source: opengl-game/IMGUI/imgui_impl_vulkan.cpp@ 3f32dfd

feature/imgui-sdl
Last change on this file since 3f32dfd was 6493e43, checked in by Dmitry Portnoy <dportnoy@…>, 4 years ago

In sdl-game, add support for using separate graphics and present queues, and move the example ImGui code for (re)creating the swapchain into my own files
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[3b7d497]1// dear imgui: Renderer for Vulkan
2// This needs to be used along with a Platform Binding (e.g. GLFW, SDL, Win32, custom..)
3
4// Implemented features:
5// [X] Renderer: Support for large meshes (64k+ vertices) with 16-bit indices.
6// Missing features:
7// [ ] Renderer: User texture binding. Changes of ImTextureID aren't supported by this binding! See https://github.com/ocornut/imgui/pull/914
8
9// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
10// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp.
11// https://github.com/ocornut/imgui
12
13// The aim of imgui_impl_vulkan.h/.cpp is to be usable in your engine without any modification.
14// IF YOU FEEL YOU NEED TO MAKE ANY CHANGE TO THIS CODE, please share them and your feedback at https://github.com/ocornut/imgui/
15
16// Important note to the reader who wish to integrate imgui_impl_vulkan.cpp/.h in their own engine/app.
17// - Common ImGui_ImplVulkan_XXX functions and structures are used to interface with imgui_impl_vulkan.cpp/.h.
18// You will use those if you want to use this rendering back-end in your engine/app.
19// - Helper ImGui_ImplVulkanH_XXX functions and structures are only used by this example (main.cpp) and by
20// the back-end itself (imgui_impl_vulkan.cpp), but should PROBABLY NOT be used by your own engine/app code.
21// Read comments in imgui_impl_vulkan.h.
22
23// CHANGELOG
24// (minor and older changes stripped away, please see git history for details)
25// 2020-09-07: Vulkan: Added VkPipeline parameter to ImGui_ImplVulkan_RenderDrawData (default to one passed to ImGui_ImplVulkan_Init).
26// 2020-05-04: Vulkan: Fixed crash if initial frame has no vertices.
27// 2020-04-26: Vulkan: Fixed edge case where render callbacks wouldn't be called if the ImDrawData didn't have vertices.
28// 2019-08-01: Vulkan: Added support for specifying multisample count. Set ImGui_ImplVulkan_InitInfo::MSAASamples to one of the VkSampleCountFlagBits values to use, default is non-multisampled as before.
29// 2019-05-29: Vulkan: Added support for large mesh (64K+ vertices), enable ImGuiBackendFlags_RendererHasVtxOffset flag.
30// 2019-04-30: Vulkan: Added support for special ImDrawCallback_ResetRenderState callback to reset render state.
31// 2019-04-04: *BREAKING CHANGE*: Vulkan: Added ImageCount/MinImageCount fields in ImGui_ImplVulkan_InitInfo, required for initialization (was previously a hard #define IMGUI_VK_QUEUED_FRAMES 2). Added ImGui_ImplVulkan_SetMinImageCount().
32// 2019-04-04: Vulkan: Added VkInstance argument to ImGui_ImplVulkanH_CreateWindow() optional helper.
33// 2019-04-04: Vulkan: Avoid passing negative coordinates to vkCmdSetScissor, which debug validation layers do not like.
34// 2019-04-01: Vulkan: Support for 32-bit index buffer (#define ImDrawIdx unsigned int).
35// 2019-02-16: Vulkan: Viewport and clipping rectangles correctly using draw_data->FramebufferScale to allow retina display.
36// 2018-11-30: Misc: Setting up io.BackendRendererName so it can be displayed in the About Window.
37// 2018-08-25: Vulkan: Fixed mishandled VkSurfaceCapabilitiesKHR::maxImageCount=0 case.
38// 2018-06-22: Inverted the parameters to ImGui_ImplVulkan_RenderDrawData() to be consistent with other bindings.
39// 2018-06-08: Misc: Extracted imgui_impl_vulkan.cpp/.h away from the old combined GLFW+Vulkan example.
40// 2018-06-08: Vulkan: Use draw_data->DisplayPos and draw_data->DisplaySize to setup projection matrix and clipping rectangle.
41// 2018-03-03: Vulkan: Various refactor, created a couple of ImGui_ImplVulkanH_XXX helper that the example can use and that viewport support will use.
42// 2018-03-01: Vulkan: Renamed ImGui_ImplVulkan_Init_Info to ImGui_ImplVulkan_InitInfo and fields to match more closely Vulkan terminology.
43// 2018-02-16: Misc: Obsoleted the io.RenderDrawListsFn callback, ImGui_ImplVulkan_Render() calls ImGui_ImplVulkan_RenderDrawData() itself.
44// 2018-02-06: Misc: Removed call to ImGui::Shutdown() which is not available from 1.60 WIP, user needs to call CreateContext/DestroyContext themselves.
45// 2017-05-15: Vulkan: Fix scissor offset being negative. Fix new Vulkan validation warnings. Set required depth member for buffer image copy.
46// 2016-11-13: Vulkan: Fix validation layer warnings and errors and redeclare gl_PerVertex.
47// 2016-10-18: Vulkan: Add location decorators & change to use structs as in/out in glsl, update embedded spv (produced with glslangValidator -x). Null the released resources.
48// 2016-08-27: Vulkan: Fix Vulkan example for use when a depth buffer is active.
49
50#include "imgui.h"
51#include "imgui_impl_vulkan.h"
52#include <stdio.h>
53
54// Reusable buffers used for rendering 1 current in-flight frame, for ImGui_ImplVulkan_RenderDrawData()
55// [Please zero-clear before use!]
56struct ImGui_ImplVulkanH_FrameRenderBuffers
57{
58 VkDeviceMemory VertexBufferMemory;
59 VkDeviceMemory IndexBufferMemory;
60 VkDeviceSize VertexBufferSize;
61 VkDeviceSize IndexBufferSize;
62 VkBuffer VertexBuffer;
63 VkBuffer IndexBuffer;
64};
65
66// Each viewport will hold 1 ImGui_ImplVulkanH_WindowRenderBuffers
67// [Please zero-clear before use!]
