Texture compression

Is texture compression supported in jogl?

If yes, which kind of compression? Is there any example out there?

Hi

Yes it's supported, look at how it is used in the JOGL renderers, for example in JMonkeyEngine 3 and Ardor3d.

gouessej wrote

Hi

Yes it's supported, look at how it is used in the JOGL renderers, for example in JMonkeyEngine 3 and Ardor3d.

Where, here?

http://code.google.com/p/jmonkeyengine/source/browse/#svn%2Ftrunk%2Fengine%2Fsrc%2Fjogl%2Fcom%2Fjme3%2Frenderer%2Fjogl

elect wrote

gouessej wrote

Hi

Yes it's supported, look at how it is used in the JOGL renderers, for example in JMonkeyEngine 3 and Ardor3d.

Where, here?

http://code.google.com/p/jmonkeyengine/source/browse/#svn%2Ftrunk%2Fengine%2Fsrc%2Fjogl%2Fcom%2Fjme3%2Frenderer%2Fjogl

jMonekyEngine recently moved to GitHub so for the latest source look here:
https://github.com/jMonkeyEngine/jmonkeyengine/tree/master/jme3-jogl/src/main/java/com/jme3/renderer/jogl

Yes jmaasing is right. Look at the class TextureUtil. I fixed a bug in this class in August 2013.

How can I convert an image to dds format? is there any utility in jogl?

Look at com.jogamp.opengl.util.texture.spi.DDSImage.

gouessej wrote

Look at com.jogamp.opengl.util.texture.spi.DDSImage.

Thanks, you meant this one

 createFromData

public static DDSImage createFromData(int d3dFormat,
                                      int width,
                                      int height,
                                      ByteBuffer[] mipmapData)
                               throws IllegalArgumentException

    Creates a new DDSImage from data supplied by the user. The resulting DDSImage can be written to disk using the write() method.

    Parameters:
        d3dFormat - the D3DFMT_ constant describing the data; it is assumed that it is packed tightly
        width - the width in pixels of the topmost mipmap image
        height - the height in pixels of the topmost mipmap image
        mipmapData - the data for each mipmap level of the resulting DDSImage; either only one mipmap level should be specified, or they all must be
    Returns:
        DDS image object
    Throws:
        IllegalArgumentException - if the data does not match the specified arguments


Ps: how can I do if I only have an image? Because with that method I also have to submit the mimaps, which I don't have..

elect wrote

        mipmapData - the data for each mipmap level of the resulting DDSImage; either only one mipmap level should be specified, or they all must be
Ps: how can I do if I only have an image? Because with that method I also have to submit the mimaps, which I don't have..

Then you have only 1 level of mipmap.

I see jogl has only

GL_COMPRESSED_RGB_S3TC_DXT1
GL_COMPRESSED_RGBA_S3TC_DXT1
GL_COMPRESSED_RGB_S3TC_DXT3
GL_COMPRESSED_RGB_S3TC_DXT5

but it misses the counterparts for the sRGB space:

GL_COMPRESSED_SRGB_S3TC_DXT1
GL_COMPRESSED_SRGBA_S3TC_DXT1
GL_COMPRESSED_SRGB_S3TC_DXT3
GL_COMPRESSED_SRGB_S3TC_DXT5

Why?

GL_COMPRESSED_SRGB_S3TC_DXT1 _EXT was in JOGL 1 but I don't know why it isn't in JOGL 2.

Sven, do you know why??

Digging the web, I didnt find anything clear, but some hints

https://www.opengl.org/wiki/Image_Format

http://stackoverflow.com/questions/12358863/opengl-compressed-textures-and-extensions

seem to point out the sRGB versions are somehow connected/implicit with the EXT_texture_sRGB extension

But I still need to figure it out how

Found!

  public static final int GL_COMPRESSED_SRGB_S3TC_DXT1_NV = 0x8C4C;
  /** Part of <code>GL_NV_sRGB_formats</code> */
  public static final int GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_NV = 0x8C4D;
  /** Part of <code>GL_NV_sRGB_formats</code> */
  public static final int GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_NV = 0x8C4E;
  /** Part of <code>GL_NV_sRGB_formats</code> */
  public static final int GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_NV = 0x8C4F;

in GLES2

Is it possible to create a compressed texture with mipmaps using the jogl classes starting from a single image?

The problem is, to create a DDSImage a need the byteBuffer[] array containing the mipmaps

I can get that from the textureData, but textureData *dont* really create the mipmaps

            textureData = TextureIO.newTextureData(gl3.getGLProfile(), file, true, TextureIO.PNG);
           
            System.out.println("textureData.getMipmap() "+textureData.getMipmap());
            System.out.println("textureData.getMipmapData().length "+textureData.getMipmapData().length);


This prints true and then crashes because textureData.getMipmapData().length is null

and if I look in the code, I reach the

    public TextureData newTextureData(GLProfile glp, File file,
                                      int internalFormat,
                                      int pixelFormat,
                                      boolean mipmap,
                                      String fileSuffix) throws IOException;

in the TextureProvider, but it has only methods in DDS/IIO/StreamBased TextureProvider, no PNG

How can I get internalFormat, format and type from a DDS?

I tried both with TextureIO and AWTextureIO

TextureIO.newTextureData(gl3.getGLProfile(), conn.getURL(),
                    ddsImage.getNumMipMaps() > 1, TextureIO.DDS);

but I keep getting

Unsupported DDS compression format "DX10"

I read in the DDSImage.java:

"/** Simple class describing images and data; does not encapsulate
        image format information. User is responsible for transmitting
        that information in another way. */"

I wish the dds loader encapsulates the format as well.. which is the reason why it has not be included?

I'm also thinking about including support for ktx textures, is someone interested?

https://www.khronos.org/opengles/sdk/tools/KTX/

Why not? :)