From 5b048de879a8bcf8eaad422d6f8cf741630d9256 Mon Sep 17 00:00:00 2001
From: Travis Howell
Date: Mon, 9 Oct 2006 01:58:48 +0000
Subject: Add conversion for planar graphics in Amiga version of Elvira 1/2 and
 Waxworks

svn-id: r24243
---
 engines/agos/res_ami.cpp | 305 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 305 insertions(+)
 create mode 100644 engines/agos/res_ami.cpp

(limited to 'engines/agos')

diff --git a/engines/agos/res_ami.cpp b/engines/agos/res_ami.cpp
new file mode 100644
index 0000000000..3d2f4fc755
--- /dev/null
+++ b/engines/agos/res_ami.cpp
@@ -0,0 +1,305 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2001  Ludvig Strigeus
+ * Copyright (C) 2001-2006 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+// Resource file routines for Simon1/Simon2
+#include "common/stdafx.h"
+
+#include "agos/agos.h"
+#include "agos/intern.h"
+
+namespace AGOS {
+
+byte *buffer;
+byte *bufptr;
+byte *bufferout;
+byte *bufptrout;
+uint32 bufoutend;
+byte *clipptr;
+byte *clipoutptr;
+int clipnumber;
+
+static void uncompressplane(byte *plane, byte *outptr, uint16 length) {
+	char x;
+	byte y, z;
+	while (length) {
+		x = *plane++;
+		if (x >= 0) {
+			x += 1;
+			y = *plane++;
+			z = *plane++;
+			while (x) {
+				*outptr++ = y;
+				*outptr++ = z;
+				length--;
+				if (length == 0)
+					break;
+				x--;
+			}
+		} else {
+			while (x) {
+				*outptr++ = *plane++;
+				*outptr++ = *plane++;
+				length--;
+				if (length == 0)
+					break;
+				x++;
+			}
+		}
+	}
+}
+
+static void convertcompressedclip(uint16 height, uint16 width) {
+	byte *plane0;
+	byte *plane1;
+	byte *plane2;
+	byte *plane3;
+	byte *uncbuffer;
+	byte *uncptr0;
+	byte *uncptr1;
+	byte *uncptr2;
+	byte *uncptr3;
+	byte *uncbfrout;
+	byte *uncbfroutptr;
+	uint16 length, i, j, k, word1, word2, word3, word4, cliplength;
+	byte outbyte, outbyte1, x, y;
+	char n;
+	uncbuffer = (byte *)malloc((long)(height * width / 2));
+	uncbfrout = (byte *)malloc((long)(height * width / 2));
+	length = width / 16;
+	length *= height;
+	plane0 = READ_BE_UINT32(clipptr) + clipptr; clipptr += 4; plane0 += 4;
+	plane1 = READ_BE_UINT32(clipptr) + clipptr; clipptr += 4; plane1 += 4;
+	plane2 = READ_BE_UINT32(clipptr) + clipptr; clipptr += 4; plane2 += 4;
+	plane3 = READ_BE_UINT32(clipptr) + clipptr; clipptr += 4; plane3 += 4;
+	plane0 -= 4;
+	plane1 -= 8;
+	plane2 -= 12;
+	plane3 -= 16;
+	uncptr0 = uncbuffer;
+	uncptr1 = uncptr0+(length*2);
+	uncptr2 = uncptr1+(length*2);
+	uncptr3 = uncptr2+(length*2);
+	uncompressplane(plane0, uncptr0, length);
+	uncompressplane(plane1, uncptr1, length);
+	uncompressplane(plane2, uncptr2, length);
+	uncompressplane(plane3, uncptr3, length);
+	uncbfroutptr = uncbfrout;
+	for (i = 0; i < length; i++) {
+		word1=READ_BE_UINT16(uncptr0); uncptr0 += 2;
+		word2=READ_BE_UINT16(uncptr1); uncptr1 += 2;
+		word3=READ_BE_UINT16(uncptr2); uncptr2 += 2;
+		word4=READ_BE_UINT16(uncptr3); uncptr3 += 2;
+		for (j = 0; j < 8; j++) {
+			outbyte = ((word1 / 32768) + ((word2 / 32768) * 2) + ((word3 / 32768) * 4) + ((word4 / 32768) * 8));
+			word1 <<= 1;
+			word2 <<= 1;
+			word3 <<= 1;
+			word4 <<= 1;
+			outbyte1 = ((word1 / 32768) + ((word2 / 32768) * 2) + ((word3 / 32768) * 4) + ((word4 / 32768) * 8));
+			word1 <<= 1;
+			word2 <<= 1;
+			word3 <<= 1;
+			word4 <<= 1;
+			*uncbfroutptr++ = (outbyte * 16 + outbyte1);
+		}
+	}
+	uncptr0 = uncbuffer;
+	uncptr1 = uncbfrout;
+	uncptr2 = uncbfrout;
+	uncptr3 = uncbfrout;
+	for (i = 0; i < (width / 16); i++) {
+		for (k = 0; k < 8; k++) {
+			for (j = 0; j < height; j++) {
+				*uncptr0++ = *uncptr1;
+				uncptr1 += 8;
+			}
+			uncptr2++;
+			uncptr1 = uncptr2;
+		}
+		uncptr3 += (height * 8);
+		uncptr2 = uncptr3;
+		uncptr1 = uncptr2;
+	}
+	length *= 8;
+	cliplength = 0;
+	while(1) {
+		if (length == 1) {
+			*clipoutptr++ = 0xFF; bufoutend++;
+			*clipoutptr++ = *uncbuffer; bufoutend++;
+			cliplength += 2;
+			break;
+		}
+		x = *uncbuffer++;
+		y = *uncbuffer++;
+		length -= 2;
