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Add test and documentation for resource aliasing (overlap).

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This commit is contained in:
Adam Sawicki 2020-08-18 16:43:44 +02:00
parent 0ef61c2fd5
commit 0620c8e5e1
55 changed files with 16556 additions and 16197 deletions
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82
src/Tests.cpp
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@ -5087,6 +5087,87 @@ static void TestBudget()
}
}
static void TestAliasing()
{
wprintf(L"Testing aliasing...\n");
/*
This is just a simple test, more like a code sample to demonstrate it's possible.
*/
// A 512x512 texture to be sampled.
VkImageCreateInfo img1CreateInfo = { VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO };
img1CreateInfo.imageType = VK_IMAGE_TYPE_2D;
img1CreateInfo.extent.width = 512;
img1CreateInfo.extent.height = 512;
img1CreateInfo.extent.depth = 1;
img1CreateInfo.mipLevels = 10;
img1CreateInfo.arrayLayers = 1;
img1CreateInfo.format = VK_FORMAT_R8G8B8A8_SRGB;
img1CreateInfo.tiling = VK_IMAGE_TILING_OPTIMAL;
img1CreateInfo.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
img1CreateInfo.usage = VK_IMAGE_USAGE_TRANSFER_DST_BIT | VK_IMAGE_USAGE_SAMPLED_BIT;
img1CreateInfo.samples = VK_SAMPLE_COUNT_1_BIT;
// A full screen texture to be used as color attachment.
VkImageCreateInfo img2CreateInfo = { VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO };
img2CreateInfo.imageType = VK_IMAGE_TYPE_2D;
img2CreateInfo.extent.width = 1920;
img2CreateInfo.extent.height = 1080;
img2CreateInfo.extent.depth = 1;
img2CreateInfo.mipLevels = 1;
img2CreateInfo.arrayLayers = 1;
img2CreateInfo.format = VK_FORMAT_R8G8B8A8_UNORM;
img2CreateInfo.tiling = VK_IMAGE_TILING_OPTIMAL;
img2CreateInfo.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
img2CreateInfo.usage = VK_IMAGE_USAGE_SAMPLED_BIT | VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
img2CreateInfo.samples = VK_SAMPLE_COUNT_1_BIT;
VkImage img1 = VK_NULL_HANDLE;
ERR_GUARD_VULKAN(vkCreateImage(g_hDevice, &img1CreateInfo, g_Allocs, &img1));
VkImage img2 = VK_NULL_HANDLE;
ERR_GUARD_VULKAN(vkCreateImage(g_hDevice, &img2CreateInfo, g_Allocs, &img2));
VkMemoryRequirements img1MemReq = {};
vkGetImageMemoryRequirements(g_hDevice, img1, &img1MemReq);
VkMemoryRequirements img2MemReq = {};
vkGetImageMemoryRequirements(g_hDevice, img2, &img2MemReq);
VkMemoryRequirements finalMemReq = {};
finalMemReq.size = std::max(img1MemReq.size, img2MemReq.size);
finalMemReq.alignment = std::max(img1MemReq.alignment, img2MemReq.alignment);
finalMemReq.memoryTypeBits = img1MemReq.memoryTypeBits & img2MemReq.memoryTypeBits;
if(finalMemReq.memoryTypeBits != 0)
{
wprintf(L" size: max(%llu, %llu) = %llu\n",
img1MemReq.size, img2MemReq.size, finalMemReq.size);
wprintf(L" alignment: max(%llu, %llu) = %llu\n",
img1MemReq.alignment, img2MemReq.alignment, finalMemReq.alignment);
wprintf(L" memoryTypeBits: %u & %u = %u\n",
img1MemReq.memoryTypeBits, img2MemReq.memoryTypeBits, finalMemReq.memoryTypeBits);
VmaAllocationCreateInfo allocCreateInfo = {};
allocCreateInfo.usage = VMA_MEMORY_USAGE_GPU_ONLY;
VmaAllocation alloc = VK_NULL_HANDLE;
ERR_GUARD_VULKAN(vmaAllocateMemory(g_hAllocator, &finalMemReq, &allocCreateInfo, &alloc, nullptr));
ERR_GUARD_VULKAN(vmaBindImageMemory(g_hAllocator, alloc, img1));
ERR_GUARD_VULKAN(vmaBindImageMemory(g_hAllocator, alloc, img2));
// You can use img1, img2 here, but not at the same time!
vmaFreeMemory(g_hAllocator, alloc);
}
else
{
wprintf(L" Textures cannot alias!\n");
}
vkDestroyImage(g_hDevice, img2, g_Allocs);
vkDestroyImage(g_hDevice, img1, g_Allocs);
}
static void TestMapping()
{
wprintf(L"Testing mapping...\n");
@ -6335,6 +6416,7 @@ void Test()
TestMemoryUsage();
TestDeviceCoherentMemory();
TestBudget();
TestAliasing();
TestMapping();
TestDeviceLocalMapped();
TestMappingMultithreaded();