Modules

Top-level public interface for fortplot - Modern Fortran plotting library

3D axes rendering module for projecting 3D axis frames to 2D

Text layout, positioning and typography functions for annotations

Type definitions and basic operations for text annotations

ASCII terminal plotting backend

ASCII terminal plotting backend - Basic Drawing Elements

ASCII terminal plotting backend - Legend Management

ASCII terminal plotting backend - Core Rendering Logic

ASCII terminal plotting backend - Utility Functions

Bar plot rendering for memory/vector backends

Box plot rendering for memory backends (shared for raster/PDF via context)

Color space conversions and colormap functionality

Core color parsing functionality for matplotlib-compatible color syntax

Color parsing and management for matplotlib-compatible color syntax

Abstract base class for plotting backends

Contour polygon decomposition for extracting filled regions

Input validation for coordinate arrays and edge case handling

Error bar plot operations module

Error handling module for fortplot library Provides centralized error management with status codes and messages

Main plotting interface - compatibility wrapper for refactored modules

Figure animation support functionality Extracted from fortplot_figure_core.f90 for size reduction (SRP compliance)

Box plot implementation module

Comprehensive operations interface for fortplot figure core

Property accessor methods extracted from fortplot_figure_core

Figure backward compatibility and animation support module

Figure I/O and rendering operations module

Figure data range management module

Figure histogram functionality module

File I/O operations for figure backends Contains save operations for PNG, PDF, and ASCII formats

Figure core operations module for fortplot_figure_core

Plot creation methods for figure_t

Figure data range management functionality Extracted from fortplot_figure_core.f90 for size reduction (SRP compliance)

Figure rendering pipeline module

Figure streamline functionality module

Utility functions for figure operations

Shared interpolation utilities for contour plotting

LaTeX command parser for Greek letters and mathematical symbols

Legend module following SOLID principles

Line plot rendering module

Simple logging facility for fortplot library Allows control over console output verbosity and warning suppression

Marker rendering module

Mathematical text rendering with superscripts and subscripts Supports matplotlib-like syntax: x^2, y_i, x_{text}, y^{superscript}

Slim matplotlib-compatible facade that aggregates specialised wrappers

Contour, field, and vector visualisation wrappers for matplotlib facade

New matplotlib-compatible plot functions added for issue #1178 Includes: imshow, pie, polar, step, stem, fill, fill_between, twinx, twiny

Memory-only backend for Windows CI performance testing

Operating system detection and environment utilities

Path manipulation and normalization utilities

PDF backend main interface (unified coordinates using plot area)

PDF coordinate transformation and polymorphic method support Handles coordinate normalization and backend-specific method implementations

PDF-specific drawing utility functions

PDF marker and graphics state operations Handles marker drawing, color management, and graphics state operations

PDF text escaping and symbol mapping utilities

High level PDF text drawing routines

Pie chart rendering helpers for polygon backends

Plot annotation operations module

Contour and pcolormesh plotting functionality

Statistical plotting functionality

PNG file validation using internal format checks (no shell execution) CRITICAL: Every PNG file MUST be validated after creation

Main raster plotting context - reduced from 931 lines by extracting specialized modules

Core raster image management and basic operations Extracted from fortplot_raster.f90 for size reduction (SRP compliance)

Raster axis labels (title, xlabel, ylabel) rendering functionality Extracted from fortplot_raster_axes.f90 for single responsibility principle

Raster marker drawing functions

Specialized rendering functionality for raster backend Extracted from fortplot_raster.f90 for size reduction (SRP compliance)

Raster tick marks and tick labels rendering functionality Extracted from fortplot_raster_axes.f90 for single responsibility principle

Scale transformation module for coordinate system transformations

Backend-agnostic text rendering using STB TrueType Provides iso_c_binding interface to stb_truetype.h functions

DOPRI5 (Dormand-Prince 5(4)) integrator for streamline computation Provides adaptive step size control and high-order accuracy

Shared utilities for streamplot arrow placement

Complete matplotlib-compatible streamplot implementation Following matplotlib's streamplot.py EXACTLY

System command operations module

Timeout-safe system operations for Windows CI reliability SECURITY: All timeout command execution disabled for security compliance

Unified secure test utilities module Provides comprehensive test file management with proper cleanup Replaces all previous test helper modules with secure implementation

Main text module that provides unified interface to font and rendering subsystems

Small helpers for preparing text for backends

Thin facade module that re-exports shared layout utilities and raster hooks

Core tick calculation algorithms for linear scales

Specialized tick generation for logarithmic and symmetric logarithmic scales

Sorting utilities for fortplot

Shared vector graphics functionality for backends like PDF, SVG, etc. Extracted from PDF backend to provide reusable vector drawing primitives

Report generation and CI integration for functionality verification Split from fortplot_functionality_verification.f90 for file size compliance (Issue #884)

Windows-specific test helpers for CI compatibility Issue #300: Windows CI environment compatibility

Pure Fortran implementation of zlib compression, decompression, and CRC32 Ported from STB image libraries for self-contained PNG support