Function WSA_DisplayFrame

src/wsa.c:407–488

* Display a frame. * @param wsa The pointer to the WSA. * @param frameNext The next frame to display. * @param posX The X-position of the WSA. * @param posY The Y-position of the WSA. * @param screenID The screenID to draw on. * @return False on failure, true on success. */

 * @return False on failure, true on success.
 */
bool WSA_DisplayFrame(void *wsa, uint16 frameNext, uint16 posX, uint16 posY, Screen screenID)
{
	WSAHeader *header = (WSAHeader *)wsa;
	uint8 *dst;

	uint16 i;
	uint16 frame;
	int16 frameDiff;
	int16 direction;
	int16 frameCount;

	if (wsa == NULL) return false;
	if (frameNext >= header->frames) return false;

	if (header->flags.displayInBuffer) {
		dst = (uint8 *)wsa + sizeof(WSAHeader);
	} else {
		dst = GFX_Screen_Get_ByIndex(screenID);
		dst += posX + posY * SCREEN_WIDTH;
	}

	if (header->frameCurrent == header->frames) {
		if (!header->flags.hasNoFirstFrame) {
			if (!header->flags.displayInBuffer) {
				Format40_Decode_ToScreen(dst, header->buffer, header->width);
			} else {
				Format40_Decode(dst, header->buffer);
			}
		}

		header->frameCurrent = 0;
	}

	frameDiff = abs(header->frameCurrent - frameNext);
	direction = 1;

	if (frameNext > header->frameCurrent) {
		frameCount = header->frames - frameNext + header->frameCurrent;

		if (frameCount < frameDiff && !header->flags.noAnimation) {
			direction = -1;
		} else {
			frameCount = frameDiff;
		}
	} else {
		frameCount = header->frames - header->frameCurrent + frameNext;

		if (frameCount < frameDiff && !header->flags.noAnimation) {
		} else {
			direction = -1;
			frameCount = frameDiff;
		}
	}

	frame = header->frameCurrent;
	if (direction > 0) {
		for (i = 0; i < frameCount; i++) {
			frame += direction;