feat: ajout de nombreuses fonctionnalité pour l'affichage en mode texte
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lib/vgatxt.c
176
lib/vgatxt.c
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@ -1,88 +1,156 @@
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#include "vga.h"
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#include "string.h"
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#include "memory.h"
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#include "port.h"
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#include "asm.h"
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#include "modes.c"
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#include "8x8fnt.c"
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#include "fonts.c"
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#define sequencer 0x3c4
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#define misc 0x3c2
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#define ccrt 0x3D4
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#define attribs 0x3c0
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#define graphics 0x3ce
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#define state 0x3da
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#define sequencer 0x3c4
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#define misc 0x3c2
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#define ccrt 0x3D4
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#define attribs 0x3c0
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#define graphics 0x3ce
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#define state 0x3da
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static u16 resX,resY,cursX,cursY; /* resolution x,y en caractères et position du curseur */
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static u16 pages,pagesize,activepage,showedpage;/* nombre de pages disponibles et taille d'une page ansi que la page active et affiché en cours*/
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static u8 vmode=0xFF; /* mode en cours d'utilisation */
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static u32 basemem; /* debut de la mémoire vidéo */
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static bool scrolling,graphic; /* Activation du défilement, Flag du mode graphique */
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static u8 font; /* n° font actuelle */
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static u16 resX,resY,cursX,cursY; /* resolution x,y en caractères et position du curseur */
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static u16 pages,pagesize,activepage; /* nombre de pages disponibles et taille d'une page */
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static u8 vmode; /* mode en cours d'utilisation */
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static u16 basemem; /* debut de la mémoire vidéo */
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static bool scrolling,graphic; /* Activation du défilement, Flag du mode graphique */
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void print (u8* string)
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void showchar (u8 thechar)
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{
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u8 *source,*screen;
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source = string;
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screen = (u8 *)TEXTSCREEN;
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while(*source!=0x00)
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u8 *screen;
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screen = (u8 *)basemem+activepage*pagesize+2*(cursX+cursY*resX);
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*screen = thechar;
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*(++screen) = 0x07;
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if (cursX++>=resX)
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{
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*screen = *source;
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screen+=2;
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source++;
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cursX=0;
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cursY++;
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}
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gotoscreen(cursX,cursY);
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}
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void cls (void)
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void print (char* string)
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{
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memset((u8 *)TEXTSCREEN,0x20,(80*25*2),2);
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u8 *source;
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source = string;
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while(*source!=0x00) showchar (*source++);
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}
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void showhex (u8 src)
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{
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static u8 hexadigit[16] = "0123456789ABCDEF";
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showchar(hexadigit[(src&0xF0)>>4]);
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showchar(hexadigit[src&0x0F]);
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}
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void clearscreen (void)
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{
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gotoscreen(0,0);
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memset((u8 *)(basemem+activepage*pagesize),0,2*(resY*resX),1);
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}
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void gotoscreen(u16 x,u16 y)
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{
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u16 pos;
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pos=(cursX+cursY*resX)/2;
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cursX=x;
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cursY=y;
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outb(ccrt,0x0E);
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outb(ccrt+1,(u8)(pos&0x00FF));
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outb(ccrt,0x0D);
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outb(ccrt+1,(u8)((pos&0xFF00)>>8));
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}
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void fillscreen (u8 color)
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{
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memset((u8 *)(basemem+activepage*pagesize+1),color,resY*resX,2);
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}
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void loadfont(u8 num,u8 *font,u8 size)
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{
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u16 seqinit[4] = { 0x0100, 0x0402, 0x0704, 0x0300 },
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graphinit[3] = { 0x0204, 0x0005, 0x0006 },
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seqend [4] = { 0x0100, 0x0302, 0x0304, 0x0300 },
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graphend[3] = { 0x0004, 0x1005, 0x0E06 };
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u8 *dest,*src;
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u8 i;
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dest=(u8 *)GRPHSCREEN;
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src=font;
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initreg(sequencer,(u8 *)seqinit ,4);
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initreg(graphics ,(u8 *)graphinit,3);
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if (num>3)
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dest+= (((num-4)<<1)+1)<<13;
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else
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dest+=num<<14;
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for(i=0;i<250;i++)
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{
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memcpy(dest,src,size);
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src+=size;
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dest+=size;
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memset(dest,0,(32-size),1);
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dest+=(32-size);
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}
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initreg(sequencer,(u8 *)seqend ,4);
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initreg(graphics ,(u8 *)graphend,3);
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}
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u8 getfont(u8 num)
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{
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return font;
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}
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void setfont(u8 num)
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{
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font=num&0x07;
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outb(sequencer,3);
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outb(sequencer+1,num&0x03+(num&(0x04)<<2));
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}
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u16 setvmode(u8 choosedmode)
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{
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u8 *def,i,mode;
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mode=choosedmode&0x7F;
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u8 *def,mode;
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mode=(choosedmode&0x7F);
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if (vmode==0xFF)
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{
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loadfont(1 ,(u8 *)font8x8, 8);
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}
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if (choosedmode>0x7F)
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{
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if (mode>maxgraphmode) return 1; /* mode inexistant */
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if (mode>=maxgraphmode) return 1; /* mode inexistant */
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def=(u8 *)&graphmodes[mode];
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graphic=true;
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}
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else
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{
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if (mode>maxtextmode) return 1; /* mode inexistant */
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if (mode>=maxtextmode) return 1; /* mode inexistant */
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def=(u8 *)&textmodes[mode];
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graphic=false;
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}
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outb(misc,*def++);
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outb(state,*def++);
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for(i=0;i<5;i++)
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{
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outb(sequencer,i);
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outb(sequencer+1,*def++);
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}
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outb(misc,def[0]);
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outb(state,def[1]);
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outreg(sequencer,&def[2],5);
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outb(ccrt,0x11);
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outb(ccrt+1,0x0E);
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for(i=0;i<25;i++)
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{
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outb(ccrt,i);
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outb(ccrt+1,*def++);
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}
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for(i=0;i<9;i++)
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{
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outb(graphics,i);
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outb(graphics+1,*def++);
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}
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inb(state);
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for(i=0;i<21;i++)
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{
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inb(attribs);
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outb(attribs,i);
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outb(attribs,*def++);
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}
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outreg(ccrt,&def[7],25);
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outreg(graphics,&def[32],9);
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inb(state);
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outregsame(attribs,&def[41],21);
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outb(attribs,0x20);
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resX=def[63];
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resY=def[64];
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cursX=0;
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cursY=0;
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pagesize=2*resX*resY;
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activepage=0;
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vmode=mode;
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pages=32768/pagesize;
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basemem=(def[21]<<8)+def[22]+TEXTSCREEN;
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return 0;
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}
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