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Diffstat (limited to 'examples/qws/svgalib/svgalibscreen.cpp')
| -rw-r--r-- | examples/qws/svgalib/svgalibscreen.cpp | 354 |
1 files changed, 354 insertions, 0 deletions
diff --git a/examples/qws/svgalib/svgalibscreen.cpp b/examples/qws/svgalib/svgalibscreen.cpp new file mode 100644 index 0000000000..1961d3c9d4 --- /dev/null +++ b/examples/qws/svgalib/svgalibscreen.cpp @@ -0,0 +1,354 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "svgalibscreen.h" +#include "svgalibsurface.h" + +#include <QVector> +#include <QApplication> +#include <QColor> +#include <QWidget> + +#include <math.h> + +static int getModeDepth(vga_modeinfo *mode) +{ + const int bits = int(log2(mode->colors)); + if (bits == 24 && mode->bytesperpixel == 4) + return 32; + return bits; +} + +//! [0] +bool SvgalibScreen::connect(const QString &displaySpec) +{ + int mode = vga_getdefaultmode(); + if (mode <= 0) { + qCritical("SvgalibScreen::connect(): invalid vga mode"); + return false; + } + + vga_modeinfo *modeinfo = vga_getmodeinfo(mode); + + QScreen::lstep = modeinfo->linewidth; + QScreen::dw = QScreen::w = modeinfo->width; + QScreen::dh = QScreen::h = modeinfo->height; + QScreen::d = getModeDepth(modeinfo); + QScreen::size = QScreen::lstep * dh; + QScreen::data = 0; + + switch (depth()) { + case 32: + setPixelFormat(QImage::Format_ARGB32_Premultiplied); + break; + case 24: + setPixelFormat(QImage::Format_RGB888); + break; + case 16: + setPixelFormat(QImage::Format_RGB16); + break; + case 15: + setPixelFormat(QImage::Format_RGB555); + break; + default: + break; + } + + const int dpi = 72; + QScreen::physWidth = qRound(QScreen::dw * 25.4 / dpi); + QScreen::physHeight = qRound(QScreen::dh * 25.4 / dpi); + + const QStringList args = displaySpec.split(QLatin1Char(':'), + QString::SkipEmptyParts); + grayscale = args.contains(QLatin1String("grayscale"), Qt::CaseInsensitive); + + return true; +} +//! [0] + +void SvgalibScreen::initColorMap() +{ + const int numColors = vga_getcolors(); + if (numColors == 2 || numColors > 256) { + screencols = 0; + return; // not a palette based mode + } + + if (numColors == 16) { + if (grayscale) { + for (int i = 0; i < 256; ++i) { + const int c = i * 16 / 256; + vga_setpalette(i, c, c, c); + } + screencols = 256; // XXX: takes advantage of optimization in alloc() + } else { // read in EGA palette + int r, g, b; + for (int i = 0; i < 16; ++i) { + vga_getpalette(i, &r, &g, &b); + screenclut[i] = qRgb(r, g, b); + } + screencols = 16; + } + + return; + } + + Q_ASSERT(numColors == 256); + + if (grayscale) { + for (int i = 0; i < 256; ++i) { + const int c = i * 64 / 256; + vga_setpalette(i, c, c, c); + } + } else { + int i = 0; + +#if 0 + // read in EGA palette + while (i < 16) { + int r, g, b; + vga_getpalette(i, &r, &g, &b); + screenclut[i] = qRgb(r, g, b); + ++i; + } + screencols = 16; +#endif + + // 6 * 6 * 6 color cube + for (int r = 0; r < 6; ++r) { + for (int g = 0; g < 6; ++g) { + for (int b = 0; b < 6; ++b) { + vga_setpalette(i, r * 64/6, g * 64/6, b * 64/6); + screenclut[i] = qRgb(r * 256/6, g * 256/6, b * 256/6); + ++i; + } + } + } + screencols = i; + + while (i < 256) { + screenclut[i] = qRgb(0, 0, 0); + ++i; + } + } +} + +//! [1] +bool SvgalibScreen::initDevice() +{ + if (vga_init() != 0) { + qCritical("SvgalibScreen::initDevice(): unable to initialize svgalib"); + return false; + } + + int mode = vga_getdefaultmode(); + if (vga_setmode(mode) == -1) { + qCritical("SvgalibScreen::initialize(): unable to set graphics mode"); + return false; + } + + if (gl_setcontextvga(mode) != 0) { + qCritical("SvgalibScreen::initDevice(): unable to set vga context"); + return false; + } + context = gl_allocatecontext(); + gl_getcontext(context); + + vga_modeinfo *modeinfo = vga_getmodeinfo(mode); + if (modeinfo->flags & IS_LINEAR) + QScreen::data = vga_getgraphmem(); + + initColorMap(); + + QScreenCursor::initSoftwareCursor(); + return true; +} +//! [1] + +//! [2] +void SvgalibScreen::shutdownDevice() +{ + gl_freecontext(context); + vga_setmode(TEXT); +} +//! [2] + +//! [3] +void SvgalibScreen::disconnect() +{ +} +//! [3] + +//! [4] +void SvgalibScreen::solidFill(const QColor &color, const QRegion ®) +{ + int c; + if (depth() == 4 || depth() == 8) + c = alloc(color.red(), color.green(), color.blue()); + else + c = gl_rgbcolor(color.red(), color.green(), color.blue()); + + const QVector<QRect> rects = (reg & region()).rects(); + for (int i = 0; i < rects.size(); ++i) { + const QRect r = rects.at(i); + gl_fillbox(r.left(), r.top(), r.width(), r.height(), c); + } +} +//! [4] + +void SvgalibScreen::blit16To8(const QImage &image, + const QPoint &topLeft, const QRegion ®ion) +{ + const int imageStride = image.bytesPerLine() / 2; + const QVector<QRect> rects = region.rects(); + + for (int i = 0; i < rects.size(); ++i) { + const QRect r = rects.at(i).translated(-topLeft); + int y = r.y(); + const quint16 *s = reinterpret_cast<const quint16*>(image.scanLine(y)); + + while (y <= r.bottom()) { + int x1 = r.x(); + while (x1 <= r.right()) { + const quint16 c = s[x1]; + int x2 = x1; + // find span length + while ((x2+1 < r.right()) && (s[x2+1] == c)) + ++x2; + gl_hline(x1 + topLeft.x(), y + topLeft.y(), x2 + topLeft.x(), + qt_colorConvert<quint8, quint16>(c, 0)); + x1 = x2 + 1; + } + s += imageStride; + ++y; + } + } +} + +void SvgalibScreen::blit32To8(const QImage &image, + const QPoint &topLeft, const QRegion ®ion) +{ + const int imageStride = image.bytesPerLine() / 4; + const QVector<QRect> rects = region.rects(); + + for (int i = 0; i < rects.size(); ++i) { + const QRect r = rects.at(i).translated(-topLeft); + int y = r.y(); + const quint32 *s = reinterpret_cast<const quint32*>(image.scanLine(y)); + + while (y <= r.bottom()) { + int x1 = r.x(); + while (x1 <= r.right()) { + const quint32 c = s[x1]; + int x2 = x1; + // find span length + while ((x2+1 < r.right()) && (s[x2+1] == c)) + ++x2; + gl_hline(x1 + topLeft.x(), y + topLeft.y(), x2 + topLeft.x(), + qt_colorConvert<quint8, quint32>(c, 0)); + x1 = x2 + 1; + } + s += imageStride; + ++y; + } + } +} + +//! [5] +void SvgalibScreen::blit(const QImage &img, const QPoint &topLeft, + const QRegion ®) +{ + if (depth() == 8) { + switch (img.format()) { + case QImage::Format_RGB16: + blit16To8(img, topLeft, reg); + return; + case QImage::Format_RGB32: + case QImage::Format_ARGB32: + case QImage::Format_ARGB32_Premultiplied: + blit32To8(img, topLeft, reg); + return; + default: + break; + } + } + + if (img.format() != pixelFormat()) { + if (base()) + QScreen::blit(img, topLeft, reg); + return; + } + + const QVector<QRect> rects = (reg & region()).rects(); + + for (int i = 0; i < rects.size(); ++i) { + const QRect r = rects.at(i); + gl_putboxpart(r.x(), r.y(), r.width(), r.height(), + img.width(), img.height(), + static_cast<void*>(const_cast<uchar*>(img.bits())), + r.x() - topLeft.x(), r.y() - topLeft.y()); + } +} +//! [5] + +//! [7] +QWSWindowSurface* SvgalibScreen::createSurface(QWidget *widget) const +{ + if (base()) { + static int onScreenPaint = -1; + if (onScreenPaint == -1) + onScreenPaint = qgetenv("QT_ONSCREEN_PAINT").toInt(); + + if (onScreenPaint > 0 || widget->testAttribute(Qt::WA_PaintOnScreen)) + return new SvgalibSurface(widget); + } + return QScreen::createSurface(widget); +} +//! [7] + +//! [8] +QWSWindowSurface* SvgalibScreen::createSurface(const QString &key) const +{ + if (key == QLatin1String("svgalib")) + return new SvgalibSurface; + return QScreen::createSurface(key); +} +//! [8] |