some support for vdp debug reg

[picodrive.git] / pico / mode4.c

diff --git a/pico/mode4.c b/pico/mode4.c
index 095250f..bda1188 100644 (file)
--- a/pico/mode4.c
+++ b/pico/mode4.c
@@ -1,3 +1,10 @@
+/*
+ * 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?
@@ -8,7 +15,7 @@
  */
 #include "pico_int.h"
 
-static void (*FinalizeLineM4)(void);
+static void (*FinalizeLineM4)(int line);
 static int skip_next_line;
 static int screen_offset;
 
@@ -21,7 +28,7 @@ static int screen_offset;
 
 static int TileNormM4(int sx, int addr, int pal)
 {
-  unsigned char *pd = HighCol + sx;
+  unsigned char *pd = Pico.est.HighCol + sx;
   unsigned int pack, t;
 
   pack = *(unsigned int *)(Pico.vram + addr); /* Get 4 bitplanes / 8 pixels */
@@ -43,7 +50,7 @@ static int TileNormM4(int sx, int addr, int pal)
 
 static int TileFlipM4(int sx,int addr,int pal)
 {
-  unsigned char *pd = HighCol + sx;
+  unsigned char *pd = Pico.est.HighCol + sx;
   unsigned int pack, t;
 
   pack = *(unsigned int *)(Pico.vram + addr); /* Get 4 bitplanes / 8 pixels */
@@ -172,36 +179,47 @@ static void DrawDisplayM4(int scanline)
   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_192LINES;
+  Pico.est.rendstatus = PDRAW_32_COLS;
+
   if ((Pico.video.reg[0] & 6) == 6 && (Pico.video.reg[1] & 0x18)) {
-    rendstatus &= ~PDRAW_192LINES;
     if (Pico.video.reg[1] & 0x08) {
       screen_offset = 0;
-      rendstatus |= PDRAW_240LINES;
+      lines = 240;
     }
-    else // it's 224 lines
+    else {
       screen_offset = 8;
+      lines = 224;
+    }
   }
+
+  if (Pico.est.rendstatus != rendstatus_old || lines != rendlines) {
+    emu_video_mode_change(screen_offset, lines, 1);
+    rendstatus_old = Pico.est.rendstatus;
+    rendlines = lines;
+  }
+
+  Pico.est.DrawLineDest = (char *)DrawLineDestBase + screen_offset * DrawLineDestIncrement;
 }
 
 void PicoLineMode4(int line)
@@ -215,21 +233,23 @@ 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 (FinalizeLineM4 != NULL)
-    FinalizeLineM4();
+    FinalizeLineM4(line);
 
   if (PicoScanEnd != NULL)
     skip_next_line = PicoScanEnd(line + screen_offset);
+
+  Pico.est.DrawLineDest = (char *)Pico.est.DrawLineDest + DrawLineDestIncrement;
 }
 
 void PicoDoHighPal555M4(void)
 {
   unsigned int *spal=(void *)Pico.cram;
-  unsigned int *dpal=(void *)HighPal;
+  unsigned int *dpal=(void *)Pico.est.HighPal;
   unsigned int t;
   int i;
 
@@ -247,41 +267,36 @@ void PicoDoHighPal555M4(void)
     t |= (t >> 4) & 0x08610861;
     *dpal = t;
   }
+  Pico.est.HighPal[0xe0] = 0;
 }
 
-static void FinalizeLineRGB555M4(void)
+static void FinalizeLineRGB555M4(int line)
 {
-  unsigned short *pd=DrawLineDest;
-  unsigned char  *ps=HighCol+8;
-  unsigned short *pal=HighPal;
-  int i;
-
   if (Pico.m.dirtyPal)
     PicoDoHighPal555M4();
 
-  if (!(PicoOpt & POPT_DIS_32C_BORDER))
-    pd += 32;
-
-  for (i = 256/4; i > 0; i--) {
-    *pd++ = pal[*ps++];
-    *pd++ = pal[*ps++];
-    *pd++ = pal[*ps++];
-    *pd++ = pal[*ps++];
-  }
+  // standard FinalizeLine can finish it for us,
+  // with features like scaling and such
+  FinalizeLine555(0, line, &Pico.est);
 }
 
-static void FinalizeLine8bitM4(void)
+static void FinalizeLine8bitM4(int line)
 {
-  memcpy32(DrawLineDest, (int *)(HighCol+8), 256/4);
+  unsigned char *pd = Pico.est.DrawLineDest;
+
+  if (!(PicoOpt & POPT_DIS_32C_BORDER))
+    pd += 32;
+
+  memcpy32((int *)pd, (int *)(Pico.est.HighCol+8), 256/4);
 }
 
-void PicoDrawSetColorFormatMode4(int which)
+void PicoDrawSetOutputMode4(pdso_t which)
 {
   switch (which)
   {
-    case 2: FinalizeLineM4 = FinalizeLine8bitM4; break;
-    case 1: FinalizeLineM4 = FinalizeLineRGB555M4; break;
-    default:FinalizeLineM4 = NULL; break;
+    case PDF_8BIT:   FinalizeLineM4 = FinalizeLine8bitM4; break;
+    case PDF_RGB555: FinalizeLineM4 = FinalizeLineRGB555M4; break;
+    default:         FinalizeLineM4 = NULL; break;
   }
 }