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simplified write_cell_fb interface logic for drivers by removing u16 cell parameter

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This commit is contained in:
shockrah 2019-09-16 13:58:11 -07:00
parent 02e6b3f7b6
commit 6f25710ca9
3 changed files with 8 additions and 9 deletions
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12
framebuffer.c
View File

@ -10,19 +10,19 @@
// State trackers from header
static u8* Frame_Buffer = (u8*)FRAME_BUFFER_ADDR;
s32 Frame_Buffer_Cursor = 0;
s32 Frame_Buffer_Cursor = 0x0000;
// Writes character to a given cell in the framebuffer
// @cell parameter is the logical (linear)index into the buffer
void write_cell_fb(u16 cell, u8 c, u8 fg, u8 bg) {
Frame_Buffer[cell] = c;
Frame_Buffer[cell+1] = (fg & 0x0f << 4) | (bg & 0x0f);
Frame_Buffer_Cursor++;
void write_cell_fb(u8 c, u8 fg, u8 bg) {
Frame_Buffer[Frame_Buffer_Cursor] = c;
Frame_Buffer[Frame_Buffer_Cursor+1] = (fg & 0x0f << 4) | (bg & 0x0f);
Frame_Buffer_Cursor += 2;
}
void clear_fb(void) {
for(unsigned cell=0;cell<AREA; cell+=2) {
write_cell_fb(cell, ' ', 0x00, 0x00);
write_cell_fb(' ', 0x00, 0x00);
}
}

2
framebuffer.h
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@ -38,7 +38,7 @@
extern s32 Frame_Buffer_Cursor;
void write_cell_fb(u16, u8, u8, u8);
void write_cell_fb(u8, u8, u8);
void clear_fb(void);

3
stlio.c
View File

@ -1,10 +1,9 @@
#include "stlio.h"
u64 write(const s8* buffer, const u64 size) {
s32 offset = Frame_Buffer_Cursor;
u64 i;
for(i = 0; i < size; i++) {
write_cell_fb((u64)offset + i, buffer[i], Green, White);
write_cell_fb(buffer[i], Green, White);
}
return i;
}