OpenGL编程指南（原书第六版） 程序源代码

/* * (c) Copyright 1993, Silicon Graphics, Inc. * ALL RIGHTS RESERVED * Permission to use, copy, modify, and distribute this software for * any purpose and without fee is hereby granted, provided that the above * copyright notice appear in all copies and that both the copyright notice * and this permission notice appear in supporting documentation, and that * the name of Silicon Graphics, Inc. not be used in advertising * or publicity pertaining to distribution of the software without specific, * written prior permission. * * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS" * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE, * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR * FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON * GRAPHICS, INC. 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Shoreline Blvd., Mountain View, CA 94039-7311. * * OpenGL(TM) is a trademark of Silicon Graphics, Inc. */ #include "tk.h" enum { FONT_BEGIN = 1, FONT_NEXT, FONT_END, FONT_ADVANCE }; #define MAX_STROKES 256 #define END_OF_LIST 256 #define STROKE_SCALE 1.71 #define OUTLINE_SCALE 0.023 #define FILLED_SCALE 0.023 GLint strokeFont[][1+MAX_STROKES*3] = { { 1, FONT_BEGIN, 0, 4, FONT_NEXT, 2, 2, FONT_END, 4, 4, FONT_BEGIN, 2, 8, FONT_END, 2, 2, FONT_ADVANCE, 6, 0 }, { 2, FONT_BEGIN, 0, 3, FONT_NEXT, 0, 5, FONT_NEXT, 1, 6, FONT_NEXT, 2, 6, FONT_NEXT, 3, 5, FONT_END, 4, 6, FONT_BEGIN, 3, 5, FONT_NEXT, 3, 3, FONT_END, 4, 2, FONT_BEGIN, 3, 3, FONT_NEXT, 2, 2, FONT_NEXT, 1, 2, FONT_END, 0, 3, FONT_ADVANCE, 6, 0 }, { 3, FONT_BEGIN, 0, 0, FONT_NEXT, 1, 1, FONT_NEXT, 1, 5, FONT_NEXT, 2, 6, FONT_NEXT, 4, 6, FONT_NEXT, 5, 5, FONT_NEXT, 4, 4, FONT_END, 1, 4, FONT_BEGIN, 4, 4, FONT_NEXT, 5, 3, FONT_NEXT, 4, 2, FONT_END, 1, 2, FONT_ADVANCE, 7, 0 }, { 4, FONT_BEGIN, 0, 4, FONT_NEXT, 2, 6, FONT_END, 4, 4, FONT_ADVANCE, 6, 0 }, { 5, FONT_BEGIN, 0, 5, FONT_NEXT, 4, 5, FONT_END, 4, 4, FONT_ADVANCE, 6, 0 }, { 6, FONT_BEGIN, 1, 4, FONT_END, 3, 4, FONT_BEGIN, 3, 6, FONT_NEXT, 2, 6, FONT_NEXT, 1, 5, FONT_NEXT, 1, 3, FONT_NEXT, 2, 2, FONT_END, 3, 2, FONT_ADVANCE, 6, 0 }, { 7, FONT_BEGIN, 1, 2, FONT_END, 1, 6, FONT_BEGIN, 0, 6, FONT_END, 4, 6, FONT_BEGIN, 3, 6, FONT_END, 3, 2, FONT_ADVANCE, 6, 0 }, { 8, FONT_BEGIN, 0, 2, FONT_END, 2, 4, FONT_BEGIN, 0, 7, FONT_NEXT, 0, 6, FONT_END, 4, 2, FONT_ADVANCE, 6, 0 }, { 10, FONT_ADVANCE, 0, -9 }, { 11, FONT_BEGIN, 0, 2, FONT_NEXT, 1, 1, FONT_NEXT, 2, 2, FONT_NEXT, 2, 7, FONT_NEXT, 3, 8, FONT_END, 4, 7, FONT_ADVANCE, 6, 0 }, { 12, FONT_BEGIN, 0, 3, FONT_END, 4, 3, FONT_BEGIN, 4, 6, FONT_END, 0, 6, FONT_BEGIN, 2, 8, FONT_END, 2, 4, FONT_ADVANCE, 6, 0 }, { 14, FONT_BEGIN, 1, 3, FONT_NEXT, 2, 4, FONT_NEXT, 2, 5, FONT_NEXT, 3, 6, FONT_NEXT, 4, 5, FONT_NEXT, 4, 4, FONT_NEXT, 3, 3, FONT_END, 2, 4, FONT_BEGIN, 2, 5, FONT_NEXT, 1, 6, FONT_NEXT, 0, 5, FONT_NEXT, 0, 4, FONT_END, 1, 3, FONT_ADVANCE, 6, 0 }, { 15, FONT_BEGIN, 0, 3, FONT_NEXT, 0, 4, FONT_NEXT, 1, 5, FONT_NEXT, 3, 5, FONT_NEXT, 4, 4, FONT_NEXT, 4, 6, FONT_NEXT, 2, 8, FONT_END, 1, 8, FONT_BEGIN, 4, 4, FONT_NEXT, 4, 3, FONT_NEXT, 3, 2, FONT_NEXT, 1, 2, FONT_END, 0, 3, FONT_ADVANCE, 6, 0 }, { 16, FONT_BEGIN, 4, 7, FONT_NEXT, 1, 7, FONT_NEXT, 0, 6, FONT_NEXT, 0, 4, FONT_NEXT, 1, 3, FONT_END, 4, 3, FONT_ADVANCE, 6, 0 }, { 17, FONT_BEGIN, 0, 3, FONT_NEXT, 3, 3, FONT_NEXT, 4, 4, FONT_NEXT, 4, 6, FONT_NEXT, 3, 7, FONT_END, 0, 7, FONT_ADVANCE, 6, 0 }, { 18, FONT_BEGIN, 0, 4, FONT_NEXT, 0, 6, FONT_NEXT, 1, 7, FONT_NEXT, 3, 7, FONT_NEXT, 4, 6, FONT_END, 4, 4, FONT_ADVANCE, 6, 0 }, { 19, FONT_BEGIN, 0, 7, FONT_NEXT, 0, 5, FONT_NEXT, 1, 4, FONT_NEXT, 3, 4, FONT_NEXT, 4, 5, FONT_END, 4, 7, FONT_ADVANCE, 6, 0 }, { 20, FONT_BEGIN, 0, 8, FONT_NEXT, 2, 2, FONT_END, 4, 8, FONT_BEGIN, 3, 6, FONT_END, 1, 6, FONT_ADVANCE, 6, 0 }, { 21, FONT_BEGIN, 0, 2, FONT_NEXT, 4, 2, FONT_NEXT, 4, 5, FONT_END, 1, 5, FONT_BEGIN, 0, 8, FONT_NEXT, 4, 8, FONT_END, 4, 5, FONT_ADVANCE, 6, 0 }, { 22, FONT_BEGIN, 0, 4, FONT_NEXT, 0, 6, FONT_NEXT, 1, 7, FONT_NEXT, 3, 7, FONT_NEXT, 4, 6, FONT_NEXT, 4, 4, FONT_NEXT, 3, 3, FONT_NEXT, 1, 3, FONT_END, 0, 4, FONT_BEGIN, 1, 4, FONT_END, 3, 6, FONT_BEGIN, 1, 6, FONT_END, 3, 4, FONT_ADVANCE, 6, 0 }, { 23, FONT_BEGIN, 2, 0, FONT_NEXT, 0, 2, FONT_NEXT, 4, 6, FONT_END, 2, 8, FONT_BEGIN, 0, 6, FONT_END, 4, 6, FONT_BEGIN, 0, 2, FONT_END, 4, 2, FONT_ADVANCE, 6, 0 }, { 24, FONT_BEGIN, 0, 0, FONT_END, 4, 0, FONT_ADVANCE, 6, 0 }, { 25, FONT_BEGIN, 2, 3, FONT_NEXT, 4, 5, FONT_END, 2, 7, FONT_BEGIN, 0, 5, FONT_END, 4, 5, FONT_ADVANCE, 6, 0 }, { 26, FONT_BEGIN, 0, 8, FONT_NEXT, 1, 9, FONT_NEXT, 2, 9, FONT_NEXT, 2, 8, FONT_NEXT, 3, 8, FONT_END, 4, 9, FONT_ADVANCE, 6, 0 }, { 27, FONT_BEGIN, 0, 1, FONT_END, 4, 7, FONT_BEGIN, 4, 5, FONT_END, 0, 5, FONT_BEGIN, 0, 3, FONT_END, 4, 3, FONT_ADVANCE, 6, 1 }, { 28, FONT_BEGIN, 1, 2, FONT_END, 3, 2, FONT_BEGIN, 3, 4, FONT_NEXT, 1, 6, FONT_END, 3, 8, FONT_ADVANCE, 6, 0 }, { 29, FONT_BEGIN, 1, 2, FONT_END, 3, 2, FONT_BEGIN, 1, 4, FONT_NEXT, 3, 6, FONT_END, 1, 8, FONT_ADVANCE, 6, 0 }, { 30, FONT_BEGIN, 0, 3, FONT_END, 4, 3, FONT_BEGIN, 4, 5, FONT_END, 0, 5, FONT_BEGIN, 0, 7, FONT_END, 4, 7, FONT_ADVANCE, 6, 0 }, { 31, FONT_BEGIN, 0, 6, FONT_NEXT, 2, 4, FONT_END, 4, 6, FONT_ADVANCE, 6, 0 }, { 32, FONT_ADVANCE, 6, 0 }, { 33, FONT_BEGIN, 2, 1, FONT_END, 2, 2, FONT_BEGIN, 2, 4, FONT_END, 2, 8, FONT_ADVANCE, 6, 0 }, { 34, FONT_BEGIN, 1, 7, FONT_END, 1, 9, FONT_BEGIN, 3, 9, FONT_END, 3, 7, FONT_ADVANCE, 6, 0 }, { 35, FONT_BEGIN, 1, 2, FONT_END, 1, 7, FONT_BEGIN, 3, 7, FONT_END, 3, 2, FONT_BEGIN, 4, 3, FONT_END, 0, 3, FONT_BEGIN, 0, 6, FONT_END, 4, 6, FONT_ADVANCE, 6, 0 }, { 36, FONT_BEGIN, 2, 1, FONT_END, 2, 9, FONT_BEGIN, 4, 7, FONT_NEXT, 3, 8, FONT_NEXT, 1, 8, FONT_NEXT, 0, 7, FONT_NEXT, 0, 6, FONT_NEXT, 1, 5, FONT_NEXT, 3, 5, FONT_NEXT, 4, 4, FONT_NEXT, 4, 2, FONT_NEXT, 3, 1, FONT_NEXT, 1, 1, FONT_END, 0, 2, FONT_ADVANCE, 6, -1 }, { 37, FONT_BEGIN, 0, 2, FONT_NEXT, 0, 3, FONT_NEXT, 4, 7, FONT_END, 4, 8, FONT_BEGIN, 1, 8, FONT_NEXT, 0, 8, FONT_NEXT, 0, 7, FONT_NEXT, 1,