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c25992479a
Damian Frank noted [http://lists.cairographics.org/archives/cairo/2009-May/017095.html] a performance problem with an older XServer with an unaccelerated composite - similar problems will be seen with non-XRender servers which will trigger extraneous fallbacks. The problem he found was that painting an ARGB32 image onto an RGB24 destination window (using SOURCE) was going via the RENDER protocol and not core. He was able to demonstrate that this could be worked around by declaring the pixel data as an RGB24 image. The issue is that the image is uploaded into a temporary pixmap of matching depth (i.e. 32 bit for ARGB32 and 24 bit for RGB23 data), however the core protocol can only blit between Drawables of matching depth - so without the work-around the Drawables are mismatched and we either need to use RENDER or fallback. This patch adds a content mask to _cairo_surface_clone_similar() to provide the extra bit of information to the backends for when it is possible for them to drop channels from the clone. This is used by the xlib backend to only create a 24 bit source when blitting to a Window.
133 lines
4.5 KiB
C
133 lines
4.5 KiB
C
/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */
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/* cairo - a vector graphics library with display and print output
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*
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* Copyright © 2002 University of Southern California
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* Copyright © 2005 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 University of Southern
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* California.
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*
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* Contributor(s):
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* Carl D. Worth <cworth@cworth.org>
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*/
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#ifndef CAIRO_SURFACE_FALLBACK_PRIVATE_H
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#define CAIRO_SURFACE_FALLBACK_PRIVATE_H
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#include "cairoint.h"
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cairo_private cairo_status_t
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_cairo_surface_fallback_paint (cairo_surface_t *surface,
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cairo_operator_t op,
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const cairo_pattern_t *source);
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cairo_private cairo_status_t
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_cairo_surface_fallback_mask (cairo_surface_t *surface,
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cairo_operator_t op,
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const cairo_pattern_t *source,
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const cairo_pattern_t *mask);
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cairo_private cairo_status_t
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_cairo_surface_fallback_stroke (cairo_surface_t *surface,
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cairo_operator_t op,
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const cairo_pattern_t *source,
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cairo_path_fixed_t *path,
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cairo_stroke_style_t *stroke_style,
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cairo_matrix_t *ctm,
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cairo_matrix_t *ctm_inverse,
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double tolerance,
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cairo_antialias_t antialias);
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cairo_private cairo_status_t
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_cairo_surface_fallback_fill (cairo_surface_t *surface,
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cairo_operator_t op,
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const cairo_pattern_t *source,
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cairo_path_fixed_t *path,
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cairo_fill_rule_t fill_rule,
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double tolerance,
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cairo_antialias_t antialias);
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cairo_private cairo_status_t
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_cairo_surface_fallback_show_glyphs (cairo_surface_t *surface,
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cairo_operator_t op,
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const cairo_pattern_t *source,
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cairo_glyph_t *glyphs,
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int num_glyphs,
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cairo_scaled_font_t *scaled_font);
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cairo_private cairo_surface_t *
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_cairo_surface_fallback_snapshot (cairo_surface_t *surface);
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cairo_private cairo_status_t
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_cairo_surface_fallback_composite (cairo_operator_t op,
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const cairo_pattern_t *src,
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const cairo_pattern_t *mask,
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cairo_surface_t *dst,
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int src_x,
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int src_y,
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int mask_x,
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int mask_y,
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int dst_x,
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int dst_y,
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unsigned int width,
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unsigned int height);
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cairo_private cairo_status_t
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_cairo_surface_fallback_fill_rectangles (cairo_surface_t *surface,
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cairo_operator_t op,
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const cairo_color_t *color,
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cairo_rectangle_int_t *rects,
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int num_rects);
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cairo_private cairo_status_t
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_cairo_surface_fallback_composite_trapezoids (cairo_operator_t op,
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const cairo_pattern_t *pattern,
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cairo_surface_t *dst,
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cairo_antialias_t antialias,
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int src_x,
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int src_y,
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int dst_x,
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int dst_y,
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unsigned int width,
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unsigned int height,
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cairo_trapezoid_t *traps,
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int num_traps);
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cairo_private cairo_status_t
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_cairo_surface_fallback_clone_similar (cairo_surface_t *surface,
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cairo_surface_t *src,
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cairo_content_t content,
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int src_x,
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int src_y,
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int width,
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int height,
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int *clone_offset_x,
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int *clone_offset_y,
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cairo_surface_t **clone_out);
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#endif
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