68struct ImGui_ImplVulkanH_WindowRenderBuffers
69{
70 uint32_t Index;
71 uint32_t Count;
72 ImGui_ImplVulkanH_FrameRenderBuffers* FrameRenderBuffers;
73};
74
75// Vulkan data
76static ImGui_ImplVulkan_InitInfo g_VulkanInitInfo = {};
77static VkRenderPass g_RenderPass = VK_NULL_HANDLE;
78static VkDeviceSize g_BufferMemoryAlignment = 256;
79static VkPipelineCreateFlags g_PipelineCreateFlags = 0x00;
80static VkDescriptorSetLayout g_DescriptorSetLayout = VK_NULL_HANDLE;
81static VkPipelineLayout g_PipelineLayout = VK_NULL_HANDLE;
82static VkDescriptorSet g_DescriptorSet = VK_NULL_HANDLE;
83static VkPipeline g_Pipeline = VK_NULL_HANDLE;
84static VkShaderModule g_ShaderModuleVert;
85static VkShaderModule g_ShaderModuleFrag;
86
87// Font data
88static VkSampler g_FontSampler = VK_NULL_HANDLE;
89static VkDeviceMemory g_FontMemory = VK_NULL_HANDLE;
90static VkImage g_FontImage = VK_NULL_HANDLE;
91static VkImageView g_FontView = VK_NULL_HANDLE;
92static VkDeviceMemory g_UploadBufferMemory = VK_NULL_HANDLE;
93static VkBuffer g_UploadBuffer = VK_NULL_HANDLE;
94
95// Render buffers
96static ImGui_ImplVulkanH_WindowRenderBuffers g_MainWindowRenderBuffers;
97
98// Forward Declarations
99bool ImGui_ImplVulkan_CreateDeviceObjects();
100void ImGui_ImplVulkan_DestroyDeviceObjects();
101void ImGui_ImplVulkanH_DestroyFrame(VkDevice device, ImGui_ImplVulkanH_Frame* fd, const VkAllocationCallbacks* allocator);
102void ImGui_ImplVulkanH_DestroyFrameSemaphores(VkDevice device, ImGui_ImplVulkanH_FrameSemaphores* fsd, const VkAllocationCallbacks* allocator);
103void ImGui_ImplVulkanH_DestroyFrameRenderBuffers(VkDevice device, ImGui_ImplVulkanH_FrameRenderBuffers* buffers, const VkAllocationCallbacks* allocator);
104void ImGui_ImplVulkanH_DestroyWindowRenderBuffers(VkDevice device, ImGui_ImplVulkanH_WindowRenderBuffers* buffers, const VkAllocationCallbacks* allocator);
105void ImGui_ImplVulkanH_CreateWindowCommandBuffers(VkPhysicalDevice physical_device, VkDevice device, ImGui_ImplVulkanH_Window* wd, uint32_t queue_family, const VkAllocationCallbacks* allocator);
106
107//-----------------------------------------------------------------------------
108// SHADERS
109//-----------------------------------------------------------------------------
110
111// glsl_shader.vert, compiled with:
112// # glslangValidator -V -x -o glsl_shader.vert.u32 glsl_shader.vert
113/*
114#version 450 core
115layout(location = 0) in vec2 aPos;
116layout(location = 1) in vec2 aUV;
117layout(location = 2) in vec4 aColor;
118layout(push_constant) uniform uPushConstant { vec2 uScale; vec2 uTranslate; } pc;
119
120out gl_PerVertex { vec4 gl_Position; };
121layout(location = 0) out struct { vec4 Color; vec2 UV; } Out;
122
123void main()
124{
125 Out.Color = aColor;
126 Out.UV = aUV;
127 gl_Position = vec4(aPos * pc.uScale + pc.uTranslate, 0, 1);
128}
129*/
130static uint32_t __glsl_shader_vert_spv[] =
131{
132 0x07230203,0x00010000,0x00080001,0x0000002e,0x00000000,0x00020011,0x00000001,0x0006000b,
133 0x00000001,0x4c534c47,0x6474732e,0x3035342e,0x00000000,0x0003000e,0x00000000,0x00000001,
134 0x000a000f,0x00000000,0x00000004,0x6e69616d,0x00000000,0x0000000b,0x0000000f,0x00000015,
135 0x0000001b,0x0000001c,0x00030003,0x00000002,0x000001c2,0x00040005,0x00000004,0x6e69616d,
136 0x00000000,0x00030005,0x00000009,0x00000000,0x00050006,0x00000009,0x00000000,0x6f6c6f43,
137 0x00000072,0x00040006,0x00000009,0x00000001,0x00005655,0x00030005,0x0000000b,0x0074754f,
138 0x00040005,0x0000000f,0x6c6f4361,0x0000726f,0x00030005,0x00000015,0x00565561,0x00060005,
139 0x00000019,0x505f6c67,0x65567265,0x78657472,0x00000000,0x00060006,0x00000019,0x00000000,
140 0x505f6c67,0x7469736f,0x006e6f69,0x00030005,0x0000001b,0x00000000,0x00040005,0x0000001c,
141 0x736f5061,0x00000000,0x00060005,0x0000001e,0x73755075,0x6e6f4368,0x6e617473,0x00000074,
142 0x00050006,0x0000001e,0x00000000,0x61635375,0x0000656c,0x00060006,0x0000001e,0x00000001,
143 0x61725475,0x616c736e,0x00006574,0x00030005,0x00000020,0x00006370,0x00040047,0x0000000b,
144 0x0000001e,0x00000000,0x00040047,0x0000000f,0x0000001e,0x00000002,0x00040047,0x00000015,
145 0x0000001e,0x00000001,0x00050048,0x00000019,0x00000000,0x0000000b,0x00000000,0x00030047,
146 0x00000019,0x00000002,0x00040047,0x0000001c,0x0000001e,0x00000000,0x00050048,0x0000001e,
147 0x00000000,0x00000023,0x00000000,0x00050048,0x0000001e,0x00000001,0x00000023,0x00000008,
148 0x00030047,0x0000001e,0x00000002,0x00020013,0x00000002,0x00030021,0x00000003,0x00000002,
149 0x00030016,0x00000006,0x00000020,0x00040017,0x00000007,0x00000006,0x00000004,0x00040017,
150 0x00000008,0x00000006,0x00000002,0x0004001e,0x00000009,0x00000007,0x00000008,0x00040020,
151 0x0000000a,0x00000003,0x00000009,0x0004003b,0x0000000a,0x0000000b,0x00000003,0x00040015,
152 0x0000000c,0x00000020,0x00000001,0x0004002b,0x0000000c,0x0000000d,0x00000000,0x00040020,
153 0x0000000e,0x00000001,0x00000007,0x0004003b,0x0000000e,0x0000000f,0x00000001,0x00040020,
154 0x00000011,0x00000003,0x00000007,0x0004002b,0x0000000c,0x00000013,0x00000001,0x00040020,
155 0x00000014,0x00000001,0x00000008,0x0004003b,0x00000014,0x00000015,0x00000001,0x00040020,
156 0x00000017,0x00000003,0x00000008,0x0003001e,0x00000019,0x00000007,0x00040020,0x0000001a,
157 0x00000003,0x00000019,0x0004003b,0x0000001a,0x0000001b,0x00000003,0x0004003b,0x00000014,
158 0x0000001c,0x00000001,0x0004001e,0x0000001e,0x00000008,0x00000008,0x00040020,0x0000001f,
159 0x00000009,0x0000001e,0x0004003b,0x0000001f,0x00000020,0x00000009,0x00040020,0x00000021,
160 0x00000009,0x00000008,0x0004002b,0x00000006,0x00000028,0x00000000,0x0004002b,0x00000006,
161 0x00000029,0x3f800000,0x00050036,0x00000002,0x00000004,0x00000000,0x00000003,0x000200f8,
162 0x00000005,0x0004003d,0x00000007,0x00000010,0x0000000f,0x00050041,0x00000011,0x00000012,
163 0x0000000b,0x0000000d,0x0003003e,0x00000012,0x00000010,0x0004003d,0x00000008,0x00000016,
164 0x00000015,0x00050041,0x00000017,0x00000018,0x0000000b,0x00000013,0x0003003e,0x00000018,
165 0x00000016,0x0004003d,0x00000008,0x0000001d,0x0000001c,0x00050041,0x00000021,0x00000022,
166 0x00000020,0x0000000d,0x0004003d,0x00000008,0x00000023,0x00000022,0x00050085,0x00000008,
167 0x00000024,0x0000001d,0x00000023,0x00050041,0x00000021,0x00000025,0x00000020,0x00000013,
168 0x0004003d,0x00000008,0x00000026,0x00000025,0x00050081,0x00000008,0x00000027,0x00000024,
169 0x00000026,0x00050051,0x00000006,0x0000002a,0x00000027,0x00000000,0x00050051,0x00000006,
170 0x0000002b,0x00000027,0x00000001,0x00070050,0x00000007,0x0000002c,0x0000002a,0x0000002b,
171 0x00000028,0x00000029,0x00050041,0x00000011,0x0000002d,0x0000001b,0x0000000d,0x0003003e,
172 0x0000002d,0x0000002c,0x000100fd,0x00010038
