private void CalculateDistance(ImageBuffer image)
{
var maxDist = (image.Height + image.Width) > 255 ? 255 : (image.Height + image.Width);
var buffer = image.GetBuffer();
// O(n^2) solution to find the Manhattan distance to "on" pixels in a two dimension array
// traverse from top left to bottom right
for (int y = 0; y < image.Height; y++)
{
var yOffset = image.GetBufferOffsetY(y);
for (int x = 0; x < image.Width; x++)
{
if (buffer[yOffset + x] == 0)
{
// first pass and pixel was off, it remains a zero
}
else
{
// pixel was on
// It is at most the sum of the lengths of the array
// away from a pixel that is off
buffer[yOffset + x] = (byte)maxDist;
// or one more than the pixel to the north
if (x > 0)
{
var value = Math.Min(buffer[yOffset + x], buffer[yOffset + x - 1] + 1);
buffer[yOffset + x] = (byte)value;
}
// or one more than the pixel to the west
if (y > 0)
{
var value = Math.Min(buffer[yOffset + x], buffer[yOffset - image.Width + x] + 1);
buffer[yOffset + x] = (byte)value;
}
}
}
}
// traverse from bottom right to top left
for (int y = image.Height - 1; y >= 0; y--)
{
var yOffset = image.GetBufferOffsetY(y);
for (int x = image.Width - 1; x >= 0; x--)
{
// either what we had on the first pass
// or one more than the pixel to the south
if (x + 1 < image.Width)
{
var value = Math.Min(buffer[yOffset + x], buffer[yOffset + x + 1] + 1);
buffer[yOffset + x] = (byte)value;
}
// or one more than the pixel to the east
if (y + 1 < image.Height)
{
var value = Math.Min(buffer[yOffset + x], buffer[yOffset + image.Width + x] + 1);
buffer[yOffset + x] = (byte)value;
}
}
}
}
public void CopyColorBufferToImage(ImageBuffer destImage, RectangleInt viewport)
{
if (destImage.BitDepth != 32)
{
throw new Exception("We can only render to 32 bit dest at the moment.");
}
Byte[] destBuffer = destImage.GetBuffer();
viewport.Bottom = Math.Max(0, Math.Min(destImage.Height, viewport.Bottom));
viewport.Top = Math.Max(0, Math.Min(destImage.Height, viewport.Top));
#if MULTI_THREAD
System.Threading.Tasks.Parallel.For(viewport.Bottom, viewport.Height, y => //
#else
for (int y = viewport.Bottom; y < viewport.Height; y++)
#endif
{
for (int x = viewport.Left; x < viewport.Right; x++)
{
int bufferOffset = destImage.GetBufferOffsetY(y);
// we don't need to set this if we are anti-aliased
int totalOffset = bufferOffset + x * 4;
destBuffer[totalOffset++] = (byte)colorBuffer[x][y].Blue0To255;
destBuffer[totalOffset++] = (byte)colorBuffer[x][y].Green0To255;
destBuffer[totalOffset++] = (byte)colorBuffer[x][y].Red0To255;
destBuffer[totalOffset] = (byte)colorBuffer[x][y].Alpha0To255;
}
}
public static ImageBuffer Multiply(this ImageBuffer sourceImage, RGBA_Bytes color)
{
var outputImage = new ImageBuffer(sourceImage);
switch (outputImage.BitDepth)
{
case 32:
int height = outputImage.Height;
int width = outputImage.Width;
byte[] imageABuffer = outputImage.GetBuffer();
for (int y = 0; y < height; y++)
{
int offsetA = outputImage.GetBufferOffsetY(y);
for (int x = 0; x < width; x++)
{
imageABuffer[offsetA + 0] = (byte)((imageABuffer[offsetA + 0] * color.blue) / 255);
imageABuffer[offsetA + 1] = (byte)((imageABuffer[offsetA + 1] * color.green) / 255);
imageABuffer[offsetA + 2] = (byte)((imageABuffer[offsetA + 2] * color.red) / 255);
imageABuffer[offsetA + 3] = (byte)((imageABuffer[offsetA + 3] * color.alpha) / 255);
offsetA += 4;
}
}
break;
default:
throw new NotImplementedException();
}
return(outputImage);
}
public MarchingSquaresByte(ImageBuffer imageToMarch, PositiveArea0to1 thresholdFunction, int debugColor)
{
thersholdPerPixel = new double[imageToMarch.Width * imageToMarch.Height];
{
byte[] buffer = imageToMarch.GetBuffer();
int strideInBytes = imageToMarch.StrideInBytes();
for (int y = 0; y < imageToMarch.Height; y++)
{
int imageBufferOffset = imageToMarch.GetBufferOffsetY(y);
int thresholdBufferOffset = y * imageToMarch.Width;
for (int x = 0; x < imageToMarch.Width; x++)
{
int imageBufferOffsetWithX = imageBufferOffset + x * 4;
thersholdPerPixel[thresholdBufferOffset + x] = thresholdFunction(GetRGBA(buffer, imageBufferOffsetWithX));
}
}
}
this.thresholdFunction = thresholdFunction;
this.imageToMarch = imageToMarch;
this.debugColor = debugColor;
CreateLineSegments();
}
public void CopyNoramlBufferToImage(ImageBuffer destImage, RectangleInt viewport)
{
if (destImage.BitDepth != 32)
{
throw new Exception("We can only render to 32 bit dest at the moment.");
}
byte[] destBuffer = destImage.GetBuffer();
viewport.Bottom = Math.Max(0, Math.Min(destImage.Height, viewport.Bottom));
viewport.Top = Math.Max(0, Math.Min(destImage.Height, viewport.Top));
