkAllocationCallbacks* g_Allocator = NULL;
static VkInstance g_Instance = VK_NULL_HANDLE; static VkInstance g_Instance = VK_NULL_HANDLE;
static VkSurfaceKHR g_Surface = VK_NULL_HANDLE;
static VkPhysicalDevice g_PhysicalDevice = VK_NULL_HANDLE; static VkPhysicalDevice g_PhysicalDevice = VK_NULL_HANDLE;
static VkDevice g_Device = VK_NULL_HANDLE; static VkDevice g_Device = VK_NULL_HANDLE;
static VkSwapchainKHR g_Swapchain = VK_NULL_HANDLE;
static VkRenderPass g_RenderPass = VK_NULL_HANDLE;
static uint32_t g_QueueFamily = (uint32_t)-1; static uint32_t g_QueueFamily = (uint32_t)-1;
static VkQueue g_Queue = VK_NULL_HANDLE; static VkQueue g_Queue = VK_NULL_HANDLE;
static VkDebugReportCallbackEXT g_DebugReport = VK_NULL_HANDLE; static VkDebugReportCallbackEXT g_DebugReport = VK_NULL_HANDLE;
static VkSurfaceFormatKHR g_SurfaceFormat;
static VkPresentModeKHR g_PresentMode;
static VkPipelineCache g_PipelineCache = VK_NULL_HANDLE; static VkPipelineCache g_PipelineCache = VK_NULL_HANDLE;
static VkDescriptorPool g_DescriptorPool = VK_NULL_HANDLE; static VkDescriptorPool g_DescriptorPool = VK_NULL_HANDLE;
static int fb_width, fb_height;
static uint32_t g_BackBufferCount = 0;
static VkImage g_BackBuffer[IMGUI_MAX_POSSIBLE_BACK_BUFFERS] = {};
static VkImageView g_BackBufferView[IMGUI_MAX_POSSIBLE_BACK_BUFFERS] = {};
static VkFramebuffer g_Framebuffer[IMGUI_MAX_POSSIBLE_BACK_BUFFERS] = {};
struct FrameData struct FrameData
{ {
uint32_t BackbufferIndex; // keep track of recently rendered swapchain frame indices uint32_t BackbufferIndex; // keep track of recently rendered swapchain frame indices
@ -47,11 +34,51 @@ struct FrameData
VkFence Fence; VkFence Fence;
VkSemaphore PresentCompleteSemaphore; VkSemaphore PresentCompleteSemaphore;
VkSemaphore RenderCompleteSemaphore; VkSemaphore RenderCompleteSemaphore;
};
static uint32_t g_FrameIndex = 0;
static FrameData g_Frames[IMGUI_VK_QUEUED_FRAMES] = {};
static VkClearValue g_ClearValue = {}; FrameData()
{
BackbufferIndex = 0;
CommandPool = VK_NULL_HANDLE;
CommandBuffer = VK_NULL_HANDLE;
Fence = VK_NULL_HANDLE;
PresentCompleteSemaphore = VK_NULL_HANDLE;
RenderCompleteSemaphore = VK_NULL_HANDLE;
}
};
struct WindowData
{
int Width, Height;
VkSwapchainKHR Swapchain;
VkSurfaceKHR Surface;
VkSurfaceFormatKHR SurfaceFormat;
VkPresentModeKHR PresentMode;
VkRenderPass RenderPass;
VkClearValue ClearValue;
uint32_t BackBufferCount;
VkImage BackBuffer[IMGUI_MAX_POSSIBLE_BACK_BUFFERS];
VkImageView BackBufferView[IMGUI_MAX_POSSIBLE_BACK_BUFFERS];
VkFramebuffer Framebuffer[IMGUI_MAX_POSSIBLE_BACK_BUFFERS];
uint32_t FrameIndex;
FrameData Frames[IMGUI_VK_QUEUED_FRAMES];
WindowData()
{
Width = Height = 0;
Swapchain = VK_NULL_HANDLE;
Surface = VK_NULL_HANDLE;
memset(&SurfaceFormat, 0, sizeof(SurfaceFormat));
PresentMode = VK_PRESENT_MODE_MAX_ENUM_KHR;
RenderPass = VK_NULL_HANDLE;
memset(&ClearValue, 0, sizeof(ClearValue));
BackBufferCount = 0;
memset(&BackBuffer, 0, sizeof(BackBuffer));
memset(&BackBufferView, 0, sizeof(BackBufferView));
memset(&Framebuffer, 0, sizeof(Framebuffer));
FrameIndex = 0;
}
};
static WindowData g_WindowData;
static void check_vk_result(VkResult err) static void check_vk_result(VkResult err)
{ {
@ -61,41 +88,42 @@ static void check_vk_result(VkResult err)
abort(); abort();
} }
static void CreateOrResizeSwapChainAndFrameBuffer(int w, int h) static void CreateOrResizeSwapChainAndFrameBuffer(WindowData* wd, int w, int h)
{ {
VkResult err; VkResult err;
VkSwapchainKHR old_swapchain = g_Swapchain; VkSwapchainKHR old_swapchain = wd->Swapchain;
err = vkDeviceWaitIdle(g_Device); err = vkDeviceWaitIdle(g_Device);
check_vk_result(err); check_vk_result(err);
// Destroy old Framebuffer // Destroy old Framebuffer
for (uint32_t i = 0; i < g_BackBufferCount; i++) for (uint32_t i = 0; i < wd->BackBufferCount; i++)
{ {
if (g_BackBufferView[i]) if (wd->BackBufferView[i])
vkDestroyImageView(g_Device, g_BackBufferView[i], g_Allocator); vkDestroyImageView(g_Device, wd->BackBufferView[i], g_Allocator);
if (g_Framebuffer[i]) if (wd->Framebuffer[i])
vkDestroyFramebuffer(g_Device, g_Framebuffer[i], g_Allocator); vkDestroyFramebuffer(g_Device, wd->Framebuffer[i], g_Allocator);
} }
if (g_RenderPass) wd->BackBufferCount = 0;
vkDestroyRenderPass(g_Device, g_RenderPass, g_Allocator); if (wd->RenderPass)
vkDestroyRenderPass(g_Device, wd->RenderPass, g_Allocator);
// Create Swapchain // Create Swapchain
{ {
VkSwapchainCreateInfoKHR info = {}; VkSwapchainCreateInfoKHR info = {};
info.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR; info.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR;
info.surface = g_Surface; info.surface = wd->Surface;
info.imageFormat = g_SurfaceFormat.format; info.imageFormat = wd->SurfaceFormat.format;
info.imageColorSpace = g_SurfaceFormat.colorSpace; info.imageColorSpace = wd->SurfaceFormat.colorSpace;
info.imageArrayLayers = 1; info.imageArrayLayers = 1;
info.imageUsage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT; info.imageUsage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
info.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE; // Assume that graphics family == present family info.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE; // Assume that graphics family == present family
info.preTransform = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR; info.preTransform = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR;
info.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR; info.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
info.presentMode = g_PresentMode; info.presentMode = wd->PresentMode;
info.clipped = VK_TRUE; info.clipped = VK_TRUE;
info.oldSwapchain = old_swapchain; info.oldSwapchain = old_swapchain;
VkSurfaceCapabilitiesKHR cap; VkSurfaceCapabilitiesKHR cap;
err = vkGetPhysicalDeviceSurfaceCapabilitiesKHR(g_PhysicalDevice, g_Surface, &cap); err = vkGetPhysicalDeviceSurfaceCapabilitiesKHR(g_PhysicalDevice, wd->Surface, &cap);
check_vk_result(err); check_vk_result(err);
if (cap.maxImageCount > 0) if (cap.maxImageCount > 0)
