IMAGE: Share the same pool of codecs between bitmap and AVI

4 files changed, 90 insertions, 9 deletions

diff --git a/image/bmp.cpp b/image/bmp.cpp
index eb8e300daf..cdf6e4097d 100644
--- a/image/bmp.cpp
+++ b/image/bmp.cpp
@@ -27,7 +27,7 @@
 #include "common/textconsole.h"
 #include "graphics/pixelformat.h"
 #include "graphics/surface.h"
-#include "image/codecs/bmp_raw.h"
+#include "image/codecs/codec.h"
 
 namespace Image {
 
@@ -93,13 +93,7 @@ bool BitmapDecoder::loadStream(Common::SeekableReadStream &stream) {
 		return false;
 	}
 
-	uint32 compression = stream.readUint32LE();
-
-	if (compression != 0) {
-		warning("Compressed bitmaps not supported");
-		return false;
-	}
-
+	uint32 compression = stream.readUint32BE();
 	uint32 imageSize = stream.readUint32LE();
 	/* uint32 pixelsPerMeterX = */ stream.readUint32LE();
 	/* uint32 pixelsPerMeterY = */ stream.readUint32LE();
@@ -120,11 +114,15 @@ bool BitmapDecoder::loadStream(Common::SeekableReadStream &stream) {
 		}
 	}
 
+	// Create the codec (it will warn about unhandled compression)
+	_codec = createBitmapCodec(compression, width, height, bitsPerPixel);
+	if (!_codec)
+		return false;
+
 	// Grab the frame data
 	Common::SeekableSubReadStream subStream(&stream, imageOffset, imageOffset + imageSize);
 
 	// We only support raw bitmaps for now
-	_codec = new BitmapRawDecoder(width, height, bitsPerPixel);
 	_surface = _codec->decodeFrame(subStream);
 
 	return true;
diff --git a/image/codecs/codec.cpp b/image/codecs/codec.cpp
new file mode 100644
index 0000000000..7d4e34320f
--- /dev/null
+++ b/image/codecs/codec.cpp
@@ -0,0 +1,77 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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.
+ *
+ */
+
+#include "common/scummsys.h"
+
+#include "image/codecs/codec.h"
+
+#include "image/codecs/bmp_raw.h"
+#include "image/codecs/cinepak.h"
+#include "image/codecs/indeo3.h"
+#include "image/codecs/mjpeg.h"
+#include "image/codecs/mpeg.h"
+#include "image/codecs/msvideo1.h"
+#include "image/codecs/msrle.h"
+#include "image/codecs/truemotion1.h"
+
+#include "common/endian.h"
+#include "common/textconsole.h"
+
+namespace Image {
+
+Codec *createBitmapCodec(uint32 tag, int width, int height, int bitsPerPixel) {
+	switch (tag) {
+	case SWAP_CONSTANT_32(0):
+		return new BitmapRawDecoder(width, height, bitsPerPixel);
+	case SWAP_CONSTANT_32(1):
+		return new MSRLEDecoder(width, height, bitsPerPixel);
+	case MKTAG('C','R','A','M'):
+	case MKTAG('m','s','v','c'):
+	case MKTAG('W','H','A','M'):
+		return new MSVideo1Decoder(width, height, bitsPerPixel);
+	case MKTAG('c','v','i','d'):
+		return new CinepakDecoder(bitsPerPixel);
+	case MKTAG('I','V','3','2'):
+		return new Indeo3Decoder(width, height);
+#ifdef VIDEO_CODECS_TRUEMOTION1_H
+	case MKTAG('D','U','C','K'):
+	case MKTAG('d','u','c','k'):
+		return new TrueMotion1Decoder(width, height);
+#endif
+#ifdef USE_MPEG2
+	case MKTAG('m','p','g','2'):
+		return new MPEGDecoder();
+#endif
+	case MKTAG('M','J','P','G'):
+	case MKTAG('m','j','p','g'):
+		return new MJPEGDecoder();
+	default:
+		if (tag & 0x00FFFFFF)
+			warning("Unknown BMP/AVI compression format \'%s\'", tag2str(tag));
+		else
+			warning("Unknown BMP/AVI compression format %d", SWAP_BYTES_32(tag));
+	}
+
+	return 0;
+}
+
+} // End of namespace Image
diff --git a/image/codecs/codec.h b/image/codecs/codec.h
index 092f9754f3..87d6d6b998 100644
--- a/image/codecs/codec.h
+++ b/image/codecs/codec.h
@@ -84,6 +84,11 @@ public:
 	virtual bool hasDirtyPalette() const { return false; }
 };
 
+/**
+ * Create a codec given a bitmap/AVI compression tag.
+ */
+Codec *createBitmapCodec(uint32 tag, int width, int height, int bitsPerPixel);
+
 } // End of namespace Image
 
 #endif
diff --git a/image/module.mk b/image/module.mk
index ab0a2a9a1f..fdf52ec09f 100644
--- a/image/module.mk
+++ b/image/module.mk
@@ -11,6 +11,7 @@ MODULE_OBJS := \
 	codecs/bmp_raw.o \
 	codecs/cdtoons.o \
 	codecs/cinepak.o \
+	codecs/codec.o \
 	codecs/indeo3.o \
 	codecs/mjpeg.o \
 	codecs/msrle.o \