How to use

ETC1Util

in

android.opengl

Resources resources = TextureManager.getInstance().getContext().getResources();
try {
  ETC1Util.ETC1Texture texture = ETC1Util.createTexture(resources.openRawResource(mResourceId));
  mByteBuffers = new ByteBuffer[]{texture.getData()};
  setWidth(texture.getWidth());
try {
  for (int i = 0, length = mResourceIds.length; i < length; i++) {
    ETC1Util.ETC1Texture texture = ETC1Util.createTexture(resources.openRawResource(mResourceIds[i]));
    mipmapChain[i] = texture.getData();
    if (i == 0) {

  public void load(GL10 gl) {
    Log.w(TAG, "ETC1 texture support: " + ETC1Util.isETC1Supported());
    InputStream input = getResources().openRawResource(R.raw.androids);
    try {
      ETC1Util.loadTexture(GLES10.GL_TEXTURE_2D, 0, 0,
          GLES10.GL_RGB, GLES10.GL_UNSIGNED_SHORT_5_6_5, input);
    } catch (IOException e) {
      Log.w(TAG, "Could not load texture: " + e);
    } finally {
      try {
        input.close();
      } catch (IOException e) {
        // ignore exception thrown from close.
      }
    }
  }
}

public void load(GL10 gl) {
  int width = 128;
  int height = 128;
  Buffer image = createImage(width, height);
  ETC1Util.ETC1Texture etc1Texture = ETC1Util.compressTexture(image, width, height, 3, 3 * width);
  if (USE_STREAM_IO) {
    // Test the ETC1Util APIs for reading and writing compressed textures to I/O streams.
    try {
      ByteArrayOutputStream bos = new ByteArrayOutputStream();
      ETC1Util.writeTexture(etc1Texture, bos);
      ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());
      ETC1Util.loadTexture(GLES10.GL_TEXTURE_2D, 0, 0,
          GLES10.GL_RGB, GLES10.GL_UNSIGNED_SHORT_5_6_5, bis);
    } catch (IOException e) {
      Log.w(TAG, "Could not load texture: " + e);
    }
  } else {
    ETC1Util.loadTexture(GLES10.GL_TEXTURE_2D, 0, 0,
        GLES10.GL_RGB, GLES10.GL_UNSIGNED_SHORT_5_6_5, etc1Texture);
  }
}

GLES20.glActiveTexture(GLES20.GL_TEXTURE0+getTextureType());
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D,texture[0]);
ETC1Util.loadTexture(GLES20.GL_TEXTURE_2D,0,0,GLES20.GL_RGB,GLES20
  .GL_UNSIGNED_SHORT_5_6_5,t);
GLES20.glUniform1i(mHTexture,getTextureType());
ETC1Util.loadTexture(GLES20.GL_TEXTURE_2D,0,0,GLES20.GL_RGB,GLES20
  .GL_UNSIGNED_SHORT_5_6_5,tAlpha);
GLES20.glUniform1i(mGlHAlpha,1+getTextureType());
GLES20.glActiveTexture(GLES20.GL_TEXTURE0+getTextureType());
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D,texture[0]);
ETC1Util.loadTexture(GLES20.GL_TEXTURE_2D,0,0,GLES20.GL_RGB,GLES20
  .GL_UNSIGNED_SHORT_5_6_5,new ETC1Util.ETC1Texture(width,height,emptyBuffer));
GLES20.glUniform1i(mHTexture,getTextureType());
ETC1Util.loadTexture(GLES20.GL_TEXTURE_2D,0,0,GLES20.GL_RGB,GLES20
  .GL_UNSIGNED_SHORT_5_6_5,new ETC1Util.ETC1Texture(width,height,emptyBuffer));
GLES20.glUniform1i(mGlHAlpha,1+getTextureType());

  public void load(GL10 gl) {
    Log.w(TAG, "ETC1 texture support: " + ETC1Util.isETC1Supported());
    InputStream input = getResources().openRawResource(R.raw.androids);
    try {
      ETC1Util.loadTexture(GLES10.GL_TEXTURE_2D, 0, 0,
          GLES10.GL_RGB, GLES10.GL_UNSIGNED_SHORT_5_6_5, input);
    } catch (IOException e) {
      Log.w(TAG, "Could not load texture: " + e);
    } finally {
      try {
        input.close();
      } catch (IOException e) {
        // ignore exception thrown from close.
      }
    }
  }
}

public void load(GL10 gl) {
  int width = 128;
  int height = 128;
  Buffer image = createImage(width, height);
  ETC1Util.ETC1Texture etc1Texture = ETC1Util.compressTexture(image, width, height, 3, 3 * width);
  if (USE_STREAM_IO) {
    // Test the ETC1Util APIs for reading and writing compressed textures to I/O streams.
    try {
      ByteArrayOutputStream bos = new ByteArrayOutputStream();
      ETC1Util.writeTexture(etc1Texture, bos);
      ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());
      ETC1Util.loadTexture(GLES10.GL_TEXTURE_2D, 0, 0,
          GLES10.GL_RGB, GLES10.GL_UNSIGNED_SHORT_5_6_5, bis);
    } catch (IOException e) {
      Log.w(TAG, "Could not load texture: " + e);
    }
  } else {
    ETC1Util.loadTexture(GLES10.GL_TEXTURE_2D, 0, 0,
        GLES10.GL_RGB, GLES10.GL_UNSIGNED_SHORT_5_6_5, etc1Texture);
  }
}

