source: git/src/glbitmapfont.h @ 9fcc81a

RELEASE/1.2debug-cidebug-ci-sanitiserswalls-data
Last change on this file since 9fcc81a was 0273042, checked in by Olly Betts <olly@…>, 6 years ago

Eliminate use of gluErrorString

Fixes deprecation warning on macOS.

  • Property mode set to 100644
File size: 2.4 KB
Line 
1//
2//  glbitmapfont.h
3//
4//  Draw text using glBitmap.
5//
6//  Copyright (C) 2011,2013,2014 Olly Betts
7//
8//  This program is free software; you can redistribute it and/or modify
9//  it under the terms of the GNU General Public License as published by
10//  the Free Software Foundation; either version 2 of the License, or
11//  (at your option) any later version.
12//
13//  This program is distributed in the hope that it will be useful,
14//  but WITHOUT ANY WARRANTY; without even the implied warranty of
15//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16//  GNU General Public License for more details.
17//
18//  You should have received a copy of the GNU General Public License
19//  along with this program; if not, write to the Free Software
20//  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
21//
22
23#ifndef GLBITMAPFONT_H_INCLUDED
24#define GLBITMAPFONT_H_INCLUDED
25
26#include "wx.h"
27
28#ifdef HAVE_GL_GL_H
29# include <GL/gl.h>
30#elif defined HAVE_OPENGL_GL_H
31# include <OpenGL/gl.h>
32#endif
33
34class BitmapFont {
35    enum {
36        // The highest character point to generate an OpenGL list for.
37        //
38        // We can't generate a GL list for every Unicode character, so we
39        // generate them for the first BITMAPFONT_MAX_CHAR characters and then
40        // use glBitmap directly to draw other characters if they are needed.
41        //
42        // FIXME: We could perhaps even store strings consisting of only the
43        // first 256 points as ISO8859-1.
44        BITMAPFONT_MAX_CHAR = 256
45    };
46
47    int gllist_base;
48
49    mutable const unsigned char * extra_data;
50
51    mutable int * extra_chars;
52
53    unsigned char char_width[BITMAPFONT_MAX_CHAR];
54
55    void init_extra_chars() const;
56
57    int glyph_width(wxChar ch) const;
58
59    void write_glyph(wxChar ch) const;
60
61    wxString font_file;
62
63  public:
64
65    BitmapFont() : gllist_base(0), extra_data(0), extra_chars(0) { }
66
67    ~BitmapFont();
68
69    bool load(const wxString & font_file);
70
71    // Hard-code for now.
72    int get_font_size() const { return 16; }
73
74    void get_text_extent(const wxChar *s, size_t len, int *width, int *height) const {
75        if (width) {
76            int total_width = 0;
77            while (len--) {
78                int ch = *s++;
79                if (ch < BITMAPFONT_MAX_CHAR)
80                    total_width += char_width[ch];
81                else
82                    total_width += glyph_width(ch);
83            }
84            *width = total_width;
85        }
86        if (height) {
87            *height = get_font_size() + 1;
88        }
89    }
90
91    void write_string(const wxChar *s, size_t len) const;
92};
93
94#endif
Note: See TracBrowser for help on using the repository browser.