/// <summary>
/// Draw a frame around the buffer from (0,0) to (width, height)
/// </summary>
void DrawFrame(PixelsBuffer buffer, Cross.Drawing.Color color)
{
int idx = 0; //pixel index
//draw left, right lines
for (int y = 0; y < buffer.Height; y++)
{
//left
idx = buffer.StartOffset + buffer.Stride * y;// buffer.GetPixelIndex(0, y);
buffer.Data[idx] = color.Data;
//right
idx = buffer.StartOffset + buffer.Stride * y + buffer.Width - 1;// buffer.GetPixelIndex(buffer.Width - 1, y);
buffer.Data[idx] = color.Data;
}
//draw top, bottom lines
for (int x = 0; x < buffer.Width; x++)
{
//top
idx = buffer.StartOffset + x;// buffer.GetPixelIndex(x, 0);
buffer.Data[idx] = color.Data;
//bottom
idx = buffer.StartOffset + (buffer.Height - 1) * buffer.Stride + x;// buffer.GetPixelIndex(x, buffer.Height - 1);
buffer.Data[idx] = color.Data;
}
}
/// <summary>
/// Draw a diagonal line with the specified color from (0,0) to (width, height)
/// </summary>
void DrawLine(PixelsBuffer buffer, Cross.Drawing.Color color)
{
int idx = 0; //pixel index
for (int i = 0; i < buffer.Height; i++)
{
idx = buffer.StartOffset + i * buffer.Stride + i; // buffer.GetPixelIndex(i, i);
buffer.Data[idx] = color.Data;
}
}
/// <summary>
/// Create a new instance
/// <para>Note: This constructor does not check whether values are within correct range [0, 255]</para>
/// </summary>
public Color(Color source, int alpha)
{
Data = source.Data | (uint)(alpha << 24);
Precalculate();
}
/// <summary>
/// Create a new color from the original color but with different alpha
/// </summary>
/// <param name="orginal">The color to copy R, G, B component from</param>
/// <param name="alpha">The new alpha component. Range: [0, 2555]</param>
public static Color Create(Color orginal, byte alpha)
{
return new Color(orginal, alpha);
}