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117 lines
4.3 KiB
C++
117 lines
4.3 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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*/
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/**
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* @file
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* YUV to RGB conversion used in engines:
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* - mohawk
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* - scumm (he)
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* - sword25
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*/
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#ifndef GRAPHICS_YUV_TO_RGB_H
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#define GRAPHICS_YUV_TO_RGB_H
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#include "common/scummsys.h"
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#include "common/singleton.h"
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#include "graphics/surface.h"
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namespace Graphics {
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class YUVToRGBLookup;
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class YUVToRGBManager : public Common::Singleton<YUVToRGBManager> {
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public:
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/** The scale of the luminance values */
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enum LuminanceScale {
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kScaleFull, /** Luminance values range from [0, 255] */
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kScaleITU /** Luminance values range from [16, 235], the range from ITU-R BT.601 */
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};
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/**
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* Convert a YUV444 image to an RGB surface
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*
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* @param dst the destination surface
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* @param scale the scale of the luminance values
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* @param ySrc the source of the y component
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* @param uSrc the source of the u component
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* @param vSrc the source of the v component
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* @param yWidth the width of the y surface
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* @param yHeight the height of the y surface
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* @param yPitch the pitch of the y surface
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* @param uvPitch the pitch of the u and v surfaces
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*/
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void convert444(Graphics::Surface *dst, LuminanceScale scale, const byte *ySrc, const byte *uSrc, const byte *vSrc, int yWidth, int yHeight, int yPitch, int uvPitch);
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/**
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* Convert a YUV420 image to an RGB surface
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*
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* @param dst the destination surface
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* @param scale the scale of the luminance values
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* @param ySrc the source of the y component
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* @param uSrc the source of the u component
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* @param vSrc the source of the v component
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* @param yWidth the width of the y surface (must be divisible by 2)
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* @param yHeight the height of the y surface (must be divisible by 2)
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* @param yPitch the pitch of the y surface
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* @param uvPitch the pitch of the u and v surfaces
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*/
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void convert420(Graphics::Surface *dst, LuminanceScale scale, const byte *ySrc, const byte *uSrc, const byte *vSrc, int yWidth, int yHeight, int yPitch, int uvPitch);
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/**
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* Convert a YUV410 image to an RGB surface
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*
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* Since the chroma has a very low resolution in 410, we perform bilinear scaling
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* on the two chroma planes to produce the image. The chroma planes must have
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* at least one extra row and one extra column that can be read from in order to
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* produce a proper image. It is suggested that you fill these in with the previous
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* row and column's data. This is required in order to speed up this function.
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*
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* @param dst the destination surface
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* @param scale the scale of the luminance values
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* @param ySrc the source of the y component
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* @param uSrc the source of the u component
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* @param vSrc the source of the v component
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* @param yWidth the width of the y surface (must be divisible by 4)
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* @param yHeight the height of the y surface (must be divisible by 4)
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* @param yPitch the pitch of the y surface
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* @param uvPitch the pitch of the u and v surfaces
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*/
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void convert410(Graphics::Surface *dst, LuminanceScale scale, const byte *ySrc, const byte *uSrc, const byte *vSrc, int yWidth, int yHeight, int yPitch, int uvPitch);
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private:
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friend class Common::Singleton<SingletonBaseType>;
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YUVToRGBManager();
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~YUVToRGBManager();
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const YUVToRGBLookup *getLookup(Graphics::PixelFormat format, LuminanceScale scale);
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YUVToRGBLookup *_lookup;
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int16 _colorTab[4 * 256]; // 2048 bytes
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};
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} // End of namespace Graphics
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#define YUVToRGBMan (::Graphics::YUVToRGBManager::instance())
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#endif
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