173};
174
175// glsl_shader.frag, compiled with:
176// # glslangValidator -V -x -o glsl_shader.frag.u32 glsl_shader.frag
177/*
178#version 450 core
179layout(location = 0) out vec4 fColor;
180layout(set=0, binding=0) uniform sampler2D sTexture;
181layout(location = 0) in struct { vec4 Color; vec2 UV; } In;
182void main()
183{
184 fColor = In.Color * texture(sTexture, In.UV.st);
185}
186*/
187static uint32_t __glsl_shader_frag_spv[] =
188{
189 0x07230203,0x00010000,0x00080001,0x0000001e,0x00000000,0x00020011,0x00000001,0x0006000b,
190 0x00000001,0x4c534c47,0x6474732e,0x3035342e,0x00000000,0x0003000e,0x00000000,0x00000001,
191 0x0007000f,0x00000004,0x00000004,0x6e69616d,0x00000000,0x00000009,0x0000000d,0x00030010,
192 0x00000004,0x00000007,0x00030003,0x00000002,0x000001c2,0x00040005,0x00000004,0x6e69616d,
193 0x00000000,0x00040005,0x00000009,0x6c6f4366,0x0000726f,0x00030005,0x0000000b,0x00000000,
194 0x00050006,0x0000000b,0x00000000,0x6f6c6f43,0x00000072,0x00040006,0x0000000b,0x00000001,
195 0x00005655,0x00030005,0x0000000d,0x00006e49,0x00050005,0x00000016,0x78655473,0x65727574,
196 0x00000000,0x00040047,0x00000009,0x0000001e,0x00000000,0x00040047,0x0000000d,0x0000001e,
197 0x00000000,0x00040047,0x00000016,0x00000022,0x00000000,0x00040047,0x00000016,0x00000021,
198 0x00000000,0x00020013,0x00000002,0x00030021,0x00000003,0x00000002,0x00030016,0x00000006,
199 0x00000020,0x00040017,0x00000007,0x00000006,0x00000004,0x00040020,0x00000008,0x00000003,
200 0x00000007,0x0004003b,0x00000008,0x00000009,0x00000003,0x00040017,0x0000000a,0x00000006,
201 0x00000002,0x0004001e,0x0000000b,0x00000007,0x0000000a,0x00040020,0x0000000c,0x00000001,
202 0x0000000b,0x0004003b,0x0000000c,0x0000000d,0x00000001,0x00040015,0x0000000e,0x00000020,
203 0x00000001,0x0004002b,0x0000000e,0x0000000f,0x00000000,0x00040020,0x00000010,0x00000001,
204 0x00000007,0x00090019,0x00000013,0x00000006,0x00000001,0x00000000,0x00000000,0x00000000,
205 0x00000001,0x00000000,0x0003001b,0x00000014,0x00000013,0x00040020,0x00000015,0x00000000,
206 0x00000014,0x0004003b,0x00000015,0x00000016,0x00000000,0x0004002b,0x0000000e,0x00000018,
207 0x00000001,0x00040020,0x00000019,0x00000001,0x0000000a,0x00050036,0x00000002,0x00000004,
208 0x00000000,0x00000003,0x000200f8,0x00000005,0x00050041,0x00000010,0x00000011,0x0000000d,
209 0x0000000f,0x0004003d,0x00000007,0x00000012,0x00000011,0x0004003d,0x00000014,0x00000017,
210 0x00000016,0x00050041,0x00000019,0x0000001a,0x0000000d,0x00000018,0x0004003d,0x0000000a,
211 0x0000001b,0x0000001a,0x00050057,0x00000007,0x0000001c,0x00000017,0x0000001b,0x00050085,
212 0x00000007,0x0000001d,0x00000012,0x0000001c,0x0003003e,0x00000009,0x0000001d,0x000100fd,
213 0x00010038
214};
215
216//-----------------------------------------------------------------------------
217// FUNCTIONS
218//-----------------------------------------------------------------------------
219
220static uint32_t ImGui_ImplVulkan_MemoryType(VkMemoryPropertyFlags properties, uint32_t type_bits)
221{
222 ImGui_ImplVulkan_InitInfo* v = &g_VulkanInitInfo;
223 VkPhysicalDeviceMemoryProperties prop;
224 vkGetPhysicalDeviceMemoryProperties(v->PhysicalDevice, &prop);
225 for (uint32_t i = 0; i < prop.memoryTypeCount; i++)
226 if ((prop.memoryTypes[i].propertyFlags & properties) == properties && type_bits & (1 << i))
227 return i;
228 return 0xFFFFFFFF; // Unable to find memoryType
229}
230
231static void check_vk_result(VkResult err)
232{
233 ImGui_ImplVulkan_InitInfo* v = &g_VulkanInitInfo;
234 if (v->CheckVkResultFn)
235 v->CheckVkResultFn(err);
236}
237
238static void CreateOrResizeBuffer(VkBuffer& buffer, VkDeviceMemory& buffer_memory, VkDeviceSize& p_buffer_size, size_t new_size, VkBufferUsageFlagBits usage)
239{
240 ImGui_ImplVulkan_InitInfo* v = &g_VulkanInitInfo;
241 VkResult err;
242 if (buffer != VK_NULL_HANDLE)
243 vkDestroyBuffer(v->Device, buffer, v->Allocator);
244 if (buffer_memory != VK_NULL_HANDLE)
245 vkFreeMemory(v->Device, buffer_memory, v->Allocator);
246
247 VkDeviceSize vertex_buffer_size_aligned = ((new_size - 1) / g_BufferMemoryAlignment + 1) * g_BufferMemoryAlignment;
248 VkBufferCreateInfo buffer_info = {};
249 buffer_info.sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO;
250 buffer_info.size = vertex_buffer_size_aligned;
251 buffer_info.usage = usage;
252 buffer_info.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
253 err = vkCreateBuffer(v->Device, &buffer_info, v->Allocator, &buffer);
254 check_vk_result(err);
255
256 VkMemoryRequirements req;
257 vkGetBufferMemoryRequirements(v->Device, buffer, &req);
258 g_BufferMemoryAlignment = (g_BufferMemoryAlignment > req.alignment) ? g_BufferMemoryAlignment : req.alignment;
259 VkMemoryAllocateInfo alloc_info = {};
260 alloc_info.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
261 alloc_info.allocationSize = req.size;
262 alloc_info.memoryTypeIndex = ImGui_ImplVulkan_MemoryType(VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT, req.memoryTypeBits);
263 err = vkAllocateMemory(v->Device, &alloc_info, v->Allocator, &buffer_memory);
264 check_vk_result(err);
265
266 err = vkBindBufferMemory(v->Device, buffer, buffer_memory, 0);
267 check_vk_result(err);
268 p_buffer_size = new_size;
269}
270
271static void ImGui_ImplVulkan_SetupRenderState(ImDrawData* draw_data, VkPipeline pipeline, VkCommandBuffer command_buffer, ImGui_ImplVulkanH_FrameRenderBuffers* rb, int fb_width, int fb_height)
272{
273 // Bind pipeline and descriptor sets:
274 {
275 vkCmdBindPipeline(command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline);
276 VkDescriptorSet desc_set[1] = { g_DescriptorSet };
277 vkCmdBindDescriptorSets(command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS, g_PipelineLayout, 0, 1, desc_set, 0, NULL);
278 }
279
280 // Bind Vertex And Index Buffer:
281 if (draw_data->TotalVtxCount > 0)
282 {
283 VkBuffer vertex_buffers[1] = { rb->VertexBuffer };
284 VkDeviceSize vertex_offset[1] = { 0 };
285 vkCmdBindVertexBuffers(command_buffer, 0, 1, vertex_buffers, vertex_offset);
286 vkCmdBindIndexBuffer(command_buffer, rb->IndexBuffer, 0, sizeof(ImDrawIdx) == 2 ? VK_INDEX_TYPE_UINT16 : VK_INDEX_TYPE_UINT32);
287 }
288
289 // Setup viewport:
290 {
291 VkViewport viewport;
292 viewport.x = 0;
293 viewport.y = 0;
294 viewport.width = (float)fb_width;
295 viewport.height = (float)fb_height;
296 viewport.minDepth = 0.0f;
297 viewport.maxDepth = 1.0f;
298 vkCmdSetViewport(command_buffer, 0, 1, &viewport);
299 }
300
301 // Setup scale and translation:
302 // Our visible imgui space lies from draw_data->DisplayPps (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right). DisplayPos is (0,0) for single viewport apps.
