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Backends: Vulkan: Fix mapped memory validation error when buffer sizes are not multiple of VkPhysicalDeviceLimits::nonCoherentAtomSize. (#3957)

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If using Vulkan backend and either vertex_size or index_size is not aligned to VkPhysicalDeviceLimits::nonCoherentAtomSize, then the call to vkFlushMappedMemoryRanges in ImGui_ImplVulkan_RenderDrawData will result to validation error.
This commit is contained in:
John Asper
2021-03-21 12:29:24 -04:00
committed by ocornut
parent 59da01901e
commit 6d3a980f38
2 changed files with 6 additions and 3 deletions
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7
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)
// 2021-03-22: Vulkan: Fix mapped memory validation error when buffer sizes are not multiple of VkPhysicalDeviceLimits::nonCoherentAtomSize.
// 2021-02-18: Vulkan: Change blending equation to preserve alpha in output buffer.
// 2021-01-27: Vulkan: Added support for custom function load and IMGUI_IMPL_VULKAN_NO_PROTOTYPES by using ImGui_ImplVulkan_LoadFunctions().
// 2020-11-11: Vulkan: Added support for specifying which subpass to reference during VkPipeline creation.
@ -343,7 +344,7 @@ static void CreateOrResizeBuffer(VkBuffer& buffer, VkDeviceMemory& buffer_memory
err = vkBindBufferMemory(v->Device, buffer, buffer_memory, 0);
check_vk_result(err);
p_buffer_size = new_size;
p_buffer_size = req.size;
}
static void ImGui_ImplVulkan_SetupRenderState(ImDrawData* draw_data, VkPipeline pipeline, VkCommandBuffer command_buffer, ImGui_ImplVulkanH_FrameRenderBuffers* rb, int fb_width, int fb_height)
@ -429,9 +430,9 @@ void ImGui_ImplVulkan_RenderDrawData(ImDrawData* draw_data, VkCommandBuffer comm
// Upload vertex/index data into a single contiguous GPU buffer
ImDrawVert* vtx_dst = NULL;
ImDrawIdx* idx_dst = NULL;
VkResult err = vkMapMemory(v->Device, rb->VertexBufferMemory, 0, vertex_size, 0, (void**)(&vtx_dst));
VkResult err = vkMapMemory(v->Device, rb->VertexBufferMemory, 0, rb->VertexBufferSize, 0, (void**)(&vtx_dst));
check_vk_result(err);
err = vkMapMemory(v->Device, rb->IndexBufferMemory, 0, index_size, 0, (void**)(&idx_dst));
err = vkMapMemory(v->Device, rb->IndexBufferMemory, 0, rb->IndexBufferSize, 0, (void**)(&idx_dst));
check_vk_result(err);
for (int n = 0; n < draw_data->CmdListsCount; n++)
{