438999d24f
2. gl_FragCoord can be used at ogl140 with extension "GL_ARB_fragment_coord_conventions". Signed-off-by: ZhiqianXia <xzq0528@outlook.com>
36 lines
720 B
GLSL
36 lines
720 B
GLSL
#version 140
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#extension GL_ARB_fragment_coord_conventions: require
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#extension GL_ARB_explicit_attrib_location : enable
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#ifdef GL_ES
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precision mediump float;
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#endif
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in vec4 i;
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layout (origin_upper_left,pixel_center_integer) in vec4 gl_FragCoord;
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layout (location = 0) out vec4 myColor;
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const float eps=0.001;
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void main()
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{
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myColor = vec4(0.2);
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if (gl_FragCoord.y >= 10) {
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myColor.b = 0.8;
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}
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if (gl_FragCoord.y == trunc(gl_FragCoord.y)) {
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myColor.g = 0.8;
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}
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if (gl_FragCoord.x == trunc(gl_FragCoord.x)) {
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myColor.r = 0.8;
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}
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vec4 diff = gl_FragCoord - i;
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if (abs(diff.z)>eps)
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myColor.b = 0.5;
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if (abs(diff.w)>eps)
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myColor.a = 0.5;
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} |