65 lines
1.4 KiB
GLSL
65 lines
1.4 KiB
GLSL
#type vertex
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#version 430
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layout(location = 0) in vec3 a_Position;
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layout(location = 1) in vec2 a_TexCoord;
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out vec2 v_TexCoord;
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void main()
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{
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vec4 position = vec4(a_Position.xy, 0.0, 1.0);
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v_TexCoord = a_TexCoord;
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gl_Position = position;
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}
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#type fragment
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#version 430
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layout(location = 0) out vec4 o_Color;
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in vec2 v_TexCoord;
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uniform sampler2D u_HDRTexture; // 来自 LightingPass 的 HDR 颜色
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uniform sampler2D u_BloomTexture; // 来自 BloomBlendPass 的 Bloom 纹理
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uniform bool u_EnableAutoExposure;
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uniform float u_ManualExposure;
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layout(std430, binding = 2) buffer Exposure
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{
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float u_Exposure;
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};
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uniform bool u_EnableBloom;
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const float gamma = 2.2;
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const float pureWhite = 1.0;
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void main()
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{
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// 采样 HDR 颜色（单样本）
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vec3 color = texture(u_HDRTexture, v_TexCoord).rgb;
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// 混合 Bloom（如果启用）
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if (u_EnableBloom)
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{
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vec3 bloomColor = texture(u_BloomTexture, v_TexCoord).rgb;
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color += bloomColor; // 在 HDR 空间混合
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}
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// 应用曝光
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if (u_EnableAutoExposure)
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color *= u_Exposure;
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else
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color *= u_ManualExposure;
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// Reinhard 色调映射
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float luminance = dot(color, vec3(0.2126, 0.7152, 0.0722));
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float mappedLuminance = (luminance * (1.0 + luminance / (pureWhite * pureWhite))) / (1.0 + luminance);
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// 按亮度比例缩放颜色
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vec3 mappedColor = (mappedLuminance / luminance) * color;
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// Gamma 校正
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o_Color = vec4(pow(mappedColor, vec3(1.0 / gamma)), 1.0);
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} |