mirror of
https://github.com/retro100/dosbox-wii.git
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1401 lines
47 KiB
C++
1401 lines
47 KiB
C++
/*
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* Copyright (C) 2002-2009 The DOSBox Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/* $Id: vga_draw.cpp,v 1.111 2009/09/10 17:44:57 h-a-l-9000 Exp $ */
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#include <string.h>
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#include <math.h>
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#include "dosbox.h"
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#include "video.h"
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#include "render.h"
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#include "../gui/render_scalers.h"
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#include "vga.h"
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#include "pic.h"
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#define VGA_PARTS 4
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typedef Bit8u * (* VGA_Line_Handler)(Bitu vidstart, Bitu line);
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static VGA_Line_Handler VGA_DrawLine;
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static Bit8u TempLine[SCALER_MAXWIDTH * 4];
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static Bit8u * VGA_Draw_1BPP_Line(Bitu vidstart, Bitu line) {
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const Bit8u *base = vga.tandy.draw_base + ((line & vga.tandy.line_mask) << vga.tandy.line_shift);
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Bit32u *draw = (Bit32u *)TempLine;
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for (Bitu x=vga.draw.blocks;x>0;x--, vidstart++) {
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Bitu val = base[(vidstart & (8 * 1024 -1))];
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*draw++=CGA_2_Table[val >> 4];
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*draw++=CGA_2_Table[val & 0xf];
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}
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return TempLine;
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}
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static Bit8u * VGA_Draw_2BPP_Line(Bitu vidstart, Bitu line) {
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const Bit8u *base = vga.tandy.draw_base + ((line & vga.tandy.line_mask) << vga.tandy.line_shift);
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Bit32u * draw=(Bit32u *)TempLine;
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for (Bitu x=0;x<vga.draw.blocks;x++) {
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Bitu val = base[vidstart & vga.tandy.addr_mask];
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vidstart++;
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*draw++=CGA_4_Table[val];
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}
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return TempLine;
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}
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static Bit8u * VGA_Draw_2BPPHiRes_Line(Bitu vidstart, Bitu line) {
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const Bit8u *base = vga.tandy.draw_base + ((line & vga.tandy.line_mask) << vga.tandy.line_shift);
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Bit32u * draw=(Bit32u *)TempLine;
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for (Bitu x=0;x<vga.draw.blocks;x++) {
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Bitu val1 = base[vidstart & vga.tandy.addr_mask];
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++vidstart;
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Bitu val2 = base[vidstart & vga.tandy.addr_mask];
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++vidstart;
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*draw++=CGA_4_HiRes_Table[(val1>>4)|(val2&0xf0)];
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*draw++=CGA_4_HiRes_Table[(val1&0x0f)|((val2&0x0f)<<4)];
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}
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return TempLine;
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}
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static Bitu temp[643]={0};
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static Bit8u * VGA_Draw_CGA16_Line(Bitu vidstart, Bitu line) {
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const Bit8u *base = vga.tandy.draw_base + ((line & vga.tandy.line_mask) << vga.tandy.line_shift);
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const Bit8u *reader = base + vidstart;
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Bit32u * draw=(Bit32u *)TempLine;
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//Generate a temporary bitline to calculate the avarage
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//over bit-2 bit-1 bit bit+1.
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//Combine this number with the current colour to get
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//an unigue index in the pallete. Or it with bit 7 as they are stored
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//in the upperpart to keep them from interfering the regular cga stuff
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for(Bitu x = 0; x < 640; x++)
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temp[x+2] = (( reader[(x>>3)] >> (7-(x&7)) )&1) << 4;
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//shift 4 as that is for the index.
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Bitu i = 0,temp1,temp2,temp3,temp4;
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for (Bitu x=0;x<vga.draw.blocks;x++) {
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Bitu val1 = *reader++;
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Bitu val2 = val1&0xf;
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val1 >>= 4;
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temp1 = temp[i] + temp[i+1] + temp[i+2] + temp[i+3]; i++;
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temp2 = temp[i] + temp[i+1] + temp[i+2] + temp[i+3]; i++;
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temp3 = temp[i] + temp[i+1] + temp[i+2] + temp[i+3]; i++;
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temp4 = temp[i] + temp[i+1] + temp[i+2] + temp[i+3]; i++;
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*draw++ = 0x80808080|(temp1|val1) |
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((temp2|val1) << 8) |
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((temp3|val1) <<16) |
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((temp4|val1) <<24);
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temp1 = temp[i] + temp[i+1] + temp[i+2] + temp[i+3]; i++;
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temp2 = temp[i] + temp[i+1] + temp[i+2] + temp[i+3]; i++;
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temp3 = temp[i] + temp[i+1] + temp[i+2] + temp[i+3]; i++;
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temp4 = temp[i] + temp[i+1] + temp[i+2] + temp[i+3]; i++;
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*draw++ = 0x80808080|(temp1|val2) |
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((temp2|val2) << 8) |
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((temp3|val2) <<16) |
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((temp4|val2) <<24);
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}
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return TempLine;
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}
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static Bit8u * VGA_Draw_4BPP_Line(Bitu vidstart, Bitu line) {
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const Bit8u *base = vga.tandy.draw_base + ((line & vga.tandy.line_mask) << vga.tandy.line_shift);
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Bit32u * draw=(Bit32u *)TempLine;
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for (Bitu x=0;x<vga.draw.blocks;x++) {
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Bitu val1 = base[vidstart & vga.tandy.addr_mask];
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++vidstart;
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Bitu val2 = base[vidstart & vga.tandy.addr_mask];
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++vidstart;
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*draw++=(val1 & 0x0f) << 8 |
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(val1 & 0xf0) >> 4 |
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(val2 & 0x0f) << 24 |
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(val2 & 0xf0) << 12;
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}
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return TempLine;
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}
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static Bit8u * VGA_Draw_4BPP_Line_Double(Bitu vidstart, Bitu line) {
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const Bit8u *base = vga.tandy.draw_base + ((line & vga.tandy.line_mask) << vga.tandy.line_shift);
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Bit32u * draw=(Bit32u *)TempLine;
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for (Bitu x=0;x<vga.draw.blocks;x++) {
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Bitu val = base[vidstart & vga.tandy.addr_mask];
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++vidstart;
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*draw++=(val & 0xf0) >> 4 |
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(val & 0xf0) << 4 |
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(val & 0x0f) << 16 |
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(val & 0x0f) << 24;
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}
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return TempLine;
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}
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#ifdef VGA_KEEP_CHANGES
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static Bit8u * VGA_Draw_Changes_Line(Bitu vidstart, Bitu line) {
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Bitu checkMask = vga.changes.checkMask;
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Bit8u *map = vga.changes.map;
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Bitu start = (vidstart >> VGA_CHANGE_SHIFT);
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Bitu end = ((vidstart + vga.draw.line_length ) >> VGA_CHANGE_SHIFT);
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for (; start <= end;start++) {
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if ( map[start] & checkMask ) {
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Bitu offset = vidstart & vga.draw.linear_mask;
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if(vga.draw.linear_mask-offset < vga.draw.line_length)
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memcpy(vga.draw.linear_base+vga.draw.linear_mask+1, vga.draw.linear_base, vga.draw.line_length);
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Bit8u *ret = &vga.draw.linear_base[ offset ];
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#if !defined(C_UNALIGNED_MEMORY)
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if (GCC_UNLIKELY( ((Bitu)ret) & (sizeof(Bitu)-1)) ) {
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memcpy( TempLine, ret, vga.draw.line_length );
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return TempLine;
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}
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#endif
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return ret;
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}
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}
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// memset( TempLine, 0x30, vga.changes.lineWidth );
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// return TempLine;
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return 0;
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}
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#endif
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static Bit8u * VGA_Draw_Linear_Line(Bitu vidstart, Bitu /*line*/) {
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// There is guaranteed extra memory past the wrap boundary. So, instead of using temporary
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// storage just copy appropriate chunk from the beginning to the wrap boundary when needed.
