Function GFX_Screen_Copy

src/gfx.c:404–445

* Copy information from one screenbuffer to the other. * @param xSrc The X-coordinate on the source. * @param ySrc The Y-coordinate on the source. * @param xDst The X-coordinate on the destination. * @param yDst The Y-coordinate on the destination. * @param width The width. * @param height The height. * @param screenSrc The ID of the source screen. * @param screenDst The ID of the destinat

 * @param screenDst The ID of the destination screen.
 */
void GFX_Screen_Copy(int16 xSrc, int16 ySrc, int16 xDst, int16 yDst, int16 width, int16 height, Screen screenSrc, Screen screenDst)
{
	uint8 *src;
	uint8 *dst;

	if (xSrc >= SCREEN_WIDTH) return;
	if (xSrc < 0) xSrc = 0;

	if (ySrc >= SCREEN_HEIGHT) return;
	if (ySrc < 0) ySrc = 0;

	if (xDst >= SCREEN_WIDTH) return;
	if (xDst < 0) xDst = 0;

	if ((yDst + height) > SCREEN_HEIGHT) {
		height = SCREEN_HEIGHT - 1 - yDst;
	}
	if (height <= 0) return;

	if (yDst >= SCREEN_HEIGHT) return;
	if (yDst < 0) yDst = 0;

	if (width <= 0 || width > SCREEN_WIDTH) return;

	src = GFX_Screen_Get_ByIndex(screenSrc);
	dst = GFX_Screen_Get_ByIndex(screenDst);

	src += xSrc + ySrc * SCREEN_WIDTH;
	dst += xDst + yDst * SCREEN_WIDTH;

	GFX_Screen_SetDirty(screenDst, xDst, yDst, xDst + width, yDst + height);

	if (width == SCREEN_WIDTH) {
		memmove(dst, src, height * SCREEN_WIDTH);
	} else {
		while (height-- != 0) {
			memmove(dst, src, width);
			dst += SCREEN_WIDTH;
			src += SCREEN_WIDTH;
		}
	}
}

/**
 * Clears the screen.