60 lines
1.1 KiB
C
60 lines
1.1 KiB
C
#define GINT_NEED_VRAM
|
|
#include <gint/defs/util.h>
|
|
#include <gint/display.h>
|
|
|
|
/* drect() - fill a rectangle of the screen */
|
|
void drect(int x1, int y1, int x2, int y2, uint16_t color)
|
|
{
|
|
if(x1 > x2) swap(x1, x2);
|
|
if(y1 > y2) swap(y1, y2);
|
|
|
|
/* Order and bounds */
|
|
if(x1 >= 396 || x2 < 0 || y1 >= 224 || y2 < 0) return;
|
|
if(x1 < 0) x1 = 0;
|
|
if(x2 >= 396) x2 = 395;
|
|
if(y1 < 0) y1 = 0;
|
|
if(y2 >= 224) y2 = 223;
|
|
|
|
/* The method is exactly like dhline(). I first handle odd endpoints,
|
|
then write longwords for the longest section */
|
|
|
|
uint16_t *base = vram + 396 * y1;
|
|
int height = y2 - y1 + 1;
|
|
|
|
/* Do borders first if there are at an odd position */
|
|
|
|
if(x1 & 1)
|
|
{
|
|
uint16_t *v = base;
|
|
for(int h = height; h; h--)
|
|
{
|
|
v[x1] = color;
|
|
v += 396;
|
|
}
|
|
x1++;
|
|
}
|
|
|
|
if(x2 & 1) x2++;
|
|
else
|
|
{
|
|
uint16_t *v = base;
|
|
for(int h = height; h; h--)
|
|
{
|
|
v[x2] = color;
|
|
v += 396;
|
|
}
|
|
}
|
|
|
|
/* Now copy everything that's left as longwords */
|
|
|
|
uint32_t *v = (void *)(base + x1);
|
|
uint32_t op = (color << 16) | color;
|
|
int width = (x2 - x1) >> 1;
|
|
|
|
for(int h = height; h; h--)
|
|
{
|
|
for(int w = 0; w < width; w++) v[w] = op;
|
|
v += 198;
|
|
}
|
|
}
|