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1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2018 Sam Lantinga <[email protected]>
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
34extern "C" {
35#endif
36
37
38static SDL_INLINE SDL_BWin *_ToBeWin(SDL_Window *window) {
39    return ((SDL_BWin*)(window->driverdata));
40}
41
42static SDL_INLINE SDL_BApp *_GetBeApp() {
43    return ((SDL_BApp*)be_app);
44}
45
46/* Passing a NULL path means load pointers from the application */
47int HAIKU_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;
58            _this->gl_config.driver_loaded = 1;
59            SDL_strlcpy(_this->gl_config.driver_path, "libGL.so",
60                    SDL_arraysize(_this->gl_config.driver_path));
61        }
62    }
63    return 0;
64}
65
66void *HAIKU_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
89int HAIKU_GL_SwapWindow(_THIS, SDL_Window * window) {
90    _ToBeWin(window)->SwapBuffers();
91    return 0;
92}
93
94int HAIKU_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
101SDL_GLContext HAIKU_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    }
112    if (_this->gl_config.stencil_size) {
113        gl_flags |= BGL_STENCIL;
114    }
115    if (_this->gl_config.double_buffer) {
116        gl_flags |= BGL_DOUBLE;
117    } else {
118        gl_flags |= BGL_SINGLE;
119    }
120    if (_this->gl_config.accum_red_size ||
121            _this->gl_config.accum_green_size ||
122            _this->gl_config.accum_blue_size ||
123            _this->gl_config.accum_alpha_size) {
124        gl_flags |= BGL_ACCUM;
125    }
126    bwin->CreateGLView(gl_flags);
127    return (SDL_GLContext)(bwin);
128}
129
130void HAIKU_GL_DeleteContext(_THIS, SDL_GLContext context) {
131    /* Currently, automatically unlocks the view */
132    ((SDL_BWin*)context)->RemoveGLView();
133}
134
135
136int HAIKU_GL_SetSwapInterval(_THIS, int interval) {
137    /* TODO: Implement this, if necessary? */
138    return SDL_Unsupported();
139}
140
141int HAIKU_GL_GetSwapInterval(_THIS) {
142    /* TODO: Implement this, if necessary? */
143    return 0;
144}
145
146
147void HAIKU_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. */
155void HAIKU_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: */
177
[FILE END]
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