cc4c578887
If a NULL display is passed to cogl_context_new() then it has to implicitly create a CoglRenderer and CoglDisplay and propagate any resulting errors back to the user. Previously the implementation relied on passing a NULL renderer to cogl_display_new() as the means for implicitly connecting to a renderer. The problem with this though is that cogl_display_new() isn't designed to ever return NULL but if it failed to connect to a renderer automatically it would do and then cogl_context_new would pass NULL to cogl_display_setup() leading to a crash. This patch changes the implementation of cogl_context_new() to now explicitly create a CoglRenderer and connect to it if a NULL display is given. This way we can easily propagate any errors. In addition cogl_display_new has been changed to abort if it fails to implicitly connect to a renderer due to a NULL renderer argument. An application needing to gracefully handle problems connecting to a renderer at runtime should manually instantiate and connect a renderer passing a GError argument to cogl_renderer_connect. Reviewed-by: Neil Roberts <neil@linux.intel.com>
155 lines
3.7 KiB
C
155 lines
3.7 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) 2011 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, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Authors:
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* Robert Bragg <robert@linux.intel.com>
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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 <string.h>
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#include "cogl-private.h"
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#include "cogl-object.h"
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#include "cogl-internal.h"
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#include "cogl-display-private.h"
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#include "cogl-renderer-private.h"
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#include "cogl-winsys-private.h"
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static void _cogl_display_free (CoglDisplay *display);
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COGL_OBJECT_DEFINE (Display, display);
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static const CoglWinsysVtable *
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_cogl_display_get_winsys (CoglDisplay *display)
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{
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return display->renderer->winsys_vtable;
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}
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static void
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_cogl_display_free (CoglDisplay *display)
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{
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const CoglWinsysVtable *winsys;
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if (display->setup)
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{
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winsys = _cogl_display_get_winsys (display);
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winsys->display_destroy (display);
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display->setup = FALSE;
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}
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if (display->renderer)
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{
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cogl_object_unref (display->renderer);
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display->renderer = NULL;
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}
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if (display->onscreen_template)
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{
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cogl_object_unref (display->onscreen_template);
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display->onscreen_template = NULL;
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}
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g_slice_free (CoglDisplay, display);
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}
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CoglDisplay *
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cogl_display_new (CoglRenderer *renderer,
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CoglOnscreenTemplate *onscreen_template)
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{
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CoglDisplay *display = g_slice_new0 (CoglDisplay);
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GError *error = NULL;
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_cogl_init ();
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display->renderer = renderer;
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if (renderer)
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cogl_object_ref (renderer);
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else
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display->renderer = cogl_renderer_new ();
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if (!cogl_renderer_connect (display->renderer, &error))
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g_error ("Failed to connect to renderer: %s\n", error->message);
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display->onscreen_template = onscreen_template;
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if (onscreen_template)
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cogl_object_ref (onscreen_template);
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else
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display->onscreen_template = cogl_onscreen_template_new (NULL);
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display->setup = FALSE;
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#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
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display->gdl_plane = GDL_PLANE_ID_UPP_C;
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#endif
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return _cogl_display_object_new (display);
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}
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CoglRenderer *
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cogl_display_get_renderer (CoglDisplay *display)
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{
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return display->renderer;
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}
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gboolean
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cogl_display_setup (CoglDisplay *display,
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GError **error)
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{
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const CoglWinsysVtable *winsys;
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if (display->setup)
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return TRUE;
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winsys = _cogl_display_get_winsys (display);
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if (!winsys->display_setup (display, error))
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return FALSE;
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display->setup = TRUE;
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return TRUE;
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}
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#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
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void
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cogl_gdl_display_set_plane (CoglDisplay *display,
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gdl_plane_id_t plane)
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{
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_COGL_RETURN_IF_FAIL (display->setup == FALSE);
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display->gdl_plane = plane;
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}
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#endif
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#ifdef COGL_HAS_WAYLAND_EGL_SERVER_SUPPORT
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void
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cogl_wayland_display_set_compositor_display (CoglDisplay *display,
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struct wl_display *wayland_display)
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{
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_COGL_RETURN_IF_FAIL (display->setup == FALSE);
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display->wayland_compositor_display = wayland_display;
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}
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#endif
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