303 {
304 float scale[2];
305 scale[0] = 2.0f / draw_data->DisplaySize.x;
306 scale[1] = 2.0f / draw_data->DisplaySize.y;
307 float translate[2];
308 translate[0] = -1.0f - draw_data->DisplayPos.x * scale[0];
309 translate[1] = -1.0f - draw_data->DisplayPos.y * scale[1];
310 vkCmdPushConstants(command_buffer, g_PipelineLayout, VK_SHADER_STAGE_VERTEX_BIT, sizeof(float) * 0, sizeof(float) * 2, scale);
311 vkCmdPushConstants(command_buffer, g_PipelineLayout, VK_SHADER_STAGE_VERTEX_BIT, sizeof(float) * 2, sizeof(float) * 2, translate);
312 }
313}
314
315// Render function
316// (this used to be set in io.RenderDrawListsFn and called by ImGui::Render(), but you can now call this directly from your main loop)
317void ImGui_ImplVulkan_RenderDrawData(ImDrawData* draw_data, VkCommandBuffer command_buffer, VkPipeline pipeline)
318{
319 // Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates)
320 int fb_width = (int)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x);
321 int fb_height = (int)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y);
322 if (fb_width <= 0 || fb_height <= 0)
323 return;
324
325 ImGui_ImplVulkan_InitInfo* v = &g_VulkanInitInfo;
326 if (pipeline == VK_NULL_HANDLE)
327 pipeline = g_Pipeline;
328
329 // Allocate array to store enough vertex/index buffers
330 ImGui_ImplVulkanH_WindowRenderBuffers* wrb = &g_MainWindowRenderBuffers;
331 if (wrb->FrameRenderBuffers == NULL)
332 {
333 wrb->Index = 0;
334 wrb->Count = v->ImageCount;
335 wrb->FrameRenderBuffers = (ImGui_ImplVulkanH_FrameRenderBuffers*)IM_ALLOC(sizeof(ImGui_ImplVulkanH_FrameRenderBuffers) * wrb->Count);
336 memset(wrb->FrameRenderBuffers, 0, sizeof(ImGui_ImplVulkanH_FrameRenderBuffers) * wrb->Count);
337 }
338 IM_ASSERT(wrb->Count == v->ImageCount);
339 wrb->Index = (wrb->Index + 1) % wrb->Count;
340 ImGui_ImplVulkanH_FrameRenderBuffers* rb = &wrb->FrameRenderBuffers[wrb->Index];
341
342 if (draw_data->TotalVtxCount > 0)
343 {
344 // Create or resize the vertex/index buffers
345 size_t vertex_size = draw_data->TotalVtxCount * sizeof(ImDrawVert);
346 size_t index_size = draw_data->TotalIdxCount * sizeof(ImDrawIdx);
347 if (rb->VertexBuffer == VK_NULL_HANDLE || rb->VertexBufferSize < vertex_size)
348 CreateOrResizeBuffer(rb->VertexBuffer, rb->VertexBufferMemory, rb->VertexBufferSize, vertex_size, VK_BUFFER_USAGE_VERTEX_BUFFER_BIT);
349 if (rb->IndexBuffer == VK_NULL_HANDLE || rb->IndexBufferSize < index_size)
350 CreateOrResizeBuffer(rb->IndexBuffer, rb->IndexBufferMemory, rb->IndexBufferSize, index_size, VK_BUFFER_USAGE_INDEX_BUFFER_BIT);
351
352 // Upload vertex/index data into a single contiguous GPU buffer
353 ImDrawVert* vtx_dst = NULL;
354 ImDrawIdx* idx_dst = NULL;
355 VkResult err = vkMapMemory(v->Device, rb->VertexBufferMemory, 0, vertex_size, 0, (void**)(&vtx_dst));
356 check_vk_result(err);
357 err = vkMapMemory(v->Device, rb->IndexBufferMemory, 0, index_size, 0, (void**)(&idx_dst));
358 check_vk_result(err);
359 for (int n = 0; n < draw_data->CmdListsCount; n++)
360 {
361 const ImDrawList* cmd_list = draw_data->CmdLists[n];
362 memcpy(vtx_dst, cmd_list->VtxBuffer.Data, cmd_list->VtxBuffer.Size * sizeof(ImDrawVert));
363 memcpy(idx_dst, cmd_list->IdxBuffer.Data, cmd_list->IdxBuffer.Size * sizeof(ImDrawIdx));
364 vtx_dst += cmd_list->VtxBuffer.Size;
365 idx_dst += cmd_list->IdxBuffer.Size;
366 }
367 VkMappedMemoryRange range[2] = {};
368 range[0].sType = VK_STRUCTURE_TYPE_MAPPED_MEMORY_RANGE;
369 range[0].memory = rb->VertexBufferMemory;
370 range[0].size = VK_WHOLE_SIZE;
371 range[1].sType = VK_STRUCTURE_TYPE_MAPPED_MEMORY_RANGE;
372 range[1].memory = rb->IndexBufferMemory;
373 range[1].size = VK_WHOLE_SIZE;
374 err = vkFlushMappedMemoryRanges(v->Device, 2, range);
375 check_vk_result(err);
376 vkUnmapMemory(v->Device, rb->VertexBufferMemory);
377 vkUnmapMemory(v->Device, rb->IndexBufferMemory);
378 }
379
380 // Setup desired Vulkan state
381 ImGui_ImplVulkan_SetupRenderState(draw_data, pipeline, command_buffer, rb, fb_width, fb_height);
382
383 // Will project scissor/clipping rectangles into framebuffer space
384 ImVec2 clip_off = draw_data->DisplayPos; // (0,0) unless using multi-viewports
385 ImVec2 clip_scale = draw_data->FramebufferScale; // (1,1) unless using retina display which are often (2,2)
386
387 // Render command lists
388 // (Because we merged all buffers into a single one, we maintain our own offset into them)
389 int global_vtx_offset = 0;
390 int global_idx_offset = 0;
391 for (int n = 0; n < draw_data->CmdListsCount; n++)
392 {
393 const ImDrawList* cmd_list = draw_data->CmdLists[n];
394 for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
395 {
396 const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
397 if (pcmd->UserCallback != NULL)
398 {
399 // User callback, registered via ImDrawList::AddCallback()
400 // (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
401 if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
402 ImGui_ImplVulkan_SetupRenderState(draw_data, pipeline, command_buffer, rb, fb_width, fb_height);
403 else
404 pcmd->UserCallback(cmd_list, pcmd);
405 }
406 else
407 {
408 // Project scissor/clipping rectangles into framebuffer space
409 ImVec4 clip_rect;
410 clip_rect.x = (pcmd->ClipRect.x - clip_off.x) * clip_scale.x;
411 clip_rect.y = (pcmd->ClipRect.y - clip_off.y) * clip_scale.y;
412 clip_rect.z = (pcmd->ClipRect.z - clip_off.x) * clip_scale.x;
413 clip_rect.w = (pcmd->ClipRect.w - clip_off.y) * clip_scale.y;
414
415 if (clip_rect.x < fb_width && clip_rect.y < fb_height && clip_rect.z >= 0.0f && clip_rect.w >= 0.0f)
416 {
417 // Negative offsets are illegal for vkCmdSetScissor
418 if (clip_rect.x < 0.0f)
419 clip_rect.x = 0.0f;
420 if (clip_rect.y < 0.0f)
421 clip_rect.y = 0.0f;
422
423 // Apply scissor/clipping rectangle
424 VkRect2D scissor;
425 scissor.offset.x = (int32_t)(clip_rect.x);
426 scissor.offset.y = (int32_t)(clip_rect.y);
427 scissor.extent.width = (uint32_t)(clip_rect.z - clip_rect.x);
428 scissor.extent.height = (uint32_t)(clip_rect.w - clip_rect.y);
429 vkCmdSetScissor(command_buffer, 0, 1, &scissor);
430
431 // Draw
432 vkCmdDrawIndexed(command_buffer, pcmd->ElemCount, 1, pcmd->IdxOffset + global_idx_offset, pcmd->VtxOffset + global_vtx_offset, 0);
433 }
434 }
435 }
436 global_idx_offset += cmd_list->IdxBuffer.Size;
437 global_vtx_offset += cmd_list->VtxBuffer.Size;
438 }
439}
440
441bool ImGui_ImplVulkan_CreateFontsTexture(VkCommandBuffer command_buffer)
442{
443 ImGui_ImplVulkan_InitInfo* v = &g_VulkanInitInfo;
444 ImGuiIO& io = ImGui::GetIO();
445
446 unsigned char* pixels;
447 int width, height;
448 io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
449 size_t upload_size = width * height * 4 * sizeof(char);
450
451 VkResult err;
452
453 // Create the Image:
454 {
455 VkImageCreateInfo info = {};
456 info.sType = VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO;
457 info.imageType = VK_IMAGE_TYPE_2D;
458 info.format = VK_FORMAT_R8G8B8A8_UNORM;
459 info.extent.width = width;
460 info.extent.height = height;
461 info.extent.depth = 1;
462 info.mipLevels = 1;
463 info.arrayLayers = 1;
464 info.samples = VK_SAMPLE_COUNT_1_BIT;
465 info.tiling = VK_IMAGE_TILING_OPTIMAL;
466 info.usage = VK_IMAGE_USAGE_SAMPLED_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT;
467 info.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
468 info.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
469 err = vkCreateImage(v->Device, &info, v->Allocator, &g_FontImage);
470 check_vk_result(err);
471 VkMemoryRequirements req;
472 vkGetImageMemoryRequirements(v->Device, g_FontImage, &req);
