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Rewrite OrientImage

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This commit is contained in:
Patrick Barron 2020-07-19 17:59:33 -04:00
parent 2569793ff0
commit b51a10948a
1 changed files with 39 additions and 102 deletions
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133
Jellyfin.Drawing.Skia/SkiaEncoder.cs
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@ -372,120 +372,57 @@ namespace Jellyfin.Drawing.Skia
private SKBitmap OrientImage(SKBitmap bitmap, SKEncodedOrigin origin) private SKBitmap OrientImage(SKBitmap bitmap, SKEncodedOrigin origin)
{ {
if (origin == SKEncodedOrigin.Default)
{
return bitmap;
}
var needsFlip = origin == SKEncodedOrigin.LeftBottom
|| origin == SKEncodedOrigin.LeftTop
|| origin == SKEncodedOrigin.RightBottom
|| origin == SKEncodedOrigin.RightTop;
var rotated = needsFlip
? new SKBitmap(bitmap.Height, bitmap.Width)
: new SKBitmap(bitmap.Width, bitmap.Height);
using var surface = new SKCanvas(rotated);
var midX = (float)rotated.Width / 2;
var midY = (float)rotated.Height / 2;
switch (origin) switch (origin)
{ {
case SKEncodedOrigin.TopRight: case SKEncodedOrigin.TopRight:
{ surface.Scale(-1, 1, midX, midY);
var rotated = new SKBitmap(bitmap.Width, bitmap.Height); break;
using var surface = new SKCanvas(rotated);
surface.Translate(rotated.Width, 0);
surface.Scale(-1, 1);
surface.DrawBitmap(bitmap, 0, 0);
return rotated;
}
case SKEncodedOrigin.BottomRight: case SKEncodedOrigin.BottomRight:
{ surface.RotateDegrees(180, midX, midY);
var rotated = new SKBitmap(bitmap.Width, bitmap.Height); break;
using var surface = new SKCanvas(rotated);
float px = (float)bitmap.Width / 2;
float py = (float)bitmap.Height / 2;
surface.RotateDegrees(180, px, py);
surface.DrawBitmap(bitmap, 0, 0);
return rotated;
}
case SKEncodedOrigin.BottomLeft: case SKEncodedOrigin.BottomLeft:
{ surface.Scale(1, -1, midX, midY);
var rotated = new SKBitmap(bitmap.Width, bitmap.Height); break;
using var surface = new SKCanvas(rotated);
float px = (float)bitmap.Width / 2;
float py = (float)bitmap.Height / 2;
surface.Translate(rotated.Width, 0);
surface.Scale(-1, 1);
surface.RotateDegrees(180, px, py);
surface.DrawBitmap(bitmap, 0, 0);
return rotated;
}
case SKEncodedOrigin.LeftTop: case SKEncodedOrigin.LeftTop:
{ surface.Translate(0, -rotated.Height);
// TODO: Remove dual canvases, had trouble with flipping surface.Scale(1, -1, midX, midY);
using var rotated = new SKBitmap(bitmap.Height, bitmap.Width); surface.RotateDegrees(-90);
using (var surface = new SKCanvas(rotated)) break;
{
surface.Translate(rotated.Width, 0);
surface.RotateDegrees(90);
surface.DrawBitmap(bitmap, 0, 0);
}
var flippedBitmap = new SKBitmap(rotated.Width, rotated.Height);
using (var flippedCanvas = new SKCanvas(flippedBitmap))
{
flippedCanvas.Translate(flippedBitmap.Width, 0);
flippedCanvas.Scale(-1, 1);
flippedCanvas.DrawBitmap(rotated, 0, 0);
}
return flippedBitmap;
}
case SKEncodedOrigin.RightTop: case SKEncodedOrigin.RightTop:
{
var rotated = new SKBitmap(bitmap.Height, bitmap.Width);
using var surface = new SKCanvas(rotated);
surface.Translate(rotated.Width, 0); surface.Translate(rotated.Width, 0);
surface.RotateDegrees(90); surface.RotateDegrees(90);
surface.DrawBitmap(bitmap, 0, 0); break;
return rotated;
}
case SKEncodedOrigin.RightBottom: case SKEncodedOrigin.RightBottom:
{ surface.Translate(rotated.Width, 0);
// TODO: Remove dual canvases, had trouble with flipping surface.Scale(1, -1, midX, midY);
using var rotated = new SKBitmap(bitmap.Height, bitmap.Width); surface.RotateDegrees(90);
using (var surface = new SKCanvas(rotated)) break;
{
surface.Translate(0, rotated.Height);
surface.RotateDegrees(270);
surface.DrawBitmap(bitmap, 0, 0);
}
var flippedBitmap = new SKBitmap(rotated.Width, rotated.Height);
using (var flippedCanvas = new SKCanvas(flippedBitmap))
{
flippedCanvas.Translate(flippedBitmap.Width, 0);
flippedCanvas.Scale(-1, 1);
flippedCanvas.DrawBitmap(rotated, 0, 0);
}
return flippedBitmap;
}
case SKEncodedOrigin.LeftBottom: case SKEncodedOrigin.LeftBottom:
{
var rotated = new SKBitmap(bitmap.Height, bitmap.Width);
using var surface = new SKCanvas(rotated);
surface.Translate(0, rotated.Height); surface.Translate(0, rotated.Height);
surface.RotateDegrees(270); surface.RotateDegrees(-90);
break;
}
surface.DrawBitmap(bitmap, 0, 0); surface.DrawBitmap(bitmap, 0, 0);
return rotated; return rotated;
} }
default: return bitmap;
}
}
/// <inheritdoc/> /// <inheritdoc/>
public string EncodeImage(string inputPath, DateTime dateModified, string outputPath, bool autoOrient, ImageOrientation? orientation, int quality, ImageProcessingOptions options, ImageFormat selectedOutputFormat) public string EncodeImage(string inputPath, DateTime dateModified, string outputPath, bool autoOrient, ImageOrientation? orientation, int quality, ImageProcessingOptions options, ImageFormat selectedOutputFormat)
{ {