damage.c


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#include "draw.h"
#include "util.h"

static xenon_rect current_rect;

void damage_add(xenon_rect* region)
{
	int xmin = min(current_rect.x, region->x);
	int xmax = max(current_rect.x + current_rect.w, region->x + region->w);
	int ymin = min(current_rect.y, region->y);
	int ymax = max(current_rect.y + current_rect.h, region->y + region->h);
	current_rect.x = xmin;
	current_rect.w = xmax - xmin;
	current_rect.y = ymin;
	current_rect.h = ymax - ymin;
}

void damage_clear()
{
	current_rect.x = 0;
	current_rect.y = 0;
	current_rect.w = 0;
	current_rect.h = 0;
}

xenon_rect damage_current()
{
	return current_rect;
}