mirror of https://github.com/mgba-emu/mgba.git
22 lines
604 B
GLSL
22 lines
604 B
GLSL
// Shader that replicates the LCD Colorspace from Gameboy Advance --
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varying vec2 texCoord;
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varying mat4 profile;
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uniform sampler2D tex;
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uniform vec2 texSize;
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uniform float darken_screen;
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const float target_gamma = 2.2;
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const float display_gamma = 2.2;
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void main() {
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// bring out our stored luminance value
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float lum = profile[3].w;
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// our adjustments need to happen in linear gamma
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vec4 screen = pow(texture2D(tex, texCoord), vec4(target_gamma + darken_screen)).rgba;
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screen = clamp(screen * lum, 0.0, 1.0);
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screen = profile * screen;
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gl_FragColor = pow(screen, vec4(1.0 / display_gamma));
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}
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