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Bitu offset = vidstart & vga.draw.linear_mask;
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if (vga.draw.linear_mask-offset < vga.draw.line_length)
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memcpy(vga.draw.linear_base+vga.draw.linear_mask+1, vga.draw.linear_base, vga.draw.line_length);
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Bit8u *ret = &vga.draw.linear_base[ offset ];
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#if !defined(C_UNALIGNED_MEMORY)
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if (GCC_UNLIKELY( ((Bitu)ret) & (sizeof(Bitu)-1)) ) {
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memcpy( TempLine, ret, vga.draw.line_length );
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return TempLine;
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}
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#endif
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return ret;
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}
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static Bit8u * VGA_Draw_Xlat16_Linear_Line(Bitu vidstart, Bitu /*line*/) {
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Bit8u *ret = &vga.draw.linear_base[ vidstart & vga.draw.linear_mask ];
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Bit16u* temps = (Bit16u*) TempLine;
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for(Bitu i = 0; i < vga.draw.line_length; i++) {
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temps[i]=vga.dac.xlat16[ret[i]];
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}
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return TempLine;
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/*
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#if !defined(C_UNALIGNED_MEMORY)
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if (GCC_UNLIKELY( ((Bitu)ret) & (sizeof(Bitu)-1)) ) {
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memcpy( TempLine, ret, vga.draw.line_length );
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return TempLine;
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}
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#endif
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return ret;*/
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}
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//Test version, might as well keep it
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/* static Bit8u * VGA_Draw_Chain_Line(Bitu vidstart, Bitu line) {
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Bitu i = 0;
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for ( i = 0; i < vga.draw.width;i++ ) {
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Bitu addr = vidstart + i;
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TempLine[i] = vga.mem.linear[((addr&~3)<<2)+(addr&3)];
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}
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return TempLine;
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} */
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static Bit8u * VGA_Draw_VGA_Line_HWMouse( Bitu vidstart, Bitu /*line*/) {
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if (!svga.hardware_cursor_active || !svga.hardware_cursor_active())
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// HW Mouse not enabled, use the tried and true call
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return &vga.mem.linear[vidstart];
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Bitu lineat = (vidstart-(vga.config.real_start<<2)) / vga.draw.width;
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if ((vga.s3.hgc.posx >= vga.draw.width) ||
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(lineat < vga.s3.hgc.originy) ||
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(lineat > (vga.s3.hgc.originy + (63U-vga.s3.hgc.posy))) ) {
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// the mouse cursor *pattern* is not on this line
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return &vga.mem.linear[ vidstart ];
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} else {
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// Draw mouse cursor: cursor is a 64x64 pattern which is shifted (inside the
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// 64x64 mouse cursor space) to the right by posx pixels and up by posy pixels.
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// This is used when the mouse cursor partially leaves the screen.
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// It is arranged as bitmap of 16bits of bitA followed by 16bits of bitB, each
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// AB bits corresponding to a cursor pixel. The whole map is 8kB in size.
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memcpy(TempLine, &vga.mem.linear[ vidstart ], vga.draw.width);
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// the index of the bit inside the cursor bitmap we start at:
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Bitu sourceStartBit = ((lineat - vga.s3.hgc.originy) + vga.s3.hgc.posy)*64 + vga.s3.hgc.posx;
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// convert to video memory addr and bit index
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// start adjusted to the pattern structure (thus shift address by 2 instead of 3)
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// Need to get rid of the third bit, so "/8 *2" becomes ">> 2 & ~1"
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Bitu cursorMemStart = ((sourceStartBit >> 2)& ~1) + (((Bit32u)vga.s3.hgc.startaddr) << 10);
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Bitu cursorStartBit = sourceStartBit & 0x7;
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// stay at the right position in the pattern
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if (cursorMemStart & 0x2) cursorMemStart--;
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Bitu cursorMemEnd = cursorMemStart + ((64-vga.s3.hgc.posx) >> 2);
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Bit8u* xat = &TempLine[vga.s3.hgc.originx]; // mouse data start pos. in scanline
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for (Bitu m = cursorMemStart; m < cursorMemEnd; (m&1)?(m+=3):m++) {
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// for each byte of cursor data
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Bit8u bitsA = vga.mem.linear[m];
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Bit8u bitsB = vga.mem.linear[m+2];
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for (Bit8u bit=(0x80 >> cursorStartBit); bit != 0; bit >>= 1) {
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// for each bit
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cursorStartBit=0; // only the first byte has some bits cut off
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if (bitsA&bit) {
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if (bitsB&bit) *xat ^= 0xFF; // Invert screen data
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//else Transparent
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} else if (bitsB&bit) {
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*xat = vga.s3.hgc.forestack[0]; // foreground color
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} else {
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*xat = vga.s3.hgc.backstack[0];
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}
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xat++;
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}
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}
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return TempLine;
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}
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}
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static Bit8u * VGA_Draw_LIN16_Line_HWMouse(Bitu vidstart, Bitu /*line*/) {
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if (!svga.hardware_cursor_active || !svga.hardware_cursor_active())
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return &vga.mem.linear[vidstart];
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Bitu lineat = ((vidstart-(vga.config.real_start<<2)) >> 1) / vga.draw.width;
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if ((vga.s3.hgc.posx >= vga.draw.width) ||
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(lineat < vga.s3.hgc.originy) ||
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(lineat > (vga.s3.hgc.originy + (63U-vga.s3.hgc.posy))) ) {
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return &vga.mem.linear[vidstart];
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} else {
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memcpy(TempLine, &vga.mem.linear[ vidstart ], vga.draw.width*2);
