Quake: attempt 2duke3d

Change-Id: I4285036e967d7f0722802d43cf2096c808ca5799

1 files changed, 478 insertions, 0 deletions

diff --git a/apps/plugins/sdl/progs/quake/vid_vga.c b/apps/plugins/sdl/progs/quake/vid_vga.c
new file mode 100644
index 0000000..6fbec9d
--- /dev/null
+++ b/apps/plugins/sdl/progs/quake/vid_vga.c
@@ -0,0 +1,478 @@
+/*
+Copyright (C) 1996-1997 Id Software, Inc.
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
+
+See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+//
+// vid_vga.c: VGA-specific DOS video stuff
+//
+
+// TODO: proper handling of page-swap failure
+
+#include <dos.h>
+
+#include "quakedef.h"
+#include "d_local.h"
+#include "dosisms.h"
+#include "vid_dos.h"
+#include <dpmi.h>
+
+extern regs_t regs;
+
+int		VGA_width, VGA_height, VGA_rowbytes, VGA_bufferrowbytes;
+byte	*VGA_pagebase;
+vmode_t	*VGA_pcurmode;
+
+static int		VGA_planar;
+static int		VGA_numpages;
+static int		VGA_buffersize;
+
+void	*vid_surfcache;
+int		vid_surfcachesize;
+
+int		VGA_highhunkmark;
+
+#include "vgamodes.h"
+
+#define NUMVIDMODES		(sizeof(vgavidmodes) / sizeof(vgavidmodes[0]))
+
+void VGA_UpdatePlanarScreen (void *srcbuffer);
+
+static byte	backingbuf[48*24];
+
+/*
+================
+VGA_BeginDirectRect
+================
+*/
+void VGA_BeginDirectRect (viddef_t *lvid, struct vmode_s *pcurrentmode, int x,
+	int y, byte *pbitmap, int width, int height)
+{
+	int		i, j, k, plane, reps, repshift;
+
+	if (!lvid->direct)
+		return;
+
+	if (lvid->aspect > 1.5)
+	{
+		reps = 2;
+		repshift = 1;
+	}
+	else
+	{
+		reps = 1;
+		repshift = 0;
+	}
+
+	if (pcurrentmode->planar)
+	{
+		for (plane=0 ; plane<4 ; plane++)
+		{
+		// select the correct plane for reading and writing
+			outportb (SC_INDEX, MAP_MASK);
+			outportb (SC_DATA, 1 << plane);
+			outportb (GC_INDEX, READ_MAP);
+			outportb (GC_DATA, plane);
+
+			for (i=0 ; i<(height << repshift) ; i += reps)
+			{
+				for (k=0 ; k<reps ; k++)
+				{
+					for (j=0 ; j<(width >> 2) ; j++)
+					{
+						backingbuf[(i + k) * 24 + (j << 2) + plane] =
+								lvid->direct[(y + i + k) * VGA_rowbytes +
+								(x >> 2) + j];
+						lvid->direct[(y + i + k) * VGA_rowbytes + (x>>2) + j] =
+								pbitmap[(i >> repshift) * 24 +
+								(j << 2) + plane];
+					}
+				}
+			}
+		}
+	}
+	else
+	{
+		for (i=0 ; i<(height << repshift) ; i += reps)
+		{
+			for (j=0 ; j<reps ; j++)
+			{
+				memcpy (&backingbuf[(i + j) * 24],
+						lvid->direct + x + ((y << repshift) + i + j) *
+						 VGA_rowbytes,
+						width);
+				memcpy (lvid->direct + x + ((y << repshift) + i + j) *
+						 VGA_rowbytes,
+						&pbitmap[(i >> repshift) * width],
+						width);
+			}
+		}
+	}
+}
+
+
+/*
+================
+VGA_EndDirectRect
+================
+*/
+void VGA_EndDirectRect (viddef_t *lvid, struct vmode_s *pcurrentmode, int x,
+	int y, int width, int height)
+{
+	int		i, j, k, plane, reps, repshift;
+
+	if (!lvid->direct)
+		return;
+
+	if (lvid->aspect > 1.5)
+	{
+		reps = 2;
+		repshift = 1;
+	}
+	else
+	{
+		reps = 1;
+		repshift = 0;
+	}
+
+	if (pcurrentmode->planar)
+	{
+		for (plane=0 ; plane<4 ; plane++)
+		{
+		// select the correct plane for writing
+			outportb (SC_INDEX, MAP_MASK);
+			outportb (SC_DATA, 1 << plane);
+
+			for (i=0 ; i<(height << repshift) ; i += reps)
