snes9x/gfx.h

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/*****************************************************************************\
Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
This file is licensed under the Snes9x License.
For further information, consult the LICENSE file in the root directory.
\*****************************************************************************/
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#ifndef _GFX_H_
#define _GFX_H_
struct SGFX
{
uint16 *Screen;
uint16 *SubScreen;
uint8 *ZBuffer;
uint8 *SubZBuffer;
uint32 Pitch;
uint32 ScreenSize;
uint16 *S;
uint8 *DB;
uint16 *X2;
uint16 *ZERO;
uint32 RealPPL; // true PPL of Screen buffer
uint32 PPL; // number of pixels on each of Screen buffer
uint32 LinesPerTile; // number of lines in 1 tile (4 or 8 due to interlace)
uint16 *ScreenColors; // screen colors for rendering main
uint16 *RealScreenColors; // screen colors, ignoring color window clipping
uint8 Z1; // depth for comparison
uint8 Z2; // depth to save
uint32 FixedColour;
uint8 DoInterlace;
uint8 InterlaceFrame;
uint32 StartY;
uint32 EndY;
bool8 ClipColors;
uint8 OBJWidths[128];
uint8 OBJVisibleTiles[128];
struct ClipData *Clip;
struct
{
uint8 RTOFlags;
int16 Tiles;
struct
{
int8 Sprite;
uint8 Line;
} OBJ[32];
} OBJLines[SNES_HEIGHT_EXTENDED];
#ifdef GFX_MULTI_FORMAT
uint32 PixelFormat;
uint32 (*BuildPixel) (uint32, uint32, uint32);
uint32 (*BuildPixel2) (uint32, uint32, uint32);
void (*DecomposePixel) (uint32, uint32 &, uint32 &, uint32 &);
#endif
void (*DrawBackdropMath) (uint32, uint32, uint32);
void (*DrawBackdropNomath) (uint32, uint32, uint32);
void (*DrawTileMath) (uint32, uint32, uint32, uint32);
void (*DrawTileNomath) (uint32, uint32, uint32, uint32);
void (*DrawClippedTileMath) (uint32, uint32, uint32, uint32, uint32, uint32);
void (*DrawClippedTileNomath) (uint32, uint32, uint32, uint32, uint32, uint32);
void (*DrawMosaicPixelMath) (uint32, uint32, uint32, uint32, uint32, uint32);
void (*DrawMosaicPixelNomath) (uint32, uint32, uint32, uint32, uint32, uint32);
void (*DrawMode7BG1Math) (uint32, uint32, int);
void (*DrawMode7BG1Nomath) (uint32, uint32, int);
void (*DrawMode7BG2Math) (uint32, uint32, int);
void (*DrawMode7BG2Nomath) (uint32, uint32, int);
const char *InfoString;
uint32 InfoStringTimeout;
char FrameDisplayString[256];
};
struct SBG
{
uint8 (*ConvertTile) (uint8 *, uint32, uint32);
uint8 (*ConvertTileFlip) (uint8 *, uint32, uint32);
uint32 TileSizeH;
uint32 TileSizeV;
uint32 OffsetSizeH;
uint32 OffsetSizeV;
uint32 TileShift;
uint32 TileAddress;
uint32 NameSelect;
uint32 SCBase;
uint32 StartPalette;
uint32 PaletteShift;
uint32 PaletteMask;
uint8 EnableMath;
uint8 InterlaceLine;
uint8 *Buffer;
uint8 *BufferFlip;
uint8 *Buffered;
uint8 *BufferedFlip;
bool8 DirectColourMode;
};
struct SLineData
{
struct
{
uint16 VOffset;
uint16 HOffset;
} BG[4];
};
struct SLineMatrixData
{
short MatrixA;
short MatrixB;
short MatrixC;
short MatrixD;
short CentreX;
short CentreY;
short M7HOFS;
short M7VOFS;
};
extern uint16 BlackColourMap[256];
extern uint16 DirectColourMaps[8][256];
extern uint8 mul_brightness[16][32];
extern struct SBG BG;
extern struct SGFX GFX;
#define H_FLIP 0x4000
#define V_FLIP 0x8000
#define BLANK_TILE 2
#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)
#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))
#define COLOR_SUB1_2(C1, C2) \
GFX.ZERO[(((C1) | RGB_HI_BITS_MASKx2) - \
((C2) & RGB_REMOVE_LOW_BITS_MASK)) >> 1]
inline uint16 COLOR_SUB (uint16 C1, uint16 C2)
{
uint16 mC1, mC2, v = ALPHA_BITS_MASK;
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);
}
void S9xStartScreenRefresh (void);
void S9xEndScreenRefresh (void);
void S9xUpdateScreen (void);
void S9xBuildDirectColourMaps (void);
void RenderLine (uint8);
void S9xComputeClipWindows (void);
void S9xDisplayChar (uint16 *, uint8);
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void S9xGraphicsScreenResize (void);
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// called automatically unless Settings.AutoDisplayMessages is false
void S9xDisplayMessages (uint16 *, int, int, int, int);
#ifdef GFX_MULTI_FORMAT
bool8 S9xSetRenderPixelFormat (int);
#endif
// external port interface which must be implemented or initialised for each port
bool8 S9xGraphicsInit (void);
void S9xGraphicsDeinit (void);
bool8 S9xInitUpdate (void);
bool8 S9xDeinitUpdate (int, int);
bool8 S9xContinueUpdate (int, int);
void S9xReRefresh (void);
void S9xSetPalette (void);
void S9xSyncSpeed (void);
// called instead of S9xDisplayString if set to non-NULL
extern void (*S9xCustomDisplayString) (const char *, int, int, bool, int type);
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#endif