/**************************************************************************** ** ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the QtOpenGL module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** Commercial Usage ** Licensees holding valid Qt Commercial licenses may use this file in ** accordance with the Qt Commercial License Agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and Nokia. ** ** 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 1.1, 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 have questions regarding the use of this file, please contact ** Nokia at qt-info@nokia.com. ** $QT_END_LICENSE$ ** ****************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include QT_BEGIN_NAMESPACE class QGLCmapPrivate { public: QGLCmapPrivate() : count(1) { } void ref() { ++count; } bool deref() { return !--count; } uint count; enum AllocState{ UnAllocated = 0, Allocated = 0x01, Reserved = 0x02 }; int maxSize; QVector colorArray; QVector allocArray; QVector contextArray; QMap colorMap; }; /***************************************************************************** QColorMap class - temporarily here, until it is ready for prime time *****************************************************************************/ /**************************************************************************** ** ** Definition of QColorMap class ** ****************************************************************************/ #ifndef QGLCMAP_H #define QGLCMAP_H #include /***************************************************************************** QGLFormat Win32/WGL-specific code *****************************************************************************/ void qt_egl_add_platform_config(QEglProperties& props, QPaintDevice *device) { int devType = device->devType(); if (devType == QInternal::Image) props.setPixelFormat(static_cast(device)->format()); else props.setPixelFormat(QImage::Format_RGB16); } static bool opengl32dll = false; bool QGLFormat::hasOpenGLOverlays() { return false; // ### } bool QGLContext::chooseContext(const QGLContext* shareContext) { Q_D(QGLContext); // Validate the device. if (!device()) return false; int devType = device()->devType(); if (devType != QInternal::Pixmap && devType != QInternal::Image && devType != QInternal::Widget) { qWarning("QGLContext::chooseContext(): Cannot create QGLContext's for paint device type %d", devType); return false; } // Get the display and initialize it. d->eglContext = new QEglContext(); d->eglContext->setApi(QEgl::OpenGL); if (!d->eglContext->openDisplay(device())) { delete d->eglContext; d->eglContext = 0; return false; } // Construct the configuration we need for this surface. QEglProperties configProps; qt_egl_add_platform_config(configProps, device()); qt_egl_set_format(configProps, devType, d->glFormat); configProps.setRenderableType(QEgl::OpenGL); // Search for a matching configuration, reducing the complexity // each time until we get something that matches. if (!d->eglContext->chooseConfig(configProps)) { delete d->eglContext; d->eglContext = 0; return false; } // Inform the higher layers about the actual format properties. qt_egl_update_format(*(d->eglContext), d->glFormat); // Create a new context for the configuration. if (!d->eglContext->createContext (shareContext ? shareContext->d_func()->eglContext : 0)) { delete d->eglContext; d->eglContext = 0; return false; } d->sharing = d->eglContext->isSharing(); if (d->sharing && shareContext) const_cast(shareContext)->d_func()->sharing = true; #if defined(EGL_VERSION_1_1) if (d->glFormat.swapInterval() != -1 && devType == QInternal::Widget) eglSwapInterval(d->eglContext->display(), d->glFormat.swapInterval()); #endif // Create the EGL surface to draw into. d->eglSurface = d->eglContext->createSurface(device()); if (d->eglSurface == EGL_NO_SURFACE) { delete d->eglContext; d->eglContext = 0; return false; } return true; } static bool qLogEq(bool a, bool b) { return (((!a) && (!b)) || (a && b)); } int QGLContext::choosePixelFormat(void* , HDC ) { return 0; } class QGLCmapPrivate; class /*Q_EXPORT*/ QGLCmap { public: enum Flags { Reserved = 0x01 }; QGLCmap(int maxSize = 256); QGLCmap(const QGLCmap& map); ~QGLCmap(); QGLCmap& operator=(const