FLTK 1.3.4
gl.h
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1 //
2 // "$Id: gl.h 10872 2015-10-21 14:37:27Z manolo $"
3 //
4 // OpenGL header file for the Fast Light Tool Kit (FLTK).
5 //
6 // Copyright 1998-2011 by Bill Spitzak and others.
7 //
8 // You must include this instead of GL/gl.h to get the Microsoft
9 // APIENTRY stuff included (from <windows.h>) prior to the OpenGL
10 // header files.
11 //
12 // This file also provides "missing" OpenGL functions, and
13 // gl_start() and gl_finish() to allow OpenGL to be used in any window
14 //
15 // This library is free software. Distribution and use rights are outlined in
16 // the file "COPYING" which should have been included with this file. If this
17 // file is missing or damaged, see the license at:
18 //
19 // http://www.fltk.org/COPYING.php
20 //
21 // Please report all bugs and problems on the following page:
22 //
23 // http://www.fltk.org/str.php
24 //
25 
42 #ifndef FL_gl_H
43 # define FL_gl_H
44 
45 # include "Enumerations.H" // for color names
46 # ifdef WIN32
47 # include <windows.h>
48 # endif
49 # ifndef APIENTRY
50 # if defined(__CYGWIN__)
51 # define APIENTRY __attribute__ ((__stdcall__))
52 # else
53 # define APIENTRY
54 # endif
55 # endif
56 
57 # ifdef __APPLE__
58 # include <OpenGL/gl.h>
59 # else
60 # include <GL/gl.h>
61 # endif // __APPLE__
62 
63 FL_EXPORT void gl_start();
64 FL_EXPORT void gl_finish();
65 
66 FL_EXPORT void gl_color(Fl_Color i);
68 inline void gl_color(int c) {gl_color((Fl_Color)c);}
69 
70 FL_EXPORT void gl_rect(int x,int y,int w,int h);
75 inline void gl_rectf(int x,int y,int w,int h) {glRecti(x,y,x+w,y+h);}
76 
77 FL_EXPORT void gl_font(int fontid, int size);
78 FL_EXPORT int gl_height();
79 FL_EXPORT int gl_descent();
80 FL_EXPORT double gl_width(const char *);
81 FL_EXPORT double gl_width(const char *, int n);
82 FL_EXPORT double gl_width(uchar);
83 
84 FL_EXPORT void gl_draw(const char*);
85 FL_EXPORT void gl_draw(const char*, int n);
86 FL_EXPORT void gl_draw(const char*, int x, int y);
87 FL_EXPORT void gl_draw(const char*, float x, float y);
88 FL_EXPORT void gl_draw(const char*, int n, int x, int y);
89 FL_EXPORT void gl_draw(const char*, int n, float x, float y);
90 FL_EXPORT void gl_draw(const char*, int x, int y, int w, int h, Fl_Align);
91 FL_EXPORT void gl_measure(const char*, int& x, int& y);
92 #ifdef __APPLE__
93 extern FL_EXPORT void gl_texture_pile_height(int max);
94 extern FL_EXPORT int gl_texture_pile_height();
95 #endif
96 
97 FL_EXPORT void gl_draw_image(const uchar *, int x,int y,int w,int h, int d=3, int ld=0);
98 
99 #endif // !FL_gl_H
100 
101 //
102 // End of "$Id: gl.h 10872 2015-10-21 14:37:27Z manolo $".
103 //
FL_EXPORT void gl_rect(int x, int y, int w, int h)
Outlines the given rectangle with the current color.
Definition: gl_draw.cxx:286
FL_EXPORT double gl_width(const char *)
Returns the width of the string in the current fnt.
Definition: gl_draw.cxx:58
FL_EXPORT void gl_start()
Creates an OpenGL context.
Definition: gl_start.cxx:56
FL_EXPORT void gl_color(Fl_Color i)
Sets the curent OpenGL color to an FLTK color.
Definition: gl_draw.cxx:309
FL_EXPORT void gl_measure(const char *, int &x, int &y)
Measure how wide and tall the string will be when drawn by the gl_draw() function.
Definition: gl_draw.cxx:277
This file contains type definitions and general enumerations.
int gl_texture_pile_height(void)
Returns the current height of the pile of pre-computed string textures.
Definition: gl_draw.cxx:558
void gl_rectf(int x, int y, int w, int h)
Fills the given rectangle with the current color.
Definition: gl.h:75
FL_EXPORT void gl_draw(const char *)
Draws a nul-terminated string in the current font at the current position.
Definition: gl_draw.cxx:239
unsigned int Fl_Color
An FLTK color value; see also Colors.
Definition: Enumerations.H:934
unsigned Fl_Align
FLTK type for alignment control.
Definition: Enumerations.H:828
FL_EXPORT int gl_descent()
Returns the current font's descent.
Definition: gl_draw.cxx:56
FL_EXPORT void gl_font(int fontid, int size)
Sets the current OpenGL font to the same font as calling fl_font()
Definition: gl_draw.cxx:78
FL_EXPORT void gl_finish()
Releases an OpenGL context.
Definition: gl_start.cxx:98
unsigned char uchar
unsigned char
Definition: fl_types.h:30
FL_EXPORT int gl_height()
Returns the current font's height.
Definition: gl_draw.cxx:54