+		if (x == y) {
+			n = 1;
+			y = *uncbuffer++;
+			if (length == 0) {
+				*clipoutptr++ = n; bufoutend++;
+				*clipoutptr++ = x; bufoutend++;
+				cliplength += 2;
+				break;
+			}
+			length--;
+			while (x == y) 	{
+				n++;
+				y = *uncbuffer++;
+				if (length == 0)
+					break;
+				length--;
+				if(n == 127)
+					break;
+			}
+			*clipoutptr++ = n; bufoutend++;
+			*clipoutptr++ = x; bufoutend++;
+			cliplength += 2;
+			uncbuffer--;
+			if (length == 0)
+				break;
+			length++;
+		} else {
+			n =- 1;
+			uncptr0 = clipoutptr;
+			clipoutptr++;
+			bufoutend++;
+			*clipoutptr++ = x; bufoutend++;
+			cliplength += 2;
+			x = y;
+			y = *uncbuffer++;
+			if (length == 0) {
+				*uncptr0 = n;
+				break;
+			}
+			length--;
+			while (x != y) {
+				if (n == -127)
+					break;
+				n--;
+				*clipoutptr++ = x; bufoutend++;
+				cliplength++;
+				x = y;
+				y = *uncbuffer++;
+				if (length == 0)
+					break;
+				length--;
+			}
+			*uncptr0 = n;
+			if (length == 0)
+				break;
+			uncbuffer -= 2;
+			length += 2;
+		}
+	}
+	if (cliplength > (height * width / 2))
+		warning("Negative compression. Clip %d. %d bytes bigger.",clipnumber,(cliplength-(height*width/2)));
+	free(uncbuffer);
+	free(uncbfrout);
+}
+
+static void convertclip(uint32 offset, uint16 height, uint16 width) {
+	uint32 length, i, j;
+	uint16 word1, word2, word3, word4;
+	byte outbyte, outbyte1;
+	clipptr = offset + buffer;
+	clipoutptr = bufoutend + bufferout;
+	WRITE_BE_UINT32(bufptrout, bufoutend); bufptrout += 4;
+	WRITE_BE_UINT16(bufptrout, height); bufptrout += 2;
+	WRITE_BE_UINT16(bufptrout, width); bufptrout += 2;
+	if (height > 32000) {
+		convertcompressedclip((uint16)(height - 32768), width);
+	} else {
+		width /= 16;
+		length = height * width;
+		for (i = 0; i < length; i++) {
+			word1 = READ_BE_UINT16(clipptr); clipptr += 2;
+			word2 = READ_BE_UINT16(clipptr); clipptr += 2;
+			word3 = READ_BE_UINT16(clipptr); clipptr += 2;
+			word4 = READ_BE_UINT16(clipptr); clipptr += 2;
+			for (j = 0; j < 8; j++) {
+				outbyte = ((word1 / 32768) + ((word2 / 32768) * 2) + ((word3 / 32768) * 4) + ((word4 / 32768) * 8));
+				word1 <<= 1;
+				word2 <<= 1;
+				word3 <<= 1;
+				word4 <<= 1;
+				outbyte1 = ((word1 / 32768) + ((word2 / 32768) * 2) + ((word3 / 32768) * 4) + ((word4 / 32768) * 8));
+				word1 <<= 1;
+				word2 <<= 1;
+				word3 <<= 1;
+				word4 <<= 1;
+				*clipoutptr++ = outbyte * 16 + outbyte1; bufoutend++;
+			}
+		}
+	}
+}
+
+void AGOSEngine::convertAmiga(byte *srcBuf, int32 fileSize) {
+	uint32 clipoffset, outlength;
+	uint16 clipwidth, clipheight;
+	byte *clipsend;
+
+	debug(0, "convertAmiga: fizeSize %d", fileSize);
+
+	buffer = (byte *)malloc((long)fileSize);
+	memcpy(buffer, srcBuf, fileSize);
+	bufptr = buffer;
+
+	bufferout = (byte *)malloc((long)(fileSize * 2));
+	bufptr = buffer;
+	bufptrout = bufferout;
+	clipnumber = 0;
+	while(1) {
+		clipoffset = READ_BE_UINT32(bufptr); bufptr +=4;
+		clipheight = READ_BE_UINT16(bufptr); bufptr +=2;
+		clipwidth = READ_BE_UINT16(bufptr); bufptr +=2;
+		if (clipoffset != 0)
+			break;
+		WRITE_BE_UINT32(bufptrout, 0); bufptrout += 4;
+		WRITE_BE_UINT32(bufptrout, 0); bufptrout += 4;
+		clipnumber++;
+	}
+
+	clipsend = (byte *)(clipoffset + (uint32)buffer);
+	bufoutend = clipoffset;
+	while (bufptr <= clipsend) {
+		if (clipoffset != 0) {
+			convertclip(clipoffset, clipheight, clipwidth);
+		} else {
+			WRITE_BE_UINT32(bufptrout, 0); bufptrout += 4;
+			WRITE_BE_UINT32(bufptrout, 0); bufptrout += 4;
+		}
+		clipoffset = READ_BE_UINT32(bufptr); bufptr +=4;
+		clipheight = READ_BE_UINT16(bufptr); bufptr +=2;
+		clipwidth = READ_BE_UINT16(bufptr); bufptr +=2;
+		clipnumber++;
+	}
+	outlength = bufoutend;
+	debug(0, "convertAmiga: outlength %d",outlength);
+
+	byte *dstBuf = allocBlock (outlength);
+	memcpy(dstBuf, bufferout, outlength);
+	free(buffer);
+	free(bufferout);
+}
+
+} // End of namespace AGOS
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