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Draw both spirals in GD-ROM and GD-R discs.

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This commit is contained in:
Natalia Portillo
2022-12-04 18:26:08 +00:00
parent 5ce3026053
commit 4d1f7b553e
1 changed files with 109 additions and 29 deletions
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138
Aaru.Core/Graphics/Spiral.cs
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@@ -86,10 +86,17 @@ public sealed class Spiral
new(120, 15, 33, 46, 48, 116, 44, 46, 7864320, new SKColor(0xff, 0x91, 0x00));
static readonly DiscParameters _hddvdRwParameters =
new(120, 15, 33, 46, 48, 116, 44, 46, 7864320, new SKColor(0x30, 0x30, 0x30));
static readonly DiscParameters _umdParameters =
new(60, 11.025f, 16.2f, 28, 32, 56, 0, 0, 471872, new SKColor(0x6f, 0x0A, 0xCA));
static readonly DiscParameters _gdParameters = new(120, 15, 33, 46, 50, 116, 0, 0, 550000, SKColors.Silver);
static readonly DiscParameters _gdRecordableParameters =
new(120, 15, 33, 46, 50, 116, 45, 46, 550000, new SKColor(0xBD, 0xA0, 0x00));
readonly SKCanvas _canvas;
readonly bool _gdrom;
readonly List<SKPoint> _leadInPoints;
readonly long _maxSector;
readonly List<SKPoint> _points;
readonly List<SKPoint> _pointsLowDensity;
readonly List<SKPoint> _recordableInformationPoints;
/// <summary>Initializes a spiral</summary>
@@ -99,6 +106,12 @@ public sealed class Spiral
/// <param name="lastSector">Last sector that will be drawn into the spiral</param>
public Spiral(int width, int height, DiscParameters parameters, ulong lastSector)
{
if(parameters == _gdParameters ||
parameters == _gdRecordableParameters)
_gdrom = true;
// GD-ROM LD area ends at 29mm, HD area starts at 30mm radius
Bitmap = new SKBitmap(width, height);
_canvas = new SKCanvas(Bitmap);
@@ -165,11 +178,12 @@ public sealed class Spiral
StrokeWidth = 4
});
// Some trigonometry thing I do not understand fully
// Some trigonometry thing I do not understand fully but it controls the space between the spiral turns
const float a = 1f;
// Draw the Lead-In
_leadInPoints = GetSpiralPoints(center, informationAreaStartDiameter / 2, leadInEndDiameter / 2, a);
_leadInPoints = GetSpiralPoints(center, informationAreaStartDiameter / 2, leadInEndDiameter / 2,
_gdrom ? a : a * 1.5f);
var path = new SKPath();
@@ -186,25 +200,66 @@ public sealed class Spiral
});
// If there's a recordable information area, get its points
if(recordableAreaEndDiameter > 0 &&
if(recordableAreaEndDiameter > 0 &&
recordableAreaStartDiameter > 0)
_recordableInformationPoints =
GetSpiralPoints(center, recordableAreaStartDiameter / 2, recordableAreaEndDiameter / 2, a);
_recordableInformationPoints = GetSpiralPoints(center, recordableAreaStartDiameter / 2,
recordableAreaEndDiameter / 2, _gdrom ? a : a * 1.5f);
_points = GetSpiralPoints(center, leadInEndDiameter / 2, informationAreaEndDiameter / 2, a);
if(_gdrom)
{
float lowDensityEndDiameter = smallerDimension * 29 * 2 / parameters.DiscDiameter;
float highDensityStartDiameter = smallerDimension * 30 * 2 / parameters.DiscDiameter;
_pointsLowDensity = GetSpiralPoints(center, leadInEndDiameter / 2, lowDensityEndDiameter / 2, a * 1.5f);
_points = GetSpiralPoints(center, highDensityStartDiameter / 2, informationAreaEndDiameter / 2, a);
}
else
_points = GetSpiralPoints(center, leadInEndDiameter / 2, informationAreaEndDiameter / 2, a);
path = new SKPath();
if(_gdrom && _pointsLowDensity is not null)
{
path.MoveTo(_pointsLowDensity[0]);
foreach(SKPoint point in _pointsLowDensity)
path.LineTo(point);
_canvas.DrawPath(path, new SKPaint
{
Style = SKPaintStyle.Stroke,
Color = SKColors.Gray,
StrokeWidth = 2
