fix: windows supportHEADmain

1 files changed, 4 insertions, 1 deletions

diff --git a/src/platform/vulkan/vulkan_resources.cpp b/src/platform/vulkan/vulkan_resources.cpp
index ee2091b..05cb1be 100644
--- a/src/platform/vulkan/vulkan_resources.cpp
+++ b/src/platform/vulkan/vulkan_resources.cpp
@@ -77,7 +77,10 @@ namespace Donut::RHI
         VkImageCreateInfo ici{ VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO };
         ici.imageType = VK_IMAGE_TYPE_2D; ici.format = cfmt; ici.extent = { (uint32_t)w, (uint32_t)h, 1 };
         ici.mipLevels = 1; ici.arrayLayers = 1; ici.samples = VK_SAMPLE_COUNT_1_BIT;
-        ici.tiling = VK_IMAGE_TILING_OPTIMAL; ici.usage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT | VK_IMAGE_USAGE_SAMPLED_BIT;
+        // TRANSFER_SRC because export reads targets back with a copy. MoltenVK never
+        // minded it missing; a desktop driver is within its rights to hand back garbage.
+        ici.tiling = VK_IMAGE_TILING_OPTIMAL;
+        ici.usage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT | VK_IMAGE_USAGE_SAMPLED_BIT | VK_IMAGE_USAGE_TRANSFER_SRC_BIT;
         vkCreateImage(m_device, &ici, nullptr, &rt->m_image);
         VkMemoryRequirements req{}; vkGetImageMemoryRequirements(m_device, rt->m_image, &req);
         VkMemoryAllocateInfo ai{ VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO };