Initial revision

1 files changed, 105 insertions, 0 deletions

diff --git a/src/mesa/main/clip.h b/src/mesa/main/clip.h
new file mode 100644
index 0000000..03e09ca
--- /dev/null
+++ b/src/mesa/main/clip.h
@@ -0,0 +1,105 @@
+/* $Id: clip.h,v 1.1 1999/08/19 00:55:41 jtg Exp $ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version:  3.1
+ * 
+ * Copyright (C) 1999  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+
+
+
+#ifndef CLIP_H
+#define CLIP_H
+
+
+#include "types.h"
+
+
+
+#ifdef DEBUG
+#  define GL_VIEWCLIP_POINT( V )   gl_viewclip_point( V )
+#else
+#  define GL_VIEWCLIP_POINT( V )			\
+     (    (V)[0] <= (V)[3] && (V)[0] >= -(V)[3]		\
+       && (V)[1] <= (V)[3] && (V)[1] >= -(V)[3]		\
+       && (V)[2] <= (V)[3] && (V)[2] >= -(V)[3] )
+#endif
+
+
+
+typedef GLuint (*clip_line_func)( struct vertex_buffer *VB, 
+				  GLuint *i, GLuint *j,
+				  GLubyte mask);
+typedef GLuint (*clip_poly_func)( struct vertex_buffer *VB,
+				  GLuint n, GLuint vlist[],
+				  GLubyte mask );
+
+
+extern clip_poly_func gl_poly_clip_tab[5];
+extern clip_line_func gl_line_clip_tab[5];
+
+extern void gl_init_clip(void);
+
+
+extern GLuint gl_viewclip_point( const GLfloat v[] );
+
+
+
+extern GLuint gl_userclip_point( GLcontext* ctx, const GLfloat v[] );
+
+
+extern void gl_user_cliptest( struct vertex_buffer *VB );
+
+
+extern void gl_ClipPlane( GLcontext* ctx,
+                          GLenum plane, const GLfloat *equation );
+
+extern void gl_GetClipPlane( GLcontext* ctx,
+                             GLenum plane, GLdouble *equation );
+
+
+/*
+ * Clipping interpolation functions
+ */
+
+extern void gl_clip_interp_all( struct vertex_buffer *VB, 
+                                GLuint dst, GLfloat t, GLuint in, GLuint out );
+
+extern void gl_clip_interp_color_tex( struct vertex_buffer *VB,
+                                GLuint dst, GLfloat t, GLuint in, GLuint out );
+
+extern void gl_clip_interp_tex( struct vertex_buffer *VB, 
+                                GLuint dst, GLfloat t, GLuint in, GLuint out );
+
+extern void gl_clip_interp_color( struct vertex_buffer *VB,
+                                GLuint dst, GLfloat t, GLuint in, GLuint out );
+
+extern void gl_clip_interp_none( struct vertex_buffer *VB,
+                                GLuint dst, GLfloat t, GLuint in, GLuint out );
+
+
+extern void gl_update_userclip( GLcontext *ctx );
+
+extern void gl_update_clipmask( GLcontext *ctx );
+
+#endif