/// <summary>
/// Reads the 24 bit color palette from the stream
/// </summary>
/// <typeparam name="TPixel">The pixel format.</typeparam>
/// <param name="pixels">The <see cref="PixelAccessor{TPixel}"/> to assign the palette to.</param>
/// <param name="width">The width of the bitmap.</param>
/// <param name="height">The height of the bitmap.</param>
/// <param name="inverted">Whether the bitmap is inverted.</param>
private void ReadRgb24 <TPixel>(PixelAccessor <TPixel> pixels, int width, int height, bool inverted)
where TPixel : struct, IPixel <TPixel>
{
int padding = CalculatePadding(width, 3);
using (var row = new PixelArea <TPixel>(width, ComponentOrder.Zyx, padding))
{
for (int y = 0; y < height; y++)
{
row.Read(this.currentStream);
int newY = Invert(y, height, inverted);
pixels.CopyFrom(row, newY);
}
}
}
/// <summary>
/// Reads the 32 bit color palette from the stream
/// </summary>
/// <typeparam name="TColor">The pixel format.</typeparam>
/// <typeparam name="TPacked">The packed format. <example>uint, long, float.</example></typeparam>
/// <param name="pixels">The <see cref="PixelAccessor{TColor, TPacked}"/> to assign the palette to.</param>
/// <param name="width">The width of the bitmap.</param>
/// <param name="height">The height of the bitmap.</param>
/// <param name="inverted">Whether the bitmap is inverted.</param>
private void ReadRgb32 <TColor, TPacked>(PixelAccessor <TColor, TPacked> pixels, int width, int height, bool inverted)
where TColor : struct, IPackedPixel <TPacked>
where TPacked : struct
{
int padding = CalculatePadding(width, 4);
using (PixelArea <TColor, TPacked> row = new PixelArea <TColor, TPacked>(width, ComponentOrder.ZYXW, padding))
{
for (int y = 0; y < height; y++)
{
row.Read(this.currentStream);
int newY = Invert(y, height, inverted);
pixels.CopyFrom(row, newY);
}
}
}
/// <summary>
/// Reads the 16 bit color palette from the stream
/// </summary>
/// <typeparam name="TPixel">The pixel format.</typeparam>
/// <param name="pixels">The <see cref="PixelAccessor{TPixel}"/> to assign the palette to.</param>
/// <param name="width">The width of the bitmap.</param>
/// <param name="height">The height of the bitmap.</param>
/// <param name="inverted">Whether the bitmap is inverted.</param>
private void ReadRgb16 <TPixel>(PixelAccessor <TPixel> pixels, int width, int height, bool inverted)
where TPixel : struct, IPixel <TPixel>
{
// We divide here as we will store the colors in our floating point format.
const int ScaleR = 8; // 256/32
const int ScaleG = 4; // 256/64
const int ComponentCount = 2;
TPixel color = default(TPixel);
Rgba32 rgba = new Rgba32(0, 0, 0, 255);
using (PixelArea <TPixel> row = new PixelArea <TPixel>(width, ComponentOrder.Xyz))
{
for (int y = 0; y < height; y++)
{
row.Read(this.currentStream);
int newY = Invert(y, height, inverted);
Span <TPixel> pixelRow = pixels.GetRowSpan(newY);
int offset = 0;
for (int x = 0; x < width; x++)
{
short temp = BitConverter.ToInt16(row.Bytes, offset);
rgba.R = (byte)(((temp & Rgb16RMask) >> 11) * ScaleR);
rgba.G = (byte)(((temp & Rgb16GMask) >> 5) * ScaleG);
rgba.B = (byte)((temp & Rgb16BMask) * ScaleR);
color.PackFromRgba32(rgba);
pixelRow[x] = color;
offset += ComponentCount;
}
}
}
}