info.minImageCount = (cap.minImageCount + 2 < cap.maxImageCount) ? (cap.minImageCount + 2) : cap.maxImageCount; info.minImageCount = (cap.minImageCount + 2 < cap.maxImageCount) ? (cap.minImageCount + 2) : cap.maxImageCount;
@ -104,19 +132,19 @@ static void CreateOrResizeSwapChainAndFrameBuffer(int w, int h)
if (cap.currentExtent.width == 0xffffffff) if (cap.currentExtent.width == 0xffffffff)
{ {
info.imageExtent.width = fb_width = w; info.imageExtent.width = wd->Width = w;
info.imageExtent.height = fb_height = h; info.imageExtent.height = wd->Height = h;
} }
else else
{ {
info.imageExtent.width = fb_width = cap.currentExtent.width; info.imageExtent.width = wd->Width = cap.currentExtent.width;
info.imageExtent.height = fb_height = cap.currentExtent.height; info.imageExtent.height = wd->Height = cap.currentExtent.height;
} }
err = vkCreateSwapchainKHR(g_Device, &info, g_Allocator, &g_Swapchain); err = vkCreateSwapchainKHR(g_Device, &info, g_Allocator, &wd->Swapchain);
check_vk_result(err); check_vk_result(err);
err = vkGetSwapchainImagesKHR(g_Device, g_Swapchain, &g_BackBufferCount, NULL); err = vkGetSwapchainImagesKHR(g_Device, wd->Swapchain, &wd->BackBufferCount, NULL);
check_vk_result(err); check_vk_result(err);
err = vkGetSwapchainImagesKHR(g_Device, g_Swapchain, &g_BackBufferCount, g_BackBuffer); err = vkGetSwapchainImagesKHR(g_Device, wd->Swapchain, &wd->BackBufferCount, wd->BackBuffer);
check_vk_result(err); check_vk_result(err);
} }
if (old_swapchain) if (old_swapchain)
@ -125,7 +153,7 @@ static void CreateOrResizeSwapChainAndFrameBuffer(int w, int h)
// Create the Render Pass // Create the Render Pass
{ {
VkAttachmentDescription attachment = {}; VkAttachmentDescription attachment = {};
attachment.format = g_SurfaceFormat.format; attachment.format = wd->SurfaceFormat.format;
attachment.samples = VK_SAMPLE_COUNT_1_BIT; attachment.samples = VK_SAMPLE_COUNT_1_BIT;
attachment.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR; attachment.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
attachment.storeOp = VK_ATTACHMENT_STORE_OP_STORE; attachment.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
@ -146,7 +174,7 @@ static void CreateOrResizeSwapChainAndFrameBuffer(int w, int h)
info.pAttachments = &attachment; info.pAttachments = &attachment;
info.subpassCount = 1; info.subpassCount = 1;
info.pSubpasses = &subpass; info.pSubpasses = &subpass;
err = vkCreateRenderPass(g_Device, &info, g_Allocator, &g_RenderPass); err = vkCreateRenderPass(g_Device, &info, g_Allocator, &wd->RenderPass);
check_vk_result(err); check_vk_result(err);
} }
@ -155,17 +183,17 @@ static void CreateOrResizeSwapChainAndFrameBuffer(int w, int h)
VkImageViewCreateInfo info = {}; VkImageViewCreateInfo info = {};
info.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO; info.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
info.viewType = VK_IMAGE_VIEW_TYPE_2D; info.viewType = VK_IMAGE_VIEW_TYPE_2D;
info.format = g_SurfaceFormat.format; info.format = wd->SurfaceFormat.format;
info.components.r = VK_COMPONENT_SWIZZLE_R; info.components.r = VK_COMPONENT_SWIZZLE_R;
info.components.g = VK_COMPONENT_SWIZZLE_G; info.components.g = VK_COMPONENT_SWIZZLE_G;
info.components.b = VK_COMPONENT_SWIZZLE_B; info.components.b = VK_COMPONENT_SWIZZLE_B;
info.components.a = VK_COMPONENT_SWIZZLE_A; info.components.a = VK_COMPONENT_SWIZZLE_A;
VkImageSubresourceRange image_range = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1 }; VkImageSubresourceRange image_range = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1 };
info.subresourceRange = image_range; info.subresourceRange = image_range;
for (uint32_t i = 0; i < g_BackBufferCount; i++) for (uint32_t i = 0; i < wd->BackBufferCount; i++)
{ {
info.image = g_BackBuffer[i]; info.image = wd->BackBuffer[i];
err = vkCreateImageView(g_Device, &info, g_Allocator, &g_BackBufferView[i]); err = vkCreateImageView(g_Device, &info, g_Allocator, &wd->BackBufferView[i]);
check_vk_result(err); check_vk_result(err);
} }
} }
@ -175,16 +203,16 @@ static void CreateOrResizeSwapChainAndFrameBuffer(int w, int h)
VkImageView attachment[1]; VkImageView attachment[1];
VkFramebufferCreateInfo info = {}; VkFramebufferCreateInfo info = {};
info.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO; info.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO;
info.renderPass = g_RenderPass; info.renderPass = wd->RenderPass;
info.attachmentCount = 1; info.attachmentCount = 1;
info.pAttachments = attachment; info.pAttachments = attachment;
info.width = fb_width; info.width = wd->Width;
info.height = fb_height; info.height = wd->Height;
info.layers = 1; info.layers = 1;
for (uint32_t i = 0; i < g_BackBufferCount; i++) for (uint32_t i = 0; i < wd->BackBufferCount; i++)
{ {
attachment[0] = g_BackBufferView[i]; attachment[0] = wd->BackBufferView[i];
err = vkCreateFramebuffer(g_Device, &info, g_Allocator, &g_Framebuffer[i]); err = vkCreateFramebuffer(g_Device, &info, g_Allocator, &wd->Framebuffer[i]);
check_vk_result(err); check_vk_result(err);
} }
} }
@ -199,7 +227,7 @@ static VKAPI_ATTR VkBool32 VKAPI_CALL debug_report(VkDebugReportFlagsEXT flags,
} }
#endif // IMGUI_VULKAN_DEBUG_REPORT #endif // IMGUI_VULKAN_DEBUG_REPORT
static void setup_vulkan(SDL_Window* window, const char** extensions, uint32_t extensions_count) static void CreateVulkanInstance(const char** extensions, uint32_t extensions_count)
{ {
VkResult err; VkResult err;
@ -244,16 +272,11 @@ static void setup_vulkan(SDL_Window* window, const char** extensions, uint32_t e
check_vk_result(err); check_vk_result(err);
#endif // IMGUI_VULKAN_DEBUG_REPORT #endif // IMGUI_VULKAN_DEBUG_REPORT
} }
}
// Create Window Surface (with SDL) static void SetupVulkan(WindowData* wd)
{ {
SDL_bool result = SDL_Vulkan_CreateSurface(window, g_Instance, &g_Surface); VkResult err;
if (result == 0)
{
printf("failed to create Vulkan surface\n");
abort();
}
}
// Select GPU // Select GPU
{ {
@ -291,7 +314,7 @@ static void setup_vulkan(SDL_Window* window, const char** extensions, uint32_t e
// Check for WSI support // Check for WSI support
{ {
