38be0d1383
This is the beginning of revision history for this module. If you want to look at revision history older than this, please refer to the Qt Git wiki for how to use Git history grafting. At the time of writing, this wiki is located here: http://qt.gitorious.org/qt/pages/GitIntroductionWithQt If you have already performed the grafting and you don't see any history beyond this commit, try running "git log" with the "--follow" argument. Branched from the monolithic repo, Qt master branch, at commit 896db169ea224deb96c59ce8af800d019de63f12
354 lines
10 KiB
C++
354 lines
10 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
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** the names of its contributors may be used to endorse or promote
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** products derived from this software without specific prior written
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** permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "svgalibscreen.h"
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#include "svgalibsurface.h"
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#include <QVector>
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#include <QApplication>
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#include <QColor>
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#include <QWidget>
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#include <math.h>
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static int getModeDepth(vga_modeinfo *mode)
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{
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const int bits = int(log2(mode->colors));
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if (bits == 24 && mode->bytesperpixel == 4)
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return 32;
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return bits;
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}
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//! [0]
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bool SvgalibScreen::connect(const QString &displaySpec)
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{
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int mode = vga_getdefaultmode();
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if (mode <= 0) {
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qCritical("SvgalibScreen::connect(): invalid vga mode");
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return false;
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}
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vga_modeinfo *modeinfo = vga_getmodeinfo(mode);
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QScreen::lstep = modeinfo->linewidth;
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QScreen::dw = QScreen::w = modeinfo->width;
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QScreen::dh = QScreen::h = modeinfo->height;
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QScreen::d = getModeDepth(modeinfo);
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QScreen::size = QScreen::lstep * dh;
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QScreen::data = 0;
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switch (depth()) {
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case 32:
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setPixelFormat(QImage::Format_ARGB32_Premultiplied);
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break;
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case 24:
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setPixelFormat(QImage::Format_RGB888);
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break;
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case 16:
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setPixelFormat(QImage::Format_RGB16);
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break;
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case 15:
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setPixelFormat(QImage::Format_RGB555);
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break;
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default:
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break;
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}
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const int dpi = 72;
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QScreen::physWidth = qRound(QScreen::dw * 25.4 / dpi);
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QScreen::physHeight = qRound(QScreen::dh * 25.4 / dpi);
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const QStringList args = displaySpec.split(QLatin1Char(':'),
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QString::SkipEmptyParts);
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grayscale = args.contains(QLatin1String("grayscale"), Qt::CaseInsensitive);
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return true;
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}
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//! [0]
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void SvgalibScreen::initColorMap()
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{
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const int numColors = vga_getcolors();
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if (numColors == 2 || numColors > 256) {
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screencols = 0;
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return; // not a palette based mode
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}
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if (numColors == 16) {
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if (grayscale) {
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for (int i = 0; i < 256; ++i) {
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const int c = i * 16 / 256;
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vga_setpalette(i, c, c, c);
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}
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screencols = 256; // XXX: takes advantage of optimization in alloc()
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} else { // read in EGA palette
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int r, g, b;
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for (int i = 0; i < 16; ++i) {
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vga_getpalette(i, &r, &g, &b);
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screenclut[i] = qRgb(r, g, b);
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}
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screencols = 16;
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}
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return;
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}
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Q_ASSERT(numColors == 256);
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if (grayscale) {
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for (int i = 0; i < 256; ++i) {
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const int c = i * 64 / 256;
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vga_setpalette(i, c, c, c);
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}
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} else {
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int i = 0;
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#if 0
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// read in EGA palette
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while (i < 16) {
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int r, g, b;
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vga_getpalette(i, &r, &g, &b);
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screenclut[i] = qRgb(r, g, b);
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++i;
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}
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screencols = 16;
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#endif
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// 6 * 6 * 6 color cube
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for (int r = 0; r < 6; ++r) {
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for (int g = 0; g < 6; ++g) {
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for (int b = 0; b < 6; ++b) {
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vga_setpalette(i, r * 64/6, g * 64/6, b * 64/6);
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screenclut[i] = qRgb(r * 256/6, g * 256/6, b * 256/6);
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++i;
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}
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}
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}
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screencols = i;
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while (i < 256) {
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screenclut[i] = qRgb(0, 0, 0);
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++i;
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}
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}
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}
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//! [1]
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bool SvgalibScreen::initDevice()
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{
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if (vga_init() != 0) {
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qCritical("SvgalibScreen::initDevice(): unable to initialize svgalib");
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return false;
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}
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int mode = vga_getdefaultmode();
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if (vga_setmode(mode) == -1) {
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qCritical("SvgalibScreen::initialize(): unable to set graphics mode");
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return false;
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}
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if (gl_setcontextvga(mode) != 0) {
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qCritical("SvgalibScreen::initDevice(): unable to set vga context");
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return false;
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}
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context = gl_allocatecontext();
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gl_getcontext(context);
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vga_modeinfo *modeinfo = vga_getmodeinfo(mode);
