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public class LockImage
{
private Bitmap BaseImage;
private int BaseImageWidth;
private int BaseImageHeight;
private int TotalPixels;
private IntPtr ImageAddress;
private BitmapData ImageContent;
private int[] ImageBuffer;
//'comptage pixels
public int CountLeftPixels { get; set; }
public int CountRightPixels { get; set; }
public int TotalBlackPixels { get; set; } //rajouté
public Bitmap Image
{
// User access to the relevant image.
get { return BaseImage; }
set
{
Graphics canvas;
BaseImage = new Bitmap(value.Width, value.Height, value.PixelFormat);
canvas = Graphics.FromImage(BaseImage);
canvas.DrawImage(value, 0, 0, value.Width, value.Height);
canvas.Dispose();
}
}
private void LockTheImage()
{
// Lock the image in memory. How much room
// do we need?
BaseImageWidth = BaseImage.Width;
BaseImageHeight = BaseImage.Height;
TotalPixels = BaseImageWidth * BaseImageHeight;
//----- Create a stable (locked) area in memory. It
// will store 32-bit color images.
ImageBuffer = new int[TotalPixels];
ImageContent = BaseImage.LockBits(
new Rectangle(0, 0, BaseImageWidth, BaseImageHeight),
ImageLockMode.ReadWrite,
PixelFormat.Format32bppRgb);
ImageAddress = ImageContent.Scan0;
//----- Associate the buffer and the locked memory.
Marshal.Copy(ImageAddress, ImageBuffer, 0, TotalPixels);
}
private void UnlockTheImage()
{
// ----- Unlock the memory area.
Marshal.Copy(ImageBuffer, 0, ImageAddress, TotalPixels);
Image.UnlockBits(ImageContent);
ImageContent = null;
ImageBuffer = new int[0];
}
public void Colorize(AxisVertical axe, Color rightColor, Color leftColor)
{
int pixelIndex;
int onePixel;
int alphaPart;
int redPart;
int greenPart;
int bluePart;
//----- Lock the image for speed.
LockTheImage();
//----- Process each pixel in the grid.
for (int y = 0; y < BaseImageHeight; y++)
{
for (int x = 0; x < BaseImageWidth; x++)
{
// ----- Locate the pixel's color.
pixelIndex = y * BaseImageWidth + x;
onePixel = ImageBuffer[pixelIndex];
//----- Extract the color values.
alphaPart = (onePixel >> 24) & 0xFF;
redPart = (onePixel >> 16) & 0xFF;
greenPart = (onePixel >> 8) & 0xFF;
bluePart = onePixel & 0xFF;
//----- Get the general color intensity.
if (x <= axe.Point1.X)
{
CountLeftPixels++;
redPart = rightColor.R;
greenPart = rightColor.G;
bluePart = rightColor.B;
}
else if (x > axe.Point1.X)
{
CountRightPixels++;
redPart = leftColor.R;
greenPart = leftColor.G;
bluePart = leftColor.B;
}
// ----- Set the pixel to the new color. Retain
// the original alpha channel.
ImageBuffer[pixelIndex] = (alphaPart << 24) +
(redPart << 16) + (greenPart << 8) + bluePart;
}
}
//----- Finished. Unlock the image.
UnlockTheImage();
}
public void Symetrie(AxisVertical axe,Color black)
{
int pixelIndex;
int onePixel;
int alphaPart;
int redPart;
int greenPart;
int bluePart;
//----- Lock the image for speed.
LockTheImage();
TotalBlackPixels = 0;
for (int y = 0; y < BaseImageHeight; y++)
{
for (int x = 0; x < BaseImageWidth; x++)
{
// ----- Locate the pixel's color.
pixelIndex = y * BaseImageWidth + x;
onePixel = ImageBuffer[pixelIndex];
//----- Extract the color values.
alphaPart = (onePixel >> 24) & 0xFF;
redPart = (onePixel >> 16) & 0xFF;
greenPart = (onePixel >> 8) & 0xFF;
bluePart = onePixel & 0xFF;
//----- Get the general color intensity.
if (alphaPart == black.A
&& redPart == black.R
&& greenPart == black.G
&& bluePart == black.B)
{
TotalBlackPixels++;
}
}
}
CountLeftPixels = 0;
bool found = false;
//----- Process each pixel in the grid.
for (int x = 0; x < BaseImageWidth; x++)
{
for (int y = 0; y < BaseImageHeight; y++)
{
// ----- Locate the pixel's color.
pixelIndex = x * BaseImageHeight + y;
onePixel = ImageBuffer[pixelIndex];
//----- Extract the color values.
alphaPart = (onePixel >> 24) & 0xFF;
redPart = (onePixel >> 16) & 0xFF;
greenPart = (onePixel >> 8) & 0xFF;
bluePart = onePixel & 0xFF;
//----- Get the general color intensity.
if (alphaPart == black.A
&& redPart == black.R
&& greenPart == black.G
&& bluePart == black.B)
{
CountLeftPixels++;
if ( x == axe.Point1.X )
{
CountRightPixels = TotalBlackPixels - CountLeftPixels;
found = true;
}
}
// ----- Set the pixel to the new color. Retain
// the original alpha channel.
ImageBuffer[pixelIndex] = (alphaPart << 24) +
(redPart << 16) + (greenPart << 8) + bluePart;
if (found) break;
}
if (found) break;
}
//----- Finished. Unlock the image.
UnlockTheImage();
}
} |
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