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Diffstat (limited to 'src/openvg/qpixmapfilter_vg.cpp')
-rw-r--r-- | src/openvg/qpixmapfilter_vg.cpp | 340 |
1 files changed, 340 insertions, 0 deletions
diff --git a/src/openvg/qpixmapfilter_vg.cpp b/src/openvg/qpixmapfilter_vg.cpp new file mode 100644 index 0000000..ff8604b --- /dev/null +++ b/src/openvg/qpixmapfilter_vg.cpp @@ -0,0 +1,340 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtOpenVG module 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. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qpixmapfilter_vg_p.h" +#include <QtCore/qvarlengtharray.h> +#include <QtGui/qpainter.h> + +QT_BEGIN_NAMESPACE + +#if !defined(QT_SHIVAVG) + +QVGPixmapConvolutionFilter::QVGPixmapConvolutionFilter() + : QPixmapConvolutionFilter() +{ +} + +QVGPixmapConvolutionFilter::~QVGPixmapConvolutionFilter() +{ +} + +extern void qt_vg_drawVGImage + (QPainter *painter, const QPointF& pos, VGImage vgImg); + +void QVGPixmapConvolutionFilter::draw + (QPainter *painter, const QPointF &dest, + const QPixmap &src, const QRectF &srcRect) const +{ + if (src.pixmapData()->classId() != QPixmapData::OpenVGClass) { + // The pixmap data is not an instance of QVGPixmapData, so fall + // back to the default convolution filter implementation. + QPixmapConvolutionFilter::draw(painter, dest, src, srcRect); + return; + } + + QVGPixmapData *pd = static_cast<QVGPixmapData *>(src.pixmapData()); + + VGImage srcImage = pd->toVGImage(); + if (srcImage == VG_INVALID_HANDLE) + return; + + QSize size = pd->size(); + VGImage dstImage = vgCreateImage + (VG_sARGB_8888_PRE, size.width(), size.height(), + VG_IMAGE_QUALITY_FASTER); + if (dstImage == VG_INVALID_HANDLE) + return; + + int kernelWidth = rows(); + int kernelHeight = columns(); + const qreal *kern = convolutionKernel(); + QVarLengthArray<VGshort> kernel; + for (int i = 0; i < kernelWidth; ++i) { + for (int j = 0; j < kernelHeight; ++j) { + kernel.append((VGshort)(kern[j * kernelWidth + i] * 1024.0f)); + } + } + + VGfloat values[4]; + values[0] = 0.0f; + values[1] = 0.0f; + values[2] = 0.0f; + values[3] = 0.0f; + vgSetfv(VG_TILE_FILL_COLOR, 4, values); + + vgConvolve(dstImage, srcImage, + kernelWidth, kernelHeight, 0, 0, + kernel.constData(), 1.0f / 1024.0f, 0.0f, + VG_TILE_FILL); + + VGImage child = VG_INVALID_HANDLE; + + if (srcRect.isNull() || + (srcRect.topLeft().isNull() && srcRect.size() == size)) { + child = dstImage; + } else { + QRect src = srcRect.toRect(); + child = vgChildImage(dstImage, src.x(), src.y(), src.width(), src.height()); + } + + qt_vg_drawVGImage(painter, dest, child); + + if(child != dstImage) + vgDestroyImage(child); + vgDestroyImage(dstImage); +} + +QVGPixmapColorizeFilter::QVGPixmapColorizeFilter() + : QPixmapColorizeFilter(), + firstTime(true) +{ +} + +QVGPixmapColorizeFilter::~QVGPixmapColorizeFilter() +{ +} + +void QVGPixmapColorizeFilter::draw(QPainter *painter, const QPointF &dest, const QPixmap &src, const QRectF &srcRect) const +{ + if (src.pixmapData()->classId() != QPixmapData::OpenVGClass) { + // The pixmap data is not an instance of QVGPixmapData, so fall + // back to the default convolution filter implementation. + QPixmapColorizeFilter::draw(painter, dest, src, srcRect); + return; + } + + QVGPixmapData *pd = static_cast<QVGPixmapData *>(src.pixmapData()); + + VGImage srcImage = pd->toVGImage(); + if (srcImage == VG_INVALID_HANDLE) + return; + + QSize size = pd->size(); + VGImage dstImage = vgCreateImage + (VG_sARGB_8888_PRE, size.width(), size.height(), + VG_IMAGE_QUALITY_FASTER); + if (dstImage == VG_INVALID_HANDLE) + return; + + // Recompute the color matrix if the color has changed. + QColor c = color(); + if (c != prevColor || firstTime) { + prevColor = c; + + // Determine the weights for the matrix from the color. + VGfloat weights[3]; + VGfloat invweights[3]; + VGfloat alpha = c.alphaF(); + weights[0] = c.redF() * alpha; + weights[1] = c.greenF() * alpha; + weights[2] = c.blueF() * alpha; + invweights[0] = 1.0f - weights[0]; + invweights[1] = 1.0f - weights[1]; + invweights[2] = 1.0f - weights[2]; + + // Grayscale weights. + static const VGfloat redGray = 11.0f / 32.0f; + static const VGfloat greenGray = 16.0f / 32.0f; + static const