73 lines
1.7 KiB
HLSL
73 lines
1.7 KiB
HLSL
[[vk::binding(0, 0)]] SamplerState ClosestSampler;
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[[vk::binding(1, 0)]] Texture2D Texture[];
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struct PushConstant {
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float DissolveLerp;
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float TextLerp;
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float Width;
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float Height;
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};
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[[vk::push_constant]] PushConstant PushConstant;
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struct VSInput
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{
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float2 Position : POSITION0;
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float2 Texture : TEXCOORD0;
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};
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struct VSOutput
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{
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float4 Position : SV_POSITION;
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float2 Texture : NORMAL0;
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float DissolveLerp : DissolveLerp;
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float TextLerp : TextLerp;
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};
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float4 mix(float4 x, float4 y, float a)
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{
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return x * (1 - a) + y * a;
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}
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[shader("vertex")]
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VSOutput VSMain(VSInput input)
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{
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VSOutput output = (VSOutput)0;
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float2 canonicalSize = float2(1280, 720);
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float2 size = float2(PushConstant.Width, PushConstant.Height);
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int scaleFactor = 1;
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while (canonicalSize.x * (scaleFactor + 1) <= size.x && canonicalSize.y * (scaleFactor + 1) <= size.y) {
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scaleFactor += 1;
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}
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float2 inverseSize = 1.0 / size;
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float2 scale = canonicalSize * scaleFactor * inverseSize;
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output.Position = float4(input.Position * scale, 0, 1);
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output.Texture = input.Texture;
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output.DissolveLerp = PushConstant.DissolveLerp;
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output.TextLerp = PushConstant.TextLerp;
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return output;
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}
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[shader("pixel")]
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float4 PSMain(VSOutput input) : SV_TARGET
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{
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float4 color0 = Texture[0].Load(int3(input.Texture * float2(1280, 720), 0));
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float4 color = float4(0, 0, 0, 0);
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if (input.DissolveLerp >= 0) {
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float4 color1 = Texture[1].Load(int3(input.Texture * float2(1280, 720), 0));
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float4 color01 = mix(color0, color1, input.TextLerp);
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float4 color2 = Texture[2].Load(int3(input.Texture * float2(1280, 720), 0));
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color = mix(color01, color2, input.DissolveLerp);
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} else {
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color = color0;
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}
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return float4(color.xyzw);
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}
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