+			{
+				for (k=0 ; k<reps ; k++)
+				{
+					for (j=0 ; j<(width >> 2) ; j++)
+					{
+						lvid->direct[(y + i + k) * VGA_rowbytes + (x>>2) + j] =
+								backingbuf[(i + k) * 24 + (j << 2) + plane];
+					}
+				}
+			}
+		}
+	}
+	else
+	{
+		for (i=0 ; i<(height << repshift) ; i += reps)
+		{
+			for (j=0 ; j<reps ; j++)
+			{
+				memcpy (lvid->direct + x + ((y << repshift) + i + j) *
+						 VGA_rowbytes,
+						&backingbuf[(i + j) * 24],
+						width);
+			}
+		}
+	}
+}
+
+
+/*
+================
+VGA_Init
+================
+*/
+void VGA_Init (void)
+{
+	int		i;
+
+// link together all the VGA modes
+	for (i=0 ; i<(NUMVIDMODES - 1) ; i++)
+	{
+		vgavidmodes[i].pnext = &vgavidmodes[i+1];
+	}
+
+// add the VGA modes at the start of the mode list
+	vgavidmodes[NUMVIDMODES-1].pnext = pvidmodes;
+	pvidmodes = &vgavidmodes[0];
+
+	numvidmodes += NUMVIDMODES;
+}
+
+
+/*
+================
+VGA_WaitVsync
+================
+*/
+void VGA_WaitVsync (void)
+{
+	while ((inportb (0x3DA) & 0x08) == 0)
+		;
+}
+
+
+/*
+================
+VGA_ClearVideoMem
+================
+*/
+void VGA_ClearVideoMem (int planar)
+{
+
+	if (planar)
+	{
+	// enable all planes for writing
+		outportb (SC_INDEX, MAP_MASK);
+		outportb (SC_DATA, 0x0F);
+	}
+
+	Q_memset (VGA_pagebase, 0, VGA_rowbytes * VGA_height);
+}
+
+/*
+================
+VGA_FreeAndAllocVidbuffer
+================
+*/
+qboolean VGA_FreeAndAllocVidbuffer (viddef_t *lvid, int allocnewbuffer)
+{
+	int		tsize, tbuffersize;
+
+	if (allocnewbuffer)
+	{
+	// alloc an extra line in case we want to wrap, and allocate the z-buffer
+		tbuffersize = (lvid->rowbytes * (lvid->height + 1)) +
+				(lvid->width * lvid->height * sizeof (*d_pzbuffer));
+	}
+	else
+	{
+	// just allocate the z-buffer
+		tbuffersize = lvid->width * lvid->height * sizeof (*d_pzbuffer);
+	}
+
+	tsize = D_SurfaceCacheForRes (lvid->width, lvid->height);
+
+	tbuffersize += tsize;
+
+// see if there's enough memory, allowing for the normal mode 0x13 pixel,
+// z, and surface buffers
+	if ((host_parms.memsize - tbuffersize + SURFCACHE_SIZE_AT_320X200 +
+		 0x10000 * 3) < minimum_memory)
+	{
+		Con_Printf ("Not enough memory for video mode\n");
+		VGA_pcurmode = NULL;	// so no further accesses to the buffer are
+								//  attempted, particularly when clearing
+		return false;		// not enough memory for mode
+	}
+
+	VGA_buffersize = tbuffersize;
+	vid_surfcachesize = tsize;
+
+	if (d_pzbuffer)
+	{
+		D_FlushCaches ();
+		Hunk_FreeToHighMark (VGA_highhunkmark);
+		d_pzbuffer = NULL;
+	}
+
+	VGA_highhunkmark = Hunk_HighMark ();
+
+	d_pzbuffer = Hunk_HighAllocName (VGA_buffersize, "video");
+
+	vid_surfcache = (byte *)d_pzbuffer
+		+ lvid->width * lvid->height * sizeof (*d_pzbuffer);
+	
+	if (allocnewbuffer)
+	{
+		lvid->buffer = (void *)( (byte *)vid_surfcache + vid_surfcachesize);
+		lvid->conbuffer = lvid->buffer;
+	}
+
+	return true;
+}
+
+
+/*
+================
+VGA_CheckAdequateMem
+================
+*/
+qboolean VGA_CheckAdequateMem (int width, int height, int rowbytes,
+	int allocnewbuffer)
+{
+	int		tbuffersize;
+
+	tbuffersize = width * height * sizeof (*d_pzbuffer);
+
+	if (allocnewbuffer)
+	{
+	// alloc an extra line in case we want to wrap, and allocate the z-buffer