VkBool32 res; VkBool32 res;
vkGetPhysicalDeviceSurfaceSupportKHR(g_PhysicalDevice, g_QueueFamily, g_Surface, &res); vkGetPhysicalDeviceSurfaceSupportKHR(g_PhysicalDevice, g_QueueFamily, wd->Surface, &res);
if (res != VK_TRUE) if (res != VK_TRUE)
{ {
fprintf(stderr, "Error no WSI support on physical device 0\n"); fprintf(stderr, "Error no WSI support on physical device 0\n");
@ -304,7 +327,7 @@ static void setup_vulkan(SDL_Window* window, const char** extensions, uint32_t e
{ {
const VkFormat requestSurfaceImageFormat[] = { VK_FORMAT_B8G8R8A8_UNORM, VK_FORMAT_R8G8B8A8_UNORM, VK_FORMAT_B8G8R8_UNORM, VK_FORMAT_R8G8B8_UNORM }; const VkFormat requestSurfaceImageFormat[] = { VK_FORMAT_B8G8R8A8_UNORM, VK_FORMAT_R8G8B8A8_UNORM, VK_FORMAT_B8G8R8_UNORM, VK_FORMAT_R8G8B8_UNORM };
const VkColorSpaceKHR requestSurfaceColorSpace = VK_COLORSPACE_SRGB_NONLINEAR_KHR; const VkColorSpaceKHR requestSurfaceColorSpace = VK_COLORSPACE_SRGB_NONLINEAR_KHR;
g_SurfaceFormat = ImGui_ImplVulkan_SelectSurfaceFormat(g_PhysicalDevice, g_Surface, requestSurfaceImageFormat, (size_t)IM_ARRAYSIZE(requestSurfaceImageFormat), requestSurfaceColorSpace); wd->SurfaceFormat = ImGui_ImplVulkan_SelectSurfaceFormat(g_PhysicalDevice, wd->Surface, requestSurfaceImageFormat, (size_t)IM_ARRAYSIZE(requestSurfaceImageFormat), requestSurfaceColorSpace);
} }
@ -315,7 +338,7 @@ static void setup_vulkan(SDL_Window* window, const char** extensions, uint32_t e
#else #else
VkPresentModeKHR present_mode = VK_PRESENT_MODE_FIFO_KHR; VkPresentModeKHR present_mode = VK_PRESENT_MODE_FIFO_KHR;
#endif #endif
g_PresentMode = ImGui_ImplVulkan_SelectPresentMode(g_PhysicalDevice, g_Surface, &present_mode, 1); wd->PresentMode = ImGui_ImplVulkan_SelectPresentMode(g_PhysicalDevice, wd->Surface, &present_mode, 1);
} }
@ -340,19 +363,10 @@ static void setup_vulkan(SDL_Window* window, const char** extensions, uint32_t e
vkGetDeviceQueue(g_Device, g_QueueFamily, 0, &g_Queue); vkGetDeviceQueue(g_Device, g_QueueFamily, 0, &g_Queue);
} }
// Create Framebuffers
{
int w, h;
SDL_GetWindowSize(window, &w, &h);
CreateOrResizeSwapChainAndFrameBuffer(w, h);
}
// Create Command Buffers // Create Command Buffers
for (int i = 0; i < IMGUI_VK_QUEUED_FRAMES; i++) for (int i = 0; i < IMGUI_VK_QUEUED_FRAMES; i++)
{ {
FrameData* fd = &g_Frames[i]; FrameData* fd = &wd->Frames[i];
{ {
VkCommandPoolCreateInfo info = {}; VkCommandPoolCreateInfo info = {};
info.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO; info.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO;
@ -416,24 +430,25 @@ static void setup_vulkan(SDL_Window* window, const char** extensions, uint32_t e
static void cleanup_vulkan() static void cleanup_vulkan()
{ {
WindowData* wd = &g_WindowData;
vkDestroyDescriptorPool(g_Device, g_DescriptorPool, g_Allocator); vkDestroyDescriptorPool(g_Device, g_DescriptorPool, g_Allocator);
for (int i = 0; i < IMGUI_VK_QUEUED_FRAMES; i++) for (int i = 0; i < IMGUI_VK_QUEUED_FRAMES; i++)
{ {
FrameData* fd = &g_Frames[i]; FrameData* fd = &wd->Frames[i];
vkDestroyFence(g_Device, fd->Fence, g_Allocator); vkDestroyFence(g_Device, fd->Fence, g_Allocator);
vkFreeCommandBuffers(g_Device, fd->CommandPool, 1, &fd->CommandBuffer); vkFreeCommandBuffers(g_Device, fd->CommandPool, 1, &fd->CommandBuffer);
vkDestroyCommandPool(g_Device, fd->CommandPool, g_Allocator); vkDestroyCommandPool(g_Device, fd->CommandPool, g_Allocator);
vkDestroySemaphore(g_Device, fd->PresentCompleteSemaphore, g_Allocator); vkDestroySemaphore(g_Device, fd->PresentCompleteSemaphore, g_Allocator);
vkDestroySemaphore(g_Device, fd->RenderCompleteSemaphore, g_Allocator); vkDestroySemaphore(g_Device, fd->RenderCompleteSemaphore, g_Allocator);
} }
for (uint32_t i = 0; i < g_BackBufferCount; i++) for (uint32_t i = 0; i < wd->BackBufferCount; i++)
{ {
vkDestroyImageView(g_Device, g_BackBufferView[i], g_Allocator); vkDestroyImageView(g_Device, wd->BackBufferView[i], g_Allocator);
vkDestroyFramebuffer(g_Device, g_Framebuffer[i], g_Allocator); vkDestroyFramebuffer(g_Device, wd->Framebuffer[i], g_Allocator);
} }
vkDestroyRenderPass(g_Device, g_RenderPass, g_Allocator); vkDestroyRenderPass(g_Device, wd->RenderPass, g_Allocator);
vkDestroySwapchainKHR(g_Device, g_Swapchain, g_Allocator); vkDestroySwapchainKHR(g_Device, wd->Swapchain, g_Allocator);
vkDestroySurfaceKHR(g_Instance, g_Surface, g_Allocator); vkDestroySurfaceKHR(g_Instance, wd->Surface, g_Allocator);
#ifdef IMGUI_VULKAN_DEBUG_REPORT #ifdef IMGUI_VULKAN_DEBUG_REPORT
// Remove the debug report callback // Remove the debug report callback
@ -445,9 +460,9 @@ static void cleanup_vulkan()
vkDestroyInstance(g_Instance, g_Allocator); vkDestroyInstance(g_Instance, g_Allocator);
} }
static void frame_begin() static void frame_begin(WindowData* wd)
{ {
FrameData* fd = &g_Frames[g_FrameIndex]; FrameData* fd = &wd->Frames[wd->FrameIndex];
VkResult err; VkResult err;
for (;;) for (;;)
{ {
@ -457,7 +472,7 @@ static void frame_begin()
check_vk_result(err); check_vk_result(err);
} }
{ {
err = vkAcquireNextImageKHR(g_Device, g_Swapchain, UINT64_MAX, fd->PresentCompleteSemaphore, VK_NULL_HANDLE, &fd->BackbufferIndex); err = vkAcquireNextImageKHR(g_Device, wd->Swapchain, UINT64_MAX, fd->PresentCompleteSemaphore, VK_NULL_HANDLE, &fd->BackbufferIndex);
check_vk_result(err); check_vk_result(err);
} }
{ {
@ -472,19 +487,19 @@ static void frame_begin()
{ {
VkRenderPassBeginInfo info = {}; VkRenderPassBeginInfo info = {};
info.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO; info.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
info.renderPass = g_RenderPass; info.renderPass = wd->RenderPass;
info.framebuffer = g_Framebuffer[fd->BackbufferIndex]; info.framebuffer = wd->Framebuffer[fd->BackbufferIndex];
info.renderArea.extent.width = fb_width; info.renderArea.extent.width = wd->Width;
info.renderArea.extent.height = fb_height; info.renderArea.extent.height = wd->Height;
info.clearValueCount = 1; info.clearValueCount = 1;
info.pClearValues = &g_ClearValue; info.pClearValues = &wd->ClearValue;
