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82 lines
2.4 KiB
C++
82 lines
2.4 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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (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, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef GRAPHICS_LARRYSCALE_H
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#define GRAPHICS_LARRYSCALE_H
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#include "common/scummsys.h"
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namespace Graphics {
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/*
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LarryScale is a bitmap scaler for cartoon images.
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Features:
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* Supports arbitrary scaling factors along both axes (but looks best between 50% and 200%).
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* When downscaling: preserves fine details.
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* When upscaling: keeps lines smooth, introducing very few block artifacts.
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* Does not introduce additional colors.
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Limitations:
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* Lines must not be anti-aliased and should be only one pixel wide.
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* Fills should be flat without gradients.
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*/
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typedef byte LarryScaleColor;
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class RowReader {
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public:
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virtual const LarryScaleColor *readRow(int y) = 0;
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virtual ~RowReader() {}
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};
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class RowWriter {
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public:
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virtual void writeRow(int y, const LarryScaleColor *row) = 0;
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virtual ~RowWriter() {}
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};
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/**
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* @param srcWidth The width, in pixels, of the original image
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* @param srcHeight The height, in pixels, of the original image
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* @param transparentColor The transparent color. Used for outline detection.
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* @param rowReader An object with a callback method for reading the lines of the original
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* image
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* @param dstWidth The width, in pixels, of the scaled target image
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* @param dstHeight The height, in pixels, of the scaled target image
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* @param rowWriter An object with a callback method accepting the lines of the target image
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*/
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void larryScale(
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int srcWidth, int srcHeight,
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LarryScaleColor transparentColor,
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RowReader &rowReader,
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int dstWidth, int dstHeight,
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RowWriter &rowWriter
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);
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}
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#endif
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