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1 | #include "../pico_int.h" |
2 | |
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3 | static void convert_pal555(int invert_prio) |
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4 | { |
5 | unsigned int *ps = (void *)Pico32xMem->pal; |
6 | unsigned int *pd = (void *)Pico32xMem->pal_native; |
7 | unsigned int m1 = 0x001f001f; |
8 | unsigned int m2 = 0x03e003e0; |
9 | unsigned int m3 = 0xfc00fc00; |
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10 | unsigned int inv = 0; |
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11 | int i; |
12 | |
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13 | if (invert_prio) |
14 | inv = 0x00200020; |
15 | |
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16 | // place prio to LS green bit |
17 | for (i = 0x100/2; i > 0; i--, ps++, pd++) { |
18 | unsigned int t = *ps; |
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19 | *pd = (((t & m1) << 11) | ((t & m2) << 1) | ((t & m3) >> 10)) ^ inv; |
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20 | } |
21 | |
22 | Pico32x.dirty_pal = 0; |
23 | } |
24 | |
25 | void FinalizeLine32xRGB555(int sh, int line) |
26 | { |
27 | unsigned short *pd = DrawLineDest; |
28 | unsigned short *pal = Pico32xMem->pal_native; |
29 | unsigned char *pb = HighCol + 8; |
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30 | unsigned short *dram, *ps, cram0; |
31 | int i; |
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32 | |
33 | // this is a bit hackish: |
34 | // we swap cram color 0 with color that is used for background, |
35 | // as bg is forced to 0 when we do 32X |
36 | cram0 = Pico.cram[0]; |
37 | Pico.cram[0] = Pico.cram[Pico.video.reg[7] & 0x3f]; |
38 | |
39 | FinalizeLineRGB555(sh, line); |
40 | Pico.cram[0] = cram0; |
41 | |
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42 | if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 0) |
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43 | return; // blanking |
44 | |
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45 | // XXX: how is 32col mode hadled by real hardware? |
46 | if (!(Pico.video.reg[12] & 1)) |
47 | return; |
48 | |
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49 | if (!(PicoDrawMask & PDRAW_32X_ON)) |
50 | return; |
51 | |
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52 | dram = (void *)Pico32xMem->dram[Pico32x.vdp_regs[0x0a/2] & P32XV_FS]; |
53 | ps = dram + dram[line]; |
54 | |
55 | if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 2) { // Direct Color Mode |
56 | int inv = (Pico32x.vdp_regs[0] & P32XV_PRI) ? 0x8000 : 0; |
57 | unsigned int m1 = 0x001f001f; |
58 | unsigned int m2 = 0x03e003e0; |
59 | unsigned int m3 = 0xfc00fc00; |
60 | |
61 | for (i = 320; i > 0; i--, ps++, pd++, pb++) { |
62 | unsigned short t = *ps; |
63 | if (*pb != 0 && !((t ^ inv) & 0x8000)) |
64 | continue; |
65 | |
66 | *pd = ((t & m1) << 11) | ((t & m2) << 1) | ((t & m3) >> 10); |
67 | } |
68 | return; |
69 | } |
70 | |
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71 | if (Pico32x.dirty_pal) |
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72 | convert_pal555(Pico32x.vdp_regs[0] & P32XV_PRI); |
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73 | |
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74 | if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 1) { // Packed Pixel Mode |
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75 | unsigned short t; |
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76 | for (i = 320/2; i > 0; i--, ps++, pd += 2, pb += 2) { |
77 | t = pal[*ps >> 8]; |
78 | if (pb[0] == 0 || (t & 0x20)) |
79 | pd[0] = t; |
80 | t = pal[*ps & 0xff]; |
81 | if (pb[1] == 0 || (t & 0x20)) |
82 | pd[1] = t; |
83 | } |
84 | } |
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85 | else { // Run Length Mode |
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86 | unsigned short len, t; |
87 | for (i = 320; i > 0; ps++) { |
88 | t = pal[*ps & 0xff]; |
89 | for (len = (*ps >> 8) + 1; len > 0 && i > 0; len--, i--, pd++, pb++) |
90 | if (*pb == 0 || (t & 0x20)) |
91 | *pd = t; |
92 | } |
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93 | } |
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94 | } |
95 | |