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#include "../copyright"
#ifndef _GFX_H_
#define _GFX_H_
#include "port.h"
#include "snes9x.h"
void S9xStartScreenRefresh();
void S9xDrawScanLine(uint8_t Line);
void S9xEndScreenRefresh();
void S9xSetupOBJ();
void S9xUpdateScreen();
void RenderLine(uint8_t line);
void S9xBuildDirectColourMaps();
// External port interface which must be implemented or initialised for each
// port.
extern struct SGFX GFX;
bool S9xInitGFX();
void S9xDeinitGFX();
bool S9xInitUpdate(void);
struct SGFX
{
// Initialize these variables
uint8_t* Screen_buffer;
uint8_t* SubScreen_buffer;
uint8_t* ZBuffer_buffer;
uint8_t* SubZBuffer_buffer;
uint8_t* Screen;
uint8_t* SubScreen;
uint8_t* ZBuffer;
uint8_t* SubZBuffer;
uint32_t Pitch;
// Setup in call to S9xInitGFX()
int Delta;
uint16_t* X2;
uint16_t* ZERO_OR_X2;
uint16_t* ZERO;
uint32_t RealPitch; // True pitch of Screen buffer.
uint32_t Pitch2; // Same as RealPitch except while using speed up hack for Glide.
uint32_t ZPitch; // Pitch of ZBuffer
uint32_t PPL; // Number of pixels on each of Screen buffer
uint32_t PPLx2;
uint32_t PixSize;
uint8_t S_safety_margin[8];
uint8_t* S;
uint8_t DB_safety_margin[8];
uint8_t* DB;
ptrdiff_t DepthDelta;
uint8_t Z1; // Depth for comparison
uint8_t Z2; // Depth to save
uint8_t ZSprite; // Used to ensure only 1st sprite is drawn per pixel
uint32_t FixedColour;
const char* InfoString;
uint32_t InfoStringTimeout;
uint32_t StartY;
uint32_t EndY;
struct ClipData* pCurrentClip;
uint32_t Mode7Mask;
uint32_t Mode7PriorityMask;
uint8_t OBJWidths[128];
uint8_t OBJVisibleTiles[128];
struct
{
uint8_t RTOFlags;
int16_t Tiles;
struct
{
int8_t Sprite;
uint8_t Line;
} OBJ[32];
} OBJLines [SNES_HEIGHT_EXTENDED];
uint8_t r212c;
uint8_t r212d;
uint8_t r2130;
uint8_t r2131;
bool Pseudo;
};
struct SLineData
{
struct
{
uint16_t VOffset;
uint16_t HOffset;
} BG [4];
};
#define H_FLIP 0x4000
#define V_FLIP 0x8000
#define BLANK_TILE 2
typedef struct
{
uint32_t TileSize;
uint32_t BitShift;
uint32_t TileShift;
uint32_t TileAddress;
uint32_t NameSelect;
uint32_t SCBase;
uint32_t StartPalette;
uint32_t PaletteShift;
uint32_t PaletteMask;
uint8_t* Buffer;
uint8_t* Buffered;
bool DirectColourMode;
} SBG;
struct SLineMatrixData
{
short MatrixA;
short MatrixB;
short MatrixC;
short MatrixD;
short CentreX;
short CentreY;
};
extern uint32_t odd_high [4][16];
extern uint32_t odd_low [4][16];
extern uint32_t even_high [4][16];
extern uint32_t even_low [4][16];
extern SBG BG;
extern uint16_t DirectColourMaps [8][256];
extern uint8_t 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_t *) (s))
#define WRITE_2BYTES(s, d) *(uint16_t *) (s) = (d)
#else
#define READ_2BYTES(s) (*(uint8_t *) (s) | (*((uint8_t *) (s) + 1) << 8))
#define WRITE_2BYTES(s, d) *(uint8_t *) (s) = (d), \
*((uint8_t *) (s) + 1) = (d) >> 8
#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
static inline uint16_t COLOR_ADD(uint16_t, uint16_t);
static inline uint16_t COLOR_ADD(uint16_t C1, uint16_t C2)
{
if (C1 == 0)
return C2;
else if (C2 == 0)
return C1;
else
return 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]
#elif !defined(NEW_COLOUR_BLENDING)
#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))
#else
inline uint16_t COLOR_SUB(uint16_t, uint16_t);
inline uint16_t COLOR_SUB(uint16_t C1, uint16_t C2)
{
uint16_t mC1, mC2, v = 0;
mC1 = C1 & FIRST_COLOR_MASK;
mC2 = C2 & FIRST_COLOR_MASK;
if (mC1 > mC2) v += (mC1 - mC2);
mC1 = C1 & SECOND_COLOR_MASK;
mC2 = C2 & SECOND_COLOR_MASK;
if (mC1 > mC2) v += (mC1 - mC2);
mC1 = C1 & THIRD_COLOR_MASK;
mC2 = C2 & THIRD_COLOR_MASK;
if (mC1 > mC2) v += (mC1 - mC2);
return v;
}
#endif
#define COLOR_SUB1_2(C1, C2) \
GFX.ZERO [(((C1) | RGB_HI_BITS_MASKx2) - \
((C2) & RGB_REMOVE_LOW_BITS_MASK)) >> 1]
typedef void (*NormalTileRenderer)(uint32_t Tile, int32_t Offset,
uint32_t StartLine, uint32_t LineCount);
typedef void (*ClippedTileRenderer)(uint32_t Tile, int32_t Offset,
uint32_t StartPixel, uint32_t Width,
uint32_t StartLine, uint32_t LineCount);
typedef void (*LargePixelRenderer)(uint32_t Tile, int32_t Offset,
uint32_t StartPixel, uint32_t Pixels,
uint32_t StartLine, uint32_t LineCount);
#endif
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