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gfx.h
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gfx.h
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/*
* Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
*
* (c) Copyright 1996 - 2001 Gary Henderson ([email protected]) and
* Jerremy Koot ([email protected])
*
* Super FX C emulator code
* (c) Copyright 1997 - 1999 Ivar ([email protected]) and
* Gary Henderson.
* Super FX assembler emulator code (c) Copyright 1998 zsKnight and _Demo_.
*
* DSP1 emulator code (c) Copyright 1998 Ivar, _Demo_ and Gary Henderson.
* C4 asm and some C emulation code (c) Copyright 2000 zsKnight and _Demo_.
* C4 C code (c) Copyright 2001 Gary Henderson ([email protected]).
*
* DOS port code contains the works of other authors. See headers in
* individual files.
*
* Snes9x homepage: http://www.snes9x.com
*
* Permission to use, copy, modify and distribute Snes9x in both binary and
* source form, for non-commercial purposes, is hereby granted without fee,
* providing that this license information and copyright notice appear with
* all copies and any derived work.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event shall the authors be held liable for any damages
* arising from the use of this software.
*
* Snes9x is freeware for PERSONAL USE only. Commercial users should
* seek permission of the copyright holders first. Commercial use includes
* charging money for Snes9x or software derived from Snes9x.
*
* The copyright holders request that bug fixes and improvements to the code
* should be forwarded to them so everyone can benefit from the modifications
* in future versions.
*
* Super NES and Super Nintendo Entertainment System are trademarks of
* Nintendo Co., Limited and its subsidiary companies.
*/
#ifndef _GFX_H_
#define _GFX_H_
#include "port.h"
struct SGFX {
// Initialize these variables
uint8 *Screen;
uint8 *SubScreen;
uint8 *ZBuffer;
uint8 *SubZBuffer;
uint32 Pitch; /// Width of surface in bytes
uint32 ZPitch; /// Pitch of ZBuffer
uint32 Delta; /// Set to (GFX.SubScreen - GFX.Screen) >> 1
uint32 DepthDelta; /// Set to GFX.SubZBuffer - GFX.ZBuffer
uint32 PPL; /// Number of pixels per line (= pitch in pixels)
// Setup in call to S9xGraphicsInit()
uint16 *X2;
uint16 *ZERO_OR_X2;
uint16 *ZERO;
uint8 *S;
uint8 *DB;
uint16 *ScreenColors;
uint8 Z1;
uint8 Z2;
uint32 FixedColour;
char *InfoString;
uint32 InfoStringTimeout;
uint32 StartY;
uint32 EndY;
struct ClipData *pCurrentClip;
uint32 Mode7Mask;
uint32 Mode7PriorityMask;
int OBJList [129];
uint32 Sizes [129];
int VPositions [129];
uint8 r212c;
uint8 r212d;
uint8 r2130;
uint8 r2131;
bool8 Pseudo;
#ifdef GFX_MULTI_FORMAT
uint32 PixelFormat;
uint32 (*BuildPixel) (uint32 R, uint32 G, uint32 B);
uint32 (*BuildPixel2) (uint32 R, uint32 G, uint32 B);
void (*DecomposePixel) (uint32 Pixel, uint32 &R, uint32 &G, uint32 &B);
#endif
};
struct SLineData {
struct {
uint16 VOffset;
uint16 HOffset;
} BG [4];
};
#define H_FLIP 0x4000
#define V_FLIP 0x8000
#define BLANK_TILE 2
#define IN_VIDEO_MEMORY 3
struct SBG
{
uint32 TileSize;
uint32 BitShift;
uint32 TileShift;
uint32 TileAddress;
uint32 NameSelect;
uint32 SCBase;
uint32 StartPalette;
uint32 PaletteShift;
uint32 PaletteMask;
uint8 *Buffer;
uint8 *Buffered;
bool8 DirectColourMode;
};
struct SLineMatrixData
{
short MatrixA;
short MatrixB;
short MatrixC;
short MatrixD;
short CentreX;
short CentreY;
};
extern uint32 odd_high [4][16];
extern uint32 odd_low [4][16];
extern uint32 even_high [4][16];
extern uint32 even_low [4][16];
extern SBG BG;
extern uint16 DirectColourMaps [8][256];
//extern uint8 add32_32 [32][32];
//extern uint8 add32_32_half [32][32];
//extern uint8 sub32_32 [32][32];
//extern uint8 sub32_32_half [32][32];
extern uint8 mul_brightness [16][32];
// Could use BSWAP instruction on Intel port...
