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8ff3019f51
This improves the OpenGL ES support to extend it to version 3.0. A number of new features are available in glesv3 including creation of multi-sampled renderbuffers. These renderbuffers can be blitted to single sample textures (but not the other way around). Other features such as PBO for image uploading, are left as followon work. For this preliminary implementation, glesv3 backends always create renderbuffers, which can be set as single sample or multisample. The renderbuffer's content is blitted to the texture only when used as a source or a mask. Images uploaded to a texture stay there until the surface is used as a rendering target, at which point its painted to the renderbuffer. This patch is heavily based off of Henry Song's initial GLESv3 patch 6f7f3795 from his cairogles fork of Cairo, and incorporates subsequent fixes and pertinent refactorings from his trunk and review feedback from Uli. This implements the *functional* support for glesv3, excluding the various optimization work to utilize its features. Rendering and performance should not be expected to improve notably from pure glesv2. As the GL backend for Cairo remains "experimental", these changes should likewise be considered as such. Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>
96 lines
3.3 KiB
C
96 lines
3.3 KiB
C
/* cairo - a vector graphics library with display and print output
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*
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* Copyright © 2009 Eric Anholt
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* Copyright © 2009 Chris Wilson
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* Copyright © 2005,2010 Red Hat, Inc
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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 either under the terms of the GNU Lesser General Public
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* License version 2.1 as published by the Free Software Foundation
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* (the "LGPL") or, at your option, under the terms of the Mozilla
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* Public License Version 1.1 (the "MPL"). If you do not alter this
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* notice, a recipient may use your version of this file under either
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* the MPL or the LGPL.
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*
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* You should have received a copy of the LGPL along with this library
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* in the file COPYING-LGPL-2.1; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
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* You should have received a copy of the MPL along with this library
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* in the file COPYING-MPL-1.1
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
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* OF ANY KIND, either express or implied. See the LGPL or the MPL for
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* the specific language governing rights and limitations.
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*
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* The Original Code is the cairo graphics library.
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*
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* The Initial Developer of the Original Code is Red Hat, Inc.
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*
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* Contributor(s):
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* Benjamin Otte <otte@gnome.org>
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* Carl Worth <cworth@cworth.org>
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* Chris Wilson <chris@chris-wilson.co.uk>
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* Eric Anholt <eric@anholt.net>
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*/
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#ifndef CAIRO_GL_GRADIENT_PRIVATE_H
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#define CAIRO_GL_GRADIENT_PRIVATE_H
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#define GL_GLEXT_PROTOTYPES
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#include "cairo-cache-private.h"
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#include "cairo-device-private.h"
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#include "cairo-reference-count-private.h"
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#include "cairo-pattern-private.h"
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#include "cairo-types-private.h"
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#include "cairo-gl.h"
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#if CAIRO_HAS_GLESV3_SURFACE
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#include <GLES3/gl3.h>
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#include <GLES3/gl3ext.h>
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#elif CAIRO_HAS_GLESV2_SURFACE
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#include <GLES2/gl2.h>
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#include <GLES2/gl2ext.h>
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#elif CAIRO_HAS_GL_SURFACE
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#include <GL/gl.h>
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#include <GL/glext.h>
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#endif
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#define CAIRO_GL_GRADIENT_CACHE_SIZE 4096
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/* XXX: Declare in a better place */
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typedef struct _cairo_gl_context cairo_gl_context_t;
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typedef struct _cairo_gl_gradient {
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cairo_cache_entry_t cache_entry;
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cairo_reference_count_t ref_count;
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cairo_device_t *device; /* NB: we don't hold a reference */
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GLuint tex;
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unsigned int n_stops;
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const cairo_gradient_stop_t *stops;
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cairo_gradient_stop_t stops_embedded[1];
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} cairo_gl_gradient_t;
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cairo_private cairo_int_status_t
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_cairo_gl_gradient_create (cairo_gl_context_t *ctx,
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unsigned int n_stops,
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const cairo_gradient_stop_t *stops,
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cairo_gl_gradient_t **gradient_out);
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cairo_private_no_warn cairo_gl_gradient_t *
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_cairo_gl_gradient_reference (cairo_gl_gradient_t *gradient);
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cairo_private void
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_cairo_gl_gradient_destroy (cairo_gl_gradient_t *gradient);
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cairo_private cairo_bool_t
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_cairo_gl_gradient_equal (const void *key_a, const void *key_b);
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#endif /* CAIRO_GL_GRADIENT_PRIVATE_H */
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