22 lines
462 B
C
22 lines
462 B
C
#include <internals/display.h>
|
|
#include <display.h>
|
|
|
|
/*
|
|
dclear_area()
|
|
Clears an area of the vram using rectangle masks. Both (x1, y1) and
|
|
(x2, y2) are cleared.
|
|
*/
|
|
void dclear_area(int x1, int y1, int x2, int y2)
|
|
{
|
|
uint32_t masks[4];
|
|
adjustRectangle(&x1, &y1, &x2, &y2);
|
|
getMasks(x1, x2, masks);
|
|
|
|
int begin = y1 << 2;
|
|
int end = (y2 + 1) << 2;
|
|
int i;
|
|
|
|
for(i = 0; i < 4; i++) masks[i] = ~masks[i];
|
|
for(i = begin; i < end; i++) vram[i] &= masks[i & 3];
|
|
}
|