34 lines
710 B
GLSL
34 lines
710 B
GLSL
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#version 330
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#define FLAG_RED (1<<0)
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#define FLAG_GREEN (1<<1)
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#define FLAG_BLUE (1<<2)
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#define FLAG_ALPHA (1<<3)
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#define FLAG_COLORS (FLAG_RED | FLAG_GREEN | FLAG_BLUE | FLAG_ALPHA)
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#define FLAG_LINEAR (1<<4)
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uniform sampler2D tex;
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uniform int flags;
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in vec2 fragUV;
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in vec4 fragColor;
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out vec4 outputColor;
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const float gamma = 2.2;
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void main() {
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if ((flags & FLAG_COLORS) == FLAG_RED) {
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outputColor = vec4(fragColor.rgb, fragColor.a * texture(tex, fragUV.st).r);
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} else {
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vec4 color = texture(tex, fragUV.st);
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if ((flags & FLAG_LINEAR) != 0)
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color.rgb = pow(color.rgb, vec3(1.0/gamma));
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outputColor = color * fragColor;
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if ((flags & FLAG_ALPHA) == 0)
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outputColor.a = 1;
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}
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}
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