Squashed 'nx-X11/extras/Mesa_6.4.2/' content from commit 475b1f7

git-subtree-dir: nx-X11/extras/Mesa_6.4.2
git-subtree-split: 475b1f7b56fa36ef4f3b22a749f88a98ddc0d502

1 files changed, 42 insertions, 0 deletions

diff --git a/progs/util/winpos.c b/progs/util/winpos.c
new file mode 100644
index 000000000..5ad98fd27
--- /dev/null
+++ b/progs/util/winpos.c
@@ -0,0 +1,42 @@
+/* winpos.c */
+
+
+/*
+ * Set the current raster position to a specific window
+ * coordinate.  Also see the GL_MESA_window_pos extension.
+ *
+ * Written by Brian Paul and in the public domain.
+ */
+
+
+void WindowPos( GLfloat x, GLfloat y, GLfloat z )
+{
+   GLfloat fx, fy;
+
+   /* Push current matrix mode and viewport attributes */
+   glPushAttrib( GL_TRANSFORM_BIT | GL_VIEWPORT_BIT );
+
+   /* Setup projection parameters */
+   glMatrixMode( GL_PROJECTION );
+   glPushMatrix();
+   glLoadIdentity();
+   glMatrixMode( GL_MODELVIEW );
+   glPushMatrix();
+   glLoadIdentity();
+
+   glDepthRange( z, z );
+   glViewport( (int) x - 1, (int) y - 1, 2, 2 );
+
+   /* set the raster (window) position */
+   fx = x - (int) x;
+   fy = y - (int) y;
+   glRasterPos3f( fx, fy, 0.0 );
+
+   /* restore matrices, viewport and matrix mode */
+   glPopMatrix();
+   glMatrixMode( GL_PROJECTION );
+   glPopMatrix();
+
+   glPopAttrib();
+}
+