Artefacts on texture with alpha channel

[sdelaysam]

Hi, @longngo78

I have png image with transparency.
When using it as a texture I get the following (left is screenshot from device, right is the image itself)

Default blending and bitmap config, nothing changed anywhere.
Here is the code :)

Texture texture = getTextureManager().createDrawableTexture(R.drawable.table, null);
Sprite table = new Sprite();
table.setTexture(texture);
addChild(table);

The same drawable in ImageView looks perfect.

EDIT:
Using BlendFunc.getPremultipliedAlpha() makes everything work. But why?

[longngo78]

Yes, I believe the way Android decodes PNG (w/ alpha) image is different. To fix this, the best way is to use BlendFunc.getPremultipliedAlpha() or BlendModes.PREMULTIPLIED_ALPHA_FUNC (they are the same).

You might consider to do texture.setFilters(GL10.GL_LINEAR, GL10.GL_LINEAR) for better render.
By default it uses GL10.GL_NEAREST which renders faster but is lower quality.

On a related note, if you're building a full application, extend or modify Pure2dApplication which allows to you config stuff including textures, fonts,... from a json file: ui_config.json.