| [556] | 1 | /****************************************************************************
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| 2 | **
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| [846] | 3 | ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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| [556] | 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation ([email protected])
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| 6 | **
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| 7 | ** This file is part of the examples of the Qt Toolkit.
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| 8 | **
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| [846] | 9 | ** $QT_BEGIN_LICENSE:BSD$
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| 10 | ** You may use this file under the terms of the BSD license as follows:
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| [556] | 11 | **
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| [846] | 12 | ** "Redistribution and use in source and binary forms, with or without
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| 13 | ** modification, are permitted provided that the following conditions are
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| 14 | ** met:
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| 15 | ** * Redistributions of source code must retain the above copyright
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| 16 | ** notice, this list of conditions and the following disclaimer.
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| 17 | ** * Redistributions in binary form must reproduce the above copyright
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| 18 | ** notice, this list of conditions and the following disclaimer in
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| 19 | ** the documentation and/or other materials provided with the
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| 20 | ** distribution.
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| 21 | ** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
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| 22 | ** the names of its contributors may be used to endorse or promote
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| 23 | ** products derived from this software without specific prior written
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| 24 | ** permission.
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| [556] | 25 | **
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| [846] | 26 | ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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| 27 | ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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| 28 | ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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| 29 | ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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| 30 | ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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| 31 | ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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| 32 | ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 33 | ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 34 | ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 35 | ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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| 36 | ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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| [556] | 37 | ** $QT_END_LICENSE$
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| 38 | **
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| 39 | ****************************************************************************/
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| 40 |
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| 41 | #include "svgalibscreen.h"
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| 42 | #include "svgalibsurface.h"
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| 43 |
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| 44 | #include <QVector>
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| 45 | #include <QApplication>
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| 46 | #include <QColor>
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| 47 | #include <QWidget>
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| 48 |
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| 49 | #include <math.h>
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| 50 |
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| 51 | static int getModeDepth(vga_modeinfo *mode)
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| 52 | {
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| 53 | const int bits = int(log2(mode->colors));
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| 54 | if (bits == 24 && mode->bytesperpixel == 4)
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| 55 | return 32;
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| 56 | return bits;
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| 57 | }
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| 58 |
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| 59 | //! [0]
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| 60 | bool SvgalibScreen::connect(const QString &displaySpec)
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| 61 | {
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| 62 | int mode = vga_getdefaultmode();
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| 63 | if (mode <= 0) {
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| 64 | qCritical("SvgalibScreen::connect(): invalid vga mode");
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| 65 | return false;
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| 66 | }
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| 67 |
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| 68 | vga_modeinfo *modeinfo = vga_getmodeinfo(mode);
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| 69 |
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| 70 | QScreen::lstep = modeinfo->linewidth;
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| 71 | QScreen::dw = QScreen::w = modeinfo->width;
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| 72 | QScreen::dh = QScreen::h = modeinfo->height;
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| 73 | QScreen::d = getModeDepth(modeinfo);
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| 74 | QScreen::size = QScreen::lstep * dh;
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| 75 | QScreen::data = 0;
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| 76 |
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| 77 | switch (depth()) {
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| 78 | case 32:
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| 79 | setPixelFormat(QImage::Format_ARGB32_Premultiplied);
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| 80 | break;
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| 81 | case 24:
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| 82 | setPixelFormat(QImage::Format_RGB888);
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| 83 | break;
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| 84 | case 16:
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| 85 | setPixelFormat(QImage::Format_RGB16);
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| 86 | break;
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| 87 | case 15:
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| 88 | setPixelFormat(QImage::Format_RGB555);
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| 89 | break;
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| 90 | default:
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| 91 | break;
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| 92 | }
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| 93 |
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| 94 | const int dpi = 72;
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| 95 | QScreen::physWidth = qRound(QScreen::dw * 25.4 / dpi);
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| 96 | QScreen::physHeight = qRound(QScreen::dh * 25.4 / dpi);
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| 97 |
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| 98 | const QStringList args = displaySpec.split(QLatin1Char(':'),
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| 99 | QString::SkipEmptyParts);
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| 100 | grayscale = args.contains(QLatin1String("grayscale"), Qt::CaseInsensitive);
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| 101 |
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| 102 | return true;
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| 103 | }
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| 104 | //! [0]
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| 105 |
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| 106 | void SvgalibScreen::initColorMap()
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| 107 | {
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| 108 | const int numColors = vga_getcolors();
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| 109 | if (numColors == 2 || numColors > 256) {
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| 110 | screencols = 0;
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| 111 | return; // not a palette based mode
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| 112 | }