473 VkMemoryAllocateInfo alloc_info = {};
474 alloc_info.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
475 alloc_info.allocationSize = req.size;
476 alloc_info.memoryTypeIndex = ImGui_ImplVulkan_MemoryType(VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, req.memoryTypeBits);
477 err = vkAllocateMemory(v->Device, &alloc_info, v->Allocator, &g_FontMemory);
478 check_vk_result(err);
479 err = vkBindImageMemory(v->Device, g_FontImage, g_FontMemory, 0);
480 check_vk_result(err);
481 }
482
483 // Create the Image View:
484 {
485 VkImageViewCreateInfo info = {};
486 info.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
487 info.image = g_FontImage;
488 info.viewType = VK_IMAGE_VIEW_TYPE_2D;
489 info.format = VK_FORMAT_R8G8B8A8_UNORM;
490 info.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
491 info.subresourceRange.levelCount = 1;
492 info.subresourceRange.layerCount = 1;
493 err = vkCreateImageView(v->Device, &info, v->Allocator, &g_FontView);
494 check_vk_result(err);
495 }
496
497 // Update the Descriptor Set:
498 {
499 VkDescriptorImageInfo desc_image[1] = {};
500 desc_image[0].sampler = g_FontSampler;
501 desc_image[0].imageView = g_FontView;
502 desc_image[0].imageLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
503 VkWriteDescriptorSet write_desc[1] = {};
504 write_desc[0].sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
505 write_desc[0].dstSet = g_DescriptorSet;
506 write_desc[0].descriptorCount = 1;
507 write_desc[0].descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
508 write_desc[0].pImageInfo = desc_image;
509 vkUpdateDescriptorSets(v->Device, 1, write_desc, 0, NULL);
510 }
511
512 // Create the Upload Buffer:
513 {
514 VkBufferCreateInfo buffer_info = {};
515 buffer_info.sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO;
516 buffer_info.size = upload_size;
517 buffer_info.usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT;
518 buffer_info.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
519 err = vkCreateBuffer(v->Device, &buffer_info, v->Allocator, &g_UploadBuffer);
520 check_vk_result(err);
521 VkMemoryRequirements req;
522 vkGetBufferMemoryRequirements(v->Device, g_UploadBuffer, &req);
523 g_BufferMemoryAlignment = (g_BufferMemoryAlignment > req.alignment) ? g_BufferMemoryAlignment : req.alignment;
524 VkMemoryAllocateInfo alloc_info = {};
525 alloc_info.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
526 alloc_info.allocationSize = req.size;
527 alloc_info.memoryTypeIndex = ImGui_ImplVulkan_MemoryType(VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT, req.memoryTypeBits);
528 err = vkAllocateMemory(v->Device, &alloc_info, v->Allocator, &g_UploadBufferMemory);
529 check_vk_result(err);
530 err = vkBindBufferMemory(v->Device, g_UploadBuffer, g_UploadBufferMemory, 0);
531 check_vk_result(err);
532 }
533
534 // Upload to Buffer:
535 {
536 char* map = NULL;
537 err = vkMapMemory(v->Device, g_UploadBufferMemory, 0, upload_size, 0, (void**)(&map));
538 check_vk_result(err);
539 memcpy(map, pixels, upload_size);
540 VkMappedMemoryRange range[1] = {};
541 range[0].sType = VK_STRUCTURE_TYPE_MAPPED_MEMORY_RANGE;
542 range[0].memory = g_UploadBufferMemory;
543 range[0].size = upload_size;
544 err = vkFlushMappedMemoryRanges(v->Device, 1, range);
545 check_vk_result(err);
546 vkUnmapMemory(v->Device, g_UploadBufferMemory);
547 }
548
549 // Copy to Image:
550 {
551 VkImageMemoryBarrier copy_barrier[1] = {};
552 copy_barrier[0].sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER;
553 copy_barrier[0].dstAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT;
554 copy_barrier[0].oldLayout = VK_IMAGE_LAYOUT_UNDEFINED;
555 copy_barrier[0].newLayout = VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL;
556 copy_barrier[0].srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
557 copy_barrier[0].dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
558 copy_barrier[0].image = g_FontImage;
559 copy_barrier[0].subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
560 copy_barrier[0].subresourceRange.levelCount = 1;
561 copy_barrier[0].subresourceRange.layerCount = 1;
562 vkCmdPipelineBarrier(command_buffer, VK_PIPELINE_STAGE_HOST_BIT, VK_PIPELINE_STAGE_TRANSFER_BIT, 0, 0, NULL, 0, NULL, 1, copy_barrier);
563
564 VkBufferImageCopy region = {};
565 region.imageSubresource.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
566 region.imageSubresource.layerCount = 1;
567 region.imageExtent.width = width;
568 region.imageExtent.height = height;
569 region.imageExtent.depth = 1;
570 vkCmdCopyBufferToImage(command_buffer, g_UploadBuffer, g_FontImage, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, 1, &region);
571
572 VkImageMemoryBarrier use_barrier[1] = {};
573 use_barrier[0].sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER;
574 use_barrier[0].srcAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT;
575 use_barrier[0].dstAccessMask = VK_ACCESS_SHADER_READ_BIT;
576 use_barrier[0].oldLayout = VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL;
577 use_barrier[0].newLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
578 use_barrier[0].srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
579 use_barrier[0].dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
580 use_barrier[0].image = g_FontImage;
581 use_barrier[0].subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
582 use_barrier[0].subresourceRange.levelCount = 1;
583 use_barrier[0].subresourceRange.layerCount = 1;
584 vkCmdPipelineBarrier(command_buffer, VK_PIPELINE_STAGE_TRANSFER_BIT, VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT, 0, 0, NULL, 0, NULL, 1, use_barrier);
585 }
586
587 // Store our identifier
588 io.Fonts->TexID = (ImTextureID)(intptr_t)g_FontImage;
589
590 return true;
591}
592
593static void ImGui_ImplVulkan_CreateShaderModules(VkDevice device, const VkAllocationCallbacks* allocator)
594{
595 // Create the shader modules
596 if (g_ShaderModuleVert == NULL)
597 {
598 VkShaderModuleCreateInfo vert_info = {};
599 vert_info.sType = VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO;
600 vert_info.codeSize = sizeof(__glsl_shader_vert_spv);
601 vert_info.pCode = (uint32_t*)__glsl_shader_vert_spv;
602 VkResult err = vkCreateShaderModule(device, &vert_info, allocator, &g_ShaderModuleVert);
603 check_vk_result(err);
604 }
605 if (g_ShaderModuleFrag == NULL)
606 {
607 VkShaderModuleCreateInfo frag_info = {};
608 frag_info.sType = VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO;
609 frag_info.codeSize = sizeof(__glsl_shader_frag_spv);
610 frag_info.pCode = (uint32_t*)__glsl_shader_frag_spv;
611 VkResult err = vkCreateShaderModule(device, &frag_info, allocator, &g_ShaderModuleFrag);
612 check_vk_result(err);
613 }
614}
615
616static void ImGui_ImplVulkan_CreateFontSampler(VkDevice device, const VkAllocationCallbacks* allocator)
617{
618 if (g_FontSampler)
619 return;
620
621 VkSamplerCreateInfo info = {};
622 info.sType = VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO;
623 info.magFilter = VK_FILTER_LINEAR;
624 info.minFilter = VK_FILTER_LINEAR;
625 info.mipmapMode = VK_SAMPLER_MIPMAP_MODE_LINEAR;
626 info.addressModeU = VK_SAMPLER_ADDRESS_MODE_REPEAT;
627 info.addressModeV = VK_SAMPLER_ADDRESS_MODE_REPEAT;
628 info.addressModeW = VK_SAMPLER_ADDRESS_MODE_REPEAT;
629 info.minLod = -1000;
630 info.maxLod = 1000;
631 info.maxAnisotropy = 1.0f;
632 VkResult err = vkCreateSampler(device, &info, allocator, &g_FontSampler);
633 check_vk_result(err);
634}
635
