solve edge case
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dennisarfan
parent
741d34a5e0
commit
0472bfe58e
15 changed files with 685 additions and 47 deletions
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@ -39,25 +39,35 @@ public sealed class DangerousImageCreator : IDisposable
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~DangerousImageCreator() => Dispose();
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public async Task WriteToPipe(PipeWriter outputPipe, float scale, CancellationToken cancellationToken = default)
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public async Task WriteToPipe2(PipeWriter outputPipe, float scale, CancellationToken cancellationToken = default)
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{
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var scaleFactor = MathF.ReciprocalEstimate(scale);
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var targetWidth = (int)(Width / scaleFactor);
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var targetHeight = (int)(Height / scaleFactor);
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if (targetHeight == 0 || targetWidth == 0)
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return;
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var encoder = new PngPipeEncoder(outputPipe, targetWidth, targetHeight);
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encoder.WriteHeader();
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var outputBufferSize = targetWidth * Unsafe.SizeOf<Rgb24>();
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using var xLookup = Utils.BoundsMatrix(scaleFactor, targetWidth, FullWidth, OffsetX);
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using var yLookup = Utils.BoundsMatrix(scaleFactor, targetHeight, FullHeight, OffsetY);
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var xLookup = Utils.DoubleBoundsMatrix(scaleFactor, targetWidth, FullWidth, OffsetX);
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var yLookup = Utils.DoubleBoundsMatrix(scaleFactor, targetHeight, FullHeight, OffsetY);
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using var yStartMap = MemoryAllocator.Allocate<Int32Pixel>(targetWidth);
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using var yEndMap = MemoryAllocator.Allocate<Int32Pixel>(targetWidth);
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using var xLookup0 = xLookup.Item1;
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using var xLookup1 = xLookup.Item2;
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using var yLookup0 = yLookup.Item1;
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using var yLookup1 = yLookup.Item2;
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using var yStartMap0 = MemoryAllocator.Allocate<Int32Pixel>(targetWidth);
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using var yStartMap1 = MemoryAllocator.Allocate<Int32Pixel>(targetWidth);
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using var yEndMap0 = MemoryAllocator.Allocate<Int32Pixel>(targetWidth);
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using var yEndMap1 = MemoryAllocator.Allocate<Int32Pixel>(targetWidth);
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var yStart = OffsetY;
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// var yStart = OffsetY;
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// Use pixel referencing to eliminate type casting
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var pxInt32 = Int32Pixel.Zero;
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ref var px = ref pxInt32;
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ref var rChannel = ref Unsafe.As<Int32Pixel, byte>(ref px);
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@ -67,27 +77,151 @@ public sealed class DangerousImageCreator : IDisposable
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var outputTaskQueue = TaskHelper.SynchronizedTaskFactory.StartNew(() => { }, cancellationToken);
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for (var y = 0; y < targetHeight; y++)
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{
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var yEnd = yLookup[y];
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var yStart = yLookup0[y];
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var yEnd = yLookup1[y];
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var (localRow0, localOffsetY0) = int.DivRem(yStart, TileHeight);
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MapRow(localRow0, localOffsetY0, xLookup, targetWidth, yStartMap);
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MapRow(localRow0, localOffsetY0, xLookup0, targetWidth, yStartMap0);
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MapRow(localRow0, localOffsetY0, xLookup1, targetWidth, yStartMap1);
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var (localRow1, localOffsetY1) = int.DivRem(yEnd, TileHeight);
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MapRow(localRow1, localOffsetY1, xLookup, targetWidth, yEndMap);
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MapRow(localRow1, localOffsetY1, xLookup0, targetWidth, yEndMap0);
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MapRow(localRow1, localOffsetY1, xLookup1, targetWidth, yEndMap1);
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if (localRow0 != localRow1)
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{
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MapRow(localRow0, BottomPixelIndex, xLookup, targetWidth, yEndMap, true);
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MapRow(localRow0, BottomPixelIndex, xLookup0, targetWidth, yEndMap0, true);
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MapRow(localRow0, BottomPixelIndex, xLookup1, targetWidth, yEndMap1, true);
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}
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int xStart = OffsetX, x0 = 0;
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// int xStart = OffsetX, x0 = 0;
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var outputBuffer = MemoryAllocator.Allocate<byte>(outputBufferSize);
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ref var outputChannel = ref outputBuffer.Span[0];
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var boxHeight = yEnd - yStart;
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for (int x1 = 0; x1 < targetWidth; x1++)
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var boxHeight = Math.Max(1, yEnd - yStart);
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for (int x = 0; x < targetWidth; x++)
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{
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var xEnd = xLookup[x1];
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var xStart = xLookup0[x];
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var xEnd = xLookup1[x];
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px = yEndMap1[x];
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px += yStartMap0[x];
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px -= yEndMap0[x];
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px -= yStartMap1[x];
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px /= Math.Max(1, xEnd - xStart) * boxHeight;
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outputChannel = rChannel;
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outputChannel = ref Unsafe.AddByteOffset(ref outputChannel, 1);
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outputChannel = gChannel;
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outputChannel = ref Unsafe.AddByteOffset(ref outputChannel, 1);
