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#include <stdint.h>
#define VESA_FRAMEBUFFER 0xf6000000
#define VESA_PITCH 2560
#define VESA_BPP 4
//https://forum.osdev.org/viewtopic.php?t=10018&p=64358
// TODO: what will happen in 24bit mode?
volatile int c;
int delay()
{
c++;
}
void put_pixel(int x,int y, uint32_t color)
{
//do not write memory outside the screen buffer, check parameters against the VBE mode info
//if (x<0 || x>vesaXres|| y<0 || y>vesaYres) return;
//if (x) x = (x*(VESA_BPP>>3)); // get bytes (divide by 8)
//if (y) y = (y*VESA_PITCH);
//uint8_t *cTemp=VbeModeInfoBlock->physbase;
uint8_t *p=VESA_FRAMEBUFFER+y*VESA_PITCH+x*VESA_BPP;
uint32_t *pix=p;
*pix=color;
// for(int i=0;i<100;i++)delay();
}
void put_pixel_old(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>vesaXres|| y<0 || y>vesaYres) return;
if (x) x = (x*VESA_BPP); // get bytes (divide by 8)
if (y) y = (y*VESA_PITCH);
//uint8_t *cTemp=VbeModeInfoBlock->physbase;
uint8_t *cTemp=VESA_FRAMEBUFFER;
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);
}
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