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Formalize builtin fullscreen shaders

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ssdfasd
2026-04-07 04:30:26 +08:00
parent 7f0d1f0b08
commit 5bfe484f5d
26 changed files with 746 additions and 713 deletions
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79
engine/assets/builtin/shaders/skybox/skybox.frag.glsl
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@@ -1,79 +0,0 @@
// XC_BUILTIN_SKYBOX_OPENGL_PS
#version 430
layout(binding = 0) uniform sampler2D uSkyboxPanoramicTexture;
layout(binding = 1) uniform samplerCube uSkyboxTexture;
layout(std140, binding = 0) uniform EnvironmentConstants {
vec4 gSkyboxTopColor;
vec4 gSkyboxHorizonColor;
vec4 gSkyboxBottomColor;
vec4 gCameraRightAndTanHalfFov;
vec4 gCameraUpAndAspect;
vec4 gCameraForwardAndUnused;
};
layout(std140, binding = 1) uniform MaterialConstants {
vec4 gSkyboxTintAndExposure;
vec4 gSkyboxRotationAndMode;
};
in vec2 vNdc;
layout(location = 0) out vec4 fragColor;
const float XC_PI = 3.14159265358979323846;
const float XC_INV_PI = 0.31830988618379067154;
const float XC_INV_TWO_PI = 0.15915494309189533577;
vec3 EvaluateProceduralSkybox(vec3 viewRay) {
float vertical = clamp(viewRay.y, -1.0, 1.0);
vec3 color = gSkyboxHorizonColor.rgb;
if (vertical >= 0.0) {
color = mix(gSkyboxHorizonColor.rgb, gSkyboxTopColor.rgb, pow(clamp(vertical, 0.0, 1.0), 0.65));
} else {
color = mix(gSkyboxHorizonColor.rgb, gSkyboxBottomColor.rgb, pow(clamp(-vertical, 0.0, 1.0), 0.55));
}
return color;
}
vec3 RotateAroundY(vec3 viewRay) {
float rotation = gSkyboxRotationAndMode.x;
float sinTheta = sin(rotation);
float cosTheta = cos(rotation);
return normalize(vec3(
viewRay.x * cosTheta - viewRay.z * sinTheta,
viewRay.y,
viewRay.x * sinTheta + viewRay.z * cosTheta));
}
vec2 ComputePanoramicUv(vec3 viewRay) {
vec3 rotatedRay = RotateAroundY(viewRay);
float u = fract(atan(rotatedRay.z, rotatedRay.x) * XC_INV_TWO_PI + 0.5);
float v = acos(clamp(rotatedRay.y, -1.0, 1.0)) * XC_INV_PI;
return vec2(u, clamp(v, 0.0, 1.0));
}
void main() {
float tanHalfFov = gCameraRightAndTanHalfFov.w;
float aspect = gCameraUpAndAspect.w;
vec3 viewRay = normalize(
gCameraForwardAndUnused.xyz +
vNdc.x * aspect * tanHalfFov * gCameraRightAndTanHalfFov.xyz +
vNdc.y * tanHalfFov * gCameraUpAndAspect.xyz);
vec3 color = EvaluateProceduralSkybox(viewRay);
if (gSkyboxRotationAndMode.y > 1.5) {
color = texture(uSkyboxTexture, RotateAroundY(viewRay)).rgb *
gSkyboxTintAndExposure.rgb *
gSkyboxTintAndExposure.w;
} else if (gSkyboxRotationAndMode.y > 0.5) {
color = texture(uSkyboxPanoramicTexture, ComputePanoramicUv(viewRay)).rgb *
gSkyboxTintAndExposure.rgb *
gSkyboxTintAndExposure.w;
}
fragColor = vec4(color, 1.0);
}

