Shamusworld >> Repos - wozmaker/blob - src/diskdrawthread.cpp

   1 //
   2 // diskdrawthread.cpp: Disk display thread
   3 //
   4 // Part of the WOZ Maker project
   5 // by James Hammons
   6 // (C) 2018 Underground Software
   7 //
   8 // Since this can take a bit of time, we shunt all the heavy lifting to a
   9 // separate worker thread so that it doesn't block the GUI thread.
  10 //
  11
  12 #include "diskdrawthread.h"
  13
  14 #include <QtWidgets>
  15 #include <cmath>
  16 #include "fileio.h"
  17 #include "global.h"
  18
  19
  20 DiskDrawThread::DiskDrawThread(QObject * parent): QThread(parent)
  21 {
  22 }
  23
  24
  25 DiskDrawThread::~DiskDrawThread()
  26 {
  27 #if 0
  28         mutex.lock();
  29         abort = true;
  30         condition.wakeOne();
  31         mutex.unlock();
  32
  33         wait();
  34 #endif
  35 }
  36
  37
  38 void DiskDrawThread::StartRender(QImage * i)
  39 {
  40         img = i;
  41         start(LowPriority);
  42 }
  43
  44
  45 void DiskDrawThread::run()
  46 {
  47         DrawDisk(img);
  48 }
  49
  50
  51 void DiskDrawThread::DrawDisk(QImage * diskImg)
  52 {
  53         QPainter painter(diskImg);
  54         painter.setRenderHint(QPainter::Antialiasing);
  55
  56         QPen dkGreyPen(QColor(0x3A, 0x3B, 0x3A, 0xFF));
  57         QBrush dkGreyBrush(QColor(0x3A, 0x3B, 0x3A, 0xFF));
  58
  59         // Draw empty disk
  60         painter.setPen(dkGreyPen);
  61         painter.setBrush(dkGreyBrush);
  62         painter.drawEllipse(0, 0, 1024, 1024);
  63         painter.setPen(Qt::white);
  64         painter.setBrush(Qt::white);
  65         painter.drawEllipse(388, 388, 248, 248);
  66
  67 /*
  68 945 - 1067
  69 948-949 (brighter to the 949 side) 1063-1064 (brighter to the 1064 side)
  70
  71 116 px for 36 tracks (3.2857... px per track)
  72
  73 3px on each side of the tracks
  74
  75 388 / 122 = 3.1803278688525
  76 qtr track width = 2.6836879432624
  77 */
  78         // Draw disk track data
  79         uint8_t lastLocation = 0xFF;
  80         float x = 9.6, y = 9.6, w = 1024.0 - (2.0 * 9.6);
  81         float tw = 2.6156028368794;
  82
  83         for(uint32_t str=0; str<Global::numStreams; str++)
  84         {
  85 //N.B.: Should also make sure this isn't a BITS stream, or handle it properly (because right now, it doesn't)
  86                 if (Global::stream[str]->location != lastLocation)
  87                 {
  88                         uint32_t splicePoint = Uint32LE(Global::stream[str]->estLoopPoint);
  89                         float angleTime = (float)splicePoint / (5760.0f / 2.0f);
  90                         uint32_t pos = 0;
  91                         float strTime = 0;
  92                         float curTime = angleTime;
  93
  94                         for(uint32_t i=0; i<5760; i+=2)
  95                         {
  96                                 float ones = 0;
  97
  98                                 while (strTime < curTime)
  99                                 {
 100                                         while (Global::stream[str]->data[pos] == 0xFF)
 101                                                 strTime += Global::stream[str]->data[pos++];
 102
 103                                         strTime += Global::stream[str]->data[pos++];
 104                                         ones += 1.0f;
 105                                 }
 106
 107                                 uint32_t color = ((ones * 32.0f) / angleTime) * 255.0f;
 108
 109                                 if (color > 255)
 110                                         color = 255;
 111
 112                                 painter.setPen(QPen(QColor(color, color, color, 0xFF), tw, Qt::SolidLine));
 113                                 painter.drawArc(x, y, w, w, -i + 1440, 2);
 114
 115                                 curTime += angleTime;
 116                         }
 117
 118                         x += tw;
 119                         y += tw;
 120                         w -= tw * 2.0;
 121                         lastLocation = Global::stream[str]->location;
 122                         emit(ShowDisk());
 123                 }
 124         }
 125
 126 //      emit(ShowDisk());
 127 }
 128