+		tbuffersize += (rowbytes * (height + 1));
+	}
+
+	tbuffersize += D_SurfaceCacheForRes (width, height);
+
+// see if there's enough memory, allowing for the normal mode 0x13 pixel,
+// z, and surface buffers
+	if ((host_parms.memsize - tbuffersize + SURFCACHE_SIZE_AT_320X200 +
+		 0x10000 * 3) < minimum_memory)
+	{
+		return false;		// not enough memory for mode
+	}
+
+	return true;
+}
+
+
+/*
+================
+VGA_InitMode
+================
+*/
+int VGA_InitMode (viddef_t *lvid, vmode_t *pcurrentmode)
+{
+	vextra_t		*pextra;
+
+	pextra = pcurrentmode->pextradata;
+
+	if (!VGA_FreeAndAllocVidbuffer (lvid, pextra->vidbuffer))
+		return -1;	// memory alloc failed
+
+	if (VGA_pcurmode)
+		VGA_ClearVideoMem (VGA_pcurmode->planar);
+
+// mode 0x13 is the base for all the Mode X-class mode sets
+	regs.h.ah = 0;
+	regs.h.al = 0x13;
+	dos_int86(0x10);
+
+	VGA_pagebase = (void *)real2ptr(0xa0000);
+	lvid->direct = (pixel_t *)VGA_pagebase;
+
+// set additional registers as needed
+	VideoRegisterSet (pextra->pregset);
+
+	VGA_numpages = 1;
+	lvid->numpages = VGA_numpages;
+
+	VGA_width = (lvid->width + 0x1F) & ~0x1F;
+	VGA_height = lvid->height;
+	VGA_planar = pcurrentmode->planar;
+	if (VGA_planar)
+		VGA_rowbytes = lvid->rowbytes / 4;
+	else
+		VGA_rowbytes = lvid->rowbytes;
+	VGA_bufferrowbytes = lvid->rowbytes;
+	lvid->colormap = host_colormap;
+	lvid->fullbright = 256 - LittleLong (*((int *)lvid->colormap + 2048));
+
+	lvid->maxwarpwidth = WARP_WIDTH;
+	lvid->maxwarpheight = WARP_HEIGHT;
+
+	lvid->conbuffer = lvid->buffer;
+	lvid->conrowbytes = lvid->rowbytes;
+	lvid->conwidth = lvid->width;
+	lvid->conheight = lvid->height;
+
+	VGA_pcurmode = pcurrentmode;
+
+	VGA_ClearVideoMem (pcurrentmode->planar);
+
+	if (_vid_wait_override.value)
+	{
+		Cvar_SetValue ("vid_wait", (float)VID_WAIT_VSYNC);
+	}
+	else
+	{
+		Cvar_SetValue ("vid_wait", (float)VID_WAIT_NONE);
+	}
+
+	D_InitCaches (vid_surfcache, vid_surfcachesize);
+
+	return 1;
+}
+
+
+/*
+================
+VGA_SetPalette
+================
+*/
+void VGA_SetPalette(viddef_t *lvid, vmode_t *pcurrentmode, unsigned char *pal)
+{
+	int shiftcomponents=2;
+	int i;
+
+	UNUSED(lvid);
+	UNUSED(pcurrentmode);
+
+	dos_outportb(0x3c8, 0);
+	for (i=0 ; i<768 ; i++)
+		outportb(0x3c9, pal[i]>>shiftcomponents);
+}
+
+
+/*
+================
+VGA_SwapBuffersCopy
+================
+*/
+void VGA_SwapBuffersCopy (viddef_t *lvid, vmode_t *pcurrentmode,
+	vrect_t *rects)
+{
+
+	UNUSED(pcurrentmode);
+
+// TODO: can write a dword at a time
+// TODO: put in ASM
+// TODO: copy only specified rectangles
+	if (VGA_planar)
+	{
+
+	// TODO: copy only specified rectangles
+
+		VGA_UpdatePlanarScreen (lvid->buffer);
+	}
+	else
+	{
+		while (rects)
+		{
+			VGA_UpdateLinearScreen (
+					lvid->buffer + rects->x + (rects->y * lvid->rowbytes),
+		 			VGA_pagebase + rects->x + (rects->y * VGA_rowbytes),
+					rects->width,
+					rects->height,
+					lvid->rowbytes,
+					VGA_rowbytes);
+
+			rects = rects->pnext;
+		}
+	}
+}
+
+
+/*
+================
+VGA_SwapBuffers
+================
+*/
+void VGA_SwapBuffers (viddef_t *lvid, vmode_t *pcurrentmode, vrect_t *rects)
+{
+	UNUSED(lvid);
+
+	if (vid_wait.value == VID_WAIT_VSYNC)
+		VGA_WaitVsync ();
+
+	VGA_SwapBuffersCopy (lvid, pcurrentmode, rects);
+}
+