Renamed graphics/animation.[cpp|h] to graphics/mpeg_player.[cpp|h] to be more

consistent with dxa_player.[cpp|h]. (Though actually, "decoder" might be more
accurate...)

svn-id: r23774

1 files changed, 632 insertions, 0 deletions

diff --git a/graphics/mpeg_player.cpp b/graphics/mpeg_player.cpp
new file mode 100644
index 0000000000..4ecf5cb6a6
--- /dev/null
+++ b/graphics/mpeg_player.cpp
@@ -0,0 +1,632 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2002-2006 The ScummVM project
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#include "common/stdafx.h"
+#include "graphics/mpeg_player.h"
+#include "common/file.h"
+#include "common/system.h"
+#include "common/util.h"
+#include "graphics/scaler/intern.h"
+
+namespace Graphics {
+
+BaseAnimationState::BaseAnimationState(OSystem *sys, int width, int height)
+	: _movieWidth(width), _movieHeight(height), _frameWidth(width), _frameHeight(height), _sys(sys) {
+#ifndef BACKEND_8BIT
+	const int screenW = _sys->getOverlayWidth();
+	const int screenH = _sys->getOverlayHeight();
+
+	_movieScale = MIN(screenW / _movieWidth, screenH / _movieHeight);
+
+	assert(_movieScale >= 1);
+	if (_movieScale > 3)
+		_movieScale = 3;
+
+	_colorTab = NULL;
+	_rgbToPix = NULL;
+	_bitFormat = 0;
+#endif
+}
+
+BaseAnimationState::~BaseAnimationState() {
+#ifdef USE_MPEG2
+	if (_mpegDecoder)
+		mpeg2_close(_mpegDecoder);
+	delete _mpegFile;
+#ifndef BACKEND_8BIT
+	_sys->hideOverlay();
+	free(_overlay);
+	free(_colorTab);
+	free(_rgbToPix);
+#endif
+#endif
+}
+
+
+bool BaseAnimationState::init(const char *name) {
+#ifdef USE_MPEG2
+	char tempFile[512];
+
+	_mpegDecoder = NULL;
+	_mpegFile = NULL;
+
+#ifdef BACKEND_8BIT
+
+	uint i, p;
+
+	// Load lookup palettes
+	sprintf(tempFile, "%s.pal", name);
+
+	Common::File f;
+
+	if (!f.open(tempFile)) {
+		warning("Cutscene: %s palette missing", tempFile);
+		return false;
+	}
+
+	p = 0;
+	while (1) {
+		_palettes[p].end = f.readUint16LE();
+		_palettes[p].cnt = f.readUint16LE();
+
+		if (f.ioFailed())
+			break;
+
+		for (i = 0; i < _palettes[p].cnt; i++) {
+			_palettes[p].pal[4 * i] = f.readByte();
+			_palettes[p].pal[4 * i + 1] = f.readByte();
+			_palettes[p].pal[4 * i + 2] = f.readByte();
+			_palettes[p].pal[4 * i + 3] = 0;
+		}
+		for (; i < 256; i++) {
+			_palettes[p].pal[4 * i] = 0;
+			_palettes[p].pal[4 * i + 1] = 0;
+			_palettes[p].pal[4 * i + 2] = 0;
+			_palettes[p].pal[4 * i + 3] = 0;
+		}
+
+		p++;
+	}
+
+	f.close();
+
+	_palNum = 0;
+	_maxPalNum = p;
+	setPalette(_palettes[_palNum].pal);
+	_lut = _lut2 = _yuvLookup[0];
+	_curPal = -1;
+	_cr = 0;
+	buildLookup(_palNum, 256);
+	_lut2 = _yuvLookup[1];
+	_lutCalcNum = (BITDEPTH + _palettes[_palNum].end + 2) / (_palettes[_palNum].end + 2);
+#else
+	buildLookup();
+	_overlay = (OverlayColor *)calloc(_movieScale * _movieWidth * _movieScale * _movieHeight, sizeof(OverlayColor));
+	_sys->showOverlay();
+#endif
+
+	// Open MPEG2 stream
+	_mpegFile = new Common::File();
+	sprintf(tempFile, "%s.mp2", name);
+	if (!_mpegFile->open(tempFile)) {
+		warning("Cutscene: Could not open %s", tempFile);
+		return false;
+	}
+
+	// Load and configure decoder
+	_mpegDecoder = mpeg2_init();
+	if (_mpegDecoder == NULL) {
+		warning("Cutscene: Could not allocate an MPEG2 decoder");
+		return false;
+	}
+
+	_mpegInfo = mpeg2_info(_mpegDecoder);
+	_frameNum = 0;
+
+	return true;
+#else /* USE_MPEG2 */
+	return false;
+#endif
+}
+
+bool BaseAnimationState::decodeFrame() {
+#ifdef USE_MPEG2
+	mpeg2_state_t state;
+	const mpeg2_sequence_t *sequence_i;
+	size_t size = (size_t) -1;
+	static byte buf[BUFFER_SIZE];
+
+	do {
