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morphos_scaler.h

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2002 The ScummVM project
 *
 * This program 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; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * $Header: /cvsroot/scummvm/scummvm/backends/morphos/morphos_scaler.h,v 1.2 2002/12/25 11:38:21 tomjoad Exp $
 */

#ifndef MORPHOS_MORPHOSSCALER_H
#define MORPHOS_MORPHOSSCALER_H

#include <graphics/gfx.h>

typedef enum { ST_INVALID = 0, ST_NONE, ST_POINT, ST_ADVMAME2X, ST_SUPEREAGLE, ST_SUPER2XSAI } SCALERTYPE;

class MorphOSScaler
{
      public:
            MorphOSScaler(APTR buffer, int width, int height, ULONG *col_table, UWORD *col_table16, BitMap *bmap);
            virtual ~MorphOSScaler();

            bool Prepare(BitMap *render_bmap);
            void Finish();

            virtual void Scale(uint32 src_x, uint32 src_y, uint32 dest_x, uint32 dest_y, uint32 width, uint32 height) = 0;

            static MorphOSScaler *Create(SCALERTYPE st, APTR buffer, int width, int height, ULONG *col_table, UWORD *col_table16, BitMap *bmap);

            static SCALERTYPE FindByName(const char *ScalerName);
            static SCALERTYPE FindByIndex(int index);
            static const char *GetParamName(SCALERTYPE type);

      protected:
            struct GfxScaler
            {
                  STRPTR            gs_Name;
                  STRPTR            gs_ParamName;
                  SCALERTYPE  gs_Type;
            };

            static GfxScaler ScummScalers[11];

            static uint32 MakeColor(int pixfmt, int r, int g, int b);

            byte *dest;
            uint32 dest_bpp;
            uint32 dest_pitch;
            uint32 dest_pixfmt;
            APTR handle;
            
            uint32 colorMask;
            uint32 lowPixelMask;
            uint32 qcolorMask;
            uint32 qlowpixelMask;
            uint32 redblueMask;
            uint32 greenMask;
            int PixelsPerMask;
            byte *src_line[4];
            byte *dst_line[2];
            bool ScummPCMode;

            APTR Buffer;
            ULONG BufferWidth;
            ULONG BufferHeight;
            ULONG *ScummColors;
            USHORT *ScummColors16;
};

#define DECLARE_SCALER(scaler_name) class scaler_name ## Scaler : public MorphOSScaler \
      { public: scaler_name ## Scaler(APTR buffer, int width, int height, ULONG *col_table, UWORD *col_table16, BitMap *bmap) : MorphOSScaler(buffer, width, height, col_table, col_table16, bmap) {} \
        void Scale(uint32 src_x, uint32 src_y, uint32 dest_x, uint32 dest_y, uint32 width, uint32 height); \
      };


DECLARE_SCALER(Point)
DECLARE_SCALER(AdvMame2x)
DECLARE_SCALER(SuperEagle)
DECLARE_SCALER(Super2xSaI)

#endif


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