QGLCmap& map); // isEmpty and/or isNull ? int size() const; int maxSize() const; void resize(int newSize); int find(QRgb color) const; int findNearest(QRgb color) const; int allocate(QRgb color, uint flags = 0, quint8 context = 0); void setEntry(int idx, QRgb color, uint flags = 0, quint8 context = 0); const QRgb* colors() const; private: void detach(); QGLCmapPrivate* d; }; #endif QGLCmap::QGLCmap(int maxSize) // add a bool prealloc? { d = new QGLCmapPrivate; d->maxSize = maxSize; } QGLCmap::QGLCmap(const QGLCmap& map) { d = map.d; d->ref(); } QGLCmap::~QGLCmap() { if (d && d->deref()) delete d; d = 0; } QGLCmap& QGLCmap::operator=(const QGLCmap& map) { map.d->ref(); if (d->deref()) delete d; d = map.d; return *this; } int QGLCmap::size() const { return d->colorArray.size(); } int QGLCmap::maxSize() const { return d->maxSize; } void QGLCmap::detach() { if (d->count != 1) { d->deref(); QGLCmapPrivate* newd = new QGLCmapPrivate; newd->maxSize = d->maxSize; newd->colorArray = d->colorArray; newd->allocArray = d->allocArray; newd->contextArray = d->contextArray; newd->colorArray.detach(); newd->allocArray.detach(); newd->contextArray.detach(); newd->colorMap = d->colorMap; d = newd; } } void QGLCmap::resize(int newSize) { if (newSize < 0 || newSize > d->maxSize) { qWarning("QGLCmap::resize(): size out of range"); return; } int oldSize = size(); detach(); //if shrinking; remove the lost elems from colorMap d->colorArray.resize(newSize); d->allocArray.resize(newSize); d->contextArray.resize(newSize); if (newSize > oldSize) { memset(d->allocArray.data() + oldSize, 0, newSize - oldSize); memset(d->contextArray.data() + oldSize, 0, newSize - oldSize); } } int QGLCmap::find(QRgb color) const { QMap::ConstIterator it = d->colorMap.find(color); if (it != d->colorMap.end()) return *it; return -1; } int QGLCmap::findNearest(QRgb color) const { int idx = find(color); if (idx >= 0) return idx; int mapSize = size(); int mindist = 200000; int r = qRed(color); int g = qGreen(color); int b = qBlue(color); int rx, gx, bx, dist; for (int i=0; i < mapSize; i++) { if (!(d->allocArray[i] & QGLCmapPrivate::Allocated)) continue; QRgb ci = d->colorArray[i]; rx = r - qRed(ci); gx = g - qGreen(ci); bx = b - qBlue(ci); dist = rx*rx + gx*gx + bx*bx; // calculate distance if (dist < mindist) { // minimal? mindist = dist; idx = i; } } return idx; } // Does not always allocate; returns existing c idx if found int QGLCmap::allocate(QRgb color, uint flags, quint8 context) { int idx = find(color); if (idx >= 0) return idx; int mapSize = d->colorArray.size(); int newIdx = d->allocArray.indexOf(QGLCmapPrivate::UnAllocated); if (newIdx < 0) { // Must allocate more room if (mapSize < d->maxSize) { newIdx = mapSize; mapSize++; resize(mapSize); } else { //# add a bool param that says what to do in case no more room - // fail (-1) or return nearest? return -1; } } d->colorArray[newIdx] = color; if (flags & QGLCmap::Reserved) { d->allocArray[newIdx] = QGLCmapPrivate::Reserved; } else { d->allocArray[newIdx] = QGLCmapPrivate::Allocated; d->colorMap.insert(color, newIdx); } d->contextArray[newIdx] = context; return newIdx; } void QGLCmap::setEntry(int idx, QRgb color, uint flags, quint8 context) { if (idx < 0 || idx >= d->maxSize) { qWarning("QGLCmap::set(): Index out of range"); return; } detach(); int mapSize = size(); if (idx >= mapSize) { mapSize = idx + 1; resize(mapSize); } d->colorArray[idx] = color; if (flags & QGLCmap::Reserved) { d->allocArray[idx] = QGLCmapPrivate::Reserved; } else { d->allocArray[idx] = QGLCmapPrivate::Allocated; d->colorMap.insert(color, idx); } d->contextArray[idx] = context; } const QRgb* QGLCmap::colors() const { return d->colorArray.data(); } /***************************************************************************** QGLWidget Win32/WGL-specific code *****************************************************************************/ void QGLWidgetPrivate::init(QGLContext *ctx, const QGLWidget* shareWidget) { Q_Q(QGLWidget); olcx = 0; initContext(ctx, shareWidget); if (q->isValid() && q->context()->format().hasOverlay()) { olcx = new QGLContext(QGLFormat::defaultOverlayFormat(), q); if (!olcx->create(shareWidget ? shareWidget->overlayContext() : 0)) { delete olcx; olcx = 