aseprite/aseprite
Oct 2024 – May 2026
18 Months active
Languages Used
C++LuaCCMakeObjective-CShell
Technical Skills
Bug FixingC++EXIF Data HandlingImage ProcessingSoftware DevelopmentBrush Engine
Gaspar Capello
PROFILE
Gaspar Capello
Over 18 months, contributed to aseprite/aseprite by developing new features and delivering robust bug fixes that improved editor reliability, rendering accuracy, and user workflow. Work included enhancements to the brush engine, symmetry operations, and timeline UI, as well as targeted fixes for color management, file handling, and session recovery. Leveraged C++ and Lua scripting to implement solutions such as EXIF-based JPEG orientation, power-of-two sprite sheet sizing, and optimized tilemap selection. Focused on maintainable code, test-driven validation, and cross-platform UI development, consistently addressing user-reported issues and refining core editor functionality to support artists and automation workflows.
Overall Statistics
Feature vs Bugs
19%Features
Repository Contributions
49Total
Bugs
30
Commits
49
Features
7
Lines of code
295,216
Activity Months18
Your Network
28 peopleWork History
May 2026
1 Commits
May 1, 2026May 2026 dedicated to stabilizing keyboard input handling during native file dialog usage in aseprite/aseprite. Key accomplishment was the Cmd (⌘) key handling bug fix to prevent a persistent key state after closing the native file dialog, ensuring subsequent key presses are registered correctly. This directly improves reliability of file operations (e.g., Cmd+O) and reduces edge-case regressions. The change resets all held keys in the internal key press array upon dialog close, addressing the regression tracked as issue #4817. Overall impact: Improved user experience with keyboard shortcuts, higher stability of the UI around file dialogs, and reduced support/debug time for Cmd-key related issues. Technologies/skills demonstrated: C++ event handling and input state management, cross-platform GUI integration, careful state reset patterns, and disciplined Git-based changes with issue-tracking alignment.
1 Commits
May 1, 2026May 2026 dedicated to stabilizing keyboard input handling during native file dialog usage in aseprite/aseprite. Key accomplishment was the Cmd (⌘) key handling bug fix to prevent a persistent key state after closing the native file dialog, ensuring subsequent key presses are registered correctly. This directly improves reliability of file operations (e.g., Cmd+O) and reduces edge-case regressions. The change resets all held keys in the internal key press array upon dialog close, addressing the regression tracked as issue #4817. Overall impact: Improved user experience with keyboard shortcuts, higher stability of the UI around file dialogs, and reduced support/debug time for Cmd-key related issues. Technologies/skills demonstrated: C++ event handling and input state management, cross-platform GUI integration, careful state reset patterns, and disciplined Git-based changes with issue-tracking alignment.
May 2026
April 2026
3 Commits • 1 Features
Apr 1, 2026April 2026—aseprite/aseprite: Focused on solidifying tile-based editing reliability and rendering fidelity. Key work includes performance optimizations for the Tilemap Selection Tool in Tiles mode with large tiles, enhancing responsiveness and enabling reliable single-tile selection; and a zoom rendering fix for image layers at 20% to preserve visual accuracy. These changes deliver tangible business value by improving editor responsiveness, reducing user-frustration, and ensuring consistent rendering across common zoom levels. Demonstrated skills in performance optimization, rendering pipelines, and robust bug-fix workflows with clear, traceable commits.
April 2026
3 Commits • 1 Features
Apr 1, 2026April 2026—aseprite/aseprite: Focused on solidifying tile-based editing reliability and rendering fidelity. Key work includes performance optimizations for the Tilemap Selection Tool in Tiles mode with large tiles, enhancing responsiveness and enabling reliable single-tile selection; and a zoom rendering fix for image layers at 20% to preserve visual accuracy. These changes deliver tangible business value by improving editor responsiveness, reducing user-frustration, and ensuring consistent rendering across common zoom levels. Demonstrated skills in performance optimization, rendering pipelines, and robust bug-fix workflows with clear, traceable commits.