80
engine/assets/builtin/shaders/skybox/skybox.frag.vk.glsl
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@@ -1,80 +0,0 @@
// XC_BUILTIN_SKYBOX_VULKAN_PS
#version 450
layout(set = 0, binding = 0, std140) uniform EnvironmentConstants {
vec4 gSkyboxTopColor;
vec4 gSkyboxHorizonColor;
vec4 gSkyboxBottomColor;
vec4 gCameraRightAndTanHalfFov;
vec4 gCameraUpAndAspect;
vec4 gCameraForwardAndUnused;
};
layout(set = 1, binding = 0, std140) uniform MaterialConstants {
vec4 gSkyboxTintAndExposure;
vec4 gSkyboxRotationAndMode;
};
layout(set = 2, binding = 0) uniform texture2D uSkyboxPanoramicTexture;
layout(set = 3, binding = 0) uniform textureCube uSkyboxTexture;
layout(set = 4, binding = 0) uniform sampler uLinearSampler;
layout(location = 0) in vec2 vNdc;
layout(location = 0) out vec4 fragColor;
const float XC_PI = 3.14159265358979323846;
const float XC_INV_PI = 0.31830988618379067154;
const float XC_INV_TWO_PI = 0.15915494309189533577;
vec3 EvaluateProceduralSkybox(vec3 viewRay) {
float vertical = clamp(viewRay.y, -1.0, 1.0);
vec3 color = gSkyboxHorizonColor.rgb;
if (vertical >= 0.0) {
color = mix(gSkyboxHorizonColor.rgb, gSkyboxTopColor.rgb, pow(clamp(vertical, 0.0, 1.0), 0.65));
} else {
color = mix(gSkyboxHorizonColor.rgb, gSkyboxBottomColor.rgb, pow(clamp(-vertical, 0.0, 1.0), 0.55));
}
return color;
}
vec3 RotateAroundY(vec3 viewRay) {
float rotation = gSkyboxRotationAndMode.x;
float sinTheta = sin(rotation);
float cosTheta = cos(rotation);
return normalize(vec3(
viewRay.x * cosTheta - viewRay.z * sinTheta,
viewRay.y,
viewRay.x * sinTheta + viewRay.z * cosTheta));
}
vec2 ComputePanoramicUv(vec3 viewRay) {
vec3 rotatedRay = RotateAroundY(viewRay);
float u = fract(atan(rotatedRay.z, rotatedRay.x) * XC_INV_TWO_PI + 0.5);
float v = acos(clamp(rotatedRay.y, -1.0, 1.0)) * XC_INV_PI;
return vec2(u, clamp(v, 0.0, 1.0));
}
void main() {
float tanHalfFov = gCameraRightAndTanHalfFov.w;
float aspect = gCameraUpAndAspect.w;
vec3 viewRay = normalize(
gCameraForwardAndUnused.xyz +
vNdc.x * aspect * tanHalfFov * gCameraRightAndTanHalfFov.xyz +
vNdc.y * tanHalfFov * gCameraUpAndAspect.xyz);
vec3 color = EvaluateProceduralSkybox(viewRay);
if (gSkyboxRotationAndMode.y > 1.5) {
color = texture(samplerCube(uSkyboxTexture, uLinearSampler), RotateAroundY(viewRay)).rgb *
gSkyboxTintAndExposure.rgb *
gSkyboxTintAndExposure.w;
} else if (gSkyboxRotationAndMode.y > 0.5) {
color = texture(sampler2D(uSkyboxPanoramicTexture, uLinearSampler), ComputePanoramicUv(viewRay)).rgb *
gSkyboxTintAndExposure.rgb *
gSkyboxTintAndExposure.w;
}
fragColor = vec4(color, 1.0);
}