for (int y = viewport.Bottom; y < viewport.Height; y++)
{
for (int x = viewport.Left; x < viewport.Right; x++)
{
int bufferOffset = destImage.GetBufferOffsetY(y);
// we don't need to set this if we are anti-aliased
int totalOffset = bufferOffset + x * 4;
destBuffer[totalOffset++] = (byte)((NormalBuffer[x][y].X + 1) * 128);
destBuffer[totalOffset++] = (byte)((NormalBuffer[x][y].Y + 1) * 128);
destBuffer[totalOffset++] = (byte)((NormalBuffer[x][y].Z + 1) * 128);
destBuffer[totalOffset] = 255;
}
}
destImage.MarkImageChanged();
}
internal static void DoXBlur(ImageBuffer sourceDest)
{
if (sourceDest.BitDepth != 8)
{
throw new NotImplementedException("We only work with 8 bit at the moment.");
}
int height = sourceDest.Height;
int width = sourceDest.Width;
byte[] buffer = sourceDest.GetBuffer();
byte[] cache = new byte[width];
for (int y = 0; y < height; y++)
{
int offset = sourceDest.GetBufferOffsetY(y);
for (int x = 0; x < width; x++)
{
cache[x] = buffer[offset + x];
}
for (int x = 1; x < width - 1; x++)
{
int newValue = (cache[x - 1] + cache[x] * 2 + cache[x + 1] + 2) / 4; // the + 2 is so that we will round correctly
buffer[offset + x] = (byte)newValue;
}
}
}
public void BuildHistogramFromImage(ImageBuffer image, ImageToPathObject3D_2.AnalysisTypes analysisType)
{
// build the histogram cache
var height = (int)(100 * GuiWidget.DeviceScale);
_histogramRawCache = new ImageBuffer(256, height);
var counts = new int[_histogramRawCache.Width];
IThresholdFunction function = new MapOnMaxIntensity(0, 1);
var bottom = 0;
if (analysisType == ImageToPathObject3D_2.AnalysisTypes.Colors)
{
function = new QuickHue();
bottom = (int)(10 * GuiWidget.DeviceScale);
}
byte[] buffer = image.GetBuffer();
for (int y = 0; y < image.Height; y++)
{
int imageBufferOffset = image.GetBufferOffsetY(y);
for (int x = 0; x < image.Width; x++)
{
int imageBufferOffsetWithX = imageBufferOffset + x * 4;
var color = GetRGBA(buffer, imageBufferOffsetWithX);
counts[(int)(function.Transform(color) * (_histogramRawCache.Width - 1))]++;
}
}
double max = counts.Select((value, index) => new { value, index })
.OrderByDescending(vi => vi.value)
.First().value;
var graphics = _histogramRawCache.NewGraphics2D();
var theme = ApplicationController.Instance.Theme;
graphics.Clear(theme.SlightShade);
var graphShape = new VertexStorage();
var graphHeight = height - bottom;
graphShape.MoveTo(0, bottom);
for (int i = 0; i < 256; i++)
{
graphShape.LineTo(i, bottom + Easing.Exponential.Out(counts[i] / max) * graphHeight);
// graphShape.LineTo(i, bottom + Easing.Cubic.Out(counts[i] / max) * graphHeight);
// graphShape.LineTo(i, bottom + Easing.Exponential.Out(counts[i] / max) * graphHeight);
// graphShape.LineTo(i, bottom + counts[i] / max * graphHeight);
}
graphShape.LineTo(256, bottom);
graphShape.LineTo(0, bottom);
graphics.Render(graphShape, 0, 0, theme.TextColor);
for (int i = 0; i < 256; i++)
{
var hue = ColorF.FromHSL(i / 255.0, 1, .49).ToColor();
graphics.Line(i, 0, i, bottom, hue);
}
}
public static ImageBuffer AnyAlphaToColor(this ImageBuffer sourceImage, Color color, Color transparency)
{
var outputImage = new ImageBuffer(sourceImage);
switch (outputImage.BitDepth)
{
case 32:
{
int height = outputImage.Height;
int width = outputImage.Width;
byte[] imageABuffer = outputImage.GetBuffer();
for (int y = 0; y < height; y++)
{
int offsetA = outputImage.GetBufferOffsetY(y);
for (int x = 0; x < width; x++)
{
int alpha = imageABuffer[offsetA + 3];
if (alpha > 0)
{
// Set semi-transparent colors
imageABuffer[offsetA + 0] = color.blue;
imageABuffer[offsetA + 1] = color.green;
imageABuffer[offsetA + 2] = color.red;
//imageABuffer[offsetA + 3] = (byte) (alpha == 255 ? 255 : 255 - alpha);
imageABuffer[offsetA + 3] = (byte)alpha;
}
else
{
// Set transparent colors
imageABuffer[offsetA + 0] = transparency.blue;
imageABuffer[offsetA + 1] = transparency.green;
imageABuffer[offsetA + 2] = transparency.red;
imageABuffer[offsetA + 3] = transparency.alpha;
}
offsetA += 4;
}
}
//outputImage.SetRecieveBlender(new BlenderPreMultBGRA());
}
break;
default:
throw new NotImplementedException();
}
return(outputImage);
}
public static void DoAllWhite(ImageBuffer result, ImageBuffer imageA)
{
if (imageA.BitDepth != result.BitDepth)
{
throw new NotImplementedException("All the images have to be the same bit depth.");
}
if (imageA.Width != result.Width || imageA.Height != result.Height)
{
throw new Exception("All images must be the same size.");
}
switch (imageA.BitDepth)
{
case 32:
{
int height = imageA.Height;
int width = imageA.Width;
byte[] resultBuffer = result.GetBuffer();
byte[] imageABuffer = imageA.GetBuffer();
