snes9x/gfx.h

226 lines
6.2 KiB
C

/*****************************************************************************\
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.
\*****************************************************************************/
#ifndef _GFX_H_
#define _GFX_H_
#include "port.h"
struct SGFX
{
uint16 *Screen;
uint16 *SubScreen;
uint8 *ZBuffer;
uint8 *SubZBuffer;
uint32 Pitch;
uint32 ScreenSize;
uint16 *S;
uint8 *DB;
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];
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 uint8 brightness_cap[64];
extern struct SBG BG;
extern struct SGFX GFX;
#define H_FLIP 0x4000
#define V_FLIP 0x8000
#define BLANK_TILE 2
struct COLOR_ADD
{
static alwaysinline uint16 fn(uint16 C1, uint16 C2)
{
const int RED_MASK = 0x1F << RED_SHIFT_BITS;
const int GREEN_MASK = 0x1F << GREEN_SHIFT_BITS;
const int BLUE_MASK = 0x1F;
int rb = C1 & (RED_MASK | BLUE_MASK);
rb += C2 & (RED_MASK | BLUE_MASK);
int rbcarry = rb & ((0x20 << RED_SHIFT_BITS) | (0x20 << 0));
int g = (C1 & (GREEN_MASK)) + (C2 & (GREEN_MASK));
int rgbsaturate = (((g & (0x20 << GREEN_SHIFT_BITS)) | rbcarry) >> 5) * 0x1f;
uint16 retval = (rb & (RED_MASK | BLUE_MASK)) | (g & GREEN_MASK) | rgbsaturate;
#if GREEN_SHIFT_BITS == 6
retval |= (retval & 0x0400) >> 5;
#endif
return retval;
}
static alwaysinline uint16 fn1_2(uint16 C1, uint16 C2)
{
return ((((C1 & RGB_REMOVE_LOW_BITS_MASK) +
(C2 & RGB_REMOVE_LOW_BITS_MASK)) >> 1) +
(C1 & C2 & RGB_LOW_BITS_MASK)) | ALPHA_BITS_MASK;
}
};
struct COLOR_ADD_BRIGHTNESS
{
static alwaysinline uint16 fn(uint16 C1, uint16 C2)
{
return ((brightness_cap[ (C1 >> RED_SHIFT_BITS) + (C2 >> RED_SHIFT_BITS) ] << RED_SHIFT_BITS) |
(brightness_cap[((C1 >> GREEN_SHIFT_BITS) & 0x1f) + ((C2 >> GREEN_SHIFT_BITS) & 0x1f)] << GREEN_SHIFT_BITS) |
// Proper 15->16bit color conversion moves the high bit of green into the low bit.
#if GREEN_SHIFT_BITS == 6
((brightness_cap[((C1 >> 6) & 0x1f) + ((C2 >> 6) & 0x1f)] & 0x10) << 1) |
#endif
(brightness_cap[ (C1 & 0x1f) + (C2 & 0x1f)] ));
}
static alwaysinline uint16 fn1_2(uint16 C1, uint16 C2)
{
return COLOR_ADD::fn1_2(C1, C2);
}
};
struct COLOR_SUB
{
static alwaysinline uint16 fn(uint16 C1, uint16 C2)
{
int rb1 = (C1 & (THIRD_COLOR_MASK | FIRST_COLOR_MASK)) | ((0x20 << 0) | (0x20 << RED_SHIFT_BITS));
int rb2 = C2 & (THIRD_COLOR_MASK | FIRST_COLOR_MASK);
int rb = rb1 - rb2;
int rbcarry = rb & ((0x20 << RED_SHIFT_BITS) | (0x20 << 0));
int g = ((C1 & (SECOND_COLOR_MASK)) | (0x20 << GREEN_SHIFT_BITS)) - (C2 & (SECOND_COLOR_MASK));
int rgbsaturate = (((g & (0x20 << GREEN_SHIFT_BITS)) | rbcarry) >> 5) * 0x1f;
uint16 retval = ((rb & (THIRD_COLOR_MASK | FIRST_COLOR_MASK)) | (g & SECOND_COLOR_MASK)) & rgbsaturate;
#if GREEN_SHIFT_BITS == 6
retval |= (retval & 0x0400) >> 5;
#endif
return retval;
}
static alwaysinline uint16 fn1_2(uint16 C1, uint16 C2)
{
return GFX.ZERO[((C1 | RGB_HI_BITS_MASKx2) -
(C2 & RGB_REMOVE_LOW_BITS_MASK)) >> 1];
}
};
void S9xStartScreenRefresh (void);
void S9xEndScreenRefresh (void);
void S9xBuildDirectColourMaps (void);
void RenderLine (uint8);
void S9xComputeClipWindows (void);
void S9xDisplayChar (uint16 *, uint8);
void S9xGraphicsScreenResize (void);
// called automatically unless Settings.AutoDisplayMessages is false
void S9xDisplayMessages (uint16 *, int, int, int, int);
// 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);
#endif