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Bitu sourceStartBit = ((lineat - vga.s3.hgc.originy) + vga.s3.hgc.posy)*64 + vga.s3.hgc.posx;
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Bitu cursorMemStart = ((sourceStartBit >> 2)& ~1) + (((Bit32u)vga.s3.hgc.startaddr) << 10);
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Bitu cursorStartBit = sourceStartBit & 0x7;
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if (cursorMemStart & 0x2) cursorMemStart--;
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Bitu cursorMemEnd = cursorMemStart + ((64-vga.s3.hgc.posx) >> 2);
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Bit16u* xat = &((Bit16u*)TempLine)[vga.s3.hgc.originx];
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for (Bitu m = cursorMemStart; m < cursorMemEnd; (m&1)?(m+=3):m++) {
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// for each byte of cursor data
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Bit8u bitsA = vga.mem.linear[m];
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Bit8u bitsB = vga.mem.linear[m+2];
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for (Bit8u bit=(0x80 >> cursorStartBit); bit != 0; bit >>= 1) {
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// for each bit
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cursorStartBit=0;
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if (bitsA&bit) {
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// byte order doesn't matter here as all bits get flipped
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if (bitsB&bit) *xat ^= ~0U;
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//else Transparent
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} else if (bitsB&bit) {
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// Source as well as destination are Bit8u arrays,
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// so this should work out endian-wise?
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*xat = *(Bit16u*)vga.s3.hgc.forestack;
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} else {
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*xat = *(Bit16u*)vga.s3.hgc.backstack;
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}
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xat++;
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}
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}
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return TempLine;
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}
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}
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static Bit8u * VGA_Draw_LIN32_Line_HWMouse(Bitu vidstart, Bitu /*line*/) {
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if (!svga.hardware_cursor_active || !svga.hardware_cursor_active())
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return &vga.mem.linear[vidstart];
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Bitu lineat = ((vidstart-(vga.config.real_start<<2)) >> 2) / vga.draw.width;
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if ((vga.s3.hgc.posx >= vga.draw.width) ||
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(lineat < vga.s3.hgc.originy) ||
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(lineat > (vga.s3.hgc.originy + (63U-vga.s3.hgc.posy))) ) {
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return &vga.mem.linear[ vidstart ];
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} else {
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memcpy(TempLine, &vga.mem.linear[ vidstart ], vga.draw.width*4);
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Bitu sourceStartBit = ((lineat - vga.s3.hgc.originy) + vga.s3.hgc.posy)*64 + vga.s3.hgc.posx;
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Bitu cursorMemStart = ((sourceStartBit >> 2)& ~1) + (((Bit32u)vga.s3.hgc.startaddr) << 10);
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Bitu cursorStartBit = sourceStartBit & 0x7;
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if (cursorMemStart & 0x2) cursorMemStart--;
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Bitu cursorMemEnd = cursorMemStart + ((64-vga.s3.hgc.posx) >> 2);
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Bit32u* xat = &((Bit32u*)TempLine)[vga.s3.hgc.originx];
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for (Bitu m = cursorMemStart; m < cursorMemEnd; (m&1)?(m+=3):m++) {
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// for each byte of cursor data
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Bit8u bitsA = vga.mem.linear[m];
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Bit8u bitsB = vga.mem.linear[m+2];
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for (Bit8u bit=(0x80 >> cursorStartBit); bit != 0; bit >>= 1) { // for each bit
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cursorStartBit=0;
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if (bitsA&bit) {
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if (bitsB&bit) *xat ^= ~0U;
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//else Transparent
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} else if (bitsB&bit) {
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*xat = *(Bit32u*)vga.s3.hgc.forestack;
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} else {
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*xat = *(Bit32u*)vga.s3.hgc.backstack;
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}
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xat++;
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}
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}
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return TempLine;
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}
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}
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static const Bit8u* VGA_Text_Memwrap(Bitu vidstart) {
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vidstart &= vga.draw.linear_mask;
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Bitu line_end = 2 * vga.draw.blocks;
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if (GCC_UNLIKELY((vidstart + line_end) > vga.draw.linear_mask)) {
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// wrapping in this line
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Bitu break_pos = (vga.draw.linear_mask - vidstart) + 1;
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// need a temporary storage - TempLine/2 is ok for a bit more than 132 columns
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memcpy(&TempLine[sizeof(TempLine)/2], &vga.tandy.draw_base[vidstart], break_pos);
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memcpy(&TempLine[sizeof(TempLine)/2 + break_pos],&vga.tandy.draw_base[0], line_end - break_pos);
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return &TempLine[sizeof(TempLine)/2];
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} else return &vga.tandy.draw_base[vidstart];
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}
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static Bit32u FontMask[2]={0xffffffff,0x0};
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static Bit8u * VGA_TEXT_Draw_Line(Bitu vidstart, Bitu line) {
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Bits font_addr;
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Bit32u * draw=(Bit32u *)TempLine;
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const Bit8u* vidmem = VGA_Text_Memwrap(vidstart);
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for (Bitu cx=0;cx<vga.draw.blocks;cx++) {
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Bitu chr=vidmem[cx*2];
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Bitu col=vidmem[cx*2+1];
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Bitu font=vga.draw.font_tables[(col >> 3)&1][chr*32+line];
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Bit32u mask1=TXT_Font_Table[font>>4] & FontMask[col >> 7];
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Bit32u mask2=TXT_Font_Table[font&0xf] & FontMask[col >> 7];
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Bit32u fg=TXT_FG_Table[col&0xf];
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Bit32u bg=TXT_BG_Table[col>>4];
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*draw++=(fg&mask1) | (bg&~mask1);
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*draw++=(fg&mask2) | (bg&~mask2);
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}
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if (!vga.draw.cursor.enabled || !(vga.draw.cursor.count&0x8)) goto skip_cursor;
|
|
font_addr = (vga.draw.cursor.address-vidstart) >> 1;
|
|
if (font_addr>=0 && font_addr<(Bits)vga.draw.blocks) {
|
|
if (line<vga.draw.cursor.sline) goto skip_cursor;
|
|
if (line>vga.draw.cursor.eline) goto skip_cursor;
|
|
draw=(Bit32u *)&TempLine[font_addr*8];
|
|
