mirror of
https://github.com/RaySollium99/picodrive.git
synced 2025-09-05 15:27:46 -04:00
sms, basic gamegear support
This commit is contained in:
kub
parent
0df7401c02
commit
466fa07953
16 changed files with 451 additions and 214 deletions
117
pico/mode4.c
117
pico/mode4.c
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@ -141,6 +141,8 @@ static void DrawSpritesM4(int scanline)
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if (pv->reg[0] & 8)
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xoff = 0;
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xoff += line_offset;
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if ((Pico.m.hardware & 0x3) == 0x3)
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xoff -= 48; // GG LCD, adjust to center 160 px
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sat = (u8 *)PicoMem.vram + ((pv->reg[5] & 0x7e) << 7);
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if (pv->reg[1] & 2) {
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@ -164,10 +166,12 @@ static void DrawSpritesM4(int scanline)
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break;
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}
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sprites_x[s] = xoff + sat[MEM_LE2(0x80 + i*2)];
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sprites_addr[s] = sprite_base + ((sat[MEM_LE2(0x80 + i*2 + 1)] & addr_mask) << (5-1)) +
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((scanline - y) >> zoomed << (2-1));
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s++;
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if (xoff + sat[MEM_LE2(0x80 + i*2)] >= 0) {
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sprites_x[s] = xoff + sat[MEM_LE2(0x80 + i*2)];
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sprites_addr[s] = sprite_base + ((sat[MEM_LE2(0x80 + i*2 + 1)] & addr_mask) << (5-1)) +
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((scanline - y) >> zoomed << (2-1));
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s++;
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}
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}
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// really half-assed but better than nothing
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@ -296,9 +300,12 @@ static void DrawDisplayM4(int scanline)
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// low priority tiles
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if (!(pv->debug_p & PVD_KILL_B)) {
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if (pv->reg[0] & 0x80) {
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if ((Pico.m.hardware & 0x3) == 0x3) {
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// on GG render only the center 160 px
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DrawStripLowM4(nametab , dx | ((cells-12)<< 16),(tilex+6) | (ty << 16));
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} else if (pv->reg[0] & 0x80) {
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// vscroll disabled for rightmost 8 columns (e.g. Gauntlet)
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int dx2 = dx + (cells-8)*8, tilex2 = tilex + (cells-8), ty2 = scanline & 7;
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int dx2 = dx + (cells-8)*8, tilex2 = tilex + (cells-8), ty2 = scanline&7;
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DrawStripLowM4(nametab, dx | ((cells-8) << 16), tilex | (ty << 16));
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DrawStripLowM4(nametab2, dx2 | (8 << 16), tilex2 | (ty2 << 17));
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} else
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@ -311,8 +318,10 @@ static void DrawDisplayM4(int scanline)
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// high priority tiles (use virtual layer switch just for fun)
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if (!(pv->debug_p & PVD_KILL_A)) {
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if (pv->reg[0] & 0x80) {
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int dx2 = dx + (cells-8)*8, tilex2 = tilex + (cells-8), ty2 = scanline & 7;
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if ((Pico.m.hardware & 0x3) == 0x3) {
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DrawStripHighM4(nametab , dx | ((cells-12)<< 16),(tilex+6) | (ty << 16));
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} else if (pv->reg[0] & 0x80) {
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int dx2 = dx + (cells-8)*8, tilex2 = tilex + (cells-8), ty2 = scanline&7;
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DrawStripHighM4(nametab, dx | ((cells-8) << 16), tilex | (ty << 16));
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DrawStripHighM4(nametab2, dx2 | (8 << 16), tilex2 | (ty2 << 17));
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} else
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@ -451,20 +460,21 @@ static void DrawSpritesM2(int scanline)
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// now draw all sprites backwards
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for (--s; s >= 0; s--) {
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int x, w = (zoomed ? 16: 8);
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int x, c, w = (zoomed ? 16: 8);
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i = sprites_x[s];
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x = sat[MEM_LE2(i+1)] + xoff;
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if (sat[MEM_LE2(i+3)] & 0x80)
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x -= 32;
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c = sat[MEM_LE2(i+3)] & 0x0f;
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if (x > 0) {
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pack = PicoMem.vramb[MEM_LE2(sprites_addr[s])];
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if (zoomed) TileDoubleSprM2(x, pack, sat[MEM_LE2(i+3)] & 0xf);
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else TileNormSprM2(x, pack, sat[MEM_LE2(i+3)] & 0xf);