+		state = mpeg2_parse(_mpegDecoder);
+		sequence_i = _mpegInfo->sequence;
+
+		switch (state) {
+		case STATE_BUFFER:
+			size = _mpegFile->read(buf, BUFFER_SIZE);
+			mpeg2_buffer(_mpegDecoder, buf, buf + size);
+			break;
+
+		case STATE_SLICE:
+		case STATE_END:
+			if (_mpegInfo->display_fbuf) {
+				checkPaletteSwitch();
+				drawYUV(sequence_i->width, sequence_i->height, _mpegInfo->display_fbuf->buf);
+#ifdef BACKEND_8BIT
+				buildLookup(_palNum + 1, _lutCalcNum);
+#endif
+
+				_frameNum++;
+				return true;
+			}
+			break;
+
+		default:
+			break;
+		}
+	} while (size);
+#endif
+	return false;
+}
+
+bool BaseAnimationState::checkPaletteSwitch() {
+#ifdef BACKEND_8BIT
+	// if we have reached the last image with this palette, switch to new one
+	if (_frameNum == _palettes[_palNum].end) {
+		unsigned char *l = _lut2;
+		_palNum++;
+		setPalette(_palettes[_palNum].pal);
+		_lutCalcNum = (BITDEPTH + _palettes[_palNum].end - (_frameNum + 1) + 2) / (_palettes[_palNum].end - (_frameNum + 1) + 2);
+		_lut2 = _lut;
+		_lut = l;
+		return true;
+	}
+#endif
+
+	return false;
+}
+
+void BaseAnimationState::handleScreenChanged() {
+#ifndef BACKEND_8BIT
+	const int screenW = _sys->getOverlayWidth();
+	const int screenH = _sys->getOverlayHeight();
+
+	int newScale = MIN(screenW / _movieWidth, screenH / _movieHeight);
+
+	assert(newScale >= 1);
+	if (newScale > 3)
+		newScale = 3;
+
+	if (newScale != _movieScale) {
+		// HACK: Since frames generally do not cover the entire screen,
+		//       We need to undraw the old frame. This is a very hacky
+		//       way of doing that.
+		OverlayColor *buf = (OverlayColor *)calloc(screenW * screenH, sizeof(OverlayColor));
+		_sys->copyRectToOverlay(buf, screenW, 0, 0, screenW, screenH);
+		free(buf);
+
+		free(_overlay);
+		_movieScale = newScale;
+		_overlay = (OverlayColor *)calloc(_movieScale * _movieWidth * _movieScale * _movieHeight, sizeof(OverlayColor));
+	}
+
+	buildLookup();
+#endif
+}
+
+#ifdef BACKEND_8BIT
+
+/**
+ * Build 'Best-Match' RGB lookup table
+ */
+void BaseAnimationState::buildLookup(int p, int lines) {
+	int y, cb;
+	int r, g, b, ii;
+
+	if (p >= _maxPalNum)
+		return;
+
+	if (p != _curPal) {
+		_curPal = p;
+		_cr = 0;
+		_pos = 0;
+	}
+
+	if (_cr > BITDEPTH)
+		return;
+
+	for (ii = 0; ii < lines; ii++) {
+		r = (-16 * 256 + (int) (256 * 1.596) * ((_cr << SHIFT) - 128)) / 256;
+		for (cb = 0; cb <= BITDEPTH; cb++) {
+			g = (-16 * 256 - (int) (0.813 * 256) * ((_cr << SHIFT) - 128) - (int) (0.391 * 256) * ((cb << SHIFT) - 128)) / 256;
+			b = (-16 * 256 + (int) (2.018 * 256) * ((cb << SHIFT) - 128)) / 256;
+
+			for (y = 0; y <= BITDEPTH; y++) {
+				int idx, bst = 0;
+				int dis = 2 * SQR(r - _palettes[p].pal[0]) + 4 * SQR(g - _palettes[p].pal[1]) + SQR(b - _palettes[p].pal[2]);
+
+				for (idx = 1; idx < 256; idx++) {
+					long d2 = 2 * SQR(r - _palettes[p].pal[4 * idx]) + 4 * SQR(g - _palettes[p].pal[4 * idx + 1]) + SQR(b - _palettes[p].pal[4 * idx + 2]);
+					if (d2 < dis) {
+						bst = idx;
+						dis = d2;
+					}
+				}
+				_lut2[_pos++] = bst;
+
+				r += (1 << SHIFT);
+				g += (1 << SHIFT);
+				b += (1 << SHIFT);
+			}
+			r -= (BITDEPTH + 1) * (1 << SHIFT);
+		}
+		_cr++;
+		if (_cr > BITDEPTH)
+			return;
+	}
+}
+
+#else
+
+// The YUV to RGB conversion code is derived from SDL's YUV overlay code, which
+// in turn appears to be derived from mpeg_play. The following copyright
+// notices have been included in accordance with the original license. Please
+// note that the term "software" in this context only applies to the two
+// functions buildLookup() and plotYUV() below.