79
engine/assets/builtin/shaders/skybox/skybox.ps.hlsl
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@@ -1,79 +0,0 @@
// XC_BUILTIN_SKYBOX_D3D12_PS
Texture2D gSkyboxPanoramicTexture : register(t0);
TextureCube gSkyboxTexture : register(t1);
SamplerState gLinearSampler : register(s0);
cbuffer EnvironmentConstants : register(b0) {
float4 gSkyboxTopColor;
float4 gSkyboxHorizonColor;
float4 gSkyboxBottomColor;
float4 gCameraRightAndTanHalfFov;
float4 gCameraUpAndAspect;
float4 gCameraForwardAndUnused;
}
cbuffer MaterialConstants : register(b1) {
float4 gSkyboxTintAndExposure;
float4 gSkyboxRotationAndMode;
}
struct PSInput {
float4 position : SV_POSITION;
float2 ndc : TEXCOORD0;
};
static const float XC_PI = 3.14159265358979323846f;
static const float XC_INV_PI = 0.31830988618379067154f;
static const float XC_INV_TWO_PI = 0.15915494309189533577f;
float3 EvaluateProceduralSkybox(float3 viewRay) {
const float vertical = clamp(viewRay.y, -1.0f, 1.0f);
float3 color = gSkyboxHorizonColor.rgb;
if (vertical >= 0.0f) {
color = lerp(gSkyboxHorizonColor.rgb, gSkyboxTopColor.rgb, pow(saturate(vertical), 0.65f));
} else {
color = lerp(gSkyboxHorizonColor.rgb, gSkyboxBottomColor.rgb, pow(saturate(-vertical), 0.55f));
}
return color;
}
float3 RotateAroundY(float3 viewRay) {
const float rotation = gSkyboxRotationAndMode.x;
const float sinTheta = sin(rotation);
const float cosTheta = cos(rotation);
return normalize(float3(
viewRay.x * cosTheta - viewRay.z * sinTheta,
viewRay.y,
viewRay.x * sinTheta + viewRay.z * cosTheta));
}
float2 ComputePanoramicUv(float3 viewRay) {
const float3 rotatedRay = RotateAroundY(viewRay);
const float u = frac(atan2(rotatedRay.z, rotatedRay.x) * XC_INV_TWO_PI + 0.5f);
const float v = acos(clamp(rotatedRay.y, -1.0f, 1.0f)) * XC_INV_PI;
return float2(u, saturate(v));
}
float4 MainPS(PSInput input) : SV_Target {
const float tanHalfFov = gCameraRightAndTanHalfFov.w;
const float aspect = gCameraUpAndAspect.w;
float3 viewRay = normalize(
gCameraForwardAndUnused.xyz +
input.ndc.x * aspect * tanHalfFov * gCameraRightAndTanHalfFov.xyz +
input.ndc.y * tanHalfFov * gCameraUpAndAspect.xyz);
float3 color = EvaluateProceduralSkybox(viewRay);
if (gSkyboxRotationAndMode.y > 1.5f) {
color = gSkyboxTexture.Sample(gLinearSampler, RotateAroundY(viewRay)).rgb *
gSkyboxTintAndExposure.rgb *
gSkyboxTintAndExposure.w;
} else if (gSkyboxRotationAndMode.y > 0.5f) {
color = gSkyboxPanoramicTexture.Sample(gLinearSampler, ComputePanoramicUv(viewRay)).rgb *
gSkyboxTintAndExposure.rgb *
gSkyboxTintAndExposure.w;
}
return float4(color, 1.0f);
}

