Release Notes: This version is much faster. The actual increase in speed depends upon several factors like program structure, called routines, processor, and compiler used, but up to 60% seems to not be unrealistic. Some new important subroutines were implemented, including CREATE_STRUCT, CONTOUR, LAGUERRE, and STRCMP. SYSTIME now has sub-millisecond resolution. For the FFT procedure, the FFTW library can (alternatively) be used, resulting in about double the execution speed.
Release Notes: The new build option as a Python module allows embedding of TDL into Python (please see INSTALL and PYTHON.txt for details). Due to some changes in the internal data structures, the interpreter now works much faster (4-5 times). That is the interpreter itself; most programs spend the vast amount of time in library subroutines. Some bugs and memory leaks were fixed. The INTERPOLATE function and support for strided indices (array[start:end:stride]) were added. This release compiles with GCC 4.0.
Release Notes: This release adds a z-buffer device, the .RUN command, several new routines, and important bugfixes. The new routines (overall there are now more than 250) are SPAWN, WAIT, FINITE, ROUTINE_INFO, TEMPORARY, DIST, and TVSCL.
Release Notes: This version comes with lots of new subroutines (bringing the total to over 240), several improvements, and important bugfixes. The new routines were PLOTS, XYOUTS (both 2D only), OPLOT, REBIN, OBJ_CLASS, OBJ_ISA, N_TAGS, SWAP_ENDIAN, BYTSCL, BYTEORDER, SETENV, GETENV, STRUCT_ASSIGN, GETENV, STREGEX, and TAG_NAMES.
Release Notes: This version is a further step towards running the NASA IDL Astronomers library. It adds a very efficient CONVOL function. HISTOGRAM and SHIFT are now supporting all keywords. JOURNAL is now fully supported, so that entire GDL sessions can be logged and replayed.
Release Notes: With some bugfixes and a few library routines added, GDL now compiles and runs the READFITS function and the WRITEFITS procedure from the IDL astronomy user's library, which is an important step in the development of GDL.
Release Notes: With a newly implemented TV command, images and 2D data can now be visualized. Basic HDF5 file support was added along with many important functions and procedures, including HISTOGRAM, REFORM, SORT, UNIQ, FILE_TEST, and CD. GDL contains now more than 210 library routines.
Release Notes: Enhanced HDF support and better support for complex numbers with the new CONJ and IMAGINARY functions.
Release Notes: The program now builds on Mac OS X Panther with g++ 3.3. Support for several image file formats including TIFF and JPEG was added along with basic support for HDF.