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Diffstat (limited to 'examples/svg/embedded/fluidlauncher/pictureflow.cpp')
| -rw-r--r-- | examples/svg/embedded/fluidlauncher/pictureflow.cpp | 1396 |
1 files changed, 1396 insertions, 0 deletions
diff --git a/examples/svg/embedded/fluidlauncher/pictureflow.cpp b/examples/svg/embedded/fluidlauncher/pictureflow.cpp new file mode 100644 index 0000000..d0dfe87 --- /dev/null +++ b/examples/svg/embedded/fluidlauncher/pictureflow.cpp @@ -0,0 +1,1396 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the ActiveQt framework of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names +** of its contributors may be used to endorse or promote products derived +** from this software without specific prior written permission. +** +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +/* + ORIGINAL COPYRIGHT HEADER + PictureFlow - animated image show widget + http://pictureflow.googlecode.com + + Copyright (C) 2007 Ariya Hidayat (ariya@kde.org) + + Permission is hereby granted, free of charge, to any person obtaining a copy + of this software and associated documentation files (the "Software"), to deal + in the Software without restriction, including without limitation the rights + to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + copies of the Software, and to permit persons to whom the Software is + furnished to do so, subject to the following conditions: + + The above copyright notice and this permission notice shall be included in + all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + THE SOFTWARE. +*/ + +#include "pictureflow.h" + +#include <QBasicTimer> +#include <QCache> +#include <QImage> +#include <QKeyEvent> +#include <QPainter> +#include <QPixmap> +#include <QTimer> +#include <QVector> +#include <QWidget> +#include <QTime> + +#include <QDebug> + +static const int captionFontSize = +#ifdef Q_WS_S60 + 8; +#else + 14; +#endif + + +// uncomment this to enable bilinear filtering for texture mapping +// gives much better rendering, at the cost of memory space +// #define PICTUREFLOW_BILINEAR_FILTER + +// for fixed-point arithmetic, we need minimum 32-bit long +// long long (64-bit) might be useful for multiplication and division +typedef long PFreal; + +typedef unsigned short QRgb565; + +#define RGB565_RED_MASK 0xF800 +#define RGB565_GREEN_MASK 0x07E0 +#define RGB565_BLUE_MASK 0x001F + +#define RGB565_RED(col) ((col&RGB565_RED_MASK)>>11) +#define RGB565_GREEN(col) ((col&RGB565_GREEN_MASK)>>5) +#define RGB565_BLUE(col) (col&RGB565_BLUE_MASK) + +#define PFREAL_SHIFT 10 +#define PFREAL_FACTOR (1 << PFREAL_SHIFT) +#define PFREAL_ONE (1 << PFREAL_SHIFT) +#define PFREAL_HALF (PFREAL_ONE >> 1) + +inline PFreal fmul(PFreal a, PFreal b) +{ + return ((long long)(a))*((long long)(b)) >> PFREAL_SHIFT; +} + +inline PFreal fdiv(PFreal num, PFreal den) +{ + long long p = (long long)(num) << (PFREAL_SHIFT*2); + long long q = p / (long long)den; + long long r = q >> PFREAL_SHIFT; + + return r; +} + +inline float fixedToFloat(PFreal val) +{ + return ((float)val) / (float)PFREAL_ONE; +} + +inline PFreal floatToFixed(float val) +{ + return (PFreal)(val*PFREAL_ONE); +} + +#define IANGLE_MAX 1024 +#define IANGLE_MASK 1023 + +// warning: regenerate the table if IANGLE_MAX and PFREAL_SHIFT are changed! +static const PFreal sinTable[IANGLE_MAX] = { + 3, 9, 15, 21, 28, 34, 40, 47, + 53, 59, 65, 72, 78, 84, 90, 97, + 103, 109, 115, 122, 128, 134, 140, 147, + 153, 159, 165, 171, 178, 184, 190, 196, + 202, 209, 215, 221, 227, 233, 239, 245, + 251, 257, 264, 270, 276, 282, 288, 294, + 300, 306, 312, 318, 324, 330, 336, 342, + 347, 353, 359, 365, 371, 377, 383, 388, + 394, 400, 406, 412, 417, 423, 429, 434, + 440, 446, 451, 457, 463, 468, 474, 479, + 485, 491, 496, 501, 507, 512, 518, 523, + 529, 534, 539, 545, 550, 555, 561, 566, + 571, 576, 581, 587, 592, 597, 602, 607, + 612, 617, 622, 627, 632, 637, 642, 647, + 652, 656, 661, 666, 671, 675, 680, 685, + 690, 694, 699, 703, 708, 712, 717, 721, + 726, 730, 735, 739, 743, 748, 752, 756, + 760, 765, 769, 773, 777, 781, 785, 789, + 793, 797, 801, 805, 809, 813, 816, 820, + 824, 828, 831, 835, 839, 842, 846, 849, + 853, 856, 860, 863, 866, 870, 873, 876, + 879, 883, 886, 889, 892, 895, 898, 901, + 904, 907, 910, 913, 916, 918, 921, 924, + 927, 929, 932, 934, 937, 