vkCmdBeginRenderPass(fd->CommandBuffer, &info, VK_SUBPASS_CONTENTS_INLINE); vkCmdBeginRenderPass(fd->CommandBuffer, &info, VK_SUBPASS_CONTENTS_INLINE);
} }
} }
static void frame_end() static void frame_end(WindowData* wd)
{ {
FrameData* fd = &g_Frames[g_FrameIndex]; FrameData* fd = &wd->Frames[wd->FrameIndex];
VkResult err; VkResult err;
vkCmdEndRenderPass(fd->CommandBuffer); vkCmdEndRenderPass(fd->CommandBuffer);
{ {
@ -508,23 +523,23 @@ static void frame_end()
} }
} }
static void frame_present() static void frame_present(WindowData* wd)
{ {
VkResult err; VkResult err;
// If IMGUI_UNLIMITED_FRAME_RATE is defined we present the latest but one frame. Otherwise we present the latest rendered frame // 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 #ifdef IMGUI_UNLIMITED_FRAME_RATE
uint32_t PresentIndex = (g_FrameIndex + IMGUI_VK_QUEUED_FRAMES - 1) % IMGUI_VK_QUEUED_FRAMES; uint32_t PresentIndex = (wd->FrameIndex + IMGUI_VK_QUEUED_FRAMES - 1) % IMGUI_VK_QUEUED_FRAMES;
#else #else
uint32_t PresentIndex = g_FrameIndex; uint32_t PresentIndex = g_FrameIndex;
#endif // IMGUI_UNLIMITED_FRAME_RATE #endif // IMGUI_UNLIMITED_FRAME_RATE
FrameData* fd = &g_Frames[PresentIndex]; FrameData* fd = &wd->Frames[PresentIndex];
VkPresentInfoKHR info = {}; VkPresentInfoKHR info = {};
info.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR; info.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR;
info.waitSemaphoreCount = 1; info.waitSemaphoreCount = 1;
info.pWaitSemaphores = &fd->RenderCompleteSemaphore; info.pWaitSemaphores = &fd->RenderCompleteSemaphore;
info.swapchainCount = 1; info.swapchainCount = 1;
info.pSwapchains = &g_Swapchain; info.pSwapchains = &wd->Swapchain;
info.pImageIndices = &fd->BackbufferIndex; info.pImageIndices = &fd->BackbufferIndex;
err = vkQueuePresentKHR(g_Queue, &info); err = vkQueuePresentKHR(g_Queue, &info);
check_vk_result(err); check_vk_result(err);
@ -545,13 +560,31 @@ int main(int, char**)
SDL_Window* window = SDL_CreateWindow("ImGui SDL2+Vulkan example", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 1280, 720, SDL_WINDOW_VULKAN|SDL_WINDOW_RESIZABLE); SDL_Window* window = SDL_CreateWindow("ImGui SDL2+Vulkan example", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 1280, 720, SDL_WINDOW_VULKAN|SDL_WINDOW_RESIZABLE);
// Setup Vulkan // Setup Vulkan
uint32_t extensions_count; uint32_t sdl_extensions_count;
SDL_Vulkan_GetInstanceExtensions(window, &extensions_count, NULL); SDL_Vulkan_GetInstanceExtensions(window, &sdl_extensions_count, NULL);
const char** sdl_extensions = new const char*[extensions_count]; const char** sdl_extensions = new const char*[sdl_extensions_count];
SDL_Vulkan_GetInstanceExtensions(window, &extensions_count, sdl_extensions); SDL_Vulkan_GetInstanceExtensions(window, &sdl_extensions_count, sdl_extensions);
setup_vulkan(window, sdl_extensions, extensions_count); CreateVulkanInstance(sdl_extensions, sdl_extensions_count);
delete[] sdl_extensions; delete[] sdl_extensions;
// Create Window Surface
WindowData* wd = &g_WindowData;
SDL_bool result = SDL_Vulkan_CreateSurface(window, g_Instance, &wd->Surface);
if (result == 0)
{
printf("Failed to create Vulkan surface.\n");
return 1;
}
SetupVulkan(wd);
// Create Framebuffers
{
int w, h;
SDL_GetWindowSize(window, &w, &h);
CreateOrResizeSwapChainAndFrameBuffer(wd, w, h);
}
// Setup ImGui binding // Setup ImGui binding
ImGui::CreateContext(); ImGui::CreateContext();
@ -559,13 +592,15 @@ int main(int, char**)
init_info.Allocator = g_Allocator; init_info.Allocator = g_Allocator;
init_info.PhysicalDevice = g_PhysicalDevice; init_info.PhysicalDevice = g_PhysicalDevice;
init_info.Device = g_Device; init_info.Device = g_Device;
init_info.RenderPass = g_RenderPass; init_info.RenderPass = wd->RenderPass;
init_info.PipelineCache = g_PipelineCache; init_info.PipelineCache = g_PipelineCache;
init_info.DescriptorPool = g_DescriptorPool; init_info.DescriptorPool = g_DescriptorPool;
init_info.CheckVkResultFn = check_vk_result; init_info.CheckVkResultFn = check_vk_result;
ImGuiIO& io = ImGui::GetIO(); (void)io; ImGuiIO& io = ImGui::GetIO(); (void)io;
//io.ConfigFlags |= ImGuiConfigFlags_MultiViewports;
//io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls //io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls
ImGui_ImplVulkan_Init(&init_info); ImGui_ImplVulkan_Init(&init_info);
ImGui_ImplSDL2_Init(window, NULL); ImGui_ImplSDL2_Init(window, NULL);
@ -591,8 +626,8 @@ int main(int, char**)
// Upload Fonts // Upload Fonts
{ {
// Use any command queue // Use any command queue
VkCommandPool command_pool = g_Frames[g_FrameIndex].CommandPool; VkCommandPool command_pool = wd->Frames[wd->FrameIndex].CommandPool;
VkCommandBuffer command_buffer = g_Frames[g_FrameIndex].CommandBuffer; VkCommandBuffer command_buffer = wd->Frames[wd->FrameIndex].CommandBuffer;
VkResult err; VkResult err;
err = vkResetCommandPool(g_Device, command_pool, 0); err = vkResetCommandPool(g_Device, command_pool, 0);
@ -640,7 +675,7 @@ int main(int, char**)
if (event.type == SDL_QUIT) if (event.type == SDL_QUIT)
done = true; done = true;
if (event.type == SDL_WINDOWEVENT && event.window.event == SDL_WINDOWEVENT_RESIZED && event.window.windowID == SDL_GetWindowID(window)) if (event.type == SDL_WINDOWEVENT && event.window.event == SDL_WINDOWEVENT_RESIZED && event.window.windowID == SDL_GetWindowID(window))
CreateOrResizeSwapChainAndFrameBuffer((int)event.window.data1, (int)event.window.data2); CreateOrResizeSwapChainAndFrameBuffer(wd, (int)event.window.data1, (int)event.window.data2);
} }
ImGui_ImplVulkan_NewFrame(); ImGui_ImplVulkan_NewFrame();
ImGui_ImplSDL2_NewFrame(window); ImGui_ImplSDL2_NewFrame(window);
@ -683,21 +718,25 @@ int main(int, char**)
} }
// Rendering // Rendering
memcpy(&g_ClearValue.color.float32[0], &clear_color, 4 * sizeof(float)); memcpy(&wd->ClearValue.color.float32[0], &clear_color, 4 * sizeof(float));
frame_begin(); frame_begin(wd);
ImGui_ImplVulkan_Render(g_Frames[g_FrameIndex].CommandBuffer); ImGui_ImplVulkan_Render(wd->Frames[wd->FrameIndex].CommandBuffer);
frame_end(); frame_end(wd);
// 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.
