a74c81ada3
This adds support for multisample based rendering of onscreen windows whereby multiple point samples per pixel can be requested and if the hardware supports that it results in reduced aliasing (especially considering the jagged edges of polygons) Reviewed-by: Neil Roberts <neil@linux.intel.com>
89 lines
2.6 KiB
C
89 lines
2.6 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 "cogl.h"
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#include "cogl-object.h"
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#include "cogl-framebuffer-private.h"
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#include "cogl-onscreen-template-private.h"
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#include <stdlib.h>
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static void _cogl_onscreen_template_free (CoglOnscreenTemplate *onscreen_template);
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COGL_OBJECT_DEFINE (OnscreenTemplate, onscreen_template);
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GQuark
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cogl_onscreen_template_error_quark (void)
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{
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return g_quark_from_static_string ("cogl-onscreen-template-error-quark");
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}
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static void
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_cogl_onscreen_template_free (CoglOnscreenTemplate *onscreen_template)
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{
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g_slice_free (CoglOnscreenTemplate, onscreen_template);
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}
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CoglOnscreenTemplate *
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cogl_onscreen_template_new (CoglSwapChain *swap_chain)
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{
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CoglOnscreenTemplate *onscreen_template = g_slice_new0 (CoglOnscreenTemplate);
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char *user_config;
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onscreen_template->config.swap_chain = swap_chain;
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if (swap_chain)
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cogl_object_ref (swap_chain);
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else
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onscreen_template->config.swap_chain = cogl_swap_chain_new ();
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onscreen_template->config.need_stencil = TRUE;
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onscreen_template->config.samples_per_pixel = 0;
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user_config = getenv ("COGL_POINT_SAMPLES_PER_PIXEL");
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if (user_config)
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{
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unsigned long samples_per_pixel = strtoul (user_config, NULL, 10);
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if (samples_per_pixel != ULONG_MAX)
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onscreen_template->config.samples_per_pixel =
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samples_per_pixel;
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}
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return _cogl_onscreen_template_object_new (onscreen_template);
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}
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void
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cogl_onscreen_template_set_samples_per_pixel (
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CoglOnscreenTemplate *onscreen_template,
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int samples_per_pixel)
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{
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onscreen_template->config.samples_per_pixel = samples_per_pixel;
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}
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