static int
polygon_quad(struct render_buffer *rb, const struct vertex_pack *vbp, uint32_t color, uint32_t additive, int max, int index) {
struct vertex_pack vb[4];
int i;
vb[0] = vbp[0]; // first point
for (i=1;i<4;i++) {
int j = i + index;
int n = (j <= max) ? j : max;
vb[i] = vbp[n];
}
return renderbuffer_add(rb, vb, color, additive);
}
void
shader_draw(const struct vertex_pack vb[4], uint32_t color, uint32_t additive) {
if (renderbuffer_add(&RS->vb, vb, color, additive)) {
rs_commit();
}
}
