BGRABitmap tutorial

[circular]

Hello people.

I've started a tutorial for BGRABitmap. It's a graphical library for Lazarus, that is used in LazPaint.

It shows how to load and stretch images, use direct pixel access, combine layers, fill with gradients, use line styles and splines, generate textures with Perlin noise and render lighting with Phong shading.

Each tutorial is accompanied by screenshots.

http://wiki.lazarus.freepascal.org/BGRABitmap_tutorial

[code_glitch]

Not a lazarus user myself, but nice stuff nonetheless...

[chronozphere]

Interesting! It offers a lot more than the delphi VCL does, out of the box. (allthough delphi has it's own set of graphics libraries).

I wonder how fast the library is. Has anyone ever done a stresstest?

[WILL]

Those are some pretty cool tutorials. I'm curious though, would these uses of the Bitmap object using the OS' GUI not be rather slow even on Windows Vista/7 or Mac OS X?

[circular]

Interesting! It offers a lot more than the delphi VCL does, out of the box. (allthough delphi has it's own set of graphics libraries).

I wonder how fast the library is. Has anyone ever done a stresstest?

Well it depends. Some code could be optimized. It's all in Pascal, no assembler here.

Those are some pretty cool tutorials. I'm curious though, would these uses of the Bitmap object using the OS' GUI not be rather slow even on Windows Vista/7 or Mac OS X?

The point of BGRABitmap is to use TBitmap only when necessary. It uses a DIB section if possible, so it is kind of direct drawing. Specific code for a platform can be added to have DIB sections. It's already done for Windows and on GTK.

[WILL]

Well your last 2 tutorials go into 3D stuff, so I was just wondering how practical all that would be if you decided to do some animation for visual effect. Is it worth it to try this for a nicer looking application GUI or would we just be better off using OpenGL or Direct3D instead?