CODEWITHSUNDEEP
vulkan
James Nguyen
James Nguyen

Reputation: 1171

How do I upload data into a compressed image?

I've recently tried using Block-Compressed image formats in Vulkan and found that when I switch up my code to use a compressed image format, I get a complete garbage image on render.

Using NVIDIA Nsight also shows the same image I see as well.

I uploading the data by copying the raw SRGB pixels to a staging buffer and initiate a vkCmdCopyBufferImage to the target image. I get this output if the VkImage and VkImageView are of the format: VK_FORMAT_R8G8B8A8_SRGB enter image description here

But when I changed the format to VK_FORMAT_BC7_SRGB_BLOCK. I get this image:enter image description here

I was wondering if I need to do any conversions before copying the data to the image or am I just handling compressed textures wrong

Pastebin for upload code: https://pastebin.com/yrmRrQGp

Upvotes: 1

Views: 184

Answers (1)

Nicol Bolas
Nicol Bolas

Reputation: 474116

If you want to use a compressed image format, you must provide image data that has been compressed in accord with that format. You cannot just change the image format and expect everything to work.

Upvotes: 3

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