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17c818a9a7
This adds an alternate version of the SDL winsys using the SDL 2 API. The two versions are mutually exclusive and share the same CoglWinsysID. Version 2 of SDL fits a little bit better with Cogl because it supports multiple windows and the video subsystem can be initialised entirely independently of the rest of the subsystems. The SDL2 winsys creates an invisible dummy window in order to bind the GL context after creating the Cogl display. This is similar to how the X11 winsys's work. SDL2 seems to support compiling with support for both GL and GLES. However there doesn't seem to be a way to select between the two backends outside of SDL. In fact if you do compile them both in it seems to break down because it will always try to use the window system functions from the GLES backend because those are filled in second in the vtable. However when creating the window it will always prefer to use the GL function to choose a visual. This function gets confused because the GL backend has not been initialised at that point. The Cogl backend therefore just leaves it up to SDL to pick a sensible backend. It will then verify that it picked a GL library which matches the Cogl driver by checking the string from glGetString(GL_VERSION). Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 6cb5ab41355e7bfe28f367cf4afa39a7afcfeec2)
86 lines
2.1 KiB
C
86 lines
2.1 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2012 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "cogl-sdl.h"
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#include "cogl-context-private.h"
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#include "cogl-renderer-private.h"
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void
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cogl_sdl_renderer_set_event_type (CoglRenderer *renderer, int type)
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{
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renderer->sdl_event_type_set = TRUE;
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renderer->sdl_event_type = type;
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}
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int
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cogl_sdl_renderer_get_event_type (CoglRenderer *renderer)
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{
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_COGL_RETURN_VAL_IF_FAIL (renderer->sdl_event_type_set, SDL_USEREVENT);
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return renderer->sdl_event_type;
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}
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CoglContext *
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cogl_sdl_context_new (int type, GError **error)
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{
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CoglRenderer *renderer = cogl_renderer_new ();
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CoglDisplay *display;
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cogl_renderer_set_winsys_id (renderer, COGL_WINSYS_ID_SDL);
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cogl_sdl_renderer_set_event_type (renderer, type);
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if (!cogl_renderer_connect (renderer, error))
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return NULL;
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display = cogl_display_new (renderer, NULL);
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if (!cogl_display_setup (display, error))
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return NULL;
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return cogl_context_new (display, error);
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}
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void
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cogl_sdl_handle_event (CoglContext *context, SDL_Event *event)
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{
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const CoglWinsysVtable *winsys;
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_COGL_RETURN_IF_FAIL (cogl_is_context (context));
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winsys = _cogl_context_get_winsys (context);
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if (winsys->poll_dispatch)
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winsys->poll_dispatch (context, NULL, 0);
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}
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void
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cogl_sdl_idle (CoglContext *context)
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{
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/* NOP since Cogl doesn't currently need to do anything when idle */
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}
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