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render/vulkan: align staging buffers for texture upload

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vkCmdCopyBufferToImage requires that the buffer offset be a multiple
of the texel block size, which for single plane uncompressed formats
is the same as the number of bytes per pixel. This commit adds an
alignment parameter to vulkan_get_stage_span which ensures that the
provided span (and the sequence of image copy operations derived which
use it) have this alignment.
This commit is contained in:
Manuel Stoeckl 2022-11-25 12:28:43 -05:00
parent f0375eed24
commit c02872e033
3 changed files with 10 additions and 4 deletions
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6
include/render/vulkan.h
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@ -231,9 +231,11 @@ bool vulkan_submit_stage_wait(struct wlr_vk_renderer *renderer);
// Suballocates a buffer span with the given size that can be mapped
// and used as staging buffer. The allocation is implicitly released when the
// stage cb has finished execution.
// stage cb has finished execution. The start of the span will be a multiple
// of the given alignment.
struct wlr_vk_buffer_span vulkan_get_stage_span(
struct wlr_vk_renderer *renderer, VkDeviceSize size);
struct wlr_vk_renderer *renderer, VkDeviceSize size,
VkDeviceSize alignment);
// Tries to allocate a texture descriptor set. Will additionally
// return the pool it was allocated from when successful (for freeing it later).