GIMP 3.2.6 Released: Preparations for GTK4 Migration and Performance Improvements

GIMP 3.2.6, the latest version of GIMP widely used as an open-source alternative for image editing software, was released on September 10, 2026. This update features feature additions and bug fixes, along with early-stage preparations for a future migration to GTK4. According to reporting by Michael Larabel of Phoronix, the development team has begun work toward the next toolkit migration, even though it has just finished the years-long migration from GTK2 to GTK3.

The long-awaited GIMP 3.0 release for transitioning from GTK2 to GTK3 only saw its stable release last year. But with GTK4 already being out for years, GIMP developers have begun making some very early preparations toward an inevitable GTK4 port.

The released GIMP 3.2.6 is available via GIMP.org. In addition to Linux and Windows, a system is now in place to generate macOS packages simultaneously. It also includes security fixes and minor bug fixes, improving stability.

The Role of GIMP 3.2.6

GIMP 3.0 was a major update involving the migration from GTK2 to GTK3, and its stable version was released in 2025. In the process of moving away from more than a decade of GTK2-based development, rendering processes and the user interface were gradually revamped. GIMP 3.2.6 is positioned as a minor update in the 3.0 series, but it contains more than just maintenance updates.

About six years have already passed since GTK4 was released. As many desktop environments and related libraries move to support GTK4, GIMP is in a position where it cannot avoid a future migration. In this 3.2.6 release, the development team has begun cleaning up code to avoid the use of deprecated features and making internal changes to improve compatibility with GTK4. The migration from GTK3 to GTK4 is said to be less invasive than the migration from GTK2 to GTK3, but it will still be a large-scale undertaking. There is a view that GIMP 4.0, which could become a future major version, will be GTK4-based, but it is expected to still take time to realize.

Performance Improvements for Loading Large

Numbers of Fonts

A notable performance improvement in GIMP 3.2.6 is the handling of loading large numbers of fonts. Previously, in environments with many font files installed on the system, there were reported problems with longer startup times and delays when typing with the text tool and when displaying and closing the font list. This update is said to bring many improvements in this area.

While the delays have not been completely eliminated, faster startup and improved responsiveness when entering text have been confirmed. The process of closing the font list has also been made lighter, reducing waiting time in everyday editing work. Font management is a frequently used feature for image editing and DTP purposes, and the effects are particularly noticeable in environments where designers and editors have installed many typefaces. The development team says further performance gains can be expected at the time of the migration to GTK4, with potential contributions from improved rendering and caching mechanisms on the toolkit side.

This kind of optimization needs to proceed in parallel with hardware evolution. On consumer devices, high-performance portable hardware such as the MSI Claw 8 EX AI+ with Intel Arc G3 Extreme to Launch on June 23 has appeared, raising demands for processing performance for creative uses. At the same time, fast startup and smooth operation on the software side are becoming increasingly important as factors that determine perceived quality.

Preparations for Future GTK4 Migration

The most notable change this time is that preparatory work for the GTK4 migration has begun to be reflected in the codebase. GIMP has only just completed the migration to GTK3 with GIMP 3.0, but GTK4 is already at a mature stage. GIMP developers are replacing deprecated API calls and removing patterns that would hinder the future migration.

From GTK3 to GTK4, the mechanisms for event handling, rendering models, and layout management have changed. The migration may require reimplementation of widgets and rewriting of custom drawing code. For a large codebase with a long history like GIMP’s, gradual preparation is essential. This 3.2.6 release is positioned not as a direct switch to GTK4, but as groundwork to improve compatibility with GTK4 within the scope of GTK3.

This approach can be seen as a realistic choice based on past migration experience. The migration from GTK2 to GTK3 required a long period of development stagnation and extensive internal rework. To ensure a smooth migration to GTK4, it is effective to eliminate deprecated features early and replace them with implementations in line with the migration guide. It has been suggested that a GTK4-compatible version may appear as GIMP 4.0 in the future, but no specific timeline has been disclosed. From the perspective of ensuring sustainable development, gradual migration preparation is a reasonable decision.

New Features for Layer Groups and Pen Input

On the feature side, support for the “Cut” operation on layer groups has been added. Processing that was previously limited to individual layers can now be performed on a group basis, streamlining workflows that handle multiple layers together. In editing that makes heavy use of compositing and masking, group-level operations help reduce working time.

