diff options
Diffstat (limited to 'src/plugins/graphicssystems/shivavg/shivavgwindowsurface.cpp')
| -rw-r--r-- | src/plugins/graphicssystems/shivavg/shivavgwindowsurface.cpp | 370 |
1 files changed, 370 insertions, 0 deletions
diff --git a/src/plugins/graphicssystems/shivavg/shivavgwindowsurface.cpp b/src/plugins/graphicssystems/shivavg/shivavgwindowsurface.cpp new file mode 100644 index 0000000..bf1f942 --- /dev/null +++ b/src/plugins/graphicssystems/shivavg/shivavgwindowsurface.cpp @@ -0,0 +1,370 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the plugins 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 http://www.qtsoftware.com/contact. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#define GL_GLEXT_PROTOTYPES +#include "shivavgwindowsurface.h" +#include <QtOpenVG/private/qpaintengine_vg_p.h> +#if defined(Q_WS_X11) +#include "private/qt_x11_p.h" +#include "qx11info_x11.h" +#include <GL/glx.h> + +extern QX11Info *qt_x11Info(const QPaintDevice *pd); +#endif + +// Define this to use framebuffer objects. +//#define QVG_USE_FBO 1 + +#include <vg/openvg.h> + +QT_BEGIN_NAMESPACE + +class QShivaContext +{ +public: + QShivaContext(); + ~QShivaContext(); + + bool makeCurrent(ShivaVGWindowSurfacePrivate *surface); + void doneCurrent(); + + bool initialized; + QSize currentSize; + ShivaVGWindowSurfacePrivate *currentSurface; +}; + +Q_GLOBAL_STATIC(QShivaContext, shivaContext); + +class ShivaVGWindowSurfacePrivate +{ +public: + ShivaVGWindowSurfacePrivate() + : isCurrent(false) + , needsResize(true) + , engine(0) +#if defined(QVG_USE_FBO) + , fbo(0) + , texture(0) +#endif +#if defined(Q_WS_X11) + , drawable(0) + , context(0) +#endif + { + } + ~ShivaVGWindowSurfacePrivate(); + + void ensureContext(QWidget *widget); + + QSize size; + bool isCurrent; + bool needsResize; + QVGPaintEngine *engine; +#if defined(QVG_USE_FBO) + GLuint fbo; + GLuint texture; +#endif +#if defined(Q_WS_X11) + GLXDrawable drawable; + GLXContext context; +#endif +}; + +QShivaContext::QShivaContext() + : initialized(false) + , currentSurface(0) +{ +} + +QShivaContext::~QShivaContext() +{ + if (initialized) + vgDestroyContextSH(); +} + +bool QShivaContext::makeCurrent(ShivaVGWindowSurfacePrivate *surface) +{ + if (currentSurface) + currentSurface->isCurrent = false; + surface->isCurrent = true; + currentSurface = surface; + currentSize = surface->size; +#if defined(Q_WS_X11) + glXMakeCurrent(X11->display, surface->drawable, surface->context); +#endif + if (!initialized) { + if (!vgCreateContextSH(currentSize.width(), currentSize.height())) { + qWarning("vgCreateContextSH(%d, %d): could not create context", currentSize.width(), currentSize.height()); + return false; + } + initialized = true; + } else { + vgResizeSurfaceSH(currentSize.width(), currentSize.height()); + } +#if defined(QVG_USE_FBO) + if (surface->fbo) + glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, surface->fbo); + else + glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0); +#endif + return true; +} + +void QShivaContext::doneCurrent() +{ + if (currentSurface) { + currentSurface->isCurrent = false; + currentSurface = 0; + } +#if defined(Q_WS_X11) + glXMakeCurrent(X11->display, 0, 0); +#endif +} + +ShivaVGWindowSurfacePrivate::~ShivaVGWindowSurfacePrivate() +{ +#if defined(QVG_USE_FBO) + if (fbo) { + glDeleteTextures(1, &texture); + glDeleteFramebuffersEXT(1, &fbo); + } +#endif +} + +void ShivaVGWindowSurfacePrivate::ensureContext(QWidget *widget) +{ +#if defined(Q_WS_X11) + Window win = widget->winId(); + if (win != drawable) { + if (context) + glXDestroyContext(X11->display, context); + drawable = win; + } + if (context == 0) { + const QX11Info *xinfo = qt_x11Info(widget); + int spec[64]; + int i = 0; + spec[i++] = GLX_DOUBLEBUFFER; + spec[i++] = GLX_DEPTH_SIZE; + spec[i++] = 1; + spec[i++] = GLX_STENCIL_SIZE; + spec[i++] = 1; + spec[i++] = GLX_RGBA; + spec[i++] = GLX_RED_SIZE; + spec[i++] = 1; + spec[i++] = GLX_GREEN_SIZE; + spec[i++] = 1; + spec[i++] = GLX_BLUE_SIZE; + spec[i++] = 1; + spec[i++] = GLX_SAMPLE_BUFFERS_ARB; + spec[i++] = 1; + spec[i++] = GLX_SAMPLES_ARB; + spec[i++] = 4; + spec[i] = XNone; + XVisualInfo *visual = glXChooseVisual + (xinfo->display(), xinfo->screen(), spec); + context = glXCreateContext(X11->display, visual, 0, True); + if (!context) + qWarning("glXCreateContext: could not create GL context for VG rendering"); + } +#else + Q_UNUSED(widget); +#endif +#if defined(QVG_USE_FBO) + if (needsResize && fbo) { +#if defined(Q_WS_X11) + glXMakeCurrent(X11->display, drawable, context); +#endif + glDeleteTextures(1, &texture); + glDeleteFramebuffersEXT(1, &fbo); +#if defined(Q_WS_X11) + glXMakeCurrent(X11->display, 0, 0); +#endif + fbo = 0; + texture = 0; + } + if (!fbo) { +#if defined(Q_WS_X11) + glXMakeCurrent(X11->display, drawable, context); +#endif + glGenFramebuffersEXT(1, &fbo); + glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo); + + glGenTextures(1, &texture); + glBindTexture(GL_TEXTURE_2D, texture); + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, size.width(), size.height(), 0, + GL_RGBA, GL_UNSIGNED_BYTE, NULL); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); + glFramebufferTexture2DEXT + (GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, + texture, 0); + + glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0); +#if defined(Q_WS_X11) + glXMakeCurrent(X11->display, 0, 0); +#endif + } +#endif + needsResize = false; +} + +ShivaVGWindowSurface::ShivaVGWindowSurface(QWidget *window) + : QWindowSurface(window), d_ptr(new ShivaVGWindowSurfacePrivate) +{ +} + +ShivaVGWindowSurface::~ShivaVGWindowSurface() +{ + if (d_ptr->isCurrent) { + shivaContext()->doneCurrent(); + glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0); + } +#if defined(Q_WS_X11) + if (d_ptr->context) + glXDestroyContext(X11->display, d_ptr->context); +#endif + delete d_ptr; +} + +QPaintDevice *ShivaVGWindowSurface::paintDevice() +{ + d_ptr->ensureContext(window()); + shivaContext()->makeCurrent(d_ptr); + glClearDepth(0.0f); + glClear(GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT); + return this; +} + +void ShivaVGWindowSurface::flush(QWidget *widget, const QRegion ®ion, const QPoint &offset) +{ + Q_UNUSED(region); + Q_UNUSED(offset); + QWidget *parent = widget->internalWinId() ? widget : widget->nativeParentWidget(); + d_ptr->ensureContext(parent); + QShivaContext *context = shivaContext(); + if (!d_ptr->isCurrent) + context->makeCurrent(d_ptr); +#if defined(QVG_USE_FBO) + glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0); + if (d_ptr->fbo) { + static GLfloat const vertices[][2] = { + {-1, -1}, {1, -1}, {1, 1}, {-1, 1} + }; + static GLfloat const texCoords[][2] = { + {0, 0}, {1, 0}, {1, 1}, {0, 1} + }; + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); + glVertexPointer(2, GL_FLOAT, 0, vertices); + glTexCoordPointer(2, GL_FLOAT, 0, texCoords); + glBindTexture(GL_TEXTURE_2D, d_ptr->texture); + glEnable(GL_TEXTURE_2D); + glEnableClientState(GL_VERTEX_ARRAY); + glEnableClientState(GL_TEXTURE_COORD_ARRAY); + glDrawArrays(GL_TRIANGLE_FAN, 0, 4); + glDisableClientState(GL_TEXTURE_COORD_ARRAY); + glDisableClientState(GL_VERTEX_ARRAY); + glDisable(GL_TEXTURE_2D); + glBindTexture(GL_TEXTURE_2D, 0); + } +#endif +#if defined(Q_WS_X11) + glXSwapBuffers(X11->display, d_ptr->drawable); +#endif + context->doneCurrent(); +} + +void ShivaVGWindowSurface::setGeometry(const QRect &rect) +{ + QWindowSurface::setGeometry(rect); + d_ptr->needsResize = true; + d_ptr->size = rect.size(); +} + +bool ShivaVGWindowSurface::scroll(const QRegion &area, int dx, int dy) +{ + return QWindowSurface::scroll(area, dx, dy); +} + +void ShivaVGWindowSurface::beginPaint(const QRegion ®ion) +{ + // Nothing to do here. + Q_UNUSED(region); +} + +void ShivaVGWindowSurface::endPaint(const QRegion ®ion) +{ + // Nothing to do here. + Q_UNUSED(region); +} + +Q_GLOBAL_STATIC(QVGPaintEngine, sharedPaintEngine); + +QPaintEngine *ShivaVGWindowSurface::paintEngine() const +{ + if (!d_ptr->engine) + d_ptr->engine = sharedPaintEngine(); + return d_ptr->engine; +} + +// We need to get access to QWidget::metric() from ShivaVGWindowSurface::metric, +// but it is not a friend of QWidget. To get around this, we create a +// fake QX11PaintEngine class, which is a friend. +class QX11PaintEngine +{ +public: + static int metric(const QWidget *widget, QPaintDevice::PaintDeviceMetric met) + { + return widget->metric(met); + } +}; + +int ShivaVGWindowSurface::metric(PaintDeviceMetric met) const +{ + return QX11PaintEngine::metric(window(), met); +} + +QT_END_NAMESPACE |