1 /***************************************************************************
2
3 vidhrdw.c
4
5 Functions to emulate the video hardware of the machine.
6
7 ***************************************************************************/
8 #include "driver.h"
9 #include "vidhrdw/generic.h"
10
11
12 static int palette_bank;
13
14
flstory_vh_convert_color_prom(unsigned char * palette,unsigned short * colortable,const unsigned char * color_prom)15 void flstory_vh_convert_color_prom(unsigned char *palette, unsigned short *colortable,const unsigned char *color_prom)
16 {
17 int i;
18
19
20 /* no color PROMs here, only RAM, but the gfx data is inverted so we */
21 /* cannot use the default lookup table */
22 for (i = 0;i < Machine->drv->color_table_len;i++)
23 colortable[i] = i ^ 0x0f;
24 }
25
26
27
flstory_vh_start(void)28 int flstory_vh_start(void)
29 {
30 paletteram = (unsigned char*)malloc(0x200);
31 paletteram_2 = (unsigned char*)malloc(0x200);
32 return generic_vh_start();
33 }
34
flstory_vh_stop(void)35 void flstory_vh_stop(void)
36 {
37 free(paletteram);
38 paletteram = 0;
39 free(paletteram_2);
40 paletteram_2 = 0;
41 generic_vh_stop();
42 }
43
44
45
WRITE_HANDLER(flstory_palette_w)46 WRITE_HANDLER( flstory_palette_w )
47 {
48 if (offset & 0x100)
49 paletteram_xxxxBBBBGGGGRRRR_split2_w((offset & 0xff) + (palette_bank << 8),data);
50 else
51 paletteram_xxxxBBBBGGGGRRRR_split1_w((offset & 0xff) + (palette_bank << 8),data);
52 }
53
WRITE_HANDLER(flstory_gfxctrl_w)54 WRITE_HANDLER( flstory_gfxctrl_w )
55 {
56 palette_bank = (data & 0x20) >> 5;
57 //logerror("%04x: gfxctrl = %02x\n",cpu_get_pc(),data);
58 }
59
60
61
62 /***************************************************************************
63
64 Draw the game screen in the given osd_bitmap.
65 Do NOT call osd_update_display() from this function, it will be called by
66 the main emulation engine.
67
68 ***************************************************************************/
flstory_vh_screenrefresh(struct osd_bitmap * bitmap,int full_refresh)69 void flstory_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh)
70 {
71 int offs;
72
73
74 if (palette_recalc())
75 memset(dirtybuffer,1,videoram_size);
76
77 for (offs = videoram_size - 2;offs >= 0;offs -= 2)
78 {
79 if (dirtybuffer[offs] || dirtybuffer[offs+1])
80 {
81 int sx,sy;
82
83
84 dirtybuffer[offs] = 0;
85 dirtybuffer[offs+1] = 0;
86
87 sx = (offs/2)%32;
88 sy = (offs/2)/32;
89
90 drawgfx(tmpbitmap,Machine->gfx[0],
91 videoram[offs] + ((videoram[offs + 1] & 0xc0) << 2) + 0xc00,
92 videoram[offs + 1] & 0x07,
93 videoram[offs + 1] & 0x08,1,
94 8*sx,8*sy,
95 &Machine->visible_area,TRANSPARENCY_NONE,0);
96 }
97 }
98
99 copybitmap(bitmap,tmpbitmap,0,0,0,0,&Machine->visible_area,TRANSPARENCY_NONE,0);
100
101 for (offs = 0;offs < spriteram_size;offs += 4)
102 {
103 int code,sx,sy,flipx,flipy;
104
105
106 code = spriteram[offs+2] + ((spriteram[offs+1] & 0x30) << 4);
107 sx = spriteram[offs+3];
108 sy = 240 - spriteram[offs+0];
109 flipx = spriteram[offs+1]&0x40;
110 flipy = spriteram[offs+1]&0x80;
111
112 drawgfx(bitmap,Machine->gfx[1],
113 code,
114 spriteram[offs+1] & 0x0f,
115 flipx,flipy,
116 sx,sy,
117 &Machine->visible_area,TRANSPARENCY_PEN,0);
118 /* wrap around */
119 if (sx > 240)
120 drawgfx(bitmap,Machine->gfx[1],
121 code,
122 spriteram[offs+1] & 0x0f,
123 flipx,flipy,
124 sx-256,sy,
125 &Machine->visible_area,TRANSPARENCY_PEN,0);
126 }
127
128 /* redraw chars with priority over sprites */
129 for (offs = videoram_size - 2;offs >= 0;offs -= 2)
130 {
131 if (videoram[offs + 1] & 0x20)
132 {
133 int sx,sy;
134
135
136 sx = (offs/2)%32;
137 sy = (offs/2)/32;
138
139 drawgfx(bitmap,Machine->gfx[0],
140 videoram[offs] + ((videoram[offs + 1] & 0xc0) << 2) + 0xc00,
141 videoram[offs + 1] & 0x07,
142 videoram[offs + 1] & 0x08,1,
143 8*sx,8*sy,
144 &Machine->visible_area,TRANSPARENCY_PEN,0);
145 }
146 }
147 }
148