webgpu_map_buffer

Maps size bytes of buffer at offset for reading (.Read) or writing (.Write) and waits until they are mapped. wgpuBufferGetConstMappedRange or wgpuBufferGetMappedRange then give the bytes, and wgpuBufferUnmap ends the mapping. Returns false, and logs why, when mapping failed.

instance := wgpuCreateInstance(null);
buffer: WGPUBuffer;
if webgpu_map_buffer(instance, buffer, .Read) {
    bytes := wgpuBufferGetConstMappedRange(buffer, 0, 64);
    // ... read from bytes ...
    wgpuBufferUnmap(buffer);
}

webgpu_map_buffer :: (
    instance: WGPUInstance,
    buffer: WGPUBuffer,
    mode: WGPUMapMode,
    offset: u64 = 0,
    size: u64 = WGPU_WHOLE_MAP_SIZE
) -> bool