[mono-android] Compressed texture - OES Palette8 RBGBA - white screen

[Rodrigo 'r2d2rigo' Diaz]

Depending on the target device, you can use DXT or PVRTC as your compressed
formats. ETC1 is available on Android since version 2.3, but doesn't
support alpha channel.

2012/2/28 conio <konrad at konsoft.eu>

> Hey, I am trying to display rectangle and put texture on it. The problem I
> get is white screen, even if OpenGL ES error is all the time 0 (so no
> error).
> Here is my code:
>
> public class Mesh
> {
>        float[] _Vertices;
>        short[] _Indices;
>        byte[]  _Colors;
>        float _xTrans;
>        int[]   Textures = new int[1];
>        DDSFile TextureFile;
>        bool    ShouldMakeTexture = true;
>        float[] _TextureCoordinates;
>        int TextureID = 0;
>
>        public float[] TextureCoordinates
>        {
>                get { return _TextureCoordinates; }
>                set { _TextureCoordinates = value; }
>        }
>
>        public float[] Vertices
>        {
>                get { return _Vertices; }
>                set { _Vertices = value; }
>        }
>
>        public Mesh (float[] vertices, byte[] colors, float xTranslation,
> short[]
> indices,
>                         DDSFile textureFile)
>        {
>                _Vertices = vertices;
>                _Colors = colors;
>                _xTrans = xTranslation;
>                _Indices = indices;
>                TextureFile = textureFile;
>
>        }
>
>        public void Render()
>        {
>
>                GL.FrontFace(All.Ccw);
>                GL.Enable(All.CullFace);
>                GL.CullFace(All.Back);
>                GL.EnableClientState(All.VertexArray);
>                GL.VertexPointer(3, All.Float, 0, _Vertices);
>
>                if (ShouldMakeTexture)
>                        MakeTexture();
>                int Error = (int)GL.GetError();
>
>                GL.Enable(All.Texture2D);
>                GL.EnableClientState(All.TextureCoordArray);
>                GL.TexCoordPointer(2, All.Float, 0, TextureCoordinates);
>                GL.BindTexture(All.Texture2D, Textures[0]);
>
>                GL.DrawElements(All.Triangles, _Indices.Length,
> All.UnsignedShort,
> _Indices);
>                GL.DisableClientState(All.VertexArray);
>                GL.DisableClientState(All.TextureCoordArray);
>                GL.Disable(All.CullFace);
>        }
>
>        private void MakeTexture()
>        {
>
>                GL.GenTextures(1, Textures);
>                GL.BindTexture(All.Texture2D, TextureID);
>                GL.TexParameter(All.Texture2D, All.TextureMinFilter,
> (int)All.Linear);
>                GL.TexParameter(All.Texture2D,All.TextureMagFilter,
> (int)All.Linear);
>                int[] parameters = new int[50];
>                GL.GetInteger(All.CompressedTextureFormats, parameters);
>                int Error = (int)GL.GetError();
>                GL.CompressedTexImage2D(All.Texture2D, 0,
> All.Palette8Rgba8Oes,
> TextureFile.Header.Width, TextureFile.Header.Height, 0,
> TextureFile.Data.Length, TextureFile.Data);
>                Error = (int)GL.GetError();
>                this.ShouldMakeTexture = false;
>        }
> }
>
> So, in my GLView I create a mesh, supply indices, vertices and texture
> coordinates. In OnRenderFrame I just call mesh.Render() -> it should create
> texture. Code of MakeTexture executes fine, no error reported but I get
> white screen. So, is my code wrong, or is it my .dds file which is bad? Do
> you know any good tools for making compression for OpenGL ES? I used
> photoshop with Palette8 ARGB.
> Thanks for help,
> Konrad
>
> --
> View this message in context:
> http://mono-for-android.1047100.n5.nabble.com/Compressed-texture-OES-Palette8-RBGBA-white-screen-tp5523218p5523218.html
> Sent from the Mono for Android mailing list archive at Nabble.com.
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