+
+// Copyright (c) 1995 The Regents of the University of California.
+// All rights reserved.
+//
+// Permission to use, copy, modify, and distribute this software and its
+// documentation for any purpose, without fee, and without written agreement is
+// hereby granted, provided that the above copyright notice and the following
+// two paragraphs appear in all copies of this software.
+//
+// IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
+// DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
+// OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
+// CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
+// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
+// ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
+// PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+
+// Copyright (c) 1995 Erik Corry
+// All rights reserved.
+//
+// Permission to use, copy, modify, and distribute this software and its
+// documentation for any purpose, without fee, and without written agreement is
+// hereby granted, provided that the above copyright notice and the following
+// two paragraphs appear in all copies of this software.
+//
+// IN NO EVENT SHALL ERIK CORRY BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
+// SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF
+// THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF ERIK CORRY HAS BEEN ADVISED
+// OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// ERIK CORRY SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+// PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
+// BASIS, AND ERIK CORRY HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT,
+// UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+
+// Portions of this software Copyright (c) 1995 Brown University.
+// All rights reserved.
+//
+// Permission to use, copy, modify, and distribute this software and its
+// documentation for any purpose, without fee, and without written agreement
+// is hereby granted, provided that the above copyright notice and the
+// following two paragraphs appear in all copies of this software.
+//
+// IN NO EVENT SHALL BROWN UNIVERSITY BE LIABLE TO ANY PARTY FOR
+// DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
+// OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF BROWN
+// UNIVERSITY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// BROWN UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+// PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
+// BASIS, AND BROWN UNIVERSITY HAS NO OBLIGATION TO PROVIDE MAINTENANCE,
+// SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+
+void BaseAnimationState::buildLookup() {
+	// Do we already have lookup tables for this bit format?
+	if (gBitFormat == _bitFormat && _colorTab && _rgbToPix)
+		return;
+
+	free(_colorTab);
+	free(_rgbToPix);
+
+	_colorTab = (int16 *)malloc(4 * 256 * sizeof(int16));
+
+	int16 *Cr_r_tab = &_colorTab[0 * 256];
+	int16 *Cr_g_tab = &_colorTab[1 * 256];
+	int16 *Cb_g_tab = &_colorTab[2 * 256];
+	int16 *Cb_b_tab = &_colorTab[3 * 256];
+
+	_rgbToPix = (OverlayColor *)malloc(3 * 768 * sizeof(OverlayColor));
+
+	OverlayColor *r_2_pix_alloc = &_rgbToPix[0 * 768];
+	OverlayColor *g_2_pix_alloc = &_rgbToPix[1 * 768];
+	OverlayColor *b_2_pix_alloc = &_rgbToPix[2 * 768];
+
+	int16 CR, CB;
+	int i;
+
+	// Generate the tables for the display surface
+
+	for (i = 0; i < 256; i++) {
+		// Gamma correction (luminescence table) and chroma correction
+		// would be done here. See the Berkeley mpeg_play sources.
+
+		CR = CB = (i - 128);
+		Cr_r_tab[i] = (int16) ( (0.419 / 0.299) * CR);
+		Cr_g_tab[i] = (int16) (-(0.299 / 0.419) * CR);
+		Cb_g_tab[i] = (int16) (-(0.114 / 0.331) * CB);
+		Cb_b_tab[i] = (int16) ( (0.587 / 0.331) * CB);
+	}
+
+	// Set up entries 0-255 in rgb-to-pixel value tables.
+	for (i = 0; i < 256; i++) {
+		r_2_pix_alloc[i + 256] = _sys->RGBToColor(i, 0, 0);
+		g_2_pix_alloc[i + 256] = _sys->RGBToColor(0, i, 0);
+		b_2_pix_alloc[i + 256] = _sys->RGBToColor(0, 0, i);
+	}
+
+	// Spread out the values we have to the rest of the array so that we do
+	// not need to check for overflow.
