Bundle API header file for libtiff

README.md

@@ -50,17 +50,18 @@ make && make examples
 ```
 
 The TURTLE source code conforms to C99 and has little dependencies except on
-the C89 standard library. Note however that for loading or dumping **DEM**s,
-you might also need the following external libraries:
+the C89 standard library. Note however that for loading or dumping some
+**DEM**s, you might also need the following external libraries:
 
-* **libpng** for custom TURTLE dumps.
+* **libpng** for custom TURTLE dumps (version >= 1.4).
 * **libtiff** for loading GEOTIFF data, e.g.
   [ASTER-GDEM2](https://asterweb.jpl.nasa.gov/gdem.asp) or
   [GEBCO](http://www.gebco.net/).
 
 Those are rather standard though and might already be installed on your system.
 In addition, build options allow to disable either or both of PNG or TIFF
-formats, and their dependencies, if not needed.
+formats if not needed. By default `libturtle` is built with modular linkage to
+`libpng` and `libtiff`, i.e. on demand using dynamic loading.
 
 ## Documentation
 

src/deps/tiffio.h

@@ -0,0 +1,97 @@
+#ifndef TURTLE_API_TIFF_H
+#define TURTLE_API_TIFF_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdarg.h>
+
+#define FIELD_CUSTOM 65
+
+#define TIFFTAG_IMAGEWIDTH              256     /* image width in pixels */
+#define TIFFTAG_IMAGELENGTH             257     /* image height in pixels */
+#define TIFFTAG_BITSPERSAMPLE           258     /* bits per channel (sample) */
+#define TIFFTAG_COMPRESSION             259     /* data compression technique */
+#define     COMPRESSION_NONE            1       /* dump mode */
+#define TIFFTAG_PHOTOMETRIC             262     /* photometric interpretation */
+#define     PHOTOMETRIC_MINISBLACK      1       /* min value is black */
+#define TIFFTAG_ORIENTATION             274     /* +image orientation */
+#define     ORIENTATION_TOPLEFT         1       /* row 0 top, col 0 lhs */
+#define TIFFTAG_SAMPLESPERPIXEL         277     /* samples per pixel */
+#define TIFFTAG_ROWSPERSTRIP            278     /* rows per strip of data */
+#define TIFFTAG_PLANARCONFIG            284     /* storage organization */
+#define     PLANARCONFIG_CONTIG         1       /* single image plane */
+#define TIFFTAG_RESOLUTIONUNIT          296     /* units of resolutions */
+#define     RESUNIT_NONE                1       /* no meaningful units */
+
+typedef struct tiff TIFF;
+typedef void (*TIFFErrorHandler) (const char *, const char *, va_list);
+typedef void (*TIFFExtendProc) (TIFF *);
+
+#define TIFF_INT16_T signed short
+#define TIFF_INT32_T signed int
+#define TIFF_INT64_T signed long
+#define TIFF_INT8_T signed char
+#define TIFF_UINT16_T unsigned short
+#define TIFF_UINT32_T unsigned int
+#define TIFF_UINT64_T unsigned long
+#define TIFF_UINT8_T unsigned char
+#define TIFF_SSIZE_T signed long
+#define TIFF_PTRDIFF_T ptrdiff_t
+
+typedef TIFF_INT8_T   int8;
+typedef TIFF_UINT8_T  uint8;
+typedef TIFF_INT16_T  int16;
+typedef TIFF_UINT16_T uint16;
+typedef TIFF_INT32_T  int32;
+typedef TIFF_UINT32_T uint32;
+typedef TIFF_INT64_T  int64;
+typedef TIFF_UINT64_T uint64;
+
+typedef TIFF_SSIZE_T tmsize_t;
+typedef uint64 toff_t;          /* file offset */
+
+typedef uint32 ttag_t;          /* directory tag */
+typedef uint16 tdir_t;          /* directory index */
+typedef uint16 tsample_t;       /* sample number */
+typedef uint32 tstrile_t;       /* strip or tile number */
+typedef tstrile_t tstrip_t;     /* strip number */
+typedef tstrile_t ttile_t;      /* tile number */
+typedef tmsize_t tsize_t;       /* i/o size in bytes */
+typedef void * tdata_t;         /* image data ref */
+
+typedef enum {
+        TIFF_NOTYPE = 0,      /* placeholder */
+        TIFF_BYTE = 1,        /* 8-bit unsigned integer */
+        TIFF_ASCII = 2,       /* 8-bit bytes w/ last byte null */
+        TIFF_SHORT = 3,       /* 16-bit unsigned integer */
+        TIFF_LONG = 4,        /* 32-bit unsigned integer */
+        TIFF_RATIONAL = 5,    /* 64-bit unsigned fraction */
+        TIFF_SBYTE = 6,       /* !8-bit signed integer */
+        TIFF_UNDEFINED = 7,   /* !8-bit untyped data */
+        TIFF_SSHORT = 8,      /* !16-bit signed integer */
+        TIFF_SLONG = 9,       /* !32-bit signed integer */
+        TIFF_SRATIONAL = 10,  /* !64-bit signed fraction */
+        TIFF_FLOAT = 11,      /* !32-bit IEEE floating point */
+        TIFF_DOUBLE = 12,     /* !64-bit IEEE floating point */
+        TIFF_IFD = 13,        /* %32-bit unsigned integer (offset) */
+        TIFF_LONG8 = 16,      /* BigTIFF 64-bit unsigned integer */
+        TIFF_SLONG8 = 17,     /* BigTIFF 64-bit signed integer */
+        TIFF_IFD8 = 18        /* BigTIFF 64-bit unsigned integer (offset) */
+} TIFFDataType;
+
+typedef struct {
+        ttag_t  field_tag;              /* field's tag */
+        short   field_readcount;        /* read count/TIFF_VARIABLE/TIFF_SPP */
+        short   field_writecount;       /* write count/TIFF_VARIABLE */
+        TIFFDataType field_type;        /* type of associated data */
+        unsigned short field_bit;       /* bit in fieldsset bit vector */
+        unsigned char field_oktochange; /* if true, can change while writing */
+        unsigned char field_passcount;  /* if true, pass dir count on set */
+        char    *field_name;            /* ASCII name */
+} TIFFFieldInfo;
+
+#ifdef __cplusplus
+}
+#endif
+#endif

src/turtle/io/geotiff16.c

@@ -34,7 +34,11 @@
 #include <dlfcn.h>
 #endif
 /* TIFF library */
+#ifndef TURTLE_NO_LD
+#include "deps/tiffio.h"
+#else
 #include <tiffio.h>
+#endif
 /* TURTLE library */
 #include "turtle/io.h"