/* Code based on example taken from:
* http://www.devmaster.net/forums/showthread.php?t=1094 */
static void add_flat_triangle(struct image *image,
int x0, int y0, int x1, int y1, int x2, int y2,
unsigned char mult, const uint16_t add[])
{
unsigned char *buf;
unsigned int i, j;
// compute slopes for the two triangle legs
float dx0 = (float)(x2 - x0) / (y2 - y0);
float dx1 = (float)(x2 - x1) / (y2 - y1);
int yRange = 0;
float lx = (float) x0, rx = (float) x1;
if (y0 < y2) {
yRange = y2 - y0;
buf = image_at(image, 0, y0);
} else {
yRange = y0 - y2;
buf = image_at(image, 0, y2);
lx = rx = (float)x2;
}
for (i=0; i < yRange; ++i) {
for (j=(int)(lx); j<(int)((rx) + 1.0f); ++j)
add_dot(buf + 3 * j, mult, add);
lx += dx0;
rx += dx1;
buf += image->stride;
}
}
/**
* @brief Gets current cell
* @param void
* @return char - Cell pattern with 2 MSB as controls for ENTER, LEFT, RIGHT
* terminated cell entry, WITH_CANCEL for CANCEL and NO_DOTS when nothing to
* return (wait)
*/
char get_cell(void) {
char last_dot = get_dot();
char ret_val = NO_DOTS;
switch(last_dot) {
case NO_DOTS:
return NO_DOTS;
break;
// If one of the dots, then add to cell state
case '1': case '2': case '3': case '4': case '5': case '6':
io_cell_state = add_dot(io_cell_state, last_dot);
return NO_DOTS;
break;
// If a control is pressed, return cell state with control preserved in
// 2 MSB of char
case ENTER: case LEFT: case RIGHT: case CANCEL:
ret_val = io_cell_state;
io_cell_state = NO_DOTS;
switch (last_dot) {
case ENTER:
io_user_cancel = false;
io_user_abort = false;
log_msg("[IO] Cell pattern: %x\n\r",
ret_val | WITH_ENTER);
return ret_val | WITH_ENTER;
break;
case LEFT:
io_user_cancel = false;
io_user_abort = false;
return ret_val | WITH_LEFT;
break;
case RIGHT:
io_user_cancel = false;
io_user_abort = false;
return ret_val | WITH_RIGHT;
break;
case CANCEL:
if (ret_val == 0x00) {
if (io_user_cancel == true) {
io_user_abort = true;
io_user_cancel = false;
} else {
io_user_cancel = true;
io_user_abort = false;
}
}
return ret_val | WITH_CANCEL;
break;
// Should not execute this code
default:
log_msg("[IO] Invalid dot: %x\n\r", last_dot);
quit_mode();
return NO_DOTS;
break;
}
break;
// Should not execute this code
default:
log_msg("[IO] Invalid dot: %x\n\r", last_dot);
quit_mode();
return NO_DOTS;
break;
}
}