1 /*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2016 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_WINDOWS && SDL_VIDEO_OPENGL_EGL
24
25 #include "SDL_windowsvideo.h"
26 #include "SDL_windowsopengles.h"
27 #include "SDL_windowsopengl.h"
28 #include "SDL_log.h"
29
30 /* EGL implementation of SDL OpenGL support */
31
32 int
WIN_GLES_LoadLibrary(_THIS,const char * path)33 WIN_GLES_LoadLibrary(_THIS, const char *path) {
34
35 /* If the profile requested is not GL ES, switch over to WIN_GL functions */
36 if (_this->gl_config.profile_mask != SDL_GL_CONTEXT_PROFILE_ES) {
37 #if SDL_VIDEO_OPENGL_WGL
38 WIN_GLES_UnloadLibrary(_this);
39 _this->GL_LoadLibrary = WIN_GL_LoadLibrary;
40 _this->GL_GetProcAddress = WIN_GL_GetProcAddress;
41 _this->GL_UnloadLibrary = WIN_GL_UnloadLibrary;
42 _this->GL_CreateContext = WIN_GL_CreateContext;
43 _this->GL_MakeCurrent = WIN_GL_MakeCurrent;
44 _this->GL_SetSwapInterval = WIN_GL_SetSwapInterval;
45 _this->GL_GetSwapInterval = WIN_GL_GetSwapInterval;
46 _this->GL_SwapWindow = WIN_GL_SwapWindow;
47 _this->GL_DeleteContext = WIN_GL_DeleteContext;
48 return WIN_GL_LoadLibrary(_this, path);
49 #else
50 return SDL_SetError("SDL not configured with OpenGL/WGL support");
51 #endif
52 }
53
54 if (_this->egl_data == NULL) {
55 return SDL_EGL_LoadLibrary(_this, NULL, EGL_DEFAULT_DISPLAY);
56 }
57
58 return 0;
59 }
60
61 SDL_GLContext
WIN_GLES_CreateContext(_THIS,SDL_Window * window)62 WIN_GLES_CreateContext(_THIS, SDL_Window * window)
63 {
64 SDL_GLContext context;
65 SDL_WindowData *data = (SDL_WindowData *)window->driverdata;
66
67 #if SDL_VIDEO_OPENGL_WGL
68 if (_this->gl_config.profile_mask != SDL_GL_CONTEXT_PROFILE_ES) {
69 /* Switch to WGL based functions */
70 WIN_GLES_UnloadLibrary(_this);
71 _this->GL_LoadLibrary = WIN_GL_LoadLibrary;
72 _this->GL_GetProcAddress = WIN_GL_GetProcAddress;
73 _this->GL_UnloadLibrary = WIN_GL_UnloadLibrary;
74 _this->GL_CreateContext = WIN_GL_CreateContext;
75 _this->GL_MakeCurrent = WIN_GL_MakeCurrent;
76 _this->GL_SetSwapInterval = WIN_GL_SetSwapInterval;
77 _this->GL_GetSwapInterval = WIN_GL_GetSwapInterval;
78 _this->GL_SwapWindow = WIN_GL_SwapWindow;
79 _this->GL_DeleteContext = WIN_GL_DeleteContext;
80
81 if (WIN_GL_LoadLibrary(_this, NULL) != 0) {
82 return NULL;
83 }
84
85 return WIN_GL_CreateContext(_this, window);
86 }
87 #endif
88
89 context = SDL_EGL_CreateContext(_this, data->egl_surface);
90 return context;
91 }
92
93 void
WIN_GLES_DeleteContext(_THIS,SDL_GLContext context)94 WIN_GLES_DeleteContext(_THIS, SDL_GLContext context)
95 {
96 SDL_EGL_DeleteContext(_this, context);
97 WIN_GLES_UnloadLibrary(_this);
98 }
99
100 SDL_EGL_SwapWindow_impl(WIN)
SDL_EGL_MakeCurrent_impl(WIN)101 SDL_EGL_MakeCurrent_impl(WIN)
102
103 int
104 WIN_GLES_SetupWindow(_THIS, SDL_Window * window)
105 {
106 /* The current context is lost in here; save it and reset it. */
107 SDL_WindowData *windowdata = (SDL_WindowData *) window->driverdata;
108 SDL_Window *current_win = SDL_GL_GetCurrentWindow();
109 SDL_GLContext current_ctx = SDL_GL_GetCurrentContext();
110
111
112 if (_this->egl_data == NULL) {
113 if (SDL_EGL_LoadLibrary(_this, NULL, EGL_DEFAULT_DISPLAY) < 0) {
114 SDL_EGL_UnloadLibrary(_this);
115 return -1;
116 }
117 }
118
119 /* Create the GLES window surface */
120 windowdata->egl_surface = SDL_EGL_CreateSurface(_this, (NativeWindowType)windowdata->hwnd);
121
122 if (windowdata->egl_surface == EGL_NO_SURFACE) {
123 return SDL_SetError("Could not create GLES window surface");
124 }
125
126 return WIN_GLES_MakeCurrent(_this, current_win, current_ctx);
127 }
128
129 int
WIN_GLES_SetSwapInterval(_THIS,int interval)130 WIN_GLES_SetSwapInterval(_THIS, int interval)
131 {
132 /* FIXME: This should call SDL_EGL_SetSwapInterval, but ANGLE has a bug that prevents this
133 * from working if we do (the window contents freeze and don't swap properly). So, we ignore
134 * the request for now.
135 */
136 SDL_Log("WARNING: Ignoring SDL_GL_SetSwapInterval call due to ANGLE bug");
137 return 0;
138 }
139
140 #endif /* SDL_VIDEO_DRIVER_WINDOWS && SDL_VIDEO_OPENGL_EGL */
141
142 /* vi: set ts=4 sw=4 expandtab: */
143