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Diffstat (limited to 'examples/qws/svgalib/svgalibpaintengine.cpp')
| -rw-r--r-- | examples/qws/svgalib/svgalibpaintengine.cpp | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/examples/qws/svgalib/svgalibpaintengine.cpp b/examples/qws/svgalib/svgalibpaintengine.cpp new file mode 100644 index 0000000000..f6774d0683 --- /dev/null +++ b/examples/qws/svgalib/svgalibpaintengine.cpp @@ -0,0 +1,190 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "svgalibpaintengine.h" + +#include <QColor> +#include <vga.h> +#include <vgagl.h> + +SvgalibPaintEngine::SvgalibPaintEngine(QPaintDevice *device) + : QRasterPaintEngine(device) +{ +} + +SvgalibPaintEngine::~SvgalibPaintEngine() +{ +} + +//! [0] +bool SvgalibPaintEngine::begin(QPaintDevice *dev) +{ + device = dev; + pen = Qt::NoPen; + simplePen = true; + brush = Qt::NoBrush; + simpleBrush = true; + matrix = QTransform(); + simpleMatrix = true; + setClip(QRect(0, 0, device->width(), device->height())); + opaque = true; + aliased = true; + sourceOver = true; + + return QRasterPaintEngine::begin(dev); +} +//! [0] + +//! [1] +bool SvgalibPaintEngine::end() +{ + gl_setclippingwindow(0, 0, device->width() - 1, device->height() - 1); + return QRasterPaintEngine::end(); +} +//! [1] + +//! [2] +void SvgalibPaintEngine::updateState() +{ + QRasterPaintEngineState *s = state(); + + if (s->dirty & DirtyTransform) { + matrix = s->matrix; + simpleMatrix = (matrix.m12() == 0 && matrix.m21() == 0); + } + + if (s->dirty & DirtyPen) { + pen = s->pen; + simplePen = (pen.width() == 0 || pen.widthF() <= 1) + && (pen.style() == Qt::NoPen || pen.style() == Qt::SolidLine) + && (pen.color().alpha() == 255); + } + + if (s->dirty & DirtyBrush) { + brush = s->brush; + simpleBrush = (brush.style() == Qt::SolidPattern + || brush.style() == Qt::NoBrush) + && (brush.color().alpha() == 255); + } + + if (s->dirty & DirtyClipRegion) + setClip(s->clipRegion); + + if (s->dirty & DirtyClipEnabled) { + clipEnabled = s->isClipEnabled(); + updateClip(); + } + + if (s->dirty & DirtyClipPath) { + setClip(QRegion()); + simpleClip = false; + } + + if (s->dirty & DirtyCompositionMode) { + const QPainter::CompositionMode m = s->composition_mode; + sourceOver = (m == QPainter::CompositionMode_SourceOver); + } + + if (s->dirty & DirtyOpacity) + opaque = (s->opacity == 256); + + if (s->dirty & DirtyHints) + aliased = !(s->flags.antialiased); +} +//! [2] + +//! [3] +void SvgalibPaintEngine::setClip(const QRegion ®ion) +{ + if (region.isEmpty()) + clip = QRect(0, 0, device->width(), device->height()); + else + clip = matrix.map(region) & QRect(0, 0, device->width(), device->height()); + clipEnabled = true; + updateClip(); +} +//! [3] + +//! [4] +void SvgalibPaintEngine::updateClip() +{ + QRegion clipRegion = QRect(0, 0, device->width(), device->height()); + + if (!systemClip().isEmpty()) + clipRegion &= systemClip(); + if (clipEnabled) + clipRegion &= clip; + + simpleClip = (clipRegion.rects().size() <= 1); + + const QRect r = clipRegion.boundingRect(); + gl_setclippingwindow(r.left(), r.top(), + r.x() + r.width(), + r.y() + r.height()); +} +//! [4] + +//! [5] +void SvgalibPaintEngine::drawRects(const QRect *rects, int rectCount) +{ + const bool canAccelerate = simplePen && simpleBrush && simpleMatrix + && simpleClip && opaque && aliased + && sourceOver; + if (!canAccelerate) { + QRasterPaintEngine::drawRects(rects, rectCount); + return; + } + + for (int i = 0; i < rectCount; ++i) { + const QRect r = matrix.mapRect(rects[i]); + if (brush != Qt::NoBrush) { + gl_fillbox(r.left(), r.top(), r.width(), r.height(), + brush.color().rgba()); + } + if (pen != Qt::NoPen) { + const int c = pen.color().rgba(); + gl_hline(r.left(), r.top(), r.right(), c); + gl_hline(r.left(), r.bottom(), r.right(), c); + gl_line(r.left(), r.top(), r.left(), r.bottom(), c); + gl_line(r.right(), r.top(), r.right(), r.bottom(), c); + } + } +} +//! [5] |