/// <summary>
/// Creates a new GBA.Image from a sub-region of an existing image.
/// </summary>
public Image(Bitmap image, Rectangle region, Palette palette = null)
{
Load(region.Width, region.Height, new Palette(16));
int index = 0;
Color color;
int HI_nibble;
int LO_nibble;
if (palette == null)
{
for (int y = 0; y < region.Height; y++)
{
for (int x = 0; x < region.Width; x += 2)
{
color = image.GetColor(region.X + x, region.Y + y);
LO_nibble = Colors.Find(color);
if (LO_nibble == -1)
{
LO_nibble = Colors.Count;
Colors.Add(color);
}
color = image.GetColor(region.X + x + 1, region.Y + y);
HI_nibble = Colors.Find(color);
if (HI_nibble == -1)
{
HI_nibble = Colors.Count;
Colors.Add(color);
}
Bytes[index++] = (byte)((HI_nibble << 4) | LO_nibble);
}
}
}
else
{
for (int y = 0; y < region.Height; y++)
{
for (int x = 0; x < region.Width; x += 2)
{
color = image.GetColor(region.X + x + 1, region.Y + y);
HI_nibble = palette.Find(color);
color = image.GetColor(region.X + x, region.Y + y);
LO_nibble = palette.Find(color);
if (HI_nibble == -1 || LO_nibble == -1)
{
throw new Exception("A color in the image was not found in the given palette.\n" +
"At coordinates: x = " + (region.X + x) + ", y = " + (region.Y + y));
}
else
{
Bytes[index] = (byte)((HI_nibble << 4) | LO_nibble);
}
index++;
}
}
Colors = palette;
}
}
/// <summary>
/// Creates a GBA.Image from a GBA.Bitmap and the given GBA.Palette (set palette as null and it will generate a Palette)
/// If colors are found in the Bitmap from outside the given Palette, an error will be reported.
/// </summary>
public Image(Bitmap image, Palette palette = null)
{
Load(image.Width, image.Height, new Palette(16));
int index = 0;
Color color;
int HI_nibble;
int LO_nibble;
if (palette == null)
{
for (int y = 0; y < Height; y++)
{
for (int x = 0; x < Width; x += 2)
{
color = image.GetColor(x, y);
LO_nibble = Colors.Find(color);
if (LO_nibble == -1)
{
LO_nibble = Colors.Count;
Colors.Add(color);
}
color = image.GetColor(x + 1, y);
HI_nibble = Colors.Find(color);
if (HI_nibble == -1)
{
HI_nibble = Colors.Count;
Colors.Add(color);
}
Bytes[index++] = (byte)((HI_nibble << 4) | LO_nibble);
}
}
}
else
{
for (int y = 0; y < Height; y++)
{
for (int x = 0; x < Width; x += 2)
{
color = image.GetColor(x + 1, y);
HI_nibble = palette.Find(color);
color = image.GetColor(x, y);
LO_nibble = palette.Find(color);
if (HI_nibble == -1 || LO_nibble == -1)
{
throw new Exception("A color in the image was not found in the palette.");
}
else
{
Bytes[index] = (byte)((HI_nibble << 4) | LO_nibble);
}
index++;
}
}
Colors = palette;
}
}
