SDL 2.0
SDL_windowsopengles.c
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1/*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2019 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
32int
33WIN_GLES_LoadLibrary(_THIS, const char *path) {
34
35 /* If the profile requested is not GL ES, switch over to WIN_GL functions */
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, 0);
56 }
57
58 return 0;
59}
60
62WIN_GLES_CreateContext(_THIS, SDL_Window * window)
63{
65 SDL_WindowData *data = (SDL_WindowData *)window->driverdata;
66
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
93void
94WIN_GLES_DeleteContext(_THIS, SDL_GLContext context)
95{
96 SDL_EGL_DeleteContext(_this, context);
97 WIN_GLES_UnloadLibrary(_this);
98}
99
100SDL_EGL_SwapWindow_impl(WIN)
101SDL_EGL_MakeCurrent_impl(WIN)
102
103int
104WIN_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();
110
111
112 if (_this->egl_data == NULL) {
113 if (SDL_EGL_LoadLibrary(_this, NULL, EGL_DEFAULT_DISPLAY, 0) < 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#endif /* SDL_VIDEO_DRIVER_WINDOWS && SDL_VIDEO_OPENGL_EGL */
130
131/* vi: set ts=4 sw=4 expandtab: */
#define _THIS
#define SDL_VIDEO_OPENGL_WGL
#define SDL_SetError
#define SDL_GL_GetCurrentWindow
#define SDL_GL_GetCurrentContext
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1974
GLsizei const GLchar *const * path
static SDL_VideoDevice * _this
Definition: SDL_video.c:118
void * SDL_GLContext
An opaque handle to an OpenGL context.
Definition: SDL_video.h:193
@ SDL_GL_CONTEXT_PROFILE_ES
Definition: SDL_video.h:233
#define NULL
Definition: begin_code.h:167
#define EGL_DEFAULT_DISPLAY
Definition: egl.h:227
#define EGL_NO_SURFACE
Definition: egl.h:100
EGLSurface EGLNativeWindowType * window
Definition: eglext.h:1025
EGLNativeWindowType NativeWindowType
Definition: eglplatform.h:112
void(* GL_DeleteContext)(_THIS, SDL_GLContext context)
Definition: SDL_sysvideo.h:264
int(* GL_MakeCurrent)(_THIS, SDL_Window *window, SDL_GLContext context)
Definition: SDL_sysvideo.h:259
SDL_GLContext(* GL_CreateContext)(_THIS, SDL_Window *window)
Definition: SDL_sysvideo.h:258
int(* GL_SetSwapInterval)(_THIS, int interval)
Definition: SDL_sysvideo.h:261
void(* GL_UnloadLibrary)(_THIS)
Definition: SDL_sysvideo.h:257
int(* GL_GetSwapInterval)(_THIS)
Definition: SDL_sysvideo.h:262
int(* GL_LoadLibrary)(_THIS, const char *path)
Definition: SDL_sysvideo.h:255
int(* GL_SwapWindow)(_THIS, SDL_Window *window)
Definition: SDL_sysvideo.h:263
struct SDL_VideoDevice::@262 gl_config
void *(* GL_GetProcAddress)(_THIS, const char *proc)
Definition: SDL_sysvideo.h:256
EGLSurface egl_surface
The type used to identify a window.
Definition: SDL_sysvideo.h:74
static screen_context_t context
Definition: video.c:25