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https://github.com/RaySollium99/picodrive.git
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5e49c3a88d
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@774 be3aeb3a-fb24-0410-a615-afba39da0efa
65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
#include "../pico_int.h"
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static void convert_pal555(int invert_prio)
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{
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unsigned int *ps = (void *)Pico32xMem->pal;
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unsigned int *pd = (void *)Pico32xMem->pal_native;
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unsigned int m1 = 0x001f001f;
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unsigned int m2 = 0x03e003e0;
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unsigned int m3 = 0xfc00fc00;
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unsigned int inv = 0;
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int i;
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if (invert_prio)
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inv = 0x00200020;
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// place prio to LS green bit
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for (i = 0x100/2; i > 0; i--, ps++, pd++) {
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unsigned int t = *ps;
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*pd = (((t & m1) << 11) | ((t & m2) << 1) | ((t & m3) >> 10)) ^ inv;
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}
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Pico32x.dirty_pal = 0;
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}
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void FinalizeLine32xRGB555(int sh, int line)
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{
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unsigned short *pd = DrawLineDest;
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unsigned short *pal = Pico32xMem->pal_native;
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unsigned char *pb = HighCol + 8;
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unsigned short cram0;
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// this is a bit hackish:
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// we swap cram color 0 with color that is used for background,
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// as bg is forced to 0 when we do 32X
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cram0 = Pico.cram[0];
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Pico.cram[0] = Pico.cram[Pico.video.reg[7] & 0x3f];
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FinalizeLineRGB555(sh, line);
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Pico.cram[0] = cram0;
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if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 0)
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return; // blanking
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if (!(PicoDrawMask & PDRAW_32X_ON))
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return;
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if (Pico32x.dirty_pal)
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convert_pal555(Pico32x.vdp_regs[0] & P32XV_PRI);
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if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 1) {
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unsigned short *dram = (void *)Pico32xMem->dram[Pico32x.vdp_regs[0x0a/2] & P32XV_FS];
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unsigned short *ps = dram + dram[line];
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unsigned short t;
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int i;
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for (i = 320/2; i > 0; i--, ps++, pd += 2, pb += 2) {
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t = pal[*ps >> 8];
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if (pb[0] == 0 || (t & 0x20))
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pd[0] = t;
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t = pal[*ps & 0xff];
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if (pb[1] == 0 || (t & 0x20))
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pd[1] = t;
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}
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}
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}
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