| 1 | #include "../pico_int.h" |
| 2 | |
| 3 | static void convert_pal555(int invert_prio) |
| 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; |
| 10 | unsigned int inv = 0; |
| 11 | int i; |
| 12 | |
| 13 | if (invert_prio) |
| 14 | inv = 0x00200020; |
| 15 | |
| 16 | // place prio to LS green bit |
| 17 | for (i = 0x100/2; i > 0; i--, ps++, pd++) { |
| 18 | unsigned int t = *ps; |
| 19 | *pd = (((t & m1) << 11) | ((t & m2) << 1) | ((t & m3) >> 10)) ^ inv; |
| 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; |
| 30 | unsigned short *dram, *ps, cram0; |
| 31 | int i; |
| 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 | |
| 42 | if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 0) |
| 43 | return; // blanking |
| 44 | |
| 45 | // XXX: how is 32col mode hadled by real hardware? |
| 46 | if (!(Pico.video.reg[12] & 1)) |
| 47 | return; |
| 48 | |
| 49 | if (!(PicoDrawMask & PDRAW_32X_ON)) |
| 50 | return; |
| 51 | |
| 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 | |
| 71 | if (Pico32x.dirty_pal) |
| 72 | convert_pal555(Pico32x.vdp_regs[0] & P32XV_PRI); |
| 73 | |
| 74 | if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 1) { // Packed Pixel Mode |
| 75 | unsigned short t; |
| 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 | } |
| 85 | else { // Run Length Mode |
| 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 | } |
| 93 | } |
| 94 | } |
| 95 | |