Image drawing example.

11 files changed, 404 insertions, 1 deletions

diff --git a/examples/opencl/imagedrawing/beavis.jpg b/examples/opencl/imagedrawing/beavis.jpg
new file mode 100644
index 0000000..5fa32e4
--- /dev/null
+++ b/examples/opencl/imagedrawing/beavis.jpg
diff --git a/examples/opencl/imagedrawing/bg1.jpg b/examples/opencl/imagedrawing/bg1.jpg
new file mode 100644
index 0000000..dfc7cee
--- /dev/null
+++ b/examples/opencl/imagedrawing/bg1.jpg
diff --git a/examples/opencl/imagedrawing/flower.jpg b/examples/opencl/imagedrawing/flower.jpg
new file mode 100644
index 0000000..f8e022c
--- /dev/null
+++ b/examples/opencl/imagedrawing/flower.jpg
diff --git a/examples/opencl/imagedrawing/imagedrawing.cl b/examples/opencl/imagedrawing/imagedrawing.cl
new file mode 100644
index 0000000..8cf859d
--- /dev/null
+++ b/examples/opencl/imagedrawing/imagedrawing.cl
@@ -0,0 +1,77 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt3D 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+__kernel void fillRectWithColor
+    (__write_only image2d_t dstImage,
+     int offsetX, int offsetY, int limitX, int limitY,
+     float4 color)
+{
+    int x = get_global_id(0) + offsetX;
+    int y = get_global_id(1) + offsetY;
+    if (x < limitX && y < limitY)
+        write_imagef(dstImage, (int2)(x, y), color);
+}
+
+const sampler_t lsamp = CLK_ADDRESS_CLAMP_TO_EDGE |
+                        CLK_FILTER_LINEAR;
+const sampler_t nsamp = CLK_ADDRESS_CLAMP_TO_EDGE |
+                        CLK_FILTER_NEAREST;
+
+__kernel void drawImage
+    (__write_only image2d_t dstImage,
+     __read_only image2d_t dst2Image,
+     __read_only image2d_t srcImage,
+     int dstx, int dsty, int dstw, int dsth,
+     float4 src, float opacity)
+{
+    int2 dstPos = (int2)(get_global_id(0) + dstx,
+                         get_global_id(1) + dsty);
+    float2 srcPos = (float2)(get_global_id(0) * src.z / dstw + src.x,
+                             get_global_id(1) * src.w / dsth + src.y);
+    if (dstPos.x < dstx || dstPos.x >= (dstx + dstw) ||
+            dstPos.y < dsty || dstPos.y >= (dsty + dsth))
+        return;     // Undrawn extra pixel due to 8x8 round up.
+    float4 scolor = read_imagef(srcImage, lsamp, srcPos);
+    float4 dcolor = read_imagef(dst2Image, nsamp, dstPos);
+    // Destination is assumed to be RGB, source may be RGBA.
+    dcolor = (float4)(dcolor.xyz * (1.0f - scolor.w * opacity) + scolor.xyz * scolor.w * opacity, 1.0f);
+    write_imagef(dstImage, dstPos, clamp(dcolor, 0.0f, 1.0f));
+}
diff --git a/examples/opencl/imagedrawing/imagedrawing.pro b/examples/opencl/imagedrawing/imagedrawing.pro
new file mode 100644
index 0000000..7b38e19
--- /dev/null
+++ b/examples/opencl/imagedrawing/imagedrawing.pro
@@ -0,0 +1,13 @@
+TEMPLATE = app
+TARGET = imagedrawing
+DEPENDPATH += .
+INCLUDEPATH += .
