move imageviewer sources to ui/imageviewer

1 files changed, 0 insertions, 1201 deletions

diff --git a/src/ui/pictureflow.cpp b/src/ui/pictureflow.cpp
deleted file mode 100644
index cd749f0..0000000
--- a/src/ui/pictureflow.cpp
+++ /dev/null
@@ -1,1201 +0,0 @@
-
-/***************************************************************************
- *   fqterm, a terminal emulator for both BBS and *nix.                    *
- *   Copyright (C) 2008 fqterm development group.                          *
- *                                                                         *
- *   This program is free software; you can redistribute it and/or modify  *
- *   it under the terms of the GNU General Public License as published by  *
- *   the Free Software Foundation; either version 2 of the License, or     *
- *   (at your option) any later version.                                   *
- *                                                                         *
- *   This program is distributed in the hope that it will be useful,       *
- *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
- *   GNU General Public License for more details.                          *
- *                                                                         *
- *   You should have received a copy of the GNU General Public License     *
- *   along with this program; if not, write to the                         *
- *   Free Software Foundation, Inc.,                                       *
- *   51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.               *
- ***************************************************************************/
-
-/*
-  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 <QMouseEvent>
-#include <QCache>
-#include <QImage>
-#include <QKeyEvent>
-#include <QPainter>
-#include <QPixmap>
-#include <QTimer>
-#include <QVector>
-#include <QWidget>
-
-// 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;
-#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;
-}
-
-#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));
-}
-
-namespace FQTerm {
-
-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);
-
-  void showPrevious();
-  void showNext();
-  void showSlide(int index);
-
-  void resize(int w, int h);
-
-  void render();
-  void startAnimation();
-  void updateAnimation();
-
-  QImage buffer;
-  QBasicTimer animateTimer;
-  QVector<QRect> slidesRect;
-
-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);
-  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::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 = centerIndex - 1;
-      startAnimation();
-    }
-  }
-  else
-  {
-    target = qMax(0, centerIndex - 2);
-  }
-}
-
-void PictureFlowPrivate::showNext()
-{
-  if(step <= 0)
-  {
-    if(centerIndex < slideImages.count()-1)
-    {
-      target = centerIndex + 1;
-      startAnimation();
-    }
-  }
-  else
-  {
-    target = qMin(centerIndex + 2, slideImages.count()-1);
-  }
-}
-
-void PictureFlowPrivate::showSlide(int index)
-{
-  index = qMax(index, 0);
-  index = qMin(slideImages.count()-1, index);
-
-  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(6);
-  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;
-  }
-
-  rightSlides.clear();
-  rightSlides.resize(6);
-  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;
-  }
-}
-
-#define BILINEAR_STRETCH_HOR 4
-#define BILINEAR_STRETCH_VER 4
-
-static QImage scaleImage (QImage image, int w, int h) {
-	// I don't have to scale it
-	if (w == image.width() && h == image.height())
-		return(image);
-
-	QImage output(w, h, QImage::Format_ARGB32_Premultiplied);
-	output.fill(0);
-
-	double scaleHeight = w / (double) image.height();
-	double scaleWidth = h / (double) image.width();
-
-	double s = qMin(scaleWidth, scaleHeight);
-
-	int sw = (int) qRound(s * image.width());
-	int sh = (int) qRound(s * image.height());
-
-	// Scale Image
-	QImage imgScaled = image.scaled(sw, sh, Qt::KeepAspectRatio, Qt::SmoothTransformation);
-
-	int _x = (w - sw) / 2;
-	int _y = (h - sh);
-
-	for (int x = 0; x < imgScaled.width(); ++x) {
-		for (int y = 0; y < imgScaled.height(); ++y) {
-			output.setPixel(x + _x, y + _y, imgScaled.pixel(x, y));
-		}
-	}
-
-	return(output);
-}
-
-static QImage prepareSurface(QImage img, int w, int h)
-{
-  img = scaleImage(img, w, h);
-
-  // slightly larger, to accomodate for the reflection
-  int hs = h * 2;
-  int hofs = h / 3;
-
-  // offscreen buffer: black is sweet
