Demo/DeferredShading: Add tone-mapping (without automatic exposure for now)

bin/resources/bloom_bright.nzsl

@@ -54,7 +54,7 @@ fn main(input: FragIn) -> FragOut
 	color /= vec3<f32>(1.0, 1.0, 1.0) + color;
 
 	let output: FragOut;
-	output.color = vec4<f32>(color, 1.0);
+	output.color = vec4<f32>(max(color, vec3<f32>(0.0, 0.0, 0.0)), 1.0);
 
 	return output;
 }

bin/resources/tone_mapping.nzsl

@@ -0,0 +1,66 @@
+[layout(std140)]
+struct ViewerData
+{
+	projectionMatrix: mat4<f32>,
+	invProjectionMatrix: mat4<f32>,
+	viewMatrix: mat4<f32>,
+	invViewMatrix: mat4<f32>,
+	viewProjMatrix: mat4<f32>,
+	invViewProjMatrix: mat4<f32>,
+	renderTargetSize: vec2<f32>,
+	invRenderTargetSize: vec2<f32>,
+	eyePosition: vec3<f32>
+}
+
+external
+{
+	[set(0), binding(0)] viewerData: uniform<ViewerData>,
+	[set(0), binding(1)] inputTexture: sampler2D<f32>
+}
+
+struct FragIn
+{
+	[builtin(fragcoord)] fragcoord: vec4<f32>
+}
+
+struct FragOut
+{
+	[location(0)] color: vec4<f32>
+}
+
+struct VertIn
+{
+	[location(0)] pos: vec3<f32>
+}
+
+struct VertOut
+{
+	[builtin(position)] position: vec4<f32>
+}
+
+[entry(frag)]
+fn main(input: FragIn) -> FragOut
+{
+	let exposure = 0.8;
+
+	let fragcoord = input.fragcoord.xy * viewerData.invRenderTargetSize;
+
+	let hdrColor = inputTexture.Sample(fragcoord).rgb;
+
+	// reinhard tone mapping
+	let mapped = vec3<f32>(1.0, 1.0, 1.0) - exp(-hdrColor * exposure);
+
+	let output: FragOut;
+	output.color = vec4<f32>(mapped, 1.0);
+
+	return output;
+}
+
+[entry(vert)]
+fn main(input: VertIn) -> VertOut
+{
+	let output: VertOut;
+	output.position = vec4<f32>(input.pos, 1.0);
+
+	return output;
+}