#ifdef IMGUI_UNLIMITED_FRAME_RATE #ifdef IMGUI_UNLIMITED_FRAME_RATE
// 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 FrameIndex without presenting.
if (swap_chain_has_at_least_one_image) if (swap_chain_has_at_least_one_image)
frame_present(); frame_present(wd);
#else #else
frame_present(); frame_present(wd);
#endif #endif
swap_chain_has_at_least_one_image = true; swap_chain_has_at_least_one_image = true;
g_FrameIndex = (g_FrameIndex + 1) % IMGUI_VK_QUEUED_FRAMES; wd->FrameIndex = (wd->FrameIndex + 1) % IMGUI_VK_QUEUED_FRAMES;
// FIXME-PLATFORM
ImGui::UpdatePlatformWindows();
ImGui::RenderPlatformWindows();
} }
// Cleanup // Cleanup

269
examples/vulkan_example/main.cpp
View File

@ -21,40 +21,67 @@
static VkAllocationCallbacks* g_Allocator = NULL; static VkAllocationCallbacks* g_Allocator = NULL;
static VkInstance g_Instance = VK_NULL_HANDLE; static VkInstance g_Instance = VK_NULL_HANDLE;
static VkSurfaceKHR g_Surface = VK_NULL_HANDLE;
static VkPhysicalDevice g_PhysicalDevice = VK_NULL_HANDLE; static VkPhysicalDevice g_PhysicalDevice = VK_NULL_HANDLE;
static VkDevice g_Device = VK_NULL_HANDLE; static VkDevice g_Device = VK_NULL_HANDLE;
static VkSwapchainKHR g_Swapchain = VK_NULL_HANDLE;
static VkRenderPass g_RenderPass = VK_NULL_HANDLE;
static uint32_t g_QueueFamily = (uint32_t)-1; static uint32_t g_QueueFamily = (uint32_t)-1;
static VkQueue g_Queue = VK_NULL_HANDLE; static VkQueue g_Queue = VK_NULL_HANDLE;
static VkDebugReportCallbackEXT g_DebugReport = VK_NULL_HANDLE; static VkDebugReportCallbackEXT g_DebugReport = VK_NULL_HANDLE;
static VkSurfaceFormatKHR g_SurfaceFormat;
static VkPresentModeKHR g_PresentMode;
static VkPipelineCache g_PipelineCache = VK_NULL_HANDLE; static VkPipelineCache g_PipelineCache = VK_NULL_HANDLE;
static VkDescriptorPool g_DescriptorPool = VK_NULL_HANDLE; static VkDescriptorPool g_DescriptorPool = VK_NULL_HANDLE;
static int fb_width, fb_height;
static uint32_t g_BackBufferCount = 0;
static VkImage g_BackBuffer[IMGUI_MAX_POSSIBLE_BACK_BUFFERS] = {};
static VkImageView g_BackBufferView[IMGUI_MAX_POSSIBLE_BACK_BUFFERS] = {};
static VkFramebuffer g_Framebuffer[IMGUI_MAX_POSSIBLE_BACK_BUFFERS] = {};
struct FrameData struct FrameData
{ {
uint32_t BackbufferIndex; // keep track of recently rendered swapchain frame indices uint32_t BackbufferIndex; // keep track of recently rendered swapchain frame indices
VkCommandPool CommandPool; VkCommandPool CommandPool;
VkCommandBuffer CommandBuffer; VkCommandBuffer CommandBuffer;
VkFence Fence; VkFence Fence;
VkSemaphore PresentCompleteSemaphore; VkSemaphore PresentCompleteSemaphore;
VkSemaphore RenderCompleteSemaphore; VkSemaphore RenderCompleteSemaphore;
};
static uint32_t g_FrameIndex = 0;
static FrameData g_Frames[IMGUI_VK_QUEUED_FRAMES] = {};
static VkClearValue g_ClearValue = {}; FrameData()
{
BackbufferIndex = 0;
CommandPool = VK_NULL_HANDLE;
CommandBuffer = VK_NULL_HANDLE;
Fence = VK_NULL_HANDLE;
PresentCompleteSemaphore = VK_NULL_HANDLE;
RenderCompleteSemaphore = VK_NULL_HANDLE;
}
};
struct WindowData
{
int Width, Height;
VkSwapchainKHR Swapchain;
VkSurfaceKHR Surface;
VkSurfaceFormatKHR SurfaceFormat;
VkPresentModeKHR PresentMode;
VkRenderPass RenderPass;
VkClearValue ClearValue;
uint32_t BackBufferCount;
VkImage BackBuffer[IMGUI_MAX_POSSIBLE_BACK_BUFFERS];
VkImageView BackBufferView[IMGUI_MAX_POSSIBLE_BACK_BUFFERS];
VkFramebuffer Framebuffer[IMGUI_MAX_POSSIBLE_BACK_BUFFERS];
uint32_t FrameIndex;
FrameData Frames[IMGUI_VK_QUEUED_FRAMES];
WindowData()
{
Width = Height = 0;
Swapchain = VK_NULL_HANDLE;
Surface = VK_NULL_HANDLE;
memset(&SurfaceFormat, 0, sizeof(SurfaceFormat));
PresentMode = VK_PRESENT_MODE_MAX_ENUM_KHR;
RenderPass = VK_NULL_HANDLE;
memset(&ClearValue, 0, sizeof(ClearValue));
BackBufferCount = 0;
memset(&BackBuffer, 0, sizeof(BackBuffer));
memset(&BackBufferView, 0, sizeof(BackBufferView));
memset(&Framebuffer, 0, sizeof(Framebuffer));
FrameIndex = 0;
}
};
static WindowData g_WindowData;
static void check_vk_result(VkResult err) static void check_vk_result(VkResult err)
{ {
@ -64,41 +91,42 @@ static void check_vk_result(VkResult err)
abort(); abort();
} }
static void CreateOrResizeSwapChainAndFrameBuffer(int w, int h) static void CreateOrResizeSwapChainAndFrameBuffer(WindowData* wd, int w, int h)
{ {
VkResult err; VkResult err;
VkSwapchainKHR old_swapchain = g_Swapchain; VkSwapchainKHR old_swapchain = wd->Swapchain;
err = vkDeviceWaitIdle(g_Device); err = vkDeviceWaitIdle(g_Device);
check_vk_result(err); check_vk_result(err);
// Destroy old Framebuffer // Destroy old Framebuffer
for (uint32_t i = 0; i < g_BackBufferCount; i++) for (uint32_t i = 0; i < wd->BackBufferCount; i++)
{ {
if (g_BackBufferView[i]) if (wd->BackBufferView[i])
vkDestroyImageView(g_Device, g_BackBufferView[i], g_Allocator); vkDestroyImageView(g_Device, wd->BackBufferView[i], g_Allocator);
if (g_Framebuffer[i]) if (wd->Framebuffer[i])
vkDestroyFramebuffer(g_Device, g_Framebuffer[i], g_Allocator); vkDestroyFramebuffer(g_Device, wd->Framebuffer[i], g_Allocator);
} }
if (g_RenderPass) wd->BackBufferCount = 0;
vkDestroyRenderPass(g_Device, g_RenderPass, g_Allocator); if (wd->RenderPass)
vkDestroyRenderPass(g_Device, wd->RenderPass, g_Allocator);
// Create Swapchain // Create Swapchain
{ {
VkSwapchainCreateInfoKHR info = {}; VkSwapchainCreateInfoKHR info = {};
info.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR; info.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR;
info.surface = g_Surface; info.surface = wd->Surface;
info.imageFormat = g_SurfaceFormat.format; info.imageFormat = wd->SurfaceFormat.format;
info.imageColorSpace = g_SurfaceFormat.colorSpace; info.imageColorSpace = wd->SurfaceFormat.colorSpace;
info.imageArrayLayers = 1; info.imageArrayLayers = 1;
info.imageUsage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT; info.imageUsage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
info.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE; // Assume that graphics family == present family info.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE; // Assume that graphics family == present family
info.preTransform = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR; info.preTransform = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR;
