+/*
+ * mode4/SMS renderer
+ * (C) notaz, 2009-2010
+ *
+ * This work is licensed under the terms of MAME license.
+ * See COPYING file in the top-level directory.
+ */
/*
* TODO:
* - TMS9918 modes?
pd[x] = pal|t; \
}
-static int TileNormM4(int sx, int addr, int pal)
+static void TileNormM4(int sx, unsigned int pack, int pal)
{
- unsigned char *pd = HighCol + sx;
- unsigned int pack, t;
-
- pack = *(unsigned int *)(Pico.vram + addr); /* Get 4 bitplanes / 8 pixels */
- if (pack)
- {
- PLANAR_PIXEL(0, 0)
- PLANAR_PIXEL(1, 1)
- PLANAR_PIXEL(2, 2)
- PLANAR_PIXEL(3, 3)
- PLANAR_PIXEL(4, 4)
- PLANAR_PIXEL(5, 5)
- PLANAR_PIXEL(6, 6)
- PLANAR_PIXEL(7, 7)
- return 0;
- }
+ unsigned char *pd = Pico.est.HighCol + sx;
+ unsigned int t;
- return 1; /* Tile blank */
+ PLANAR_PIXEL(0, 0)
+ PLANAR_PIXEL(1, 1)
+ PLANAR_PIXEL(2, 2)
+ PLANAR_PIXEL(3, 3)
+ PLANAR_PIXEL(4, 4)
+ PLANAR_PIXEL(5, 5)
+ PLANAR_PIXEL(6, 6)
+ PLANAR_PIXEL(7, 7)
}
-static int TileFlipM4(int sx,int addr,int pal)
+static void TileFlipM4(int sx, unsigned int pack, int pal)
{
- unsigned char *pd = HighCol + sx;
- unsigned int pack, t;
-
- pack = *(unsigned int *)(Pico.vram + addr); /* Get 4 bitplanes / 8 pixels */
- if (pack)
- {
- PLANAR_PIXEL(0, 7)
- PLANAR_PIXEL(1, 6)
- PLANAR_PIXEL(2, 5)
- PLANAR_PIXEL(3, 4)
- PLANAR_PIXEL(4, 3)
- PLANAR_PIXEL(5, 2)
- PLANAR_PIXEL(6, 1)
- PLANAR_PIXEL(7, 0)
- return 0;
- }
+ unsigned char *pd = Pico.est.HighCol + sx;
+ unsigned int t;
- return 1; /* Tile blank */
+ PLANAR_PIXEL(0, 7)
+ PLANAR_PIXEL(1, 6)
+ PLANAR_PIXEL(2, 5)
+ PLANAR_PIXEL(3, 4)
+ PLANAR_PIXEL(4, 3)
+ PLANAR_PIXEL(5, 2)
+ PLANAR_PIXEL(6, 1)
+ PLANAR_PIXEL(7, 0)
}
static void draw_sprites(int scanline)
struct PicoVideo *pv = &Pico.video;
unsigned int sprites_addr[8];
unsigned int sprites_x[8];
+ unsigned int pack;
unsigned char *sat;
int xoff = 8; // relative to HighCol, which is (screen - 8)
int sprite_base, addr_mask;
if (pv->reg[0] & 8)
xoff = 0;
- sat = (unsigned char *)Pico.vram + ((pv->reg[5] & 0x7e) << 7);
+ sat = (unsigned char *)PicoMem.vram + ((pv->reg[5] & 0x7e) << 7);
if (pv->reg[1] & 2) {
addr_mask = 0xfe; h = 16;
} else {
}
sprite_base = (pv->reg[6] & 4) << (13-2-1);
- for (i = s = 0; i < 64 && s < 8; i++)
+ for (i = s = 0; i < 64; i++)
{
int y;
y = sat[i] + 1;
break;
if (y + h <= scanline || scanline < y)
continue; // not on this line
+ if (s >= 8) {
+ pv->status |= SR_SOVR;
+ break;
+ }
sprites_x[s] = xoff + sat[0x80 + i*2];
sprites_addr[s] = sprite_base + ((sat[0x80 + i*2 + 1] & addr_mask) << (5-1)) +
s++;
}
+ // really half-assed but better than nothing
+ if (s > 1)
+ pv->status |= SR_C;
+
// now draw all sprites backwards
- for (--s; s >= 0; s--)
- TileNormM4(sprites_x[s], sprites_addr[s], 0x10);
+ for (--s; s >= 0; s--) {
+ pack = *(unsigned int *)(PicoMem.vram + sprites_addr[s]);
+ TileNormM4(sprites_x[s], pack, 0x10);
+ }
}
// tilex_ty_prio merged to reduce register pressure
// Draw tiles across screen:
for (; cells > 0; dx += 8, tilex_ty_prio++, cells--)
{
- int code, zero;
+ unsigned int pack;
+ int code;
code = nametab[tilex_ty_prio & 0x1f];
if (code == blank)
pal = (code>>7) & 0x10;
}
- if (code&0x0200) zero = TileFlipM4(dx, addr, pal);
- else zero = TileNormM4(dx, addr, pal);
-
