public void IterateRows_OverMinimumPixelsLimit_ShouldVisitAllRows(
int maxDegreeOfParallelism,
int minY,
int maxY,
int expectedStepLength,
int expectedLastStepLength,
int expectedNumberOfSteps)
{
var parallelSettings = new ParallelExecutionSettings(
maxDegreeOfParallelism,
1,
Configuration.Default.MemoryAllocator);
var rectangle = new Rectangle(0, minY, 10, maxY - minY);
int[] expectedData = Enumerable.Repeat(0, minY).Concat(Enumerable.Range(minY, maxY - minY)).ToArray();
var actualData = new int[maxY];
void RowAction(RowInterval rows)
{
for (int y = rows.Min; y < rows.Max; y++)
{
actualData[y] = y;
}
}
var operation = new TestRowIntervalOperation(RowAction);
ParallelRowIterator.IterateRowIntervals(
rectangle,
in parallelSettings,
in operation);
Assert.Equal(expectedData, actualData);
}
public void IterateRectangularBuffer(
int maxDegreeOfParallelism,
int bufferWidth,
int bufferHeight,
int rectX,
int rectY,
int rectWidth,
int rectHeight)
{
MemoryAllocator memoryAllocator = Configuration.Default.MemoryAllocator;
using (Buffer2D <Point> expected = memoryAllocator.Allocate2D <Point>(bufferWidth, bufferHeight, AllocationOptions.Clean))
using (Buffer2D <Point> actual = memoryAllocator.Allocate2D <Point>(bufferWidth, bufferHeight, AllocationOptions.Clean))
{
var rect = new Rectangle(rectX, rectY, rectWidth, rectHeight);
void FillRow(int y, Buffer2D <Point> buffer)
{
for (int x = rect.Left; x < rect.Right; x++)
{
buffer[x, y] = new Point(x, y);
}
}
// Fill Expected data:
for (int y = rectY; y < rect.Bottom; y++)
{
FillRow(y, expected);
}
// Fill actual data using IterateRows:
var settings = new ParallelExecutionSettings(maxDegreeOfParallelism, memoryAllocator);
void RowAction(RowInterval rows)
{
this.output.WriteLine(rows.ToString());
for (int y = rows.Min; y < rows.Max; y++)
{
FillRow(y, actual);
}
}
var operation = new TestRowIntervalOperation(RowAction);
ParallelRowIterator.IterateRowIntervals(
rect,
settings,
in operation);
// Assert:
TestImageExtensions.CompareBuffers(expected.GetSingleSpan(), actual.GetSingleSpan());
}
}
public void IterateRowsWithTempBufferRequiresValidRectangle(int width, int height)
{
var parallelSettings = default(ParallelExecutionSettings);
var rect = new Rectangle(0, 0, width, height);
void RowAction(RowInterval rows, Span <Rgba32> memory)
{
}
var operation = new TestRowIntervalOperation <Rgba32>(RowAction);
ArgumentOutOfRangeException ex = Assert.Throws <ArgumentOutOfRangeException>(
() => ParallelRowIterator.IterateRowIntervals <TestRowIntervalOperation <Rgba32>, Rgba32>(rect, in parallelSettings, in operation));
Assert.Contains(width <= 0 ? "Width" : "Height", ex.Message);
}
public void IterateRowsWithTempBuffer_WithEffectiveMinimumPixelsLimit(
int maxDegreeOfParallelism,
int minimumPixelsProcessedPerTask,
int width,
int height,
int expectedNumberOfSteps,
int expectedStepLength,
int expectedLastStepLength)
{
var parallelSettings = new ParallelExecutionSettings(
maxDegreeOfParallelism,
minimumPixelsProcessedPerTask,
Configuration.Default.MemoryAllocator);
var rectangle = new Rectangle(0, 0, width, height);
int actualNumberOfSteps = 0;
void RowAction(RowInterval rows, Span <Vector4> buffer)
{
Assert.True(rows.Min >= 0);
Assert.True(rows.Max <= height);
int step = rows.Max - rows.Min;
int expected = rows.Max < height ? expectedStepLength : expectedLastStepLength;
Interlocked.Increment(ref actualNumberOfSteps);
Assert.Equal(expected, step);
}
var operation = new TestRowIntervalOperation <Vector4>(RowAction);
ParallelRowIterator.IterateRowIntervals <TestRowIntervalOperation <Vector4>, Vector4>(
rectangle,
in parallelSettings,
in operation);
Assert.Equal(expectedNumberOfSteps, actualNumberOfSteps);
}
public void IterateRows_OverMinimumPixelsLimit_IntervalsAreCorrect(
int maxDegreeOfParallelism,
int minY,
int maxY,
int expectedStepLength,
int expectedLastStepLength,
int expectedNumberOfSteps)
{
var parallelSettings = new ParallelExecutionSettings(
maxDegreeOfParallelism,
1,
Configuration.Default.MemoryAllocator);
var rectangle = new Rectangle(0, minY, 10, maxY - minY);
int actualNumberOfSteps = 0;
void RowAction(RowInterval rows)
{
Assert.True(rows.Min >= minY);
Assert.True(rows.Max <= maxY);
int step = rows.Max - rows.Min;
int expected = rows.Max < maxY ? expectedStepLength : expectedLastStepLength;
Interlocked.Increment(ref actualNumberOfSteps);
Assert.Equal(expected, step);
}
var operation = new TestRowIntervalOperation(RowAction);
ParallelRowIterator.IterateRowIntervals(
rectangle,
in parallelSettings,
in operation);
Assert.Equal(expectedNumberOfSteps, actualNumberOfSteps);
}