///////////////////////////////////////////////////////////////////////////
/// <summary>
/// Returns the alpha value of the mask at the specified coordinates
/// </summary>
/// <param name="mask"></param>
/// <param name="x"></param>
/// <param name="y"></param>
/// <returns></returns>
private static int GetMaskValue(Layer.Mask mask, int x, int y)
{
int c = 255;
if (mask.PositionIsRelative)
{
x -= mask.Rect.X;
y -= mask.Rect.Y;
}
else
{
x = (x + mask.Layer.Rect.X) - mask.Rect.X;
y = (y + mask.Layer.Rect.Y) - mask.Rect.Y;
}
if (y >= 0 && y < mask.Rect.Height &&
x >= 0 && x < mask.Rect.Width)
{
int pos = y * mask.Rect.Width + x;
if (pos < mask.ImageData.Length)
{
c = mask.ImageData[pos];
}
else
{
c = 255;
}
}
return(c);
}
///////////////////////////////////////////////////////////////////////////
public static Bitmap DecodeImage(Layer.Mask mask)
{
if (mask.Rect.Width == 0 || mask.Rect.Height == 0)
{
return(null);
}
var bitmap = new Bitmap(mask.Rect.Width, mask.Rect.Height, PixelFormat.Format32bppArgb);
#if true // fix remove unsafeness (admittedly slower)
// TODO: fast mode
for (var y = 0; y < mask.Rect.Height; y++)
{
var rowIndex = y * mask.Rect.Width;
for (var x = 0; x < mask.Rect.Width; x++)
{
var pos = rowIndex + x;
var pixelColor = Color.FromArgb(mask.ImageData[pos], mask.ImageData[pos], mask.ImageData[pos]);
// TODO: why is alpha ignored
bitmap.SetPixel(x, y, Color.FromArgb(255, pixelColor));
}
}
#else
Layer layer = mask.Layer;
Rectangle r = new Rectangle(0, 0, bitmap.Width, bitmap.Height);
BitmapData bd = bitmap.LockBits(r, ImageLockMode.ReadWrite, bitmap.PixelFormat);
unsafe
{
byte *pCurrRowPixel = (byte *)bd.Scan0.ToPointer();
for (int y = 0; y < mask.Rect.Height; y++)
{
int rowIndex = y * mask.Rect.Width;
PixelData *pCurrPixel = (PixelData *)pCurrRowPixel;
for (int x = 0; x < mask.Rect.Width; x++)
{
int pos = rowIndex + x;
Color pixelColor = Color.FromArgb(mask.ImageData[pos], mask.ImageData[pos], mask.ImageData[pos]);
pCurrPixel->Alpha = 255;
pCurrPixel->Red = pixelColor.R;
pCurrPixel->Green = pixelColor.G;
pCurrPixel->Blue = pixelColor.B;
pCurrPixel += 1;
}
pCurrRowPixel += bd.Stride;
}
}
bitmap.UnlockBits(bd);
#endif
return(bitmap);
}
///////////////////////////////////////////////////////////////////////////
public static Bitmap DecodeImage(Layer.Mask mask)
{
Layer layer = mask.Layer;
if (mask.Rect.Width == 0 || mask.Rect.Height == 0)
{
return(null);
}
Bitmap bitmap = new Bitmap(mask.Rect.Width, mask.Rect.Height, PixelFormat.Format32bppArgb);
Rectangle r = new Rectangle(0, 0, bitmap.Width, bitmap.Height);
BitmapData bd = bitmap.LockBits(r, ImageLockMode.ReadWrite, bitmap.PixelFormat);
unsafe
{
byte *pCurrRowPixel = (byte *)bd.Scan0.ToPointer();
for (int y = 0; y < mask.Rect.Height; y++)
{
int rowIndex = y * mask.Rect.Width;
PixelData *pCurrPixel = (PixelData *)pCurrRowPixel;
for (int x = 0; x < mask.Rect.Width; x++)
{
int pos = rowIndex + x;
Color pixelColor = Color.FromArgb(mask.ImageData[pos], mask.ImageData[pos], mask.ImageData[pos]);
pCurrPixel->Alpha = 255;
pCurrPixel->Red = pixelColor.R;
pCurrPixel->Green = pixelColor.G;
pCurrPixel->Blue = pixelColor.B;
pCurrPixel += 1;
}
pCurrRowPixel += bd.Stride;
}
}
bitmap.UnlockBits(bd);
return(bitmap);
}
public LayerWrapper(Layer l)
{
colorMode = l.PsdFile.ColorMode;
hasalpha = l.SortedChannels.ContainsKey(-1);
hasmask = l.SortedChannels.ContainsKey(-2);
hasch0 = l.SortedChannels.ContainsKey(0);
hasch1 = l.SortedChannels.ContainsKey(1);
hasch2 = l.SortedChannels.ContainsKey(2);
hasch3 = l.SortedChannels.ContainsKey(3);
if (hasalpha) alphabytes = l.SortedChannels[-1].ImageData;
if (hasmask) mask = l.MaskData;
if (hasch0) ch0bytes = l.SortedChannels[0].ImageData;
if (hasch1) ch1bytes = l.SortedChannels[1].ImageData;
if (hasch2) ch2bytes = l.SortedChannels[2].ImageData;
if (hasch3) ch3bytes = l.SortedChannels[3].ImageData;
colorModeData = l.PsdFile.ColorModeData;
}