#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;
	}
}