In painting features, new “Barrel Rotation” dynamic input has been added. This is input that detects rotation around the pen axis, and is available with compatible new Wacom pens. It is now possible to change brush angle and shape according to pen rotation, which can be used for expressions where the rotation of the writing instrument should be reflected, such as calligraphy and texture rendering. Deeper integration between hardware and software expands the range of expression in digital drawing.

This evolution of input devices is linked to diversification across peripherals as a whole. For example, as shown by the case of the New Google Home Speaker Falls Short of 6-Year-Old Nest Audio in Sound Quality, generational changes in hardware do not necessarily bring all-around performance improvements. For software like GIMP, where input precision and responsiveness are required, support for new input methods determines the creative experience.

Simultaneous Availability of macOS Packages

In terms of platform support, a new system is in place to generate macOS packages simultaneously with those for Linux and Windows. Previously, there could be variations in the timing of macOS releases, but this change enables simultaneous distribution across all platforms. By synchronizing the development cycle, users can install the latest version without being aware of differences between versions.

macOS has a high share of use in creative fields and accounts for a certain proportion of GIMP users. Automation of package generation and maintenance of the build environment directly lead to continuous quality assurance. In open-source projects, testing and distribution on each platform are often maintained on a volunteer basis, and achieving simultaneous releases is also an indicator of operational maturity.

In the areas of media playback and file management, software designed for use across multiple platforms and over networks is increasing, such as LitPlayer, SMB/Jellyfin-Compatible Android Video Player. Even for desktop applications like GIMP, a consistent delivery system across multiple environments improves user convenience.

Security Fixes and Overall Outlook

GIMP 3.2.6 includes several security fixes. While details of specific vulnerabilities are provided in the release information on GIMP.org, hardening is believed to have been made in parts that handle external data, such as image file parsing and the plug-in mechanism. Since open-source image editing software handles diverse file formats, countermeasures against attack vectors via malicious data are important. Regular security updates also support reliability for adoption in businesses and educational institutions.

Many bug fixes, including small ones, were also incorporated. As a minor update in the stable series, it focuses on improving the behavior of existing features and eliminating causes of crashes. GIMP is often positioned as an alternative to Adobe Photoshop, and stability for professional use is one of the reasons for choosing it. This update is not a major feature overhaul, but combines hardening of the foundation with groundwork for the future.

The future focus is on how quickly the migration to GTK4 will proceed. The development team explains that it is currently at the early preparation stage, and full migration will require additional design changes and testing. The rendering performance and input handling improvements offered by GTK4 could contribute to better operability in GIMP, but compatibility during the transition period and impacts on the plug-in ecosystem also need to be considered. A realistic path can be seen in accumulating gradual improvements in the 3.2 series while switching in a future major version.

Editorial Opinion

In the short term, we see the font loading improvements and simultaneous macOS distribution in GIMP 3.2.6 as bringing direct benefits to the work efficiency of existing users. Especially in production environments handling many typefaces, easing delays in startup and text editing will reduce day-to-day stress. The GTK4 preparations show little visible change, but advancing the removal of deprecated features early is expected to spread out future migration costs.

From a long-term perspective, we assess that the migration to GTK4 will be a branching point that determines GIMP’s competitiveness. A toolkit refresh will bring modernized rendering performance, HiDPI support, and input handling, while also posing the challenge of maintaining compatibility for plug-ins and extensions. If the migration proceeds smoothly, its positioning as a Photoshop alternative will be strengthened, and its value as a creative foundation for the Linux desktop as a whole will also increase.

As a question from the editorial team, the issue remains of how quickly a huge open-source codebase should complete a toolkit migration. If migration is delayed to prioritize stability, it may fall behind in performance and operability in modern environments. On the other hand, rapid migration risks bugs and disruption to extensions.

References

• “GIMP 3.2.6 Released With Some Early Preparations Toward Eventual GTK4 Port”, by Michael Larabel — Phoronix, 2026-09-10T22:12:22.000Z (ARR)
• Source URL: https://www.phoronix.com/news/GIMP-3.2.6-Released