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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.
126 lines
4 KiB
C
126 lines
4 KiB
C
/*
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* Copyright © 2008 Chris Wilson
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*
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* Permission to use, copy, modify, distribute, and sell this software
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* and its documentation for any purpose is hereby granted without
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* fee, provided that the above copyright notice appear in all copies
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* and that both that copyright notice and this permission notice
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* appear in supporting documentation, and that the name of
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* Chris Wilson not be used in advertising or publicity pertaining to
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* distribution of the software without specific, written prior
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* permission. Chris Wilson makes no representations about the
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* suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* CHRIS WILSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
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* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL CHRIS WILSON BE LIABLE FOR ANY SPECIAL,
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* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
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* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Author: Chris Wilson <chris@chris-wilson.co.uk>
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*/
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#include "cairo-test.h"
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static cairo_surface_t *create_source_surface (int size);
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/* We use a relatively large source to exercise bug:
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* Bug 7360 painting huge surfaces fails
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* [https://bugs.freedesktop.org/show_bug.cgi?id=7360]
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* but still keep the resultant image small for reasonably quick checking.
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*/
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#define SOURCE_SIZE 2000
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#define INTER_SIZE 512
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#define SIZE 90
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static void
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draw_pattern (cairo_surface_t **surface_inout, int surface_size)
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{
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cairo_t *cr;
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cr = cairo_create (*surface_inout);
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cairo_surface_destroy (*surface_inout);
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cairo_set_source_rgb (cr, 1, 1, 1);
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cairo_rectangle (cr,
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0, 0,
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surface_size / 2, surface_size / 2);
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cairo_fill (cr);
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cairo_set_source_rgb (cr, 1, 0, 0);
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cairo_rectangle (cr,
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surface_size / 2, 0,
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surface_size / 2, surface_size / 2);
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cairo_fill (cr);
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cairo_set_source_rgb (cr, 0, 1, 0);
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cairo_rectangle (cr,
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0, surface_size / 2,
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surface_size / 2, surface_size / 2);
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cairo_fill (cr);
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cairo_set_source_rgb (cr, 0, 0, 1);
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cairo_rectangle (cr,
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surface_size / 2, surface_size / 2,
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surface_size / 2, surface_size / 2);
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cairo_fill (cr);
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*surface_inout = cairo_surface_reference (cairo_get_target (cr));
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cairo_destroy (cr);
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}
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static cairo_test_status_t
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draw (cairo_t *cr, int width, int height)
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{
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cairo_surface_t *surface;
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cairo_surface_t *similar;
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cairo_t *cr2;
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cairo_set_source_rgb (cr, 0, 0, 0);
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cairo_paint (cr);
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surface = create_source_surface (SOURCE_SIZE);
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if (surface == NULL) /* can't create the source so skip the test */
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return CAIRO_TEST_UNTESTED;
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draw_pattern (&surface, SOURCE_SIZE);
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/* copy a subregion to a smaller intermediate surface */
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similar = cairo_surface_create_similar (surface,
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CAIRO_CONTENT_COLOR_ALPHA,
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INTER_SIZE, INTER_SIZE);
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cr2 = cairo_create (similar);
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cairo_surface_destroy (similar);
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cairo_set_source_surface (cr2, surface,
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(INTER_SIZE - SOURCE_SIZE)/2,
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(INTER_SIZE - SOURCE_SIZE)/2);
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cairo_paint (cr2);
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/* and then paint onto a small surface for checking */
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cairo_set_source_surface (cr, cairo_get_target (cr2),
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(width - INTER_SIZE)/2,
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(height - INTER_SIZE)/2);
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cairo_destroy (cr2);
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cairo_rectangle (cr, 15, 15, 60, 60);
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cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
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cairo_fill (cr);
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/* destroy the surface last, as this triggers XCloseDisplay */
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cairo_surface_destroy (surface);
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return CAIRO_TEST_SUCCESS;
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}
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static cairo_test_status_t
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preamble (cairo_test_context_t *ctx)
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{
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cairo_surface_t *surface;
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surface = create_source_surface (SOURCE_SIZE);
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if (surface == NULL) /* can't create the source so skip the test */
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return CAIRO_TEST_UNTESTED;
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cairo_surface_destroy (surface);
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return CAIRO_TEST_SUCCESS;
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}
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