On Friday, 15 March 2013 at 7:51 PM, andrea antonello wrote:
> Hi Jody,
> funky stuff you found out :)
>
> Were you able to do a test on this to understand how much we would gain?
>
> Nice,
> Andrea
>
>
>
For the record I did eventually figure it out:
BufferedImage image = new BufferedImage(w, h,
BufferedImage.TYPE_4BYTE_ABGR);
Graphics g = image.getGraphics();
// draw draw draw
// And then convert
if (image.getType() == BufferedImage.TYPE_4BYTE_ABGR) {
int width = image.getWidth();
int height = image.getHeight();
int bands =
image.getColorModel().getColorSpace().getNumComponents() + 1;
int depth = 32;
// Use the pixel data straight up!
byte[] pixels = ((DataBufferByte)
image.getRaster().getDataBuffer()).getData();
PaletteData paletteData = new PaletteData(0x0000ff, 0x00ff00,
0xff0000);
ImageData data = new ImageData(width, height, depth, paletteData,
width * bands, pixels);
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
int pixel = image.getRGB(x, y);
int alpha_value = (pixel >> 24) & 0x000000FF;
data.setAlpha(x, y, alpha_value );
}
}
return data;
}
As for what we will gain, one less "copy" of the byte[] representing the raster
data. I was hoping not to have a copy occur at all but do not see a way to
safely make that happen.
Jody
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