shaders: Implement HLSL for lessons 2-8

scripts/compile_shaders.py

@@ -213,7 +213,7 @@ def compile_dxbc_shader(shader: Shader, type: str, flags: list[str] | None = Non
 def compile_shaders() -> None:
 	build_spirv = True
 	build_metal = True
-	build_dxil = False
+	build_dxil = True
 	build_dxbc = False
 	lessons = [ "lesson2", "lesson3", "lesson6", "lesson7", "lesson8", "lesson9" ]
 	src_dir = Path("src/shaders")

src/shaders/lesson2.hlsl

@@ -0,0 +1,31 @@
+/*
+ * SPDX-FileCopyrightText: (C) 2025 a dinosaur
+ * SPDX-License-Identifier: Zlib
+ */
+
+struct VertexInput
+{
+	float3 position : TEXCOORD0;
+};
+
+cbuffer VertexUniform : register(b0, space1)
+{
+	float4x4 viewproj : packoffset(c0);
+};
+
+struct Vertex2Pixel
+{
+	float4 position : SV_Position;
+};
+
+Vertex2Pixel VertexMain(VertexInput input)
+{
+	Vertex2Pixel output;
+	output.position = mul(viewproj, float4(input.position, 1.0));
+	return output;
+}
+
+half4 PixelMain(Vertex2Pixel input) : SV_Target0
+{
+	return half4(1.0, 1.0, 1.0, 1.0);
+}

src/shaders/lesson3.hlsl

@@ -0,0 +1,34 @@
+/*
+ * SPDX-FileCopyrightText: (C) 2025 a dinosaur
+ * SPDX-License-Identifier: Zlib
+ */
+
+struct VertexInput
+{
+	float3 position : TEXCOORD0;
+	float4 color : TEXCOORD1;
+};
+
+cbuffer VertexUniform : register(b0, space1)
+{
+	float4x4 viewproj : packoffset(c0);
+};
+
+struct Vertex2Pixel
+{
+	float4 position : SV_Position;
+	half4 color : COLOR0;
+};
+
+Vertex2Pixel VertexMain(VertexInput input)
+{
+	Vertex2Pixel output;
+	output.position = mul(viewproj, float4(input.position, 1.0));
+	output.color = half4(input.color);
+	return output;
+}
+
+half4 PixelMain(Vertex2Pixel input) : SV_Target0
+{
+	return input.color;
+}

src/shaders/lesson6.hlsl

@@ -0,0 +1,37 @@
+/*
+ * SPDX-FileCopyrightText: (C) 2025 a dinosaur
+ * SPDX-License-Identifier: Zlib
+ */
+
+struct VertexInput
+{
+	float3 position : TEXCOORD0;
+	float2 texcoord : TEXCOORD1;
+};
+
+cbuffer VertexUniform : register(b0, space1)
+{
+	float4x4 viewproj : packoffset(c0);
+};
+
+struct Vertex2Pixel
+{
+	float4 position : SV_Position;
+	float2 texcoord : TEXCOORD0;
+};
+
+Vertex2Pixel VertexMain(VertexInput input)
+{
+	Vertex2Pixel output;
+	output.position = mul(viewproj, float4(input.position, 1.0));
+	output.texcoord = input.texcoord;
+	return output;
+}
+
+Texture2D<half4> Texture : register(t0, space2);
+SamplerState Sampler : register(s0, space2);
+
+half4 PixelMain(Vertex2Pixel input) : SV_Target0
+{
+	return Texture.Sample(Sampler, input.texcoord);
+}

src/shaders/lesson7.hlsl

@@ -0,0 +1,59 @@
+/*
+ * SPDX-FileCopyrightText: (C) 2025 a dinosaur
+ * SPDX-License-Identifier: Zlib
+ */
+
+struct VertexInput
+{
+	float3 position : TEXCOORD0;
+	float2 texcoord : TEXCOORD1;
+	float3 normal : TEXCOORD2;
+};
+
+cbuffer VertexUniform : register(b0, space1)
+{
+	float4x4 modelView : packoffset(c0);
+	float4x4 projection : packoffset(c4);
+};
+
+cbuffer LightUniform : register(b1, space1)
+{
+	float4 lightAmbient : packoffset(c0);
+	float4 lightDiffuse : packoffset(c1);
+	float4 lightPosition : packoffset(c2);
+};
+
+struct Vertex2Pixel
+{
+	float4 position : SV_Position;
+	float2 texcoord : TEXCOORD0;
+	half4 color : COLOR0;
+};
+
+Vertex2Pixel VertexMain(VertexInput input)
+{
+	const float4 position = mul(modelView, float4(input.position, 1.0));
+	const float3 normal = normalize(mul(modelView, float4(input.normal, 0.0))).xyz;
+
+	const float3 lightVec = lightPosition.xyz - position.xyz;
+	const float lightDist2 = dot(lightVec, lightVec);
+	const float3 dir = rsqrt(lightDist2) * lightVec;
+	const float lambert = max(0.0, dot(normal, dir));
+
+	const half3 ambient = 0.04 + 0.2 * half3(lightAmbient.rgb);
+	const half3 diffuse = 0.8 * half3(lightDiffuse.rgb);
+
+	Vertex2Pixel output;
+	output.position = mul(projection, position);
+	output.texcoord = input.texcoord;
+	output.color = half4(ambient + lambert * diffuse, 1.0);
+	return output;
+}
+
+Texture2D<half4> Texture : register(t0, space2);
+SamplerState Sampler : register(s0, space2);
+
+half4 PixelMain(Vertex2Pixel input) : SV_Target0
+{
+	return input.color * Texture.Sample(Sampler, input.texcoord);
+}

src/shaders/lesson8.hlsl

@@ -0,0 +1,40 @@
+/*
+ * SPDX-FileCopyrightText: (C) 2025 a dinosaur
+ * SPDX-License-Identifier: Zlib
+ */
+
+struct VertexInput
+{
+	float3 position : TEXCOORD0;
+	float2 texcoord : TEXCOORD1;
+};
+
+cbuffer VertexUniform : register(b0, space1)
+{
+	float4x4 viewproj : packoffset(c0);
+	float4 color : packoffset(c4);
+};
+
+struct Vertex2Pixel
+{
+	float4 position : SV_Position;
+	float2 texcoord : TEXCOORD0;
+	half4 color : COLOR0;
+};
+
+Vertex2Pixel VertexMain(VertexInput input)
+{
+	Vertex2Pixel output;
+	output.position = mul(viewproj, float4(input.position, 1.0));
+	output.texcoord = input.texcoord;
+	output.color = half4(color);
+	return output;
+}
+
+Texture2D<half4> Texture : register(t0, space2);
+SamplerState Sampler : register(s0, space2);
+
+half4 PixelMain(Vertex2Pixel input) : SV_Target0
+{
+	return input.color * Texture.Sample(Sampler, input.texcoord);
+}