cscg22-gearboy

CSCG 2022 Challenge 'Gearboy'
git clone https://git.sinitax.com/sinitax/cscg22-gearboy
Log | Files | Refs | sfeed.txt

SDL_windowsopengles.c (4794B)

      1/*
      2  Simple DirectMedia Layer
      3  Copyright (C) 1997-2014 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_WINDOWS && SDL_VIDEO_OPENGL_EGL
     24
     25#include "SDL_windowsvideo.h"
     26#include "SDL_windowsopengles.h"
     27#include "SDL_windowsopengl.h"
     28#include "SDL_log.h"
     29
     30/* EGL implementation of SDL OpenGL support */
     31
     32int
     33WIN_GLES_LoadLibrary(_THIS, const char *path) {
     34
     35    /* If the profile requested is not GL ES, switch over to WIN_GL functions  */
     36    if (_this->gl_config.profile_mask != SDL_GL_CONTEXT_PROFILE_ES) {
     37#if SDL_VIDEO_OPENGL_WGL
     38        WIN_GLES_UnloadLibrary(_this);
     39        _this->GL_LoadLibrary = WIN_GL_LoadLibrary;
     40        _this->GL_GetProcAddress = WIN_GL_GetProcAddress;
     41        _this->GL_UnloadLibrary = WIN_GL_UnloadLibrary;
     42        _this->GL_CreateContext = WIN_GL_CreateContext;
     43        _this->GL_MakeCurrent = WIN_GL_MakeCurrent;
     44        _this->GL_SetSwapInterval = WIN_GL_SetSwapInterval;
     45        _this->GL_GetSwapInterval = WIN_GL_GetSwapInterval;
     46        _this->GL_SwapWindow = WIN_GL_SwapWindow;
     47        _this->GL_DeleteContext = WIN_GL_DeleteContext;
     48        return WIN_GL_LoadLibrary(_this, path);
     49#else
     50        return SDL_SetError("SDL not configured with OpenGL/WGL support");
     51#endif
     52    }
     53    
     54    if (_this->egl_data == NULL) {
     55        return SDL_EGL_LoadLibrary(_this, NULL, EGL_DEFAULT_DISPLAY);
     56    }
     57
     58    return 0;
     59}
     60
     61SDL_GLContext
     62WIN_GLES_CreateContext(_THIS, SDL_Window * window)
     63{
     64    SDL_GLContext context;
     65    SDL_WindowData *data = (SDL_WindowData *)window->driverdata;
     66
     67#if SDL_VIDEO_OPENGL_WGL
     68    if (_this->gl_config.profile_mask != SDL_GL_CONTEXT_PROFILE_ES) {
     69        /* Switch to WGL based functions */
     70        WIN_GLES_UnloadLibrary(_this);
     71        _this->GL_LoadLibrary = WIN_GL_LoadLibrary;
     72        _this->GL_GetProcAddress = WIN_GL_GetProcAddress;
     73        _this->GL_UnloadLibrary = WIN_GL_UnloadLibrary;
     74        _this->GL_CreateContext = WIN_GL_CreateContext;
     75        _this->GL_MakeCurrent = WIN_GL_MakeCurrent;
     76        _this->GL_SetSwapInterval = WIN_GL_SetSwapInterval;
     77        _this->GL_GetSwapInterval = WIN_GL_GetSwapInterval;
     78        _this->GL_SwapWindow = WIN_GL_SwapWindow;
     79        _this->GL_DeleteContext = WIN_GL_DeleteContext;
     80
     81        if (WIN_GL_LoadLibrary(_this, NULL) != 0) {
     82            return NULL;
     83        }
     84
     85        return WIN_GL_CreateContext(_this, window);
     86    }
     87#endif
     88
     89    context = SDL_EGL_CreateContext(_this, data->egl_surface);
     90    return context;
     91}
     92
     93void
     94WIN_GLES_DeleteContext(_THIS, SDL_GLContext context)
     95{
     96    SDL_EGL_DeleteContext(_this, context);
     97    WIN_GLES_UnloadLibrary(_this);
     98}
     99
    100SDL_EGL_SwapWindow_impl(WIN)
    101SDL_EGL_MakeCurrent_impl(WIN)
    102
    103int
    104WIN_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) {
    114            return -1;
    115        }
    116    }
    117  
    118    /* Create the GLES window surface */
    119    windowdata->egl_surface = SDL_EGL_CreateSurface(_this, (NativeWindowType)windowdata->hwnd);
    120
    121    if (windowdata->egl_surface == EGL_NO_SURFACE) {
    122        return SDL_SetError("Could not create GLES window surface");
    123    }
    124
    125    return WIN_GLES_MakeCurrent(_this, current_win, current_ctx);    
    126}
    127
    128int
    129WIN_GLES_SetSwapInterval(_THIS, int interval)
    130{
    131    /* FIXME: This should call SDL_EGL_SetSwapInterval, but ANGLE has a bug that prevents this
    132     * from working if we do (the window contents freeze and don't swap properly). So, we ignore
    133     * the request for now.
    134     */
    135    SDL_Log("WARNING: Ignoring SDL_GL_SetSwapInterval call due to ANGLE bug");
    136    return 0;
    137}
    138
    139#endif /* SDL_VIDEO_DRIVER_WINDOWS && SDL_VIDEO_OPENGL_EGL */
    140
    141/* vi: set ts=4 sw=4 expandtab: */