SDL  2.0
SDL_x11opengles.c
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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_X11 && SDL_VIDEO_OPENGL_EGL
24 
25 #include "SDL_x11video.h"
26 #include "SDL_x11opengles.h"
27 #include "SDL_x11opengl.h"
28 
29 /* EGL implementation of SDL OpenGL support */
30 
31 int
32 X11_GLES_LoadLibrary(_THIS, const char *path)
33 {
35 
36  /* If the profile requested is not GL ES, switch over to X11_GL functions */
38  #if SDL_VIDEO_OPENGL_GLX
39  X11_GLES_UnloadLibrary(_this);
40  _this->GL_LoadLibrary = X11_GL_LoadLibrary;
41  _this->GL_GetProcAddress = X11_GL_GetProcAddress;
42  _this->GL_UnloadLibrary = X11_GL_UnloadLibrary;
43  _this->GL_CreateContext = X11_GL_CreateContext;
44  _this->GL_MakeCurrent = X11_GL_MakeCurrent;
45  _this->GL_SetSwapInterval = X11_GL_SetSwapInterval;
46  _this->GL_GetSwapInterval = X11_GL_GetSwapInterval;
47  _this->GL_SwapWindow = X11_GL_SwapWindow;
48  _this->GL_DeleteContext = X11_GL_DeleteContext;
49  return X11_GL_LoadLibrary(_this, path);
50  #else
51  return SDL_SetError("SDL not configured with OpenGL/GLX support");
52  #endif
53  }
54 
55  return SDL_EGL_LoadLibrary(_this, path, (NativeDisplayType) data->display, 0);
56 }
57 
58 XVisualInfo *
59 X11_GLES_GetVisual(_THIS, Display * display, int screen)
60 {
61 
62  XVisualInfo *egl_visualinfo = NULL;
63  EGLint visual_id;
64  XVisualInfo vi_in;
65  int out_count;
66 
67  if (!_this->egl_data) {
68  /* The EGL library wasn't loaded, SDL_GetError() should have info */
69  return NULL;
70  }
71 
72  if (_this->egl_data->eglGetConfigAttrib(_this->egl_data->egl_display,
73  _this->egl_data->egl_config,
75  &visual_id) == EGL_FALSE || !visual_id) {
76  /* Use the default visual when all else fails */
77  vi_in.screen = screen;
78  egl_visualinfo = X11_XGetVisualInfo(display,
79  VisualScreenMask,
80  &vi_in, &out_count);
81  } else {
82  vi_in.screen = screen;
83  vi_in.visualid = visual_id;
84  egl_visualinfo = X11_XGetVisualInfo(display, VisualScreenMask | VisualIDMask, &vi_in, &out_count);
85  }
86 
87  return egl_visualinfo;
88 }
89 
91 X11_GLES_CreateContext(_THIS, SDL_Window * window)
92 {
94  SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
95  Display *display = data->videodata->display;
96 
97  X11_XSync(display, False);
98  context = SDL_EGL_CreateContext(_this, data->egl_surface);
99  X11_XSync(display, False);
100 
101  return context;
102 }
103 
104 SDL_EGL_SwapWindow_impl(X11)
105 SDL_EGL_MakeCurrent_impl(X11)
106 
107 #endif /* SDL_VIDEO_DRIVER_X11 && SDL_VIDEO_OPENGL_EGL */
108 
109 /* vi: set ts=4 sw=4 expandtab: */
struct wl_display * display
int(* GL_SetSwapInterval)(_THIS, int interval)
Definition: SDL_sysvideo.h:260
static screen_context_t context
Definition: video.c:25
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1974
int(* GL_LoadLibrary)(_THIS, const char *path)
Definition: SDL_sysvideo.h:254
#define EGL_NATIVE_VISUAL_ID
Definition: egl.h:93
static SDL_VideoDevice * _this
Definition: SDL_video.c:121
void * SDL_GLContext
An opaque handle to an OpenGL context.
Definition: SDL_video.h:175
SDL_GLContext(* GL_CreateContext)(_THIS, SDL_Window *window)
Definition: SDL_sysvideo.h:257
#define _THIS
struct SDL_VideoData * videodata
int(* GL_MakeCurrent)(_THIS, SDL_Window *window, SDL_GLContext context)
Definition: SDL_sysvideo.h:258
khronos_int32_t EGLint
Definition: eglplatform.h:122
#define EGL_FALSE
Definition: egl.h:84
void(* GL_UnloadLibrary)(_THIS)
Definition: SDL_sysvideo.h:256
#define NULL
Definition: begin_code.h:164
#define SDL_SetError
EGLSurface EGLNativeWindowType * window
Definition: eglext.h:1025
int(* GL_SwapWindow)(_THIS, SDL_Window *window)
Definition: SDL_sysvideo.h:262
The type used to identify a window.
Definition: SDL_sysvideo.h:73
EGLNativeDisplayType NativeDisplayType
Definition: eglplatform.h:110
GLsizei const GLchar *const * path
struct SDL_VideoDevice::@34 gl_config
void * driverdata
Definition: SDL_sysvideo.h:111
void(* GL_DeleteContext)(_THIS, SDL_GLContext context)
Definition: SDL_sysvideo.h:263
int(* GL_GetSwapInterval)(_THIS)
Definition: SDL_sysvideo.h:261
SDL_Renderer * screen
void *(* GL_GetProcAddress)(_THIS, const char *proc)
Definition: SDL_sysvideo.h:255
EGLSurface egl_surface