GraphiC 2026 Version History & Changelog

📅 2026-09-24

• Desktop Auto-Preview (svgopen / svg_open):
• Automatically launches the generated plot in the user's default desktop web browser or system SVG viewer using native operating system dispatch (open on macOS, start on Windows, xdg-open on Linux).
• Passing svgopen(NULL) or an empty string ("") automatically retrieves and opens the companion HTML viewer (e.g. myplot.html) for the active session, featuring interactive mouse-wheel zoom, drag-to-pan, view reset, and live vector streaming updates.
• Passing a filename (e.g. svgopen("myplot.svg")) opens the raw vector graphic directly in the viewer associated with .svg files by the host operating system.
• Full multi-language parity across C, Fortran (gpc_svgopen), Python (fig.svgopen()), and Java (GraphiC.svgopen()).
• Live Plot Initialization Auto-Preview (GPC_AUTOPREVIEW=1):
• Setting the environment variable GPC_AUTOPREVIEW=1 automatically invokes svgopen(NULL) immediately upon bgnplot(), launching the companion browser viewer as soon as plotting begins without interrupting stream execution.
• Network Telemetry Push (svgpush / svg_push):
• Transmits rendered SVG plots over the network to remote HTTP/HTTPS ingest endpoints or live telemetry dashboards using standard POST requests with Content-Type: image/svg+xml.
• Modernizes and supersedes the historical socket streaming (tkfpush), enabling cloud compute clusters and IoT devices (such as live water temperature monitors) to stream plots directly without shell scripts or manual file copying.
• Comprehensive SVG Parity Test Suite (svgtest / §9.24):
• Added new multi-language test program (Examples/Svgtest.c, fortran/examples/svgtest.f90, python/examples/svgtest.py, java/examples/Svgtest.java) verifying tight bounding-box cropping, telemetry push, and desktop auto-preview.
• Added Section 9.24 to the Visual Gallery in the reference manual.
• Dedicated Architecture Guide: Section 2.6 "How You See GraphiC Plots":
• Comprehensive guide and comparison table detailing dual-file output (myplot.svg vs myplot.html), viewer target matrix, and OS launch mechanisms.
• Fortran Package Manager (fpm) Integration:
• Native fpm.toml manifest in the project root allowing GraphiC to be consumed as a direct git or path dependency in modern Fortran workflows.
• Master Function Index Parity (191 Routines):
• Section 10 expanded to 191 library routines, all cross-referenced with 100% multi-language parity across C, Python, Java 22, and Fortran 2003.

• Zero-Blank-Page Manual Layout:
• Streamlined manual pagination to exactly 229 pages with strict zero-blank-page verification across all chapters.
• Fully interactive PDF Table of Contents with 100% verified hyperlink navigation to all chapters, sections, and appendices.
• Deployment Safety & Directory Permissions:
• Hardened automated deployment pipeline (scripts/auto_deploy.py) to preserve Unix directory permissions (755) on public asset folders like GraphiC-svg/.

📅 2026-09-10

• SVG Tight Bounding-Box Auto-Cropping (svgcrop / svg_crop):
• Implemented dynamic bounding-box tracking across all 2D and 3D graphics operations: vector lines, polylines, Hershey vector font strokes, TrueType Bézier glyphs, and filled polygon panels.
• ANSI C tmpfile() stream buffering in Source/gpc_driver_svg.c to defer
header and background generation until plot completion.
• Default 0.25 inch (1/4") margin surrounding all drawn graphical elements (axes, labels, ticks, curves, titles, bars, legends, and fills).
• Configurable margin control API across all supported languages:
• C / C++: void svgcrop(float margin_inches); and macro #define svg_crop svgcrop in graphic.h.
• Fortran 2003: gpc_svgcrop(margin) and gpc_svg_crop(margin) in graphic.f90 / graphic_iso.f90.
• Python 3: svgcrop(margin_inches=0.25) and alias svg_crop() in procedural.py, fig.svgcrop() in figure.py.
• Java 22 (FFM): Graphic.svgcrop(float marginInches) and fig.svgcrop(float marginInches) in Graphic.java and Figure.java.
• Full-canvas fallback: Passing a negative margin (e.g. svgcrop(-1.0f)) disables auto-cropping and restores the standard uncropped 8.5" × 11" landscape canvas (viewBox="0 0 8192 6266").
• Typography Architecture & Counter Documentation:
• Clarified typography comparison (§4.7 / §10): explicitly detailed architectural differences between open vector stroke fonts (simplex, duplex, triplex), multi-piece closed-loop outline fonts (swiss, news), and TrueType closed Bézier contours with fill-rule="evenodd".
• Added complete OpenXML reference specification for svgcrop in Section 7.3 (§7.3 Page and Axis Options) of docs/MANUAL.md and docs/GraphiC_Modern_Manual.docx.
• Added svgcrop to Section 10 Master Function Index (now 189 routines) with Full Parity status across C, Fortran, Python, and Java.

