mirror of
https://github.com/MobileGL-Dev/MobileGL
synced 2026-11-15 22:13:24 +09:00
swung0x48
1e46a67091
- ResolveWireDepthStencil moved the resolved aspect through a tightly packed buffer and, for a vertical mirror, started one region per row at row * width * texelSize. A depth/stencil buffer->image copy needs every bufferOffset on a multiple of 4 (VUID-vkCmdCopyBufferToImage-dstImage-07978), so a stencil aspect (1-byte texel) whose width is not a multiple of 4, or a D16 aspect with an odd width, was illegal on every row after the first; scissor clipping produces such widths. - paddedWidth = width rounded up to 4 / texelSize texels; the buffer is paddedWidth * height * texelSize, both copies name it as bufferRowLength, and each row region starts at row * paddedWidth * texelSize. - The flipped-resolve case gains a stencil leg: stencil bands 11/99 in the multisample source, a 29x32 flipped STENCIL_BUFFER_BIT blit from (5,8) to (20,4), and every stencil value of the destination checked against the mirrored band or the untouched prime. - Red-once (split + spawn, under VK_LOADER_LAYERS_ENABLE=*khronos_validation): lavapipe does not enforce the VU and the stencil bytes came back right on the unpadded code, so the red is the validation layer: 10 x "pRegions[1].bufferOffset (29) must be a multiple 4 if using a depth/stencil format (VK_FORMAT_D24_UNORM_S8_UINT)" on each arm before, 0 validation errors of any kind after.