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if (zoomed) TileDoubleSprM2(x, pack, c);
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else TileNormSprM2(x, pack, c);
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}
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if((pv->reg[1] & 0x2) && (x+=w) > 0) {
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pack = PicoMem.vramb[MEM_LE2(sprites_addr[s]+0x10)];
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if (zoomed) TileDoubleSprM2(x, pack, sat[MEM_LE2(i+3)] & 0xf);
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else TileNormSprM2(x, pack, sat[MEM_LE2(i+3)] & 0xf);
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if (zoomed) TileDoubleSprM2(x, pack, c);
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else TileNormSprM2(x, pack, c);
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}
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}
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}
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@ -524,34 +534,45 @@ static void FinalizeLineRGB555SMS(int line);
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void PicoFrameStartSMS(void)
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{
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int lines = 192, columns = 256, coffs;
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int lines = 192, columns = 256, loffs, coffs;
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skip_next_line = 0;
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screen_offset = 24;
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loffs = screen_offset = 24; // 192 lines is really 224 with top/bottom bars
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Pico.est.rendstatus = PDRAW_32_COLS;
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switch ((Pico.video.reg[0]&0x06) | (Pico.video.reg[1]&0x18)) {
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// Copy LCD enable flag for easier handling
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Pico.m.hardware &= ~0x2;
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if (PicoIn.opt & POPT_EN_GG_LCD)
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Pico.m.hardware |= 0x2;
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if ((Pico.m.hardware & 0x3) == 0x3) {
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// GG LCD always has 160x144 regardless of settings
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screen_offset = 24; // nonetheless the vdp timing has 224 lines
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loffs = 48;
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lines = 144;
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columns = 160;
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} else switch ((Pico.video.reg[0]&0x06) | (Pico.video.reg[1]&0x18)) {
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// SMS2 only 224/240 line modes, e.g. Micro Machines
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case 0x06|0x08:
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screen_offset = 0;
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loffs = screen_offset = 0;
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lines = 240;
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break;
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case 0x06|0x10:
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screen_offset = 8;
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loffs = screen_offset = 8;
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lines = 224;
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break;
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}
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if (PicoIn.opt & POPT_EN_SOFTSCALE) {
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line_offset = 0;
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coffs = 0;
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columns = 320;
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} else
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line_offset = PicoIn.opt & POPT_DIS_32C_BORDER ? 0 : 32;
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coffs = PicoIn.opt & POPT_DIS_32C_BORDER ? 0:(320-columns)/2;
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line_offset = (PicoIn.opt & POPT_ALT_RENDERER ? coffs : 0);
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coffs = line_offset;
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if (FinalizeLineSMS == FinalizeLineRGB555SMS)
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line_offset = 0 /* done in FinalizeLine */;
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if (Pico.est.rendstatus != rendstatus_old || lines != rendlines) {
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emu_video_mode_change(screen_offset, lines, coffs, columns);
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emu_video_mode_change(loffs, lines, coffs, columns);
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rendstatus_old = Pico.est.rendstatus;
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rendlines = lines;
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}
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@ -562,14 +583,20 @@ void PicoFrameStartSMS(void)
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void PicoLineSMS(int line)
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{
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if (skip_next_line > 0) {
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skip_next_line--;
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int skip = skip_next_line;
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// GG LCD, render only visible part of screen
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if ((Pico.m.hardware & 0x3) == 0x3 && (line < 24 || line >= 24+144))
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goto norender;
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if (PicoScanBegin != NULL && skip == 0)
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skip = PicoScanBegin(line + screen_offset);