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| 113 |
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| 114 | if (numColors == 16) {
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| 115 | if (grayscale) {
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| 116 | for (int i = 0; i < 256; ++i) {
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| 117 | const int c = i * 16 / 256;
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| 118 | vga_setpalette(i, c, c, c);
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| 119 | }
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| 120 | screencols = 256; // XXX: takes advantage of optimization in alloc()
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| 121 | } else { // read in EGA palette
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| 122 | int r, g, b;
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| 123 | for (int i = 0; i < 16; ++i) {
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| 124 | vga_getpalette(i, &r, &g, &b);
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| 125 | screenclut[i] = qRgb(r, g, b);
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| 126 | }
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| 127 | screencols = 16;
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| 128 | }
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| 129 |
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| 130 | return;
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| 131 | }
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| 132 |
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| 133 | Q_ASSERT(numColors == 256);
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| 134 |
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| 135 | if (grayscale) {
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| 136 | for (int i = 0; i < 256; ++i) {
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| 137 | const int c = i * 64 / 256;
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| 138 | vga_setpalette(i, c, c, c);
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| 139 | }
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| 140 | } else {
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| 141 | int i = 0;
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| 142 |
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| 143 | #if 0
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| 144 | // read in EGA palette
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| 145 | while (i < 16) {
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| 146 | int r, g, b;
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| 147 | vga_getpalette(i, &r, &g, &b);
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| 148 | screenclut[i] = qRgb(r, g, b);
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| 149 | ++i;
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| 150 | }
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| 151 | screencols = 16;
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| 152 | #endif
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| 153 |
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| 154 | // 6 * 6 * 6 color cube
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| 155 | for (int r = 0; r < 6; ++r) {
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| 156 | for (int g = 0; g < 6; ++g) {
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| 157 | for (int b = 0; b < 6; ++b) {
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| 158 | vga_setpalette(i, r * 64/6, g * 64/6, b * 64/6);
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| 159 | screenclut[i] = qRgb(r * 256/6, g * 256/6, b * 256/6);
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| 160 | ++i;
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| 161 | }
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| 162 | }
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| 163 | }
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| 164 | screencols = i;
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| 165 |
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| 166 | while (i < 256) {
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| 167 | screenclut[i] = qRgb(0, 0, 0);
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| 168 | ++i;
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| 169 | }
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| 170 | }
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| 171 | }
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| 172 |
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| 173 | //! [1]
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| 174 | bool SvgalibScreen::initDevice()
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| 175 | {
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| 176 | if (vga_init() != 0) {
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| 177 | qCritical("SvgalibScreen::initDevice(): unable to initialize svgalib");
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| 178 | return false;
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| 179 | }
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| 180 |
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| 181 | int mode = vga_getdefaultmode();
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| 182 | if (vga_setmode(mode) == -1) {
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| 183 | qCritical("SvgalibScreen::initialize(): unable to set graphics mode");
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| 184 | return false;
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| 185 | }
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| 186 |
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| 187 | if (gl_setcontextvga(mode) != 0) {
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| 188 | qCritical("SvgalibScreen::initDevice(): unable to set vga context");
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| 189 | return false;
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| 190 | }
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| 191 | context = gl_allocatecontext();
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| 192 | gl_getcontext(context);
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| 193 |
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| 194 | vga_modeinfo *modeinfo = vga_getmodeinfo(mode);
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| 195 | if (modeinfo->flags & IS_LINEAR)
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| 196 | QScreen::data = vga_getgraphmem();
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| 197 |
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| 198 | initColorMap();
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| 199 |
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| 200 | QScreenCursor::initSoftwareCursor();
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| 201 | return true;
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| 202 | }
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| 203 | //! [1]
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| 204 |
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| 205 | //! [2]
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| 206 | void SvgalibScreen::shutdownDevice()
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| 207 | {
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| 208 | gl_freecontext(context);
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| 209 | vga_setmode(TEXT);
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| 210 | }
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| 211 | //! [2]
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| 212 |
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| 213 | //! [3]
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| 214 | void SvgalibScreen::disconnect()
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| 215 | {
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| 216 | }
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| 217 | //! [3]
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| 218 |
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| 219 | //! [4]
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| 220 | void SvgalibScreen::solidFill(const QColor &color, const QRegion ®)
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| 221 | {
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| 222 | int c;
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| 223 | if (depth() == 4 || depth() == 8)
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| 224 | c = alloc(color.red(), color.green(), color.blue());
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| 225 | else
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| 226 | c = gl_rgbcolor(color.red(), color.green(), color.blue());
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| 227 |
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| 228 | const QVector<QRect> rects = (reg & region()).rects();
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| 229 | for (int i = 0; i < rects.size(); ++i) {
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| 230 | const QRect r = rects.at(i);
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| 231 | gl_fillbox(r.left(), r.top(), r.width(), r.height(), c);
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| 232 | }
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| 233 | }
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| 234 | //! [4]
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| 235 |
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| 236 | void SvgalibScreen::blit16To8(const QImage &image,