Bit32u att=TXT_FG_Table[vga.tandy.draw_base[vga.draw.cursor.address+1]&0xf];
|
|
*draw++=att;*draw++=att;
|
|
}
|
|
skip_cursor:
|
|
return TempLine;
|
|
}
|
|
|
|
static Bit8u * VGA_TEXT_Herc_Draw_Line(Bitu vidstart, Bitu line) {
|
|
Bits font_addr;
|
|
Bit32u * draw=(Bit32u *)TempLine;
|
|
const Bit8u* vidmem = VGA_Text_Memwrap(vidstart);
|
|
|
|
for (Bitu cx=0;cx<vga.draw.blocks;cx++) {
|
|
Bitu chr=vidmem[cx*2];
|
|
Bitu attrib=vidmem[cx*2+1];
|
|
if (!(attrib&0x77)) {
|
|
// 00h, 80h, 08h, 88h produce black space
|
|
*draw++=0;
|
|
*draw++=0;
|
|
} else {
|
|
Bit32u bg, fg;
|
|
bool underline=false;
|
|
if ((attrib&0x77)==0x70) {
|
|
bg = TXT_BG_Table[0x7];
|
|
if (attrib&0x8) fg = TXT_FG_Table[0xf];
|
|
else fg = TXT_FG_Table[0x0];
|
|
} else {
|
|
if (((Bitu)(vga.crtc.underline_location&0x1f)==line) && ((attrib&0x77)==0x1)) underline=true;
|
|
bg = TXT_BG_Table[0x0];
|
|
if (attrib&0x8) fg = TXT_FG_Table[0xf];
|
|
else fg = TXT_FG_Table[0x7];
|
|
}
|
|
Bit32u mask1, mask2;
|
|
if (GCC_UNLIKELY(underline)) mask1 = mask2 = FontMask[attrib >> 7];
|
|
else {
|
|
Bitu font=vga.draw.font_tables[0][chr*32+line];
|
|
mask1=TXT_Font_Table[font>>4] & FontMask[attrib >> 7]; // blinking
|
|
mask2=TXT_Font_Table[font&0xf] & FontMask[attrib >> 7];
|
|
}
|
|
*draw++=(fg&mask1) | (bg&~mask1);
|
|
*draw++=(fg&mask2) | (bg&~mask2);
|
|
}
|
|
}
|
|
if (!vga.draw.cursor.enabled || !(vga.draw.cursor.count&0x8)) goto skip_cursor;
|
|
font_addr = (vga.draw.cursor.address-vidstart) >> 1;
|
|
if (font_addr>=0 && font_addr<(Bits)vga.draw.blocks) {
|
|
if (line<vga.draw.cursor.sline) goto skip_cursor;
|
|
if (line>vga.draw.cursor.eline) goto skip_cursor;
|
|
draw=(Bit32u *)&TempLine[font_addr*8];
|
|
Bit8u attr = vga.tandy.draw_base[vga.draw.cursor.address+1];
|
|
Bit32u cg;
|
|
if (attr&0x8) {
|
|
cg = TXT_FG_Table[0xf];
|
|
} else if ((attr&0x77)==0x70) {
|
|
cg = TXT_FG_Table[0x0];
|
|
} else {
|
|
cg = TXT_FG_Table[0x7];
|
|
}
|
|
*draw++=cg;*draw++=cg;
|
|
}
|
|
skip_cursor:
|
|
return TempLine;
|
|
}
|
|
|
|
static Bit8u * VGA_TEXT_Xlat16_Draw_Line(Bitu vidstart, Bitu line) {
|
|
Bits font_addr;
|
|
Bit16u * draw=(Bit16u *)TempLine;
|
|
const Bit8u* vidmem = VGA_Text_Memwrap(vidstart);
|
|
for (Bitu cx=0;cx<vga.draw.blocks;cx++) {
|
|
Bitu chr=vidmem[cx*2];
|
|
Bitu col=vidmem[cx*2+1];
|
|
Bitu font=vga.draw.font_tables[(col >> 3)&1][chr*32+line];
|
|
Bit32u mask1=TXT_Font_Table[font>>4] & FontMask[col >> 7];
|
|
Bit32u mask2=TXT_Font_Table[font&0xf] & FontMask[col >> 7];
|
|
Bit32u fg=TXT_FG_Table[col&0xf];
|
|
Bit32u bg=TXT_BG_Table[col>>4];
|
|
|
|
mask1=(fg&mask1) | (bg&~mask1);
|
|
mask2=(fg&mask2) | (bg&~mask2);
|
|
|
|
for(int i = 0; i < 4; i++) {
|
|
*draw++ = vga.dac.xlat16[(mask1>>8*i)&0xff];
|
|
}
|
|
for(int i = 0; i < 4; i++) {
|
|
*draw++ = vga.dac.xlat16[(mask2>>8*i)&0xff];
|
|
}
|
|
}
|
|
if (!vga.draw.cursor.enabled || !(vga.draw.cursor.count&0x8)) goto skip_cursor;
|
|
font_addr = (vga.draw.cursor.address-vidstart) >> 1;
|
|
if (font_addr>=0 && font_addr<(Bits)vga.draw.blocks) {
|
|
if (line<vga.draw.cursor.sline) goto skip_cursor;
|
|
if (line>vga.draw.cursor.eline) goto skip_cursor;
|
|
draw=(Bit16u *)&TempLine[font_addr*16];
|
|
Bit8u att=(Bit8u)(TXT_FG_Table[vga.tandy.draw_base[vga.draw.cursor.address+1]&0xf]&0xff);
|
|
for(int i = 0; i < 8; i++) {
|
|
*draw++ = vga.dac.xlat16[att];
|
|
}
|
|
}
|
|
skip_cursor:
|
|
return TempLine;
|
|
}
|
|
|
|
/*
|
|
static Bit8u * VGA_TEXT_Draw_Line_9(Bitu vidstart, Bitu line) {
|
|
Bits font_addr;
|
|
Bit8u * draw=(Bit8u *)TempLine;
|
|
bool underline=(Bitu)(vga.crtc.underline_location&0x1f)==line;
|
|
Bit8u pel_pan=(Bit8u)vga.draw.panning;
|
|
if ((vga.attr.mode_control&0x20) && (vga.draw.lines_done>=vga.draw.split_line)) pel_pan=0;
|
|
const Bit8u* vidmem = VGA_Text_Memwrap(vidstart);
|
|
Bit8u chr=vidmem[0];
|
|
Bit8u col=vidmem[1];
|
|
Bit8u font=(vga.draw.font_tables[(col >> 3)&1][chr*32+line])<<pel_pan;
|
|
if (underline && ((col&0x07) == 0x01)) font=0xff;
|
|
Bit8u fg=col&0xf;
|
|
Bit8u bg=(Bit8u)(TXT_BG_Table[col>>4]&0xff);
|
|
Bitu draw_blocks=vga.draw.blocks;
|
|
draw_blocks++;
|
|
for (Bitu cx=1;cx<draw_blocks;cx++) {
|
|
if (pel_pan) {
|
|
chr=vidmem[cx*2];
|
|
col=vidmem[cx*2+1];
|
|
if (underline && ((col&0x07) == 0x01)) font|=0xff>>(8-pel_pan);
|
|
else font|=vga.draw.font_tables[(col >> 3)&1][chr*32+line]>>(8-pel_pan);
|
|
fg=col&0xf;
|
|
bg=(Bit8u)(TXT_BG_Table[col>>4]&0xff);
|
|
} else {
|
|
chr=vidmem[(cx-1)*2];
|
|
col=vidmem[(cx-1)*2+1];
|
|
if (underline && ((col&0x07) == 0x01)) font=0xff;
|
|
else font=vga.draw.font_tables[(col >> 3)&1][chr*32+line];
|
|
fg=col&0xf;
|
|
bg=(Bit8u)(TXT_BG_Table[col>>4]&0xff);
|
|
}
|
|
if (FontMask[col>>7]==0) font=0;
|
|
*draw++=(font&0x80)?fg:bg; *draw++=(font&0x40)?fg:bg;
|
|
*draw++=(font&0x20)?fg:bg; *draw++=(font&0x10)?fg:bg;
|
|
*draw++=(font&0x08)?fg:bg; *draw++=(font&0x04)?fg:bg;
|
|
*draw++=(font&0x02)?fg:bg;
|
|
Bit8u last=(font&0x01)?fg:bg;
|
|
*draw++=last;
|
|
*draw++=((vga.attr.mode_control&0x04) && ((chr<0xc0) || (chr>0xdf))) ? bg : last;
|
|
if (pel_pan) {
|
|
if (underline && ((col&0x07) == 0x01)) font=0xff;
|
|
else font=(vga.draw.font_tables[(col >> 3)&1][chr*32+line])<<pel_pan;
|
|
}
|
|
}
|
|
if (!vga.draw.cursor.enabled || !(vga.draw.cursor.count&0x8)) goto skip_cursor;
|
|
font_addr = (vga.draw.cursor.address-vidstart) >> 1;
|
|
if (font_addr>=0 && font_addr<(Bits)vga.draw.blocks) {
|
|
if (line<vga.draw.cursor.sline) goto skip_cursor;
|
|
if (line>vga.draw.cursor.eline) goto skip_cursor;
|
|
draw=&TempLine[font_addr*9];
|
|
Bit8u fg=vga.tandy.draw_base[vga.draw.cursor.address+1]&0xf;
|
|
*draw++=fg; *draw++=fg; *draw++=fg; *draw++=fg;
|
|
*draw++=fg; *draw++=fg; *draw++=fg; *draw++=fg;
|
|
}
|
|
skip_cursor:
|
|
return TempLine;
|
|
}
|
|
*/
|
|
|
|
static Bit8u * VGA_TEXT_Xlat16_Draw_Line_9(Bitu vidstart, Bitu line) {
|
|
Bits font_addr;
|
|
Bit16u * draw=(Bit16u *)TempLine;
|
|
bool underline=(Bitu)(vga.crtc.underline_location&0x1f)==line;
|
|
Bit8u pel_pan=(Bit8u)vga.draw.panning;
|
|
if ((vga.attr.mode_control&0x20) && (vga.draw.lines_done>=vga.draw.split_line)) pel_pan=0;
|
|
const Bit8u* vidmem = VGA_Text_Memwrap(vidstart);
|
|
Bit8u chr=vidmem[0];
|
|
Bit8u col=vidmem[1];
|
|
Bit8u font=(vga.draw.font_tables[(col >> 3)&1][chr*32+line])<<pel_pan;
|
|
if (underline && ((col&0x07) == 0x01)) font=0xff;
|
|
Bit8u fg=col&0xf;
|
|
Bit8u bg=(Bit8u)(TXT_BG_Table[col>>4]&0xff);
|
|
Bitu draw_blocks=vga.draw.blocks;
|
|
draw_blocks++;
|
|
for (Bitu cx=1;cx<draw_blocks;cx++) {
|
|
if (pel_pan) {
|
|
chr=vidmem[cx*2];
|
|
col=vidmem[cx*2+1];
|
|
if (underline && ((col&0x07) == 0x01)) font|=0xff>>(8-pel_pan);
|
|
else font|=vga.draw.font_tables[(col >> 3)&1][chr*32+line]>>(8-pel_pan);
|
|
fg=col&0xf;
|
|
bg=(Bit8u)(TXT_BG_Table[col>>4]&0xff);
|
|
} else {
|
|
chr=vidmem[(cx-1)*2];
|
|
col=vidmem[(cx-1)*2+1];
|
|
if (underline && ((col&0x07) == 0x01)) font=0xff;
|
|
else font=vga.draw.font_tables[(col >> 3)&1][chr*32+line];
|
|
fg=col&0xf;
|
|
bg=(Bit8u)(TXT_BG_Table[col>>4]&0xff);
|
|
}
|
|
if (FontMask[col>>7]==0) font=0;
|
|
Bit8u mask=0x80;
|
|
for (int i = 0; i < 7; i++) {
|
|
*draw++=vga.dac.xlat16[font&mask?fg:bg];
|
|
mask>>=1;
|
|
}
|
|
Bit16u lastval=vga.dac.xlat16[font&mask?fg:bg];
|
|
*draw++=lastval;
|
|
*draw++=(((vga.attr.mode_control&0x04) && ((chr<0xc0) || (chr>0xdf))) &&
|
|
!(underline && ((col&0x07) == 0x01))) ?
|
|
(vga.dac.xlat16[bg]) : lastval;
|
|
if (pel_pan) {
|
|
if (underline && ((col&0x07) == 0x01)) font=0xff;
|
|
else font=(vga.draw.font_tables[(col >> 3)&1][chr*32+line])<<pel_pan;
|
|
}
|
|
}
|
|
if (!vga.draw.cursor.enabled || !(vga.draw.cursor.count&0x8)) goto skip_cursor;
|
|
font_addr = (vga.draw.cursor.address-vidstart) >> 1;
|
|
if (font_addr>=0 && font_addr<(Bits)vga.draw.blocks) {
|
|
if (line<vga.draw.cursor.sline) goto skip_cursor;
|
|
if (line>vga.draw.cursor.eline) goto skip_cursor;
|
|
draw=(Bit16u*)&TempLine[font_addr*18];
|
|
Bit8u fg=vga.tandy.draw_base[vga.draw.cursor.address+1]&0xf;
|
|
for(int i = 0; i < 8; i++) {
|
|
*draw++ = vga.dac.xlat16[fg];
|
|
}
|
|
//if(underline && ((col&0x07) == 0x01))
|
|
// *draw = vga.dac.xlat16[fg];
|
|
}
|
|
skip_cursor:
|
|
return TempLine;
|
|
}
|
|
|
|
#ifdef VGA_KEEP_CHANGES
|
|
static INLINE void VGA_ChangesEnd(void ) {
|
|
if ( vga.changes.active ) {
|
|
// vga.changes.active = false;
|
|
Bitu end = vga.draw.address >> VGA_CHANGE_SHIFT;
|
|
Bitu total = 4 + end - vga.changes.start;
|
|
Bit32u clearMask = vga.changes.clearMask;
|
|
total >>= 2;
|
|
Bit32u *clear = (Bit32u *)&vga.changes.map[ vga.changes.start & ~3 ];
|
|
while ( total-- ) {
|
|
clear[0] &= clearMask;
|
|
clear++;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
static void VGA_ProcessSplit() {
|
|
// On the EGA the address is always reset to 0.
|
|
if ((vga.attr.mode_control&0x20) || (machine==MCH_EGA)) {
|
|
vga.draw.address=0;
|
|
} else {
|
|
// In text mode only the characters are shifted by panning, not the address;
|
|
// this is done in the text line draw function.
