// Load bitmap data into a frame.
public static void LoadBitmapData(Stream stream, Frame frame, bool mask, bool reverse)
{
byte[] data;
int stride;
int line;
// Get the buffer and stride for the frame.
if (!mask)
{
data = frame.Data;
stride = frame.Stride;
}
else
{
frame.AddMask();
data = frame.Mask;
stride = frame.MaskStride;
}
// BMP images are usuallystored upside down in the stream.
if (reverse)
{
for (line = frame.Height - 1; line >= 0; --line)
{
stream.Read(data, line * stride, stride);
}
}
else
{
for (line = 0; line < frame.Height; line++)
{
stream.Read(data, line * stride, stride);
}
}
}
public static void Copy(Frame dest, int x, int y, int width, int height, Frame source, int sourceX, int sourceY)
{
// Developers should be aware of any costly conversions.
// So we don't automatically match the depths.
if (source.pixelFormat != dest.pixelFormat)
{
throw new InvalidOperationException();
}
if (x < 0 || y < 0 || width <= 0 || height <= 0)
{
throw new ArgumentOutOfRangeException();
}
if (x + width > dest.width)
{
width = dest.width - x;
}
if (y + height > dest.height)
{
height = dest.height - x;
}
if (source.width - sourceX < width)
{
width = source.width - sourceX;
}
if (source.height - sourceY < height)
{
height = source.height - sourceY;
}
//TODO:
// If we are copying an index bitmap, we need to find the color
// in the destination palette that is closest to the color we are
// copying to. We would also need to add colors to the palette,
// if there is space and optionally optimize the palette.
// For now we just overwrite the old palette.
if (source.palette != null)
{
dest.palette = (int[])source.palette.Clone();
}
int bits = Utils.FormatToBitCount(source.pixelFormat);
Copy(bits, dest.data, dest.stride, x, y, width, height, source.Data, source.stride, sourceX, sourceY);
//TODO:
// The mask is not taken into account when copying. We need to
// look at adding alpha support.
// For now, just copy over the mask.
if (source.Mask != null)
{
dest.AddMask();
Copy(1, dest.mask, dest.maskStride, x, y, width, height, source.mask, source.maskStride, sourceX, sourceY);
}
}
// Save the bitmap data in a frame.
public static void SaveBitmapData(Stream stream, Frame frame,
bool mask, bool inverted)
{
byte[] data;
int stride;
int line, column;
// Get the buffer and stride for the frame.
if (!mask)
{
data = frame.Data;
stride = frame.Stride;
}
else
{
frame.AddMask();
data = frame.Mask;
stride = frame.MaskStride;
}
// BMP images are stored upside down in the stream.
if (!inverted)
{
for (line = frame.Height - 1; line >= 0; --line)
{
stream.Write(data, line * stride, stride);
}
}
else
{
for (line = frame.Height - 1; line >= 0; --line)
{
for (column = 0; column < stride; ++column)
{
stream.WriteByte
((byte)(data[line * stride + column] ^ 0xFF));
}
}
}
}
public static void Copy(Frame dest, int x, int y, int width, int height, Frame source, int sourceX, int sourceY)
{
// Developers should be aware of any costly conversions.
// So we don't automatically match the depths.
if (source.pixelFormat != dest.pixelFormat)
{
throw new InvalidOperationException();
}
if (x < 0 || y < 0 || width <= 0 || height <= 0)
{
throw new ArgumentOutOfRangeException();
}
if (x + width > dest.width)
{
width = dest.width - x;
}
if (y + height > dest.height)
{
height = dest.height - x;
}
if (source.width - sourceX < width)
{
width = source.width - sourceX;
}
if (source.height - sourceY < height)
{
height = source.height - sourceY;
}
//TODO:
// If we are copying an index bitmap, we need to find the color
// in the destination palette that is closest to the color we are
// copying to. We would also need to add colors to the palette,
// if there is space and optionally optimize the palette.
// For now we just overwrite the old palette.
if (source.palette != null)
{
dest.palette = (int[])source.palette.Clone();
}
int bits = Utils.FormatToBitCount(source.pixelFormat);
Copy (bits, dest.data, dest.stride, x, y, width, height, source.Data, source.stride, sourceX, sourceY);
//TODO:
// The mask is not taken into account when copying. We need to
// look at adding alpha support.
// For now, just copy over the mask.
if (source.Mask != null)
{
dest.AddMask();
Copy(1, dest.mask, dest.maskStride, x, y, width, height, source.mask, source.maskStride, sourceX, sourceY);
}
}
// Save the bitmap data in a frame.
public static void SaveBitmapData(Stream stream, Frame frame,
bool mask, bool inverted)
{
byte[] data;
int stride;
int line, column;
// Get the buffer and stride for the frame.
if(!mask)
{
data = frame.Data;
stride = frame.Stride;
}
else
{
frame.AddMask();
data = frame.Mask;
stride = frame.MaskStride;
}
// BMP images are stored upside down in the stream.
if(!inverted)
{
for(line = frame.Height - 1; line >= 0; --line)
{
stream.Write(data, line * stride, stride);
}
}
else
{
for(line = frame.Height - 1; line >= 0; --line)
{
for(column = 0; column < stride; ++column)
{
stream.WriteByte
((byte)(data[line * stride + column] ^ 0xFF));
}
}
}
}
// Load bitmap data into a frame.
public static void LoadBitmapData(Stream stream, Frame frame, bool mask, bool reverse)
{
byte[] data;
int stride;
int line;
// Get the buffer and stride for the frame.
if(!mask)
{
data = frame.Data;
stride = frame.Stride;
}
else
{
frame.AddMask();
data = frame.Mask;
stride = frame.MaskStride;
}
// BMP images are usuallystored upside down in the stream.
if (reverse)
{
for(line = frame.Height - 1; line >= 0; --line)
{
stream.Read(data, line * stride, stride);
}
}
else
{
for(line = 0; line < frame.Height; line++)
{
stream.Read(data, line * stride, stride);
}
}
}