for (int y = 0; y < height; y++)
{
int offsetA = imageA.GetBufferOffsetY(y);
int offsetResult = result.GetBufferOffsetY(y);
for (int x = 0; x < width; x++)
{
int alpha = imageABuffer[offsetA + 3];
if (alpha > 0)
{
resultBuffer[offsetResult++] = (byte)255; offsetA++;
resultBuffer[offsetResult++] = (byte)255; offsetA++;
resultBuffer[offsetResult++] = (byte)255; offsetA++;
resultBuffer[offsetResult++] = (byte)alpha; offsetA++;
}
else
{
resultBuffer[offsetResult++] = (byte)0; offsetA++;
resultBuffer[offsetResult++] = (byte)0; offsetA++;
resultBuffer[offsetResult++] = (byte)0; offsetA++;
resultBuffer[offsetResult++] = (byte)0; offsetA++;
}
}
}
result.SetRecieveBlender(new BlenderPreMultBGRA());
}
break;
default:
throw new NotImplementedException();
}
}
private void CopyColorXSpan(ImageBuffer destImage, RectangleInt viewport, int y, byte[] destBuffer)
{
for (int x = viewport.Left; x < viewport.Right; x++)
{
int bufferOffset = destImage.GetBufferOffsetY(y);
// we don't need to set this if we are anti-aliased
int totalOffset = bufferOffset + x * 4;
destBuffer[totalOffset++] = (byte)ColorBuffer[x][y].Blue0To255;
destBuffer[totalOffset++] = (byte)ColorBuffer[x][y].Green0To255;
destBuffer[totalOffset++] = (byte)ColorBuffer[x][y].Red0To255;
destBuffer[totalOffset] = (byte)ColorBuffer[x][y].Alpha0To255;
}
}
public static void DoSubtract(ImageBuffer result, ImageBuffer imageToSubtractFrom, ImageBuffer imageToSubtract)
{
if (lookupSubtractAndClamp == null)
{
CreateLookup();
}
if (imageToSubtractFrom.BitDepth != imageToSubtract.BitDepth || imageToSubtract.BitDepth != result.BitDepth)
{
throw new NotImplementedException("All the images have to be the same bit depth.");
}
if (imageToSubtractFrom.Width != imageToSubtract.Width || imageToSubtractFrom.Height != imageToSubtract.Height ||
imageToSubtractFrom.Width != result.Width || imageToSubtractFrom.Height != result.Height)
{
throw new Exception("All images must be the same size.");
}
switch (imageToSubtractFrom.BitDepth)
{
case 32:
{
int height = imageToSubtractFrom.Height;
int width = imageToSubtractFrom.Width;
byte[] resultBuffer = result.GetBuffer();
byte[] imageABuffer = imageToSubtractFrom.GetBuffer();
byte[] imageBBuffer = imageToSubtract.GetBuffer();
for (int y = 0; y < height; y++)
{
int offset = imageToSubtractFrom.GetBufferOffsetY(y);
for (int x = 0; x < width; x++)
{
resultBuffer[offset] = (byte)lookupSubtractAndClamp[imageABuffer[offset] - imageBBuffer[offset] + 255]; // add 255 to make sure not < 0
offset++;
resultBuffer[offset] = (byte)lookupSubtractAndClamp[imageABuffer[offset] - imageBBuffer[offset] + 255];
offset++;
resultBuffer[offset] = (byte)lookupSubtractAndClamp[imageABuffer[offset] - imageBBuffer[offset] + 255];
offset++;
resultBuffer[offset] = 255;
offset++;
}
}
}
break;
default:
throw new NotImplementedException();
}
}
public static void DoSetGrayToColor(ImageBuffer result, ImageBuffer imageA, Color color)
{
if (imageA.BitDepth != result.BitDepth)
{
throw new NotImplementedException("All the images have to be the same bit depth.");
}
if (imageA.Width != result.Width || imageA.Height != result.Height)
{
throw new Exception("All images must be the same size.");
}
switch (imageA.BitDepth)
{
case 32:
{
int height = imageA.Height;
int width = imageA.Width;
byte[] resultBuffer = result.GetBuffer();
byte[] imageABuffer = imageA.GetBuffer();
for (int y = 0; y < height; y++)
{
int offsetA = imageA.GetBufferOffsetY(y);
int offsetResult = result.GetBufferOffsetY(y);
for (int x = 0; x < width; x++)
{
imageA.GetPixel(x, y).ToColorF().GetHSL(out double _, out double s, out double _);
if (s < .01)
{
resultBuffer[offsetResult++] = (byte)(color.blue); offsetA++;
resultBuffer[offsetResult++] = (byte)(color.green); offsetA++;
resultBuffer[offsetResult++] = (byte)(color.red); offsetA++;
resultBuffer[offsetResult++] = imageABuffer[offsetA++];
}
else
{
offsetResult += 4;
offsetA += 4;
}
}
}
}
break;
default:
throw new NotImplementedException();
}
}
public static void DoThreshold(ImageBuffer result, ImageBuffer sourceImage, int threshold, TestThreshold testFunction)
{
if (sourceImage.BitDepth != result.BitDepth)
{
throw new NotImplementedException("All the images have to be the same bit depth.");
}
if (sourceImage.Width != result.Width || sourceImage.Height != result.Height)
{
throw new Exception("All images must be the same size.");
}
switch (sourceImage.BitDepth)
{
case 32:
{
int height = sourceImage.Height;
int width = sourceImage.Width;
byte[] resultBuffer = result.GetBuffer();
byte[] sourceBuffer = sourceImage.GetBuffer();
for (int y = 0; y < height; y++)
