include/render.h

/*
 *  Copyright (C) 2002-2020  The DOSBox Team
 *
 *  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.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

#ifndef DOSBOX_RENDER_H
#define DOSBOX_RENDER_H

// 0: complex scalers off, scaler cache off, some simple scalers off, memory requirements reduced
// 1: complex scalers off, scaler cache off, all simple scalers on
// 2: complex scalers off, scaler cache on
// 3: complex scalers on
#define RENDER_USE_ADVANCED_SCALERS 3

#include "../src/gui/render_scalers.h"

#define RENDER_SKIP_CACHE       16
//Enable this for scalers to support 0 input for empty lines
//#define RENDER_NULL_INPUT

enum ASPECT_MODES {
    ASPECT_FALSE = 0
    ,ASPECT_TRUE
#if C_SURFACE_POSTRENDER_ASPECT
    ,ASPECT_NEAREST
    ,ASPECT_BILINEAR
#endif
};

typedef struct {
        struct { 
                Bit8u red;
                Bit8u green;
                Bit8u blue;
                Bit8u unused;
        } rgb[256];
        union {
                Bit16u b16[256];
                Bit32u b32[256];
        } lut;
        bool changed;
        Bit8u modified[256];
        Bitu first;
        Bitu last;
} RenderPal_t;

typedef struct {
        struct {
                Bitu width, start;
                Bitu height;
                Bitu bpp;
                bool dblw,dblh;
                double ratio;
                float fps;
                double scrn_ratio;
        } src;
        struct {
                Bitu count;
                Bitu max;
                Bitu index;
                Bit8u hadSkip[RENDER_SKIP_CACHE];
        } frameskip;
        struct {
                Bitu size;
                scalerMode_t inMode;
                scalerMode_t outMode;
                scalerOperation_t op;
                bool clearCache;
                bool forced;
                bool hardware;
                ScalerLineHandler_t lineHandler;
                ScalerLineHandler_t linePalHandler;
                ScalerComplexHandler_t complexHandler;
                Bitu blocks, lastBlock;
                Bitu outPitch;
                Bit8u *outWrite;
                Bitu cachePitch;
                Bit8u *cacheRead;
                Bitu inHeight, inLine, outLine;
        } scale;
    RenderPal_t pal;
        bool updating;
        bool active;
        int aspect;
    bool aspectOffload;
        bool fullFrame;
        bool forceUpdate;
        bool autofit;
} Render_t;

extern Render_t render;
extern Bitu last_gfx_flags;
extern ScalerLineHandler_t RENDER_DrawLine;
void RENDER_SetSize(Bitu width,Bitu height,Bitu bpp,float fps,double scrn_ratio);
bool RENDER_StartUpdate(void);
void RENDER_EndUpdate(bool abort);
void RENDER_SetPal(Bit8u entry,Bit8u red,Bit8u green,Bit8u blue);


#endif