mirror of
https://github.com/gfx-rs/wgpu.git
synced 2026-04-22 03:02:01 -04:00
da81673f64
567: Notes on LoadOp r=kvark a=PENGUINLIONG
If the swapchain image was drawn with a pipeline that loads a render target that has not been cleared before, the validation layer gives a triplet of confusing feedbacks:
```log
[2020-09-15T06:42:23Z ERROR gfx_backend_vulkan]
VALIDATION [UNASSIGNED-CoreValidation-DrawState-InvalidImageLayout (1303270965)] : Validation Error: [ UNASSIGNED-CoreValidation-DrawState-InvalidImageLayout ] Object 0: handle = 0x1d80787bfe8, type = VK_OBJECT_TYPE_COMMAND_BUFFER; | MessageID = 0x4dae5635 | Submitted command buffer expects VkImage 0x6dc7200000000005[] (subresource: aspectMask 0x1 array layer 0, mip level 0) to be in layout VK_IMAGE_LAYOUT_PRESENT_SRC_KHR--instead, current layout is VK_IMAGE_LAYOUT_UNDEFINED.
object info: (type: COMMAND_BUFFER, hndl: 2027350900712)
[2020-09-15T06:42:23Z ERROR gfx_backend_vulkan]
VALIDATION [UNASSIGNED-CoreValidation-DrawState-InvalidImageLayout (1303270965)] : Validation Error: [ UNASSIGNED-CoreValidation-DrawState-InvalidImageLayout ] Object 0: handle = 0x1d8078586a8, type = VK_OBJECT_TYPE_COMMAND_BUFFER; | MessageID = 0x4dae5635 | Submitted command buffer expects VkImage 0x3ba5830000000006[] (subresource: aspectMask 0x1 array layer 0, mip level 0) to be in layout VK_IMAGE_LAYOUT_PRESENT_SRC_KHR--instead, current layout is VK_IMAGE_LAYOUT_UNDEFINED.
object info: (type: COMMAND_BUFFER, hndl: 2027350754984)
[2020-09-15T06:42:23Z ERROR gfx_backend_vulkan]
VALIDATION [UNASSIGNED-CoreValidation-DrawState-InvalidImageLayout (1303270965)] : Validation Error: [ UNASSIGNED-CoreValidation-DrawState-InvalidImageLayout ] Object 0: handle = 0x1d8078614f8, type = VK_OBJECT_TYPE_COMMAND_BUFFER; | MessageID = 0x4dae5635 | Submitted command buffer expects VkImage 0x4c5b620000000007[] (subresource: aspectMask 0x1 array layer 0, mip level 0) to be in layout VK_IMAGE_LAYOUT_PRESENT_SRC_KHR--instead, current layout is VK_IMAGE_LAYOUT_UNDEFINED.
object info: (type: COMMAND_BUFFER, hndl: 2027350791416)
```
And it turns out they come from the triple-buffering swapchain images. It seems `wgpu` would only re-layout the swapchain image if it's been loaded by a clear op. I would be great to warn the users beforehand. (I know it's not something I should ever do tho)
Co-authored-by: PENGUINLIONG <admin@penguinliong.moe>