1/*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2025 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 defined(SDL_VIDEO_DRIVER_X11) && defined(SDL_VIDEO_OPENGL_EGL)
24
25#include "SDL_x11video.h"
26#include "SDL_x11opengles.h"
27#include "SDL_x11opengl.h"
28#include "SDL_x11xsync.h"
29
30// EGL implementation of SDL OpenGL support
31
32bool X11_GLES_LoadLibrary(SDL_VideoDevice *_this, const char *path)
33{
34 SDL_VideoData *data = _this->internal;
35
36 // If the profile requested is not GL ES, switch over to X11_GL functions
37 if ((_this->gl_config.profile_mask != SDL_GL_CONTEXT_PROFILE_ES) &&
38 !SDL_GetHintBoolean(SDL_HINT_VIDEO_FORCE_EGL, false)) {
39#ifdef SDL_VIDEO_OPENGL_GLX
40 X11_GLES_UnloadLibrary(_this);
41 _this->GL_LoadLibrary = X11_GL_LoadLibrary;
42 _this->GL_GetProcAddress = X11_GL_GetProcAddress;
43 _this->GL_UnloadLibrary = X11_GL_UnloadLibrary;
44 _this->GL_CreateContext = X11_GL_CreateContext;
45 _this->GL_MakeCurrent = X11_GL_MakeCurrent;
46 _this->GL_SetSwapInterval = X11_GL_SetSwapInterval;
47 _this->GL_GetSwapInterval = X11_GL_GetSwapInterval;
48 _this->GL_SwapWindow = X11_GL_SwapWindow;
49 _this->GL_DestroyContext = X11_GL_DestroyContext;
50 return X11_GL_LoadLibrary(_this, path);
51#else
52 return SDL_SetError("SDL not configured with OpenGL/GLX support");
53#endif
54 }
55
56 return SDL_EGL_LoadLibrary(_this, path, (NativeDisplayType)data->display, _this->gl_config.egl_platform);
57}
58
59XVisualInfo *X11_GLES_GetVisual(SDL_VideoDevice *_this, Display *display, int screen, bool transparent)
60{
61
62 XVisualInfo *egl_visualinfo = NULL;
63 EGLint visual_id = 0;
64 XVisualInfo vi_in;
65 int out_count = 0;
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,
74 EGL_NATIVE_VISUAL_ID,
75 &visual_id) == EGL_FALSE) {
76 visual_id = 0;
77 }
78 if (visual_id != 0) {
79 vi_in.screen = screen;
80 vi_in.visualid = visual_id;
81 egl_visualinfo = X11_XGetVisualInfo(display, VisualScreenMask | VisualIDMask, &vi_in, &out_count);
82 if (transparent && egl_visualinfo) {
83 Uint32 format = X11_GetPixelFormatFromVisualInfo(display, egl_visualinfo);
84 if (!SDL_ISPIXELFORMAT_ALPHA(format)) {
85 // not transparent!
86 X11_XFree(egl_visualinfo);
87 egl_visualinfo = NULL;
88 }
89 }
90 }
91
92 if(!egl_visualinfo) {
93 // Use the default visual when all else fails
94 vi_in.screen = screen;
95 egl_visualinfo = X11_XGetVisualInfo(display,
96 VisualScreenMask,
97 &vi_in, &out_count);
98
99 // Return the first transparent Visual
100 if (transparent) {
101 int i;
102 for (i = 0; i < out_count; i++) {
103 XVisualInfo *v = &egl_visualinfo[i];
104 Uint32 format = X11_GetPixelFormatFromVisualInfo(display, v);
105 if (SDL_ISPIXELFORMAT_ALPHA(format)) { // found!
106 // re-request it to have a copy that can be X11_XFree'ed later
107 vi_in.screen = screen;
108 vi_in.visualid = v->visualid;
109 X11_XFree(egl_visualinfo);
110 egl_visualinfo = X11_XGetVisualInfo(display, VisualScreenMask | VisualIDMask, &vi_in, &out_count);
111 return egl_visualinfo;
112 }
113 }
114 }
115 }
116 return egl_visualinfo;
117}
118
119SDL_GLContext X11_GLES_CreateContext(SDL_VideoDevice *_this, SDL_Window *window)
120{
121 SDL_GLContext context;
122 SDL_WindowData *data = window->internal;
123 Display *display = data->videodata->display;
124
125 X11_XSync(display, False);
126 context = SDL_EGL_CreateContext(_this, data->egl_surface);
127 X11_XSync(display, False);
128
129 return context;
130}
131
132SDL_EGLSurface X11_GLES_GetEGLSurface(SDL_VideoDevice *_this, SDL_Window *window)
133{
134 SDL_WindowData *data = window->internal;
135 return data->egl_surface;
136}
137
138bool X11_GLES_SwapWindow(SDL_VideoDevice *_this, SDL_Window *window)
139{
140 const bool ret = SDL_EGL_SwapBuffers(_this, window->internal->egl_surface); \
141
142#ifdef SDL_VIDEO_DRIVER_X11_XSYNC
143 X11_HandlePresent(window);
144#endif /* SDL_VIDEO_DRIVER_X11_XSYNC */
145
146 return ret;
147}
148
149SDL_EGL_MakeCurrent_impl(X11)
150
151#endif // SDL_VIDEO_DRIVER_X11 && SDL_VIDEO_OPENGL_EGL
152
153