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authorYaniv Kamay <ykamay@redhat.com>2009-09-19 21:25:46 +0300
committerYaniv Kamay <ykamay@redhat.com>2009-10-14 15:06:41 +0200
commitc1b79eb035fa158fb2ac3bc8e559809611070016 (patch)
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+/*
+ Copyright (C) 2009 Red Hat, Inc.
+
+ 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _H_GLZ_ENCODER
+#define _H_GLZ_ENCODER
+
+/* Manging the lz encoding using a dictionary that is shared among encoders */
+
+#include <stdint.h>
+#include "lz_common.h"
+#include "glz_encoder_dictionary.h"
+#include "glz_encoder_config.h"
+
+typedef void GlzEncoderContext;
+
+GlzEncoderContext *glz_encoder_create(uint8_t id, GlzEncDictContext *dictionary,
+ GlzEncoderUsrContext *usr);
+
+void glz_encoder_destroy(GlzEncoderContext *opaque_encoder);
+
+/*
+ assumes width is in pixels and stride is in bytes
+ usr_context : when an image is released from the window due to capicity overflow,
+ usr_context is given as a parmater to the free_image callback.
+ o_enc_dict_context: if glz_enc_dictionary_remove_image is called, it should be
+ called with the o_enc_dict_context that is associated with
+ the image.
+
+ return: the number of bytes in the compressed data and sets o_enc_dict_context
+
+ NOTE : currently supports only rgb images in which width*bytes_per_pixel = stride OR
+ palette images in which stride eqauls the min number of bytes to hold a line.
+ The stride should be > 0
+*/
+int glz_encode(GlzEncoderContext *opaque_encoder, LzImageType type, int width, int height,
+ int top_down, uint8_t *lines, unsigned int num_lines, int stride,
+ uint8_t *io_ptr, unsigned int num_io_bytes, GlzUsrImageContext *usr_context,
+ GlzEncDictImageContext **o_enc_dict_context);
+
+
+#endif // _H_GLZ_ENCODER
+