{
int offset = sourceImage.GetBufferOffsetY(y);
for (int x = 0; x < width; x++)
{
if (testFunction(sourceBuffer, offset, threshold))
{
resultBuffer[offset + 0] = (byte)255;
resultBuffer[offset + 1] = (byte)255;
resultBuffer[offset + 2] = (byte)255;
resultBuffer[offset + 3] = (byte)255;
}
else
{
resultBuffer[offset + 0] = (byte)0;
resultBuffer[offset + 1] = (byte)0;
resultBuffer[offset + 2] = (byte)0;
resultBuffer[offset + 3] = (byte)0;
}
offset += 4;
}
}
}
break;
default:
throw new NotImplementedException();
}
}
public static ImageBuffer ReplaceColor(this ImageBuffer sourceImage, Color existingColor, Color newColor, bool keepExistingAlpha = true)
{
var outputImage = new ImageBuffer(sourceImage);
switch (outputImage.BitDepth)
{
case 32:
{
int height = outputImage.Height;
int width = outputImage.Width;
byte[] imageABuffer = outputImage.GetBuffer();
for (int y = 0; y < height; y++)
{
int offsetA = outputImage.GetBufferOffsetY(y);
for (int x = 0; x < width; x++)
{
if (imageABuffer[offsetA + 0] == existingColor.blue &&
imageABuffer[offsetA + 1] == existingColor.green &&
imageABuffer[offsetA + 2] == existingColor.red &&
imageABuffer[offsetA + 3] == existingColor.alpha)
{
// Set transparent colors
imageABuffer[offsetA + 0] = newColor.blue;
imageABuffer[offsetA + 1] = newColor.green;
imageABuffer[offsetA + 2] = newColor.red;
if (!keepExistingAlpha)
{
imageABuffer[offsetA + 3] = newColor.alpha;
}
}
offsetA += 4;
}
}
outputImage.SetRecieveBlender(new BlenderPreMultBGRA());
}
break;
default:
throw new NotImplementedException();
}
return(outputImage);
}
public static ImageBuffer AllWhite(this ImageBuffer sourceImage)
{
var destImage = new ImageBuffer(sourceImage);
switch (destImage.BitDepth)
{
case 32:
{
int height = destImage.Height;
int width = destImage.Width;
byte[] resultBuffer = sourceImage.GetBuffer();
byte[] imageABuffer = destImage.GetBuffer();
for (int y = 0; y < height; y++)
{
int offsetA = destImage.GetBufferOffsetY(y);
int offsetResult = sourceImage.GetBufferOffsetY(y);
for (int x = 0; x < width; x++)
{
int alpha = imageABuffer[offsetA + 3];
if (alpha > 0)
{
resultBuffer[offsetResult++] = (byte)255; offsetA++;
resultBuffer[offsetResult++] = (byte)255; offsetA++;
resultBuffer[offsetResult++] = (byte)255; offsetA++;
resultBuffer[offsetResult++] = (byte)alpha; offsetA++;
}
else
{
resultBuffer[offsetResult++] = (byte)0; offsetA++;
resultBuffer[offsetResult++] = (byte)0; offsetA++;
resultBuffer[offsetResult++] = (byte)0; offsetA++;
resultBuffer[offsetResult++] = (byte)0; offsetA++;
}
}
}
destImage.SetRecieveBlender(new BlenderPreMultBGRA());
}
break;
default:
throw new NotImplementedException();
}
return(destImage);
}
private void CopyDepthXSpan(ImageBuffer destImage, RectangleInt viewport, int y, byte[] destBuffer, double minZ, double divisor)
{
for (int x = viewport.Left; x < viewport.Right; x++)
{
int bufferOffset = destImage.GetBufferOffsetY(y);
// we don't need to set this if we are anti-aliased
int totalOffset = bufferOffset + x * 4;
double depthXY = DepthBuffer[x][y];
double rangedDepth = (depthXY - minZ) / divisor;
double clampedDepth = Math.Max(0, Math.Min(255, rangedDepth * 255));
byte depthColor = (byte)clampedDepth;
destBuffer[totalOffset++] = depthColor;
destBuffer[totalOffset++] = depthColor;
destBuffer[totalOffset++] = depthColor;
destBuffer[totalOffset] = 255;
}
}
private bool ColorDetected(ImageBuffer sourceImage, out double hueDetected)
{
byte[] sourceBuffer = sourceImage.GetBuffer();
var min = new Vector3(double.MaxValue, double.MaxValue, double.MaxValue);
var max = new Vector3(double.MinValue, double.MinValue, double.MinValue);
var hueCount = new int[10];
var colorPixels = 0;
for (int y = 0; y < sourceImage.Height; y++)
{
int imageOffset = sourceImage.GetBufferOffsetY(y);
for (int x = 0; x < sourceImage.Width; x++)
{
int offset = imageOffset + x * 4;
var b = sourceBuffer[offset + 0];
var g = sourceBuffer[offset + 1];
var r = sourceBuffer[offset + 2];
var color = new ColorF(r / 255.0, g / 255.0, b / 255.0);
color.GetHSL(out double hue, out double saturation, out double lightness);
min = Vector3.ComponentMin(min, new Vector3(hue, saturation, lightness));
max = Vector3.ComponentMax(max, new Vector3(hue, saturation, lightness));
if (saturation > .4 && lightness > .1 && lightness < .9)
{
hueCount[(int)(hue * 9)]++;
colorPixels++;
}
}
}
if (colorPixels / (double)(sourceImage.Width * sourceImage.Height) > .1)
{
var indexAtMax = hueCount.ToList().IndexOf(hueCount.Max());
hueDetected = indexAtMax / 10.0;
return(true);
}
hueDetected = 0;
return(false);
}
