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

Default contour level generation compatible with matplotlib MaxNLocator

Contour plot rendering module

Minimal datetime utilities for date/time axes.

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

Backward compatibility methods for figure_t

CORE TYPE DEFINITION

Advanced plotting operations extracted from fortplot_figure_core

Figure configuration operations module

Core operations implementations extracted from fortplot_figure_core

Utility operations extracted from fortplot_figure_core

Figure grid functionality module

Figure initialization and configuration module

Figure lifecycle management module for fortplot_figure_core

Figure plot data management module

Figure property management module for fortplot_figure_core

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

Shared rendering engine for figure outputs.

Scatter plot implementation module

Subplot management functionality for figure_t

File system operations module

Global figure instance management for fortplot Provides access to the shared global figure used by pyplot-style functions

Separate positioning for tick labels vs axis labels Follows matplotlib exact spacing measurements

Layout and margin calculations for plotting backends

Shared legend layout calculations following DRY principle

Line pattern and style rendering algorithms

Common margin and axis functionality for plotting backends

Shared marker utilities following DRY principles Eliminates code duplication between PNG and PDF backends

Matplotlib-compatible API wrapper for fortplot Main facade module that re-exports all matplotlib-style functions

Axes, scale, and labelling helpers for the matplotlib facade

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 secondary axes rendering for twin axes support Handles drawing of secondary Y-axis (right side) and X-axis (top)

PDF text measurement helpers

Mixed-font PDF text segmentation helpers

Bar chart plotting functionality

Core plot data structures - extracted from fortplot_figure_core

Advanced plotting methods (contour, bar, histogram, boxplot, streamplot)

Polar coordinate transformation and utilities

3D to 2D projection module for rendering 3D plots in 2D backends

Raster axes coordination module (refactored for size compliance) Orchestrates tick and label rendering through specialized modules

Main raster drawing module that provides unified interface to drawing subsystems

Module for handling line styling in raster images

Basic raster drawing primitives and utilities

Raster-specific text rendering primitives (glyph rasterization, mathtext drawing)

Figure rendering pipeline orchestrator module

Scatter plot operations module

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

Matplotlib-inspired streamplot implementation.

Surface rendering module for 3D surface plots

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