939, 942, 944, + 947, 949, 951, 954, 956, 958, 960, 963, + 965, 967, 969, 971, 973, 975, 977, 978, + 980, 982, 984, 986, 987, 989, 990, 992, + 994, 995, 997, 998, 999, 1001, 1002, 1003, + 1004, 1006, 1007, 1008, 1009, 1010, 1011, 1012, + 1013, 1014, 1015, 1015, 1016, 1017, 1018, 1018, + 1019, 1019, 1020, 1020, 1021, 1021, 1022, 1022, + 1022, 1023, 1023, 1023, 1023, 1023, 1023, 1023, + 1023, 1023, 1023, 1023, 1023, 1023, 1023, 1022, + 1022, 1022, 1021, 1021, 1020, 1020, 1019, 1019, + 1018, 1018, 1017, 1016, 1015, 1015, 1014, 1013, + 1012, 1011, 1010, 1009, 1008, 1007, 1006, 1004, + 1003, 1002, 1001, 999, 998, 997, 995, 994, + 992, 990, 989, 987, 986, 984, 982, 980, + 978, 977, 975, 973, 971, 969, 967, 965, + 963, 960, 958, 956, 954, 951, 949, 947, + 944, 942, 939, 937, 934, 932, 929, 927, + 924, 921, 918, 916, 913, 910, 907, 904, + 901, 898, 895, 892, 889, 886, 883, 879, + 876, 873, 870, 866, 863, 860, 856, 853, + 849, 846, 842, 839, 835, 831, 828, 824, + 820, 816, 813, 809, 805, 801, 797, 793, + 789, 785, 781, 777, 773, 769, 765, 760, + 756, 752, 748, 743, 739, 735, 730, 726, + 721, 717, 712, 708, 703, 699, 694, 690, + 685, 680, 675, 671, 666, 661, 656, 652, + 647, 642, 637, 632, 627, 622, 617, 612, + 607, 602, 597, 592, 587, 581, 576, 571, + 566, 561, 555, 550, 545, 539, 534, 529, + 523, 518, 512, 507, 501, 496, 491, 485, + 479, 474, 468, 463, 457, 451, 446, 440, + 434, 429, 423, 417, 412, 406, 400, 394, + 388, 383, 377, 371, 365, 359, 353, 347, + 342, 336, 330, 324, 318, 312, 306, 300, + 294, 288, 282, 276, 270, 264, 257, 251, + 245, 239, 233, 227, 221, 215, 209, 202, + 196, 190, 184, 178, 171, 165, 159, 153, + 147, 140, 134, 128, 122, 115, 109, 103, + 97, 90, 84, 78, 72, 65, 59, 53, + 47, 40, 34, 28, 21, 15, 9, 3, + -4, -10, -16, -22, -29, -35, -41, -48, + -54, -60, -66, -73, -79, -85, -91, -98, + -104, -110, -116, -123, -129, -135, -141, -148, + -154, -160, -166, -172, -179, -185, -191, -197, + -203, -210, -216, -222, -228, -234, -240, -246, + -252, -258, -265, -271, -277, -283, -289, -295, + -301, -307, -313, -319, -325, -331, -337, -343, + -348, -354, -360, -366, -372, -378, -384, -389, + -395, -401, -407, -413, -418, -424, -430, -435, + -441, -447, -452, -458, -464, -469, -475, -480, + -486, -492, -497, -502, -508, -513, -519, -524, + -530, -535, -540, -546, -551, -556, -562, -567, + -572, -577, -582, -588, -593, -598, -603, -608, + -613, -618, -623, -628, -633, -638, -643, -648, + -653, -657, -662, -667, -672, -676, -681, -686, + -691, -695, -700, -704, -709, -713, -718, -722, + -727, -731, -736, -740, -744, -749, -753, -757, + -761, -766, -770, -774, -778, -782, -786, -790, + -794, -798, -802, -806, -810, -814, -817, -821, + -825, -829, -832, -836, -840, -843, -847, -850, + -854, -857, -861, -864, -867, -871, -874, -877, + -880, -884, -887, -890, -893, -896, -899, -902, + -905, -908, -911, -914, -917, -919, -922, -925, + -928, -930, -933, -935, -938, -940, -943, -945, + -948, -950, -952, -955, -957, -959, -961, -964, + -966, -968, -970, -972, -974, -976, -978, -979, + -981, -983, -985, -987, -988, -990, -991, -993, + -995, -996, -998, -999, -1000, -1002, -1003, -1004, + -1005, -1007, -1008, -1009, -1010, -1011, -1012, -1013, + -1014, -1015, -1016, -1016, -1017, -1018, -1019, -1019, + -1020, -1020, -1021, -1021, -1022, -1022, -1023, -1023, + -1023, -1024, -1024, -1024, -1024, -1024, -1024, -1024, + -1024, -1024, -1024, -1024, -1024, -1024, -1024, -1023, + -1023, -1023, -1022, -1022, -1021, -1021, -1020, -1020, + -1019, -1019, -1018, -1017, -1016, -1016, -1015, -1014, + -1013, -1012, -1011, -1010, -1009, -1008, -1007, -1005, + -1004, -1003, -1002, -1000, -999, -998, -996, -995, + -993, -991, -990, -988, -987, -985, -983, -981, + -979, -978, -976, -974, -972, -970, -968, -966, + -964, -961, -959, -957, -955, -952, -950, -948, + -945, -943, -940, -938, -935, -933, -930, -928, + -925, -922, -919, -917, -914, -911, -908, -905, + -902, -899, -896, -893, -890, -887, -884, -880, + -877, -874, -871, -867, -864, -861, -857, -854, + -850, -847, -843, -840, -836, -832, -829, -825, + -821, -817, -814, -810, -806, -802, -798, -794, + -790, -786, -782, -778, -774, -770, -766, -761, + -757, -753, -749, -744, -740, -736, -731, -727, + -722, -718, -713, -709, -704, -700, -695, -691, + -686, -681, -676, -672, -667, -662, -657, -653, + -648, -643, -638, -633, -628, -623, -618, -613, + -608, -603, -598, -593, -588, -582, -577, -572, + -567, -562, -556, -551, -546, -540, -535, -530, + -524, -519, -513, -508, -502, -497, -492, -486, + -480, -475, -469, -464, -458, -452, -447, -441, + -435, -430, -424, -418, -413, -407, -401, -395, + -389, -384, -378, -372, -366, -360, -354, -348, + -343, -337, -331, -325, -319, -313, -307, -301, + -295, -289, -283, -277, -271, -265, -258, -252, + -246, -240, -234, -228, -222, -216, -210, -203, + -197, -191, -185, -179, -172, -166, -160, -154, + -148, -141, -135, -129, -123, -116, -110, -104, + -98, -91, -85, -79, -73, -66, -60, -54, + -48, -41, -35, -29, -22, -16, -10, -4 +}; + +// this is the program the generate the above table +#if 0 +#include <stdio.h> +#include <math.h> + +#ifndef M_PI +#define M_PI 3.14159265358979323846 +#endif + +#define PFREAL_ONE 1024 +#define IANGLE_MAX 1024 + +int main(int, char**) +{ + FILE*f = fopen("table.c","wt"); + fprintf(f,"PFreal sinTable[] = {\n"); + for(int i = 0; i < 128; i++) + { + for(int j = 0; j < 8; j++) + { + int iang = j+i*8; + double ii = (double)iang + 0.5; + double angle = ii * 2 * M_PI / IANGLE_MAX; + double sinAngle = sin(angle); + fprintf(f,"%6d, ", (int)(floor(PFREAL_ONE*sinAngle))); + } + fprintf(f,"\n"); + } + fprintf(f,"};\n"); + fclose(f); + + return 0; +} +#endif + +inline PFreal fsin(int iangle) +{ + while(iangle < 0) + iangle += IANGLE_MAX; + return sinTable[iangle & IANGLE_MASK]; +} + +inline PFreal fcos(int iangle) +{ + // quarter phase shift + return fsin(iangle + (IANGLE_MAX >> 2)); +} + +struct SlideInfo +{ + int slideIndex; + int angle; + PFreal cx; + PFreal cy; +}; + +class PictureFlowPrivate +{ +public: + PictureFlowPrivate(PictureFlow* widget); + + int slideCount() const; + void setSlideCount(int count); + + QSize slideSize() const; + void setSlideSize(QSize size); + + int zoomFactor() const; + void setZoomFactor(int z); + + QImage slide(int index) const; + void setSlide(int index, const QImage& image); + + int currentSlide() const; + void setCurrentSlide(int index); + + int getTarget() const; + + void showPrevious(); + void showNext(); + void showSlide(int index); + + void resize(int w, int h); + + void render(); + void startAnimation(); + void updateAnimation(); + + void clearSurfaceCache(); + + QImage buffer; + QBasicTimer animateTimer; + + bool singlePress; + int singlePressThreshold; + QPoint firstPress; + QPoint previousPos; + QTime previousPosTimestamp; + int pixelDistanceMoved; + int pixelsToMovePerSlide; + + QVector<QString> captions; + +private: + PictureFlow* widget; + + int slideWidth; + int slideHeight; + int zoom; + + QVector<QImage> slideImages; + int centerIndex; + SlideInfo centerSlide; + QVector<SlideInfo> leftSlides; + QVector<SlideInfo> rightSlides; + + QVector<PFreal> rays; + int itilt; + int spacing; + PFreal offsetX; + PFreal offsetY; + + QImage blankSurface; + QCache<int, QImage> surfaceCache; + QTimer triggerTimer; + + int slideFrame; + int step; + int target; + int fade; + + void recalc(int w, int h); + QRect renderSlide(const SlideInfo &slide, int alpha=256, int col1=-1, int col=-1); + QImage* surface(int slideIndex); + void triggerRender(); + void resetSlides(); +}; + +PictureFlowPrivate::PictureFlowPrivate(PictureFlow* w) +{ + widget = w; + + slideWidth = 200; + slideHeight = 200; + zoom = 100; + + centerIndex = 0; + + slideFrame = 0; + step = 0; + target = 0; + fade = 256; + + triggerTimer.setSingleShot(true); + triggerTimer.setInterval(0); + QObject::connect(&triggerTimer, SIGNAL(timeout()), widget, SLOT(render())); + + recalc(200, 200); + resetSlides(); +} + +int PictureFlowPrivate::slideCount() const +{ + return slideImages.count(); +} + +void PictureFlowPrivate::setSlideCount(int count) +{ + slideImages.resize(count); + captions.resize(count); + surfaceCache.clear(); + resetSlides(); + triggerRender(); +} + +QSize PictureFlowPrivate::slideSize() const +{ + return QSize(slideWidth, slideHeight); +} + +void PictureFlowPrivate::setSlideSize(QSize size) +{ + slideWidth = size.width(); + slideHeight = size.height(); + recalc(buffer.width(), buffer.height()); + triggerRender(); +} + +int PictureFlowPrivate::zoomFactor() const +{ + return zoom; +} + +void PictureFlowPrivate::setZoomFactor(int z) +{ + if(z <= 0) + return; + + zoom = z; + recalc(buffer.width(), buffer.height()); + triggerRender(); +} + +QImage PictureFlowPrivate::slide(int index) const +{ + return slideImages[index]; +} + +void PictureFlowPrivate::setSlide(int index, const QImage& image) +{ + if((index >= 0) && (index < slideImages.count())) + { + slideImages[index] = image; + surfaceCache.remove(index); + triggerRender(); + } +} + +int PictureFlowPrivate::getTarget() const +{ + return target; +} + +int PictureFlowPrivate::currentSlide() const +{ + return centerIndex; +} + +void PictureFlowPrivate::setCurrentSlide(int index) +{ + step = 0; + centerIndex = qBound(index, 0, slideImages.count()-1); + target = centerIndex; + slideFrame = index << 16; + resetSlides(); + triggerRender(); +} + +void PictureFlowPrivate::showPrevious() +{ + if(step >= 0) + { + if(centerIndex > 0) + { + target--; + startAnimation(); + } + } + else + { + target = qMax(0, centerIndex - 2); + } +} + +void PictureFlowPrivate::showNext() +{ + if(step <= 0) + { + if(centerIndex < slideImages.count()-1) + { + target++; + startAnimation(); + } + } + else + { + target = qMin(centerIndex + 2, slideImages.count()-1); + } +} + +void PictureFlowPrivate::showSlide(int index) +{ + index = qMax(index, 0); + index = qMin(slideImages.count()-1, index); + if(index == centerSlide.slideIndex) + return; + + target = index; + startAnimation(); +} + +void PictureFlowPrivate::resize(int w, int h) +{ + recalc(w, h); + resetSlides(); + triggerRender(); +} + + +// adjust slides so that they are in "steady state" position +void PictureFlowPrivate::resetSlides() +{ + centerSlide.angle = 0; + centerSlide.cx = 0; + centerSlide.cy = 0; + centerSlide.slideIndex = centerIndex; + + leftSlides.clear(); + leftSlides.resize(3); + for(int i = 0; i < leftSlides.count(); i++) + { + SlideInfo& si = leftSlides[i]; + si.angle = itilt; + si.cx = -(offsetX + spacing*i*PFREAL_ONE); + si.cy = offsetY; + si.slideIndex = centerIndex-1-i; + //qDebug() << "Left[" << i << "] x=" << fixedToFloat(si.cx) << ", y=" << fixedToFloat(si.cy) ; + } + + rightSlides.clear(); + rightSlides.resize(3); + for(int i = 0; i < rightSlides.count(); i++) + { + SlideInfo& si = rightSlides[i]; + si.angle = -itilt; + si.cx = offsetX + spacing*i*PFREAL_ONE; + si.cy = offsetY; + si.slideIndex = centerIndex+1+i; + //qDebug() << "Right[" << i << "] x=" << fixedToFloat(si.cx) << ", y=" << fixedToFloat(si.cy) ; + } +} + +#define BILINEAR_STRETCH_HOR 4 +#define BILINEAR_STRETCH_VER 4 + +static QImage prepareSurface(QImage img, int w, int h) +{ + Qt::TransformationMode mode = Qt::SmoothTransformation; + img = img.scaled(w, h, Qt::IgnoreAspectRatio, mode); + + // slightly larger, to accommodate for the reflection + int hs = h * 2; + int hofs = h / 3; + + // offscreen buffer: black is sweet + QImage result(hs, w, QImage::Format_RGB16); + result.fill(0); + + // transpose the image, this is to speed-up the rendering + // because we process one column at a time + // (and much better and faster to work row-wise, i.e in one scanline) + for(int x = 0; x < w; x++) + for(int y = 0; y < h; y++) + result.setPixel(hofs + y, x, img.pixel(x, y)); + + // create the reflection + int ht = hs - h - hofs; + int hte = ht; + for(int x = 0; x < w; x++) + for(int y = 0; y < ht; y++) + { + QRgb color = img.pixel(x, img.height()-y-1); + //QRgb565 color = img.scanLine(img.height()-y-1) + x*sizeof(QRgb565); //img.pixel(x, img.height()-y-1); + int a = qAlpha(color); + int r = qRed(color) * a / 256 * (hte - y) / hte * 3/5; + int g = qGreen(color) * a / 256 * (hte - y) / hte * 3/5; + int b = qBlue(color) * a / 256 * (hte - y) / hte * 3/5; + result.setPixel(h+hofs+y, x, qRgb(r, g, b)); + } + +#ifdef PICTUREFLOW_BILINEAR_FILTER + int hh = BILINEAR_STRETCH_VER*hs; + int ww = BILINEAR_STRETCH_HOR*w; + result = result.scaled(hh, ww, Qt::IgnoreAspectRatio, Qt::SmoothTransformation); +#endif + + return result; +} + + +// get transformed image for specified slide +// if it does not exist, create it and place it in the cache +QImage* PictureFlowPrivate::surface(int slideIndex) +{ + if(slideIndex < 0) + return 0; + if(slideIndex >= slideImages.count()) + return 0; + + if(surfaceCache.contains(slideIndex)) + return surfaceCache[slideIndex]; + + QImage img = widget->slide(slideIndex); + if(img.isNull()) + { + if(blankSurface.isNull()) + { + blankSurface = QImage(slideWidth, slideHeight, QImage::Format_RGB16); + + QPainter painter(&blankSurface); + QPoint p1(slideWidth*4/10, 0); + QPoint p2(slideWidth*6/10, slideHeight); + QLinearGradient linearGrad(p1, p2); + linearGrad.setColorAt(0, Qt::black); + linearGrad.setColorAt(1, Qt::white); + painter.setBrush(linearGrad); + painter.fillRect(0, 0, slideWidth, slideHeight, QBrush(linearGrad)); + + painter.setPen(QPen(QColor(64,64,64), 4)); + painter.setBrush(QBrush()); + painter.drawRect(2, 2, slideWidth-3, slideHeight-3); + painter.end(); + blankSurface = prepareSurface(blankSurface, slideWidth, slideHeight); + } + return &blankSurface; + } + + surfaceCache.insert(slideIndex, new QImage(prepareSurface(img, slideWidth, slideHeight))); + return surfaceCache[slideIndex]; +} + + +// Schedules rendering the slides. Call this function to avoid immediate +// render and thus cause less flicker. +void PictureFlowPrivate::triggerRender() +{ + triggerTimer.start(); +} + +// Render the slides. Updates only the offscreen buffer. +void PictureFlowPrivate::render() +{ + buffer.fill(0); + + int nleft = leftSlides.count(); + int nright = rightSlides.count(); + + QRect r = renderSlide(centerSlide); + int c1 = r.left(); + int c2 = r.right(); + + if(step == 0) + { + // no animation, boring plain rendering + for(int index = 0; index < nleft-1; index++) + { + int alpha = (index < nleft-2) ? 256 : 128; + QRect rs = renderSlide(leftSlides[index], alpha, 0, c1-1); + if(!rs.isEmpty()) + c1 = rs.left(); + } + for(int index = 0; index < nright-1; index++) + { + int alpha = (index < nright-2) ? 256 : 128; + QRect rs = renderSlide(rightSlides[index], alpha, c2+1, buffer.width()); + if(!rs.isEmpty()) + c2 = rs.right(); + } + + QPainter painter; + painter.begin(&buffer); + + QFont font("Arial", captionFontSize); + font.setBold(true); + painter.setFont(font); + painter.setPen(Qt::white); + //painter.setPen(QColor(255,255,255,127)); + + if (!captions.isEmpty()) + painter.drawText( QRect(0,0, buffer.width(), (buffer.height() - slideSize().height())/4), + Qt::AlignCenter, captions[centerIndex]); + + painter.end(); + + } + else + { + // the first and last slide must fade in/fade out + for(int index = 0; index < nleft; index++) + { + int alpha = 256; + if(index == nleft-1) + alpha = (step > 0) ? 0 : 128-fade/2; + if(index == nleft-2) + alpha = (step > 0) ? 128-fade/2 : 256-fade/2; + if(index == nleft-3) + alpha = (step > 0) ? 256-fade/2 : 256; + QRect rs = renderSlide(leftSlides[index], alpha, 0, c1-1); + if(!rs.isEmpty()) + c1 = rs.left(); + + alpha = (step > 0) ? 256-fade/2 : 256; + } + for(int index = 0; index < nright; index++) + { + int alpha = (index < nright-2) ? 256 : 128; + if(index == nright-1) + alpha = (step > 0) ? fade/2 : 0; + if(index == nright-2) + alpha = (step > 0) ? 128+fade/2 : fade/2; + if(index == nright-3) + alpha = (step > 0) ? 256 : 128+fade/2; + QRect rs = renderSlide(rightSlides[index], alpha, c2+1, buffer.width()); + if(!rs.isEmpty()) + c2 = rs.right(); + } + + QPainter painter; + painter.begin(&buffer); + + QFont font("Arial", captionFontSize); + font.setBold(true); + painter.setFont(font); + + int leftTextIndex = (step>0) ? centerIndex : centerIndex-1; + + painter.setPen(QColor(255,255,255, (255-fade) )); + painter.drawText( QRect(0,0, buffer.width(), (buffer.height() - slideSize().height())/4), + Qt::AlignCenter, captions[leftTextIndex]); + + painter.setPen(QColor(255,255,255, fade)); + painter.drawText( QRect(0,0, buffer.width(), (buffer.height() - slideSize().height())/4), + Qt::AlignCenter, captions[leftTextIndex+1]); + + painter.end(); + } +} + + +static inline uint BYTE_MUL_RGB16(uint x, uint a) { + a += 1; + uint t = (((x & 0x07e0)*a) >> 8) & 0x07e0; + t |= (((x & 0xf81f)*(a>>2)) >> 6) & 0xf81f; + return t; +} + +static inline uint BYTE_MUL_RGB16_32(uint x, uint a) { + uint t = (((x & 0xf81f07e0) >> 5)*a) & 0xf81f07e0; + t |= (((x & 0x07e0f81f)*a) >> 5) & 0x07e0f81f; + return t; +} + + +// Renders a slide to offscreen buffer. Returns a rect of the rendered area. +// alpha=256 means normal, alpha=0 is fully black, alpha=128 half transparent +// col1 and col2 limit the column for rendering. +QRect PictureFlowPrivate::renderSlide(const SlideInfo &slide, int alpha, +int col1, int col2) +{ + QImage* src = surface(slide.slideIndex); + if(!src) + return QRect(); + + QRect