29 lines
697 B
GLSL
29 lines
697 B
GLSL
uniform mat4 projection;
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uniform mat4 view;
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const vec2 verts[3] = vec2[3](
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vec2(0.5f, 1.0f),
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vec2(0.0f, 0.0f),
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vec2(1.0f, 0.0f)
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);
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out vec2 vert;
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out vec4 color;
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vec4 srgb_to_linear(vec4 srgb_color) {
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// Calcuation as documented by OpenGL
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vec3 srgb = srgb_color.rgb;
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vec3 selector = ceil(srgb - 0.04045);
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vec3 less_than_branch = srgb / 12.92;
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vec3 greater_than_branch = pow((srgb + 0.055) / 1.055, vec3(2.4));
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return vec4(
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mix(less_than_branch, greater_than_branch, selector),
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srgb_color.a
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);
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}
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void main() {
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vert = verts[gl_VertexID];
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color = srgb_to_linear(vec4(vert, 0.5, 1.0));
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gl_Position = vec4(vert - 0.5, 0.0, 1.0);
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} |