private void RebuildColorToAlphaImage(ImageBuffer sourceImage, ImageBuffer alphaImage, ImageBuffer displayImage)
{
if (sourceImage == null)
{
return;
}
// build the alpha image
if (alphaImage == null)
{
alphaImage = new ImageBuffer(sourceImage.Width, sourceImage.Height);
}
else if (alphaImage.Width != sourceImage.Width ||
alphaImage.Height != sourceImage.Height)
{
alphaImage.Allocate(sourceImage.Width, sourceImage.Height, sourceImage.BitDepth, sourceImage.GetRecieveBlender());
}
byte[] sourceBuffer = sourceImage.GetBuffer();
byte[] destBuffer = alphaImage.GetBuffer();
Parallel.For(0, sourceImage.Height, (y) =>
//for(int y = 0; y < sourceImage.Height; y++)
{
int imageOffset = sourceImage.GetBufferOffsetY(y);
for (int x = 0; x < sourceImage.Width; x++)
{
int imageBufferOffsetWithX = imageOffset + x * 4;
var b = sourceBuffer[imageBufferOffsetWithX + 0];
var g = sourceBuffer[imageBufferOffsetWithX + 1];
var r = sourceBuffer[imageBufferOffsetWithX + 2];
destBuffer[imageBufferOffsetWithX + 0] = b;
destBuffer[imageBufferOffsetWithX + 1] = g;
destBuffer[imageBufferOffsetWithX + 2] = r;
destBuffer[imageBufferOffsetWithX + 3] = GetAlphaFromHue(r, g, b, RangeStart, RangeEnd);
}
//}
});
alphaImage.MarkImageChanged();
displayImage.CopyFrom(alphaImage);
}
public static void DoInvertLightness(ImageBuffer result, ImageBuffer sourceImage)
{
if (sourceImage.BitDepth != result.BitDepth)
{
throw new NotImplementedException("All the images have to be the same bit depth.");
}
if (sourceImage.Width != result.Width || sourceImage.Height != result.Height)
{
throw new Exception("All images must be the same size.");
}
switch (sourceImage.BitDepth)
{
case 32:
{
int height = sourceImage.Height;
int width = sourceImage.Width;
byte[] resultBuffer = result.GetBuffer();
byte[] sourceBuffer = sourceImage.GetBuffer();
for (int y = 0; y < height; y++)
{
int offset = sourceImage.GetBufferOffsetY(y);
for (int x = 0; x < width; x++)
{
RGBA_Bytes color = new RGBA_Bytes(resultBuffer[offset + 2], resultBuffer[offset + 1], resultBuffer[offset + 0], resultBuffer[offset + 3]);
RGBA_Bytes invertedColor = InvertColor(color);
resultBuffer[offset + 0] = invertedColor.blue;
resultBuffer[offset + 1] = invertedColor.green;
resultBuffer[offset + 2] = invertedColor.blue;
resultBuffer[offset + 3] = invertedColor.alpha;
offset += 4;
}
}
}
break;
default:
throw new NotImplementedException();
}
}
public static void DoMultiply(ImageBuffer result, ImageBuffer imageA, ImageBuffer imageB)
{
if (imageA.BitDepth != imageB.BitDepth || imageB.BitDepth != result.BitDepth)
{
throw new NotImplementedException("All the images have to be the same bit depth.");
}
if (imageA.Width != imageB.Width || imageA.Height != imageB.Height ||
imageA.Width != result.Width || imageA.Height != result.Height)
{
throw new Exception("All images must be the same size.");
}
switch (imageA.BitDepth)
{
case 32:
{
int height = imageA.Height;
int width = imageA.Width;
byte[] resultBuffer = result.GetBuffer();
byte[] imageABuffer = imageA.GetBuffer();
byte[] imageBBuffer = imageB.GetBuffer();
for (int y = 0; y < height; y++)
{
int offsetA = imageA.GetBufferOffsetY(y);
int offsetB = imageB.GetBufferOffsetY(y);
int offsetResult = result.GetBufferOffsetY(y);
for (int x = 0; x < width; x++)
{
resultBuffer[offsetResult++] = (byte)((imageABuffer[offsetA++] * imageBBuffer[offsetB++]) / 255);
resultBuffer[offsetResult++] = (byte)((imageABuffer[offsetA++] * imageBBuffer[offsetB++]) / 255);
resultBuffer[offsetResult++] = (byte)((imageABuffer[offsetA++] * imageBBuffer[offsetB++]) / 255);
resultBuffer[offsetResult++] = 255; offsetA++; offsetB++;
}
}
}
break;
default:
throw new NotImplementedException();
}
}
public static void DoWhiteToColor(ImageBuffer result, ImageBuffer imageA, RGBA_Bytes color)
{
if (imageA.BitDepth != result.BitDepth)
{
throw new NotImplementedException("All the images have to be the same bit depth.");
}
if (imageA.Width != result.Width || imageA.Height != result.Height)
{
throw new Exception("All images must be the same size.");
}
switch (imageA.BitDepth)
{
case 32:
{
int height = imageA.Height;
int width = imageA.Width;
byte[] resultBuffer = result.GetBuffer();
byte[] imageABuffer = imageA.GetBuffer();
for (int y = 0; y < height; y++)
{
int offsetA = imageA.GetBufferOffsetY(y);
int offsetResult = result.GetBufferOffsetY(y);
byte amoutOfWhite = imageABuffer[offsetA];
for (int x = 0; x < width; x++)
{
resultBuffer[offsetResult++] = (byte)(color.blue * amoutOfWhite / 255); offsetA++;
resultBuffer[offsetResult++] = (byte)(color.green * amoutOfWhite / 255); offsetA++;
resultBuffer[offsetResult++] = (byte)(color.red * amoutOfWhite / 255); offsetA++;