|
|
vga.draw.address = vga.draw.byte_panning_shift*vga.draw.bytes_skip;
|
|
if (!(vga.mode==M_TEXT)) vga.draw.address += vga.draw.panning;
|
|
}
|
|
vga.draw.address_line=0;
|
|
}
|
|
|
|
static void VGA_DrawSingleLine(Bitu /*blah*/) {
|
|
if (vga.attr.enabled) {
|
|
Bit8u * data=VGA_DrawLine( vga.draw.address, vga.draw.address_line );
|
|
RENDER_DrawLine(data);
|
|
} else {
|
|
// else draw overscan color line
|
|
// TODO: black line should be good enough for now
|
|
// (DoWhackaDo)
|
|
memset(TempLine, 0, sizeof(TempLine));
|
|
RENDER_DrawLine(TempLine);
|
|
}
|
|
|
|
vga.draw.address_line++;
|
|
if (vga.draw.address_line>=vga.draw.address_line_total) {
|
|
vga.draw.address_line=0;
|
|
vga.draw.address+=vga.draw.address_add;
|
|
}
|
|
vga.draw.lines_done++;
|
|
if (vga.draw.split_line==vga.draw.lines_done) VGA_ProcessSplit();
|
|
if (vga.draw.lines_done < vga.draw.lines_total) {
|
|
PIC_AddEvent(VGA_DrawSingleLine,(float)vga.draw.delay.htotal);
|
|
} else RENDER_EndUpdate();
|
|
}
|
|
|
|
static void VGA_DrawPart(Bitu lines) {
|
|
while (lines--) {
|
|
Bit8u * data=VGA_DrawLine( vga.draw.address, vga.draw.address_line );
|
|
RENDER_DrawLine(data);
|
|
vga.draw.address_line++;
|
|
if (vga.draw.address_line>=vga.draw.address_line_total) {
|
|
vga.draw.address_line=0;
|
|
vga.draw.address+=vga.draw.address_add;
|
|
}
|
|
vga.draw.lines_done++;
|
|
if (vga.draw.split_line==vga.draw.lines_done) {
|
|
#ifdef VGA_KEEP_CHANGES
|
|
VGA_ChangesEnd( );
|
|
#endif
|
|
VGA_ProcessSplit();
|
|
#ifdef VGA_KEEP_CHANGES
|
|
vga.changes.start = vga.draw.address >> VGA_CHANGE_SHIFT;
|
|
#endif
|
|
}
|
|
}
|
|
if (--vga.draw.parts_left) {
|
|
PIC_AddEvent(VGA_DrawPart,(float)vga.draw.delay.parts,
|
|
(vga.draw.parts_left!=1) ? vga.draw.parts_lines : (vga.draw.lines_total - vga.draw.lines_done));
|
|
} else {
|
|
#ifdef VGA_KEEP_CHANGES
|
|
VGA_ChangesEnd();
|
|
#endif
|
|
RENDER_EndUpdate();
|
|
}
|
|
}
|
|
|
|
void VGA_SetBlinking(Bitu enabled) {
|
|
Bitu b;
|
|
LOG(LOG_VGA,LOG_NORMAL)("Blinking %d",enabled);
|
|
if (enabled) {
|
|
b=0;vga.draw.blinking=1; //used to -1 but blinking is unsigned
|
|
vga.attr.mode_control|=0x08;
|
|
vga.tandy.mode_control|=0x20;
|
|
} else {
|
|
b=8;vga.draw.blinking=0;
|
|
vga.attr.mode_control&=~0x08;
|
|
vga.tandy.mode_control&=~0x20;
|
|
}
|
|
for (Bitu i=0;i<8;i++) TXT_BG_Table[i+8]=(b+i) | ((b+i) << 8)| ((b+i) <<16) | ((b+i) << 24);
|
|
}
|
|
|
|
#ifdef VGA_KEEP_CHANGES
|
|
static void INLINE VGA_ChangesStart( void ) {
|
|
vga.changes.start = vga.draw.address >> VGA_CHANGE_SHIFT;
|
|
vga.changes.last = vga.changes.start;
|
|
if ( vga.changes.lastAddress != vga.draw.address ) {
|
|
// LOG_MSG("Address");
|
|
VGA_DrawLine = VGA_Draw_Linear_Line;
|
|
vga.changes.lastAddress = vga.draw.address;
|
|
} else if ( render.fullFrame ) {
|
|
// LOG_MSG("Full Frame");
|
|
VGA_DrawLine = VGA_Draw_Linear_Line;
|
|
} else {
|
|
// LOG_MSG("Changes");
|
|
VGA_DrawLine = VGA_Draw_Changes_Line;
|
|
}
|
|
vga.changes.active = true;
|
|
vga.changes.checkMask = vga.changes.writeMask;
|
|
vga.changes.clearMask = ~( 0x01010101 << (vga.changes.frame & 7));
|
|
vga.changes.frame++;
|
|
vga.changes.writeMask = 1 << (vga.changes.frame & 7);
|
|
}
|
|
#endif
|
|
|
|
static void VGA_VertInterrupt(Bitu /*val*/) {
|
|
if ((!vga.draw.vret_triggered) && ((vga.crtc.vertical_retrace_end&0x30)==0x10)) {
|
|
vga.draw.vret_triggered=true;
|
|
if (GCC_UNLIKELY(machine==MCH_EGA)) PIC_ActivateIRQ(9);
|
|
}
|
|
}
|
|
|
|
static void VGA_DisplayStartLatch(Bitu /*val*/) {
|
|
vga.config.real_start=vga.config.display_start & (vga.vmemwrap-1);
|
|
vga.draw.bytes_skip = vga.config.bytes_skip;
|
|
}
|
|
|
|
static void VGA_PanningLatch(Bitu /*val*/) {
|
|
vga.draw.panning = vga.config.pel_panning;
|
|
}
|
|
|
|
static void VGA_VerticalTimer(Bitu /*val*/) {
|
|
double error = vga.draw.delay.framestart;
|
|
vga.draw.delay.framestart = PIC_FullIndex();
|
|
error = vga.draw.delay.framestart - error - vga.draw.delay.vtotal;
|
|
PIC_AddEvent( VGA_VerticalTimer, (float)vga.draw.delay.vtotal );
|
|
//PIC_AddEvent( VGA_VerticalDisplayEnd, (float)vga.draw.delay.vrstart );
|
|
double flip_offset = vga.screenflip/1000.0 + vga.draw.delay.vrstart;
|
|
if(flip_offset > vga.draw.delay.vtotal) {
|
|
VGA_DisplayStartLatch(0);
|
|
} else PIC_AddEvent( VGA_DisplayStartLatch,(float)flip_offset);
|
|
PIC_AddEvent(VGA_PanningLatch,(float)vga.draw.delay.vrend);
|
|
|
|
// EGA: 82c435 datasheet: interrupt happens at display end
|
|
// VGA: checked with scope
|
|
// add a little amount of time to make sure the last drawpart has already fired
|
|
if (IS_EGAVGA_ARCH) PIC_AddEvent(VGA_VertInterrupt,(float)(vga.draw.delay.vdend + 0.005));
|
|
|
|
if ( GCC_UNLIKELY( vga.draw.parts_left)) {
|
|
if (!IS_VGA_ARCH || (svgaCard!=SVGA_None)) {
|
|
LOG(LOG_VGAMISC,LOG_NORMAL)( "Parts left: %d", vga.draw.parts_left );
|
|
PIC_RemoveEvents( &VGA_DrawPart );
|
|
RENDER_EndUpdate();
|
|
vga.draw.parts_left = 0;
|
|
}
|
|
}
|
|
//Check if we can actually render, else skip the rest
|
|
if (!RENDER_StartUpdate())
|
|
return;
|
|
if ( GCC_UNLIKELY( vga.draw.lines_done < vga.draw.lines_total)) {
|
|
if (IS_VGA_ARCH && (svgaCard==SVGA_None)) {
|
|
while(vga.draw.lines_done < vga.draw.lines_total)
|
|
VGA_DrawSingleLine(0);
|
|
PIC_RemoveEvents(VGA_DrawSingleLine);
|
|
}
|
|
}
|
|
//TODO Maybe check for an active frame on parts_left and clear that first?
|
|
vga.draw.parts_left = vga.draw.parts_total;
|
|
vga.draw.lines_done = 0;
|
|
vga.draw.address_line = vga.config.hlines_skip;
|
|
if (IS_EGAVGA_ARCH) {
|
|
vga.draw.split_line = (Bitu)((vga.config.line_compare+1)/vga.draw.lines_scaled);
|
|
if ((svgaCard==SVGA_S3Trio) && (vga.config.line_compare==0)) vga.draw.split_line=0;
|
|
} else {
|
|
vga.draw.split_line = 0x10000; // don't care
|
|
}
|
|
vga.draw.address = vga.config.real_start;
|
|
vga.draw.byte_panning_shift = 0;
|
|
// go figure...
|
|
if (machine==MCH_EGA) vga.draw.split_line*=2;
|
|
// if (machine==MCH_EGA) vga.draw.split_line = ((((vga.config.line_compare&0x5ff)+1)*2-1)/vga.draw.lines_scaled);
|
|
#ifdef VGA_KEEP_CHANGES
|
|
bool startaddr_changed=false;
|
|
#endif
|
|
switch (vga.mode) {
|
|
case M_EGA:
|
|
case M_LIN4:
|
|
vga.draw.byte_panning_shift = 8;
|
|
vga.draw.address += vga.draw.bytes_skip;
|
|
vga.draw.address *= vga.draw.byte_panning_shift;
|
|
vga.draw.address += vga.draw.panning;
|
|
#ifdef VGA_KEEP_CHANGES
|
|
startaddr_changed=true;
|
|
#endif
|
|
break;
|
|
case M_VGA:
|
|
if(vga.config.compatible_chain4 && (vga.crtc.underline_location & 0x40)) {
|
|
vga.draw.linear_base = vga.fastmem;
|
|
vga.draw.linear_mask = 0xffff;
|
|
} else {
|
|
vga.draw.linear_base = vga.mem.linear;
|
|
vga.draw.linear_mask = vga.vmemwrap - 1;
|
|
}
|
|
case M_LIN8:
|
|
case M_LIN15:
|
|
case M_LIN16:
|
|
case M_LIN32:
|
|
vga.draw.byte_panning_shift = 4;
|
|
vga.draw.address += vga.draw.bytes_skip;
|
|
vga.draw.address *= vga.draw.byte_panning_shift;
|
|
vga.draw.address += vga.draw.panning;
|
|
#ifdef VGA_KEEP_CHANGES
|
|
startaddr_changed=true;
|
|
#endif
|
|
break;
|
|
case M_TEXT:
|
|
vga.draw.byte_panning_shift = 2;
|
|
vga.draw.address += vga.draw.bytes_skip;
|
|
// fall-through
|
|
case M_TANDY_TEXT:
|
|
case M_HERC_TEXT:
|
|
if (machine==MCH_HERC) vga.draw.linear_mask = 0xfff; // 1 page
|
|
else if (IS_EGAVGA_ARCH) vga.draw.linear_mask = 0x7fff; // 8 pages
|
|
else vga.draw.linear_mask = 0x3fff; // CGA, Tandy 4 pages
|
|
vga.draw.cursor.address=vga.config.cursor_start*2;
|
|
vga.draw.address *= 2;
|
|
vga.draw.cursor.count++;
|
|
/* check for blinking and blinking change delay */
|
|
FontMask[1]=(vga.draw.blinking & (vga.draw.cursor.count >> 4)) ?
