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Alpha is lost on textured shapes.

[1 Reply]
- 13-Feb-2013 09:24 PM
- Forum: Android Processing
Hi all !

I use a texture as a sprite map (it will be a font in the end).

My code work OK in java mode but in Android mode I lose the alpha so I get some black filled part instead of tansparency.

code is like this:
1. fonte_img = loadImage("fonte3.gif"); // same with a png
...
main assignment loop (c is the char number done in a for loop):
2. fontShape[c] = createShape();
3. fontShape[c].noFill();
4. fontShape[c].noStroke();
5. fontShape[c].translate(0,0,1); // I had to add this to avoid my background masking these shapes => this is another bug (Z sorting is OK in JAVA and not in Android mode)
6. fontShape[c].texture(fonte_img);
7. fontShape[c].vertex(-1.0*char_width, -1.0*char_height, 0, src_x, src_y);
8. fontShape[c].vertex(char_width, -1.0*char_height, 0,src_x+src_w, src_y);
9. fontShape[c].vertex(char_width, char_height, 0, src_x+src_w, src_y+src_h);
10. fontShape[c].vertex(-1.0*char_width, char_height, 0,src_x,src_y+src_h);
11. fontShape[c].end(CLOSE);
Any ideas ?
Cheers !

Olivier

Performance issues

[4 Replies]
- 30-Jan-2013 11:46 AM
- Forum: Android Processing
Hi all !

I'm trying to port some oldschool demo effect to processing/android.

With the same code in java mode I reach something like 240fps but on android only ~30.

It seems the bottleneck is the "pixel fill rate", my inner loop is something like this:
2. buffer.beginDraw();
3. buffer.loadPixels();
4. for(x = 0; x < buffer.width ; x++)
5. for(y = 0; y < buffer.height ; y++)
6. {
7. buffer.pixels[x+y*buffer.width] = somevalue;
8. }
9. buffer.updatePixels();
10. buffer.endDraw();
11. }
"somevalue" is just an example, being a fixed value or reading a LUT is almost the same writing speed.
(and my actual buffer is a 320*240 image so not a big one)

Any idea to go faster ?

Cheers,

Olivier

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