#define SWAP_DWORD(dw) dw = ((dw & 0xff) << 24) | ((dw & 0xff00) << 8) | \
((dw & 0xff0000) >> 8) | ((dw & 0xff000000) >> 24)
#ifdef FAST_LSB_WORD_ACCESS
#define READ_2BYTES(s) (*(uint16 *) (s))
#define WRITE_2BYTES(s, d) *(uint16 *) (s) = (d)
#else
#ifdef LSB_FIRST
#define READ_2BYTES(s) (*(uint8 *) (s) | (*((uint8 *) (s) + 1) << 8))
#define WRITE_2BYTES(s, d) *(uint8 *) (s) = (d), \
*((uint8 *) (s) + 1) = (d) >> 8
#else // else MSB_FISRT
#define READ_2BYTES(s) (*(uint8 *) (s) | (*((uint8 *) (s) + 1) << 8))
#define WRITE_2BYTES(s, d) *(uint8 *) (s) = (d), \
*((uint8 *) (s) + 1) = (d) >> 8
#endif // LSB_FIRST
#endif // i386
#define SUB_SCREEN_DEPTH 0
#define MAIN_SCREEN_DEPTH 32
#if defined(OLD_COLOUR_BLENDING)
#define COLOR_ADD(C1, C2) \
GFX.X2 [((((C1) & RGB_REMOVE_LOW_BITS_MASK) + \
((C2) & RGB_REMOVE_LOW_BITS_MASK)) >> 1) + \
((C1) & (C2) & RGB_LOW_BITS_MASK)]
#else
#define COLOR_ADD(C1, C2) \
(GFX.X2 [((((C1) & RGB_REMOVE_LOW_BITS_MASK) + \
((C2) & RGB_REMOVE_LOW_BITS_MASK)) >> 1) + \
((C1) & (C2) & RGB_LOW_BITS_MASK)] | \
(((C1) ^ (C2)) & RGB_LOW_BITS_MASK))
#endif
#define COLOR_ADD1_2(C1, C2) \
((((((C1) & RGB_REMOVE_LOW_BITS_MASK) + \
((C2) & RGB_REMOVE_LOW_BITS_MASK)) >> 1) + \
((C1) & (C2) & RGB_LOW_BITS_MASK)) | ALPHA_BITS_MASK)
#if defined(OLD_COLOUR_BLENDING)
#define COLOR_SUB(C1, C2) \
GFX.ZERO_OR_X2 [(((C1) | RGB_HI_BITS_MASKx2) - \
((C2) & RGB_REMOVE_LOW_BITS_MASK)) >> 1]
#else
#define COLOR_SUB(C1, C2) \
(GFX.ZERO_OR_X2 [(((C1) | RGB_HI_BITS_MASKx2) - \
((C2) & RGB_REMOVE_LOW_BITS_MASK)) >> 1] + \
((C1) & RGB_LOW_BITS_MASK) - ((C2) & RGB_LOW_BITS_MASK))
#endif
#define COLOR_SUB1_2(C1, C2) \
GFX.ZERO [(((C1) | RGB_HI_BITS_MASKx2) - \
((C2) & RGB_REMOVE_LOW_BITS_MASK)) >> 1]
typedef intptr_t tile_offset_t;
typedef void (*NormalTileRenderer) (uint32 Tile, tile_offset_t Offset,
uint32 StartLine, uint32 LineCount);
typedef void (*ClippedTileRenderer) (uint32 Tile, tile_offset_t Offset,
uint32 StartPixel, uint32 Width,
uint32 StartLine, uint32 LineCount);
typedef void (*LargePixelRenderer) (uint32 Tile, tile_offset_t Offset,
uint32 StartPixel, uint32 Pixels,
uint32 StartLine, uint32 LineCount);
START_EXTERN_C
void S9xStartScreenRefresh ();
void S9xDrawScanLine (uint8 Line);
void S9xEndScreenRefresh ();
void S9xSetupOBJ (struct SOBJ *);
void S9xUpdateScreen ();
void RenderLine (uint8 line);
void S9xBuildDirectColourMaps ();
// External port interface which must be implemented or initialised for each
// port.
extern struct SGFX GFX;
bool8 S9xGraphicsInit ();
void S9xGraphicsDeinit();
bool8 S9xInitUpdate (void);
bool8 S9xDeinitUpdate (int Width, int Height);
void S9xSyncSpeed ();
#ifdef GFX_MULTI_FORMAT
bool8 S9xSetRenderPixelFormat (int format);
#endif
void S9xSetInfoString(const char * fmt, ...);
END_EXTERN_C
#endif