VGfloat blueGray = 1.0f - (redGray + greenGray); + + matrix[0][0] = redGray * invweights[0]; + matrix[0][1] = redGray * invweights[1]; + matrix[0][2] = redGray * invweights[2]; + matrix[0][3] = 0.0f; + matrix[1][0] = greenGray * invweights[0]; + matrix[1][1] = greenGray * invweights[1]; + matrix[1][2] = greenGray * invweights[2]; + matrix[1][3] = 0.0f; + matrix[2][0] = blueGray * invweights[0]; + matrix[2][1] = blueGray * invweights[1]; + matrix[2][2] = blueGray * invweights[2]; + matrix[2][3] = 0.0f; + matrix[3][0] = 0.0f; + matrix[3][1] = 0.0f; + matrix[3][2] = 0.0f; + matrix[3][3] = 1.0f; + matrix[4][0] = weights[0]; + matrix[4][1] = weights[1]; + matrix[4][2] = weights[2]; + matrix[4][3] = 0.0f; + } + + firstTime = false; + + vgColorMatrix(dstImage, srcImage, matrix[0]); + + VGImage child = VG_INVALID_HANDLE; + + if (srcRect.isNull() || + (srcRect.topLeft().isNull() && srcRect.size() == size)) { + child = dstImage; + } else { + QRect src = srcRect.toRect(); + child = vgChildImage(dstImage, src.x(), src.y(), src.width(), src.height()); + } + + qt_vg_drawVGImage(painter, dest, child); + + if(child != dstImage) + vgDestroyImage(child); + vgDestroyImage(dstImage); +} + +QVGPixmapDropShadowFilter::QVGPixmapDropShadowFilter() + : QPixmapDropShadowFilter(), + prevRadius(0.0f), + kernelSize(0), + firstTime(true) +{ +} + +QVGPixmapDropShadowFilter::~QVGPixmapDropShadowFilter() +{ +} + +void QVGPixmapDropShadowFilter::draw(QPainter *painter, const QPointF &dest, const QPixmap &src, const QRectF &srcRect) const +{ + if (src.pixmapData()->classId() != QPixmapData::OpenVGClass) { + // The pixmap data is not an instance of QVGPixmapData, so fall + // back to the default drop shadow filter implementation. + QPixmapDropShadowFilter::draw(painter, dest, src, srcRect); + return; + } + + QVGPixmapData *pd = static_cast<QVGPixmapData *>(src.pixmapData()); + + VGImage srcImage = pd->toVGImage(); + if (srcImage == VG_INVALID_HANDLE) + return; + + QSize size = pd->size(); + VGImage tmpImage = vgCreateImage + (VG_sARGB_8888_PRE, size.width(), size.height(), + VG_IMAGE_QUALITY_FASTER); + if (tmpImage == VG_INVALID_HANDLE) + return; + + VGImage dstImage = vgCreateImage + (VG_sARGB_8888_PRE, size.width(), size.height(), + VG_IMAGE_QUALITY_FASTER); + if (dstImage == VG_INVALID_HANDLE) { + vgDestroyImage(tmpImage); + return; + } + + // Recompute the color matrix if the color has changed. + QColor c = color(); + if (c != prevColor || firstTime) { + prevColor = c; + + matrix[0][0] = 0.0f; + matrix[0][1] = 0.0f; + matrix[0][2] = 0.0f; + matrix[0][3] = 0.0f; + matrix[1][0] = 0.0f; + matrix[1][1] = 0.0f; + matrix[1][2] = 0.0f; + matrix[1][3] = 0.0f; + matrix[2][0] = 0.0f; + matrix[2][1] = 0.0f; + matrix[2][2] = 0.0f; + matrix[2][3] = 0.0f; + matrix[3][0] = c.redF(); + matrix[3][1] = c.greenF(); + matrix[3][2] = c.blueF(); + matrix[3][3] = c.alphaF(); + matrix[4][0] = 0.0f; + matrix[4][1] = 0.0f; + matrix[4][2] = 0.0f; + matrix[4][3] = 0.0f; + } + + // Blacken the source image. + vgColorMatrix(tmpImage, srcImage, matrix[0]); + + // Recompute the convolution kernel if the blur radius has changed. + qreal radius = blurRadius(); + if (radius != prevRadius || firstTime) { + prevRadius = radius; + int dim = 2 * qRound(radius) + 1; + int size = dim * dim; + VGshort f = VGshort(1024.0f / size); + kernel.resize(size); + for (int i = 0; i < size; ++i) + kernel[i] = f; + kernelSize = dim; + } + + // Apply the convolution filter using the kernel. + VGfloat values[4]; + values[0] = 0.0f; + values[1] = 0.0f; + values[2] = 0.0f; + values[3] = 0.0f; + vgSetfv(VG_TILE_FILL_COLOR, 4, values); + vgConvolve(dstImage, tmpImage, + kernelSize, kernelSize, 0, 0, + kernel.constData(), 1.0f / 1024.0f, 0.0f, + VG_TILE_FILL); + + firstTime = false; + + VGImage child = VG_INVALID_HANDLE; + + if (srcRect.isNull() || + (srcRect.topLeft().isNull() && srcRect.size() == size)) { + child = dstImage; + } else { + QRect src = srcRect.toRect(); + child = vgChildImage(dstImage, src.x(), src.y(), src.width(), src.height()); + } + + qt_vg_drawVGImage(painter, dest + offset(), child); + + if(child != dstImage) + vgDestroyImage(child); + vgDestroyImage(tmpImage); + vgDestroyImage(dstImage); +} + +#endif + +QT_END_NAMESPACE |