March 2026
5 Commits • 1 Features
Mar 1, 2026Monthly summary for 2026-03: Deliveries focused on reliability, rendering accuracy, and hardware-friendly output, with targeted fixes and feature enhancements driving tangible business value for content creators using aseprite/aseprite.
5 Commits • 1 Features
Mar 1, 2026Monthly summary for 2026-03: Deliveries focused on reliability, rendering accuracy, and hardware-friendly output, with targeted fixes and feature enhancements driving tangible business value for content creators using aseprite/aseprite.
March 2026
February 2026
1 Commits
Feb 1, 2026February 2026: Fixed a critical Time-Lapse Recorder issue in aseprite/aseprite where the first canvas draw would render at (0,0), causing misalignment in scripted time-lapse workflows. The regression originated from a beta-branch merge (1.3.17) and an earlier commit (05f2a1e7); the fix was implemented in the Lua drawing path (commit d1624d9d039092c46a04016e68313ec1c9a3c65f). This enhancement improves reliability and accuracy of time-lapse recordings, reducing frame misalignment and support overhead. Demonstrated skills include debugging regression, Lua scripting, and maintaining clear version-control traceability linked to issue #5679.
February 2026
1 Commits
Feb 1, 2026February 2026: Fixed a critical Time-Lapse Recorder issue in aseprite/aseprite where the first canvas draw would render at (0,0), causing misalignment in scripted time-lapse workflows. The regression originated from a beta-branch merge (1.3.17) and an earlier commit (05f2a1e7); the fix was implemented in the Lua drawing path (commit d1624d9d039092c46a04016e68313ec1c9a3c65f). This enhancement improves reliability and accuracy of time-lapse recordings, reducing frame misalignment and support overhead. Demonstrated skills include debugging regression, Lua scripting, and maintaining clear version-control traceability linked to issue #5679.
January 2026
1 Commits
Jan 1, 2026January 2026 (2026-01) monthly summary for aseprite/aseprite focused on user experience stabilization and bug fix quality. The main delivered item was a UI reliability improvement: pressing F2 now auto-focuses the Layer Name field, addressing UX friction where users previously had to manually click to edit layer names. The fix aligns with usability goals and reduces the steps required to rename layers, improving artist workflow. Implemented as part of the tracked work and connected to issue #5609. The change is recorded in commit 2936b1a388ea8cf894b554773573f6b1f489813d.
1 Commits
Jan 1, 2026January 2026 (2026-01) monthly summary for aseprite/aseprite focused on user experience stabilization and bug fix quality. The main delivered item was a UI reliability improvement: pressing F2 now auto-focuses the Layer Name field, addressing UX friction where users previously had to manually click to edit layer names. The fix aligns with usability goals and reduces the steps required to rename layers, improving artist workflow. Implemented as part of the tracked work and connected to issue #5609. The change is recorded in commit 2936b1a388ea8cf894b554773573f6b1f489813d.
January 2026
November 2025
3 Commits • 1 Features
Nov 1, 2025November 2025 monthly summary: Focused on enhancing editing efficiency and color-masking reliability in aseprite/aseprite. Delivered Layer Visibility Isolation Command enabling users to quickly isolate the active layer by hiding all other layers; included a new command class and UI key-binding updates (commit 6bdfdec840c935f458ed5dd56c3710dca788be3c). Fixed a critical color mask alpha handling bug in HSL+/HSV+ filters that caused unintended color transformations during Replace Color; added tests to verify Hue/Saturation mask handling in hsv_add and hsl_add modes (commits cb0dfa828367f8a5a20bf33380cfd216a785778b and dd77214a80503b933d6ea2ca72bb03f6ec2cabe2). These changes improve editing throughput, reduce surprising color results, and strengthen test coverage. Technologies employed include command architecture, UI binding, and test-driven validation.
