de88474dda
With this commit, you can compile SDL2 with Emscripten ( http://emscripten.org/ ), and make your SDL-based C/C++ program into a web app. This port was due to the efforts of several people, including: Charlie Birks, Sathyanarayanan Gunasekaran, Jukka Jylänki, Alon Zakai, Edward Rudd, Bruce Mitchener, and Martin Gerhardy. (Thanks, everyone!) --HG-- extra : rebase_source : 97af74c8a5121e926ebe89f123536b5dd6681695
117 lines
3.5 KiB
C
117 lines
3.5 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../../SDL_internal.h"
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#if SDL_VIDEO_DRIVER_EMSCRIPTEN && SDL_VIDEO_OPENGL_EGL
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#include <emscripten/emscripten.h>
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#include <GLES2/gl2.h>
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#include "SDL_emscriptenvideo.h"
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#include "SDL_emscriptenopengles.h"
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#define LOAD_FUNC(NAME) _this->egl_data->NAME = NAME;
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/* EGL implementation of SDL OpenGL support */
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int
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Emscripten_GLES_LoadLibrary(_THIS, const char *path) {
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/*we can't load EGL dynamically*/
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_this->egl_data = (struct SDL_EGL_VideoData *) SDL_calloc(1, sizeof(SDL_EGL_VideoData));
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if (!_this->egl_data) {
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return SDL_OutOfMemory();
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}
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LOAD_FUNC(eglGetDisplay);
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LOAD_FUNC(eglInitialize);
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LOAD_FUNC(eglTerminate);
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LOAD_FUNC(eglGetProcAddress);
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LOAD_FUNC(eglChooseConfig);
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LOAD_FUNC(eglGetConfigAttrib);
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LOAD_FUNC(eglCreateContext);
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LOAD_FUNC(eglDestroyContext);
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LOAD_FUNC(eglCreateWindowSurface);
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LOAD_FUNC(eglDestroySurface);
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LOAD_FUNC(eglMakeCurrent);
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LOAD_FUNC(eglSwapBuffers);
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LOAD_FUNC(eglSwapInterval);
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LOAD_FUNC(eglWaitNative);
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LOAD_FUNC(eglWaitGL);
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LOAD_FUNC(eglBindAPI);
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_this->egl_data->egl_display = _this->egl_data->eglGetDisplay(EGL_DEFAULT_DISPLAY);
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if (!_this->egl_data->egl_display) {
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return SDL_SetError("Could not get EGL display");
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}
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if (_this->egl_data->eglInitialize(_this->egl_data->egl_display, NULL, NULL) != EGL_TRUE) {
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return SDL_SetError("Could not initialize EGL");
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}
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_this->gl_config.driver_loaded = 1;
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if (path) {
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SDL_strlcpy(_this->gl_config.driver_path, path, sizeof(_this->gl_config.driver_path) - 1);
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} else {
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*_this->gl_config.driver_path = '\0';
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}
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return 0;
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}
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void
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Emscripten_GLES_DeleteContext(_THIS, SDL_GLContext context)
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{
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/*
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WebGL contexts can't actually be deleted, so we need to reset it.
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ES2 renderer resets state on init anyway, clearing the canvas should be enough
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*/
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
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SDL_EGL_DeleteContext(_this, context);
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}
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SDL_EGL_CreateContext_impl(Emscripten)
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SDL_EGL_SwapWindow_impl(Emscripten)
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SDL_EGL_MakeCurrent_impl(Emscripten)
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void
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Emscripten_GLES_GetDrawableSize(_THIS, SDL_Window * window, int * w, int * h)
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{
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SDL_WindowData *data;
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if (window->driverdata) {
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data = (SDL_WindowData *) window->driverdata;
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if (w) {
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*w = window->w * data->pixel_ratio;
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}
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if (h) {
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*h = window->h * data->pixel_ratio;
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}
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}
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}
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#endif /* SDL_VIDEO_DRIVER_EMSCRIPTEN && SDL_VIDEO_OPENGL_EGL */
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/* vi: set ts=4 sw=4 expandtab: */
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