64 lines
1.5 KiB
GLSL
64 lines
1.5 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_SceneTexture;
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uniform sampler2D u_BloomTexture;
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uniform float u_Exposure;
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uniform bool u_EnableBloom;
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void main()
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{
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#if 1
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const float gamma = 2.2;
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const float pureWhite = 1.0;
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// Tonemapping
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vec3 color = texture(u_SceneTexture, v_TexCoord).rgb;
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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;
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}
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// Reinhard tonemapping
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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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// Scale color by ratio of average luminances.
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vec3 mappedColor = (mappedLuminance / luminance) * color* u_Exposure;
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// Gamma correction.
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o_Color = vec4(mappedColor, 1.0);
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#else
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const float gamma = 2.2;
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vec3 hdrColor = texture(u_SceneTexture, v_TexCoord).rgb;
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vec3 bloomColor = texture(u_BloomTexture, v_TexCoord).rgb;
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hdrColor += bloomColor; // additive blending
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// tone mapping
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vec3 result = vec3(1.0) - exp(-hdrColor * u_Exposure);
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// also gamma correct while we're at it
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result = pow(result, vec3(1.0 / gamma));
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o_Color = vec4(result, 1.0);
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#endif
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}
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