1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
#include "../copyright"
#ifndef _GFX_H_
#define _GFX_H_
#include "port.h"
#include "ppu.h"
#include "snes9x.h"
#include <retro_inline.h>
void S9xStartScreenRefresh(void);
void S9xDrawScanLine(uint8_t Line);
void S9xEndScreenRefresh(void);
void S9xSetupOBJ(void);
void S9xUpdateScreen(void);
void RenderLine(uint8_t line);
void S9xBuildDirectColourMaps(void);
bool S9xInitGFX(void);
void S9xDeinitGFX(void);
typedef struct
{
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;
int32_t Delta;
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;
uint8_t* DB;
ptrdiff_t DepthDelta;
uint8_t Z1; /* Depth for comparison */
uint8_t Z2; /* Depth to save */
uint32_t FixedColour;
uint32_t StartY;
uint32_t EndY;
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;
} SGFX;
/* External port interface which must be implemented or initialised for each port. */
extern SGFX GFX;
typedef struct
{
struct
{
uint16_t VOffset;
uint16_t HOffset;
} BG [4];
} SLineData;
#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;
typedef struct
{
int16_t MatrixA;
int16_t MatrixB;
int16_t MatrixC;
int16_t MatrixD;
int16_t CentreX;
int16_t CentreY;
} SLineMatrixData;
extern uint32_t even_high [4][16];
extern uint32_t even_low [4][16];
extern uint32_t odd_high [4][16];
extern uint32_t odd_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(dword) dword = ((((dword) & 0x000000ff) << 24) \
| (((dword) & 0x0000ff00) << 8) \
| (((dword) & 0x00ff0000) >> 8) \
| (((dword) & 0xff000000) >> 24))
#ifdef FAST_LSB_WORD_ACCESS
#define READ_2BYTES(s) (*(uint16_t *) (s))
#define WRITE_2BYTES(s, d) *(uint16_t *) (s) = (d)
#elif defined(MSB_FIRST)
#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
#else
#define READ_2BYTES(s) (*(uint16_t *) (s))
#define WRITE_2BYTES(s, d) *(uint16_t *) (s) = (d)
#endif
#define SUB_SCREEN_DEPTH 0
#define MAIN_SCREEN_DEPTH 32
static INLINE uint16_t COLOR_ADD(uint16_t C1, uint16_t 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_t retval = (rb & (RED_MASK | BLUE_MASK)) | (g & GREEN_MASK) | rgbsaturate;
#if GREEN_SHIFT_BITS == 6
retval |= (retval & 0x0400) >> 5;
#endif
return retval;
}
static INLINE uint16_t COLOR_ADD1_2(uint16_t C1, uint16_t C2)
{
return ((((((C1)&RGB_REMOVE_LOW_BITS_MASK) + ((C2)&RGB_REMOVE_LOW_BITS_MASK)) >> 1) +
((C1) & (C2)&RGB_LOW_BITS_MASK)) |
ALPHA_BITS_MASK);
}
static INLINE uint16_t COLOR_SUB(uint16_t C1, uint16_t 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_t 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 INLINE uint16_t COLOR_SUB1_2(uint16_t C1, uint16_t C2)
{
return 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
|