GLES20.glActiveTexture(GLES20.GL_TEXTURE0+getTextureType());
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D,texture[0]);
ETC1Util.loadTexture(GLES20.GL_TEXTURE_2D,0,0,GLES20.GL_RGB,GLES20
    .GL_UNSIGNED_SHORT_5_6_5,t);
GLES20.glUniform1i(mHTexture,getTextureType());
ETC1Util.loadTexture(GLES20.GL_TEXTURE_2D,0,0,GLES20.GL_RGB,GLES20
    .GL_UNSIGNED_SHORT_5_6_5,tAlpha);
GLES20.glUniform1i(mGlHAlpha,1+getTextureType());
GLES20.glActiveTexture(GLES20.GL_TEXTURE0+getTextureType());
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D,texture[0]);
ETC1Util.loadTexture(GLES20.GL_TEXTURE_2D,0,0,GLES20.GL_RGB,GLES20
    .GL_UNSIGNED_SHORT_5_6_5,new ETC1Util.ETC1Texture(width,height,emptyBuffer));
GLES20.glUniform1i(mHTexture,getTextureType());
ETC1Util.loadTexture(GLES20.GL_TEXTURE_2D,0,0,GLES20.GL_RGB,GLES20
    .GL_UNSIGNED_SHORT_5_6_5,new ETC1Util.ETC1Texture(width,height,emptyBuffer));
GLES20.glUniform1i(mGlHAlpha,1+getTextureType());

public static int loadECTTexture(Context context, int resourceId) {
  final int[] textureObjectIds = new int[1];
  glGenTextures(1, textureObjectIds, 0);
  if (textureObjectIds[0] == 0) {
    Timber.d("Could not generate a new OpenGL texture object.");
    return 0;
  }
  // 设置缩小的情况下过滤方式
  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
  // 设置放大的情况下过滤方式
  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
  InputStream is = context.getResources().openRawResource(resourceId);
  try {
    ETC1Util.loadTexture(GLES20.GL_TEXTURE_2D, 0, 0, GLES20.GL_RGB, GLES20.GL_UNSIGNED_BYTE, is);
  } catch (Exception e) {
    Timber.e(e.getMessage(), e);
  } finally {
    try {
      is.close();
    } catch (IOException e) {
      e.printStackTrace();
    }
  }
  return textureObjectIds[0];
}

  public void setInputStream(InputStream compressedTexture, Bitmap fallbackTexture) {
    ETC1Util.ETC1Texture texture = null;

    try {
      texture = ETC1Util.createTexture(compressedTexture);
    } catch (IOException e) {
      RajLog.e("addEtc1Texture: " + e.getMessage());
    } finally {
      if (texture == null) {
        setBitmap(fallbackTexture);

        if (RajLog.isDebugEnabled())
          RajLog.d("Falling back to uncompressed texture");
      } else {
        setByteBuffer(texture.getData());
        setWidth(texture.getWidth());
        setHeight(texture.getHeight());

        if (RajLog.isDebugEnabled())
          RajLog.d("ETC1 texture load successful");
      }
    }
  }
}

public void setResourceId(int resourceId) {
  mResourceId = resourceId;
  Resources resources = TextureManager.getInstance().getContext().getResources();
  try {
    ETC1Util.ETC1Texture texture = ETC1Util.createTexture(resources.openRawResource(resourceId));
    mByteBuffers = new ByteBuffer[]{texture.getData()};
    setWidth(texture.getWidth());
    setHeight(texture.getHeight());
    setCompressionFormat(ETC1.ETC1_RGB8_OES);
  } catch (IOException e) {
    RajLog.e(e.getMessage());
    e.printStackTrace();
  }
}

public void setResourceIds(int[] resourceIds) {
  ByteBuffer[] mipmapChain = new ByteBuffer[resourceIds.length];
  Resources resources = TextureManager.getInstance().getContext().getResources();
  int mip_0_width = 1, mip_0_height = 1;
  try {
    for (int i = 0, length = resourceIds.length; i < length; i++) {
      ETC1Util.ETC1Texture texture = ETC1Util.createTexture(resources.openRawResource(resourceIds[i]));
      mipmapChain[i] = texture.getData();
      if (i == 0) {
        mip_0_width = texture.getWidth();
        mip_0_height = texture.getHeight();
      }
    }
    setWidth(mip_0_width);
    setHeight(mip_0_height);
    setCompressionFormat(ETC1.ETC1_RGB8_OES);
  } catch (IOException e) {
    RajLog.e(e.getMessage());
    e.printStackTrace();
  }
  mByteBuffers = mipmapChain;
}

  public void setInputStream(InputStream compressedTexture, Bitmap fallbackTexture) {
    ETC1Util.ETC1Texture texture = null;

    try {
      texture = ETC1Util.createTexture(compressedTexture);
    } catch (IOException e) {
      RajLog.e("addEtc1Texture: " + e.getMessage());
    } finally {
      if (texture == null) {
        setBitmap(fallbackTexture);

        if (RajLog.isDebugEnabled())
          RajLog.d("Falling back to uncompressed texture");
      } else {
        setByteBuffer(texture.getData());
        setWidth(texture.getWidth());
        setHeight(texture.getHeight());

        if (RajLog.isDebugEnabled())
          RajLog.d("ETC1 texture load successful");
      }
    }
  }
}