0; glcx->d_func()->glFormat.setOverlay(false); } } else { olcx = 0; } } /*\internal Store color values in the given colormap. */ static void qStoreColors(HPALETTE cmap, const QGLColormap & cols) { QRgb color; PALETTEENTRY pe; for (int i = 0; i < cols.size(); i++) { color = cols.entryRgb(i); pe.peRed = qRed(color); pe.peGreen = qGreen(color); pe.peBlue = qBlue(color); pe.peFlags = 0; SetPaletteEntries(cmap, i, 1, &pe); } } void QGLWidgetPrivate::updateColormap() { Q_Q(QGLWidget); if (!cmap.handle()) return; HDC hdc = GetDC(q->winId()); SelectPalette(hdc, (HPALETTE) cmap.handle(), TRUE); qStoreColors((HPALETTE) cmap.handle(), cmap); RealizePalette(hdc); ReleaseDC(q->winId(), hdc); } bool QGLWidget::event(QEvent *e) { Q_D(QGLWidget); if (e->type() == QEvent::ParentChange) { setContext(new QGLContext(d->glcx->requestedFormat(), this)); // the overlay needs to be recreated as well delete d->olcx; if (isValid() && context()->format().hasOverlay()) { d->olcx = new QGLContext(QGLFormat::defaultOverlayFormat(), this); if (!d->olcx->create(isSharing() ? d->glcx : 0)) { delete d->olcx; d->olcx = 0; d->glcx->d_func()->glFormat.setOverlay(false); } } else { d->olcx = 0; } } else if (e->type() == QEvent::Show && !format().rgba()) { d->updateColormap(); } return QWidget::event(e); } void QGLWidget::resizeEvent(QResizeEvent *) { Q_D(QGLWidget); if (!isValid()) return; makeCurrent(); if (!d->glcx->initialized()) glInit(); resizeGL(width(), height()); if (d->olcx) { makeOverlayCurrent(); resizeOverlayGL(width(), height()); } } const QGLContext* QGLWidget::overlayContext() const { return d_func()->olcx; } void QGLWidget::makeOverlayCurrent() { Q_D(QGLWidget); if (d->olcx) { d->olcx->makeCurrent(); if (!d->olcx->initialized()) { initializeOverlayGL(); d->olcx->setInitialized(true); } } } void QGLWidget::updateOverlayGL() { Q_D(QGLWidget); if (d->olcx) { makeOverlayCurrent(); paintOverlayGL(); if (d->olcx->format().doubleBuffer()) { if (d->autoSwap) d->olcx->swapBuffers(); } else { glFlush(); } } } void QGLWidget::setContext(QGLContext *context, const QGLContext* shareContext, bool deleteOldContext) { Q_D(QGLWidget); if (context == 0) { qWarning("QGLWidget::setContext: Cannot set null context"); return; } if (!context->deviceIsPixmap() && context->device() != this) { qWarning("QGLWidget::setContext: Context must refer to this widget"); return; } if (d->glcx) d->glcx->doneCurrent(); QGLContext* oldcx = d->glcx; d->glcx = context; bool doShow = false; if (oldcx && oldcx->d_func()->win == winId() && !d->glcx->deviceIsPixmap()) { // We already have a context and must therefore create a new // window since Windows does not permit setting a new OpenGL // context for a window that already has one set. doShow = isVisible(); QWidget *pW = static_cast(parent()); QPoint pos = geometry().topLeft(); setParent(pW, windowFlags()); move(pos); } if (!d->glcx->isValid()) { d->glcx->create(shareContext ? shareContext : oldcx); // the above is a trick to keep disp lists etc when a // QGLWidget has been reparented, so remove the sharing // flag if we don't actually have a sharing context. if (!shareContext) d->glcx->d_ptr->sharing = false; } if (deleteOldContext) delete oldcx; if (doShow) show(); } void QGLWidgetPrivate::cleanupColormaps() { Q_Q(QGLWidget); if (cmap.handle()) { HDC hdc = GetDC(q->winId()); SelectPalette(hdc, (HPALETTE) GetStockObject(DEFAULT_PALETTE), FALSE); DeleteObject((HPALETTE) cmap.handle()); ReleaseDC(q->winId(), hdc); cmap.setHandle(0); } return; } const QGLColormap & QGLWidget::colormap() const { return d_func()->cmap; } void QGLWidget::setColormap(const QGLColormap & c) { Q_D(QGLWidget); d->cmap = c; if (d->cmap.handle()) { // already have an allocated cmap d->updateColormap(); } else { LOGPALETTE *lpal = (LOGPALETTE *) malloc(sizeof(LOGPALETTE) +c.size()*sizeof(PALETTEENTRY)); lpal->palVersion = 0x300; lpal->palNumEntries = c.size(); d->cmap.setHandle(CreatePalette(lpal)); free(lpal); d->updateColormap(); } } void QGLExtensions::init() { static bool init_done = false; if (init_done) return; init_done = true; // We need a context current to initialize the extensions. QGLWidget tmpWidget; tmpWidget.makeCurrent(); init_extensions(); tmpWidget.doneCurrent(); } QT_END_NAMESPACE