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+/**
+ * @file llkdumem.h
+ * @brief Helper class for kdu memory management
+ *
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLKDUMEM_H
+#define LL_LLKDUMEM_H
+
+// Support classes for reading and writing from memory buffers in KDU
+#include "kdu_image.h"
+#include "kdu_elementary.h"
+#include "kdu_messaging.h"
+#include "kdu_params.h"
+#include "kdu_compressed.h"
+#include "kdu_sample_processing.h"
+#include "image_local.h"
+#include "stdtypes.h"
+
+class LLKDUMemSource: public kdu_compressed_source
+{
+public: // Member functions
+ LLKDUMemSource(U8 *input_buffer, U32 size)
+ {
+ mData = input_buffer;
+ mSize = size;
+ mCurPos = 0;
+ }
+
+ ~LLKDUMemSource()
+ {
+ }
+
+ int read(kdu_byte *buf, int num_bytes)
+ {
+ U32 num_out;
+ num_out = num_bytes;
+
+ if ((mSize - mCurPos) < (U32)num_bytes)
+ {
+ num_out = mSize -mCurPos;
+ }
+ memcpy(buf, mData + mCurPos, num_out);
+ mCurPos += num_out;
+ return num_out;
+ }
+
+ void reset()
+ {
+ mCurPos = 0;
+ }
+
+private: // Data
+ U8 *mData;
+ U32 mSize;
+ U32 mCurPos;
+};
+
+class LLKDUMemTarget: public kdu_compressed_target
+{
+public: // Member functions
+ LLKDUMemTarget(U8 *output_buffer, U32 &output_size, const U32 buffer_size)
+ {
+ mData = output_buffer;
+ mSize = buffer_size;
+ mCurPos = 0;
+ mOutputSize = &output_size;
+ }
+
+ ~LLKDUMemTarget()
+ {
+ }
+
+ bool write(const kdu_byte *buf, int num_bytes)
+ {
+ U32 num_out;
+ num_out = num_bytes;
+
+ if ((mSize - mCurPos) < (U32)num_bytes)
+ {
+ num_out = mSize - mCurPos;
+ memcpy(mData + mCurPos, buf, num_out);
+ return false;
+ }
+ memcpy(mData + mCurPos, buf, num_out);
+ mCurPos += num_out;
+ *mOutputSize = mCurPos;
+ return true;
+ }
+
+private: // Data
+ U8 *mData;
+ U32 mSize;
+ U32 mCurPos;
+ U32 *mOutputSize;
+};
+
+class LLKDUMemIn : public kdu_image_in_base
+{
+public: // Member functions
+ LLKDUMemIn(const U8 *data,
+ const U32 size,
+ const U16 rows,
+ const U16 cols,
+ U8 in_num_components,
+ siz_params *siz);
+ ~LLKDUMemIn();
+
+ bool get(int comp_idx, kdu_line_buf &line, int x_tnum);
+
+private: // Data
+ const U8 *mData;
+ int first_comp_idx;
+ int num_components;
+ int rows, cols;
+ int alignment_bytes; // Number of 0's at end of each line.
+ int precision[3];
+ image_line_buf *incomplete_lines; // Each "sample" represents a full pixel
+ image_line_buf *free_lines;
+ int num_unread_rows;
+
+ U32 mCurPos;
+ U32 mDataSize;
+};
+#endif