1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2020 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_COCOA && SDL_VIDEO_OPENGL_EGL
24
25#include "SDL_cocoavideo.h"
26#include "SDL_cocoaopengles.h"
27#include "SDL_cocoaopengl.h"
28
29/* EGL implementation of SDL OpenGL support */
30
31int
32Cocoa_GLES_LoadLibrary(_THIS, const char *path) {
33
34    /* If the profile requested is not GL ES, switch over to WIN_GL functions  */
35    if (_this->gl_config.profile_mask != SDL_GL_CONTEXT_PROFILE_ES) {
36#if SDL_VIDEO_OPENGL_CGL
37        Cocoa_GLES_UnloadLibrary(_this);
38        _this->GL_LoadLibrary = Cocoa_GL_LoadLibrary;
39        _this->GL_GetProcAddress = Cocoa_GL_GetProcAddress;
40        _this->GL_UnloadLibrary = Cocoa_GL_UnloadLibrary;
41        _this->GL_CreateContext = Cocoa_GL_CreateContext;
42        _this->GL_MakeCurrent = Cocoa_GL_MakeCurrent;
43        _this->GL_SetSwapInterval = Cocoa_GL_SetSwapInterval;
44        _this->GL_GetSwapInterval = Cocoa_GL_GetSwapInterval;
45        _this->GL_SwapWindow = Cocoa_GL_SwapWindow;
46        _this->GL_DeleteContext = Cocoa_GL_DeleteContext;
47        return Cocoa_GL_LoadLibrary(_this, path);
48#else
49        return SDL_SetError("SDL not configured with OpenGL/CGL support");
50#endif
51    }
52
53    if (_this->egl_data == NULL) {
54        return SDL_EGL_LoadLibrary(_this, NULL, EGL_DEFAULT_DISPLAY, 0);
55    }
56
57    return 0;
58}
59
60SDL_GLContext
61Cocoa_GLES_CreateContext(_THIS, SDL_Window * window)
62{
63    SDL_GLContext context;
64    SDL_WindowData *data = (SDL_WindowData *)window->driverdata;
65
66#if SDL_VIDEO_OPENGL_CGL
67    if (_this->gl_config.profile_mask != SDL_GL_CONTEXT_PROFILE_ES) {
68        /* Switch to CGL based functions */
69        Cocoa_GLES_UnloadLibrary(_this);
70        _this->GL_LoadLibrary = Cocoa_GL_LoadLibrary;
71        _this->GL_GetProcAddress = Cocoa_GL_GetProcAddress;
72        _this->GL_UnloadLibrary = Cocoa_GL_UnloadLibrary;
73        _this->GL_CreateContext = Cocoa_GL_CreateContext;
74        _this->GL_MakeCurrent = Cocoa_GL_MakeCurrent;
75        _this->GL_SetSwapInterval = Cocoa_GL_SetSwapInterval;
76        _this->GL_GetSwapInterval = Cocoa_GL_GetSwapInterval;
77        _this->GL_SwapWindow = Cocoa_GL_SwapWindow;
78        _this->GL_DeleteContext = Cocoa_GL_DeleteContext;
79
80        if (Cocoa_GL_LoadLibrary(_this, NULL) != 0) {
81            return NULL;
82        }
83
84        return Cocoa_GL_CreateContext(_this, window);
85    }
86#endif
87
88    context = SDL_EGL_CreateContext(_this, data->egl_surface);
89    return context;
90}
91
92void
93Cocoa_GLES_DeleteContext(_THIS, SDL_GLContext context)
94{
95    SDL_EGL_DeleteContext(_this, context);
96    Cocoa_GLES_UnloadLibrary(_this);
97}
98
99SDL_EGL_SwapWindow_impl(Cocoa)
100SDL_EGL_MakeCurrent_impl(Cocoa)
101
102int
103Cocoa_GLES_SetupWindow(_THIS, SDL_Window * window)
104{
105    /* The current context is lost in here; save it and reset it. */
106    SDL_WindowData *windowdata = (SDL_WindowData *) window->driverdata;
107    SDL_Window *current_win = SDL_GL_GetCurrentWindow();
108    SDL_GLContext current_ctx = SDL_GL_GetCurrentContext();
109
110
111    if (_this->egl_data == NULL) {
112        if (SDL_EGL_LoadLibrary(_this, NULL, EGL_DEFAULT_DISPLAY, 0) < 0) {
113            SDL_EGL_UnloadLibrary(_this);
114            return -1;
115        }
116    }
117
118    /* Create the GLES window surface */
119    NSView* v = windowdata->nswindow.contentView;
120    windowdata->egl_surface = SDL_EGL_CreateSurface(_this, (NativeWindowType)[v layer]);
121
122    if (windowdata->egl_surface == EGL_NO_SURFACE) {
123        return SDL_SetError("Could not create GLES window surface");
124    }
125
126    return Cocoa_GLES_MakeCurrent(_this, current_win, current_ctx);
127}
128
129#endif /* SDL_VIDEO_DRIVER_COCOA && SDL_VIDEO_OPENGL_EGL */
130
131/* vi: set ts=4 sw=4 expandtab: */
132