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outputChannel = bChannel;
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outputChannel = ref Unsafe.AddByteOffset(ref outputChannel, 1);
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// xStart = xEnd;
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// x0 = x;
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}
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outputTaskQueue = outputTaskQueue
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.ContinueWith(async _ =>
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{
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await encoder.WriteDataAsync(outputBuffer, cancellationToken: cancellationToken);
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}, cancellationToken);
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yStart = yEnd;
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}
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await outputTaskQueue;
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await encoder.WriteEndOfFileAsync(cancellationToken);
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}
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public async Task WriteToPipe(PipeWriter outputPipe, float scale, CancellationToken cancellationToken = default)
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{
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var scaleFactor = MathF.ReciprocalEstimate(scale);
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var targetWidth = (int)(Width / scaleFactor);
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var targetHeight = (int)(Height / scaleFactor);
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if (targetHeight == 0 || targetWidth == 0)
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return;
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var encoder = new PngPipeEncoder(outputPipe, targetWidth, targetHeight);
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encoder.WriteHeader();
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Task outputTaskQueue;
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var outputBufferSize = targetWidth * Unsafe.SizeOf<Rgb24>();
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using var xLookup = Utils.BoundsMatrix(scaleFactor, targetWidth, FullWidth, OffsetX);
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using var yLookup = Utils.BoundsMatrix(scaleFactor, targetHeight, FullHeight, OffsetY);
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using var yStartMap = MemoryAllocator.Allocate<Int32Pixel>(targetWidth + 1);
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using var yEndMap = MemoryAllocator.Allocate<Int32Pixel>(targetWidth + 1);
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// OffsetX-(int)float.Ceiling(scaleFactor)
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int yStart = OffsetY,
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yEnd = yLookup[0],
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xStart = OffsetX,
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x0 = 0;
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// Use pixel referencing to eliminate type casting
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var pxInt32 = Int32Pixel.Zero;
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ref var px = ref pxInt32;
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ref var rChannel = ref Unsafe.As<Int32Pixel, byte>(ref px);
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ref var gChannel = ref Unsafe.Add(ref rChannel, 4);
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ref var bChannel = ref Unsafe.Add(ref rChannel, 8);
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// First row
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var (localRow0, localOffsetY0) = int.DivRem(yStart, TileHeight);
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var (localRow1, localOffsetY1) = int.DivRem(yEnd, TileHeight);
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{
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switch (localOffsetY0)
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{
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// Cross row tile, no need to handle if it's first row tile for now
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// the provided asset is bordered black anyway
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case 0 when TileOrigin.Row > 1:
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localOffsetY0 = BottomPixelIndex;
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localRow0--;
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break;
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case > 0:
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localOffsetY0--;
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break;
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}
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MapRow(localRow0, localOffsetY0, xLookup, targetWidth, yStartMap);
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MapRow(localRow1, localOffsetY1, xLookup, targetWidth, yEndMap);
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// Cross row
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if (localRow0 != localRow1)
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MapRow(localRow0, BottomPixelIndex, xLookup, targetWidth, yEndMap, true);
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var outputBuffer = MemoryAllocator.Allocate<byte>(outputBufferSize);
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ref var outputChannel = ref outputBuffer.Span[0];
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var boxHeight = yEnd - yStart;
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// Render first pixel row
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var xEnd = xLookup[0];
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px = yEndMap[0];
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px += yStartMap[^1];
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px -= yEndMap[^1];
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px -= yStartMap[0];
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px /= Math.Max(1, (xEnd - xStart) * boxHeight);
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outputChannel = rChannel;
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outputChannel = ref Unsafe.AddByteOffset(ref outputChannel, 1);
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outputChannel = gChannel;
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outputChannel = ref Unsafe.AddByteOffset(ref outputChannel, 1);
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outputChannel = bChannel;
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outputChannel = ref Unsafe.AddByteOffset(ref outputChannel, 1);
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xStart = xEnd;
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// Render entire pixel row
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for (int x1 = 1; x1 < targetWidth; x1++)
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{
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xEnd = xLookup[x1];
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px = yEndMap[x1];
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px += yStartMap[x0];
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@ -96,13 +230,83 @@ public sealed class DangerousImageCreator : IDisposable
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px /= Math.Max(1, (xEnd - xStart) * boxHeight);
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outputChannel = rChannel;
