acowley/wgpu-image-read

Two Approaches to Initializing a Texture with wgpu

Usage:

RUST_LOG=image_read=info cargo run images/input-file.jpeg

The test program loads an image file and copies its contents to a wgpu::Texture two different ways, and then reads back the texture data to see if it survived the round trip.

On Linux with an AMD GPU and wgpu’s Vulkan backend, the round trip fails if I create a wgpu::Buffer initialized with the image data, then copy that to a texture with wgpu::CommandEncoder::copy_buffer_to_texture. The round trip succeeds if I only create the texture and use wgpu::Queue::write_texture to initialize it.