Blank map when using higher resolution than 640x480

[JanSimek]

It seems to happen only on larger maps such as arcaves.map and broken1.map and not the smaller ones such as artemple.map or desert1.map .

When loading certain maps the tileSetCenter function fails and returns -1 on the following check:

fallout2-ce/src/tile.cc

Lines 508 to 512 in 0c61f74

	if (_borderInitialized) {
	if (tile_x <= _tile_border || tile_x >= dword_66BBCC || tile_y <= dword_66BBC8 || tile_y >= dword_66BBD0) {
	return -1;
	}
	}

My guess is that the code above checks whether the center tile is outside of the scroll block area.

I suspect that the bug is somewhere in the _tile_set_border function. Specifically, this part looks suspicious as the windowWidth parameter is not used anywhere:

fallout2-ce/src/tile.cc

Lines 402 to 405 in 0c61f74

	void _tile_set_border(int windowWidth, int windowHeight, int hexGridWidth, int hexGridHeight)
	{
	int v1 = tileFromScreenXY(-320, -240, 0);
	int v2 = tileFromScreenXY(-320, windowHeight + 240, 0);

[alexbatalov]

Check it on your map. I've seen something you describe in Gecko, but I'm not sure.

[JanSimek]

The problem is in the tileFromScreenXY() function which relies on the _tile_offx and _tile_offy variables. These are in turn calculated from gTileWindowWidth (= real window width) and gTileWindowHeight (= real window height).

HRP for reference