+
+# Input
+SOURCES += main.cpp \
+           imagewidget.cpp
+HEADERS += imagewidget.h
+RESOURCES += imagedrawing.qrc
+
+LIBS += -L../../../lib -L../../../bin
+include(../../../src/opencl/opencl_dep.pri)
diff --git a/examples/opencl/imagedrawing/imagedrawing.qrc b/examples/opencl/imagedrawing/imagedrawing.qrc
new file mode 100644
index 0000000..7ebade6
--- /dev/null
+++ b/examples/opencl/imagedrawing/imagedrawing.qrc
@@ -0,0 +1,9 @@
+<!DOCTYPE RCC><RCC version="1.0">
+<qresource>
+    <file>imagedrawing.cl</file>
+    <file>beavis.jpg</file>
+    <file>bg1.jpg</file>
+    <file>flower.jpg</file>
+    <file>qtlogo.png</file>
+</qresource>
+</RCC>
diff --git a/examples/opencl/imagedrawing/imagewidget.cpp b/examples/opencl/imagedrawing/imagewidget.cpp
new file mode 100644
index 0000000..27b4344
--- /dev/null
+++ b/examples/opencl/imagedrawing/imagewidget.cpp
@@ -0,0 +1,172 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt3D 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "imagewidget.h"
+#include <QtGui/qpainter.h>
+#include <QtGui/qvector4d.h>
+
+ImageWidget::ImageWidget(QWidget *parent)
+    : QWidget(parent)
+{
+    setAttribute(Qt::WA_OpaquePaintEvent);
+
+    if (!context.create())
+        qFatal("Could not create OpenCL context");
+
+    program = context.buildProgramFromSourceFile(QLatin1String(":/imagedrawing.cl"));
+
+    fillRectWithColor = program.createKernel("fillRectWithColor");
+    fillRectWithColor.setLocalWorkSize(8, 8);
+
+    drawImageKernel = program.createKernel("drawImage");
+    drawImageKernel.setLocalWorkSize(8, 8);
+
+    flower = context.createImage2DCopy
+        (QImage(QLatin1String(":/flower.jpg")), QCL::ReadOnly);
+    bg1 = context.createImage2DCopy
+        (QImage(QLatin1String(":/bg1.jpg")), QCL::ReadOnly);
+    beavis = context.createImage2DCopy
+        (QImage(QLatin1String(":/beavis.jpg")), QCL::ReadOnly);
+    qtlogo = context.createImage2DCopy
+        (QImage(QLatin1String(":/qtlogo.png")), QCL::ReadOnly);
+}
+
+ImageWidget::~ImageWidget()
+{
+}
+
+void ImageWidget::paintEvent(QPaintEvent *)
+{
+    // Create a QCLImage2D object for the window surface.
+    QSize wsize = size();
+    if (wsize != windowSize)
+        surfaceImage = QCLImage2D();
+    if (surfaceImage.isNull()) {
+        windowSize = wsize;
+        surfaceImage = context.createImage2DDevice
+            (QImage::Format_RGB32, windowSize, QCL::ReadWrite);
+    }
+
+    // Clear to the background color.
+    QColor bgcolor = palette().color(backgroundRole());
+    fillRect(0, 0, wsize.width(), wsize.height(), bgcolor);
+
+    // Draw the images.
+    drawImage(flower, 50, 50, 1.0f);
+    drawImage(beavis, 200, 100, 0.9f);
+    drawScaledImage(beavis, 550, 150, 250, 250, 0.9f);
+    drawImage(bg1, 0, 0, 0.7f);
+    drawImage(qtlogo, 200, 350, 1.0f);
+
+    // Draw the window surface image to the actual window.
+    QPainter painter(this);
+    surfaceImage.drawImage(&painter, QPoint(0, 0));
+}
+
+void ImageWidget::fillRect(int x, int y, int width, int height,
+                          const QColor& color)
+{
+    // Round up the global work size so we can process the
+    // rectangle in 8x8 local work size units.  The kernel will
+    // ignore pixels that are outside the rectangle limits.
+    fillRectWithColor.setGlobalWorkSize((width + 7) & ~7, (height + 7) & ~7);
+    fillRectWithColor(surfaceImage, x, y, x + width, y + height, color);
+}
+
+void ImageWidget::drawImage(const QCLImage2D& image, int x, int y, float opacity)
+{
+    QRect srcRect = QRect(0, 0, image.width(), image.height());
+    QRect dstRect = QRect(x, y, srcRect.width(), srcRect.height());
+
+    // Clamp the draw to the surface extents.
+    QRect dstRect2 = dstRect.intersect
+        (QRect(0, 0, windowSize.width(), windowSize.height()));
+    srcRect.setLeft(srcRect.left() + dstRect2.left() - dstRect.left());
+    srcRect.setTop(srcRect.top() + dstRect2.top() - dstRect.top());
+    srcRect.setRight(srcRect.right() + dstRect2.right() - dstRect.right());
+    srcRect.setBottom(srcRect.bottom() + dstRect2.bottom() - dstRect.bottom());
+    dstRect = dstRect2;
+    if (srcRect.isEmpty() || dstRect.isEmpty())
+        return;
+
+    // Set the global work size to the destination size rounded up to 8.
+    drawImageKernel.setGlobalWorkSize
+        ((dstRect.width() + 7) & ~7, (dstRect.height() + 7) & ~7);
+
+    // Draw the image.
