71 lines
1.8 KiB
HLSL
71 lines
1.8 KiB
HLSL
#include "sh/common.hlsl"
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/* ========================== *
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* Root signature
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* ========================== */
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#define ROOTSIG \
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"RootConstants(num32BitConstants=18, b0), " \
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"DescriptorTable(SRV(t0, numDescriptors = unbounded, flags = DESCRIPTORS_VOLATILE)), " \
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"StaticSampler(s0, " \
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"filter = FILTER_MIN_MAG_MIP_POINT, " \
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"addressU = TEXTURE_ADDRESS_CLAMP, " \
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"addressV = TEXTURE_ADDRESS_CLAMP, " \
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"addressW = TEXTURE_ADDRESS_CLAMP, " \
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"maxAnisotropy = 1)"
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ConstantBuffer<struct sh_blit_constants> g_constants : register(b0);
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Texture2D g_textures[] : register(t0);
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SamplerState g_sampler : register(s0);
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/* ========================== *
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* Vertex shader
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* ========================== */
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struct vs_input {
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DECL(uint, SV_VertexID);
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};
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struct vs_output {
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DECL(float4, SV_Position);
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DECL(float2, uv);
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};
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SH_ENTRY(ROOTSIG) struct vs_output vs(struct vs_input input)
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{
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static const float2 unit_quad_verts[4] = {
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float2(-0.5f, -0.5f),
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float2(0.5f, -0.5f),
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float2(0.5f, 0.5f),
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float2(-0.5f, 0.5f)
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};
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float2 vert = unit_quad_verts[input.SV_VertexID];
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struct vs_output output;
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output.SV_Position = mul(g_constants.projection, float4(vert, 0, 1));
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output.uv = vert + 0.5;
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return output;
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}
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/* ========================== *
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* Pixel shader
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* ========================== */
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struct ps_input {
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struct vs_output vs;
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};
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struct ps_output {
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DECL(float4, SV_Target);
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};
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SH_ENTRY(ROOTSIG) struct ps_output ps(struct ps_input input)
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{
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struct ps_output output;
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const float gamma = g_constants.gamma;
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output.SV_Target = pow(g_textures[g_constants.tex_urid].Sample(g_sampler, input.vs.uv), 1/gamma);
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return output;
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}
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