});
}
path.MoveTo(_points[0]);
long pointsPerSector = _points.Count / _maxSector;
long sectorsPerPoint = _maxSector / _points.Count;
long pointsPerSector;
long sectorsPerPoint;
if(_maxSector % _points.Count > 0)
sectorsPerPoint++;
if(_gdrom)
{
pointsPerSector = _points.Count / (_maxSector - 45000);
sectorsPerPoint = (_maxSector - 45000) / _points.Count;
if((_maxSector - 45000) % _points.Count > 0)
sectorsPerPoint++;
}
else
{
pointsPerSector = _points.Count / _maxSector;
sectorsPerPoint = _maxSector / _points.Count;
if(_maxSector % _points.Count > 0)
sectorsPerPoint++;
}
long lastPoint;
if(_gdrom)
lastSector1 -= 45000;
if(pointsPerSector > 0)
lastPoint = lastSector1 * pointsPerSector;
else
@@ -227,9 +282,6 @@ public sealed class Spiral
public SKBitmap Bitmap { get; }
public static DiscParameters DiscParametersFromMediaType(MediaType mediaType, bool smallDisc = false) =>
// TODO: UMD
// TODO: GD-ROM
mediaType switch
{
MediaType.CD => _cdParameters,
@@ -303,6 +355,9 @@ public sealed class Spiral
MediaType.CVD => _cdParameters,
MediaType.Playdia => _cdParameters,
MediaType.WUOD => _bdParameters,
MediaType.UMD => _umdParameters,
MediaType.GDROM => _gdParameters,
MediaType.GDR => _gdRecordableParameters,
_ => null
};
@@ -348,11 +403,38 @@ public sealed class Spiral
/// <param name="color">Color to paint the segment</param>
public void PaintSector(ulong sector, SKColor color)
{
long pointsPerSector = _points.Count / _maxSector;
long sectorsPerPoint = _maxSector / _points.Count;
long pointsPerSector;
long sectorsPerPoint;
List<SKPoint> points = _gdrom && sector <= 45000 ? _pointsLowDensity : _points;
if(_maxSector % _points.Count > 0)
sectorsPerPoint++;
if(_gdrom)
{
if(sector <= 45000)
{
pointsPerSector = points.Count / 45000;
sectorsPerPoint = 45000 / points.Count;
if(45000 % points.Count > 0)
sectorsPerPoint++;
}
else
{
sector -= 45000;
pointsPerSector = points.Count / (_maxSector - 45000);
sectorsPerPoint = (_maxSector - 45000) / points.Count;
if((_maxSector - 45000) % points.Count > 0)
sectorsPerPoint++;
}
}
else
{
pointsPerSector = points.Count / _maxSector;
sectorsPerPoint = _maxSector / points.Count;
if(_maxSector % points.Count > 0)
sectorsPerPoint++;
}
var paint = new SKPaint
{
@@ -367,10 +449,10 @@ public sealed class Spiral
{
long firstPoint = (long)sector * pointsPerSector;
path.MoveTo(_points[(int)firstPoint]);
path.MoveTo(points[(int)firstPoint]);
for(int i = (int)firstPoint; i < firstPoint + pointsPerSector; i++)
path.LineTo(_points[i]);
path.LineTo(points[i]);
_canvas.DrawPath(path, paint);
@@ -381,18 +463,18 @@ public sealed class Spiral
if(point == 0)
{
path.MoveTo(_points[0]);
path.LineTo(_points[1]);
path.MoveTo(points[0]);
path.LineTo(points[1]);
}
else if(point >= _points.Count - 1)
else if(point >= points.Count - 1)
{
path.MoveTo(_points[^2]);
path.LineTo(_points[^1]);
path.MoveTo(points[^2]);
path.LineTo(points[^1]);
}
else
{
path.MoveTo(_points[(int)point]);
path.LineTo(_points[(int)point + 1]);
path.MoveTo(points[(int)point]);
path.LineTo(points[(int)point + 1]);
}
_canvas.DrawPath(path, paint);
@@ -476,7 +558,7 @@ public sealed class Spiral
{
// Get the points.
List<SKPoint> points = new();
const float dtheta = (float)(0.5 * Math.PI / 180); // Five degrees.
const float dtheta = (float)(0.5f * Math.PI / 180);
for(float theta = 0;; theta += dtheta)
{
@@ -505,8 +587,6 @@ public sealed class Spiral
return points;
}
// GD-ROM LD area ends at 29mm, HD area starts at 30mm radius
/// <summary>Defines the physical disc parameters</summary>
/// <param name="DiscDiameter">Diameter of the whole disc</param>
/// <param name="CenterHole">Diameter of the hole at the center</param>