39 lines
642 B
C++
39 lines
642 B
C++
#include "image.h"
|
|
|
|
bool check_bounds(image_t* p, int x, int y) {
|
|
if (p == NULL) {
|
|
return false;
|
|
}
|
|
|
|
if ((x < 0) || (y < 0)) {
|
|
return false;
|
|
}
|
|
|
|
if ((x > p->width) || (y > p->height)) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
byte get_pixel(image_t* p, int x, int y) {
|
|
if (check_bounds(p, x, y) == false) {
|
|
return 0;
|
|
}
|
|
return p->data[y * p->width + x];
|
|
}
|
|
|
|
void set_pixel(image_t* p, int x, int y, byte value) {
|
|
if (check_bounds(p, x, y) == false) {
|
|
return;
|
|
}
|
|
p->data[y * p->width + x] = value;
|
|
}
|
|
|
|
void clear_pixels(image_t* p) {
|
|
if (p == NULL) {
|
|
return;
|
|
}
|
|
memset(p->data, 0, sizeof(p->data));
|
|
}
|