Refactor Shader Metadata Handling and Improve Readability.

[MAJigsaw77]

• Added FlxRuntimeShaderMacro to dynamically retrieve shader metadata values, removing the need to manually copy strings from the original classes.
• Implemented a toString function in FlxRuntimeShader for easier debugging.
• Renamed several elements within FlxRuntimeShader methods for improved clarity and readability.

[Geokureli]

@EliteMasterEric can you take a look at this?

[EliteMasterEric]

Everything looks good with this PR except for the one issue I mentioned.

[Geokureli]

Thanks!

[Geokureli]

Oh hey, @MAJigsaw77 can I get a basic example of what a simple FlxRuntimeShader extending class will look like, after this change?

[MAJigsaw77]

Oh hey, @MAJigsaw77 can I get a basic example of what a simple FlxRuntimeShader extending class will look like, after this change?

package;

import flixel.addons.display.FlxRuntimeShader;

class Chrome extends FlxRuntimeShader
{
	@:glFragmentSource('
		#pragma header

		uniform float rOffset;
		uniform float gOffset;
		uniform float bOffset;

		void main(void)
		{
			vec4 toUse = flixel_texture2D(bitmap, openfl_TextureCoordv);
			toUse.r = flixel_texture2D(bitmap, openfl_TextureCoordv.st - vec2(rOffset, 0.0)).r;
			toUse.g = flixel_texture2D(bitmap, openfl_TextureCoordv.st - vec2(gOffset, 0.0)).g;
			toUse.b = flixel_texture2D(bitmap, openfl_TextureCoordv.st - vec2(bOffset, 0.0)).b;
			gl_FragColor = toUse;
		}')
	public function new():Void
	{
		super();
	}
}

There isn't much of a difference except the fact that I'll use @:glFragmentSource from the extended class as the default values.

[MAJigsaw77]

It should work like extending FlxGraphicShader in a way.

[Geokureli]

Thanks, again!

I assume the old version would require more gl tags?

[MAJigsaw77]

Thanks, again!

I assume the old version would require more gl tags?

Before this pr, it couldn't work like extending FlxGraphicShader but now it will as shown in example.