add functions to load&scale pictures and to get exif information

[vuplus_dvbapp] / lib / gdi / picexif.h

diff --git a/lib/gdi/picexif.h b/lib/gdi/picexif.h
new file mode 100644 (file)
index 0000000..cd321d7
--- /dev/null
+++ b/lib/gdi/picexif.h
@@ -0,0 +1,81 @@
+#ifndef __exif_h__
+#define __exif_h__
+
+#include <stdlib.h>
+#include <memory.h>
+#include <string.h>
+#include <stdio.h>
+
+#define MAX_COMMENT 1000
+#define MAX_SECTIONS 20
+
+
+typedef struct tag_ExifInfo {
+       char  Version        [5];
+       char  CameraMake     [32];
+       char  CameraModel    [40];
+       char  DateTime       [20];
+       char  Orientation    [20];
+       char  MeteringMode   [30];
+       char  Comments[MAX_COMMENT];
+       char  FlashUsed      [20];
+       char  IsColor        [5];
+       char  ResolutionUnit [20];
+       char  ExposureProgram[30];
+       char  LightSource    [20];
+       float Xresolution;
+       float Yresolution;
+       float Brightness;
+       float ExposureTime;
+       float ExposureBias;
+       float Distance;
+       float CCDWidth;                 //in milimeters
+       float FocalplaneXRes;
+       float FocalplaneYRes;
+       float FocalplaneUnits;
+       float FocalLength;
+       float ApertureFNumber;
+       int   Height, Width;
+       int   CompressionLevel;
+       int   ISOequivalent;
+       int   Process;
+       int   Orient;
+       unsigned char * ThumbnailPointer;
+       unsigned ThumbnailSize;
+       bool  IsExif;
+} EXIFINFO;
+
+static const int BytesPerFormat[] = {0,1,1,2,4,8,1,1,2,4,8,4,8};
+
+class Cexif
+{
+       typedef struct tag_Section_t{
+       unsigned char* Data;
+       int Type;
+       unsigned Size;
+       } Section_t;
+public:
+       EXIFINFO* m_exifinfo;
+       char m_szLastError[256];
+       Cexif();
+       ~Cexif();
+       bool DecodeExif(const char *filename);
+       void ClearExif();
+protected:
+       bool process_EXIF(unsigned char * CharBuf, unsigned int length);
+       void process_COM (const unsigned char * Data, int length);
+       void process_SOFn (const unsigned char * Data, int marker);
+       int Get16u(void * Short);
+       int Get16m(void * Short);
+       long Get32s(void * Long);
+       unsigned long Get32u(void * Long);
+       double ConvertAnyFormat(void * ValuePtr, int Format);
+       bool ProcessExifDir(unsigned char * DirStart, unsigned char * OffsetBase, unsigned ExifLength, EXIFINFO * const pInfo, unsigned         char ** const LastExifRefdP);
+       int ExifImageWidth;
+       int MotorolaOrder;
+       Section_t Sections[MAX_SECTIONS];
+       int SectionsRead;
+       bool freeinfo;
+};
+
+#endif// __exif_h__