636static void ImGui_ImplVulkan_CreateDescriptorSetLayout(VkDevice device, const VkAllocationCallbacks* allocator)
637{
638 if (g_DescriptorSetLayout)
639 return;
640
641 ImGui_ImplVulkan_CreateFontSampler(device, allocator);
642 VkSampler sampler[1] = { g_FontSampler };
643 VkDescriptorSetLayoutBinding binding[1] = {};
644 binding[0].descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
645 binding[0].descriptorCount = 1;
646 binding[0].stageFlags = VK_SHADER_STAGE_FRAGMENT_BIT;
647 binding[0].pImmutableSamplers = sampler;
648 VkDescriptorSetLayoutCreateInfo info = {};
649 info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO;
650 info.bindingCount = 1;
651 info.pBindings = binding;
652 VkResult err = vkCreateDescriptorSetLayout(device, &info, allocator, &g_DescriptorSetLayout);
653 check_vk_result(err);
654}
655
656static void ImGui_ImplVulkan_CreatePipelineLayout(VkDevice device, const VkAllocationCallbacks* allocator)
657{
658 if (g_PipelineLayout)
659 return;
660
661 // Constants: we are using 'vec2 offset' and 'vec2 scale' instead of a full 3d projection matrix
662 ImGui_ImplVulkan_CreateDescriptorSetLayout(device, allocator);
663 VkPushConstantRange push_constants[1] = {};
664 push_constants[0].stageFlags = VK_SHADER_STAGE_VERTEX_BIT;
665 push_constants[0].offset = sizeof(float) * 0;
666 push_constants[0].size = sizeof(float) * 4;
667 VkDescriptorSetLayout set_layout[1] = { g_DescriptorSetLayout };
668 VkPipelineLayoutCreateInfo layout_info = {};
669 layout_info.sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO;
670 layout_info.setLayoutCount = 1;
671 layout_info.pSetLayouts = set_layout;
672 layout_info.pushConstantRangeCount = 1;
673 layout_info.pPushConstantRanges = push_constants;
674 VkResult err = vkCreatePipelineLayout(device, &layout_info, allocator, &g_PipelineLayout);
675 check_vk_result(err);
676}
677
678static void ImGui_ImplVulkan_CreatePipeline(VkDevice device, const VkAllocationCallbacks* allocator, VkPipelineCache pipelineCache, VkRenderPass renderPass, VkSampleCountFlagBits MSAASamples, VkPipeline* pipeline)
679{
680 ImGui_ImplVulkan_CreateShaderModules(device, allocator);
681
682 VkPipelineShaderStageCreateInfo stage[2] = {};
683 stage[0].sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO;
684 stage[0].stage = VK_SHADER_STAGE_VERTEX_BIT;
685 stage[0].module = g_ShaderModuleVert;
686 stage[0].pName = "main";
687 stage[1].sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO;
688 stage[1].stage = VK_SHADER_STAGE_FRAGMENT_BIT;
689 stage[1].module = g_ShaderModuleFrag;
690 stage[1].pName = "main";
691
692 VkVertexInputBindingDescription binding_desc[1] = {};
693 binding_desc[0].stride = sizeof(ImDrawVert);
694 binding_desc[0].inputRate = VK_VERTEX_INPUT_RATE_VERTEX;
695
696 VkVertexInputAttributeDescription attribute_desc[3] = {};
697 attribute_desc[0].location = 0;
698 attribute_desc[0].binding = binding_desc[0].binding;
699 attribute_desc[0].format = VK_FORMAT_R32G32_SFLOAT;
700 attribute_desc[0].offset = IM_OFFSETOF(ImDrawVert, pos);
701 attribute_desc[1].location = 1;
702 attribute_desc[1].binding = binding_desc[0].binding;
703 attribute_desc[1].format = VK_FORMAT_R32G32_SFLOAT;
704 attribute_desc[1].offset = IM_OFFSETOF(ImDrawVert, uv);
705 attribute_desc[2].location = 2;
706 attribute_desc[2].binding = binding_desc[0].binding;
707 attribute_desc[2].format = VK_FORMAT_R8G8B8A8_UNORM;
708 attribute_desc[2].offset = IM_OFFSETOF(ImDrawVert, col);
709
710 VkPipelineVertexInputStateCreateInfo vertex_info = {};
711 vertex_info.sType = VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO;
712 vertex_info.vertexBindingDescriptionCount = 1;
713 vertex_info.pVertexBindingDescriptions = binding_desc;
714 vertex_info.vertexAttributeDescriptionCount = 3;
715 vertex_info.pVertexAttributeDescriptions = attribute_desc;
716
717 VkPipelineInputAssemblyStateCreateInfo ia_info = {};
718 ia_info.sType = VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO;
719 ia_info.topology = VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST;
720
721 VkPipelineViewportStateCreateInfo viewport_info = {};
722 viewport_info.sType = VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO;
723 viewport_info.viewportCount = 1;
724 viewport_info.scissorCount = 1;
725
726 VkPipelineRasterizationStateCreateInfo raster_info = {};
727 raster_info.sType = VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO;
728 raster_info.polygonMode = VK_POLYGON_MODE_FILL;
729 raster_info.cullMode = VK_CULL_MODE_NONE;
730 raster_info.frontFace = VK_FRONT_FACE_COUNTER_CLOCKWISE;
731 raster_info.lineWidth = 1.0f;
732
733 VkPipelineMultisampleStateCreateInfo ms_info = {};
734 ms_info.sType = VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO;
735 ms_info.rasterizationSamples = (MSAASamples != 0) ? MSAASamples : VK_SAMPLE_COUNT_1_BIT;
736
737 VkPipelineColorBlendAttachmentState color_attachment[1] = {};
738 color_attachment[0].blendEnable = VK_TRUE;
739 color_attachment[0].srcColorBlendFactor = VK_BLEND_FACTOR_SRC_ALPHA;
740 color_attachment[0].dstColorBlendFactor = VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA;
741 color_attachment[0].colorBlendOp = VK_BLEND_OP_ADD;
742 color_attachment[0].srcAlphaBlendFactor = VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA;
743 color_attachment[0].dstAlphaBlendFactor = VK_BLEND_FACTOR_ZERO;
744 color_attachment[0].alphaBlendOp = VK_BLEND_OP_ADD;
745 color_attachment[0].colorWriteMask = VK_COLOR_COMPONENT_R_BIT | VK_COLOR_COMPONENT_G_BIT | VK_COLOR_COMPONENT_B_BIT | VK_COLOR_COMPONENT_A_BIT;
746
747 VkPipelineDepthStencilStateCreateInfo depth_info = {};
748 depth_info.sType = VK_STRUCTURE_TYPE_PIPELINE_DEPTH_STENCIL_STATE_CREATE_INFO;
749
750 VkPipelineColorBlendStateCreateInfo blend_info = {};
751 blend_info.sType = VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO;
752 blend_info.attachmentCount = 1;
753 blend_info.pAttachments = color_attachment;
754
755 VkDynamicState dynamic_states[2] = { VK_DYNAMIC_STATE_VIEWPORT, VK_DYNAMIC_STATE_SCISSOR };
756 VkPipelineDynamicStateCreateInfo dynamic_state = {};
757 dynamic_state.sType = VK_STRUCTURE_TYPE_PIPELINE_DYNAMIC_STATE_CREATE_INFO;
758 dynamic_state.dynamicStateCount = (uint32_t)IM_ARRAYSIZE(dynamic_states);
759 dynamic_state.pDynamicStates = dynamic_states;
760
761 ImGui_ImplVulkan_CreatePipelineLayout(device, allocator);
762
763 VkGraphicsPipelineCreateInfo info = {};
764 info.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO;
765 info.flags = g_PipelineCreateFlags;
766 info.stageCount = 2;
767 info.pStages = stage;
768 info.pVertexInputState = &vertex_info;
769 info.pInputAssemblyState = &ia_info;
770 info.pViewportState = &viewport_info;
771 info.pRasterizationState = &raster_info;
772 info.pMultisampleState = &ms_info;
773 info.pDepthStencilState = &depth_info;
774 info.pColorBlendState = &blend_info;
775 info.pDynamicState = &dynamic_state;
776 info.layout = g_PipelineLayout;
777 info.renderPass = renderPass;
778 VkResult err = vkCreateGraphicsPipelines(device, pipelineCache, 1, &info, allocator, pipeline);
779 check_vk_result(err);
780}
781
782bool ImGui_ImplVulkan_CreateDeviceObjects()
783{
784 ImGui_ImplVulkan_InitInfo* v = &g_VulkanInitInfo;
785 VkResult err;
786
787 if (!g_FontSampler)
788 {
789 VkSamplerCreateInfo info = {};
790 info.sType = VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO;
791 info.magFilter = VK_FILTER_LINEAR;
792 info.minFilter = VK_FILTER_LINEAR;
793 info.mipmapMode = VK_SAMPLER_MIPMAP_MODE_LINEAR;
794 info.addressModeU = VK_SAMPLER_ADDRESS_MODE_REPEAT;
795 info.addressModeV = VK_SAMPLER_ADDRESS_MODE_REPEAT;