resultBuffer[offsetResult++] = imageABuffer[offsetA++];
}
}
}
break;
default:
throw new NotImplementedException();
}
}
public static ImageBuffer AjustAlpha(this ImageBuffer sourceImage, double factor)
{
var outputImage = new ImageBuffer(sourceImage);
switch (outputImage.BitDepth)
{
case 32:
{
int height = outputImage.Height;
int width = outputImage.Width;
byte[] imageABuffer = outputImage.GetBuffer();
for (int y = 0; y < height; y++)
{
int offsetA = outputImage.GetBufferOffsetY(y);
for (int x = 0; x < width; x++)
{
var alpha = imageABuffer[offsetA + 3];
if (alpha > 0)
{
imageABuffer[offsetA + 3] = (byte)(alpha * factor);
}
offsetA += 4;
}
}
outputImage.SetRecieveBlender(new BlenderPreMultBGRA());
}
break;
default:
throw new NotImplementedException();
}
return(outputImage);
}
private void Paint(ImageBuffer dest, ImageBuffer source, int level)
{
int height = source.Height;
int width = source.Width;
int sourceStrideInBytes = source.StrideInBytes();
int destStrideInBytes = dest.StrideInBytes();
byte[] sourceBuffer = source.GetBuffer();
byte[] destBuffer = dest.GetBuffer();
for (int y = 1; y < height - 1; y++)
{
int offset = source.GetBufferOffsetY(y);
for (int x = 1; x < width - 1; x++)
{
if (destBuffer[offset] == 255 && // the dest is white
sourceBuffer[offset] == 0) // the dest is cleared
{
destBuffer[offset] = (byte)level;
}
offset++;
}
}
}
public MarchingSquaresByte(ImageBuffer sourceImage, Color edgeColor, Func <Color, double> thresholdFunction, int debugColor)
{
// expand the image so we have a border around it (in case it goes to the edge)
var imageToMarch = new ImageBuffer(sourceImage.Width + 2, sourceImage.Height + 2);
imageToMarch.SetRecieveBlender(new BlenderBGRAExactCopy());
var graphics2D = imageToMarch.NewGraphics2D();
graphics2D.Clear(edgeColor);
graphics2D.Render(sourceImage, 1, 1);
thersholdPerPixel = new double[imageToMarch.Width * imageToMarch.Height];
{
byte[] buffer = imageToMarch.GetBuffer();
int strideInBytes = imageToMarch.StrideInBytes();
for (int y = 0; y < imageToMarch.Height; y++)
{
int imageBufferOffset = imageToMarch.GetBufferOffsetY(y);
int thresholdBufferOffset = y * imageToMarch.Width;
for (int x = 0; x < imageToMarch.Width; x++)
{
int imageBufferOffsetWithX = imageBufferOffset + x * 4;
var color = GetRGBA(buffer, imageBufferOffsetWithX);
var thresholdValue = thresholdFunction(color);
thersholdPerPixel[thresholdBufferOffset + x] = thresholdValue;
}
}
}
this.ThresholdFunction = thresholdFunction;
this.imageToMarch = imageToMarch;
this.debugColor = debugColor;
CreateLineSegments();
}
private static void Copy8BitDataToImage(ImageBuffer destImage, Bitmap bitmap)
{
destImage.Allocate(bitmap.Width, bitmap.Height, bitmap.Width * 4, 32);
if (destImage.GetRecieveBlender() == null)
{
destImage.SetRecieveBlender(new BlenderBGRA());
}
BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), System.Drawing.Imaging.ImageLockMode.ReadWrite, bitmap.PixelFormat);
int sourceIndex = 0;
int destIndex = 0;
unsafe
{
byte[] destBuffer = destImage.GetBuffer(out int offset);
byte * pSourceBuffer = (byte *)bitmapData.Scan0;
System.Drawing.Color[] colors = bitmap.Palette.Entries;
for (int y = 0; y < destImage.Height; y++)
{
sourceIndex = y * bitmapData.Stride;
destIndex = destImage.GetBufferOffsetY(destImage.Height - 1 - y);
for (int x = 0; x < destImage.Width; x++)
{
System.Drawing.Color color = colors[pSourceBuffer[sourceIndex++]];
destBuffer[destIndex++] = color.B;
destBuffer[destIndex++] = color.G;
destBuffer[destIndex++] = color.R;
destBuffer[destIndex++] = color.A;
}
}
}
bitmap.UnlockBits(bitmapData);
}
private void RebuildIntensityToAlphaImage(ImageBuffer sourceImage, ImageBuffer alphaImage, ImageBuffer displayImage)
{
if (sourceImage == null)
{
return;
}
// build the alpha image
if (alphaImage.Width != sourceImage.Width ||
alphaImage.Height != sourceImage.Height)
{
alphaImage.Allocate(sourceImage.Width, sourceImage.Height, sourceImage.BitDepth, sourceImage.GetRecieveBlender());
displayImage.Allocate(sourceImage.Width, sourceImage.Height, sourceImage.BitDepth, sourceImage.GetRecieveBlender());
}
var startInt = (int)(RangeStart * 255);
var endInt = (int)(RangeEnd * 255);
var rangeInt = (int)Math.Max(1, (RangeEnd - RangeStart) * 255);
byte GetAlphaFromIntensity(byte r, byte g, byte b)
{
// return (color.Red0To1 * 0.2989) + (color.Green0To1 * 0.1140) + (color.Blue0To1 * 0.5870);
var alpha = (r * 76 + g * 29 + b * 150) / 255;
if (alpha < startInt)
{
return(0);
}
else if (alpha > endInt)
{
return(0);
}
else
{
if (rangeInt > 64)
{
var s1 = 255 - Math.Min(255, ((alpha - startInt) * 255 / rangeInt));
