/* * Copyright (C) 2002-2009 The DOSBox Team * * 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. */ /* $Id: vga_draw.cpp,v 1.107 2009/04/11 08:02:23 qbix79 Exp $ */ #include #include #include "dosbox.h" #include "video.h" #include "render.h" #include "../gui/render_scalers.h" #include "vga.h" #include "pic.h" #define VGA_PARTS 4 typedef Bit8u * (* VGA_Line_Handler)(Bitu vidstart, Bitu line); static VGA_Line_Handler VGA_DrawLine; static Bit8u TempLine[SCALER_MAXWIDTH * 4]; static Bit8u * VGA_Draw_1BPP_Line(Bitu vidstart, Bitu line) { const Bit8u *base = vga.tandy.draw_base + ((line & vga.tandy.line_mask) << vga.tandy.line_shift); Bit32u *draw = (Bit32u *)TempLine; for (Bitu x=vga.draw.blocks;x>0;x--, vidstart++) { Bitu val = base[(vidstart & (8 * 1024 -1))]; *draw++=CGA_2_Table[val >> 4]; *draw++=CGA_2_Table[val & 0xf]; } return TempLine; } static Bit8u * VGA_Draw_2BPP_Line(Bitu vidstart, Bitu line) { const Bit8u *base = vga.tandy.draw_base + ((line & vga.tandy.line_mask) << vga.tandy.line_shift); Bit32u * draw=(Bit32u *)TempLine; for (Bitu x=0;x>4)|(val2&0xf0)]; *draw++=CGA_4_HiRes_Table[(val1&0x0f)|((val2&0x0f)<<4)]; } return TempLine; } static Bitu temp[643]={0}; static Bit8u * VGA_Draw_CGA16_Line(Bitu vidstart, Bitu line) { const Bit8u *base = vga.tandy.draw_base + ((line & vga.tandy.line_mask) << vga.tandy.line_shift); const Bit8u *reader = base + vidstart; Bit32u * draw=(Bit32u *)TempLine; //Generate a temporary bitline to calculate the avarage //over bit-2 bit-1 bit bit+1. //Combine this number with the current colour to get //an unigue index in the pallete. Or it with bit 7 as they are stored //in the upperpart to keep them from interfering the regular cga stuff for(Bitu x = 0; x < 640; x++) temp[x+2] = (( reader[(x>>3)] >> (7-(x&7)) )&1) << 4; //shift 4 as that is for the index. Bitu i = 0,temp1,temp2,temp3,temp4; for (Bitu x=0;x>= 4; temp1 = temp[i] + temp[i+1] + temp[i+2] + temp[i+3]; i++; temp2 = temp[i] + temp[i+1] + temp[i+2] + temp[i+3]; i++; temp3 = temp[i] + temp[i+1] + temp[i+2] + temp[i+3]; i++; temp4 = temp[i] + temp[i+1] + temp[i+2] + temp[i+3]; i++; *draw++ = 0x80808080|(temp1|val1) | ((temp2|val1) << 8) | ((temp3|val1) <<16) | ((temp4|val1) <<24); temp1 = temp[i] + temp[i+1] + temp[i+2] + temp[i+3]; i++; temp2 = temp[i] + temp[i+1] + temp[i+2] + temp[i+3]; i++; temp3 = temp[i] + temp[i+1] + temp[i+2] + temp[i+3]; i++; temp4 = temp[i] + temp[i+1] + temp[i+2] + temp[i+3]; i++; *draw++ = 0x80808080|(temp1|val2) | ((temp2|val2) << 8) | ((temp3|val2) <<16) | ((temp4|val2) <<24); } return TempLine; } static Bit8u * VGA_Draw_4BPP_Line(Bitu vidstart, Bitu line) { const Bit8u *base = vga.tandy.draw_base + ((line & vga.tandy.line_mask) << vga.tandy.line_shift); Bit32u * draw=(Bit32u *)TempLine; for (Bitu x=0;x> 4 | (val2 & 0x0f) << 24 | (val2 & 0xf0) << 12; } return TempLine; } static Bit8u * VGA_Draw_4BPP_Line_Double(Bitu vidstart, Bitu line) { const Bit8u *base = vga.tandy.draw_base + ((line & vga.tandy.line_mask) << vga.tandy.line_shift); Bit32u * draw=(Bit32u *)TempLine; for (Bitu x=0;x> 4 | (val & 0xf0) << 4 | (val & 0x0f) << 16 | (val & 0x0f) << 24; } return TempLine; } #ifdef VGA_KEEP_CHANGES static Bit8u * VGA_Draw_Changes_Line(Bitu