-  QImage result(hs, w, QImage::Format_RGB32);  
-  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);
-      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 = scaleImage(result, hh, ww);
-#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_RGB32);
-
-      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(Qt::black);
-
-  int nleft = leftSlides.count();
-  int nright = rightSlides.count();
-
-  QRect r = renderSlide(centerSlide);
-  int c1 = r.left();
-  int c2 = r.right();
-
-  if(step == 0)
-  {
-    slidesRect.clear();	
-	slidesRect.resize(11);
-
-    // 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);
-      slidesRect[index] = rs;
-      if(!rs.isEmpty())
-        c1 = rs.left();
-    }  
-    slidesRect[5] = r;
-    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());
-      slidesRect[6 + index] = rs;
-      if(!rs.isEmpty())
-        c2 = rs.right();
-    }  
-  }
-  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();
-    }  
-    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();
-    }  
-  }
-}
-
-// 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;
-    QRgb* pixel1 = (QRgb*)(buffer.scanLine(y1)) + x;
-    QRgb* pixel2 = (QRgb*)(buffer.scanLine(y2)) + x;
-    QRgb 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 QRgb *ptr = (const QRgb*)(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))
-      {
-        QRgb c1 = ptr[p1 >> PFREAL_SHIFT];
-        QRgb c2 = ptr[p2 >> PFREAL_SHIFT];
-
-        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_RGB32);
-  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;
-  }
-
-
-  itilt = 70 * IANGLE_MAX / 360;  // approx. 70 degrees tilted
-
-  offsetX = slideWidth/2 * (PFREAL_ONE-fcos(itilt));
-  offsetY = slideWidth/2 * fsin(itilt);
-  offsetX += slideWidth * PFREAL_ONE;
-  offsetY += slideWidth * PFREAL_ONE / 4;
-  spacing = 40;
-
-  surfaceCache.clear();
-  blankSurface = QImage();
-}
-
-void PictureFlowPrivate::startAnimation()
-{
-#if 1
-  if(!animateTimer.isActive())
-  {
-    step = (target < centerSlide.slideIndex) ? -1 : 1;
-    animateTimer.start(30, widget);
-  }
-#else
-  if (animateTimer.isActive())
-    animateTimer.stop();
-
-  step = (target < centerSlide.slideIndex) ? -1 : 1;
-  animateTimer.start(30, widget);
-#endif
-}
-
-// 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();
-}
-
-// -----------------------------------------
-
-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());
-}
-
-int PictureFlow::currentSlide() const
-{
-  return d->currentSlide();
-}
-
-void PictureFlow::setCurrentSlide(int index)
-{
-  d->setCurrentSlide(index);
-}
-
-void PictureFlow::clear()
-{
-  d->setSlideCount(0);
-}
-
-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::showSlideAt (int x, int y) {
-	if (d->slidesRect[5].contains(x, y))
-		return;
-
-	if (x < d->slidesRect[5].x()) {
-		for (int i=0; i < 5; ++i) {
-			if (d->slidesRect[i].contains(x, y)) {
-				showSlide(d->currentSlide() - (i + 1));
-				return;
-			}
-		}
-	} else {
-		for (int i=6; i < 11; ++i) {
-			if (d->slidesRect[i].contains(x, y)) {
-				showSlide(d->currentSlide() + (i - 5));
-				return;
-			}
-		}
-	}
-}
-
-void PictureFlow::keyPressEvent(QKeyEvent* event)
-{
-
-  switch (event->key()) {
-    case Qt::Key_Left:
-      if(event->modifiers() == Qt::AltModifier) {
-        showSlide(currentSlide() - 5);
-      } else {
-        showPrevious();
-      }
-      event->accept();
-      return;
-    case Qt::Key_Right:
-      if(event->modifiers() == Qt::AltModifier) {
-        showSlide(currentSlide() + 5);
-      } else {
-        showNext();
-      }
-      event->accept();
-      return;
-    case Qt::Key_Up:
-      showSlide(currentSlide() + 10);
-      event->accept();
-      return;
-    case Qt::Key_Down:
-      showSlide(currentSlide() - 10);
-      event->accept();
-      return;
-    default:
-      break;
-  }
-
-  event->ignore();
-}
-
-void PictureFlow::mouseReleaseEvent (QMouseEvent *event) {
-	showSlideAt(event->x(), event->y());
-}
-
-void PictureFlow::mouseMoveEvent (QMouseEvent *event) {
-	showSlideAt(event->x(), event->y());
-}
-
-void PictureFlow::wheelEvent (QWheelEvent *event) {
-	int numDegrees = event->delta() / 8;
-	int numSteps = numDegrees / 15;
-
-	d->showSlide(d->currentSlide() + numSteps);
-	event->accept();
-}
-
-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())
-    d->updateAnimation();
-  else
-    QWidget::timerEvent(event);
-}
-
-} // namespace FQTerm
-
-#include "pictureflow.moc"