Vulkano does not detect correct work group sizes #2745
Description
The following code adapted from the vulkano book works
mod cs {
vulkano_shaders::shader! {
ty: "compute",
src: r"
#version 460
layout(local_size_x = 1024, local_size_y = 1, local_size_z = 1) in;
layout(set = 0, binding = 0) buffer Data {
uint data[];
} buf;
void main() {
buf.data[gl_GlobalInvocationID.x] *= 12;
}
",
}
}However, the following code fails to compile
mod cs {
vulkano_shaders::shader! {
ty: "compute",
src: r"
#version 460
layout(local_size_x = 1, local_size_y = 1, local_size_z = 1024) in;
layout(set = 0, binding = 0) buffer Data {
uint data[];
} buf;
void main() {
buf.data[gl_GlobalInvocationID.z] *= 12;
}
",
}
}error: compilation error:
shader.glsl:4: error: 'local_size' : too large; see gl_MaxComputeWorkGroupSize
--> src/main.rs:6:14
|
6 | src: r"
| ______________^
7 | | #version 460
8 | |
9 | | layout(local_size_x = 1, local_size_y = 1, local_size_z = 1024) in;
... |
18 | | ",
| |_________^
From https://docs.vulkan.org/glsl/latest/chapters/builtins.html:
The following built-in constants are declared in all shaders. The actual values used are implementation-dependent, but must be at least the value shown.
const ivec3 gl_MaxComputeWorkGroupSize = { 1024, 1024, 64 };However, the local device reports the following
physical_device.properties().max_compute_work_group_size
[1024, 1024, 1024]
It seems that vulkano-shaders is not correctly detecting the max compute work group size of the physical device