int main()
{
int err, col, row, i;
if ((err = fbopen()) != 0) {
fprintf(stderr, "Error: Could not open framebuffer: %d\n", err);
exit(1);
}
// Clear the screen before starting
fbclearlines(0, 47);
/* init: Draw 12 bands at distinct frequencies as well as
*the dials in the middle of the bands
*/
for (i = 1 ; i < 13 ; i++) {
for (row = 470; row > 370; row--){
fbputchar('I', row, COL_NUM(i));
}
updatedial(420, COL_NUM(i));
}
//Initialize current cursor state for first column
// The position of the cursor
int keyRow = 420, keyCol = 30;
// Display the cursor
fbputchar(95, keyRow, keyCol);
return 0;
} //end main
//function to print a basic view creating separate
//space for text from the server and input area.
void basicview()
{
int col;
for (col = 0 ; col < 128 ; col++) {
fbputchar('*', 0, col);
fbputchar('*', 43, col);
fbputchar('*', 46, col);
}
}
void updatedial(int row, int col)
{
int i;
fbputchar('*', row, col-1);
fbputchar('*', row, col+1);
for(i = 0; i < 12; i++){
if(dials[i].col == col){
dials[i],row = row;
}
}
}
void fbclearlines(int rowStart, int rowEnd)
{
int i, j;
if (rowStart > MAX_SCREEN_Y + 3) return;
for (i = rowStart ; i < rowEnd && i < MAX_SCREEN_Y + 4; i++)
for (j = 0; j < MAX_SCREEN_X; j++)
fbputchar(32, i, j);
}
/*
* Draw the given string at the given row/column.
* String must fit on a single line: wrap-around is not handled.
*/
void fbputs(const char *s, int row, int col)
{
char c;
while ((c = *s++) != 0){
fbputchar(c, row, col++);
if(col == 127){
col = 0;
row++;
}
}
}
void fbputpacket(char *msg, int *row)
{
int len = strlen(msg);
int needed_rows = (int)ceil(((double) len) / MAX_SCREEN_X) + 1;
if (needed_rows > MAX_SCREEN_Y - 1) {
*row = 2;
fbclearlines(1, MAX_SCREEN_Y - 1);
fbputs("Message too long to display", 1, 0);
return;
}
if (*row + needed_rows > MAX_SCREEN_Y) {
// Mark the beginning of the last blank line
unsigned char *bottom = framebuffer + (*row * FONT_HEIGHT + fb_vinfo.yoffset) * fb_finfo.line_length;
printf("initial position: %p, bottom: %p, byte difference: %d, needed rows: %d\n", framebuffer, (char *)bottom, bottom - framebuffer, needed_rows);
// Mark the position from the beginning of the terminal
unsigned char *top = framebuffer + (1 * FONT_HEIGHT + fb_vinfo.yoffset) * fb_finfo.line_length;
// Mark the new top
unsigned char *new_top = framebuffer + ((1 + needed_rows) * FONT_HEIGHT + fb_vinfo.yoffset) * fb_finfo.line_length;
// Copy the onscreen stuff up
memcpy(top, new_top, bottom - new_top);
// Clear everything below
fbclearlines(*row - needed_rows, MAX_SCREEN_Y);
// Change the value of rows
*row = *row - needed_rows;
}
int col = 0;
while (*msg != 0) {
if (col == 128) {
col = 0;
(*row)++;
}
fbputchar(*msg, *row, col);
msg++;
col++;
}
(*row)++;
}
// When called prints space on all columns between the rows startRow and endRow
// startRow inclusive and endRow exclusive.
void clearscreen(int startRow, int endRow)
{
int x, y;
unsigned char pixels, *pixelp = font + FONT_HEIGHT ;
unsigned char *pixel, *left = framebuffer +
(fb_vinfo.yoffset) * fb_finfo.line_length +
(fb_vinfo.xoffset) * BITS_PER_PIXEL / 8;
for (y = 0 ; y < 128 ; y++, left += fb_finfo.line_length) {
pixels = *pixelp++;
pixel = left;
for (x = startRow ; x < endRow ; x++, pixels <<= 1, pixel += 4)
{
//pixel[0] = 0;
// pixel[1] = 0;
// pixel[2] = 0;
// pixel[3] = 0;
fbputchar(' ', x, y);
}
}
basicview();
}
/*
* Draw the given string at the given row/column.
* String must fit on a single line: wrap-around is not handled.
*/
void fbputs(const char *s, int row, int col)
{
char c;
while ((c = *s++) != 0) fbputchar(c, row, col++);
}