info.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR; info.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
info.presentMode = g_PresentMode; info.presentMode = wd->PresentMode;
info.clipped = VK_TRUE; info.clipped = VK_TRUE;
info.oldSwapchain = old_swapchain; info.oldSwapchain = old_swapchain;
VkSurfaceCapabilitiesKHR cap; VkSurfaceCapabilitiesKHR cap;
err = vkGetPhysicalDeviceSurfaceCapabilitiesKHR(g_PhysicalDevice, g_Surface, &cap); err = vkGetPhysicalDeviceSurfaceCapabilitiesKHR(g_PhysicalDevice, wd->Surface, &cap);
check_vk_result(err); check_vk_result(err);
if (cap.maxImageCount > 0) if (cap.maxImageCount > 0)
info.minImageCount = (cap.minImageCount + 2 < cap.maxImageCount) ? (cap.minImageCount + 2) : cap.maxImageCount; info.minImageCount = (cap.minImageCount + 2 < cap.maxImageCount) ? (cap.minImageCount + 2) : cap.maxImageCount;
@ -107,19 +135,19 @@ static void CreateOrResizeSwapChainAndFrameBuffer(int w, int h)
if (cap.currentExtent.width == 0xffffffff) if (cap.currentExtent.width == 0xffffffff)
{ {
info.imageExtent.width = fb_width = w; info.imageExtent.width = wd->Width = w;
info.imageExtent.height = fb_height = h; info.imageExtent.height = wd->Height = h;
} }
else else
{ {
info.imageExtent.width = fb_width = cap.currentExtent.width; info.imageExtent.width = wd->Width = cap.currentExtent.width;
info.imageExtent.height = fb_height = cap.currentExtent.height; info.imageExtent.height = wd->Height = cap.currentExtent.height;
} }
err = vkCreateSwapchainKHR(g_Device, &info, g_Allocator, &g_Swapchain); err = vkCreateSwapchainKHR(g_Device, &info, g_Allocator, &wd->Swapchain);
check_vk_result(err); check_vk_result(err);
err = vkGetSwapchainImagesKHR(g_Device, g_Swapchain, &g_BackBufferCount, NULL); err = vkGetSwapchainImagesKHR(g_Device, wd->Swapchain, &wd->BackBufferCount, NULL);
check_vk_result(err); check_vk_result(err);
err = vkGetSwapchainImagesKHR(g_Device, g_Swapchain, &g_BackBufferCount, g_BackBuffer); err = vkGetSwapchainImagesKHR(g_Device, wd->Swapchain, &wd->BackBufferCount, wd->BackBuffer);
check_vk_result(err); check_vk_result(err);
} }
if (old_swapchain) if (old_swapchain)
@ -128,7 +156,7 @@ static void CreateOrResizeSwapChainAndFrameBuffer(int w, int h)
// Create the Render Pass // Create the Render Pass
{ {
VkAttachmentDescription attachment = {}; VkAttachmentDescription attachment = {};
attachment.format = g_SurfaceFormat.format; attachment.format = wd->SurfaceFormat.format;
attachment.samples = VK_SAMPLE_COUNT_1_BIT; attachment.samples = VK_SAMPLE_COUNT_1_BIT;
attachment.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR; attachment.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
attachment.storeOp = VK_ATTACHMENT_STORE_OP_STORE; attachment.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
@ -149,7 +177,7 @@ static void CreateOrResizeSwapChainAndFrameBuffer(int w, int h)
info.pAttachments = &attachment; info.pAttachments = &attachment;
info.subpassCount = 1; info.subpassCount = 1;
info.pSubpasses = &subpass; info.pSubpasses = &subpass;
err = vkCreateRenderPass(g_Device, &info, g_Allocator, &g_RenderPass); err = vkCreateRenderPass(g_Device, &info, g_Allocator, &wd->RenderPass);
check_vk_result(err); check_vk_result(err);
} }
@ -158,17 +186,17 @@ static void CreateOrResizeSwapChainAndFrameBuffer(int w, int h)
VkImageViewCreateInfo info = {}; VkImageViewCreateInfo info = {};
info.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO; info.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
info.viewType = VK_IMAGE_VIEW_TYPE_2D; info.viewType = VK_IMAGE_VIEW_TYPE_2D;
info.format = g_SurfaceFormat.format; info.format = wd->SurfaceFormat.format;
info.components.r = VK_COMPONENT_SWIZZLE_R; info.components.r = VK_COMPONENT_SWIZZLE_R;
info.components.g = VK_COMPONENT_SWIZZLE_G; info.components.g = VK_COMPONENT_SWIZZLE_G;
info.components.b = VK_COMPONENT_SWIZZLE_B; info.components.b = VK_COMPONENT_SWIZZLE_B;
info.components.a = VK_COMPONENT_SWIZZLE_A; info.components.a = VK_COMPONENT_SWIZZLE_A;
VkImageSubresourceRange image_range = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1 }; VkImageSubresourceRange image_range = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1 };
info.subresourceRange = image_range; info.subresourceRange = image_range;
for (uint32_t i = 0; i < g_BackBufferCount; i++) for (uint32_t i = 0; i < wd->BackBufferCount; i++)
{ {
info.image = g_BackBuffer[i]; info.image = wd->BackBuffer[i];
err = vkCreateImageView(g_Device, &info, g_Allocator, &g_BackBufferView[i]); err = vkCreateImageView(g_Device, &info, g_Allocator, &wd->BackBufferView[i]);
check_vk_result(err); check_vk_result(err);
} }
} }
@ -178,26 +206,21 @@ static void CreateOrResizeSwapChainAndFrameBuffer(int w, int h)
VkImageView attachment[1]; VkImageView attachment[1];
VkFramebufferCreateInfo info = {}; VkFramebufferCreateInfo info = {};
info.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO; info.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO;
info.renderPass = g_RenderPass; info.renderPass = wd->RenderPass;
info.attachmentCount = 1; info.attachmentCount = 1;
info.pAttachments = attachment; info.pAttachments = attachment;
info.width = fb_width; info.width = wd->Width;
info.height = fb_height; info.height = wd->Height;
info.layers = 1; info.layers = 1;
for (uint32_t i = 0; i < g_BackBufferCount; i++) for (uint32_t i = 0; i < wd->BackBufferCount; i++)
{ {
attachment[0] = g_BackBufferView[i]; attachment[0] = wd->BackBufferView[i];
err = vkCreateFramebuffer(g_Device, &info, g_Allocator, &g_Framebuffer[i]); err = vkCreateFramebuffer(g_Device, &info, g_Allocator, &wd->Framebuffer[i]);
check_vk_result(err); check_vk_result(err);
} }
} }
} }
static void GlfwResizeCallback(GLFWwindow*, int w, int h)
{
CreateOrResizeSwapChainAndFrameBuffer(w, h);
}
#ifdef IMGUI_VULKAN_DEBUG_REPORT #ifdef IMGUI_VULKAN_DEBUG_REPORT
static VKAPI_ATTR VkBool32 VKAPI_CALL debug_report(VkDebugReportFlagsEXT flags, VkDebugReportObjectTypeEXT objectType, uint64_t object, size_t location, int32_t messageCode, const char* pLayerPrefix, const char* pMessage, void* pUserData) static VKAPI_ATTR VkBool32 VKAPI_CALL debug_report(VkDebugReportFlagsEXT flags, VkDebugReportObjectTypeEXT objectType, uint64_t object, size_t location, int32_t messageCode, const char* pLayerPrefix, const char* pMessage, void* pUserData)
{ {
