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engines/ags/shared/util/compress.h

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+/* 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef AGS_SHARED_UTIL_COMPRESS_H
+#define AGS_SHARED_UTIL_COMPRESS_H
+
+#include "ags/shared/core/types.h"
+#include "ags/shared/util/wgt2_allg.h"
+
+namespace AGS3 {
+
+namespace AGS {
+namespace Shared {
+class Stream;
+class Bitmap;
+} // namespace Shared
+} // namespace AGS
+
+using namespace AGS; // FIXME later
+
+bool rle_compress(const uint8_t *data, size_t data_sz, int image_bpp, Shared::Stream *out);
+bool rle_decompress(uint8_t *data, size_t data_sz, int image_bpp, Shared::Stream *in);
+// Packs a 8-bit bitmap using RLE compression, and writes into stream along with the palette
+void save_rle_bitmap8(Shared::Stream *out, const Shared::Bitmap *bmp, const RGB(*pal)[256] = nullptr);
+// Reads a 8-bit bitmap with palette from the stream and unpacks from RLE
+Shared::Bitmap *load_rle_bitmap8(Shared::Stream *in, RGB(*pal)[256] = nullptr);
+// Skips the 8-bit RLE bitmap
+void skip_rle_bitmap8(Shared::Stream *in);
+
+// LZW compression
+bool lzw_compress(const uint8_t *data, size_t data_sz, int image_bpp, Shared::Stream *out);
+bool lzw_decompress(uint8_t *data, size_t data_sz, int image_bpp, Shared::Stream *in, size_t in_sz);
+// Saves bitmap with an optional palette compressed by LZW
+void save_lzw(Shared::Stream *out, const Shared::Bitmap *bmpp, const RGB(*pal)[256] = nullptr);
+// Loads bitmap decompressing
+Shared::Bitmap *load_lzw(Shared::Stream *in, int dst_bpp, RGB (*pal)[256] = nullptr);
+
+// Deflate compression
+bool deflate_compress(const uint8_t *data, size_t data_sz, int image_bpp, Shared::Stream *out);
+bool inflate_decompress(uint8_t *data, size_t data_sz, int image_bpp, Shared::Stream *in, size_t in_sz);
+
+} // namespace AGS3
+
+#endif