|
|
0 : 0xffffffff;
|
|
break;
|
|
case M_HERC_GFX:
|
|
break;
|
|
case M_CGA4:case M_CGA2:
|
|
vga.draw.address=(vga.draw.address*2)&0x1fff;
|
|
break;
|
|
case M_CGA16:
|
|
case M_TANDY2:case M_TANDY4:case M_TANDY16:
|
|
vga.draw.address *= 2;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (GCC_UNLIKELY(vga.draw.split_line==0)) VGA_ProcessSplit();
|
|
#ifdef VGA_KEEP_CHANGES
|
|
if (startaddr_changed) VGA_ChangesStart();
|
|
#endif
|
|
|
|
if ((IS_VGA_ARCH) && (svgaCard==SVGA_None)) PIC_AddEvent(VGA_DrawSingleLine,(float)(vga.draw.delay.htotal/4.0));
|
|
else PIC_AddEvent(VGA_DrawPart,(float)vga.draw.delay.parts,vga.draw.parts_lines);
|
|
//VGA_DrawPart( vga.draw.parts_lines );
|
|
//PIC_AddEvent(VGA_DrawPart,(float)vga.draw.delay.parts,vga.draw.parts_lines);
|
|
//PIC_AddEvent(VGA_DrawPart,(float)(vga.draw.delay.parts/2),vga.draw.parts_lines); //Else tearline in Tyrian and second reality
|
|
}
|
|
|
|
void VGA_CheckScanLength(void) {
|
|
switch (vga.mode) {
|
|
case M_EGA:
|
|
case M_LIN4:
|
|
vga.draw.address_add=vga.config.scan_len*16;
|
|
break;
|
|
case M_VGA:
|
|
case M_LIN8:
|
|
case M_LIN15:
|
|
case M_LIN16:
|
|
case M_LIN32:
|
|
vga.draw.address_add=vga.config.scan_len*8;
|
|
break;
|
|
case M_TEXT:
|
|
vga.draw.address_add=vga.config.scan_len*4;
|
|
break;
|
|
case M_CGA2:
|
|
case M_CGA4:
|
|
case M_CGA16:
|
|
vga.draw.address_add=80;
|
|
return;
|
|
case M_TANDY2:
|
|
vga.draw.address_add=vga.draw.blocks/4;
|
|
break;
|
|
case M_TANDY4:
|
|
vga.draw.address_add=vga.draw.blocks;
|
|
break;
|
|
case M_TANDY16:
|
|
vga.draw.address_add=vga.draw.blocks;
|
|
break;
|
|
case M_TANDY_TEXT:
|
|
vga.draw.address_add=vga.draw.blocks*2;
|
|
break;
|
|
case M_HERC_TEXT:
|
|
vga.draw.address_add=vga.draw.blocks*2;
|
|
break;
|
|
case M_HERC_GFX:
|
|
vga.draw.address_add=vga.draw.blocks;
|
|
break;
|
|
default:
|
|
vga.draw.address_add=vga.draw.blocks*8;
|
|
break;
|
|
}
|
|
}
|
|
|
|
void VGA_ActivateHardwareCursor(void) {
|
|
bool hwcursor_active=false;
|
|
if (svga.hardware_cursor_active) {
|
|
if (svga.hardware_cursor_active()) hwcursor_active=true;
|
|
}
|
|
if (hwcursor_active) {
|
|
switch(vga.mode) {
|
|
case M_LIN32:
|
|
VGA_DrawLine=VGA_Draw_LIN32_Line_HWMouse;
|
|
break;
|
|
case M_LIN15:
|
|
case M_LIN16:
|
|
VGA_DrawLine=VGA_Draw_LIN16_Line_HWMouse;
|
|
break;
|
|
default:
|
|
VGA_DrawLine=VGA_Draw_VGA_Line_HWMouse;
|
|
}
|
|
} else {
|
|
VGA_DrawLine=VGA_Draw_Linear_Line;
|
|
}
|
|
}
|
|
|
|
void VGA_SetupDrawing(Bitu /*val*/) {
|
|
if (vga.mode==M_ERROR) {
|
|
PIC_RemoveEvents(VGA_VerticalTimer);
|
|
PIC_RemoveEvents(VGA_PanningLatch);
|
|
PIC_RemoveEvents(VGA_DisplayStartLatch);
|
|
return;
|
|
}
|
|
/* Calculate the FPS for this screen */
|
|
float fps; Bitu clock;
|
|
Bitu htotal, hdend, hbstart, hbend, hrstart, hrend;
|
|
Bitu vtotal, vdend, vbstart, vbend, vrstart, vrend;
|
|
if (IS_EGAVGA_ARCH) {
|
|
htotal = vga.crtc.horizontal_total;
|
|
hdend = vga.crtc.horizontal_display_end;
|
|
hbend = vga.crtc.end_horizontal_blanking&0x1F;
|
|
hbstart = vga.crtc.start_horizontal_blanking;
|
|
hrstart = vga.crtc.start_horizontal_retrace;
|
|
|
|
vtotal= vga.crtc.vertical_total | ((vga.crtc.overflow & 1) << 8);
|
|
vdend = vga.crtc.vertical_display_end | ((vga.crtc.overflow & 2)<<7);
|
|
vbstart = vga.crtc.start_vertical_blanking | ((vga.crtc.overflow & 0x08) << 5);
|
|
vrstart = vga.crtc.vertical_retrace_start + ((vga.crtc.overflow & 0x04) << 6);
|
|
|
|
if (IS_VGA_ARCH) {
|
|
// additional bits only present on vga cards
|
|
htotal |= (vga.s3.ex_hor_overflow & 0x1) << 8;
|
|
htotal += 3;
|
|
hdend |= (vga.s3.ex_hor_overflow & 0x2) << 7;
|
|
hbend |= (vga.crtc.end_horizontal_retrace&0x80) >> 2;
|
|
hbstart |= (vga.s3.ex_hor_overflow & 0x4) << 6;
|
|
hrstart |= (vga.s3.ex_hor_overflow & 0x10) << 4;
|
|
|
|
vtotal |= (vga.crtc.overflow & 0x20) << 4;
|
|
vtotal |= (vga.s3.ex_ver_overflow & 0x1) << 10;
|
|
vdend |= (vga.crtc.overflow & 0x40) << 3;
|
|
vdend |= (vga.s3.ex_ver_overflow & 0x2) << 9;
|
|
vbstart |= (vga.crtc.maximum_scan_line & 0x20) << 4;
|
|
vbstart |= (vga.s3.ex_ver_overflow & 0x4) << 8;
|
|
vrstart |= ((vga.crtc.overflow & 0x80) << 2);
|
|
vrstart |= (vga.s3.ex_ver_overflow & 0x10) << 6;
|
|
vbend = vga.crtc.end_vertical_blanking & 0x3f;
|
|
} else {
|
|
vbend = vga.crtc.end_vertical_blanking & 0xf;
|
|
}
|
|
htotal += 2;
|
|
vtotal += 2;
|
|
hdend += 1;
|
|
vdend += 1;
|
|
|
|
hbend = hbstart + ((hbend - hbstart) & 0x3F);
|
|
hrend = vga.crtc.end_horizontal_retrace & 0x1f;
|
|
hrend = (hrend - hrstart) & 0x1f;
|
|
|
|
if ( !hrend ) hrend = hrstart + 0x1f + 1;
|
|
else hrend = hrstart + hrend;
|
|
|
|
vrend = vga.crtc.vertical_retrace_end & 0xF;
|
|
vrend = ( vrend - vrstart)&0xF;
|
|
|
|
if ( !vrend) vrend = vrstart + 0xf + 1;
|
|
else vrend = vrstart + vrend;
|
|
|
|
vbend = (vbend - vbstart) & 0x3f;
|
|
if ( !vbend) vbend = vbstart + 0x3f + 1;
|
|
else vbend = vbstart + vbend;
|
|
|
|
if (svga.get_clock) {
|
|
clock = svga.get_clock();
|
|
} else {
|
|
switch ((vga.misc_output >> 2) & 3) {
|
|
case 0:
|
|
clock = (machine==MCH_EGA) ? 14318180 : 25175000;
|
|
break;
|
|
case 1:
|
|
default:
|
|
clock = (machine==MCH_EGA) ? 16257000 : 28322000;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Check for 8 for 9 character clock mode */
|
|
if (vga.seq.clocking_mode & 1 ) clock/=8; else clock/=9;
|
|
/* Check for pixel doubling, master clock/2 */
|
|
if (vga.seq.clocking_mode & 0x8) {
|
|
htotal*=2;
|
|
}
|
|
vga.draw.address_line_total=(vga.crtc.maximum_scan_line&0x1f)+1;
|
|
if(IS_VGA_ARCH && (svgaCard==SVGA_None) && (vga.mode==M_EGA || vga.mode==M_VGA)) {
|
|
// vgaonly; can't use with CGA because these use address_line for their
|
|
// own purposes.
