cpp/openttd-patchpack/source Files · src/blitter/32bpp_anim.hpp

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r24422:3fa67b2abcd2 3.4 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 32bpp_anim.hpp A 32 bpp blitter with animation support. */

#ifndef BLITTER_32BPP_ANIM_HPP
#define BLITTER_32BPP_ANIM_HPP

#include "32bpp_optimized.hpp"

/** The optimised 32 bpp blitter with palette animation. */
class Blitter_32bppAnim : public Blitter_32bppOptimized {
protected:
	uint16 *anim_buf;    ///< In this buffer we keep track of the 8bpp indexes so we can do palette animation
	void *anim_alloc;    ///< The raw allocated buffer, not necessarily aligned correctly
	int anim_buf_width;  ///< The width of the animation buffer.
	int anim_buf_height; ///< The height of the animation buffer.
	int anim_buf_pitch;  ///< The pitch of the animation buffer (width rounded up to 16 byte boundary).
	Palette palette;     ///< The current palette.

public:
	Blitter_32bppAnim() :
		anim_buf(nullptr),
		anim_alloc(nullptr),
		anim_buf_width(0),
		anim_buf_height(0),
		anim_buf_pitch(0)
	{
		this->palette = _cur_palette;
	}

	~Blitter_32bppAnim();

	void Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom) override;
	void DrawColourMappingRect(void *dst, int width, int height, PaletteID pal) override;
	void SetPixel(void *video, int x, int y, 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 DrawRect(void *video, int width, int height, uint8 colour) 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 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;
	void PaletteAnimate(const Palette &palette) override;
	Blitter::PaletteAnimation UsePaletteAnimation() override;

	const char *GetName() override { return "32bpp-anim"; }
	int GetBytesPerPixel() override { return 6; }
	void PostResize() override;

	/**
	 * Look up the colour in the current palette.
	 */
	inline Colour LookupColourInPalette(uint index)
	{
		return this->palette.palette[index];
	}

	inline int ScreenToAnimOffset(const uint32 *video)
	{
		int raw_offset = video - (const uint32 *)_screen.dst_ptr;
		if (_screen.pitch == this->anim_buf_pitch) return raw_offset;
		int lines = raw_offset / _screen.pitch;
		int across = raw_offset % _screen.pitch;
		return across + (lines * this->anim_buf_pitch);
	}

	template <BlitterMode mode> void Draw(const Blitter::BlitterParams *bp, ZoomLevel zoom);
};

/** Factory for the 32bpp blitter with animation. */
class FBlitter_32bppAnim : public BlitterFactory {
public:
	FBlitter_32bppAnim() : BlitterFactory("32bpp-anim", "32bpp Animation Blitter (palette animation)") {}
	Blitter *CreateInstance() override { return new Blitter_32bppAnim(); }
};

#endif /* BLITTER_32BPP_ANIM_HPP */