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if (modeinfo->flags & IS_LINEAR)
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QScreen::data = vga_getgraphmem();
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initColorMap();
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QScreenCursor::initSoftwareCursor();
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return true;
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}
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//! [1]
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//! [2]
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void SvgalibScreen::shutdownDevice()
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{
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gl_freecontext(context);
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vga_setmode(TEXT);
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}
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//! [2]
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//! [3]
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void SvgalibScreen::disconnect()
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{
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}
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//! [3]
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//! [4]
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void SvgalibScreen::solidFill(const QColor &color, const QRegion ®)
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{
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int c;
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if (depth() == 4 || depth() == 8)
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c = alloc(color.red(), color.green(), color.blue());
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else
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c = gl_rgbcolor(color.red(), color.green(), color.blue());
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const QVector<QRect> rects = (reg & region()).rects();
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for (int i = 0; i < rects.size(); ++i) {
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const QRect r = rects.at(i);
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gl_fillbox(r.left(), r.top(), r.width(), r.height(), c);
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}
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}
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//! [4]
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void SvgalibScreen::blit16To8(const QImage &image,
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const QPoint &topLeft, const QRegion ®ion)
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{
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const int imageStride = image.bytesPerLine() / 2;
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const QVector<QRect> rects = region.rects();
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for (int i = 0; i < rects.size(); ++i) {
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const QRect r = rects.at(i).translated(-topLeft);
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int y = r.y();
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const quint16 *s = reinterpret_cast<const quint16*>(image.scanLine(y));
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while (y <= r.bottom()) {
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int x1 = r.x();
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while (x1 <= r.right()) {
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const quint16 c = s[x1];
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int x2 = x1;
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// find span length
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while ((x2+1 < r.right()) && (s[x2+1] == c))
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++x2;
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gl_hline(x1 + topLeft.x(), y + topLeft.y(), x2 + topLeft.x(),
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qt_colorConvert<quint8, quint16>(c, 0));
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x1 = x2 + 1;
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}
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s += imageStride;
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++y;
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}
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}
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}
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void SvgalibScreen::blit32To8(const QImage &image,
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const QPoint &topLeft, const QRegion ®ion)
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{
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const int imageStride = image.bytesPerLine() / 4;
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const QVector<QRect> rects = region.rects();
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for (int i = 0; i < rects.size(); ++i) {
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const QRect r = rects.at(i).translated(-topLeft);
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int y = r.y();
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const quint32 *s = reinterpret_cast<const quint32*>(image.scanLine(y));
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while (y <= r.bottom()) {
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int x1 = r.x();
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while (x1 <= r.right()) {
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const quint32 c = s[x1];
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int x2 = x1;
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// find span length
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while ((x2+1 < r.right()) && (s[x2+1] == c))
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++x2;
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gl_hline(x1 + topLeft.x(), y + topLeft.y(), x2 + topLeft.x(),
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qt_colorConvert<quint8, quint32>(c, 0));
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x1 = x2 + 1;
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}
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s += imageStride;
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++y;
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}
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}
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}
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//! [5]
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void SvgalibScreen::blit(const QImage &img, const QPoint &topLeft,
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const QRegion ®)
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{
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if (depth() == 8) {
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switch (img.format()) {
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case QImage::Format_RGB16:
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blit16To8(img, topLeft, reg);
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return;
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case QImage::Format_RGB32:
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case QImage::Format_ARGB32:
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case QImage::Format_ARGB32_Premultiplied:
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blit32To8(img, topLeft, reg);
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return;
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default:
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break;
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}
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}
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if (img.format() != pixelFormat()) {
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if (base())
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QScreen::blit(img, topLeft, reg);
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return;
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}
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const QVector<QRect> rects = (reg & region()).rects();
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for (int i = 0; i < rects.size(); ++i) {
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const QRect r = rects.at(i);
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gl_putboxpart(r.x(), r.y(), r.width(), r.height(),
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img.width(), img.height(),
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static_cast<void*>(const_cast<uchar*>(img.bits())),
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r.x() - topLeft.x(), r.y() - topLeft.y());
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}
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}
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//! [5]
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//! [7]
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QWSWindowSurface* SvgalibScreen::createSurface(QWidget *widget) const
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{
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if (base()) {
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static int onScreenPaint = -1;
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if (onScreenPaint == -1)
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onScreenPaint = qgetenv("QT_ONSCREEN_PAINT").toInt();
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if (onScreenPaint > 0 || widget->testAttribute(Qt::WA_PaintOnScreen))
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return new SvgalibSurface(widget);
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}
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return QScreen::createSurface(widget);
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}
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//! [7]
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//! [8]
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QWSWindowSurface* SvgalibScreen::createSurface(const QString &key) const
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{
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if (key == QLatin1String("svgalib"))
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return new SvgalibSurface;
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return QScreen::createSurface(key);
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}
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//! [8]
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