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#pragma BLENDER_REQUIRE(common_view_clipping_lib.glsl)
#pragma BLENDER_REQUIRE(common_view_lib.glsl)
#pragma BLENDER_REQUIRE(common_gpencil_lib.glsl)
uint outline_colorid_get(void)
{
int flag = int(abs(ObjectInfo.w));
bool is_active = (flag & DRW_BASE_ACTIVE) != 0;
if (isTransform) {
return 0u; /* colorTransform */
}
else if (is_active) {
return 3u; /* colorActive */
}
else {
return 1u; /* colorSelect */
}
return 0u;
}
/* Replace top 2 bits (of the 16bit output) by outlineId.
* This leaves 16K different IDs to create outlines between objects.
* SHIFT = (32 - (16 - 2)) */
#define SHIFT 18u
void main()
{
vec3 world_pos;
vec3 unused_N;
vec4 unused_color;
float unused_strength;
vec2 unused_uv;
gl_Position = gpencil_vertex(vec4(sizeViewport, sizeViewportInv),
world_pos,
unused_N,
unused_color,
unused_strength,
unused_uv,
gp_interp.sspos,
gp_interp.aspect,
gp_interp.thickness,
gp_interp.hardness);
/* Small bias to always be on top of the geom. */
gl_Position.z -= 1e-3;
/* ID 0 is nothing (background) */
interp.ob_id = uint(resource_handle + 1);
/* Should be 2 bits only [0..3]. */
uint outline_id = outline_colorid_get();
/* Combine for 16bit uint target. */
interp.ob_id = (outline_id << 14u) | ((interp.ob_id << SHIFT) >> SHIFT);
view_clipping_distances(world_pos);
}
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