Android OpenGL ES 2.0 debug helper

Android OpenGL ES 2.0 debug helper

在程式中的任何一個地方加入以下訊息

即可知道目前 OpenGL 有沒有任何 error

Log.e(TAG, "check_gl_error_and_print: " + GLES20.glGetError());

檢查 vertex shader 是否 build failed

int buf[] = new int[1];IntBuffer intBuf = IntBuffer.wrap(buf);GLES20.glGetShaderiv(vertexShader, GL_COMPILE_STATUS, intBuf);Log.e(TAG, "vertexShader GL_COMPILE_STATUS = " + intBuf.get(0));


檢查 fragment shader 是否 build failed
GLES20.glGetShaderiv(fragmentShader, GL_COMPILE_STATUS, intBuf);Log.e(TAG, "fragmentShader GL_COMPILE_STATUS = " + intBuf.get(0));


如果 build failed, intBuf.get(0)就會是 0
可以用下列的 code 取得更詳細的資訊

if(0 == intBuf.get(0))
{
    int length[] = new int[1024];    IntBuffer lengthBuf = IntBuffer.wrap(length);    GLES20.glGetShaderiv(fragmentShader, GL_INFO_LOG_LENGTH, lengthBuf);    String infoLog = GLES20.glGetShaderInfoLog(fragmentShader);    Log.e(TAG, "infoLog = " + infoLog);}