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Martín Capello

PROFILE

Martín Capello

Over 14 months, contributed to aseprite/aseprite by developing and refining core features for animation and graphics editing, focusing on robust C++ engineering and cross-platform maintainability. Delivered 22 features and resolved 19 bugs, enhancing workflows such as layer management, timeline editing, and brush tooling. Applied modern C++ practices, Lua scripting, and build system configuration to improve UI responsiveness, memory safety, and extensibility. Refactored legacy components for better code organization and introduced automated testing to reduce regressions. Addressed complex issues in event handling, drag-and-drop, and file I/O, resulting in a more stable, user-friendly application for artists and developers alike.

Overall Statistics

Feature vs Bugs

54%Features

Repository Contributions

91Total
Bugs
19
Commits
91
Features
22
Lines of code
5,493
Activity Months14

Work History

December 2025

1 Commits

Dec 1, 2025

December 2025 (2025-12) monthly summary for aseprite project, focusing on brush tooling reliability and code quality. Key achievement: fixed square brush rotation direction by correcting sine-based rotation calculation, ensuring rotation direction matches user expectations and brush strokes align with input. This bug fix reduces user confusion and improves fidelity across drawing sessions. No new features released this month; major bug fix delivered. Impact: improved creator experience, reduced support questions, and more consistent rendering. Technologies demonstrated: rotation transforms accuracy, debugging discipline, and traceable commits.

November 2025

7 Commits • 1 Features

Nov 1, 2025

November 2025 (aseprite/aseprite) focused on UX polish, reliability, and multi-window robustness for core editing tools. Key UI enhancements improved focus management and interaction for radius/text workflows, while error handling and console feedback for drag-and-drop actions were strengthened to improve user guidance and stability. Summary of work: - Consecutive UI refinements across the radius/text tool set: focus-aware text rendering, improved slider popups, context bar options visibility, corner radius entry interactions, and robust mouse capture flow, with preserved corner radius preferences for a consistent user experience across sessions. (Commits: ce34225f, 055702f0, 0d03f6e, a93d39fa, dd660f61) - Drag-and-drop and console improvements: explicit error messaging for unsupported image formats and reliable console output by flushing and displaying errors in onDrop scenarios. (Commits: ea202f53, 44a94a14) - Outcome: enhanced usability and stability for editing workflows that rely on precise focus management and responsive drag-and-drop UX, particularly in multi-window contexts. Technologies/skills demonstrated: C++ UI programming, event-driven design, focus management, multi-window coordination, drag-and-drop handling, console I/O, and UX-focused debugging.

October 2025

10 Commits • 4 Features

Oct 1, 2025

October 2025: Focused on improving user experience, reliability, and maintainability. Delivered notable features across corner radius controls, brush tools UI, and input/scripting UX, while stabilizing multi-monitor window behavior and refactoring for future resilience. Business value includes smoother artist workflows, reduced scripting friction, and more robust cross-display behavior, enabling faster iteration with fewer interruptions.

September 2025

2 Commits

Sep 1, 2025

September 2025: Reliability and build-environment improvements across aseprite/aseprite and aseprite/sentry-native. Delivered Unicode-safe extension configuration handling and updated Crashpad submodule for aseprite build environment, enhancing stability, extension ecosystem robustness, and crash reporting.

August 2025

1 Commits • 1 Features

Aug 1, 2025

Concise monthly summary for August 2025 focused on architectural improvement and maintainability of aseprite/aseprite. Delivered a refactor that centralizes layer index retrieval, reducing duplication and tightening the LayerGroup API. This work improves cross-component consistency and sets the foundation for safer future changes across the Timeline and layer management flow.

July 2025

1 Commits

Jul 1, 2025

July 2025 - aseprite/aseprite: Timeline File Drop Crash Fix and robustness improvements. Key achievements: - Implemented get_layer_index and getLayerIndexFromSprite to determine layer indices accurately, including hidden layers, stabilizing file drops on the timeline. - Fixed crash when dropping files onto the timeline (commit d61ae919adb38ce527f05f7895aebf1c1687980e, fix #5289). - Improved robustness of the file drop UX across all timeline configurations. Impact: - Increased stability and reliability of asset import, reducing user-impacting crashes and improving productivity. Technologies/skills demonstrated: - C++ core timeline logic, layer indexing, hidden-layer handling, debugging, regression testing.

