使用具有ETC1纹理的mipmapps

我修改了我的代码以使用ETC1纹理来帮助降低内存使用量，同时纹理加载时，它不再自动生成mipmap。 ETC1图像不支持吗？我的继承人代码：使用具有ETC1纹理的mipmapps

//Generate three texture pointers... 
    gl.glGenTextures(3, textures, 0); 
    //...and bind it to our array 
    gl.glBindTexture(GL10.GL_TEXTURE_2D, textures[0]); 
    //Create Nearest Filtered Texture 
    gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_NEAREST); 
//  gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_LINEAR_MIPMAP_NEAREST); //problem child 
    gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR); 
    //gl.glTexParameterf(GL11.GL_TEXTURE_2D, GL11.GL_GENERATE_MIPMAP, GL11.GL_TRUE); problem child. 
     gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, GL10.GL_CLAMP_TO_EDGE); 
     gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, GL10.GL_CLAMP_TO_EDGE); 

    //Get the texture from the Android resource directory 
    Log.e("Sys", "ETC1 texture support: " + ETC1Util.isETC1Supported()); 
    InputStream input = context.getResources().openRawResource(R.drawable.testtile); 
    try { 
     ETC1Util.loadTexture(GLES10.GL_TEXTURE_2D, 0, 0, 
       GLES10.GL_RGB, GLES10.GL_UNSIGNED_SHORT_5_6_5, input); 
     Log.w("sys", "loaded!"); 

    } catch (IOException e) { 
     Log.w("sys", "Could not load texture: " + e); 
    } finally { 
     try { 
      input.close(); 
     } catch (IOException e) { 
      // ignore exception thrown from close. 
     } 
     }

来源

2011-09-23 jfisk