72 lines
1.9 KiB
Plaintext
72 lines
1.9 KiB
Plaintext
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#version 330
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#extension GL_ARB_separate_shader_objects : enable
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layout(points) in;
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layout(triangle_strip, max_vertices = 36) out;
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// Input
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in gl_PerVertex
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{
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vec4 gl_Position;
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} gl_in[1];
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// Output
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out gl_PerVertex
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{
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vec4 gl_Position;
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};
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layout(location=1) out vec2 fsTex;
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uniform mat4 proj;
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uniform mat4 world;
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// Buton parameters
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uniform vec2 size;
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uniform vec4 border;
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uniform vec4 texBorder;
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void Quad(vec2 pos, vec2 size, vec2 uvMin, vec2 uvMax)
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{
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gl_Position = proj * world * vec4(pos, 0, 1);
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fsTex = vec2(uvMin.x, uvMin.y);
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EmitVertex();
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gl_Position = proj * world * vec4(pos + vec2(size.x, 0), 0, 1);
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fsTex = vec2(uvMax.x, uvMin.y);
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EmitVertex();
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gl_Position = proj * world * vec4(pos + vec2(0, size.y), 0, 1);
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fsTex = vec2(uvMin.x, uvMax.y);
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EmitVertex();
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gl_Position = proj * world * vec4(pos + vec2(size.x, size.y), 0, 1);
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fsTex = vec2(uvMax.x, uvMax.y);
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EmitVertex();
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EndPrimitive();
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}
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void main()
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{
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// Center
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vec2 inner = border.zw - border.xy;
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Quad(border.xy * size, size * inner, texBorder.xy, texBorder.zw);
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// Corners
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Quad(vec2(0,0), size * border.xy,
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vec2(0,0), texBorder.xy);
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Quad(vec2(0,size.y) - vec2(0,border.y * size.y) , size * border.xy,
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vec2(0,texBorder.w), vec2(texBorder.x,1));
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Quad(vec2(size.x,0) - vec2(border.x * size.x,0), size * border.xy,
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vec2(texBorder.z,0), vec2(1,texBorder.y));
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Quad(vec2(size.x,size.y) - vec2(border.x * size.x, border.y * size.y), size * border.xy,
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texBorder.zw, vec2(1,1));
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// Sides
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Quad(size * vec2(0,border.y), size * vec2(border.x, inner.y),
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vec2(0,texBorder.y), vec2(texBorder.x, texBorder.w));
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Quad(size * vec2(border.z,border.y), size * vec2(border.x, inner.y),
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vec2(texBorder.z,texBorder.y), vec2(1, texBorder.w));
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Quad(size * vec2(border.x,0), size * vec2(inner.x, border.y),
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vec2(texBorder.x,0), vec2(texBorder.z, texBorder.y));
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Quad(size * vec2(border.x,border.w), size * vec2(inner.x, 1-border.w),
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vec2(texBorder.x,texBorder.w), vec2(texBorder.z, 1));
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}
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