1 files changed, 95 insertions, 0 deletions
diff --git a/jni/feature_stab/src/dbregtest/PgmImage.h b/jni/feature_stab/src/dbregtest/PgmImage.h
new file mode 100644
index 000000000..d4d1eebed
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+++ b/jni/feature_stab/src/dbregtest/PgmImage.h
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+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <vector>
+#include <iostream>
+#include <fstream>
+#include <sstream>
+#include <memory.h>
+
+/*!
+ * Simple class to manipulate PGM/PPM images. Not suitable for heavy lifting.
+ */
+class PgmImage
+{
+    friend std::ostream& operator<< (std::ostream& o, const PgmImage& im);
+public:
+    enum {PGM_BINARY_GRAYMAP,PGM_BINARY_PIXMAP,PGM_FORMAT_INVALID};
+    /*!
+    * Constructor from a PGM file name.
+    */
+    PgmImage(std::string filename);
+    /*!
+    * Constructor to allocate an image of given size and type.
+    */
+    PgmImage(int w, int h, int format = PGM_BINARY_GRAYMAP);
+    /*!
+    * Constructor to allocate an image of given size and copy the data in.
+    */
+    PgmImage(unsigned char *data, int w, int h);
+    /*!
+    * Constructor to allocate an image of given size and copy the data in.
+    */
+    PgmImage(std::vector<unsigned char> &data, int w, int h);
+
+    PgmImage(const PgmImage &im);
+
+    PgmImage& operator= (const PgmImage &im);
+    ~PgmImage();
+
+    int GetHeight() const { return m_h; }
+    int GetWidth() const { return m_w; }
+
+    //! Copy pixels from data pointer
+    void SetData(const unsigned char * data);
+
+    //! Get a data pointer to unaligned memory area
+    unsigned char * GetDataPointer() { if ( m_data.size() > 0 ) return &m_data[0]; else return NULL; }
+    unsigned char ** GetRowPointers() { if ( m_rows.size() == m_h ) return &m_rows[0]; else return NULL; }
+
+    //! Read a PGM file from disk
+    bool ReadPGM(const std::string filename);
+    //! Write a PGM file to disk
+    bool WritePGM(const std::string filename, const std::string comment="");
+
+    //! Get image format (returns PGM_BINARY_GRAYMAP, PGM_BINARY_PIXMAP or PGM_FORMAT_INVALID)
+    int GetFormat() const { return m_format; }
+
+    //! Set image format (returns PGM_BINARY_GRAYMAP, PGM_BINARY_PIXMAP). Image data becomes invalid.
+    void SetFormat(int format);
+
+    //! If the image is PGM_BINARY_PIXMAP, convert it to PGM_BINARY_GRAYMAP via Y = 0.3*R + 0.59*G + 0.11*B.
+    void ConvertToGray();
+protected:
+    // Generic functions:
+    void DeepCopy(const PgmImage& src, PgmImage& dst);
+    void SetupRowPointers();
+
+    // PGM data
+    int m_w;
+    int m_h;
+    int m_format;
+    int m_colors;
+    int m_over_allocation;
+    std::vector<unsigned char> m_data;
+    std::string m_comment;
+
+    std::vector<unsigned char *> m_rows;
+};
+
+std::ostream& operator<< (std::ostream& o, const PgmImage& im);