117
engine/assets/builtin/shaders/skybox/skybox.shader
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@@ -8,26 +8,121 @@ Shader "Builtin Skybox"
_MainTex ("Panoramic", 2D) = "white" [Semantic(SkyboxPanoramicTexture)]
_Tex ("Cubemap (HDR)", Cube) = "white" [Semantic(SkyboxTexture)]
}
HLSLINCLUDE
cbuffer EnvironmentConstants : register(b0)
{
float4 gSkyboxTopColor;
float4 gSkyboxHorizonColor;
float4 gSkyboxBottomColor;
float4 gCameraRightAndTanHalfFov;
float4 gCameraUpAndAspect;
float4 gCameraForwardAndUnused;
};
cbuffer MaterialConstants : register(b1)
{
float4 gSkyboxTintAndExposure;
float4 gSkyboxRotationAndMode;
};
Texture2D SkyboxPanoramicTexture : register(t0);
TextureCube SkyboxTexture : register(t1);
SamplerState LinearClampSampler : register(s0);
struct VSOutput
{
float4 position : SV_POSITION;
float2 ndc : TEXCOORD0;
};
static const float XC_PI = 3.14159265358979323846f;
static const float XC_INV_PI = 0.31830988618379067154f;
static const float XC_INV_TWO_PI = 0.15915494309189533577f;
VSOutput MainVS(uint vertexId : SV_VertexID)
{
const float2 positions[3] = {
float2(-1.0f, -1.0f),
float2(-1.0f, 3.0f),
float2( 3.0f, -1.0f)
};
VSOutput output;
output.position = float4(positions[vertexId], 1.0f, 1.0f);
output.ndc = positions[vertexId];
return output;
}
float3 EvaluateProceduralSkybox(float3 viewRay)
{
const float vertical = clamp(viewRay.y, -1.0f, 1.0f);
float3 color = gSkyboxHorizonColor.rgb;
if (vertical >= 0.0f) {
color = lerp(gSkyboxHorizonColor.rgb, gSkyboxTopColor.rgb, pow(saturate(vertical), 0.65f));
} else {
color = lerp(gSkyboxHorizonColor.rgb, gSkyboxBottomColor.rgb, pow(saturate(-vertical), 0.55f));
}
return color;
}
float3 RotateAroundY(float3 viewRay)
{
const float rotation = gSkyboxRotationAndMode.x;
const float sinTheta = sin(rotation);
const float cosTheta = cos(rotation);
return normalize(float3(
viewRay.x * cosTheta - viewRay.z * sinTheta,
viewRay.y,
viewRay.x * sinTheta + viewRay.z * cosTheta));
}
float2 ComputePanoramicUv(float3 viewRay)
{
const float3 rotatedRay = RotateAroundY(viewRay);
const float u = frac(atan2(rotatedRay.z, rotatedRay.x) * XC_INV_TWO_PI + 0.5f);
const float v = acos(clamp(rotatedRay.y, -1.0f, 1.0f)) * XC_INV_PI;
return float2(u, saturate(v));
}
float4 MainPS(VSOutput input) : SV_TARGET
{
const float tanHalfFov = gCameraRightAndTanHalfFov.w;
const float aspect = gCameraUpAndAspect.w;
const float3 viewRay = normalize(
gCameraForwardAndUnused.xyz +
input.ndc.x * aspect * tanHalfFov * gCameraRightAndTanHalfFov.xyz +
input.ndc.y * tanHalfFov * gCameraUpAndAspect.xyz);
float3 color = EvaluateProceduralSkybox(viewRay);
if (gSkyboxRotationAndMode.y > 1.5f) {
color = SkyboxTexture.Sample(LinearClampSampler, RotateAroundY(viewRay)).rgb *
gSkyboxTintAndExposure.rgb *
gSkyboxTintAndExposure.w;
} else if (gSkyboxRotationAndMode.y > 0.5f) {
color = SkyboxPanoramicTexture.Sample(LinearClampSampler, ComputePanoramicUv(viewRay)).rgb *
gSkyboxTintAndExposure.rgb *
gSkyboxTintAndExposure.w;
}
return float4(color, 1.0f);
}
ENDHLSL
SubShader
{
Pass
{
Name "Skybox"
Tags { "LightMode" = "Skybox" }
Resources
{
EnvironmentConstants (ConstantBuffer, 0, 0) [Semantic(Environment)]
MaterialConstants (ConstantBuffer, 1, 0) [Semantic(Material)]
SkyboxPanoramicTexture (Texture2D, 2, 0) [Semantic(SkyboxPanoramicTexture)]
SkyboxTexture (TextureCube, 3, 0) [Semantic(SkyboxTexture)]
LinearClampSampler (Sampler, 4, 0) [Semantic(LinearClampSampler)]
}
Cull Off
ZWrite Off
ZTest LEqual
Blend Off
HLSLPROGRAM
#pragma target 4.5
#pragma vertex MainVS
#pragma fragment MainPS
#pragma backend D3D12 HLSL "skybox.vs.hlsl" "skybox.ps.hlsl" vs_5_0 ps_5_0
#pragma backend OpenGL GLSL "skybox.vert.glsl" "skybox.frag.glsl"
#pragma backend Vulkan GLSL "skybox.vert.vk.glsl" "skybox.frag.vk.glsl"
ENDHLSL
}
}

16
engine/assets/builtin/shaders/skybox/skybox.vert.glsl
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@@ -1,16 +0,0 @@
// XC_BUILTIN_SKYBOX_OPENGL_VS
#version 430
out vec2 vNdc;
void main() {
const vec2 positions[3] = vec2[3](
vec2(-1.0, -1.0),
vec2(-1.0, 3.0),
vec2( 3.0, -1.0)
);
vec2 position = positions[gl_VertexID];
gl_Position = vec4(position, 1.0, 1.0);
vNdc = position;
}

16
engine/assets/builtin/shaders/skybox/skybox.vert.vk.glsl
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@@ -1,16 +0,0 @@
// XC_BUILTIN_SKYBOX_VULKAN_VS
#version 450
layout(location = 0) out vec2 vNdc;
void main() {
const vec2 positions[3] = vec2[3](
vec2(-1.0, -1.0),
vec2(-1.0, 3.0),
vec2( 3.0, -1.0)
);
vec2 position = positions[gl_VertexIndex];
gl_Position = vec4(position, 1.0, 1.0);
vNdc = position;
}

18
engine/assets/builtin/shaders/skybox/skybox.vs.hlsl
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@@ -1,18 +0,0 @@
// XC_BUILTIN_SKYBOX_D3D12_VS
struct VSOutput {
float4 position : SV_POSITION;
float2 ndc : TEXCOORD0;
};
VSOutput MainVS(uint vertexId : SV_VertexID) {
const float2 positions[3] = {
float2(-1.0f, -1.0f),
float2(-1.0f, 3.0f),
float2( 3.0f, -1.0f)
};
VSOutput output;
output.position = float4(positions[vertexId], 1.0f, 1.0f);
output.ndc = positions[vertexId];
return output;
}