LibGDX BufferedImage to Texture

Engines, Libraries and Tools
#1

Is there any way to convert a BufferedImage to a Texture?

#2

If you are using LibGDX, I have to say that I don’t recommend also using BufferedImages (from Java2D), instead you could use a Pixmap, or if you really do need BufferedImages, then I guess you could use ImageIO to save the image to a file, bring the file back in as a texture, then delete the file, but that seems quite hacky and inefficient.

#3

Try to not mix libgdx with java2d. +1 for pixmap.

#4

If you are using libgdx, you should NEVER EVER touch anything from java2d.

Have fun. :smiley:

PS:

You should be able to get a pixel array from the bufferedimage and create a libgdx texture from that. Look at how to take a bufferedimage and make it into a opengl texture. Hell, you could just use that search box with the cob webs on it.

http://www.java-gaming.org/index.php?topic=25516.0

#5

we wrote our own screenshot method which uses bufferedimages sort of:


public static void takeScreenshot(String outputfile)
{
                 ByteBuffer screenContents = ByteBuffer.allocateDirect(Display.getWidth() * Display.getHeight() * 4).order(ByteOrder.LITTLE_ENDIAN);
	      GL11.glReadPixels(0, 0, Display.getWidth(), Display.getHeight(), GL11.GL_RGB, GL11.GL_UNSIGNED_BYTE, screenContents);
	      BufferedImage img = new BufferedImage(Display.getWidth(), Display.getHeight(), BufferedImage.TYPE_INT_RGB);
	      
	      ImageUtil.putToBufferedImage(img, screenContents, false, true);
	      
	      // save the image
	      ImageUtil.saveBufferedImage(img, outputfile);
}

Because this: http://code.google.com/p/libgdx-users/wiki/Screenshots
Has some kind of color error.
some colors are wrong and stuff using that code

#6

What is wrong with PixmapIO?

The problem with BufferedImage is that it won’t work with iOS, Android, WebGL, or GLFW (maybe useful for OSX 10.7 users). It’s also generally slow.

#7

The problem is that I have to read in images from a inputstream and after a few google searches, I didn’t see a clear way to do this.

#8

Never actually tried this but I suppose you could read the bufferedimage pixel by pixel into the texture (does it use a raster or something? idk)

#9
#10

Thanks for the suggestions. I managed to fix it. I create a Gdx2DPixmap which can load from input streams, then I use that to create a pixmap, then I use the pixmap to create a texture.


Gdx2DPixmap gpm = new Gdx2DPixmap(menuBackground, Gdx2DPixmap.GDX2D_FORMAT_RGB888);
Pixmap pixmap = new Pixmap(gpm);
Texture background = new Texture(bgPixmap);
#11

I think this bug could be fixed as there are already 2 helpers in JOGL to do that:

  • com.jogamp.opengl.util.awt.Screenshot
  • com.jogamp.opengl.util.GLReadBufferUtil (AWT-free, you can use it with TextureData and TextureIO)