June 2025

2 Commits

Jun 1, 2025

June 2025 monthly summary for aseprite/aseprite focused on reliability improvements and cross-version compatibility. Delivered targeted bug fixes that restore correct UI signaling and broaden Windows build support, reducing user friction and enabling legacy environments.

April 2025

17 Commits • 3 Features

Apr 1, 2025

April 2025 — ASEprite development focused on improving artist workflow, stability, and maintainability in aseprite/aseprite. The team delivered major UX enhancements for layers and timeline, fixed critical drop-related issues, and continued modernizing the codebase for memory safety and cross-platform readiness.

March 2025

5 Commits • 2 Features

Mar 1, 2025

2025-03 Monthly Summary for aseprite/aseprite: Key features delivered include Slice Duplication and Copy-Paste Enhancements, Layer UUIDs in Lua Scripting API, and a Drawing Point Validation bug fix. These changes improve artist workflow, scripting capabilities, and tool reliability, delivering business value through smoother editing, extensibility, and fewer runtime issues.

February 2025

6 Commits • 1 Features

Feb 1, 2025

February 2025: Delivered targeted UX and stability improvements for aseprite/aseprite. Implemented a dedicated UI entry to display layer UUIDs, hardened layer UUID generation and persistence, and fixed critical preview and format-loading workflows to improve responsiveness and predictability. These changes reduce user friction, improve data integrity, and strengthen long-term maintainability.

January 2025

8 Commits • 3 Features

Jan 1, 2025

January 2025 (Month: 2025-01) monthly summary for aseprite/aseprite focusing on delivering stability, data integrity, and user control. Key outcomes include improved timeline rendering stability across UI scales; extended pixel format workflow with fitCriteria and type-safe ColorMode integration plus tests; introduction of Layer UUIDs with UI and IO support; added user-selectable compression formats when saving Cels; and crash prevention when applying filters if the current Cel becomes null. These changes enhance reliability, project management capabilities, and user productivity while expanding test coverage and maintainability.

December 2024

10 Commits • 4 Features

Dec 1, 2024

December 2024 monthly summary for aseprite/aseprite focused on stabilizing core editing workflows, improving memory safety, enhancing UI/UX, and expanding test coverage to reinforce quality and reliability. The work emphasizes business value by reducing crashes, ensuring predictable document states after edits, and delivering features that streamline artist workflow.

November 2024

15 Commits • 2 Features

Nov 1, 2024

November 2024 performance: Delivered core UI/UX improvements, stability fixes, and feature enhancements to aseprite/aseprite that streamline workflows, improve reliability, and support multi-display setups. Implemented a dedicated Mask by Color UI window with a UI toggle, a targeted fix to input handling, and an enhanced sprite sheet import flow with configurable columns/rows and automatic frame bounds calculation. A comprehensive UI/window stability pass addressed clipping, display ownership, open signaling, drag/drop robustness, and interaction nuances across scenarios. These changes reduce user friction, improve cross-project consistency, and demonstrate strong UI architecture, event handling, and cross-platform window management capabilities.

October 2024

6 Commits • 1 Features

Oct 1, 2024

Monthly summary for 2024-10 focusing on stabilizing the UI event system and delivering smoother user workflows in aseprite/aseprite. Implemented reliability improvements for mouse event handling and introduced an Apply button with background processing to streamline filter edits without closing the window. Also performed targeted refactors to simplify the event/callback flow and remove deprecated components, improving maintainability and build hygiene.

Activity

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Quality Metrics

Correctness93.6%
Maintainability92.2%
Architecture90.2%
Performance89.8%
AI Usage20.0%

Skills & Technologies

Programming Languages

C++CMakeGitINILuaMarkdownlua

Technical Skills

API DesignAPI DevelopmentAnimation Software DevelopmentAsset ManagementBug FixBug FixingBuild System ConfigurationBuild SystemsC++C++ DevelopmentC++ ProgrammingC++ developmentClipboard OperationsCode ClarityCode Formatting

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

aseprite/aseprite

Oct 2024 Dec 2025
14 Months active

Languages Used

C++INILuaMarkdownluaCMake

Technical Skills

C++Code OrganizationEvent HandlingFilter ImplementationGUI DevelopmentObject-Oriented Programming

aseprite/sentry-native

Sep 2025 Sep 2025
1 Month active

Languages Used

Git

Technical Skills

Submodule Management