|
|
// Set the low resolution modes to have as many lines as are scanned -
|
|
// Quite a few demos change the max_scanline register at display time
|
|
// to get SFX: Majic12 show, Magic circle, Copper, GBU, Party91
|
|
if( vga.crtc.maximum_scan_line&0x80) vga.draw.address_line_total*=2;
|
|
vga.draw.double_scan=false;
|
|
}
|
|
else if (IS_VGA_ARCH) vga.draw.double_scan=(vga.crtc.maximum_scan_line&0x80)>0;
|
|
else vga.draw.double_scan=(vtotal==262);
|
|
} else {
|
|
htotal = vga.other.htotal + 1;
|
|
hdend = vga.other.hdend;
|
|
hbstart = hdend;
|
|
hbend = htotal;
|
|
hrstart = vga.other.hsyncp;
|
|
hrend = hrstart + (vga.other.syncw & 0xf) ;
|
|
|
|
vga.draw.address_line_total = vga.other.max_scanline + 1;
|
|
vtotal = vga.draw.address_line_total * (vga.other.vtotal+1)+vga.other.vadjust;
|
|
vdend = vga.draw.address_line_total * vga.other.vdend;
|
|
vrstart = vga.draw.address_line_total * vga.other.vsyncp;
|
|
vrend = (vga.other.syncw >> 4);
|
|
if (!vrend)
|
|
vrend = vrstart + 0xf + 1;
|
|
else
|
|
vrend = vrstart + vrend;
|
|
vbstart = vdend;
|
|
vbend = vtotal;
|
|
vga.draw.double_scan=false;
|
|
switch (machine) {
|
|
case MCH_CGA:
|
|
case TANDY_ARCH_CASE:
|
|
clock=((vga.tandy.mode_control & 1) ? 14318180 : (14318180/2))/8;
|
|
break;
|
|
case MCH_HERC:
|
|
if (vga.herc.mode_control & 0x2) clock=16000000/16;
|
|
else clock=16000000/8;
|
|
break;
|
|
default:
|
|
clock = 14318180;
|
|
break;
|
|
}
|
|
vga.draw.delay.hdend = hdend*1000.0/clock; //in milliseconds
|
|
}
|
|
#if C_DEBUG
|
|
LOG(LOG_VGA,LOG_NORMAL)("h total %d end %d blank (%d/%d) retrace (%d/%d)",
|
|
htotal, hdend, hbstart, hbend, hrstart, hrend );
|
|
LOG(LOG_VGA,LOG_NORMAL)("v total %d end %d blank (%d/%d) retrace (%d/%d)",
|
|
vtotal, vdend, vbstart, vbend, vrstart, vrend );
|
|
#endif
|
|
if (!htotal) return;
|
|
if (!vtotal) return;
|
|
|
|
fps=(float)clock/(vtotal*htotal);
|
|
// The time a complete video frame takes
|
|
vga.draw.delay.vtotal = (1000.0 * (double)(vtotal*htotal)) / (double)clock;
|
|
// Horizontal total (that's how long a line takes with whistles and bells)
|
|
vga.draw.delay.htotal = htotal*1000.0/clock; //in milliseconds
|
|
// Start and End of horizontal blanking
|
|
vga.draw.delay.hblkstart = hbstart*1000.0/clock; //in milliseconds
|
|
vga.draw.delay.hblkend = hbend*1000.0/clock;
|
|
vga.draw.delay.hrstart = 0;
|
|
|
|
// Start and End of vertical blanking
|
|
vga.draw.delay.vblkstart = vbstart * vga.draw.delay.htotal;
|
|
vga.draw.delay.vblkend = vbend * vga.draw.delay.htotal;
|
|
// Start and End of vertical retrace pulse
|
|
vga.draw.delay.vrstart = vrstart * vga.draw.delay.htotal;
|
|
vga.draw.delay.vrend = vrend * vga.draw.delay.htotal;
|
|
// Display end
|
|
vga.draw.delay.vdend = vdend * vga.draw.delay.htotal;
|
|
|
|
#if C_DEBUG
|
|
LOG(LOG_VGA,LOG_NORMAL)("h total %2.5f (%3.2fkHz) blank(%02.5f/%02.5f) retrace(%02.5f/%02.5f)",
|
|
vga.draw.delay.htotal,(1.0/vga.draw.delay.htotal),
|
|
vga.draw.delay.hblkstart,vga.draw.delay.hblkend,
|
|
vga.draw.delay.hrstart,vga.draw.delay.hrend);
|
|
LOG(LOG_VGA,LOG_NORMAL)("v total %2.5f (%3.2fHz) blank(%02.5f/%02.5f) retrace(%02.5f/%02.5f)",
|
|
vga.draw.delay.vtotal,(1000.0/vga.draw.delay.vtotal),
|
|
vga.draw.delay.vblkstart,vga.draw.delay.vblkend,
|
|
vga.draw.delay.vrstart,vga.draw.delay.vrend);
|
|
#endif
|
|
|
|
vga.draw.parts_total=VGA_PARTS;
|
|
/*
|
|
6 Horizontal Sync Polarity. Negative if set
|
|
7 Vertical Sync Polarity. Negative if set
|
|
Bit 6-7 indicates the number of lines on the display:
|
|
1: 400, 2: 350, 3: 480
|
|
*/
|
|
//Try to determine the pixel size, aspect correct is based around square pixels
|
|
|
|
//Base pixel width around 100 clocks horizontal
|
|
//For 9 pixel text modes this should be changed, but we don't support that anyway :)
|
|
//Seems regular vga only listens to the 9 char pixel mode with character mode enabled
|
|
double pwidth = (machine==MCH_EGA) ? (114.0 / htotal) : (100.0 / htotal);
|
|
//Base pixel height around vertical totals of modes that have 100 clocks horizontal
|
|
//Different sync values gives different scaling of the whole vertical range
|
|
//VGA monitor just seems to thighten or widen the whole vertical range
|
|
double pheight;
|
|
double target_total = (machine==MCH_EGA) ? 262.0 : 449.0;
|
|
Bitu sync = vga.misc_output >> 6;
|
|
switch ( sync ) {
|
|
case 0: // This is not defined in vga specs,
|
|
// Kiet, seems to be slightly less than 350 on my monitor
|
|
//340 line mode, filled with 449 total
|
|
pheight = (480.0 / 340.0) * ( target_total / vtotal );
|
|
break;
|
|
case 1: //400 line mode, filled with 449 total
|
|
pheight = (480.0 / 400.0) * ( target_total / vtotal );
|
|
break;
|
|
case 2: //350 line mode, filled with 449 total
|
|
//This mode seems to get regular 640x400 timing and goes for a loong retrace
|
|
//Depends on the monitor to stretch the screen
|
|
pheight = (480.0 / 350.0) * ( target_total / vtotal );
|
|
break;
|
|
case 3: //480 line mode, filled with 525 total
|
|
default:
|
|
pheight = (480.0 / 480.0) * ( 525.0 / vtotal );
|
|
break;
|
|
}
|
|
|
|
double aspect_ratio = pheight / pwidth;
|
|
|
|
vga.draw.delay.parts = vga.draw.delay.vdend/vga.draw.parts_total;
|
|
vga.draw.resizing=false;
|
|
vga.draw.vret_triggered=false;
|
|
|
|
//Check to prevent useless black areas
|
|
if (hbstart<hdend) hdend=hbstart;
|
|
//if (vbstart<vdend) vdend=vbstart;
|
|
// magic.exe demo by European Technology uses blanking from line 0 - 63
|
|
if (vbstart!=0 && vbstart<vdend) vdend=vbstart;
|
|
|
|
Bitu width=hdend;
|
|
Bitu height=vdend;
|
|
bool doubleheight=false;
|
|
bool doublewidth=false;
|
|
|
|
//Set the bpp
|
|
Bitu bpp;
|
|
switch (vga.mode) {
|
|
case M_LIN15:
|
|
bpp = 15;
|
|
break;
|
|
case M_LIN16:
|
|
bpp = 16;
|
|
break;
|
|
case M_LIN32:
|
|
bpp = 32;
|
|
break;
|
|
default:
|
|
bpp = 8;
|
|
break;
|
|
}
|
|
vga.draw.linear_base = vga.mem.linear;
|
|
vga.draw.linear_mask = vga.vmemwrap - 1;
|
|
switch (vga.mode) {
|
|
case M_VGA:
|
|
doublewidth=true;
|
|
width<<=2;
|
|
if ((IS_VGA_ARCH) && (svgaCard==SVGA_None)) {
|
|
bpp=16;
|
|
VGA_DrawLine = VGA_Draw_Xlat16_Linear_Line;
|
|
} else VGA_DrawLine = VGA_Draw_Linear_Line;
|
|
break;
|
|
case M_LIN8:
|
|
if (vga.crtc.mode_control & 0x8)
|
|
width >>=1;
|
|
else if(svgaCard == SVGA_S3Trio && !(vga.s3.reg_3a&0x10)) {
|
|
doublewidth=true;
|
|