- if (zero)
- blank = code; // We know this tile is blank now
+ pack = *(unsigned int *)(PicoMem.vram + addr); /* Get 4 bitplanes / 8 pixels */
+ if (pack == 0) {
+ blank = code;
+ continue;
+ }
+ if (code & 0x0200) TileFlipM4(dx, pack, pal);
+ else TileNormM4(dx, pack, pal);
}
}
line -= 224;
// Find name table:
- nametab = Pico.vram;
+ nametab = PicoMem.vram;
nametab += (pv->reg[2] & 0x0e) << (10-1);
nametab += (line>>3) << (6-1);
dx += cellskip << 3;
// low priority tiles
- if (PicoDrawMask & PDRAW_LAYERB_ON)
+ if (!(pv->debug_p & PVD_KILL_B))
draw_strip(nametab, dx, cells, tilex | 0x0000 | (ty << 16));
// sprites
- if (PicoDrawMask & PDRAW_SPRITES_LOW_ON)
+ if (!(pv->debug_p & PVD_KILL_S_LO))
draw_sprites(scanline);
// high priority tiles (use virtual layer switch just for fun)
- if (PicoDrawMask & PDRAW_LAYERA_ON)
+ if (!(pv->debug_p & PVD_KILL_A))
draw_strip(nametab, dx, cells, tilex | 0x1000 | (ty << 16));
if (pv->reg[0] & 0x20)
// first column masked
- ((int *)HighCol)[2] = ((int *)HighCol)[3] = 0xe0e0e0e0;
+ ((int *)Pico.est.HighCol)[2] = ((int *)Pico.est.HighCol)[3] = 0xe0e0e0e0;
}
void PicoFrameStartMode4(void)
int lines = 192;
skip_next_line = 0;
screen_offset = 24;
- rendstatus = PDRAW_32_COLS;
+ Pico.est.rendstatus = PDRAW_32_COLS;
if ((Pico.video.reg[0] & 6) == 6 && (Pico.video.reg[1] & 0x18)) {
if (Pico.video.reg[1] & 0x08) {
}
}
- if (rendstatus != rendstatus_old || lines != rendlines) {
- rendstatus_old = rendstatus;
- rendlines = lines;
+ if (Pico.est.rendstatus != rendstatus_old || lines != rendlines) {
emu_video_mode_change(screen_offset, lines, 1);
+ rendstatus_old = Pico.est.rendstatus;
+ rendlines = lines;
}
- DrawLineDest = (char *)DrawLineDestBase + screen_offset * DrawLineDestIncrement;
+ Pico.est.DrawLineDest = (char *)DrawLineDestBase + screen_offset * DrawLineDestIncrement;
}
void PicoLineMode4(int line)
skip_next_line = PicoScanBegin(line + screen_offset);
// Draw screen:
- BackFill(Pico.video.reg[7] & 0x0f, 0);
+ BackFill(Pico.video.reg[7] & 0x0f, 0, &Pico.est);
if (Pico.video.reg[1] & 0x40)
DrawDisplayM4(line);
if (PicoScanEnd != NULL)
skip_next_line = PicoScanEnd(line + screen_offset);
- DrawLineDest = (char *)DrawLineDest + DrawLineDestIncrement;
+ Pico.est.DrawLineDest = (char *)Pico.est.DrawLineDest + DrawLineDestIncrement;
}
void PicoDoHighPal555M4(void)
{
- unsigned int *spal=(void *)Pico.cram;
- unsigned int *dpal=(void *)HighPal;
+ unsigned int *spal=(void *)PicoMem.cram;
+ unsigned int *dpal=(void *)Pico.est.HighPal;
unsigned int t;
int i;
t |= (t >> 4) & 0x08610861;
*dpal = t;
}
+ Pico.est.HighPal[0xe0] = 0;
}
static void FinalizeLineRGB555M4(int line)
// standard FinalizeLine can finish it for us,
// with features like scaling and such
- FinalizeLine555(0, line);
+ FinalizeLine555(0, line, &Pico.est);
}
static void FinalizeLine8bitM4(int line)
{
- unsigned char *pd = DrawLineDest;
+ unsigned char *pd = Pico.est.DrawLineDest;
- if (!(PicoOpt & POPT_DIS_32C_BORDER))
+ if (!(PicoIn.opt & POPT_DIS_32C_BORDER))
pd += 32;
- memcpy32((int *)pd, (int *)(HighCol+8), 256/4);
+ memcpy(pd, Pico.est.HighCol + 8, 256);
}
void PicoDrawSetOutputMode4(pdso_t which)
}
}
+// vim:shiftwidth=2:ts=2:expandtab
notaz.gp2x.de / picodrive.git / blobdiff