SDL  2.0
SDL_offscreenwindow.c
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1 /*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2020 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 
22 #include "../../SDL_internal.h"
23 
24 #if SDL_VIDEO_DRIVER_OFFSCREEN
25 
26 #include "../SDL_egl_c.h"
27 #include "../SDL_sysvideo.h"
28 
29 #include "SDL_offscreenwindow.h"
30 
31 int
33 {
34  OFFSCREEN_Window* offscreen_window = SDL_calloc(1, sizeof(OFFSCREEN_Window));
35 
36  if (!offscreen_window) {
37  return SDL_OutOfMemory();
38  }
39 
40  window->driverdata = offscreen_window;
41 
42  if (window->x == SDL_WINDOWPOS_UNDEFINED) {
43  window->x = 0;
44  }
45 
46  if (window->y == SDL_WINDOWPOS_UNDEFINED) {
47  window->y = 0;
48  }
49 
50  offscreen_window->sdl_window = window;
51 
52  if (window->flags & SDL_WINDOW_OPENGL) {
53 
54  if (!_this->egl_data) {
55  return SDL_SetError("Cannot create an OPENGL window invalid egl_data");
56  }
57 
58  offscreen_window->egl_surface = SDL_EGL_CreateOffscreenSurface(_this, window->w, window->h);
59 
60  if (offscreen_window->egl_surface == EGL_NO_SURFACE) {
61  return SDL_SetError("Failed to created an offscreen surface (EGL display: %p)",
62  _this->egl_data->egl_display);
63  }
64  }
65  else {
66  offscreen_window->egl_surface = EGL_NO_SURFACE;
67  }
68 
69  return 0;
70 }
71 
72 void
74 {
75  OFFSCREEN_Window* offscreen_window = window->driverdata;
76 
77  if (offscreen_window) {
78  SDL_EGL_DestroySurface(_this, offscreen_window->egl_surface);
79  SDL_free(offscreen_window);
80  }
81 
82  window->driverdata = NULL;
83 }
84 
85 #endif /* SDL_VIDEO_DRIVER_OFFSCREEN */
86 
87 /* vi: set ts=4 sw=4 expandtab: */
OFFSCREEN_CreateWindow
int OFFSCREEN_CreateWindow(_THIS, SDL_Window *window)
OFFSCREEN_Window::sdl_window
SDL_Window * sdl_window
Definition: SDL_offscreenwindow.h:31
NULL
#define NULL
Definition: begin_code.h:167
SDL_offscreenwindow.h
SDL_WINDOW_OPENGL
@ SDL_WINDOW_OPENGL
Definition: SDL_video.h:100
SDL_WINDOWPOS_UNDEFINED
#define SDL_WINDOWPOS_UNDEFINED
Definition: SDL_video.h:129
SDL_Window
The type used to identify a window.
Definition: SDL_sysvideo.h:74
_this
static SDL_VideoDevice * _this
Definition: SDL_video.c:121
window
EGLSurface EGLNativeWindowType * window
Definition: eglext.h:1025
EGL_NO_SURFACE
#define EGL_NO_SURFACE
Definition: egl.h:100
SDL_free
#define SDL_free
Definition: SDL_dynapi_overrides.h:377
OFFSCREEN_Window
Definition: SDL_offscreenwindow.h:30
_THIS
#define _THIS
Definition: SDL_alsa_audio.h:31
OFFSCREEN_DestroyWindow
void OFFSCREEN_DestroyWindow(_THIS, SDL_Window *window)
SDL_OutOfMemory
#define SDL_OutOfMemory()
Definition: SDL_error.h:52
SDL_calloc
#define SDL_calloc
Definition: SDL_dynapi_overrides.h:375
SDL_SetError
#define SDL_SetError
Definition: SDL_dynapi_overrides.h:30
OFFSCREEN_Window::egl_surface
EGLSurface egl_surface
Definition: SDL_offscreenwindow.h:32