Andengine gles2 - weird JPG look

StackOverflow https://stackoverflow.com/questions/22963964

  •  30-06-2023
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Question

I want load backgound texture from JPG, scale it down to proper size. So I have 1920x1080 picture and I scale it to ~800x480.

BitmapTextureAtlas splashTextureAtlas = new BitmapTextureAtlas(this.getTextureManager(), 1920, 1080, TextureOptions.DEFAULT);
        splashTextureRegion = BitmapTextureAtlasTextureRegionFactory.createFromAsset(splashTextureAtlas, this, "new/splash_bg1.JPG", 0, 0);
        splashTextureAtlas.load();

Sprite splash = new Sprite(0, 0, splashTextureRegion, mEngine.getVertexBufferObjectManager());
        splash.setScale(mainScaleX);

And effect is poor.

Orginal File

enter image description here

What I see on screen

enter image description here

I try with diffrent TextureOption but without any effect. Could you suggest me what I'm doing wrong?

UPDATE

Even when I keep aspect ratio quality is poor

enter image description here

Était-ce utile?

La solution

By default, dither is disabled for performance reasons. For gradient textures that are experiencing really bad banding, try adding this to your sprite creation:

Sprite splash = new Sprite(0, 0, splashTextureRegion, mEngine.getVertexBufferObjectManager()) {

    protected void preDraw(GLState pGLState, Camera pCamera) {
        super.preDraw(pGlState, pCamera);
        pGlState.enableDither();
    }

};

Autres conseils

the problem may be in your scaling - at 1920x1080 you have an aspect ratio of 1.777 - but at 800x480, the aspect ratio is 1.667.

Try scaling the image to 800x450 or 853x480 to preserve the aspect ratio of 1.777 - if you truly need 800x480, then crop the image to those specs after you scale the size down.

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