width >>=1;
|
|
}
|
|
// fall-through
|
|
case M_LIN32:
|
|
width<<=3;
|
|
if (vga.crtc.mode_control & 0x8)
|
|
doublewidth = true;
|
|
/* Use HW mouse cursor drawer if enabled */
|
|
VGA_ActivateHardwareCursor();
|
|
break;
|
|
case M_LIN15:
|
|
case M_LIN16:
|
|
// 15/16 bpp modes double the horizontal values
|
|
width<<=2;
|
|
if ((vga.crtc.mode_control & 0x8) || (svgaCard == SVGA_S3Trio && (vga.s3.pll.cmd & 0x10)))
|
|
doublewidth = true;
|
|
/* Use HW mouse cursor drawer if enabled */
|
|
VGA_ActivateHardwareCursor();
|
|
break;
|
|
case M_LIN4:
|
|
doublewidth=(vga.seq.clocking_mode & 0x8) > 0;
|
|
vga.draw.blocks = width;
|
|
width<<=3;
|
|
VGA_DrawLine=VGA_Draw_Linear_Line;
|
|
vga.draw.linear_base = vga.fastmem;
|
|
vga.draw.linear_mask = (vga.vmemwrap<<1) - 1;
|
|
break;
|
|
case M_EGA:
|
|
doublewidth=(vga.seq.clocking_mode & 0x8) > 0;
|
|
vga.draw.blocks = width;
|
|
width<<=3;
|
|
if ((IS_VGA_ARCH) && (svgaCard==SVGA_None)) {
|
|
bpp=16;
|
|
VGA_DrawLine = VGA_Draw_Xlat16_Linear_Line;
|
|
} else VGA_DrawLine=VGA_Draw_Linear_Line;
|
|
|
|
vga.draw.linear_base = vga.fastmem;
|
|
vga.draw.linear_mask = (vga.vmemwrap<<1) - 1;
|
|
break;
|
|
case M_CGA16:
|
|
doubleheight=true;
|
|
vga.draw.blocks=width*2;
|
|
width<<=4;
|
|
VGA_DrawLine=VGA_Draw_CGA16_Line;
|
|
break;
|
|
case M_CGA4:
|
|
doublewidth=true;
|
|
vga.draw.blocks=width*2;
|
|
width<<=3;
|
|
VGA_DrawLine=VGA_Draw_2BPP_Line;
|
|
break;
|
|
case M_CGA2:
|
|
doubleheight=true;
|
|
vga.draw.blocks=2*width;
|
|
width<<=3;
|
|
VGA_DrawLine=VGA_Draw_1BPP_Line;
|
|
break;
|
|
case M_TEXT:
|
|
aspect_ratio=1.0;
|
|
vga.draw.blocks=width;
|
|
doublewidth=(vga.seq.clocking_mode & 0x8) > 0;
|
|
if ((IS_VGA_ARCH) && (svgaCard==SVGA_None) && !(vga.seq.clocking_mode&0x01)) {
|
|
width*=9; /* 9 bit wide text font */
|
|
VGA_DrawLine=VGA_TEXT_Xlat16_Draw_Line_9;
|
|
bpp=16;
|
|
// VGA_DrawLine=VGA_TEXT_Draw_Line_9;
|
|
} else {
|
|
width<<=3; /* 8 bit wide text font */
|
|
if ((IS_VGA_ARCH) && (svgaCard==SVGA_None)) {
|
|
VGA_DrawLine=VGA_TEXT_Xlat16_Draw_Line;
|
|
bpp=16;
|
|
} else VGA_DrawLine=VGA_TEXT_Draw_Line;
|
|
}
|
|
break;
|
|
case M_HERC_GFX:
|
|
aspect_ratio=1.5;
|
|
vga.draw.blocks=width*2;
|
|
width*=16;
|
|
VGA_DrawLine=VGA_Draw_1BPP_Line;
|
|
break;
|
|
case M_TANDY2:
|
|
aspect_ratio=1.2;
|
|
doubleheight=true;
|
|
if (machine==MCH_PCJR) doublewidth=(vga.tandy.gfx_control & 0x8)==0x00;
|
|
else doublewidth=(vga.tandy.mode_control & 0x10)==0;
|
|
vga.draw.blocks=width * (doublewidth ? 4:8);
|
|
width=vga.draw.blocks*2;
|
|
VGA_DrawLine=VGA_Draw_1BPP_Line;
|
|
break;
|
|
case M_TANDY4:
|
|
aspect_ratio=1.2;
|
|
doubleheight=true;
|
|
if (machine==MCH_TANDY) doublewidth=(vga.tandy.mode_control & 0x10)==0;
|
|
else doublewidth=(vga.tandy.mode_control & 0x01)==0x00;
|
|
vga.draw.blocks=width * 2;
|
|
width=vga.draw.blocks*4;
|
|
if ((machine==MCH_TANDY && (vga.tandy.gfx_control & 0x8)) ||
|
|
(machine==MCH_PCJR && (vga.tandy.mode_control==0x0b)))
|
|
VGA_DrawLine=VGA_Draw_2BPPHiRes_Line;
|
|
else VGA_DrawLine=VGA_Draw_2BPP_Line;
|
|
break;
|
|
case M_TANDY16:
|
|
aspect_ratio=1.2;
|
|
doubleheight=true;
|
|
vga.draw.blocks=width*2;
|
|
if (vga.tandy.mode_control & 0x1) {
|
|
if (( machine==MCH_TANDY ) && ( vga.tandy.mode_control & 0x10 )) {
|
|
doublewidth = false;
|
|
vga.draw.blocks*=2;
|
|
width=vga.draw.blocks*2;
|
|
} else {
|
|
doublewidth = true;
|
|
width=vga.draw.blocks*2;
|
|
}
|
|
VGA_DrawLine=VGA_Draw_4BPP_Line;
|
|
} else {
|
|
doublewidth=true;
|
|
width=vga.draw.blocks*4;
|
|
VGA_DrawLine=VGA_Draw_4BPP_Line_Double;
|
|
}
|
|
break;
|
|
case M_TANDY_TEXT:
|
|
doublewidth=(vga.tandy.mode_control & 0x1)==0;
|
|
aspect_ratio=1;
|
|
doubleheight=true;
|
|
vga.draw.blocks=width;
|
|
width<<=3;
|
|
VGA_DrawLine=VGA_TEXT_Draw_Line;
|
|
break;
|
|
case M_HERC_TEXT:
|
|
aspect_ratio=1;
|
|
vga.draw.blocks=width;
|
|
width<<=3;
|
|
VGA_DrawLine=VGA_TEXT_Herc_Draw_Line;
|
|
break;
|
|
default:
|
|
LOG(LOG_VGA,LOG_ERROR)("Unhandled VGA mode %d while checking for resolution",vga.mode);
|
|
break;
|
|
}
|
|
VGA_CheckScanLength();
|
|
if (vga.draw.double_scan) {
|
|
if (IS_VGA_ARCH) height/=2;
|
|
doubleheight=true;
|
|
}
|
|
|
|
if(!(IS_VGA_ARCH && (svgaCard==SVGA_None) && (vga.mode==M_EGA || vga.mode==M_VGA))) {
|
|
//Only check for extra double height in vga modes
|
|
//(line multiplying by address_line_total)
|
|
if (!doubleheight && (vga.mode<M_TEXT) && !(vga.draw.address_line_total & 1)) {
|
|
vga.draw.address_line_total/=2;
|
|
doubleheight=true;
|
|
height/=2;
|
|
}
|
|
}
|
|
vga.draw.lines_total=height;
|
|
vga.draw.parts_lines=vga.draw.lines_total/vga.draw.parts_total;
|
|
vga.draw.line_length = width * ((bpp + 1) / 8);
|
|
#ifdef VGA_KEEP_CHANGES
|
|
vga.changes.active = false;
|
|
vga.changes.frame = 0;
|
|
vga.changes.writeMask = 1;
|
|
#endif
|
|
/*
|
|
Cheap hack to just make all > 640x480 modes have 4:3 aspect ratio
|
|
*/
|
|
if ( width >= 640 && height >= 480 ) {
|
|
aspect_ratio = ((float)width / (float)height) * ( 3.0 / 4.0);
|
|
}
|
|
// LOG_MSG("ht %d vt %d ratio %f", htotal, vtotal, aspect_ratio );
|
|
|
|
if (( width != vga.draw.width) || (height != vga.draw.height) ||
|
|
(aspect_ratio != vga.draw.aspect_ratio) ||
|
|
(vga.mode != vga.lastmode)) {
|
|
vga.lastmode = vga.mode;
|
|
PIC_RemoveEvents(VGA_VerticalTimer);
|
|
PIC_RemoveEvents(VGA_PanningLatch);
|
|
PIC_RemoveEvents(VGA_DisplayStartLatch);
|
|
PIC_RemoveEvents(VGA_DrawPart);
|
|
PIC_RemoveEvents(VGA_DrawSingleLine);
|
|
vga.draw.width = width;
|
|
vga.draw.height = height;
|
|
vga.draw.doublewidth = doublewidth;
|
|
vga.draw.doubleheight = doubleheight;
|
|
vga.draw.aspect_ratio = aspect_ratio;
|
|
if (doubleheight) vga.draw.lines_scaled=2;
|
|
else vga.draw.lines_scaled=1;
|
|
#if C_DEBUG
|
|
LOG(LOG_VGA,LOG_NORMAL)("Width %d, Height %d, fps %f",width,height,fps);
|
|
LOG(LOG_VGA,LOG_NORMAL)("%s width, %s height aspect %f",
|
|
doublewidth ? "double":"normal",doubleheight ? "double":"normal",aspect_ratio);
|
|
#endif
|
|
RENDER_SetSize(width,height,bpp,fps,aspect_ratio,doublewidth,doubleheight);
|
|
vga.draw.delay.framestart = PIC_FullIndex();
|
|
PIC_AddEvent( VGA_VerticalTimer , (float)vga.draw.delay.vtotal );
|
|
vga.draw.lines_done = 0;
|
|
}
|
|
}
|
|
|
|
void VGA_KillDrawing(void) {
|
|
PIC_RemoveEvents(VGA_DrawPart);
|
|
PIC_RemoveEvents(VGA_DrawSingleLine);
|
|
}
|