rect(0, 0, 0, 0); + +#ifdef PICTUREFLOW_BILINEAR_FILTER + int sw = src->height() / BILINEAR_STRETCH_HOR; + int sh = src->width() / BILINEAR_STRETCH_VER; +#else + int sw = src->height(); + int sh = src->width(); +#endif + int h = buffer.height(); + int w = buffer.width(); + + if(col1 > col2) + { + int c = col2; + col2 = col1; + col1 = c; + } + + col1 = (col1 >= 0) ? col1 : 0; + col2 = (col2 >= 0) ? col2 : w-1; + col1 = qMin(col1, w-1); + col2 = qMin(col2, w-1); + + int distance = h * 100 / zoom; + PFreal sdx = fcos(slide.angle); + PFreal sdy = fsin(slide.angle); + PFreal xs = slide.cx - slideWidth * sdx/2; + PFreal ys = slide.cy - slideWidth * sdy/2; + PFreal dist = distance * PFREAL_ONE; + + int xi = qMax((PFreal)0, ((w*PFREAL_ONE/2) + fdiv(xs*h, dist+ys)) >> PFREAL_SHIFT); + if(xi >= w) + return rect; + + bool flag = false; + rect.setLeft(xi); + for(int x = qMax(xi, col1); x <= col2; x++) + { + PFreal hity = 0; + PFreal fk = rays[x]; + if(sdy) + { + fk = fk - fdiv(sdx,sdy); + hity = -fdiv((rays[x]*distance - slide.cx + slide.cy*sdx/sdy), fk); + } + + dist = distance*PFREAL_ONE + hity; + if(dist < 0) + continue; + + PFreal hitx = fmul(dist, rays[x]); + PFreal hitdist = fdiv(hitx - slide.cx, sdx); + +#ifdef PICTUREFLOW_BILINEAR_FILTER + int column = sw*BILINEAR_STRETCH_HOR/2 + (hitdist*BILINEAR_STRETCH_HOR >> PFREAL_SHIFT); + if(column >= sw*BILINEAR_STRETCH_HOR) + break; +#else + int column = sw/2 + (hitdist >> PFREAL_SHIFT); + if(column >= sw) + break; +#endif + if(column < 0) + continue; + + rect.setRight(x); + if(!flag) + rect.setLeft(x); + flag = true; + + int y1 = h/2; + int y2 = y1+ 1; + QRgb565* pixel1 = (QRgb565*)(buffer.scanLine(y1)) + x; + QRgb565* pixel2 = (QRgb565*)(buffer.scanLine(y2)) + x; + int pixelstep = pixel2 - pixel1; + +#ifdef PICTUREFLOW_BILINEAR_FILTER + int center = (sh*BILINEAR_STRETCH_VER/2); + int dy = dist*BILINEAR_STRETCH_VER / h; +#else + int center = (sh/2); + int dy = dist / h; +#endif + int p1 = center*PFREAL_ONE - dy/2; + int p2 = center*PFREAL_ONE + dy/2; + + const QRgb565 *ptr = (const QRgb565*)(src->scanLine(column)); + if(alpha == 256) + while((y1 >= 0) && (y2 < h) && (p1 >= 0)) + { + *pixel1 = ptr[p1 >> PFREAL_SHIFT]; + *pixel2 = ptr[p2 >> PFREAL_SHIFT]; + p1 -= dy; + p2 += dy; + y1--; + y2++; + pixel1 -= pixelstep; + pixel2 += pixelstep; + } + else + while((y1 >= 0) && (y2 < h) && (p1 >= 0)) + { + QRgb565 c1 = ptr[p1 >> PFREAL_SHIFT]; + QRgb565 c2 = ptr[p2 >> PFREAL_SHIFT]; + + *pixel1 = BYTE_MUL_RGB16(c1, alpha); + *pixel2 = BYTE_MUL_RGB16(c2, alpha); + +/* + int r1 = qRed(c1) * alpha/256; + int g1 = qGreen(c1) * alpha/256; + int b1 = qBlue(c1) * alpha/256; + int r2 = qRed(c2) * alpha/256; + int g2 = qGreen(c2) * alpha/256; + int b2 = qBlue(c2) * alpha/256; + *pixel1 = qRgb(r1, g1, b1); + *pixel2 = qRgb(r2, g2, b2); +*/ + p1 -= dy; + p2 += dy; + y1--; + y2++; + pixel1 -= pixelstep; + pixel2 += pixelstep; + } + } + + rect.setTop(0); + rect.setBottom(h-1); + return rect; +} + +// Updates look-up table and other stuff necessary for the rendering. +// Call this when the viewport size or slide dimension is changed. +void PictureFlowPrivate::recalc(int ww, int wh) +{ + int w = (ww+1)/2; + int h = (wh+1)/2; + buffer = QImage(ww, wh, QImage::Format_RGB16); + buffer.fill(0); + + rays.resize(w*2); + + for(int i = 0; i < w; i++) + { + PFreal gg = (PFREAL_HALF + i * PFREAL_ONE) / (2*h); + rays[w-i-1] = -gg; + rays[w+i] = gg; + } + + // pointer must move more than 1/15 of the window to enter drag mode + singlePressThreshold = ww / 15; +// qDebug() << "singlePressThreshold now set to " << singlePressThreshold; + + pixelsToMovePerSlide = ww / 3; +// qDebug() << "pixelsToMovePerSlide now set to " << pixelsToMovePerSlide; + + itilt = 80 * IANGLE_MAX / 360; // approx. 