+
+
+
+
+#ifndef XFree86Server
+/**
+ * Draw fast, XOR line with XDrawLine in front color buffer.
+ * WARNING: this isn't fully OpenGL conformant because different pixels
+ * will be hit versus using the other line functions.
+ * Don't use the code in X server GLcore module since we need a wrapper
+ * for the XSetLineAttributes() function call.
+ */
+static void
+xor_line(GLcontext *ctx, const SWvertex *vert0, const SWvertex *vert1)
+{
+ XMesaContext xmesa = XMESA_CONTEXT(ctx);
+ XMesaDisplay *dpy = xmesa->xm_visual->display;
+ XMesaGC gc = xmesa->xm_buffer->gc;
+ GET_XRB(xrb);
+ unsigned long pixel = xmesa_color_to_pixel(ctx,
+ vert1->color[0], vert1->color[1],
+ vert1->color[2], vert1->color[3],
+ xmesa->pixelformat);
+ int x0 = (int) vert0->win[0];
+ int y0 = YFLIP(xrb, (GLint) vert0->win[1]);
+ int x1 = (int) vert1->win[0];
+ int y1 = YFLIP(xrb, (GLint) vert1->win[1]);
+ XMesaSetForeground(dpy, gc, pixel);
+ XMesaSetFunction(dpy, gc, GXxor);
+ XSetLineAttributes(dpy, gc, (int) ctx->Line.Width,
+ LineSolid, CapButt, JoinMiter);
+ XDrawLine(dpy, xrb->pixmap, gc, x0, y0, x1, y1);
+ XMesaSetFunction(dpy, gc, GXcopy); /* this gc is used elsewhere */