SDL  2.0
SDL_waylandopengles.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_WAYLAND && SDL_VIDEO_OPENGL_EGL
24 
25 #include "../SDL_sysvideo.h"
26 #include "../../events/SDL_windowevents_c.h"
27 #include "SDL_waylandvideo.h"
28 #include "SDL_waylandopengles.h"
29 #include "SDL_waylandwindow.h"
30 #include "SDL_waylandevents_c.h"
31 #include "SDL_waylanddyn.h"
32 
33 #include "xdg-shell-client-protocol.h"
34 #include "xdg-shell-unstable-v6-client-protocol.h"
35 
36 /* EGL implementation of SDL OpenGL ES support */
37 
38 int
39 Wayland_GLES_LoadLibrary(_THIS, const char *path) {
40  int ret;
42 
43  ret = SDL_EGL_LoadLibrary(_this, path, (NativeDisplayType) data->display, 0);
44 
46  WAYLAND_wl_display_flush(data->display);
47 
48  return ret;
49 }
50 
51 
54 {
56  context = SDL_EGL_CreateContext(_this, ((SDL_WindowData *) window->driverdata)->egl_surface);
57  WAYLAND_wl_display_flush( ((SDL_VideoData*)_this->driverdata)->display );
58 
59  return context;
60 }
61 
62 int
64 {
65  SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
66  struct wl_region *region;
67 
68  if (SDL_EGL_SwapBuffers(_this, data->egl_surface) < 0) {
69  return -1;
70  }
71 
72  // Wayland-EGL forbids drawing calls in-between SwapBuffers and wl_egl_window_resize
73  if (data->resize.pending) {
74  if (data->scale_factor != data->resize.scale_factor) {
75  window->w = 0;
76  window->h = 0;
77  }
79  window->w = data->resize.width;
80  window->h = data->resize.height;
81  data->scale_factor = data->resize.scale_factor;
82  wl_surface_set_buffer_scale(data->surface, data->scale_factor);
83  WAYLAND_wl_egl_window_resize(data->egl_window, window->w * data->scale_factor, window->h * data->scale_factor, 0, 0);
84 
85  if (data->resize.configure) {
86  if (data->waylandData->shell.xdg) {
87  xdg_surface_ack_configure(data->shell_surface.xdg.surface, data->resize.serial);
88  } else if (data->waylandData->shell.zxdg) {
89  zxdg_surface_v6_ack_configure(data->shell_surface.zxdg.surface, data->resize.serial);
90  }
91  data->resize.configure = SDL_FALSE;
92  }
93 
94  region = wl_compositor_create_region(data->waylandData->compositor);
95  wl_region_add(region, 0, 0, window->w, window->h);
96  wl_surface_set_opaque_region(data->surface, region);
97  wl_region_destroy(region);
98 
99  data->resize.pending = SDL_FALSE;
100  }
101 
102  WAYLAND_wl_display_flush( data->waylandData->display );
103 
104  return 0;
105 }
106 
107 int
109 {
110  int ret;
111 
112  if (window && context) {
113  ret = SDL_EGL_MakeCurrent(_this, ((SDL_WindowData *) window->driverdata)->egl_surface, context);
114  }
115  else {
116  ret = SDL_EGL_MakeCurrent(_this, NULL, NULL);
117  }
118 
119  WAYLAND_wl_display_flush( ((SDL_VideoData*)_this->driverdata)->display );
120 
121  return ret;
122 }
123 
124 void
125 Wayland_GLES_GetDrawableSize(_THIS, SDL_Window * window, int * w, int * h)
126 {
128  if (window->driverdata) {
129  data = (SDL_WindowData *) window->driverdata;
130 
131  if (w) {
132  *w = window->w * data->scale_factor;
133  }
134 
135  if (h) {
136  *h = window->h * data->scale_factor;
137  }
138  }
139 }
140 
141 void
143 {
144  SDL_EGL_DeleteContext(_this, context);
145  WAYLAND_wl_display_flush( ((SDL_VideoData*)_this->driverdata)->display );
146 }
147 
148 #endif /* SDL_VIDEO_DRIVER_WAYLAND && SDL_VIDEO_OPENGL_EGL */
149 
150 /* vi: set ts=4 sw=4 expandtab: */
struct SDL_VideoData::@264 shell
union SDL_WindowData::@267 shell_surface
struct zxdg_surface_v6 * surface
struct xdg_wm_base * xdg
struct wl_display * display
void Wayland_GLES_DeleteContext(_THIS, SDL_GLContext context)
GLfloat GLfloat GLfloat GLfloat h
static screen_context_t context
Definition: video.c:25
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1974
struct SDL_WindowData::@268 resize
int SDL_SendWindowEvent(SDL_Window *window, Uint8 windowevent, int data1, int data2)
SDL_Surface * surface
SDL_GLContext Wayland_GLES_CreateContext(_THIS, SDL_Window *window)
static SDL_VideoDevice * _this
Definition: SDL_video.c:118
SDL_xdg_shell_surface xdg
void * SDL_GLContext
An opaque handle to an OpenGL context.
Definition: SDL_video.h:193
#define _THIS
SDL_VideoData * waylandData
GLubyte GLubyte GLubyte GLubyte w
int Wayland_GLES_MakeCurrent(_THIS, SDL_Window *window, SDL_GLContext context)
int Wayland_GLES_SwapWindow(_THIS, SDL_Window *window)
#define NULL
Definition: begin_code.h:167
void Wayland_GLES_GetDrawableSize(_THIS, SDL_Window *window, int *w, int *h)
struct wl_compositor * compositor
SDL_zxdg_shell_surface zxdg
void Wayland_PumpEvents(_THIS)
EGLSurface EGLNativeWindowType * window
Definition: eglext.h:1025
The type used to identify a window.
Definition: SDL_sysvideo.h:73
struct xdg_surface * surface
struct zxdg_shell_v6 * zxdg
EGLNativeDisplayType NativeDisplayType
Definition: eglplatform.h:110
GLsizei const GLchar *const * path
void * driverdata
Definition: SDL_sysvideo.h:111
int Wayland_GLES_LoadLibrary(_THIS, const char *path)
EGLSurface egl_surface
struct wl_egl_window * egl_window