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outputChannel = ref Unsafe.Add(ref outputChannel, 1);
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outputChannel = ref Unsafe.AddByteOffset(ref outputChannel, 1);
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outputChannel = gChannel;
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outputChannel = ref Unsafe.Add(ref outputChannel, 1);
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outputChannel = ref Unsafe.AddByteOffset(ref outputChannel, 1);
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outputChannel = bChannel;
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outputChannel = ref Unsafe.Add(ref outputChannel, 1);
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outputChannel = ref Unsafe.AddByteOffset(ref outputChannel, 1);
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xStart = xEnd;
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x0 = x1;
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}
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outputTaskQueue = TaskHelper.SynchronizedTaskFactory.StartNew(async _ =>
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{
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await encoder.WriteDataAsync(outputBuffer, cancellationToken: cancellationToken);
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}, null, cancellationToken);
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yStart = yEnd;
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}
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for (var y = 1; y < targetHeight; y++)
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{
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yEnd = yLookup[y];
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(localRow0, localOffsetY0) = int.DivRem(yStart, TileHeight);
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MapRow(localRow0, localOffsetY0, xLookup, targetWidth, yStartMap);
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(localRow1, localOffsetY1) = int.DivRem(yEnd, TileHeight);
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MapRow(localRow1, localOffsetY1, xLookup, targetWidth, yEndMap);
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// Cross row
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if (localRow0 != localRow1)
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MapRow(localRow0, BottomPixelIndex, xLookup, targetWidth, yEndMap, true);
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xStart = OffsetX;
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x0 = 0;
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var outputBuffer = MemoryAllocator.Allocate<byte>(outputBufferSize);
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ref var outputChannel = ref outputBuffer.Span[0];
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var boxHeight = yEnd - yStart;
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var xEnd = xLookup[0];
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px = yEndMap[0];
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px += yStartMap[^1];
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px -= yEndMap[^1];
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px -= yStartMap[0];
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px /= Math.Max(1, (xEnd - xStart) * boxHeight);
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outputChannel = rChannel;
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outputChannel = ref Unsafe.AddByteOffset(ref outputChannel, 1);
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outputChannel = gChannel;
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outputChannel = ref Unsafe.AddByteOffset(ref outputChannel, 1);
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outputChannel = bChannel;
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outputChannel = ref Unsafe.AddByteOffset(ref outputChannel, 1);
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xStart = xEnd;
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for (int x1 = 1; x1 < targetWidth; x1++)
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{
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xEnd = xLookup[x1];
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px = yEndMap[x1];
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px += yStartMap[x0];
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px -= yEndMap[x0];
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px -= yStartMap[x1];
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px /= Math.Max(1, (xEnd - xStart) * boxHeight);
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outputChannel = rChannel;
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outputChannel = ref Unsafe.AddByteOffset(ref outputChannel, 1);
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outputChannel = gChannel;
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outputChannel = ref Unsafe.AddByteOffset(ref outputChannel, 1);
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outputChannel = bChannel;
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outputChannel = ref Unsafe.AddByteOffset(ref outputChannel, 1);
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xStart = xEnd;
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x0 = x1;
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@ -136,10 +340,31 @@ public sealed class DangerousImageCreator : IDisposable
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var written = 0;
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var destinationSpan = destination.Span;
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var readBufferSpan = _mmfReadBuffer.Span;
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var negative = sourceMap[0] - 1;
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var negativePixel = appendMode ? destinationSpan[^1] : Int32Pixel.Zero;
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if (negative >= 0)
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{
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negativePixel = readBufferSpan[negative];
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}
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else if(currentTile.Column > 1)
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{
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// Cross row tile, no need to handle if it's first column tile for now
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// the provided asset is bordered black anyway
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TileManager.GetAdjacent(currentTile, -1, 0)
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.Integral
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.Acquire(yOffset, readBufferSpan);
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negativePixel = readBufferSpan[RightmostPixelIndex];
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xAdder = readBufferSpan[RightmostPixelIndex];
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}
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destinationSpan[^1] = negativePixel;
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while (true)
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{
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currentTile.Integral.Acquire(yOffset, readBufferSpan);
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int localX;
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if (appendMode)
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{
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while (written < sourceMap.Length && (localX = sourceMap[written] - xOffset) < TileWidth)
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