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//http://wiki.osdev.org/GUI
#include <stdarg.h>
#include "kernel/mem.h"
#include "vesa.h"
#include "lib/logger/log.h" // logger facilities
#include "lib/printf/printf.h"
#define FOOLOS_MODULE_NAME "vesa"
//#define FOOLSOS_SHOW_VESAMODES
static foolfont *deffont;
static vbemodeinfo *VbeModeInfoBlock;
static int console_x;
static int console_y;
static int console_lines;
static int console_cols;
static uint8_t* buffer;
static uint8_t* physbase;
void PutConsoleNL();
void PutPixel(int x,int y, int color);
void vesa_switch_buffers()
{
for(int i=0;i<800*600*2;i++)physbase[i]=buffer[i];
}
void vesa_put_rect(int x, int y, int w , int h, int color)
{
for(int i=x;i<x+w;i++)
for(int j=y;j<y+h;j++)
PutPixel(i,j,color);
}
void vesa_clear_screen()
{
vesa_put_rect(0,0,VbeModeInfoBlock->Xres, VbeModeInfoBlock->Yres, 0xffffff);
}
void vesa_set_physbase(uint32_t addr)
{
VbeModeInfoBlock->physbase=addr;
}
//
// We want to get output to the screen as fast as possible!
//
// Our Fool-Boot-Loader did set up VESA already for us.
// The desired VESA mode is hardcoded in [boot/mbr.asm].
//
// The [vesa_init(...)] function requires:
//
// * the addresses of the vbeinfo struct
// * the address of the vbemodeinfo struct (for selected mode).
// * Fool Font loaded inside ramimage
//
// The first two paramters are hardcoded in [boot/mbr.asm],
// while the last one is set in the Makefile. The font binary
// is integrated in the kernel image.
//
// this function returns the physical base address of
// our video memory
//
uint32_t vesa_init(vbeinfo *info,vbemodeinfo *mode,foolfont *rawfont)
{
//the only functionallu important init lines! (rest is log)
VbeModeInfoBlock=mode;
deffont=rawfont;
console_x=0;
console_y=0;
int line_height=12;
int col_width=10;
console_lines=mode->Yres/line_height;
console_cols=mode->Xres/col_width;
// vesa info
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"vbe version: 0x%x / video mode ptr: 0x%x 0x%x",
info->VbeVersion, info->VideoModePtr[1], info->VideoModePtr[0]);
// vesa info on selected mode:
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"colors r:%d 0x%x g:%d 0x%x b:%d 0x%x",
mode->red_position,mode->red_mask,
mode->green_position,mode->green_mask,
mode->blue_position,mode->blue_mask);
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"res: %d * %d / banks: %d / attr: 0x%x",
mode->Xres, mode->Yres, mode->banks, mode->attributes);
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"bpp: %d / physbase: 0x%x",
mode->bpp,mode->physbase);
// vesa modes
// todo: take segment from vbeinfo!
#ifdef FOOLSOS_SHOW_VESAMODES
uint16_t *modeptr=info->VideoModePtr[0];
while(*modeptr!=0xffff&&*modeptr!=0)
{
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"mode supported : 0x%X", (*modeptr));
modeptr++;
}
#endif
return VbeModeInfoBlock->physbase;
}
// TODO: what will happen in 24bit mode?
void PutPixel(int x,int y, int color)
{
//do not write memory outside the screen buffer, check parameters against the VBE mode info
if (x<0 || x>VbeModeInfoBlock->Xres|| y<0 || y>VbeModeInfoBlock->Yres) return;
if (x) x = (x*(VbeModeInfoBlock->bpp>>3)); // get bytes (divide by 8)
if (y) y = (y*VbeModeInfoBlock->pitch);
uint8_t *cTemp=VbeModeInfoBlock->physbase;
cTemp[x+y] = (uint8_t)(color & 0xff);
cTemp[x+y+1] = (uint8_t)((color>>8) & 0xff);
cTemp[x+y+2] = (uint8_t)((color>>16) & 0xff);
}
void PutFont(char c, int x,int y, int color)
{
int fnt=0x126-0x20;
if(c>=0x20&&c<=0x126)fnt=c-0x20;
int posx, posy, sizex=8, sizey=10;
for(posx=x;posx<x+sizex;posx++)
{
for(posy=y;posy<y+sizey;posy++)
{
if(deffont[fnt].line[posy-y]&1<<(7-(posx-x)))
{
PutPixel(posx,posy,color);
}
else
{
PutPixel(posx,posy,0);
}
}
}
}
void PutString(char *str, int x,int y, int color, va_list va)
{
char buff[256];
tfp_sprintf(buff,str,va);
str=buff;
int i=x;
while((*str)!=0)
{
PutFont(*str, i,y, color);
i+=9; // spacing
str++;
}
}
void PutConsoleChar(char c, int color)
{
if(c=='\n')
{
PutConsoleNL();
return;
}
PutFont(c, console_x*10,console_y*12, color);
console_x++;
#ifdef FOOLOS_CONSOLE_AUTOBREAK
if(console_x>=console_cols)PutConsoleNL();
#endif
}
void PutConsole(char *str, int color)
{
while((*str)!=0)
{
PutConsoleChar(*str,color);
str++;
}
}
void PutConsoleNL()
{
console_x=0;
console_y++;
if(console_y>=console_lines-5)console_y=0;
for(int i=0;i<console_cols;i++)
{
PutFont(' ',i*10,(console_y)*12,0);
}
}
static int boxx;
static int boxy;
////////////////
void vesa_render()
{
vesa_clear_screen();
vesa_put_rect(100,100,VbeModeInfoBlock->Xres-200,VbeModeInfoBlock->Yres-200,0xff);
vesa_put_rect(boxx-10,boxy-10,20,20,0x999999);
boxx++;
// boxy+=boxx;
if(boxx>VbeModeInfoBlock->Xres-100)boxx=100;
// if(boxy>VbeModeInfoBlock->Yres-200)boxy=200;
vesa_switch_buffers();
}
/*
void vesa_init_doublebuff()
{
boxx=300;
boxy=300;
int blocks=800*600*2/4096+1;
physbase=VbeModeInfoBlock->physbase;
buffer=pmmngr_alloc_blocks(blocks);
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"Init buffer of %d blocks at 0x%08X",blocks,buffer);
VbeModeInfoBlock->physbase=buffer;
}
*/
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