+	for (i = 0; i < 256; i++) {
+		r_2_pix_alloc[i] = r_2_pix_alloc[256];
+		r_2_pix_alloc[i + 512] = r_2_pix_alloc[511];
+		g_2_pix_alloc[i] = g_2_pix_alloc[256];
+		g_2_pix_alloc[i + 512] = g_2_pix_alloc[511];
+		b_2_pix_alloc[i] = b_2_pix_alloc[256];
+		b_2_pix_alloc[i + 512] = b_2_pix_alloc[511];
+	}
+
+	_bitFormat = gBitFormat;
+}
+
+void BaseAnimationState::plotYUV(int width, int height, byte *const *dat) {
+	switch (_movieScale) {
+	case 1:
+		plotYUV1x(width, height, dat);
+		break;
+	case 2:
+		plotYUV2x(width, height, dat);
+		break;
+	case 3:
+		plotYUV3x(width, height, dat);
+		break;
+	}
+}
+
+void BaseAnimationState::plotYUV1x(int width, int height, byte *const *dat) {
+	OverlayColor *ptr = _overlay;
+
+	byte *lum = dat[0];
+	byte *cr = dat[2];
+	byte *cb = dat[1];
+
+	byte *lum2 = lum + width;
+
+	int16 cr_r;
+	int16 crb_g;
+	int16 cb_b;
+
+	OverlayColor *row1 = ptr;
+	OverlayColor *row2 = ptr + _movieWidth;
+
+	int x, y;
+
+	for (y = 0; y < height; y += 2) {
+		OverlayColor *r1 = row1;
+		OverlayColor *r2 = row2;
+
+		for (x = 0; x < width; x += 2) {
+			register byte L;
+
+			cr_r  = 0 * 768 + 256 + _colorTab[*cr + 0 * 256];
+			crb_g = 1 * 768 + 256 + _colorTab[*cr + 1 * 256] + _colorTab[*cb + 2 * 256];
+			cb_b  = 2 * 768 + 256 + _colorTab[*cb + 3 * 256];
+			++cr;
+			++cb;
+
+			L = *lum++;
+			*r1++ = _rgbToPix[L + cr_r] | _rgbToPix[L + crb_g] | _rgbToPix[L + cb_b];
+
+			L = *lum++;
+			*r1++ = _rgbToPix[L + cr_r] | _rgbToPix[L + crb_g] | _rgbToPix[L + cb_b];
+			
+			// Now, do second row.
+
+			L = *lum2++;
+			*r2++ = _rgbToPix[L + cr_r] | _rgbToPix[L + crb_g] | _rgbToPix[L + cb_b];
+
+			L = *lum2++;
+			*r2++ = _rgbToPix[L + cr_r] | _rgbToPix[L + crb_g] | _rgbToPix[L + cb_b];
+		}
+
+		lum  += width;
+		lum2 += width;
+		row1 += 2 * _movieWidth;
+		row2 += 2 * _movieWidth;
+	}
+}
+
+void BaseAnimationState::plotYUV2x(int width, int height, byte *const *dat) {
+	OverlayColor *ptr = _overlay;
+
+	byte *lum = dat[0];
+	byte *cr = dat[2];
+	byte *cb = dat[1];
+
+	byte *lum2 = lum + width;
+
+	int16 cr_r;
+	int16 crb_g;
+	int16 cb_b;
+
+	OverlayColor *row1 = ptr;
+	OverlayColor *row2 = ptr + 2 * 2 * _movieWidth;
+
+	int x, y;
+
+	for (y = 0; y < height; y += 2) {
+		OverlayColor *r1 = row1;
+		OverlayColor *r2 = row2;
+
+		for (x = 0; x < width; x += 2) {
+			register byte L;
+			register OverlayColor C;
+
+			cr_r  = 0 * 768 + 256 + _colorTab[*cr + 0 * 256];
+			crb_g = 1 * 768 + 256 + _colorTab[*cr + 1 * 256] + _colorTab[*cb + 2 * 256];
+			cb_b  = 2 * 768 + 256 + _colorTab[*cb + 3 * 256];
+			++cr;
+			++cb;
+
+			L = *lum++;
+			C = _rgbToPix[L + cr_r] | _rgbToPix[L + crb_g] | _rgbToPix[L + cb_b];
+			*r1++ = C;
+			*r1++ = C;
+
+			L = *lum++;
+			C = _rgbToPix[L + cr_r] | _rgbToPix[L + crb_g] | _rgbToPix[L + cb_b];
+			*r1++ = C;
+			*r1++ = C;
+			
+			// Now, do second row.