796 info.addressModeW = VK_SAMPLER_ADDRESS_MODE_REPEAT;
797 info.minLod = -1000;
798 info.maxLod = 1000;
799 info.maxAnisotropy = 1.0f;
800 err = vkCreateSampler(v->Device, &info, v->Allocator, &g_FontSampler);
801 check_vk_result(err);
802 }
803
804 if (!g_DescriptorSetLayout)
805 {
806 VkSampler sampler[1] = {g_FontSampler};
807 VkDescriptorSetLayoutBinding binding[1] = {};
808 binding[0].descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
809 binding[0].descriptorCount = 1;
810 binding[0].stageFlags = VK_SHADER_STAGE_FRAGMENT_BIT;
811 binding[0].pImmutableSamplers = sampler;
812 VkDescriptorSetLayoutCreateInfo info = {};
813 info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO;
814 info.bindingCount = 1;
815 info.pBindings = binding;
816 err = vkCreateDescriptorSetLayout(v->Device, &info, v->Allocator, &g_DescriptorSetLayout);
817 check_vk_result(err);
818 }
819
820 // Create Descriptor Set:
821 {
822 VkDescriptorSetAllocateInfo alloc_info = {};
823 alloc_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO;
824 alloc_info.descriptorPool = v->DescriptorPool;
825 alloc_info.descriptorSetCount = 1;
826 alloc_info.pSetLayouts = &g_DescriptorSetLayout;
827 err = vkAllocateDescriptorSets(v->Device, &alloc_info, &g_DescriptorSet);
828 check_vk_result(err);
829 }
830
831 if (!g_PipelineLayout)
832 {
833 // Constants: we are using 'vec2 offset' and 'vec2 scale' instead of a full 3d projection matrix
834 VkPushConstantRange push_constants[1] = {};
835 push_constants[0].stageFlags = VK_SHADER_STAGE_VERTEX_BIT;
836 push_constants[0].offset = sizeof(float) * 0;
837 push_constants[0].size = sizeof(float) * 4;
838 VkDescriptorSetLayout set_layout[1] = { g_DescriptorSetLayout };
839 VkPipelineLayoutCreateInfo layout_info = {};
840 layout_info.sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO;
841 layout_info.setLayoutCount = 1;
842 layout_info.pSetLayouts = set_layout;
843 layout_info.pushConstantRangeCount = 1;
844 layout_info.pPushConstantRanges = push_constants;
845 err = vkCreatePipelineLayout(v->Device, &layout_info, v->Allocator, &g_PipelineLayout);
846 check_vk_result(err);
847 }
848
849 ImGui_ImplVulkan_CreatePipeline(v->Device, v->Allocator, v->PipelineCache, g_RenderPass, v->MSAASamples, &g_Pipeline);
850
851 return true;
852}
853
854void ImGui_ImplVulkan_DestroyFontUploadObjects()
855{
856 ImGui_ImplVulkan_InitInfo* v = &g_VulkanInitInfo;
857 if (g_UploadBuffer)
858 {
859 vkDestroyBuffer(v->Device, g_UploadBuffer, v->Allocator);
860 g_UploadBuffer = VK_NULL_HANDLE;
861 }
862 if (g_UploadBufferMemory)
863 {
864 vkFreeMemory(v->Device, g_UploadBufferMemory, v->Allocator);
865 g_UploadBufferMemory = VK_NULL_HANDLE;
866 }
867}
868
869void ImGui_ImplVulkan_DestroyDeviceObjects()
870{
871 ImGui_ImplVulkan_InitInfo* v = &g_VulkanInitInfo;
872 ImGui_ImplVulkanH_DestroyWindowRenderBuffers(v->Device, &g_MainWindowRenderBuffers, v->Allocator);
873 ImGui_ImplVulkan_DestroyFontUploadObjects();
874
875 if (g_ShaderModuleVert) { vkDestroyShaderModule(v->Device, g_ShaderModuleVert, v->Allocator); g_ShaderModuleVert = VK_NULL_HANDLE; }
876 if (g_ShaderModuleFrag) { vkDestroyShaderModule(v->Device, g_ShaderModuleFrag, v->Allocator); g_ShaderModuleFrag = VK_NULL_HANDLE; }
877 if (g_FontView) { vkDestroyImageView(v->Device, g_FontView, v->Allocator); g_FontView = VK_NULL_HANDLE; }
878 if (g_FontImage) { vkDestroyImage(v->Device, g_FontImage, v->Allocator); g_FontImage = VK_NULL_HANDLE; }
879 if (g_FontMemory) { vkFreeMemory(v->Device, g_FontMemory, v->Allocator); g_FontMemory = VK_NULL_HANDLE; }
880 if (g_FontSampler) { vkDestroySampler(v->Device, g_FontSampler, v->Allocator); g_FontSampler = VK_NULL_HANDLE; }
881 if (g_DescriptorSetLayout) { vkDestroyDescriptorSetLayout(v->Device, g_DescriptorSetLayout, v->Allocator); g_DescriptorSetLayout = VK_NULL_HANDLE; }
882 if (g_PipelineLayout) { vkDestroyPipelineLayout(v->Device, g_PipelineLayout, v->Allocator); g_PipelineLayout = VK_NULL_HANDLE; }
883 if (g_Pipeline) { vkDestroyPipeline(v->Device, g_Pipeline, v->Allocator); g_Pipeline = VK_NULL_HANDLE; }
884}
885
886bool ImGui_ImplVulkan_Init(ImGui_ImplVulkan_InitInfo* info, VkRenderPass render_pass)
887{
888 // Setup back-end capabilities flags
889 ImGuiIO& io = ImGui::GetIO();
890 io.BackendRendererName = "imgui_impl_vulkan";
891 io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset; // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
892
893 IM_ASSERT(info->Instance != VK_NULL_HANDLE);
894 IM_ASSERT(info->PhysicalDevice != VK_NULL_HANDLE);
895 IM_ASSERT(info->Device != VK_NULL_HANDLE);
896 IM_ASSERT(info->DescriptorPool != VK_NULL_HANDLE);
897 IM_ASSERT(info->MinImageCount >= 2);
898 IM_ASSERT(info->ImageCount >= info->MinImageCount);
899 IM_ASSERT(render_pass != VK_NULL_HANDLE);
900
901 g_VulkanInitInfo = *info;
902 g_RenderPass = render_pass;
903 ImGui_ImplVulkan_CreateDeviceObjects();
904
905 return true;
906}
907
908void ImGui_ImplVulkan_Shutdown()
909{
910 ImGui_ImplVulkan_DestroyDeviceObjects();
911}
912
913void ImGui_ImplVulkan_NewFrame()
914{
915}
916
917void ImGui_ImplVulkan_SetMinImageCount(uint32_t min_image_count)
918{
919 IM_ASSERT(min_image_count >= 2);
920 if (g_VulkanInitInfo.MinImageCount == min_image_count)
921 return;
922
923 ImGui_ImplVulkan_InitInfo* v = &g_VulkanInitInfo;
924 VkResult err = vkDeviceWaitIdle(v->Device);
925 check_vk_result(err);
926 ImGui_ImplVulkanH_DestroyWindowRenderBuffers(v->Device, &g_MainWindowRenderBuffers, v->Allocator);
927 g_VulkanInitInfo.MinImageCount = min_image_count;
928}
929
930
931//-------------------------------------------------------------------------
932// Internal / Miscellaneous Vulkan Helpers
933// (Used by example's main.cpp. Used by multi-viewport features. PROBABLY NOT used by your own app.)
934//-------------------------------------------------------------------------
935// You probably do NOT need to use or care about those functions.
936// Those functions only exist because:
937// 1) they facilitate the readability and maintenance of the multiple main.cpp examples files.
938// 2) the upcoming multi-viewport feature will need them internally.
939// Generally we avoid exposing any kind of superfluous high-level helpers in the bindings,
940// but it is too much code to duplicate everywhere so we exceptionally expose them.
941//
942// Your engine/app will likely _already_ have code to setup all that stuff (swap chain, render pass, frame buffers, etc.).
943// You may read this code to learn about Vulkan, but it is recommended you use you own custom tailored code to do equivalent work.
944// (The ImGui_ImplVulkanH_XXX functions do not interact with any of the state used by the regular ImGui_ImplVulkan_XXX functions)
945//-------------------------------------------------------------------------
946
947VkSurfaceFormatKHR ImGui_ImplVulkanH_SelectSurfaceFormat(VkPhysicalDevice physical_device, VkSurfaceKHR surface, const VkFormat* request_formats, int request_formats_count, VkColorSpaceKHR request_color_space)
948{
949 IM_ASSERT(request_formats != NULL);
950 IM_ASSERT(request_formats_count > 0);
951
952 // Per Spec Format and View Format are expected to be the same unless VK_IMAGE_CREATE_MUTABLE_BIT was set at image creation
953 // Assuming that the default behavior is without setting this bit, there is no need for separate Swapchain image and image view format
954 // Additionally several new color spaces were introduced with Vulkan Spec v1.0.40,
955 // hence we must make sure that a format with the mostly available color space, VK_COLOR_SPACE_SRGB_NONLINEAR_KHR, is found and used.
