Godot: How to draw a rawarray Image

[AlexHolly]

Right now I have to save my rawarray(image) first but I want to show it without saving to the drive.

var image_as_raw_array = []#is filled with an png image from www
var path = "res://cache.png"

if(f.open( path, File.WRITE )==0):
    f.store_buffer( image_as_raw_array )
    f.close()

    var img = ImageTexture.new()
    img.load( path )

    preview_sprite.set_texture( img )

Is there a way without "img.load( path )" something like img.load( rawarray )?

http://www.godotengine.org/qa/744/how-to-draw-a-rawarray-image

[ghost]

For storing a Image in a file you can use File::store_var and File::get_var.

But if you want create a Image from RawArray now is not pratical. But there's this Image constructor:

Image(int p_width, int p_height, int p_mipmaps, Format p_format, const DVector<uint8_t>& p_data);

I can bind this constructor GDScript, but i will need increase the maximun number of arguments a constructor can have, it's easy and will not afect anything.

[AlexHolly]

Is it possible to read the width and height from the rawarray?
It works with "img.load( path )" so why not with img.load( format, rawarray )

[puppetmaster-]

In libgdx I used the Pixmap class to generate and manipulate Image/texture in game. Very fast and very cool to create procedurally generated content.

With new Texture(pixmap) you got the texture to draw.

Perhaps we could have something similarly in godot.

[ghost]

@AlexHolly, oh i'm sorry i misunderstood the question, you can transform transform a RawArray in a Image using bytes2var.

@puppetmaster- Image and ImageTexture. Exposing the additional constructor, maybe, will expand it's possibilities.

[AlexHolly]

I think bytes2var only works if the bytes where created by godot. My rawarray is a .png image from www
I try anyway.

UPDATE:
preview_sprite.set_texture( bytes2var(file_as_raw_array) )

ERROR: decode_variant: Condition ' type>=Variant::VARIANT_MAX ' is true. returned: ERR_INVALID_DATA
At: core/io/marshalls.cpp:47.
ERROR: call: Not enough bytes for decoding..
At: modules/gdscript/gd_functions.cpp:683.

I think this feature is missing...

[bojidar-bg]

bytes2var and var2bytes would (de)serialize a godot Texture, not a .png file :smile:

[AnCaPepe]

The idea of creating an Image directly from a RawArray looks very useful. At least I can see it working for my case, where I get images from a database. Currently I need to save it to a file locally and load it again as an Image.

[bojidar-bg]

Note that this works just fine for C++ (as evidenced by assetlib, even though AL would cache them).

[cefleet]

If I could open this up again.
I was able to expose the constructor to gdscript by by editing the variant_call class
I added the ("data", Variant::RAW_ARRAY):
_VariantCall::add_constructor(_VariantCall::Image_init1,Variant::IMAGE,"width",Variant::INT,"height",Variant::INT,"mipmaps",Variant::BOOL,"format",Variant::INT,"data",Variant::RAW_ARRAY);
and adding *p_args[4]:
r_ret=Image(*p_args[0],*p_args[1],*p_args[2],Image::Format(p_args[3]->operator int()),*p_args[4]);

and adding then the argument:
const String& p_name5="", const Variant::Type p_type5=Variant::NIL)
to the add_constructor function.
So now gdscript allows me to use my RawArray from udp to create the Image.

However it errors because the data is coming in as compressed jpg. I cannot find a way to decompress to rgb.

[tmathews]

Looking to utilize this as well.

[ArthurAttout]

Still not feasible under 3.0.6 ?

[bojidar-bg]

@ArthurAttout There is Image::load_{jpg,png}_from_buffer.