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Backends: Vulkan: Add override for the subpass to reference during VkPipeline creation. (#3579)

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This allows for binding the pipeline/sending draw commands
(via `ImGui_ImplVulkan_RenderDrawData`) against any subpass, rather than
being restricted to only the first subpass.

Without this, attempting to bind the pipeline against a subpass other than
the first one results in validation layer errors and, at worst, some drivers
failing if the subpass attachments differ.
This commit is contained in:
Brandon DeRosier 2020-11-07 07:32:48 -08:00 committed by ocornut
parent 61825c7735
commit 6a0e85c561
3 changed files with 10 additions and 3 deletions
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11
backends/imgui_impl_vulkan.cpp
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@ -22,6 +22,7 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2020-11-11: Vulkan: Added support for specifying which subpass to reference during VkPipeline creation.
// 2020-09-07: Vulkan: Added VkPipeline parameter to ImGui_ImplVulkan_RenderDrawData (default to one passed to ImGui_ImplVulkan_Init).
// 2020-05-04: Vulkan: Fixed crash if initial frame has no vertices.
// 2020-04-26: Vulkan: Fixed edge case where render callbacks wouldn't be called if the ImDrawData didn't have vertices.
@ -81,6 +82,7 @@ static VkDescriptorSetLayout g_DescriptorSetLayout = VK_NULL_HANDLE;
static VkPipelineLayout g_PipelineLayout = VK_NULL_HANDLE;
static VkDescriptorSet g_DescriptorSet = VK_NULL_HANDLE;
static VkPipeline g_Pipeline = VK_NULL_HANDLE;
static uint32_t g_Subpass = 0;
static VkShaderModule g_ShaderModuleVert;
static VkShaderModule g_ShaderModuleFrag;
@ -675,7 +677,7 @@ static void ImGui_ImplVulkan_CreatePipelineLayout(VkDevice device, const VkAlloc
check_vk_result(err);
}
static void ImGui_ImplVulkan_CreatePipeline(VkDevice device, const VkAllocationCallbacks* allocator, VkPipelineCache pipelineCache, VkRenderPass renderPass, VkSampleCountFlagBits MSAASamples, VkPipeline* pipeline)
static void ImGui_ImplVulkan_CreatePipeline(VkDevice device, const VkAllocationCallbacks* allocator, VkPipelineCache pipelineCache, VkRenderPass renderPass, VkSampleCountFlagBits MSAASamples, VkPipeline* pipeline, uint32_t subpass)
{
ImGui_ImplVulkan_CreateShaderModules(device, allocator);
@ -775,6 +777,7 @@ static void ImGui_ImplVulkan_CreatePipeline(VkDevice device, const VkAllocationC
info.pDynamicState = &dynamic_state;
info.layout = g_PipelineLayout;
info.renderPass = renderPass;
info.subpass = subpass;
VkResult err = vkCreateGraphicsPipelines(device, pipelineCache, 1, &info, allocator, pipeline);
check_vk_result(err);
}
@ -846,7 +849,7 @@ bool ImGui_ImplVulkan_CreateDeviceObjects()
check_vk_result(err);
}
ImGui_ImplVulkan_CreatePipeline(v->Device, v->Allocator, v->PipelineCache, g_RenderPass, v->MSAASamples, &g_Pipeline);
ImGui_ImplVulkan_CreatePipeline(v->Device, v->Allocator, v->PipelineCache, g_RenderPass, v->MSAASamples, &g_Pipeline, g_Subpass);
return true;
}
@ -901,6 +904,8 @@ bool ImGui_ImplVulkan_Init(ImGui_ImplVulkan_InitInfo* info, VkRenderPass rend
g_VulkanInitInfo = *info;
g_RenderPass = render_pass;
g_Subpass = info->Subpass;
ImGui_ImplVulkan_CreateDeviceObjects();
return true;
@ -1193,7 +1198,7 @@ void ImGui_ImplVulkanH_CreateWindowSwapChain(VkPhysicalDevice physical_device, V
// We do not create a pipeline by default as this is also used by examples' main.cpp,
// but secondary viewport in multi-viewport mode may want to create one with:
//ImGui_ImplVulkan_CreatePipeline(device, allocator, VK_NULL_HANDLE, wd->RenderPass, VK_SAMPLE_COUNT_1_BIT, &wd->Pipeline);
//ImGui_ImplVulkan_CreatePipeline(device, allocator, VK_NULL_HANDLE, wd->RenderPass, VK_SAMPLE_COUNT_1_BIT, &wd->Pipeline, g_Subpass);
}
// Create The Image Views

1
backends/imgui_impl_vulkan.h
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@ -35,6 +35,7 @@ struct ImGui_ImplVulkan_InitInfo
VkQueue Queue;
VkPipelineCache PipelineCache;
VkDescriptorPool DescriptorPool;
uint32_t Subpass;
uint32_t MinImageCount; // >= 2
uint32_t ImageCount; // >= MinImageCount
VkSampleCountFlagBits MSAASamples; // >= VK_SAMPLE_COUNT_1_BIT

1
docs/CHANGELOG.txt
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@ -74,6 +74,7 @@ Other Changes:
- Backends: OpenGL3: Use glGetString(GL_VERSION) query instead of glGetIntegerv(GL_MAJOR_VERSION, ...)
when the later returns zero (e.g. Desktop GL 2.x). (#3530) [@xndcn]
- Backends: OpenGL3: Backup and restore GL_PRIMITIVE_RESTART state. (#3544) [@Xipiryon]
- Backends: Vulkan: Added support for specifying which subpass to reference during VkPipeline creation. (@3579) [@bdero]
- Backends: OSX: Fix keypad-enter key not working on MacOS. (#3554) [@rokups, @lfnoise]
- Examples: Apple+Metal: Consolidated/simplified to get closer to other examples. (#3543) [@warrenm]
- Docs: Split examples/README.txt into docs/BACKENDS.md and docs/EXAMPLES.md improved them.