return((byte)s1);
}
return(255);
}
}
byte[] sourceBuffer = sourceImage.GetBuffer();
byte[] destBuffer = alphaImage.GetBuffer();
Parallel.For(0, sourceImage.Height, (y) =>
{
int imageOffset = sourceImage.GetBufferOffsetY(y);
for (int x = 0; x < sourceImage.Width; x++)
{
int imageBufferOffsetWithX = imageOffset + x * 4;
var b = sourceBuffer[imageBufferOffsetWithX + 0];
var g = sourceBuffer[imageBufferOffsetWithX + 1];
var r = sourceBuffer[imageBufferOffsetWithX + 2];
var a = sourceBuffer[imageBufferOffsetWithX + 3];
destBuffer[imageBufferOffsetWithX + 0] = b;
destBuffer[imageBufferOffsetWithX + 1] = g;
destBuffer[imageBufferOffsetWithX + 2] = r;
destBuffer[imageBufferOffsetWithX + 3] = (byte)(GetAlphaFromIntensity(r, g, b) * a / 255);
}
});
alphaImage.MarkImageChanged();
byte[] displayBuffer = displayImage.GetBuffer();
Parallel.For(0, sourceImage.Height, (y) =>
{
int imageOffset = displayImage.GetBufferOffsetY(y);
for (int x = 0; x < displayImage.Width; x++)
{
int imageBufferOffsetWithX = imageOffset + x * 4;
displayBuffer[imageBufferOffsetWithX + 0] = destBuffer[imageBufferOffsetWithX + 0];
displayBuffer[imageBufferOffsetWithX + 1] = destBuffer[imageBufferOffsetWithX + 1];
displayBuffer[imageBufferOffsetWithX + 2] = destBuffer[imageBufferOffsetWithX + 2];
if (destBuffer[imageBufferOffsetWithX + 3] > 1)
{
displayBuffer[imageBufferOffsetWithX + 3] = 255;
}
else
{
displayBuffer[imageBufferOffsetWithX + 3] = 0;
}
}
});
displayImage.MarkImageChanged();
}
void FindSubPixelPositions(ImageBuffer imageBuffer)
{
// find the subpixel center
int imageWidth = imageBuffer.Width;
int imageHeight = imageBuffer.Height;
byte[] buffer = imageBuffer.GetBuffer();
foreach (ValidResponseData validResponse in validResponsesBotomToTopList)
{
Vector2 position = validResponse.position;
int centerXInt = (int)(position.x + .5);
int centerYInt = (int)(position.y + .5);
int min = int.MaxValue;
int max = int.MinValue;
{
for (int y = centerYInt - 5; y <= centerYInt + 5; y++)
{
int byteOffset = imageBuffer.GetBufferOffsetY(y);
ValidResponseData[] totalResponseRow = allResponsesGrid.GetRow(y);
for (int x = centerXInt - 5; x <= centerXInt + 5; x++)
{
int intensity = buffer[byteOffset + x];
if (intensity < min)
{
min = intensity;
}
if (intensity > max)
{
max = intensity;
}
}
}
}
double center = (max - min) / 2 + min;
double maxRange = (max - min) / 4;
{
double weight = 0;
Vector2 accumulatedPosition = Vector2.Zero;
for (int y = centerYInt - 5; y <= centerYInt + 5; y++)
{
int byteOffset = imageBuffer.GetBufferOffsetY(y);
ValidResponseData[] totalResponseRow = allResponsesGrid.GetRow(y);
for (int x = centerXInt - 5; x <= centerXInt + 5; x++)
{
int value = buffer[byteOffset + x];
double absDeltaFromCenter = Math.Abs(value - center);
double contribution = 1 - (absDeltaFromCenter / maxRange);
contribution = Math.Max(0, Math.Min(1, contribution));
double distScalling = Math.Min(1, Math.Max(0, 1 - ((new Vector2(x, y) - position).Length - 3) / 2));
contribution *= distScalling;
weight += contribution;
accumulatedPosition += new Vector2(x, y) * contribution;
#if SHOW_SUB_PIXEL_LOGIC
if (i == 4)
{
buffer[byteOffset + x] = (byte)(contribution * 255);
}
#endif
}
}
validResponse.position = accumulatedPosition / weight;
}
}
}
public static void DoErode3x3Binary(ImageBuffer source, ImageBuffer dest, int threshold)
{
if (source.Width != dest.Width ||
source.Height != dest.Height ||
source.StrideInBytes() != dest.StrideInBytes())
{
throw new NotImplementedException("Source and Dest have to be the same size");
}
switch (source.BitDepth)
{
case 8:
{
int height = source.Height;
int width = source.Width;
int strideInBytes = source.StrideInBytes();
byte[] sourceBuffer = source.GetBuffer();
byte[] destBuffer = dest.GetBuffer();
System.Threading.Tasks.Parallel.For(1, height, y =>
//for (int y = 1; y < height - 1; y++)
{
int rowOffset = source.GetBufferOffsetY(y);
for (int x = 1; x < width - 1; x++)
{
int bufferOffset = rowOffset + x;
// make sure it is set to 1 if we don't change it to 0
destBuffer[bufferOffset] = 255;
// do the upper left
int checkOffset = bufferOffset - strideInBytes - 1;
if (sourceBuffer[checkOffset] < threshold)
{
destBuffer[bufferOffset] = 0;
continue;
}
// do the upper center
checkOffset = bufferOffset - strideInBytes + 0;
if (sourceBuffer[checkOffset] < threshold)
{
destBuffer[bufferOffset] = 0;
continue;
}
// do the upper right
checkOffset = bufferOffset - strideInBytes + 1;
if (sourceBuffer[checkOffset] < threshold)
{
destBuffer[bufferOffset] = 0;
continue;
}
// do the center left
checkOffset = bufferOffset + strideInBytes - 1;
