private void MovePixels(byte i_mode) //0 => move left; 1 => move right
{
if (comboDisplayType.SelectedIndex == 1) //Sprite view only for now
{
//move pixels left
int bytesToMoveLeft = (this.bitmapGridSpriteView.getGridWidth() / 8) * this.bitmapGridSpriteView.getGridHeight();
ushort screenPointer = (ushort)numericUpDownActualAddress.Value;
//moving right to left
int maxScreenByteToMove = (this.bitmapGridSpriteView.getGridWidth() / 8) * this.bitmapGridSpriteView.getGridHeight();
int spriteViewWidthInTokens = this.bitmapGridSpriteView.getGridWidth() / 8;
bool isLastTokenInLine = false;
for (int pixelPointer = 0; pixelPointer < maxScreenByteToMove; pixelPointer++)
{
bool setZeroBit;
if (screenPointer <= 0xFFFF && this.bitmapGridSpriteView.getGridWidth() > 8)
{
setZeroBit = GraphicsTools.IsBitSet(_spectrum.ReadMemory((ushort)(screenPointer + 1)), 7);
}
else
{
setZeroBit = false;
}
isLastTokenInLine = ((pixelPointer + 1) % spriteViewWidthInTokens == 0);
isLastTokenInLine = isLastTokenInLine && spriteViewWidthInTokens != 1 && pixelPointer != 0 && pixelPointer != maxScreenByteToMove;
if (i_mode == 0)
{
byte actByte = (byte)(_spectrum.ReadMemory(screenPointer) << 1);
//set bit 0(most right) if there is a sprite view bitmap size more than 8 pixels(continous scrolling)
if (isLastTokenInLine == false && screenPointer + 1 <= 0xFFFF)
{
if (setZeroBit)
{
actByte |= 0x01;
}
}
//move left
_spectrum.WriteMemory(screenPointer, actByte);
}
else
{
//move right
_spectrum.WriteMemory(screenPointer, (byte)(_spectrum.ReadMemory(screenPointer) >> 1));
}
screenPointer++; //move to next byte
}
}
else
{
Locator.Resolve <IUserMessage>().Info("This feature implemented only for Sprite view...Todo!");
}
//Refresh
setZXImage();
}