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git-svn-id: svn://db.shs.com.ru/libs@586 a8b55f48-bf90-11e4-a774-851b48703e85

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Бычков Андрей
2019-09-02 14:08:38 +00:00
parent f862381b68
commit 3d06d2095e
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test/qglview/shaders/selection_halo.frag Normal file
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#version 150
uniform vec2 dt;
uniform vec4 selected, color;
uniform sampler2D t0;
uniform float fill;
void main(void) {
ivec2 tc = ivec2(gl_FragCoord.xy);
vec4 ds0 = abs(texelFetchOffset(t0, tc, 0, ivec2(-1, 0)) - selected);
vec4 ds1 = abs(texelFetchOffset(t0, tc, 0, ivec2( 1, 0)) - selected);
vec4 ds2 = abs(texelFetchOffset(t0, tc, 0, ivec2(0, -1)) - selected);
vec4 ds3 = abs(texelFetchOffset(t0, tc, 0, ivec2(0, 1)) - selected);
float d0 = dot(ds0, vec4(1., 1., 1., 1.)), d1 = dot(ds1, vec4(1., 1., 1., 1.)), d2 = dot(ds2, vec4(1., 1., 1., 1.)), d3 = dot(ds3, vec4(1., 1., 1., 1.));
float vs = step(1e-6, d0 + d1 + d2 + d3);
float vm = step(1e-3, (d0 * 25.) * (d1 * 25.) * (d2 * 255.) * (d3 * 255.));
float v = mix(vs - vm, vs - vm - vm + 1, fill);
//qgl_FragData[0] = vec4(1,0,0,0.5);//vec4(color.rgb, v * color.a);
qgl_FragData[0] = vec4(color.bgr, v * color.a);
}