80 degrees tilted + + offsetY = slideWidth/2 * fsin(itilt); + offsetY += slideWidth * PFREAL_ONE / 4; + +// offsetX = slideWidth/2 * (PFREAL_ONE-fcos(itilt)); +// offsetX += slideWidth * PFREAL_ONE; + + // center slide + side slide + offsetX = slideWidth*PFREAL_ONE; +// offsetX = 150*PFREAL_ONE;//(slideWidth/2)*PFREAL_ONE + ( slideWidth*fcos(itilt) )/2; +// qDebug() << "center width = " << slideWidth; +// qDebug() << "side width = " << fixedToFloat(slideWidth/2 * (PFREAL_ONE-fcos(itilt))); +// qDebug() << "offsetX now " << fixedToFloat(offsetX); + + spacing = slideWidth/5; + + surfaceCache.clear(); + blankSurface = QImage(); +} + +void PictureFlowPrivate::startAnimation() +{ + if(!animateTimer.isActive()) + { + step = (target < centerSlide.slideIndex) ? -1 : 1; + animateTimer.start(30, widget); + } +} + +// Updates the animation effect. Call this periodically from a timer. +void PictureFlowPrivate::updateAnimation() +{ + if(!animateTimer.isActive()) + return; + if(step == 0) + return; + + int speed = 16384; + + // deaccelerate when approaching the target + if(true) + { + const int max = 2 * 65536; + + int fi = slideFrame; + fi -= (target << 16); + if(fi < 0) + fi = -fi; + fi = qMin(fi, max); + + int ia = IANGLE_MAX * (fi-max/2) / (max*2); + speed = 512 + 16384 * (PFREAL_ONE+fsin(ia))/PFREAL_ONE; + } + + slideFrame += speed*step; + + int index = slideFrame >> 16; + int pos = slideFrame & 0xffff; + int neg = 65536 - pos; + int tick = (step < 0) ? neg : pos; + PFreal ftick = (tick * PFREAL_ONE) >> 16; + + // the leftmost and rightmost slide must fade away + fade = pos / 256; + + if(step < 0) + index++; + if(centerIndex != index) + { + centerIndex = index; + slideFrame = index << 16; + centerSlide.slideIndex = centerIndex; + for(int i = 0; i < leftSlides.count(); i++) + leftSlides[i].slideIndex = centerIndex-1-i; + for(int i = 0; i < rightSlides.count(); i++) + rightSlides[i].slideIndex = centerIndex+1+i; + } + + centerSlide.angle = (step * tick * itilt) >> 16; + centerSlide.cx = -step * fmul(offsetX, ftick); + centerSlide.cy = fmul(offsetY, ftick); + + if(centerIndex == target) + { + resetSlides(); + animateTimer.stop(); + triggerRender(); + step = 0; + fade = 256; + return; + } + + for(int i = 0; i < leftSlides.count(); i++) + { + SlideInfo& si = leftSlides[i]; + si.angle = itilt; + si.cx = -(offsetX + spacing*i*PFREAL_ONE + step*spacing*ftick); + si.cy = offsetY; + } + + for(int i = 0; i < rightSlides.count(); i++) + { + SlideInfo& si = rightSlides[i]; + si.angle = -itilt; + si.cx = offsetX + spacing*i*PFREAL_ONE - step*spacing*ftick; + si.cy = offsetY; + } + + if(step > 0) + { + PFreal ftick = (neg * PFREAL_ONE) >> 16; + rightSlides[0].angle = -(neg * itilt) >> 16; + rightSlides[0].cx = fmul(offsetX, ftick); + rightSlides[0].cy = fmul(offsetY, ftick); + } + else + { + PFreal ftick = (pos * PFREAL_ONE) >> 16; + leftSlides[0].angle = (pos * itilt) >> 16; + leftSlides[0].cx = -fmul(offsetX, ftick); + leftSlides[0].cy = fmul(offsetY, ftick); + } + + // must change direction ? + if(target < index) if(step > 0) + step = -1; + if(target > index) if(step < 0) + step = 1; + + triggerRender(); +} + + +void PictureFlowPrivate::clearSurfaceCache() +{ + surfaceCache.clear(); +} + +// ----------------------------------------- + +PictureFlow::PictureFlow(QWidget* parent): QWidget(parent) +{ + d = new PictureFlowPrivate(this); + + setAttribute(Qt::WA_StaticContents, true); + setAttribute(Qt::WA_OpaquePaintEvent, true); + setAttribute(Qt::WA_NoSystemBackground, true); +} + +PictureFlow::~PictureFlow() +{ + delete d; +} + +int PictureFlow::slideCount() const +{ + return d->slideCount(); +} + +void PictureFlow::setSlideCount(int count) +{ + d->setSlideCount(count); +} + +QSize PictureFlow::slideSize() const +{ + return d->slideSize(); +} + +void PictureFlow::setSlideSize(QSize size) +{ + d->setSlideSize(size); +} + +int PictureFlow::zoomFactor() const +{ + return d->zoomFactor(); +} + +void PictureFlow::setZoomFactor(int z) +{ + d->setZoomFactor(z); +} + +QImage PictureFlow::slide(int index) const +{ + return d->slide(index); +} + +void PictureFlow::setSlide(int index, const QImage& image) +{ + d->setSlide(index, image); +} + +void PictureFlow::setSlide(int index, const QPixmap& pixmap) +{ + d->setSlide(index, pixmap.toImage()); +} + +void PictureFlow::setSlideCaption(int index, QString caption) +{ + d->captions[index] = caption; +} + + +int PictureFlow::currentSlide() const +{ + return d->currentSlide(); +} + +void PictureFlow::setCurrentSlide(int index) +{ + d->setCurrentSlide(index); +} + +void PictureFlow::clear() +{ + d->setSlideCount(0); +} + +void PictureFlow::clearCaches() +{ + d->clearSurfaceCache(); +} + +void PictureFlow::render() +{ + d->render(); + update(); +} + +void PictureFlow::showPrevious() +{ + d->showPrevious(); +} + +void PictureFlow::showNext() +{ + d->showNext(); +} + +void