Use texture sampler in HLSL

[DGriffin91]

When trying to sample a texture in hlsl I get an error from this:

screen-13/src/graph/resolver.rs

Line 810 in 71c1c05

_ => unimplemented!(),

With the enum vk::DescriptorType::Sampler

I'm setting the sampler for the fragment shader with: .image_sampler((0, 1), sampler)

struct FullscreenVertexOutput
{
    float4 position : SV_Position;
    [[vk::location(0)]]
    float2 uv : TEXCOORD0;
};

[[vk::binding(0, 0)]]
Texture2D screenTexture : register(t0);
[[vk::binding(1, 0)]]
SamplerState textureSampler : register(s0);
float4 main(FullscreenVertexOutput input)
    : SV_Target
{
    return screenTexture.Sample(textureSampler, input.uv);
}

This GLSL version using a combined sampler works as expected:

#version 450

layout(binding = 0) uniform sampler2D screenTexture;

layout(location = 0) in vec2 inUV;
layout(location = 0) out vec4 outColor;

void main() { outColor = texture(screenTexture, inUV); }

Are only combined sampler currently supported?
DXC appears to support [[vk::combinedImageSampler]], but shaderc does not: google/shaderc#1310

[attackgoat]

Thanks for the detailed issue description and links! I added support to examples/image_sampler.rs showing how to use combined and separate samplers for both GLSL and HLSL.

This was a feature I haven't needed myself and so it was unimplemented. There may be more things like that.