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https://gitlab.uni-freiburg.de/opensourcevdi/spice
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c2b1c0e7f3
Setting CHECKDIFF=1 environment variable will compare the rendering of the selected canvas with a software canvas. This is useful for debugging some rendering issues, however it is far from being perfect, since it's not able to tell whether one or the other is actually faulty. It's a strong indication though of which operations are incorrect. Ideally, all operations should be checked, however, a few of them are disabled by default because they fail all the time, and it looks like pixman is not very accurate for blending/compositing (at least visually, it seems gl has better rendering)
68 lines
2.3 KiB
C++
68 lines
2.3 KiB
C++
/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
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/*
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Copyright (C) 2009 Red Hat, Inc.
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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 2.1 of the License, or (at your option) any later version.
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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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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _H_RED_PIXMAP
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#define _H_RED_PIXMAP
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#include "red_drawable.h"
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#include "utils.h"
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class RedPixmap: public RedDrawable {
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public:
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RedPixmap(int width, int height, Format format, bool top_bottom);
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virtual ~RedPixmap();
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virtual SpicePoint get_size() { SpicePoint pt = {_width, _height}; return pt;}
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int get_width() { return _width;}
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int get_height() { return _height;}
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int get_stride() { return _stride;}
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uint8_t* get_data() { return _data;}
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bool is_big_endian_bits();
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virtual RedDrawable::Format get_format() { return _format; }
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bool equal(const RedPixmap &other, const SpiceRect &rect) const {
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spice_debug("l:%d r:%d t:%d b:%d", rect.left, rect.right, rect.top, rect.bottom);
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for (int x = rect.left; x < rect.right; ++x)
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for (int y = rect.top; y < rect.bottom; ++y) {
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for (int i = 0; i < 3; i++) { // ignore alpha
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int p = x * 4 + y * _stride + i;
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if (other._data[p] != _data[p]) {
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spice_printerr("equal fails at (+%d+%d) +%d+%d:%d in %dx%d",
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rect.left, rect.top, x-rect.left, y-rect.top, i,
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_width-rect.left, _height-rect.top);
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if (getenv("DIFFBP"))
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SPICE_BREAKPOINT();
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return false;
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}
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}
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}
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return true;
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}
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protected:
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Format _format;
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int _width;
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int _height;
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int _stride;
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bool _top_bottom;
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uint8_t* _data;
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};
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#endif
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