SDL  2.0
SDL_bopengl.cc
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1 /*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
4 
5  This software is provided 'as-is', without any express or implied
6  warranty. In no event will the authors be held liable for any damages
7  arising from the use of this software.
8 
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12 
13  1. The origin of this software must not be misrepresented; you must not
14  claim that you wrote the original software. If you use this software
15  in a product, an acknowledgment in the product documentation would be
16  appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18  misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20 */
21 #include "../../SDL_internal.h"
22 
23 #if SDL_VIDEO_DRIVER_HAIKU && SDL_VIDEO_OPENGL
24 
25 #include "SDL_bopengl.h"
26 
27 #include <unistd.h>
28 #include <KernelKit.h>
29 #include <OpenGLKit.h>
30 #include "SDL_BWin.h"
31 #include "../../main/haiku/SDL_BApp.h"
32 
33 #ifdef __cplusplus
34 extern "C" {
35 #endif
36 
37 
38 static SDL_INLINE SDL_BWin *_ToBeWin(SDL_Window *window) {
39  return ((SDL_BWin*)(window->driverdata));
40 }
41 
42 static SDL_INLINE SDL_BApp *_GetBeApp() {
43  return ((SDL_BApp*)be_app);
44 }
45 
46 /* Passing a NULL path means load pointers from the application */
47 int BE_GL_LoadLibrary(_THIS, const char *path)
48 {
49 /* FIXME: Is this working correctly? */
50  image_info info;
51  int32 cookie = 0;
52  while (get_next_image_info(0, &cookie, &info) == B_OK) {
53  void *location = NULL;
54  if( get_image_symbol(info.id, "glBegin", B_SYMBOL_TYPE_ANY,
55  &location) == B_OK) {
56 
57  _this->gl_config.dll_handle = (void *) (size_t) info.id;
61  }
62  }
63  return 0;
64 }
65 
66 void *BE_GL_GetProcAddress(_THIS, const char *proc)
67 {
68  if (_this->gl_config.dll_handle != NULL) {
69  void *location = NULL;
70  status_t err;
71  if ((err =
72  get_image_symbol((image_id) (size_t) _this->gl_config.dll_handle,
73  proc, B_SYMBOL_TYPE_ANY,
74  &location)) == B_OK) {
75  return location;
76  } else {
77  SDL_SetError("Couldn't find OpenGL symbol");
78  return NULL;
79  }
80  } else {
81  SDL_SetError("OpenGL library not loaded");
82  return NULL;
83  }
84 }
85 
86 
87 
88 
89 int BE_GL_SwapWindow(_THIS, SDL_Window * window) {
90  _ToBeWin(window)->SwapBuffers();
91  return 0;
92 }
93 
94 int BE_GL_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context) {
95  SDL_BWin* win = (SDL_BWin*)context;
96  _GetBeApp()->SetCurrentContext(win ? win->GetGLView() : NULL);
97  return 0;
98 }
99 
100 
101 SDL_GLContext BE_GL_CreateContext(_THIS, SDL_Window * window) {
102  /* FIXME: Not sure what flags should be included here; may want to have
103  most of them */
104  SDL_BWin *bwin = _ToBeWin(window);
105  Uint32 gl_flags = BGL_RGB;
106  if (_this->gl_config.alpha_size) {
107  gl_flags |= BGL_ALPHA;
108  }
109  if (_this->gl_config.depth_size) {
110  gl_flags |= BGL_DEPTH;
111  }
113  gl_flags |= BGL_STENCIL;
114  }
116  gl_flags |= BGL_DOUBLE;
117  } else {
118  gl_flags |= BGL_SINGLE;
119  }
124  gl_flags |= BGL_ACCUM;
125  }
126  bwin->CreateGLView(gl_flags);
127  return (SDL_GLContext)(bwin);
128 }
129 
130 void BE_GL_DeleteContext(_THIS, SDL_GLContext context) {
131  /* Currently, automatically unlocks the view */
132  ((SDL_BWin*)context)->RemoveGLView();
133 }
134 
135 
136 int BE_GL_SetSwapInterval(_THIS, int interval) {
137  /* TODO: Implement this, if necessary? */
138  return SDL_Unsupported();
139 }
140 
141 int BE_GL_GetSwapInterval(_THIS) {
142  /* TODO: Implement this, if necessary? */
143  return 0;
144 }
145 
146 
147 void BE_GL_UnloadLibrary(_THIS) {
148  /* TODO: Implement this, if necessary? */
149 }
150 
151 
152 /* FIXME: This function is meant to clear the OpenGL context when the video
153  mode changes (see SDL_bmodes.cc), but it doesn't seem to help, and is not
154  currently in use. */
155 void BE_GL_RebootContexts(_THIS) {
156  SDL_Window *window = _this->windows;
157  while(window) {
158  SDL_BWin *bwin = _ToBeWin(window);
159  if(bwin->GetGLView()) {
160  bwin->LockLooper();
161  bwin->RemoveGLView();
162  bwin->CreateGLView(bwin->GetGLType());
163  bwin->UnlockLooper();
164  }
165  window = window->next;
166  }
167 }
168 
169 
170 #ifdef __cplusplus
171 }
172 #endif
173 
174 #endif /* SDL_VIDEO_DRIVER_HAIKU && SDL_VIDEO_OPENGL */
175 
176 /* vi: set ts=4 sw=4 expandtab: */
SDL_Window * next
Definition: SDL_sysvideo.h:114
#define SDL_strlcpy
static screen_context_t context
Definition: video.c:25
BGLView * GetGLView()
Definition: SDL_BWin.h:449
uint32_t Uint32
Definition: SDL_stdinc.h:181
Uint32 GetGLType()
Definition: SDL_BWin.h:450
static SDL_VideoDevice * _this
Definition: SDL_video.c:121
void * SDL_GLContext
An opaque handle to an OpenGL context.
Definition: SDL_video.h:175
#define _THIS
GLint location
virtual void RemoveGLView()
Definition: SDL_BWin.h:148
char driver_path[256]
Definition: SDL_sysvideo.h:350
SDL_Window * windows
Definition: SDL_sysvideo.h:313
#define NULL
Definition: begin_code.h:164
#define SDL_SetError
EGLSurface EGLNativeWindowType * window
Definition: eglext.h:1025
The type used to identify a window.
Definition: SDL_sysvideo.h:73
virtual BGLView * CreateGLView(Uint32 gl_flags)
Definition: SDL_BWin.h:132
#define SDL_arraysize(array)
Definition: SDL_stdinc.h:93
#define SDL_INLINE
Definition: begin_code.h:131
GLsizei const GLchar *const * path
struct SDL_VideoDevice::@34 gl_config
void * driverdata
Definition: SDL_sysvideo.h:111
#define SDL_Unsupported()
Definition: SDL_error.h:53