@ -207,7 +230,7 @@ static VKAPI_ATTR VkBool32 VKAPI_CALL debug_report(VkDebugReportFlagsEXT flags,
} }
#endif // IMGUI_VULKAN_DEBUG_REPORT #endif // IMGUI_VULKAN_DEBUG_REPORT
static void setup_vulkan(GLFWwindow* window, const char** extensions, uint32_t extensions_count) static void CreateVulkanInstance(const char** extensions, uint32_t extensions_count)
{ {
VkResult err; VkResult err;
@ -252,12 +275,11 @@ static void setup_vulkan(GLFWwindow* window, const char** extensions, uint32_t e
check_vk_result(err); check_vk_result(err);
#endif // IMGUI_VULKAN_DEBUG_REPORT #endif // IMGUI_VULKAN_DEBUG_REPORT
} }
}
// Create Window Surface (with GLFW) static void SetupVulkan(WindowData* wd)
{ {
err = glfwCreateWindowSurface(g_Instance, window, g_Allocator, &g_Surface); VkResult err;
check_vk_result(err);
}
// Select GPU // Select GPU
{ {
@ -295,7 +317,7 @@ static void setup_vulkan(GLFWwindow* window, const char** extensions, uint32_t e
// Check for WSI support // Check for WSI support
{ {
VkBool32 res; VkBool32 res;
vkGetPhysicalDeviceSurfaceSupportKHR(g_PhysicalDevice, g_QueueFamily, g_Surface, &res); vkGetPhysicalDeviceSurfaceSupportKHR(g_PhysicalDevice, g_QueueFamily, wd->Surface, &res);
if (res != VK_TRUE) if (res != VK_TRUE)
{ {
fprintf(stderr, "Error no WSI support on physical device 0\n"); fprintf(stderr, "Error no WSI support on physical device 0\n");
@ -308,7 +330,7 @@ static void setup_vulkan(GLFWwindow* window, const char** extensions, uint32_t e
{ {
const VkFormat requestSurfaceImageFormat[] = { VK_FORMAT_B8G8R8A8_UNORM, VK_FORMAT_R8G8B8A8_UNORM, VK_FORMAT_B8G8R8_UNORM, VK_FORMAT_R8G8B8_UNORM }; const VkFormat requestSurfaceImageFormat[] = { VK_FORMAT_B8G8R8A8_UNORM, VK_FORMAT_R8G8B8A8_UNORM, VK_FORMAT_B8G8R8_UNORM, VK_FORMAT_R8G8B8_UNORM };
const VkColorSpaceKHR requestSurfaceColorSpace = VK_COLORSPACE_SRGB_NONLINEAR_KHR; const VkColorSpaceKHR requestSurfaceColorSpace = VK_COLORSPACE_SRGB_NONLINEAR_KHR;
g_SurfaceFormat = ImGui_ImplVulkan_SelectSurfaceFormat(g_PhysicalDevice, g_Surface, requestSurfaceImageFormat, (size_t)IM_ARRAYSIZE(requestSurfaceImageFormat), requestSurfaceColorSpace); wd->SurfaceFormat = ImGui_ImplVulkan_SelectSurfaceFormat(g_PhysicalDevice, wd->Surface, requestSurfaceImageFormat, (size_t)IM_ARRAYSIZE(requestSurfaceImageFormat), requestSurfaceColorSpace);
} }
@ -319,7 +341,7 @@ static void setup_vulkan(GLFWwindow* window, const char** extensions, uint32_t e
#else #else
VkPresentModeKHR present_mode = VK_PRESENT_MODE_FIFO_KHR; VkPresentModeKHR present_mode = VK_PRESENT_MODE_FIFO_KHR;
#endif #endif
g_PresentMode = ImGui_ImplVulkan_SelectPresentMode(g_PhysicalDevice, g_Surface, &present_mode, 1); wd->PresentMode = ImGui_ImplVulkan_SelectPresentMode(g_PhysicalDevice, wd->Surface, &present_mode, 1);
} }
@ -344,20 +366,10 @@ static void setup_vulkan(GLFWwindow* window, const char** extensions, uint32_t e
vkGetDeviceQueue(g_Device, g_QueueFamily, 0, &g_Queue); vkGetDeviceQueue(g_Device, g_QueueFamily, 0, &g_Queue);
} }
// Create Framebuffers
{
int w, h;
glfwGetFramebufferSize(window, &w, &h);
CreateOrResizeSwapChainAndFrameBuffer(w, h);
glfwSetFramebufferSizeCallback(window, GlfwResizeCallback);
}
// Create Command Buffers // Create Command Buffers
for (int i = 0; i < IMGUI_VK_QUEUED_FRAMES; i++) for (int i = 0; i < IMGUI_VK_QUEUED_FRAMES; i++)
{ {
FrameData* fd = &g_Frames[i]; FrameData* fd = &wd->Frames[i];
{ {
VkCommandPoolCreateInfo info = {}; VkCommandPoolCreateInfo info = {};
info.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO; info.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO;
@ -421,24 +433,25 @@ static void setup_vulkan(GLFWwindow* window, const char** extensions, uint32_t e
static void cleanup_vulkan() static void cleanup_vulkan()
{ {
WindowData* wd = &g_WindowData;
vkDestroyDescriptorPool(g_Device, g_DescriptorPool, g_Allocator); vkDestroyDescriptorPool(g_Device, g_DescriptorPool, g_Allocator);
for (int i = 0; i < IMGUI_VK_QUEUED_FRAMES; i++) for (int i = 0; i < IMGUI_VK_QUEUED_FRAMES; i++)
{ {
FrameData* fd = &g_Frames[i]; FrameData* fd = &wd->Frames[i];
vkDestroyFence(g_Device, fd->Fence, g_Allocator); vkDestroyFence(g_Device, fd->Fence, g_Allocator);
vkFreeCommandBuffers(g_Device, fd->CommandPool, 1, &fd->CommandBuffer); vkFreeCommandBuffers(g_Device, fd->CommandPool, 1, &fd->CommandBuffer);
vkDestroyCommandPool(g_Device, fd->CommandPool, g_Allocator); vkDestroyCommandPool(g_Device, fd->CommandPool, g_Allocator);
vkDestroySemaphore(g_Device, fd->PresentCompleteSemaphore, g_Allocator); vkDestroySemaphore(g_Device, fd->PresentCompleteSemaphore, g_Allocator);
vkDestroySemaphore(g_Device, fd->RenderCompleteSemaphore, g_Allocator); vkDestroySemaphore(g_Device, fd->RenderCompleteSemaphore, g_Allocator);
} }
for (uint32_t i = 0; i < g_BackBufferCount; i++) for (uint32_t i = 0; i < wd->BackBufferCount; i++)
{ {
vkDestroyImageView(g_Device, g_BackBufferView[i], g_Allocator); vkDestroyImageView(g_Device, wd->BackBufferView[i], g_Allocator);
vkDestroyFramebuffer(g_Device, g_Framebuffer[i], g_Allocator); vkDestroyFramebuffer(g_Device, wd->Framebuffer[i], g_Allocator);
} }
vkDestroyRenderPass(g_Device, g_RenderPass, g_Allocator); vkDestroyRenderPass(g_Device, wd->RenderPass, g_Allocator);
vkDestroySwapchainKHR(g_Device, g_Swapchain, g_Allocator); vkDestroySwapchainKHR(g_Device, wd->Swapchain, g_Allocator);
vkDestroySurfaceKHR(g_Instance, g_Surface, g_Allocator); vkDestroySurfaceKHR(g_Instance, wd->Surface, g_Allocator);
#ifdef IMGUI_VULKAN_DEBUG_REPORT #ifdef IMGUI_VULKAN_DEBUG_REPORT
// Remove the debug report callback // Remove the debug report callback
@ -450,9 +463,9 @@ static void cleanup_vulkan()
vkDestroyInstance(g_Instance, g_Allocator); vkDestroyInstance(g_Instance, g_Allocator);
} }
static void frame_begin() static void frame_begin(WindowData* wd)
{ {
FrameData* fd = &g_Frames[g_FrameIndex]; FrameData* fd = &wd->Frames[wd->FrameIndex];
VkResult err; VkResult err;
for (;;) for (;;)
{ {
@ -462,7 +475,7 @@ static void frame_begin()
check_vk_result(err); check_vk_result(err);
} }
{ {
err = vkAcquireNextImageKHR(g_Device, g_Swapchain, UINT64_MAX, fd->PresentCompleteSemaphore, VK_NULL_HANDLE, &fd->BackbufferIndex); err = vkAcquireNextImageKHR(g_Device, wd->Swapchain, UINT64_MAX, fd->PresentCompleteSemaphore, VK_NULL_HANDLE, &fd->BackbufferIndex);
