src/video/winrt/SDL_winrtopengles.cpp
author David Ludwig <dludwig@pobox.com>
Mon, 04 Nov 2013 19:54:29 -0500
changeset 8541 0041edb891f3
child 8573 310a523cd32d
permissions -rw-r--r--
WinRT: added experimental OpenGL ES 2.0 support

A port of the ANGLE library (OpenGL ES 2.0 for Direct3D) to WinRT, via https://github.com/stammen/angleproject, is used as a base.

To enable, clone 'angleproject' into the directory one above where SDL/WinRT is, open the file SDL/include/SDL_config_winrt.h, and uncomment the #defines that begin with 'SDL_VIDEO_OPENGL'. From there, apps can create an OpenGL capable SDL_Window via the flag, SDL_WINDOW_OPENGL, and an OpenGL ES 2 context via SDL_GL_CreateContext. The Direct3D 11.1 renderer cannot be used alongside SDL_WINDOW_OPENGL. Only Windows 8/8.1 is supported for now. Shaders may need to be precompiled, in some (all?) cases.
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2013 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_config.h"
    22 
    23 // TODO: WinRT, make this file compile via C code
    24 
    25 #if SDL_VIDEO_DRIVER_WINRT && SDL_VIDEO_OPENGL_EGL
    26 
    27 /* EGL implementation of SDL OpenGL support */
    28 
    29 // TODO, WinRT: Try to include these here, or via something else (rather than redefining key parts of them)
    30 //#include <GLES2/gl2.h>
    31 //#include <EGL/egl.h>
    32 //#include <EGL/eglext.h>
    33 
    34 #include "SDL_winrtvideo_cpp.h"
    35 extern "C" {
    36 #include "SDL_winrtopengles.h"
    37 }
    38 
    39 #define EGL_D3D11_ONLY_DISPLAY_ANGLE ((NativeDisplayType) -3)
    40 
    41 extern "C" int
    42 WINRT_GLES_LoadLibrary(_THIS, const char *path) {
    43     return SDL_EGL_LoadLibrary(_this, path, EGL_D3D11_ONLY_DISPLAY_ANGLE);
    44 }
    45 
    46 extern "C" {
    47 SDL_EGL_CreateContext_impl(WINRT)
    48 SDL_EGL_SwapWindow_impl(WINRT)
    49 SDL_EGL_MakeCurrent_impl(WINRT)
    50 }
    51 
    52 #endif /* SDL_VIDEO_DRIVER_WINRT && SDL_VIDEO_OPENGL_EGL */
    53 
    54 /* vi: set ts=4 sw=4 expandtab: */
    55