vidstart, Bitu line) { Bitu checkMask = vga.changes.checkMask; Bit8u *map = vga.changes.map; Bitu start = (vidstart >> VGA_CHANGE_SHIFT); Bitu end = ((vidstart + vga.draw.line_length ) >> VGA_CHANGE_SHIFT); for (; start <= end;start++) { if ( map[start] & checkMask ) { Bitu offset = vidstart & vga.draw.linear_mask; if(vga.draw.linear_mask-offset < vga.draw.line_length) memcpy(vga.draw.linear_base+vga.draw.linear_mask+1, vga.draw.linear_base, vga.draw.line_length); Bit8u *ret = &vga.draw.linear_base[ offset ]; #if !defined(C_UNALIGNED_MEMORY) if (GCC_UNLIKELY( ((Bitu)ret) & (sizeof(Bitu)-1)) ) { memcpy( TempLine, ret, vga.draw.line_length ); return TempLine; } #endif return ret; } } // memset( TempLine, 0x30, vga.changes.lineWidth ); // return TempLine; return 0; } #endif static Bit8u * VGA_Draw_Linear_Line(Bitu vidstart, Bitu /*line*/) { // There is guaranteed extra memory past the wrap boundary. So, instead of using temporary // storage just copy appropriate chunk from the beginning to the wrap boundary when needed. Bitu offset = vidstart & vga.draw.linear_mask; if (vga.draw.linear_mask-offset < vga.draw.line_length) memcpy(vga.draw.linear_base+vga.draw.linear_mask+1, vga.draw.linear_base, vga.draw.line_length); Bit8u *ret = &vga.draw.linear_base[ offset ]; #if !defined(C_UNALIGNED_MEMORY) if (GCC_UNLIKELY( ((Bitu)ret) & (sizeof(Bitu)-1)) ) { memcpy( TempLine, ret, vga.draw.line_length ); return TempLine; } #endif return ret; } static Bit8u * VGA_Draw_Xlat16_Linear_Line(Bitu vidstart, Bitu /*line*/) { Bit8u *ret = &vga.draw.linear_base[ vidstart & vga.draw.linear_mask ]; Bit16u* temps = (Bit16u*) TempLine; for(Bitu i = 0; i < vga.draw.line_length; i++) { temps[i]=vga.dac.xlat16[ret[i]]; } return TempLine; /* #if !defined(C_UNALIGNED_MEMORY) if (GCC_UNLIKELY( ((Bitu)ret) & (sizeof(Bitu)-1)) ) { memcpy( TempLine, ret, vga.draw.line_length ); return TempLine; } #endif return ret;*/ } //Test version, might as well keep it /* static Bit8u * VGA_Draw_Chain_Line(Bitu vidstart, Bitu line) { Bitu i = 0; for ( i = 0; i < vga.draw.width;i++ ) { Bitu addr = vidstart + i; TempLine[i] = vga.mem.linear[((addr&~3)<<2)+(addr&3)]; } return TempLine; } */ static Bit8u * VGA_Draw_VGA_Line_HWMouse( Bitu vidstart, Bitu /*line*/) { if (!svga.hardware_cursor_active || !svga.hardware_cursor_active()) // HW Mouse not enabled, use the tried and true call return &vga.mem.linear[vidstart]; Bitu lineat = (vidstart-(vga.config.real_start<<2)) / vga.draw.width; if ((vga.s3.hgc.posx >= vga.draw.width) || (lineat < vga.s3.hgc.originy) || (lineat > (vga.s3.hgc.originy + (63U-vga.s3.hgc.posy))) ) { // the mouse cursor *pattern* is not on this line return &vga.mem.linear[ vidstart ]; } else { // Draw mouse cursor: cursor is a 64x64 pattern which is shifted (inside the // 64x64 mouse cursor space) to the right by posx pixels and up by posy pixels. // This is used when the mouse cursor partially leaves the screen. // It is arranged as bitmap of 16bits of bitA followed by 16bits of bitB, each // AB bits corresponding to a cursor pixel. The whole map is 8kB in size. memcpy(TempLine, &vga.mem.linear[ vidstart ], vga.draw.width); // the index of the bit inside the cursor bitmap we start at: Bitu sourceStartBit = ((lineat - vga.s3.hgc.originy) + vga.s3.hgc.posy)*64 + vga.s3.hgc.posx; // convert to video memory addr and bit index // start adjusted to the pattern structure (thus shift address by 2 instead of 3) // Need to get rid of the third bit, so "/8 *2" becomes ">> 2 & ~1" Bitu cursorMemStart = ((sourceStartBit >> 2)& ~1) + (((Bit32u)vga.s3.hgc.startaddr) << 10); Bitu cursorStartBit = sourceStartBit & 0x7; // stay at the right position in the pattern if (cursorMemStart & 0x2) cursorMemStart--; Bitu cursorMemEnd = cursorMemStart + ((64-vga.s3.hgc.posx) >> 2); Bit8u* xat = &TempLine[vga.s3.hgc.originx]; // mouse data start pos. in scanline for (Bitu m = cursorMemStart; m < cursorMemEnd; (m&1)?(m+=3):m++) { // for each byte of cursor data Bit8u bitsA = vga.mem.linear[m]; Bit8u bitsB = vga.mem.linear[m+2]; for (Bit8u bit=(0x80 >> cursorStartBit); bit != 0; bit >>= 1) { // for each bit cursorStartBit=0; // only the first byte has some bits cut off if (bitsA&bit) { if (bitsB&bit) *xat ^= 0xFF; // Invert screen data //else Transparent } else if (bitsB&bit) { *xat = vga.s3.hgc.forestack[0]; // foreground color } else { *xat = vga.s3.hgc.backstack[0]; } xat++; } } return TempLine; } } static Bit8u * VGA_Draw_LIN16_Line_HWMouse(Bitu vidstart, Bitu /*line*/) { if (!svga.hardware_cursor_active || !svga.hardware_cursor_active()) return &vga.mem.linear[vidstart]; Bitu lineat = ((vidstart-(vga.config.real_start<<2)) >> 1) / vga.draw.width; if ((vga.s3.hgc.posx >= vga.draw.width) || (lineat < vga.s3.hgc.originy) || (lineat > (vga.s3.hgc.originy + (63U-vga.s3.hgc.posy))) ) { return &vga.mem.linear[vidstart]; } else { memcpy(TempLine, &vga.mem.linear[ vidstart ], vga.draw.width*2); Bitu sourceStartBit = ((lineat - vga.s3.hgc.originy) + vga.s3.hgc.posy)*64 + vga.s3.hgc.posx; Bitu cursorMemStart = ((sourceStartBit >> 2)& ~1) + (((Bit32u)vga.s3.hgc.startaddr) << 10); Bitu cursorStartBit = sourceStartBit & 0x7; if (cursorMemStart & 0x2) cursorMemStart--; Bitu cursorMemEnd = cursorMemStart + ((64-vga.s3.hgc.posx) >> 2); Bit16u* xat = &((Bit16u*)TempLine)[vga.s3.hgc.originx]; for (Bitu m = cursorMemStart; m < cursorMemEnd; (m&1)?(m+=3):m++) { // for each byte of cursor data Bit8u bitsA = vga.mem.linear[m]; Bit8u bitsB = vga.mem.linear[m+2]; for (Bit8u bit=(0x80 >> cursorStartBit); bit != 0; bit >>= 1) { // for each bit cursorStartBit=0; if (bitsA&bit) { // byte order doesn't matter here as all bits get flipped if (bitsB&bit) *xat ^= ~0U; //else Transparent } else if (bitsB&bit) { // Source as well as destination are Bit8u arrays, // so this should work out endian-wise? *xat = *(Bit16u*)vga.s3.hgc.forestack; } else { *xat = *(Bit16u*)vga.s3.hgc.backstack; } xat++; } } return TempLine; } } static Bit8u * VGA_Draw_LIN32_Line_HWMouse(Bitu vidstart, Bitu /*line*/) { if (!svga.hardware_cursor_active || !svga.hardware_cursor_active()) return &vga.mem.linear[vidstart]; Bitu lineat = ((vidstart-(vga.config.real_start<<2)) >> 2) / vga.draw.width; if ((vga.s3.hgc.posx >= vga.draw.width) || (lineat < vga.s3.hgc.originy) || (lineat > (vga.s3.hgc.originy + (63U-vga.s3.hgc.posy))) ) { return &vga.mem.linear[ vidstart ]; } else { memcpy(TempLine, &vga.mem.linear[ vidstart ], vga.draw.width*4); Bitu sourceStartBit = ((lineat - vga.s3.hgc.originy) + vga.s3.hgc.posy)*64 + vga.s3.hgc.posx; Bitu cursorMemStart = ((sourceStartBit >> 2)& ~1) + (((Bit32u)vga.s3.hgc.startaddr) << 10); Bitu cursorStartBit = sourceStartBit & 0x7; if (cursorMemStart & 0x2) cursorMemStart--; Bitu cursorMemEnd = cursorMemStart + ((64-vga.s3.hgc.posx) >> 2); Bit32u* xat = &((Bit32u*)TempLine)[vga.s3.hgc.originx]; for (Bitu m = cursorMemStart; m < cursorMemEnd; (m&1)?