private static int ClonePixel(BitmapData dataOrig, BitmapData dataNew, VRageMath.Vector2I tileBorder, byte[] dataBytesOrig,
int iRowOrig, int iColumnOrig, byte[] dataBytesNew, int iRowNew, int iColumnNew)
{
for (int iMargin = 0; iMargin < tileBorder.X; iMargin++)
{
Buffer.BlockCopy(dataBytesOrig, iRowOrig * dataOrig.Stride + 4 * iColumnOrig,
dataBytesNew, iRowNew * dataNew.Stride + 4 * iColumnNew,
4);
iColumnNew++;
}
return(iColumnNew);
}
// simulates OpenGL's GL_CLAMP_TO_EDGE on the tileset
protected static void IncreaseTileBorders(BitmapData dataOrig, BitmapData dataNew, int tilesPerRow, int tilesPerColumn,
TilesetImage tilesetImage)
{
VRageMath.Vector2I tileSize = tilesetImage.TileSize;
VRageMath.Vector2I tileBorder = tilesetImage.TileBorder;
VRageMath.Vector2I tileMargin = tilesetImage.TileMargin;
// Get the address of the first line.
IntPtr dataOrigPtr = dataOrig.Scan0;
IntPtr dataNewPtr = dataNew.Scan0;
// Declare an array to hold the bytes of the bitmap.
int bytesOrig = Math.Abs(dataOrig.Stride) * dataOrig.Height;
int bytesNew = Math.Abs(dataNew.Stride) * dataNew.Height;
byte[] dataBytesOrig = new byte[bytesOrig];
byte[] dataBytesNew = new byte[bytesNew];
// Copy the RGB values into the array.
System.Runtime.InteropServices.Marshal.Copy(dataOrigPtr, dataBytesOrig, 0, bytesOrig);
int iRowOrig = 0;
int iRowNew = 0;
for (int i = 0; i < tilesPerColumn; i++)
{
// space between tiles
if (i != 0)
{
iRowOrig += tileMargin.Y;
iRowNew += tileMargin.Y;
}
// tiles
for (int iTileY = 0; iTileY < tileSize.Y; iTileY++)
{
int iColumnOrig = 0;
int iColumnNew = 0;
// the copy operations multiply bytes by 4, because the pixel is 32 bits
// copy the tile row
for (int j = 0; j < tilesPerRow; j++)
{
if (j != 0)
{
iColumnOrig += tileMargin.X;
iColumnNew += tileMargin.X;
}
// copy the leading pixel (tileBorder.X times)
iColumnNew = ClonePixel(dataOrig, dataNew, tileBorder, dataBytesOrig, iRowOrig, iColumnOrig, dataBytesNew, iRowNew, iColumnNew);
// copy the tile pixels
Buffer.BlockCopy(dataBytesOrig, iRowOrig * dataOrig.Stride + 4 * iColumnOrig,
dataBytesNew, iRowNew * dataNew.Stride + 4 * iColumnNew,
4 * tileSize.X);
iColumnOrig += tileSize.X;
iColumnNew += tileSize.X;
// copy the trailing pixel (tileBorder.X times)
iColumnNew = ClonePixel(dataOrig, dataNew, tileBorder, dataBytesOrig, iRowOrig, iColumnOrig - 1, dataBytesNew, iRowNew, iColumnNew);
}
PremultiplyAlpha(dataBytesNew, dataNew.Stride, iRowNew);
// if first or last tile row was copied, duplicate it (tileBorder.Y times)
if (iTileY == 0 || iTileY == tileSize.Y - 1)
{
for (int iMargin = 0; iMargin < tileBorder.Y; iMargin++)
{
// copy the current row in dataNew to next row
Buffer.BlockCopy(dataBytesNew, iRowNew * dataNew.Stride, dataBytesNew,
(iRowNew + 1) * dataNew.Stride, dataNew.Stride);
iRowNew++;
}
}
iRowNew++;
iRowOrig++;
}
}
System.Runtime.InteropServices.Marshal.Copy(dataBytesNew, 0, dataNewPtr, bytesNew);
}
