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#pragma BLENDER_REQUIRE(common_view_clipping_lib.glsl)
#pragma BLENDER_REQUIRE(common_view_lib.glsl)
void do_vertex(vec4 color, vec4 pos, float coord, vec2 offset)
{
geometry_out.finalColor = color;
geometry_out.edgeCoord = coord;
gl_Position = pos;
/* Multiply offset by 2 because gl_Position range is [-1..1]. */
gl_Position.xy += offset * 2.0 * pos.w;
/* Correct but fails due to an AMD compiler bug, see: T62792.
* Do inline instead. */
#if 0
view_clipping_distances_set(gl_in[i]);
#endif
EmitVertex();
}
void main()
{
vec2 ss_pos[2];
/* Clip line against near plane to avoid deformed lines. */
vec4 pos0 = gl_in[0].gl_Position;
vec4 pos1 = gl_in[1].gl_Position;
vec2 pz_ndc = vec2(pos0.z / pos0.w, pos1.z / pos1.w);
bvec2 clipped = lessThan(pz_ndc, vec2(-1.0));
if (all(clipped)) {
/* Totally clipped. */
return;
}
vec4 pos01 = pos0 - pos1;
float ofs = abs((pz_ndc.y + 1.0) / (pz_ndc.x - pz_ndc.y));
if (clipped.y) {
pos1 += pos01 * ofs;
}
else if (clipped.x) {
pos0 -= pos01 * (1.0 - ofs);
}
ss_pos[0] = pos0.xy / pos0.w;
ss_pos[1] = pos1.xy / pos1.w;
vec2 line = ss_pos[0] - ss_pos[1];
line = abs(line) * sizeViewport.xy;
geometry_out.finalColorOuter = geometry_in[0].finalColorOuter_;
float half_size = sizeEdge;
/* Enlarge edge for flag display. */
half_size += (geometry_out.finalColorOuter.a > 0.0) ? max(sizeEdge, 1.0) : 0.0;
if (do_smooth_wire) {
/* Add 1 px for AA */
half_size += 0.5;
}
vec3 edge_ofs = vec3(half_size * drw_view.viewport_size_inverse, 0.0);
bool horizontal = line.x > line.y;
edge_ofs = (horizontal) ? edge_ofs.zyz : edge_ofs.xzz;
/* Due to an AMD glitch, this line was moved out of the `do_vertex`
* function (see T62792). */
view_clipping_distances_set(gl_in[0]);
do_vertex(geometry_in[0].finalColor_, pos0, half_size, edge_ofs.xy);
do_vertex(geometry_in[0].finalColor_, pos0, -half_size, -edge_ofs.xy);
view_clipping_distances_set(gl_in[1]);
vec4 final_color = (geometry_in[0].selectOverride_ == 0) ? geometry_in[1].finalColor_ :
geometry_in[0].finalColor_;
do_vertex(final_color, pos1, half_size, edge_ofs.xy);
do_vertex(final_color, pos1, -half_size, -edge_ofs.xy);
EndPrimitive();
}
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