diff options
Diffstat (limited to 'src/c/vga.c')
| -rw-r--r-- | src/c/vga.c | 25 |
1 files changed, 13 insertions, 12 deletions
diff --git a/src/c/vga.c b/src/c/vga.c index e61cd7f..67c8b02 100644 --- a/src/c/vga.c +++ b/src/c/vga.c @@ -12,12 +12,12 @@ void set_color(enum vga_color fg, enum vga_color bg) { terminal_color = fg | bg << 4; } - + static inline uint16_t vga_entry(unsigned char uc, uint8_t color) { return (uint16_t) uc | (uint16_t) color << 8; } - + void terminal_initialize() { terminal_row=0; @@ -26,11 +26,11 @@ void terminal_initialize() terminal_buffer=(uint16_t*) 0xB8000; for(size_t y=0;y<VGA_HEIGHT;y++) { - for(size_t x=0;x<VGA_WIDTH;x++) - { - const size_t index=y*VGA_WIDTH+x; - terminal_buffer[index]=vga_entry(' ', terminal_color); - } + for(size_t x=0;x<VGA_WIDTH;x++) + { + const size_t index=y*VGA_WIDTH+x; + terminal_buffer[index]=vga_entry(' ', terminal_color); + } } } @@ -43,7 +43,8 @@ void terminal_putentryat(char c, uint8_t color, size_t x, size_t y) void movescreen() { terminal_row--; - for(size_t i=0;i<VGA_HEIGHT;i++) for(size_t j=0;j<VGA_WIDTH;j++) terminal_buffer[i*VGA_WIDTH+j]=terminal_buffer[(i+1)*VGA_WIDTH+j]; + for(size_t i=0;i<VGA_HEIGHT;i++) for(size_t j=0;j<VGA_WIDTH;j++) + terminal_buffer[i*VGA_WIDTH+j]=terminal_buffer[(i+1)*VGA_WIDTH+j]; } void next_field() @@ -56,18 +57,18 @@ void previous_field() if(terminal_column) terminal_column--; else terminal_row--,terminal_column=VGA_WIDTH-1; } - + void terminal_putchar(char c) { if(c=='\n') terminal_column=0,terminal_row++; else { - terminal_putentryat(c, terminal_color, terminal_column, terminal_row); - next_field(); + terminal_putentryat(c, terminal_color, terminal_column, terminal_row); + next_field(); } if (terminal_row==VGA_HEIGHT) movescreen(); } - + void terminal_writestring(char* data) { for(int i=0;data[i]!='\0';i++) terminal_putchar(data[i]); |