Fixed the valid Layer error and black screen issue in 23_descriptor_s…

[hu-qing-hua]

Issues & Fixes

1. Validation Error: Missing Descriptor Set Layout

Error:

validation layer: type { Validation } msg: vkCreateGraphicsPipelines(): pCreateInfos[0].pStages[0] SPIR-V (VK_SHADER_STAGE_VERTEX_BIT) uses descriptor [Set 0, Binding 0, variable "ubo"] but the binding was not declared in the VkPipelineLayoutCreateInfo::pSetLayouts[0].

Cause:
I think this is the validation layer telling you that the shader declared a UBO with set=0 (if not specified, it's the default), binding=0, but there's no layout with set 0 in the pipeline layout.

Fix:
I fixed the creation of pipelineLayoutInfo.

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2. The window was completely black.

Cause:
I found that the triangle composed of indices 0, 1, 2 was rotating counterclockwise on the screen, while you set the front side to clockwise, and the back side culling took effect, so this triangle was discarded.

Fix:
I modified the rasterizer's creation.

[hu-qing-hua]

Closing this PR — the issue is already resolved in #358.