check_vk_result(err); check_vk_result(err);
} }
{ {
@ -477,19 +490,19 @@ static void frame_begin()
{ {
VkRenderPassBeginInfo info = {}; VkRenderPassBeginInfo info = {};
info.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO; info.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
info.renderPass = g_RenderPass; info.renderPass = wd->RenderPass;
info.framebuffer = g_Framebuffer[fd->BackbufferIndex]; info.framebuffer = wd->Framebuffer[fd->BackbufferIndex];
info.renderArea.extent.width = fb_width; info.renderArea.extent.width = wd->Width;
info.renderArea.extent.height = fb_height; info.renderArea.extent.height = wd->Height;
info.clearValueCount = 1; info.clearValueCount = 1;
info.pClearValues = &g_ClearValue; info.pClearValues = &wd->ClearValue;
vkCmdBeginRenderPass(fd->CommandBuffer, &info, VK_SUBPASS_CONTENTS_INLINE); vkCmdBeginRenderPass(fd->CommandBuffer, &info, VK_SUBPASS_CONTENTS_INLINE);
} }
} }
static void frame_end() static void frame_end(WindowData* wd)
{ {
FrameData* fd = &g_Frames[g_FrameIndex]; FrameData* fd = &wd->Frames[wd->FrameIndex];
VkResult err; VkResult err;
vkCmdEndRenderPass(fd->CommandBuffer); vkCmdEndRenderPass(fd->CommandBuffer);
{ {
@ -513,23 +526,23 @@ static void frame_end()
} }
} }
static void frame_present() static void frame_present(WindowData* wd)
{ {
VkResult err; VkResult err;
// If IMGUI_UNLIMITED_FRAME_RATE is defined we present the latest but one frame. Otherwise we present the latest rendered frame // 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 #ifdef IMGUI_UNLIMITED_FRAME_RATE
uint32_t PresentIndex = (g_FrameIndex + IMGUI_VK_QUEUED_FRAMES - 1) % IMGUI_VK_QUEUED_FRAMES; uint32_t PresentIndex = (wd->FrameIndex + IMGUI_VK_QUEUED_FRAMES - 1) % IMGUI_VK_QUEUED_FRAMES;
#else #else
uint32_t PresentIndex = g_FrameIndex; uint32_t PresentIndex = g_FrameIndex;
#endif // IMGUI_UNLIMITED_FRAME_RATE #endif // IMGUI_UNLIMITED_FRAME_RATE
FrameData* fd = &g_Frames[PresentIndex]; FrameData* fd = &wd->Frames[PresentIndex];
VkPresentInfoKHR info = {}; VkPresentInfoKHR info = {};
info.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR; info.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR;
info.waitSemaphoreCount = 1; info.waitSemaphoreCount = 1;
info.pWaitSemaphores = &fd->RenderCompleteSemaphore; info.pWaitSemaphores = &fd->RenderCompleteSemaphore;
info.swapchainCount = 1; info.swapchainCount = 1;
info.pSwapchains = &g_Swapchain; info.pSwapchains = &wd->Swapchain;
info.pImageIndices = &fd->BackbufferIndex; info.pImageIndices = &fd->BackbufferIndex;
err = vkQueuePresentKHR(g_Queue, &info); err = vkQueuePresentKHR(g_Queue, &info);
check_vk_result(err); check_vk_result(err);
@ -540,6 +553,11 @@ static void glfw_error_callback(int error, const char* description)
fprintf(stderr, "Glfw Error %d: %s\n", error, description); fprintf(stderr, "Glfw Error %d: %s\n", error, description);
} }
static void glfw_resize_callback(GLFWwindow*, int w, int h)
{
CreateOrResizeSwapChainAndFrameBuffer(&g_WindowData, w, h);
}
int main(int, char**) int main(int, char**)
{ {
// Setup window // Setup window
@ -556,9 +574,26 @@ int main(int, char**)
printf("GLFW: Vulkan Not Supported\n"); printf("GLFW: Vulkan Not Supported\n");
return 1; return 1;
} }
uint32_t extensions_count = 0; uint32_t glfw_extensions_count = 0;
const char** glfw_extensions = glfwGetRequiredInstanceExtensions(&extensions_count); const char** glfw_extensions = glfwGetRequiredInstanceExtensions(&glfw_extensions_count);
setup_vulkan(window, glfw_extensions, extensions_count); CreateVulkanInstance(glfw_extensions, glfw_extensions_count);
// Create Window Surface
WindowData* wd = &g_WindowData;
{
VkResult err = glfwCreateWindowSurface(g_Instance, window, g_Allocator, &wd->Surface);
check_vk_result(err);
}
SetupVulkan(wd);
// Create Framebuffers
{
int w, h;
glfwGetFramebufferSize(window, &w, &h);
CreateOrResizeSwapChainAndFrameBuffer(wd, w, h);
glfwSetFramebufferSizeCallback(window, glfw_resize_callback);
}
// Setup ImGui binding // Setup ImGui binding
ImGui::CreateContext(); ImGui::CreateContext();
@ -567,7 +602,7 @@ int main(int, char**)
init_info.Allocator = g_Allocator; init_info.Allocator = g_Allocator;
init_info.PhysicalDevice = g_PhysicalDevice; init_info.PhysicalDevice = g_PhysicalDevice;
init_info.Device = g_Device; init_info.Device = g_Device;
init_info.RenderPass = g_RenderPass; init_info.RenderPass = wd->RenderPass;
init_info.PipelineCache = g_PipelineCache; init_info.PipelineCache = g_PipelineCache;
init_info.DescriptorPool = g_DescriptorPool; init_info.DescriptorPool = g_DescriptorPool;
init_info.CheckVkResultFn = check_vk_result; init_info.CheckVkResultFn = check_vk_result;
@ -601,8 +636,8 @@ int main(int, char**)
// Upload Fonts // Upload Fonts
{ {
// Use any command queue // Use any command queue
VkCommandPool command_pool = g_Frames[g_FrameIndex].CommandPool; VkCommandPool command_pool = wd->Frames[wd->FrameIndex].CommandPool;
VkCommandBuffer command_buffer = g_Frames[g_FrameIndex].CommandBuffer; VkCommandBuffer command_buffer = wd->Frames[wd->FrameIndex].CommandBuffer;
VkResult err; VkResult err;
err = vkResetCommandPool(g_Device, command_pool, 0); err = vkResetCommandPool(g_Device, command_pool, 0);
@ -684,21 +719,21 @@ int main(int, char**)
} }
// Rendering // Rendering
memcpy(&g_ClearValue.color.float32[0], &clear_color, 4 * sizeof(float)); memcpy(&wd->ClearValue.color.float32[0], &clear_color, 4 * sizeof(float));
frame_begin(); frame_begin(wd);
ImGui_ImplVulkan_Render(g_Frames[g_FrameIndex].CommandBuffer); ImGui_ImplVulkan_Render(wd->Frames[wd->FrameIndex].CommandBuffer);
frame_end(); frame_end(wd);
// 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.
#ifdef IMGUI_UNLIMITED_FRAME_RATE #ifdef IMGUI_UNLIMITED_FRAME_RATE
// 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 FrameIndex without presenting.
if (swap_chain_has_at_least_one_image) if (swap_chain_has_at_least_one_image)
frame_present(); frame_present(wd);
#else #else
frame_present(); frame_present(wd);
#endif #endif
swap_chain_has_at_least_one_image = true; swap_chain_has_at_least_one_image = true;
g_FrameIndex = (g_FrameIndex + 1) % IMGUI_VK_QUEUED_FRAMES; wd->FrameIndex = (wd->FrameIndex + 1) % IMGUI_VK_QUEUED_FRAMES;
// FIXME-PLATFORM // FIXME-PLATFORM
ImGui::UpdatePlatformWindows(); ImGui::UpdatePlatformWindows();