+
+			L = *lum2++;
+			C = _rgbToPix[L + cr_r] | _rgbToPix[L + crb_g] | _rgbToPix[L + cb_b];
+			*r2++ = C;
+			*r2++ = C;
+
+			L = *lum2++;
+			C = _rgbToPix[L + cr_r] | _rgbToPix[L + crb_g] | _rgbToPix[L + cb_b];
+			*r2++ = C;
+			*r2++ = C;
+		}
+
+		memcpy(row1 + 2 * _movieWidth, row1, 2 * _movieWidth * sizeof(OverlayColor));
+		memcpy(row2 + 2 * _movieWidth, row2, 2 * _movieWidth * sizeof(OverlayColor));
+
+		lum  += width;
+		lum2 += width;
+		row1 += 4 * 2 * _movieWidth;
+		row2 += 4 * 2 * _movieWidth;
+	}
+}
+
+void BaseAnimationState::plotYUV3x(int width, int height, byte *const *dat) {
+	OverlayColor *ptr = _overlay;
+
+	byte *lum = dat[0];
+	byte *cr = dat[2];
+	byte *cb = dat[1];
+
+	byte *lum2 = lum + width;
+
+	int16 cr_r;
+	int16 crb_g;
+	int16 cb_b;
+
+	OverlayColor *row1 = ptr;
+	OverlayColor *row2 = ptr + 3 * 3 * _movieWidth;
+
+	int x, y;
+
+	for (y = 0; y < height; y += 2) {
+		OverlayColor *r1 = row1;
+		OverlayColor *r2 = row2;
+
+		for (x = 0; x < width; x += 2) {
+			register byte L;
+			register OverlayColor C;
+
+			cr_r  = 0 * 768 + 256 + _colorTab[*cr + 0 * 256];
+			crb_g = 1 * 768 + 256 + _colorTab[*cr + 1 * 256] + _colorTab[*cb + 2 * 256];
+			cb_b  = 2 * 768 + 256 + _colorTab[*cb + 3 * 256];
+			++cr;
+			++cb;
+
+			L = *lum++;
+			C = _rgbToPix[L + cr_r] | _rgbToPix[L + crb_g] | _rgbToPix[L + cb_b];
+			*r1++ = C;
+			*r1++ = C;
+			*r1++ = C;
+
+			L = *lum++;
+			C = _rgbToPix[L + cr_r] | _rgbToPix[L + crb_g] | _rgbToPix[L + cb_b];
+			*r1++ = C;
+			*r1++ = C;
+			*r1++ = C;
+			
+			// Now, do second row.
+
+			L = *lum2++;
+			C = _rgbToPix[L + cr_r] | _rgbToPix[L + crb_g] | _rgbToPix[L + cb_b];
+			*r2++ = C;
+			*r2++ = C;
+			*r2++ = C;
+
+			L = *lum2++;
+			C = _rgbToPix[L + cr_r] | _rgbToPix[L + crb_g] | _rgbToPix[L + cb_b];
+			*r2++ = C;
+			*r2++ = C;
+			*r2++ = C;
+		}
+
+		memcpy(row1 + 3 * _movieWidth, row1, 3 * _movieWidth * sizeof(OverlayColor));
+		memcpy(row1 + 2 * 3 * _movieWidth, row1, 3 * _movieWidth * sizeof(OverlayColor));
+		memcpy(row2 + 3 * _movieWidth, row2, 3 * _movieWidth * sizeof(OverlayColor));
+		memcpy(row2 + 2 * 3 * _movieWidth, row2, 3 * _movieWidth * sizeof(OverlayColor));
+
+		lum  += width;
+		lum2 += width;
+		row1 += 6 * 3 * _movieWidth;
+		row2 += 6 * 3 * _movieWidth;
+	}
+}
+
+#endif
+
+void BaseAnimationState::updateScreen() {
+#ifndef BACKEND_8BIT
+	int width = _movieScale * _frameWidth;
+	int height = _movieScale * _frameHeight;
+	int pitch = _movieScale * _movieWidth;
+
+	const int screenW = _sys->getOverlayWidth();
+	const int screenH = _sys->getOverlayHeight();
+
+	int x = (screenW - _movieScale * _frameWidth) / 2;
+	int y = (screenH - _movieScale * _frameHeight) / 2;
+
+	_sys->copyRectToOverlay(_overlay, pitch, x, y, width, height);
+#endif
+	_sys->updateScreen();
+}
+
+} // End of namespace Graphics