StarRocks Docs: Fixing Invisible Images In Dark Mode

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Hey everyone! Have you noticed some images disappearing when using dark mode on the StarRocks documentation? It's a bit of a visual hiccup, especially when you're trying to understand complex diagrams. Let's dive into what's happening and how we can fix it.

The Case of the Vanishing Images

So, what’s the deal? Several crucial diagrams within the StarRocks documentation have transparent backgrounds. This is totally fine in light mode, where the white background of the page makes everything visible. But, switch to dark mode, and poof! The images blend into the dark background, becoming practically invisible. It’s like a magic trick, but not the good kind, especially when you’re trying to follow a workflow or understand a system architecture.

Affected Areas

This issue pops up in some pretty important sections of the documentation. Here are the pages and image paths affected:

  1. Flink CDC Load
    • docs/en/loading/Flink_cdc_load.md → ../_assets/4.9.2.png
  2. Loading Tools
    • docs/en/loading/loading_tools.md → ../_assets/load_tools.png
  3. SMT (Migration Tool)
    • docs/en/integrations/loading_tools/SMT.md → ../../_assets/load_tools.png
  4. Loading Tools Integration
    • docs/en/integrations/loading_tools/loading_tools_integration.mdx → (via import) ../../_assets/load_tools.png
  5. Query Planning
    • docs/en/best_practices/query_tuning/query_planning.md →
      • ../../_assets/Profile/execution_flow.png
      • ../../_assets/Profile/pipeline_operators.png

These areas cover key topics like real-time data loading using Flink CDC, understanding different loading tools, and crucial aspects of query planning and optimization. Clearly, having these diagrams visible is pretty important for a smooth learning experience.

Spotting the Problem

Reproducing the issue is straightforward. Just follow these simple steps:

  1. Head over to any of the pages listed above.
  2. Find the diagram in question while in light mode – it should look perfectly normal.
  3. Switch your browser or the documentation theme to dark mode.
  4. Ta-da! (Or rather, ta-gone!) The images either disappear completely or blend into the background.

What We Expect vs. What We Get

The expected behavior is pretty simple: all diagrams should be clearly visible in both light and dark themes. Adding a white background to the images should ensure they stand out, no matter the theme. However, the actual behavior is that the images, lacking a background, meld into the dark mode page, becoming unreadable. This can be super frustrating when you're trying to grasp a concept quickly!

Visual Proof

Let's take a look at some before-and-after screenshots to really see the difference.

Light Mode (All Good!)

These images look perfectly fine in light mode, as they should:

Dark Mode (Uh Oh!)

And here's where the trouble begins. These same images become nearly invisible in dark mode:

Why This Matters

Why is fixing this important? Well, clear documentation is crucial for anyone learning and using StarRocks. These diagrams are designed to visually explain complex processes and architectures. When they disappear, it's like trying to assemble a puzzle with missing pieces. It impacts understanding and can slow down the learning process.

Imagine you’re trying to set up Flink CDC for real-time data loading. The diagrams illustrating the workflow are super helpful, but if you can’t see them in dark mode, you’re missing a key part of the puzzle. Similarly, understanding query planning is vital for optimizing performance, and those diagrams showing execution flow and pipeline operators are essential for grasping the concepts.

The Simple Solution

Luckily, the fix is pretty straightforward. The best approach is to add a solid white background to each of the affected image files. This ensures consistent visibility regardless of the theme. No need for complex CSS workarounds here!

The Hit List

Here are the images that need a little background boost:

  • docs/en/_assets/4.9.2.png
  • docs/en/_assets/load_tools.png
  • docs/en/_assets/Profile/execution_flow.png
  • docs/en/_assets/Profile/pipeline_operators.png

By adding a white background to these images, we restore their visibility and make the documentation much more user-friendly.

Under the Hood: Environment and the Dark Mode Challenge

For those curious about the technical details, this issue affects users across various environments:

  • Docs site: docs.starrocks.io
  • Theme: Dark mode
  • Browsers: Chrome, Firefox, Safari, Edge
  • OS: Windows, macOS, Linux

The core problem is that dark mode themes invert the color scheme of a website, which is fantastic for reducing eye strain in low-light conditions. However, if images lack a solid background, they can blend seamlessly into the dark background, leading to the disappearing act we’ve described.

The Ripple Effect: Impact and Accessibility

This fix isn't just about aesthetics; it’s about accessibility. By ensuring diagrams are visible in dark mode, we're improving the experience for all users, especially those who prefer dark mode for its comfort and reduced eye strain. It’s a small change that makes a big difference in how accessible and user-friendly the documentation is.

This improvement directly impacts critical sections of the documentation, including real-time loading workflows and query-planning guides. Ensuring everyone can read these diagrams means a smoother learning experience and a better understanding of StarRocks.

Following Up and Tying Up Loose Ends

This issue is actually a follow-up to a previous fix (#64151) that addressed similar image visibility problems with Primary Key tables. It’s all part of the ongoing effort to make the StarRocks documentation the best it can be!

Conclusion: Brighter Docs for Everyone

So, there you have it! The mystery of the disappearing images in dark mode is solved. By adding a simple white background to the affected diagrams, we can ensure everyone has a clear view of the StarRocks documentation, regardless of their preferred theme. This small tweak significantly improves the user experience and accessibility of the documentation, making it easier for everyone to learn and use StarRocks effectively. Keep an eye out for these changes, and happy reading!