(m+=3):m++) { // for each byte of cursor data Bit8u bitsA = vga.mem.linear[m]; Bit8u bitsB = vga.mem.linear[m+2]; for (Bit8u bit=(0x80 >> cursorStartBit); bit != 0; bit >>= 1) { // for each bit cursorStartBit=0; if (bitsA&bit) { if (bitsB&bit) *xat ^= ~0U; //else Transparent } else if (bitsB&bit) { *xat = *(Bit32u*)vga.s3.hgc.forestack; } else { *xat = *(Bit32u*)vga.s3.hgc.backstack; } xat++; } } return TempLine; } } static Bit32u FontMask[2]={0xffffffff,0x0}; static Bit8u * VGA_TEXT_Draw_Line(Bitu vidstart, Bitu line) { Bits font_addr; Bit32u * draw=(Bit32u *)TempLine; const Bit8u *vidmem = &vga.tandy.draw_base[vidstart]; for (Bitu cx=0;cx> 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]; *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 (linevga.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.tandy.draw_base[vidstart]; for (Bitu cx=0;cx> 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 (linevga.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_Xlat16_Draw_Line(Bitu vidstart, Bitu line) { Bits font_addr; Bit16u * draw=(Bit16u *)TempLine; const Bit8u *vidmem = &vga.tandy.draw_base[vidstart]; for (Bitu cx=0;cx> 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 (linevga.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.tandy.draw_base[vidstart]; Bit8u chr=vidmem[0]; Bit8u col=vidmem[1]; Bit8u font=(vga.draw.font_tables[(col >> 3)&1][chr*32+line])<>4]&0xff); Bitu draw_blocks=vga.draw.blocks; draw_blocks++; for (Bitu cx=1;cx>(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])<> 1; if (font_addr>=0 && font_addr<(Bits)vga.draw.blocks) { if (linevga.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.tandy.draw_base[vidstart]; Bit8u chr=vidmem[0]; Bit8u col=vidmem[1]; Bit8u font=(vga.draw.font_tables[(col >> 3)&1][chr*32+line])<>4]&0xff); Bitu draw_blocks=vga.draw.blocks; draw_blocks++; for (Bitu cx=1;cx>(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])<> 1; if (font_addr>=0 && font_addr<(Bits)vga.draw.blocks) { if (linevga.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 || (!(vga.mode==M_VGA || vga.mode==M_EGA))) { 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: if ((IS_VGA_ARCH) && (svgaCard==SVGA_None)) vga.draw.byte_panning_shift = 2; else vga.draw.byte_panning_shift = 0; if ((IS_VGA_ARCH) && (svgaCard==SVGA_None)) vga.draw.address = vga.config.real_start * 2; else vga.draw.address = vga.config.display_start * 2; vga.draw.address += vga.draw.bytes_skip*vga.draw.byte_panning_shift; case M_TANDY_TEXT: case M_HERC_TEXT: vga.draw.cursor.address=vga.config.cursor_start*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; } } #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>=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 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); }