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if (skip) {
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skip_next_line = skip - 1;
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return;
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}
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if (PicoScanBegin != NULL)
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skip_next_line = PicoScanBegin(line + screen_offset);
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// Draw screen:
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BackFill(Pico.video.reg[7] & 0x0f, 0, &Pico.est);
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if (Pico.video.reg[1] & 0x40) {
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@ -583,19 +610,21 @@ void PicoLineSMS(int line)
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if (PicoScanEnd != NULL)
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skip_next_line = PicoScanEnd(line + screen_offset);
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norender:
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Pico.est.HighCol += HighColIncrement;
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Pico.est.DrawLineDest = (char *)Pico.est.DrawLineDest + DrawLineDestIncrement;
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}
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/* Fixed palette for TMS9918 modes */
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static u16 tmspal[32] = {
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0x00,0x00,0x08,0x0c,0x10,0x30,0x01,0x3c,0x02,0x03,0x05,0x0f,0x04,0x33,0x15,0x3f
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0x0000, 0x0000, 0x00a0, 0x00f0, 0x0500, 0x0f00, 0x0005, 0x0ff0,
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0x000a, 0x000f, 0x0055, 0x00ff, 0x0050, 0x0f0f, 0x0555, 0x0fff,
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};
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void PicoDoHighPal555SMS(void)
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{
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unsigned int *spal=(void *)PicoMem.cram;
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unsigned int *dpal=(void *)Pico.est.HighPal;
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u32 *spal=(void *)PicoMem.cram;
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u32 *dpal=(void *)Pico.est.HighPal;
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unsigned int t;
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int i;
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@ -603,21 +632,9 @@ void PicoDoHighPal555SMS(void)
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if (!(Pico.video.reg[0] & 0x4))
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spal = (u32 *)tmspal;
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/* cram is always stored as shorts, even though real hardware probably uses bytes */
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if (PicoIn.AHW & PAHW_SMS) for (i = 0x20/2; i > 0; i--, spal++, dpal++) {
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t = *spal;
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#if defined(USE_BGR555)
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t = ((t & 0x00030003)<< 3) | ((t & 0x000c000c)<<6) | ((t & 0x00300030)<<9);
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t |= (t >> 2) | ((t >> 4) & 0x04210421);
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#elif defined(USE_BGR565)
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t = ((t & 0x00030003)<< 3) | ((t & 0x000c000c)<<7) | ((t & 0x00300030)<<10);
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t |= (t >> 2) | ((t >> 4) & 0x08610861);
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#else
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t = ((t & 0x00030003)<<14) | ((t & 0x000c000c)<<7) | ((t & 0x00300030)>>1);
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t |= (t >> 2) | ((t >> 4) & 0x08610861);
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#endif
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*dpal = t;
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} else for (i = 0x20/2; i > 0; i--, spal++, dpal++) { // GG palette 4 bit/col
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/* SMS 6 bit cram data was already converted to MD/GG format by vdp write,
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* hence GG/SMS/TMS can all be handled the same here */
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for (i = 0x20/2; i > 0; i--, spal++, dpal++) {
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t = *spal;
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#if defined(USE_BGR555)
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t = ((t & 0x000f000f)<< 1) | ((t & 0x00f000f0)<<2) | ((t & 0x0f000f00)<<3);
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@ -646,15 +663,7 @@ static void FinalizeLineRGB555SMS(int line)
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static void FinalizeLine8bitSMS(int line)
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{
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u8 *pd = Pico.est.DrawLineDest + line_offset;
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u8 *ps = Pico.est.HighCol + line_offset + 8;
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if (DrawLineDestIncrement) {
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if (PicoIn.opt & POPT_EN_SOFTSCALE)
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rh_upscale_nn_4_5(pd, 320, ps, 256, 256, f_nop);
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else if (pd != ps)
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memcpy(pd, ps, 256);
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}
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FinalizeLine8bit(0, line, &Pico.est);
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}
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void PicoDrawSetOutputSMS(pdso_t which)
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