+    QVector4D src(srcRect.x(), srcRect.y(), srcRect.width(), srcRect.height());
+    drawImageKernel
+        (surfaceImage, surfaceImage, image,
+         dstRect.x(), dstRect.y(), dstRect.width(), dstRect.height(),
+         src, opacity);
+}
+
+void ImageWidget::drawScaledImage
+    (const QCLImage2D& image, int x, int y, int width, int height,
+     float opacity)
+{
+    QRectF srcRect = QRectF(0, 0, image.width(), image.height());
+    QRect dstRect = QRect(x, y, width, height);
+
+    // Clamp the draw to the surface extents.
+    QRect dstRect2 = dstRect.intersect
+        (QRect(0, 0, windowSize.width(), windowSize.height()));
+    qreal scaleX = srcRect.width() / width;
+    qreal scaleY = srcRect.height() / height;
+    srcRect.setLeft(srcRect.left() + (dstRect2.left() - dstRect.left()) * scaleX);
+    srcRect.setTop(srcRect.top() + (dstRect2.top() - dstRect.top()) * scaleY);
+    srcRect.setRight(srcRect.right() + (dstRect2.right() - dstRect.right()) * scaleX);
+    srcRect.setBottom(srcRect.bottom() + (dstRect2.bottom() - dstRect.bottom()) * scaleY);
+    dstRect = dstRect2;
+    if (srcRect.isEmpty() || dstRect.isEmpty())
+        return;
+
+    // Set the global work size to the destination size rounded up to 8.
+    drawImageKernel.setGlobalWorkSize
+        ((dstRect.width() + 7) & ~7, (dstRect.height() + 7) & ~7);
+
+    // Draw the image.
+    QVector4D src(srcRect.x(), srcRect.y(), srcRect.width(), srcRect.height());
+    drawImageKernel
+        (surfaceImage, surfaceImage, image,
+         dstRect.x(), dstRect.y(), dstRect.width(), dstRect.height(),
+         src, opacity);
+}
diff --git a/examples/opencl/imagedrawing/imagewidget.h b/examples/opencl/imagedrawing/imagewidget.h
new file mode 100644
index 0000000..65e355c
--- /dev/null
+++ b/examples/opencl/imagedrawing/imagewidget.h
@@ -0,0 +1,81 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt3D 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef PATHWIDGET_H
+#define PATHWIDGET_H
+
+#include <QWidget>
+#include <QImage>
+#include "qclcontext.h"
+
+class ImageWidget : public QWidget
+{
+    Q_OBJECT
+public:
+    ImageWidget(QWidget *parent = 0);
+    ~ImageWidget();
+
+protected:
+    void paintEvent(QPaintEvent *);
+
+private:
+    QCLContext context;
+
+    QCLProgram program;
+    QCLKernel fillRectWithColor;
+    QCLKernel drawImageKernel;
+
+    QCLImage2D flower;
+    QCLImage2D bg1;
+    QCLImage2D beavis;
+    QCLImage2D qtlogo;
+
+    QSize windowSize;
+    QCLImage2D surfaceImage;
+
+    void fillRect(int x, int y, int width, int height, const QColor& color);
+    void drawImage(const QCLImage2D& image, int x, int y, float opacity);
+    void drawScaledImage
+        (const QCLImage2D& image, int x, int y, int width, int height,
+         float opacity);
+};
+
+#endif
diff --git a/examples/opencl/imagedrawing/main.cpp b/examples/opencl/imagedrawing/main.cpp
new file mode 100644
index 0000000..1843255
--- /dev/null
+++ b/examples/opencl/imagedrawing/main.cpp
@@ -0,0 +1,51 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt3D 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QApplication>
+#include "imagewidget.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    ImageWidget w;
+    w.show();
+    return app.exec();
+}
diff --git a/examples/opencl/imagedrawing/qtlogo.png b/examples/opencl/imagedrawing/qtlogo.png
new file mode 100644
index 0000000..153cb3f
--- /dev/null
+++ b/examples/opencl/imagedrawing/qtlogo.png
diff --git a/examples/opencl/opencl.pro b/examples/opencl/opencl.pro
index 558760f..401ef40 100644
--- a/examples/opencl/opencl.pro
+++ b/examples/opencl/opencl.pro
@@ -1,2 +1,2 @@
 TEMPLATE = subdirs
-SUBDIRS = vectoradd blur pathdrawing bezierpatch
+SUBDIRS = vectoradd blur pathdrawing bezierpatch imagedrawing