🌹 Hi!

🌗 About me:

I'm Ali Hashemi.
A Back-end developer who is passionate about developing internal, single-purpose, security-critical REST APIs.

🥲 Tech Stack:

Go / TS
Postgres

🥵 Social Media:

🧩 haashemi
📷 haashemi
🧩 haashemi
🧩 haashemi.dev
🧩 contact@haashemi.dev

🫥 Linear Gradient | Godot shader

🫥 I was trying to implement a linear gradirnt using golang's image stdlib by myself. I succeed somehow, but the result was not what I wanted. until I found this!

🤪 I'll implement it in Go, soon.

🧊| Additional Links:
— Smoothstep
— Clamp

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🤪 I DID IT!

🫥 After hours of reading and learning about shaders and how they works, I finally figured it out to how to implement it in Go!

🫥 The performance... it generates the 1000x1500 image in ~95ms (10FPS). which is OK.

❤️| I learned a lot from such a thing. it was also pretty fun! I still have to get deeper into it, tho.

🧊 Additional Links:
— Another implementation
— Degrees to radians
— Mix Vectors
— What's Arctan?

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😼 Performance issue fixed!

🫥 That image was taking ~90ms, right? but not anymore!

🫥 After playing with goroutines, I made it 12 times faster! Now it generates it in just 7ms!

🫥 The magic behind, is just it generates multiple (2*CPU Cores) rows at the same time. Which also means in production level, it would highly depends on the host machine.

📝 Other type of image generation things, soon...

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🫥 Radial Gradient implementation

🫥 It was just a simple migration, as It was already implemented here.

😡 There are still a lot of other things to do btw. it's too early to publish it as a package.

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🫥 Introducing Painter (WIP)

🫥 A simple RGBA image drawing package for Go

👍 I wanted to complete it and then publish it, but I like development in public more.

🧊| Repository:
— https://github.com/haashemi/painter

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🫥 Added support for transparent colors!

🫥 Now, it takes care of its background and transparent overlay color! It merges them together first and then sets the pixel's color.

🧊 Repository:
— github.com/haashemi/painter

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🫥 Added RenderRect

🫥 With this method, you're able to call the renderer on a specific part of the image. in this example, we drew a linear gradient at the bottom of the image with height of (1920-1200=720)px

🧊 Repository:
— github.com/haashemi/painter

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🫥 Painter daily update

1⃣ Added FillColor
—— Renders a flat color on the image.

painter.Render(img, painter.FillColor(color.RGBA{A: 255}))

2⃣ Added Decode
—— Decodes the image with type of png, jpeg, and webp.

img, err := painter.Decode(f)

👀 Up Next: Writer

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🫥 How fonts actually work?

🫥 To implement the Writer in the right way, I should have some knowledge about them first.

🧊 So, I'll share interesting/useful things here.

— stdlib packages:
—— x/image/font
—— x/image/font/opentype
—— x/image/font/sfnt

— Docs, Articles, blogs, etc.
—— Naming table (OpenType)
—— Naming table Example
—— FreeType Glyph Conventions

🔹 This post will be edited until I start the implementation.

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