vsgskybox fails with vsg v1.1.13

[rainergericke]

My System: MacOS 26.2
VulkanSceneGraph version = 1.1.13, so = 15
vsgXchange version = 1.1.9, so = 2

vsgskybox does not run anymore, while it did with vsg v 1.1.11:

vsgskybox --skybox textures/skybox.dds models/teapot.vsgt
_mtlValidateArgumentsForTextureViewOnDevice:1866: failed assertion `Texture Creation
newSliceRange.length(1) must be a multiple of (6).'

What may be the reason?

[robertosfield]

I don't get the above failed assertion, but I don't see the skybox and when I add -d I get errors reported in the form:

vsgskybox --skybox textures/skybox.dds models/teapot.vsgt -d

....

    Objects: 2
        [0] 0x5fed4d4044e0, type: 6, name: NULL
        [1] 0x95a125000000001a, type: 10, name: NULL
UNASSIGNED-CoreValidation-DrawState-InvalidImageLayout(ERROR / SPEC): msgNum: 1303270965 - Validation Error: [ UNASSIGNED-CoreValidation-DrawState-InvalidImageLayout ] Object 0: handle = 0x5fed4d4044e0, type = VK_OBJECT_TYPE_COMMAND_BUFFER; Object 1: handle = 0x95a125000000001a, type = VK_OBJECT_TYPE_IMAGE; | MessageID = 0x4dae5635 | vkQueueSubmit(): pSubmits[0].pCommandBuffers[0] command buffer VkCommandBuffer 0x5fed4d4044e0[] expects VkImage 0x95a125000000001a[] (subresource: aspectMask 0x1 array layer 0, mip level 9) to be in layout VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL--instead, current layout is VK_IMAGE_LAYOUT_UNDEFINED.
    Objects: 2

I am deep into another topic right now so can't investigate but my best guess would be that the changes to mipmapping has caused this regression. I don't where the issue might lie, could be when parsing the dds file, through to how the image is setup and data copied.

Once I've completed my current task I will have a look.

[rainergericke]

That's ok. Just for information (MacOS):

vsgskybox --skybox textures/skybox.dds models/teapot.vsgt -d
Validation Error: [ VUID-VkImageCreateInfo-flags-08866 ] | MessageID = 0x22390023
vkCreateImage(): pCreateInfo->flags includes VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT but arrayLayers (1) is less than 6.
The Vulkan spec states: If flags contains VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT, arrayLayers must be greater than or equal to 6 (https://vulkan.lunarg.com/doc/view/1.4.335.1/mac/antora/spec/latest/chapters/resources.html#VUID-VkImageCreateInfo-flags-08866)

_Validation Error: [ VUID-VkImageViewCreateInfo-viewType-02960 ] | MessageID = 0xfcc34056
vkCreateImageView(): pCreateInfo->subresourceRange.layerCount (1) must be 6 or VK_REMAINING_ARRAY_LAYERS.
The Vulkan spec states: If viewType is VK_IMAGE_VIEW_TYPE_CUBE and subresourceRange.layerCount is not VK_REMAINING_ARRAY_LAYERS, subresourceRange.layerCount must be 6 (https://vulkan.lunarg.com/doc/view/1.4.335.1/mac/antora/spec/latest/chapters/resources.html#VUID-VkImageViewCreateInfo-viewType-02960)
Objects: 1
[0] VkImage 0x1b000000001b

mtlValidateArgumentsForTextureViewOnDevice:1866: failed assertion `Texture Creation
newSliceRange.length(1) must be a multiple of (6).

and:

vsgskybox --skybox textures/skybox.ktx models/teapot.vsgt -d

_Validation Error: [ VUID-VkImageCreateInfo-flags-08866 ] | MessageID = 0x22390023
vkCreateImage(): pCreateInfo->flags includes VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT but arrayLayers (1) is less than 6.
The Vulkan spec states: If flags contains VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT, arrayLayers must be greater than or equal to 6 (https://vulkan.lunarg.com/doc/view/1.4.335.1/mac/antora/spec/latest/chapters/resources.html#VUID-VkImageCreateInfo-flags-08866)

Validation Error: [ VUID-VkImageViewCreateInfo-viewType-02960 ] | MessageID = 0xfcc34056
vkCreateImageView(): pCreateInfo->subresourceRange.layerCount (1) must be 6 or VK_REMAINING_ARRAY_LAYERS.
The Vulkan spec states: If viewType is VK_IMAGE_VIEW_TYPE_CUBE and subresourceRange.layerCount is not VK_REMAINING_ARRAY_LAYERS, subresourceRange.layerCount must be 6 (https://vulkan.lunarg.com/doc/view/1.4.335.1/mac/antora/spec/latest/chapters/resources.html#VUID-VkImageViewCreateInfo-viewType-02960)
Objects: 1
[0] VkImage 0x1b000000001b

mtlValidateArgumentsForTextureViewOnDevice:1866: failed assertion `Texture Creation
newSliceRange.length(1) must be a multiple of (6).'

So dds and ktx cubemap textures lead to the same error.

[robertosfield]

I have begun investigating and found that vsgskybox stopped working at some point after the VulkanSceneGraph-v1.1.11 made back in August.

Tomorrow I'll use git bisect to figure out when the regression was introduced.

[robertosfield]

I have tracked the cause of the problems and merged fixes with VSG master with PR: vsg-dev/VulkanSceneGraph#1666

I also changed the Data::pixelExtents() methods return type as part of this work which required vsgExamples to be updated in one place so this build fix is checked with PR: #385

[rainergericke]

Yes, it works now - thanks!