November 2025
3 Commits • 1 Features
Nov 1, 2025November 2025 monthly summary: Focused on enhancing editing efficiency and color-masking reliability in aseprite/aseprite. Delivered Layer Visibility Isolation Command enabling users to quickly isolate the active layer by hiding all other layers; included a new command class and UI key-binding updates (commit 6bdfdec840c935f458ed5dd56c3710dca788be3c). Fixed a critical color mask alpha handling bug in HSL+/HSV+ filters that caused unintended color transformations during Replace Color; added tests to verify Hue/Saturation mask handling in hsv_add and hsl_add modes (commits cb0dfa828367f8a5a20bf33380cfd216a785778b and dd77214a80503b933d6ea2ca72bb03f6ec2cabe2). These changes improve editing throughput, reduce surprising color results, and strengthen test coverage. Technologies employed include command architecture, UI binding, and test-driven validation.
October 2025
2 Commits
Oct 1, 2025October 2025 (Month: 2025-10) - Aseprite maintenance cycle focused on UI stability and UX polish in the editing workflow. Delivered targeted bug fixes that improve drag interactions and autoscroll dialog behavior, reducing edge-case UI glitches and enhancing reliability for common animation tasks.
2 Commits
Oct 1, 2025October 2025 (Month: 2025-10) - Aseprite maintenance cycle focused on UI stability and UX polish in the editing workflow. Delivered targeted bug fixes that improve drag interactions and autoscroll dialog behavior, reducing edge-case UI glitches and enhancing reliability for common animation tasks.
October 2025
September 2025
2 Commits
Sep 1, 2025Concise monthly summary for 2025-09 focusing on key features delivered, major bugs fixed, overall impact, and technologies demonstrated. Highlights: two critical fixes in aseprite/aseprite that stabilize UI rendering and editing workflows, delivering tangible business value for artists and teams using the tool.
September 2025
2 Commits
Sep 1, 2025Concise monthly summary for 2025-09 focusing on key features delivered, major bugs fixed, overall impact, and technologies demonstrated. Highlights: two critical fixes in aseprite/aseprite that stabilize UI rendering and editing workflows, delivering tangible business value for artists and teams using the tool.
August 2025
3 Commits
Aug 1, 2025August 2025: Focused on improving rendering accuracy and editor reliability in aseprite/aseprite. Delivered targeted bug fixes that enhance visual fidelity, reduce user confusion, and strengthen color management compliance. Notable outcomes include corrected color space handling for the back layer, refined saturation blending, and accurate pivot calculations in tiled mode. These changes reduce rendering inconsistencies, improve workflow confidence for artists and developers, and lay groundwork for future color pipeline improvements.
3 Commits
Aug 1, 2025August 2025: Focused on improving rendering accuracy and editor reliability in aseprite/aseprite. Delivered targeted bug fixes that enhance visual fidelity, reduce user confusion, and strengthen color management compliance. Notable outcomes include corrected color space handling for the back layer, refined saturation blending, and accurate pivot calculations in tiled mode. These changes reduce rendering inconsistencies, improve workflow confidence for artists and developers, and lay groundwork for future color pipeline improvements.
August 2025
July 2025
4 Commits • 1 Features
Jul 1, 2025July 2025: Delivered three bug fixes and one feature enhancement for aseprite/aseprite focused on rendering integrity, session reliability, and macOS UX improvements. Improvements include accurate color rendering for Skia surfaces, robust session recovery detection, artifact-free GIF rendering with transparency, and upgraded macOS Sequoia thumbnail generation via QuickLookThumbnailing with updated bundling.
July 2025
4 Commits • 1 Features
Jul 1, 2025July 2025: Delivered three bug fixes and one feature enhancement for aseprite/aseprite focused on rendering integrity, session reliability, and macOS UX improvements. Improvements include accurate color rendering for Skia surfaces, robust session recovery detection, artifact-free GIF rendering with transparency, and upgraded macOS Sequoia thumbnail generation via QuickLookThumbnailing with updated bundling.
June 2025
1 Commits
Jun 1, 2025June 2025 monthly summary for aseprite/aseprite. Focused maintenance month with a critical stability fix in the grid-snapping workflow. No new features delivered this cycle; primary work centered on bug resolution to improve precision and reduce user-frustration.
