(svn r3992) -Fix: Rewrote the code to determine whether a rail-tile can be terraformed.
Fixes a bug where you could terraform a tunnel (fixed by r3228, but reverted that one)
Fixes a bug introduced by r3228 which allowed steep rail tiles resulting in ... unwanted effects such as display artifacts.
That means the terraform feature should not work as intended; it also uses _valid_tileh_slopes to determine valid configurations instead of hand-brewn stuff.
TODO: _terraform_err_tile and similar TileIndices should have INVALID_TILE as "unused", not 0. (0 is a valid tile).

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/* $Id$ */

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#ifndef SCREENSHOT_H

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#define SCREENSHOT_H

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void InitializeScreenshotFormats(void);

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const char *GetScreenshotFormatDesc(int i);

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void SetScreenshotFormat(int i);

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bool MakeScreenshot(void);

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bool MakeWorldScreenshot(int left, int top, int width, int height, int zoom);

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extern char _screenshot_format_name[8];

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extern uint _num_screenshot_formats;

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extern uint _cur_screenshot_format;

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#endif /* SCREENSHOT_H */