Function GUI_Screen_FadeIn2

src/gui/gui.c:3820–3891

* Fade in parts of the screen from one screenbuffer to the other screenbuffer. * @param x The X-position in the source and destination screenbuffers. * @param y The Y-position in the source and destination screenbuffers. * @param width The width of the screen to copy. * @param height The height of the screen to copy. * @param screenSrc The ID of the source screen. * @param screenDst The ID o

 * @param skipNull Wether to copy pixels with colour 0.
 */
void GUI_Screen_FadeIn2(int16 x, int16 y, int16 width, int16 height, Screen screenSrc, Screen screenDst, uint16 delay, bool skipNull)
{
	Screen oldScreenID;
	uint16 i;
	uint16 j;

	uint16 columns[SCREEN_WIDTH];
	uint16 rows[SCREEN_HEIGHT];

	assert(width <= SCREEN_WIDTH);
	assert(height <= SCREEN_HEIGHT);

	if (screenDst == 0) {
		GUI_Mouse_Hide_InRegion(x, y, x + width, y + height);
	}

	for (i = 0; i < width; i++)  columns[i] = i;
	for (i = 0; i < height; i++) rows[i] = i;

	for (i = 0; i < width; i++) {
		uint16 tmp;

		j = Tools_RandomLCG_Range(0, width - 1);

		tmp = columns[j];
		columns[j] = columns[i];
		columns[i] = tmp;
	}

	for (i = 0; i < height; i++) {
		uint16 tmp;

		j = Tools_RandomLCG_Range(0, height - 1);

		tmp = rows[j];
		rows[j] = rows[i];
		rows[i] = tmp;
	}

	oldScreenID = GFX_Screen_SetActive(screenDst);

	for (j = 0; j < height; j++) {
		uint16 j2 = j;

		for (i = 0; i < width; i++) {
			uint8 colour;
			uint16 curX = x + columns[i];
			uint16 curY = y + rows[j2];

			if (++j2 >= height) j2 = 0;

			GFX_Screen_SetActive(screenSrc);

			colour = GFX_GetPixel(curX, curY);

			GFX_Screen_SetActive(screenDst);

			if (skipNull && colour == 0) continue;