1 Commits
Jun 1, 2025June 2025 monthly summary for aseprite/aseprite. Focused maintenance month with a critical stability fix in the grid-snapping workflow. No new features delivered this cycle; primary work centered on bug resolution to improve precision and reduce user-frustration.
June 2025
May 2025
1 Commits
May 1, 2025May 2025 monthly summary for aseprite/aseprite focusing on business value and technical achievements. The month centered on stabilizing the export pipeline and color-mode handling to protect user assets and improve performance. Key accomplishments include fixes to the tileset export process and streamlining the export workflow for Sprite Sheet exports, delivering tangible reliability improvements and code quality gains.
May 2025
1 Commits
May 1, 2025May 2025 monthly summary for aseprite/aseprite focusing on business value and technical achievements. The month centered on stabilizing the export pipeline and color-mode handling to protect user assets and improve performance. Key accomplishments include fixes to the tileset export process and streamlining the export workflow for Sprite Sheet exports, delivering tangible reliability improvements and code quality gains.
March 2025
1 Commits • 1 Features
Mar 1, 2025Concise monthly summary for March 2025 focusing on delivering a user-facing feature and stabilizing the timeline UI in aseprite/aseprite.
1 Commits • 1 Features
Mar 1, 2025Concise monthly summary for March 2025 focusing on delivering a user-facing feature and stabilizing the timeline UI in aseprite/aseprite.
March 2025
February 2025
7 Commits
Feb 1, 2025February 2025 monthly update: Delivered critical rendering fixes and usability improvements across the core Aseprite editor, with a focus on correctness of visual output, reliable Undo/Redo behavior, and safer export workflows. The work spanned three main areas: Editor Visual Rendering, Image Rendering and Undo, and Symmetry/Export, implemented via targeted changes in the aseprite/aseprite repository. These changes improved timeline thumbnail scaling, onionskin redraw for empty cels, and alpha-aware slice rendering; corrected source-pixel rendering for BlendMode.SRC and added undo support for cel.image:clear; refined symmetry axis rendering and ensured the Export As dialog appends -export to prevent overwrites. Collectively, these updates reduce edge-case rendering bugs, enhance script interface usability, and protect users from accidental overwrites, delivering tangible business value in stability, UX, and automation readiness.
February 2025
7 Commits
Feb 1, 2025February 2025 monthly update: Delivered critical rendering fixes and usability improvements across the core Aseprite editor, with a focus on correctness of visual output, reliable Undo/Redo behavior, and safer export workflows. The work spanned three main areas: Editor Visual Rendering, Image Rendering and Undo, and Symmetry/Export, implemented via targeted changes in the aseprite/aseprite repository. These changes improved timeline thumbnail scaling, onionskin redraw for empty cels, and alpha-aware slice rendering; corrected source-pixel rendering for BlendMode.SRC and added undo support for cel.image:clear; refined symmetry axis rendering and ensured the Export As dialog appends -export to prevent overwrites. Collectively, these updates reduce edge-case rendering bugs, enhance script interface usability, and protect users from accidental overwrites, delivering tangible business value in stability, UX, and automation readiness.
January 2025
2 Commits
Jan 1, 2025January 2025 monthly work summary focused on stability and correctness in the aseprite repository. Delivered two critical fixes that remove visual artifacts and prevent crashes in low-zoom scenarios, and introduced targeted rendering optimizations to support simple scale-up/scale-down cases. These efforts reduce user-reported issues, improve reliability for tilemap editing and custom-ratio rendering, and lay groundwork for future tilemap tooling enhancements. All changes reference the aseprite/aseprite repo and are tied to concrete issues to close gaps in the last-trace policy and old render engine pathways.
2 Commits
Jan 1, 2025January 2025 monthly work summary focused on stability and correctness in the aseprite repository. Delivered two critical fixes that remove visual artifacts and prevent crashes in low-zoom scenarios, and introduced targeted rendering optimizations to support simple scale-up/scale-down cases. These efforts reduce user-reported issues, improve reliability for tilemap editing and custom-ratio rendering, and lay groundwork for future tilemap tooling enhancements. All changes reference the aseprite/aseprite repo and are tied to concrete issues to close gaps in the last-trace policy and old render engine pathways.
