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74 lines
2.0 KiB
C
74 lines
2.0 KiB
C
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef GRAPHICS_SCALER_ASPECT_H
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#define GRAPHICS_SCALER_ASPECT_H
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#include "common/scummsys.h"
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#include "graphics/scaler.h"
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/**
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* TODO: explain
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*/
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FORCEINLINE int real2Aspect(int y) {
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return y + (y + 1) / 5;
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}
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/**
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* TODO: explain
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*/
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FORCEINLINE int aspect2Real(int y) {
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return (y * 5 + 4) / 6;
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}
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/**
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* TODO: explain
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*/
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void makeRectStretchable(int &x, int &y, int &w, int &h);
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/**
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* TODO: explain
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*/
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int stretch200To240(uint8 *buf,
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uint32 pitch,
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int width,
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int height,
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int srcX,
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int srcY,
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int origSrcY);
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/**
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* This filter (up)scales the source image vertically by a factor of 6/5.
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* For example, a 320x200 image is scaled to 320x240.
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*
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* The main difference to the code in graphics/scaler/aspect.cpp is the
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* out-of-place operation, omitting a straight blit step the sdl backend
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* does. Also, tests show unaligned access errors with the stock aspect scaler.
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*/
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DECLARE_SCALER(Normal1xAspect);
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#ifdef USE_ARM_SCALER_ASM
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DECLARE_SCALER(Normal2xAspect);
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#endif
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#endif
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