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annotate DPF-Prymula-audioplugins/dpf/dgl/src/pugl-upstream/include/pugl/gl.h @ 3:84e66ea83026

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DPF-Prymula-audioplugins-0.231015-2
author prymula <prymula76@outlook.com>
date Mon, 16 Oct 2023 21:53:34 +0200
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1 // Copyright 2012-2020 David Robillard <d@drobilla.net>
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2 // SPDX-License-Identifier: ISC
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3
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4 #ifndef PUGL_GL_H
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5 #define PUGL_GL_H
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6
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7 #include "pugl/pugl.h"
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8
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9 // IWYU pragma: begin_exports
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10
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11 /* Unfortunately, GL includes vary across platforms, so include them here to
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12 enable pure portable programs. */
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13
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14 #ifndef PUGL_NO_INCLUDE_GL_H
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15 # ifdef __APPLE__
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16 # include <OpenGL/gl.h>
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17 # else
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18 # ifdef _WIN32
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19 # include <windows.h>
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20 # endif
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21 # include <GL/gl.h>
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22 # endif
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23 #endif
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24
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25 #ifndef PUGL_NO_INCLUDE_GLU_H
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26 # ifdef __APPLE__
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27 # include <OpenGL/glu.h>
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28 # else
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29 # ifdef _WIN32
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30 # include <windows.h>
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31 # endif
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32 # include <GL/glu.h>
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33 # endif
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34 #endif
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35
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36 // IWYU pragma: end_exports
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37
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38 PUGL_BEGIN_DECLS
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39
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40 /**
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41 @defgroup gl OpenGL
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42 OpenGL graphics support.
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43 @ingroup pugl
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44 @{
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45 */
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46
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47 /**
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48 OpenGL extension function.
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49 */
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50 typedef void (*PuglGlFunc)(void);
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51
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52 /**
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53 Return the address of an OpenGL extension function.
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54 */
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55 PUGL_API
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56 PuglGlFunc
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57 puglGetProcAddress(const char* name);
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58
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59 /**
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60 Enter the OpenGL context.
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61
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62 This can be used to enter the graphics context in unusual situations, for
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63 doing things like loading textures. Note that this must not be used for
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64 drawing, which may only be done while processing an expose event.
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65 */
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66 PUGL_API
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67 PuglStatus
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68 puglEnterContext(PuglView* view);
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69
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70 /**
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71 Leave the OpenGL context.
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72
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73 This must only be called after puglEnterContext().
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74 */
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75 PUGL_API
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76 PuglStatus
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77 puglLeaveContext(PuglView* view);
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78
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79 /**
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80 OpenGL graphics backend.
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81
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82 Pass the returned value to puglSetBackend() to draw to a view with OpenGL.
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83 */
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84 PUGL_CONST_API
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85 const PuglBackend*
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86 puglGlBackend(void);
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87
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88 PUGL_END_DECLS
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89
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90 /**
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91 @}
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92 */
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93
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94 #endif // PUGL_GL_H