January 2025
December 2024
3 Commits
Dec 1, 2024December 2024: Focused on stability, reliability, and UI correctness in aseprite/aseprite. Delivered targeted bug fixes that reduce data loss risk, improve recent-files handling, and restore reliable keyboard shortcuts configuration. The work strengthens core editor interactions and user workflow consistency, laying groundwork for safer releases and easier future maintenance.
December 2024
3 Commits
Dec 1, 2024December 2024: Focused on stability, reliability, and UI correctness in aseprite/aseprite. Delivered targeted bug fixes that reduce data loss risk, improve recent-files handling, and restore reliable keyboard shortcuts configuration. The work strengthens core editor interactions and user workflow consistency, laying groundwork for safer releases and easier future maintenance.
November 2024
7 Commits • 1 Features
Nov 1, 2024November 2024 monthly summary for aseprite/aseprite focused on delivering a robust brush symmetry feature, stabilizing core editor workflows, and polishing the user interface. Key outcomes include a reinforced symmetry system with on-demand brush variant generation and multi-mode support, stability improvements across dynamics interactions, and improvements to cel management and z-order handling that reduce workflow friction and preserve intended artwork.
7 Commits • 1 Features
Nov 1, 2024November 2024 monthly summary for aseprite/aseprite focused on delivering a robust brush symmetry feature, stabilizing core editor workflows, and polishing the user interface. Key outcomes include a reinforced symmetry system with on-demand brush variant generation and multi-mode support, stability improvements across dynamics interactions, and improvements to cel management and z-order handling that reduce workflow friction and preserve intended artwork.
November 2024
October 2024
2 Commits • 1 Features
Oct 1, 2024Summary for 2024-10: Delivered two high-impact changes in aseprite/aseprite focused on stability and user experience. 1) Magic Wand Tool Tiled Mode Bug Fix – corrected point-in-canvas detection in tiled configurations (isPointInsideCanvas) to resolve issue #4659. Commit: f7a9f44cec65d07ed2f27616d32fe9e71e0fffb9. 2) JPEG Orientation Support via EXIF – added orientation adjustment during image loading so JPEGs display with correct orientation per EXIF, improving import UX. Commit: 339221c2889257f6cea73b70d95ccdcda343a2b8. Impact: increased reliability in tiled editing workflows and more intuitive photo imports, reducing user confusion and support friction. Technologies/skills demonstrated: advanced canvas boundary logic, image metadata handling, and robust UX focus.
October 2024
2 Commits • 1 Features
Oct 1, 2024Summary for 2024-10: Delivered two high-impact changes in aseprite/aseprite focused on stability and user experience. 1) Magic Wand Tool Tiled Mode Bug Fix – corrected point-in-canvas detection in tiled configurations (isPointInsideCanvas) to resolve issue #4659. Commit: f7a9f44cec65d07ed2f27616d32fe9e71e0fffb9. 2) JPEG Orientation Support via EXIF – added orientation adjustment during image loading so JPEGs display with correct orientation per EXIF, improving import UX. Commit: 339221c2889257f6cea73b70d95ccdcda343a2b8. Impact: increased reliability in tiled editing workflows and more intuitive photo imports, reducing user confusion and support friction. Technologies/skills demonstrated: advanced canvas boundary logic, image metadata handling, and robust UX focus.
Activity
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Quality Metrics
Correctness95.2%
Maintainability89.0%
Architecture87.4%
Performance88.6%
AI Usage20.0%
Skills & Technologies
Programming Languages
CC++CMakeLuaObjective-CShell
Technical Skills
Brush EngineBug FixBug FixingBuild SystemsC++C++ DevelopmentC++ ProgrammingC++ developmentCLI DevelopmentCMakeCode OptimizationColor ManagementColor TheoryCommand PatternCrash Recovery
Repositories Contributed To
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