• Default SVG export behavior now automatically crops to the plot bounding box + 0.25" margin, eliminating excess letter-sized white space when embedding plots into LaTeX documents, Microsoft Word, web pages, or journal figures.
• Background in SVG output now matches the calculated viewBox coordinates and dimensions.
• Resolved method signature collision in Python Figure.vector vs Figure.line_vector to support both directional arrow vectors and raw sheet vectors.

• Recompiled and verified all example test suites across C (35 examples), Fortran (19 examples), Python (25 examples), and Java (19 examples).
• Regenerated all 70+ test SVGs across the repository with tight viewBox coordinates.
• Audited all 191 production SVGs repository-wide with Python's XML parser; 100% well-formed with matching viewports.

• 64-Bit Multi-Platform Engine:
• Full native 64-bit portability for macOS (Apple Silicon ARM64 & Intel x86_64), Linux (x86_64 & AArch64), and 64-bit Windows.
• Zero-dependency architecture: pure standard libc and libm. No OpenGL, X11, Qt, Cairo, or FreeType runtime requirements.
• Sub-millisecond cold-start latency (0.002s) and minimal library footprint (~655 KB static, ~407 KB dynamic).
• Modernized portable memory and OS abstraction layer (Source/memory_portable.c, Source/baux_portable.c) replacing legacy 16-bit DOS far pointers and segment registers.
• Zero-Dependency Vector SVG 1.1 Driver:
• High-throughput vector SVG 1.1 driver (Source/gpc_driver_svg.c) with 256-color palettes, 16 hatch/cross-hatch fill patterns, line attributes, and Hershey vector stroke text.
• Responsive standalone SVGs paired with lightweight zero-framework HTML5 pan/zoom inspection viewers (viewer.html).
• Modern TrueType (.ttf) Outline Engine:
• Built-in zero-dependency TrueType engine (Source/Truetype.c, Source/Ttfntld.c, Source/Ttfntplt.c).
• Quadratic Bézier B-spline curve tessellation with user-configurable error tolerance (SetTTMaxError).
• Native UTF-8 multi-byte string decoding: transparently parses 2-byte Greek characters (α, β, γ, δ, λ, μ, π, σ, ω), mathematical operators (≤, ≥, ≠, ≈, ≡, ∞, ∇, ∂, √), and symbols (°C, ±).
• OpenType/TrueType Format 4 cmap Unicode BMP resolution.
• evenodd fill rule integration ensuring hollow counters/holes in letters (O, B, 8, R, e, a, %, Δ, θ).
• Pairwise kerning evaluation via SFNT kern table (SetTTKerning).
• First-Class Polyglot Language Bindings:
• Modern Fortran 2003+: Complete ISO_C_BINDING module interface (fortran/src/graphic.f90, fortran/src/graphic_iso.f90) with 19 runnable examples.
• Python 3: Idiomatic package (python/graphic/) with procedural API matching classic GraphiC routines, object-oriented Figure context managers, NumPy array support, and inline Jupyter notebook rendering.
• Java 22: Object-oriented SDK (com.sciend.graphic) leveraging Project Panama Foreign Function & Memory (FFM) API with zero-JNI downcalls.
• Specialized Engineering Visualizations:
• Built-in routines for RF Smith charts (smdraw, smgrid), chemical ternary phase diagrams (trigrid, tricnt), 3D hidden-surface mesh removal (surmatr), 2D contouring with arbitrary labels (conmatr), polar grids (polgrid), and simultaneous multi-axis systems (simuplot).
• 23 classic Hershey vector stroke font plates (simplex, complex, triplex, gothic, greek, script, swiss).
• Complete Modern Documentation Suite:
• 190-page modernized reference manual (docs/GraphiC_Modern_Manual.docx and PDF) featuring professional typography, callout alerts, and code examples.
• Section 10 Master Function Index: 188+ library routines cross-referenced with exact calling signatures, C source files (Source/*.c), manual section hyperlinks, and multi-language parity status.
• Classical Hershey Font Plate Appendices: Full glyph tables for 14 classical typefaces.
• Developer Guides: README.md, QUICKSTART.md, RECIPES.md, and Drupal comparison documentation.
• Modern Build Infrastructure:
• Cross-platform CMake build configuration (CMakeLists.txt).
• POSIX / GNU Make system (Makefile) with targets for C static/shared libraries, Fortran modules, Java compilation, and automated test suite execution (make run_c_examples, make run_fortran_examples).
• Automated digital delivery packager (package_distribution.py) for Lemon Squeezy releases.