if (sourceBuffer[checkOffset] < threshold)
{
destBuffer[bufferOffset] = 0;
continue;
}
// do the center center
checkOffset = bufferOffset + strideInBytes + 0;
if (sourceBuffer[checkOffset] < threshold)
{
destBuffer[bufferOffset] = 0;
continue;
}
// do the lower right
checkOffset = bufferOffset + strideInBytes + 1;
if (sourceBuffer[checkOffset] < threshold)
{
destBuffer[bufferOffset] = 0;
continue;
}
// do the lower left
checkOffset = bufferOffset + strideInBytes - 1;
if (sourceBuffer[checkOffset] < threshold)
{
destBuffer[bufferOffset] = 0;
continue;
}
// do the lower center
checkOffset = bufferOffset + strideInBytes + 0;
if (sourceBuffer[checkOffset] < threshold)
{
destBuffer[bufferOffset] = 0;
continue;
}
// do the lower right
checkOffset = bufferOffset + strideInBytes + 1;
if (sourceBuffer[checkOffset] < threshold)
{
destBuffer[bufferOffset] = 0;
continue;
}
}
});
}
break;
case 32:
{
int height = source.Height;
int width = source.Width;
int sourceStrideInBytes = source.StrideInBytes();
int destStrideInBytes = dest.StrideInBytes();
byte[] sourceBuffer = source.GetBuffer();
byte[] destBuffer = dest.GetBuffer();
for (int destY = 1; destY < height - 1; destY++)
{
for (int destX = 1; destX < width - 1; destX++)
{
for (int sourceY = -1; sourceY <= 1; sourceY++)
{
for (int sourceX = -1; sourceX <= 1; sourceX++)
{
int sourceOffset = source.GetBufferOffsetXY(destX + sourceX, destY + sourceY);
if (sourceBuffer[sourceOffset] < threshold)
{
int destOffset = dest.GetBufferOffsetXY(destX, destY);
destBuffer[destOffset++] = 0;
destBuffer[destOffset++] = 0;
destBuffer[destOffset++] = 0;
destBuffer[destOffset++] = 255;
}
}
}
}
}
}
break;
default:
throw new NotImplementedException();
}
}
public void RayTraceScene(ImageBuffer destImage, RectangleInt viewport, Scene scene)
{
int maxsamples = (int)AntiAliasing;
//graphics2D.FillRectangle(viewport, RGBA_Floats.Black);
if (imageBufferAsDoubles == null || imageBufferAsDoubles.Length < viewport.Width || imageBufferAsDoubles[0].Length < viewport.Height)
{
imageBufferAsDoubles = new RGBA_Floats[viewport.Width][];
for (int i = 0; i < viewport.Width; i++)
{
imageBufferAsDoubles[i] = new RGBA_Floats[viewport.Height];
}
}
if (destImage.BitDepth != 32)
{
throw new Exception("We can only render to 32 bit dest at the moment.");
}
Byte[] destBuffer = destImage.GetBuffer();
viewport.Bottom = Math.Max(0, Math.Min(destImage.Height, viewport.Bottom));
viewport.Top = Math.Max(0, Math.Min(destImage.Height, viewport.Top));
#if MULTI_THREAD
System.Threading.Tasks.Parallel.For(viewport.Bottom, viewport.Height, y => //
#else
for (int y = viewport.Bottom; y < viewport.Height; y++)
#endif
{
for (int x = viewport.Left; x < viewport.Right; x++)
{
if (traceWithRayBundles)
{
int width = Math.Min(8, viewport.Right - x);
int height = Math.Min(8, viewport.Top - y);
FrustumRayBundle rayBundle = new FrustumRayBundle(width * height);
IntersectInfo[] intersectionsForBundle = new IntersectInfo[width * height];
for (int rayY = 0; rayY < height; rayY++)
{
for (int rayX = 0; rayX < width; rayX++)
{
rayBundle.rayArray[rayX + rayY * width] = scene.camera.GetRay(x + rayX, y + rayY);
intersectionsForBundle[rayX + rayY * width] = new IntersectInfo();
}
}
rayBundle.CalculateFrustum(width, height, scene.camera.Origin);
FullyTraceRayBundle(rayBundle, intersectionsForBundle, scene);
for (int rayY = 0; rayY < height; rayY++)
{
int bufferOffset = destImage.GetBufferOffsetY(y + rayY);
for (int rayX = 0; rayX < width; rayX++)
{
imageBufferAsDoubles[x + rayX][y + rayY] = intersectionsForBundle[rayX + rayY * width].totalColor;
if (AntiAliasing == AntiAliasing.None)
{
// we don't need to set this if we are anti-aliased
int totalOffset = bufferOffset + (x + rayX) * 4;
destBuffer[totalOffset++] = (byte)imageBufferAsDoubles[x + rayX][y + rayY].Blue0To255;
destBuffer[totalOffset++] = (byte)imageBufferAsDoubles[x + rayX][y + rayY].Green0To255;
destBuffer[totalOffset++] = (byte)imageBufferAsDoubles[x + rayX][y + rayY].Red0To255;
destBuffer[totalOffset] = 255;
}
}
}
x += width - 1; // skip all the pixels we bundled
y += height - 1; // skip all the pixels we bundled
}
else
{
int bufferOffset = destImage.GetBufferOffsetY(y);
Ray ray = scene.camera.GetRay(x, y);
imageBufferAsDoubles[x][y] = FullyTraceRay(ray, scene);
// we don't need to set this if we are anti-aliased
int totalOffset = bufferOffset + x * 4;
destBuffer[totalOffset++] = (byte)imageBufferAsDoubles[x][y].Blue0To255;
destBuffer[totalOffset++] = (byte)imageBufferAsDoubles[x][y].Green0To255;
destBuffer[totalOffset++] = (byte)imageBufferAsDoubles[x][y].Red0To255;
destBuffer[totalOffset] = 255;
}
}
}