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| 237 | const QPoint &topLeft, const QRegion ®ion)
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| 238 | {
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| 239 | const int imageStride = image.bytesPerLine() / 2;
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| 240 | const QVector<QRect> rects = region.rects();
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| 241 |
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| 242 | for (int i = 0; i < rects.size(); ++i) {
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| 243 | const QRect r = rects.at(i).translated(-topLeft);
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| 244 | int y = r.y();
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| 245 | const quint16 *s = reinterpret_cast<const quint16*>(image.scanLine(y));
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| 246 |
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| 247 | while (y <= r.bottom()) {
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| 248 | int x1 = r.x();
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| 249 | while (x1 <= r.right()) {
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| 250 | const quint16 c = s[x1];
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| 251 | int x2 = x1;
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| 252 | // find span length
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| 253 | while ((x2+1 < r.right()) && (s[x2+1] == c))
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| 254 | ++x2;
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| 255 | gl_hline(x1 + topLeft.x(), y + topLeft.y(), x2 + topLeft.x(),
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| 256 | qt_colorConvert<quint8, quint16>(c, 0));
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| 257 | x1 = x2 + 1;
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| 258 | }
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| 259 | s += imageStride;
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| 260 | ++y;
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| 261 | }
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| 262 | }
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| 263 | }
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| 264 |
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| 265 | void SvgalibScreen::blit32To8(const QImage &image,
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| 266 | const QPoint &topLeft, const QRegion ®ion)
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| 267 | {
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| 268 | const int imageStride = image.bytesPerLine() / 4;
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| 269 | const QVector<QRect> rects = region.rects();
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| 270 |
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| 271 | for (int i = 0; i < rects.size(); ++i) {
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| 272 | const QRect r = rects.at(i).translated(-topLeft);
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| 273 | int y = r.y();
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| 274 | const quint32 *s = reinterpret_cast<const quint32*>(image.scanLine(y));
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| 275 |
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| 276 | while (y <= r.bottom()) {
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| 277 | int x1 = r.x();
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| 278 | while (x1 <= r.right()) {
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| 279 | const quint32 c = s[x1];
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| 280 | int x2 = x1;
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| 281 | // find span length
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| 282 | while ((x2+1 < r.right()) && (s[x2+1] == c))
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| 283 | ++x2;
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| 284 | gl_hline(x1 + topLeft.x(), y + topLeft.y(), x2 + topLeft.x(),
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| 285 | qt_colorConvert<quint8, quint32>(c, 0));
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| 286 | x1 = x2 + 1;
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| 287 | }
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| 288 | s += imageStride;
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| 289 | ++y;
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| 290 | }
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| 291 | }
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| 292 | }
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| 293 |
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| 294 | //! [5]
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| 295 | void SvgalibScreen::blit(const QImage &img, const QPoint &topLeft,
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| 296 | const QRegion ®)
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| 297 | {
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| 298 | if (depth() == 8) {
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| 299 | switch (img.format()) {
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| 300 | case QImage::Format_RGB16:
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| 301 | blit16To8(img, topLeft, reg);
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| 302 | return;
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| 303 | case QImage::Format_RGB32:
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| 304 | case QImage::Format_ARGB32:
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| 305 | case QImage::Format_ARGB32_Premultiplied:
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| 306 | blit32To8(img, topLeft, reg);
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| 307 | return;
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| 308 | default:
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| 309 | break;
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| 310 | }
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| 311 | }
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| 312 |
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| 313 | if (img.format() != pixelFormat()) {
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| 314 | if (base())
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| 315 | QScreen::blit(img, topLeft, reg);
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| 316 | return;
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| 317 | }
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| 318 |
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| 319 | const QVector<QRect> rects = (reg & region()).rects();
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| 320 |
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| 321 | for (int i = 0; i < rects.size(); ++i) {
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| 322 | const QRect r = rects.at(i);
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| 323 | gl_putboxpart(r.x(), r.y(), r.width(), r.height(),
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| 324 | img.width(), img.height(),
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| 325 | static_cast<void*>(const_cast<uchar*>(img.bits())),
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| 326 | r.x() - topLeft.x(), r.y() - topLeft.y());
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| 327 | }
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| 328 | }
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| 329 | //! [5]
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| 330 |
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| 331 | //! [7]
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| 332 | QWSWindowSurface* SvgalibScreen::createSurface(QWidget *widget) const
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| 333 | {
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| 334 | if (base()) {
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| 335 | static int onScreenPaint = -1;
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| 336 | if (onScreenPaint == -1)
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| 337 | onScreenPaint = qgetenv("QT_ONSCREEN_PAINT").toInt();
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| 338 |
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| 339 | if (onScreenPaint > 0 || widget->testAttribute(Qt::WA_PaintOnScreen))
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| 340 | return new SvgalibSurface(widget);
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| 341 | }
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| 342 | return QScreen::createSurface(widget);
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| 343 | }
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| 344 | //! [7]
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| 345 |
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| 346 | //! [8]
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| 347 | QWSWindowSurface* SvgalibScreen::createSurface(const QString &key) const
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| 348 | {
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| 349 | if (key == QLatin1String("svgalib"))
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| 350 | return new SvgalibSurface;
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| 351 | return QScreen::createSurface(key);
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| 352 | }
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| 353 | //! [8]
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