SDL  2.0
SDL_cocoaopengles.m
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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_COCOA && SDL_VIDEO_OPENGL_EGL
24 
25 #include "SDL_cocoavideo.h"
26 #include "SDL_cocoaopengles.h"
27 #include "SDL_cocoaopengl.h"
28 #include "SDL_log.h"
29 
30 /* EGL implementation of SDL OpenGL support */
31 
32 int
33 Cocoa_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_CGL
38  Cocoa_GLES_UnloadLibrary(_this);
39  _this->GL_LoadLibrary = Cocoa_GL_LoadLibrary;
40  _this->GL_GetProcAddress = Cocoa_GL_GetProcAddress;
41  _this->GL_UnloadLibrary = Cocoa_GL_UnloadLibrary;
42  _this->GL_CreateContext = Cocoa_GL_CreateContext;
43  _this->GL_MakeCurrent = Cocoa_GL_MakeCurrent;
44  _this->GL_SetSwapInterval = Cocoa_GL_SetSwapInterval;
45  _this->GL_GetSwapInterval = Cocoa_GL_GetSwapInterval;
46  _this->GL_SwapWindow = Cocoa_GL_SwapWindow;
47  _this->GL_DeleteContext = Cocoa_GL_DeleteContext;
48  return Cocoa_GL_LoadLibrary(_this, path);
49 #else
50  return SDL_SetError("SDL not configured with OpenGL/CGL 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 
62 Cocoa_GLES_CreateContext(_THIS, SDL_Window * window)
63 {
66 
69  /* Switch to CGL based functions */
70  Cocoa_GLES_UnloadLibrary(_this);
71  _this->GL_LoadLibrary = Cocoa_GL_LoadLibrary;
72  _this->GL_GetProcAddress = Cocoa_GL_GetProcAddress;
73  _this->GL_UnloadLibrary = Cocoa_GL_UnloadLibrary;
74  _this->GL_CreateContext = Cocoa_GL_CreateContext;
75  _this->GL_MakeCurrent = Cocoa_GL_MakeCurrent;
76  _this->GL_SetSwapInterval = Cocoa_GL_SetSwapInterval;
77  _this->GL_GetSwapInterval = Cocoa_GL_GetSwapInterval;
78  _this->GL_SwapWindow = Cocoa_GL_SwapWindow;
79  _this->GL_DeleteContext = Cocoa_GL_DeleteContext;
80 
81  if (Cocoa_GL_LoadLibrary(_this, NULL) != 0) {
82  return NULL;
83  }
84 
85  return Cocoa_GL_CreateContext(_this, window);
86  }
87 #endif
88 
89  context = SDL_EGL_CreateContext(_this, data->egl_surface);
90  return context;
91 }
92 
93 void
94 Cocoa_GLES_DeleteContext(_THIS, SDL_GLContext context)
95 {
96  SDL_EGL_DeleteContext(_this, context);
97  Cocoa_GLES_UnloadLibrary(_this);
98 }
99 
100 SDL_EGL_SwapWindow_impl(Cocoa)
101 SDL_EGL_MakeCurrent_impl(Cocoa)
102 
103 int
104 Cocoa_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();
109  SDL_GLContext current_ctx = SDL_GL_GetCurrentContext();
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  NSView* v = windowdata->nswindow.contentView;
121  windowdata->egl_surface = SDL_EGL_CreateSurface(_this, (NativeWindowType)[v layer]);
122 
123  if (windowdata->egl_surface == EGL_NO_SURFACE) {
124  return SDL_SetError("Could not create GLES window surface");
125  }
126 
127  return Cocoa_GLES_MakeCurrent(_this, current_win, current_ctx);
128 }
129 
130 #endif /* SDL_VIDEO_DRIVER_COCOA && SDL_VIDEO_OPENGL_EGL */
131 
132 /* vi: set ts=4 sw=4 expandtab: */
const GLdouble * v
Definition: SDL_opengl.h:2064
#define EGL_NO_SURFACE
Definition: egl.h:100
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
GLenum GLuint GLint GLint layer
int(* GL_LoadLibrary)(_THIS, const char *path)
Definition: SDL_sysvideo.h:254
#define EGL_DEFAULT_DISPLAY
Definition: egl.h:227
static SDL_VideoDevice * _this
Definition: SDL_video.c:121
EGLNativeWindowType NativeWindowType
Definition: eglplatform.h:112
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
int(* GL_MakeCurrent)(_THIS, SDL_Window *window, SDL_GLContext context)
Definition: SDL_sysvideo.h:258
NSWindow * nswindow
#define SDL_VIDEO_OPENGL_CGL
void(* GL_UnloadLibrary)(_THIS)
Definition: SDL_sysvideo.h:256
#define NULL
Definition: begin_code.h:164
#define SDL_GL_GetCurrentContext
#define SDL_SetError
#define SDL_GL_GetCurrentWindow
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
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
void *(* GL_GetProcAddress)(_THIS, const char *proc)
Definition: SDL_sysvideo.h:255
EGLSurface egl_surface