cpp/openttd-patchpack/source Files · src/blitter/null.hpp

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r24422:3fa67b2abcd2 2.4 KiB text/x-c++hdr Show Annotation Show as Raw Download as Raw

Patric Stout

Fix: change the working-dir searchpath when using '-c'

Basically, with '-c' you now create a sandbox. It will still use
your personal-dir and global-dir to find files you installed there,
but all new files are stored with a base folder identical to the
folder the configuration is in.

This is a bit of an old bug, that we many have tried to solve in
various of different ways. The code has grown sufficiently complex
that it is hard to see what consequences of actions are. This is
in my opinion the most harmless solution, while increasing the
usefulness of the '-c' flag.

In essence, the problem was that empty folders were always created
in the directory where the configuration was, but as that directory
wasn't added to any searchpath, files weren't stored there, unless
by accident it was a folder already on the searchpath. For example,
if you do './openttd -c local.cfg', it did work as expected. But
in the more generic variant, it did not.

With this patch, you can run './openttd -c /new/folder/local.cfg',
and it will create and prepare that folder to receive new files.

'content_download' is also stored in the directory the
configuration is in; this was already the case. Important to
note that there is only one search-path for 'content_download'.
In other words, when using '-c', it will not look in '~/.openttd'
inside the 'content_download' folder.

/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */

/** @file null.hpp The blitter that doesn't blit. */

#ifndef BLITTER_NULL_HPP
#define BLITTER_NULL_HPP

#include "factory.hpp"

/** Blitter that does nothing. */
class Blitter_Null : public Blitter {
public:
	uint8 GetScreenDepth() override { return 0; }
	void Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom) override {};
	void DrawColourMappingRect(void *dst, int width, int height, PaletteID pal) override {};
	Sprite *Encode(const SpriteLoader::Sprite *sprite, AllocatorProc *allocator) override;
	void *MoveTo(void *video, int x, int y) override { return nullptr; };
	void SetPixel(void *video, int x, int y, uint8 colour) override {};
	void DrawRect(void *video, int width, int height, uint8 colour) override {};
	void DrawLine(void *video, int x, int y, int x2, int y2, int screen_width, int screen_height, uint8 colour, int width, int dash) override {};
	void CopyFromBuffer(void *video, const void *src, int width, int height) override {};
	void CopyToBuffer(const void *video, void *dst, int width, int height) override {};
	void CopyImageToBuffer(const void *video, void *dst, int width, int height, int dst_pitch) override {};
	void ScrollBuffer(void *video, int &left, int &top, int &width, int &height, int scroll_x, int scroll_y) override {};
	int BufferSize(int width, int height) override { return 0; };
	void PaletteAnimate(const Palette &palette) override { };
	Blitter::PaletteAnimation UsePaletteAnimation() override { return Blitter::PALETTE_ANIMATION_NONE; };

	const char *GetName() override { return "null"; }
	int GetBytesPerPixel() override { return 0; }
};

/** Factory for the blitter that does nothing. */
class FBlitter_Null : public BlitterFactory {
public:
	FBlitter_Null() : BlitterFactory("null", "Null Blitter (does nothing)") {}
	Blitter *CreateInstance() override { return new Blitter_Null(); }
};

#endif /* BLITTER_NULL_HPP */