956 uint32_t avail_count;
957 vkGetPhysicalDeviceSurfaceFormatsKHR(physical_device, surface, &avail_count, NULL);
958 ImVector<VkSurfaceFormatKHR> avail_format;
959 avail_format.resize((int)avail_count);
960 vkGetPhysicalDeviceSurfaceFormatsKHR(physical_device, surface, &avail_count, avail_format.Data);
961
962 // First check if only one format, VK_FORMAT_UNDEFINED, is available, which would imply that any format is available
963 if (avail_count == 1)
964 {
965 if (avail_format[0].format == VK_FORMAT_UNDEFINED)
966 {
967 VkSurfaceFormatKHR ret;
968 ret.format = request_formats[0];
969 ret.colorSpace = request_color_space;
970 return ret;
971 }
972 else
973 {
974 // No point in searching another format
975 return avail_format[0];
976 }
977 }
978 else
979 {
980 // Request several formats, the first found will be used
981 for (int request_i = 0; request_i < request_formats_count; request_i++)
982 for (uint32_t avail_i = 0; avail_i < avail_count; avail_i++)
983 if (avail_format[avail_i].format == request_formats[request_i] && avail_format[avail_i].colorSpace == request_color_space)
984 return avail_format[avail_i];
985
986 // If none of the requested image formats could be found, use the first available
987 return avail_format[0];
988 }
989}
990
991VkPresentModeKHR ImGui_ImplVulkanH_SelectPresentMode(VkPhysicalDevice physical_device, VkSurfaceKHR surface, const VkPresentModeKHR* request_modes, int request_modes_count)
992{
993 IM_ASSERT(request_modes != NULL);
994 IM_ASSERT(request_modes_count > 0);
995
996 // Request a certain mode and confirm that it is available. If not use VK_PRESENT_MODE_FIFO_KHR which is mandatory
997 uint32_t avail_count = 0;
998 vkGetPhysicalDeviceSurfacePresentModesKHR(physical_device, surface, &avail_count, NULL);
999 ImVector<VkPresentModeKHR> avail_modes;
1000 avail_modes.resize((int)avail_count);
1001 vkGetPhysicalDeviceSurfacePresentModesKHR(physical_device, surface, &avail_count, avail_modes.Data);
1002 //for (uint32_t avail_i = 0; avail_i < avail_count; avail_i++)
1003 // printf("[vulkan] avail_modes[%d] = %d\n", avail_i, avail_modes[avail_i]);
1004
1005 for (int request_i = 0; request_i < request_modes_count; request_i++)
1006 for (uint32_t avail_i = 0; avail_i < avail_count; avail_i++)
1007 if (request_modes[request_i] == avail_modes[avail_i])
1008 return request_modes[request_i];
1009
1010 return VK_PRESENT_MODE_FIFO_KHR; // Always available
1011}
1012
1013void ImGui_ImplVulkanH_CreateWindowCommandBuffers(VkPhysicalDevice physical_device, VkDevice device, ImGui_ImplVulkanH_Window* wd, uint32_t queue_family, const VkAllocationCallbacks* allocator)
1014{
1015 IM_ASSERT(physical_device != VK_NULL_HANDLE && device != VK_NULL_HANDLE);
1016 (void)physical_device;
1017 (void)allocator;
1018
1019 // Create Command Buffers
1020 VkResult err;
1021 for (uint32_t i = 0; i < wd->ImageCount; i++)
1022 {
1023 ImGui_ImplVulkanH_Frame* fd = &wd->Frames[i];
1024 ImGui_ImplVulkanH_FrameSemaphores* fsd = &wd->FrameSemaphores[i];
1025 {
1026 VkCommandPoolCreateInfo info = {};
1027 info.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO;
1028 info.flags = VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT;
1029 info.queueFamilyIndex = queue_family;
1030 err = vkCreateCommandPool(device, &info, allocator, &fd->CommandPool);
1031 check_vk_result(err);
1032 }
1033 {
1034 VkCommandBufferAllocateInfo info = {};
1035 info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO;
1036 info.commandPool = fd->CommandPool;
1037 info.level = VK_COMMAND_BUFFER_LEVEL_PRIMARY;
1038 info.commandBufferCount = 1;
1039 err = vkAllocateCommandBuffers(device, &info, &fd->CommandBuffer);
1040 check_vk_result(err);
1041 }
1042 {
1043 VkFenceCreateInfo info = {};
1044 info.sType = VK_STRUCTURE_TYPE_FENCE_CREATE_INFO;
1045 info.flags = VK_FENCE_CREATE_SIGNALED_BIT;
1046 err = vkCreateFence(device, &info, allocator, &fd->Fence);
1047 check_vk_result(err);
1048 }
1049 {
1050 VkSemaphoreCreateInfo info = {};
1051 info.sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO;
1052 err = vkCreateSemaphore(device, &info, allocator, &fsd->ImageAcquiredSemaphore);
1053 check_vk_result(err);
1054 err = vkCreateSemaphore(device, &info, allocator, &fsd->RenderCompleteSemaphore);
1055 check_vk_result(err);
1056 }
1057 }
1058}
1059
1060int ImGui_ImplVulkanH_GetMinImageCountFromPresentMode(VkPresentModeKHR present_mode)
1061{
1062 if (present_mode == VK_PRESENT_MODE_MAILBOX_KHR)
1063 return 3;
1064 if (present_mode == VK_PRESENT_MODE_FIFO_KHR || present_mode == VK_PRESENT_MODE_FIFO_RELAXED_KHR)
1065 return 2;
1066 if (present_mode == VK_PRESENT_MODE_IMMEDIATE_KHR)
1067 return 1;
1068 IM_ASSERT(0);
1069 return 1;
1070}
1071
1072void ImGui_ImplVulkanH_DestroyWindow(VkInstance instance, VkDevice device, ImGui_ImplVulkanH_Window* wd, const VkAllocationCallbacks* allocator)
1073{
1074 vkDeviceWaitIdle(device); // FIXME: We could wait on the Queue if we had the queue in wd-> (otherwise VulkanH functions can't use globals)
1075 //vkQueueWaitIdle(g_Queue);
1076
1077 for (uint32_t i = 0; i < wd->ImageCount; i++)
1078 {
1079 ImGui_ImplVulkanH_DestroyFrame(device, &wd->Frames[i], allocator);
1080 ImGui_ImplVulkanH_DestroyFrameSemaphores(device, &wd->FrameSemaphores[i], allocator);
1081 }
1082 IM_FREE(wd->Frames);
1083 IM_FREE(wd->FrameSemaphores);
1084 wd->Frames = NULL;
1085 wd->FrameSemaphores = NULL;
1086 vkDestroyPipeline(device, wd->Pipeline, allocator);
1087 vkDestroyRenderPass(device, wd->RenderPass, allocator);
1088 vkDestroySwapchainKHR(device, wd->Swapchain, allocator);
1089 vkDestroySurfaceKHR(instance, wd->Surface, allocator);
1090
1091 *wd = ImGui_ImplVulkanH_Window();
1092}
1093
1094void ImGui_ImplVulkanH_DestroyFrame(VkDevice device, ImGui_ImplVulkanH_Frame* fd, const VkAllocationCallbacks* allocator)
1095{
1096 vkDestroyFence(device, fd->Fence, allocator);
1097 vkFreeCommandBuffers(device, fd->CommandPool, 1, &fd->CommandBuffer);
1098 vkDestroyCommandPool(device, fd->CommandPool, allocator);
1099 fd->Fence = VK_NULL_HANDLE;
1100 fd->CommandBuffer = VK_NULL_HANDLE;
1101 fd->CommandPool = VK_NULL_HANDLE;
1102
1103 vkDestroyImageView(device, fd->BackbufferView, allocator);
1104 vkDestroyFramebuffer(device, fd->Framebuffer, allocator);
1105}
1106
1107void ImGui_ImplVulkanH_DestroyFrameSemaphores(VkDevice device, ImGui_ImplVulkanH_FrameSemaphores* fsd, const VkAllocationCallbacks* allocator)
1108{
1109 vkDestroySemaphore(device, fsd->ImageAcquiredSemaphore, allocator);
1110 vkDestroySemaphore(device, fsd->RenderCompleteSemaphore, allocator);
1111 fsd->ImageAcquiredSemaphore = fsd->RenderCompleteSemaphore = VK_NULL_HANDLE;
1112}
1113
1114void ImGui_ImplVulkanH_DestroyFrameRenderBuffers(VkDevice device, ImGui_ImplVulkanH_FrameRenderBuffers* buffers, const VkAllocationCallbacks* allocator)
1115{
1116 if (buffers->VertexBuffer) { vkDestroyBuffer(device, buffers->VertexBuffer, allocator); buffers->VertexBuffer = VK_NULL_HANDLE; }
1117 if (buffers->VertexBufferMemory) { vkFreeMemory(device, buffers->VertexBufferMemory, allocator); buffers->VertexBufferMemory = VK_NULL_HANDLE; }
1118 if (buffers->IndexBuffer) { vkDestroyBuffer(device, buffers->IndexBuffer, allocator); buffers->IndexBuffer = VK_NULL_HANDLE; }
1119 if (buffers->IndexBufferMemory) { vkFreeMemory(device, buffers->IndexBufferMemory, allocator); buffers->IndexBufferMemory = VK_NULL_HANDLE; }
1120 buffers->VertexBufferSize = 0;
1121 buffers->IndexBufferSize = 0;
1122}
1123
1124void ImGui_ImplVulkanH_DestroyWindowRenderBuffers(VkDevice device, ImGui_ImplVulkanH_WindowRenderBuffers* buffers, const VkAllocationCallbacks* allocator)
1125{
1126 for (uint32_t n = 0; n < buffers->Count; n++)
1127 ImGui_ImplVulkanH_DestroyFrameRenderBuffers(device, &buffers->FrameRenderBuffers[n], allocator);
1128 IM_FREE(buffers->FrameRenderBuffers);
1129 buffers->FrameRenderBuffers = NULL;
1130 buffers->Index = 0;
1131 buffers->Count = 0;
1132}
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