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#define ACTIVE_NURB 1 << 7 /* Keep the same value of `ACTIVE_NURB` in `draw_cache_imp_curve.c` */
layout(lines) in;
layout(line_strip, max_vertices = 6) out;
uniform vec2 viewportSize;
flat in int vertFlag[];
flat out vec4 finalColor;
void main()
{
/* TODO: vertex size */
vec4 v1 = gl_in[0].gl_Position;
vec4 v2 = gl_in[1].gl_Position;
int is_active_nurb = vertFlag[1] & ACTIVE_NURB;
int color_id = vertFlag[1] ^ is_active_nurb;
if (is_active_nurb != 0) {
/* draw the outline. */
vec2 v1_2 = v2.xy - v1.xy;
vec2 offset;
if (abs(v1_2.x * viewportSize.x) < abs(v1_2.y * viewportSize.y)) {
offset = vec2(2.0 / viewportSize.x, 0.0);
}
else {
offset = vec2(0.0, 2.0 / viewportSize.y);
}
finalColor = colorActiveSpline;
gl_Position = v1;
gl_Position.xy += offset * v1.w;
EmitVertex();
gl_Position = v2;
gl_Position.xy += offset * v2.w;
EmitVertex();
EndPrimitive();
gl_Position = v1;
gl_Position.xy -= offset * v1.w;
EmitVertex();
gl_Position = v2;
gl_Position.xy -= offset * v2.w;
EmitVertex();
EndPrimitive();
}
if (color_id == 0) finalColor = colorHandleFree;
else if (color_id == 1) finalColor = colorHandleAuto;
else if (color_id == 2) finalColor = colorHandleVect;
else if (color_id == 3) finalColor = colorHandleAlign;
else if (color_id == 4) finalColor = colorHandleAutoclamp;
else if (color_id == 5) finalColor = colorHandleSelFree;
else if (color_id == 6) finalColor = colorHandleSelAuto;
else if (color_id == 7) finalColor = colorHandleSelVect;
else if (color_id == 8) finalColor = colorHandleSelAlign;
else if (color_id == 9) finalColor = colorHandleSelAutoclamp;
else if (color_id == 10) finalColor = colorNurbUline;
else if (color_id == 11) finalColor = colorNurbSelUline;
else finalColor = colorVertexSelect;
gl_Position = v1;
EmitVertex();
gl_Position = v2;
EmitVertex();
EndPrimitive();
}
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