64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
#define GINT_NEED_VRAM
|
|
#include <gint/display.h>
|
|
#include <gint/defs/util.h>
|
|
#include <display/fx.h>
|
|
|
|
/* dhline() - optimized drawing of a horizontal line using a rectangle mask */
|
|
void dhline(int x1, int x2, int y, color_t color)
|
|
{
|
|
if((uint)y >= 64) return;
|
|
if(x1 > x2) swap(x1, x2);
|
|
|
|
/* Get the masks for the [x1, x2] range */
|
|
uint32_t m[4];
|
|
masks(x1, x2, m);
|
|
|
|
uint32_t *data = vram + (y << 2);
|
|
|
|
if(color == color_white)
|
|
{
|
|
data[0] &= ~m[0];
|
|
data[1] &= ~m[1];
|
|
data[2] &= ~m[2];
|
|
data[3] &= ~m[3];
|
|
}
|
|
else if(color == color_black)
|
|
{
|
|
data[0] |= m[0];
|
|
data[1] |= m[1];
|
|
data[2] |= m[2];
|
|
data[3] |= m[3];
|
|
}
|
|
else if(color == color_invert)
|
|
{
|
|
data[0] ^= m[0];
|
|
data[1] ^= m[1];
|
|
data[2] ^= m[2];
|
|
data[3] ^= m[3];
|
|
}
|
|
}
|
|
|
|
/* dvline() - optimized drawing of a vertical line */
|
|
void dvline(int y1, int y2, int x, color_t color)
|
|
{
|
|
if((uint)x >= 128) return;
|
|
if(y1 > y2) swap(y1, y2);
|
|
|
|
uint32_t *base = vram + (y1 << 2) + (x >> 5);
|
|
uint32_t *lword = base + ((y2 - y1 + 1) << 2);
|
|
uint32_t mask = 1 << (~x & 31);
|
|
|
|
if(color == color_white)
|
|
{
|
|
while(lword > base) lword -= 4, *lword &= ~mask;
|
|
}
|
|
else if(color == color_black)
|
|
{
|
|
while(lword > base) lword -= 4, *lword |= mask;
|
|
}
|
|
else if(color == color_invert)
|
|
{
|
|
while(lword > base) lword -= 4, *lword ^= mask;
|
|
}
|
|
}
|