PictureFlow::showSlide(int index) +{ + d->showSlide(index); +} + +void PictureFlow::keyPressEvent(QKeyEvent* event) +{ + if(event->key() == Qt::Key_Left) + { + if(event->modifiers() == Qt::ControlModifier) + showSlide(currentSlide()-10); + else + showPrevious(); + event->accept(); + return; + } + + if(event->key() == Qt::Key_Right) + { + if(event->modifiers() == Qt::ControlModifier) + showSlide(currentSlide()+10); + else + showNext(); + event->accept(); + return; + } + + if (event->key() == Qt::Key_Enter || event->key() == Qt::Key_Select) { + emit itemActivated(d->getTarget()); + event->accept(); + return; + } + + event->ignore(); +} + +#define SPEED_LOWER_THRESHOLD 10 +#define SPEED_UPPER_LIMIT 40 + +void PictureFlow::mouseMoveEvent(QMouseEvent* event) +{ + int distanceMovedSinceLastEvent = event->pos().x() - d->previousPos.x(); + + // Check to see if we need to switch from single press mode to a drag mode + if (d->singlePress) + { + // Increment the distance moved for this event + d->pixelDistanceMoved += distanceMovedSinceLastEvent; + + // Check against threshold + if (qAbs(d->pixelDistanceMoved) > d->singlePressThreshold) + { + d->singlePress = false; +// qDebug() << "DRAG MODE ON"; + } + } + + if (!d->singlePress) + { + int speed; + // Calculate velocity in a 10th of a window width per second + if (d->previousPosTimestamp.elapsed() == 0) + speed = SPEED_LOWER_THRESHOLD; + else + { + speed = ((qAbs(event->pos().x()-d->previousPos.x())*1000) / d->previousPosTimestamp.elapsed()) + / (d->buffer.width() / 10); + + if (speed < SPEED_LOWER_THRESHOLD) + speed = SPEED_LOWER_THRESHOLD; + else if (speed > SPEED_UPPER_LIMIT) + speed = SPEED_UPPER_LIMIT; + else { + speed = SPEED_LOWER_THRESHOLD + (speed / 3); +// qDebug() << "ACCELERATION ENABLED Speed = " << speed << ", Distance = " << distanceMovedSinceLastEvent; + } + } + +// qDebug() << "Speed = " << speed; + +// int incr = ((event->pos().x() - d->previousPos.x())/10) * speed; + +// qDebug() << "Incremented by " << incr; + + int incr = (distanceMovedSinceLastEvent * speed); + + //qDebug() << "(distanceMovedSinceLastEvent * speed) = " << incr; + + if (incr > d->pixelsToMovePerSlide*2) { + incr = d->pixelsToMovePerSlide*2; + //qDebug() << "Limiting incr to " << incr; + } + + + d->pixelDistanceMoved += (distanceMovedSinceLastEvent * speed); + // qDebug() << "distance: " << d->pixelDistanceMoved; + + int slideInc; + + slideInc = d->pixelDistanceMoved / (d->pixelsToMovePerSlide * 10); + + if (slideInc != 0) { + int targetSlide = d->getTarget() - slideInc; + showSlide(targetSlide); +// qDebug() << "TargetSlide = " << targetSlide; + + //qDebug() << "Decrementing pixelDistanceMoved by " << (d->pixelsToMovePerSlide *10) * slideInc; + + d->pixelDistanceMoved -= (d->pixelsToMovePerSlide *10) * slideInc; + +/* + if ( (targetSlide <= 0) || (targetSlide >= d->slideCount()-1) ) + d->pixelDistanceMoved = 0; +*/ + } + } + + d->previousPos = event->pos(); + d->previousPosTimestamp.restart(); + + emit inputReceived(); +} + +void PictureFlow::mousePressEvent(QMouseEvent* event) +{ + d->firstPress = event->pos(); + d->previousPos = event->pos(); + d->previousPosTimestamp.start(); + d->singlePress = true; // Initially assume a single press +// d->dragStartSlide = d->getTarget(); + d->pixelDistanceMoved = 0; + + emit inputReceived(); +} + +void PictureFlow::mouseReleaseEvent(QMouseEvent* event) +{ + int sideWidth = (d->buffer.width() - slideSize().width()) /2; + + if (d->singlePress) + { + if (event->x() < sideWidth ) + { + showPrevious(); + } else if ( event->x() > sideWidth + slideSize().width() ) { + showNext(); + } else { + emit itemActivated(d->getTarget()); + } + + event->accept(); + } + + emit inputReceived(); +} + + +void PictureFlow::paintEvent(QPaintEvent* event) +{ + Q_UNUSED(event); + QPainter painter(this); + painter.setRenderHint(QPainter::Antialiasing, false); + painter.drawImage(QPoint(0,0), d->buffer); +} + +void PictureFlow::resizeEvent(QResizeEvent* event) +{ + d->resize(width(), height()); + QWidget::resizeEvent(event); +} + +void PictureFlow::timerEvent(QTimerEvent* event) +{ + if(event->timerId() == d->animateTimer.timerId()) + { +// QTime now = QTime::currentTime(); + d->updateAnimation(); +// d->animateTimer.start(qMax(0, 30-now.elapsed() ), this); + } + else + QWidget::timerEvent(event); +} |