public pCpu(pRom romOffset, Level level)
: this(level.CreatePointer(romOffset).Value)
{
}
/// <summary>
///
/// </summary>
/// <param name="changeInOffset">The distance the beginning data should be written to, relative to the current location.</param>
private void ApplyItemData(int changeInOffset)
{
SortScreenData();
int currentRow = -1;
bool lastRow = false;
//int currentOffset = originalData.GetFirstRowOffset();
int currentOffset = (int)OffsetItemPointer(changeInOffset);
byte[] data = level.Rom.data;
// Each row has a pointer to next row. This can't be written until we actually get
// to the next row, so we remember where the pointer is so that when we start next
// row we can go back and set the pointer.
int pendingPointerOffset = -1;
for (int i = 0; i < Screens.Count; i++)
{
Point location = Screens[i].MapLocation;
bool lastScreenInRow = (i == Screens.Count - 1) || (Screens[i + 1].MapLocation.Y != Screens[i].MapLocation.Y);
if (location.Y != currentRow)
{
Debug.Assert(currentRow < location.Y);
currentRow = location.Y;
// Write pointer to this new row:
if (pendingPointerOffset != -1)
{
var pointer = level.CreatePointer((pRom)currentOffset);
data[pendingPointerOffset] = pointer.Byte1;
data[pendingPointerOffset + 1] = pointer.Byte2;
}
// Specify map Y
data[currentOffset] = (byte)currentRow;
currentOffset++;
// Mark pointer to next row, and seek past it
pendingPointerOffset = currentOffset;
currentOffset += 2;
}
var items = Screens[i].Data.Items;
int screenBytes = 3; // 2 for header [mapX, size], 1 for footer [$00]
// Calculate size of screen data
for (int iItem = 0; iItem < items.Count; iItem++)
{
screenBytes += items[iItem].Size;
}
// Write screen header
data[currentOffset] = (byte)location.X;
currentOffset++;
data[currentOffset] = (byte)(lastScreenInRow ? 0xFF : screenBytes);
currentOffset++;
// Write item data
for (int iItem = 0; iItem < items.Count; iItem++)
{
items[iItem].WriteData(data, ref currentOffset);
}
data[currentOffset] = 0;
currentOffset++;
}
// Last row has 0xFFFF for a pointer
data[pendingPointerOffset] = 0xFF;
data[pendingPointerOffset + 1] = 0xFF;
}