Field Detail

• TEXTURE_ID_UNSET

  public static final int TEXTURE_ID_UNSET

  Represents an unset texture ID.

  See Also:

  Constant Field Values

• glAssertionsEnabled

  public static boolean glAssertionsEnabled

  Whether to throw a GlUtil.GlException in case of an OpenGL error.

Method Detail

• isProtectedContentExtensionSupported

  public static boolean isProtectedContentExtensionSupported​(Context context)

  Returns whether creating a GL context with "EGL_EXT_protected_content" is possible. If true, the device supports a protected output path for DRM content when using GL.

• isSurfacelessContextExtensionSupported

  public static boolean isSurfacelessContextExtensionSupported()

  Returns whether creating a GL context with "EGL_KHR_surfaceless_context" is possible.

• createEglDisplay

  @RequiresApi(17)
  public static EGLDisplay createEglDisplay()

  Returns an initialized default EGLDisplay.

• createEglContext

  @RequiresApi(17)
  public static EGLContext createEglContext​(EGLDisplay eglDisplay)
                                     throws GlUtil.UnsupportedEglVersionException

  Returns a new EGLContext for the specified EGLDisplay.

  Throws:

  GlUtil.UnsupportedEglVersionException - If the device does not support EGL version 2. eglDisplay is terminated before the exception is thrown in this case.

• getEglSurface

  @RequiresApi(17)
  public static EGLSurface getEglSurface​(EGLDisplay eglDisplay,
                                         Object surface)

  Returns a new EGLSurface wrapping the specified surface.

  Parameters:

  eglDisplay - The EGLDisplay to attach the surface to.

  surface - The surface to wrap; must be a surface, surface texture or surface holder.

• checkGlError

  public static void checkGlError()

  If there is an OpenGl error, logs the error and if glAssertionsEnabled is true throws a GlUtil.GlException.

• focusSurface

  @RequiresApi(17)
  public static void focusSurface​(EGLDisplay eglDisplay,
                                  EGLContext eglContext,
                                  EGLSurface surface,
                                  int width,
                                  int height)

  Makes the specified surface the render target, using a viewport of width by height pixels.

• deleteTexture

  public static void deleteTexture​(int textureId)

  Deletes a GL texture.

  Parameters:

  textureId - The ID of the texture to delete.

• destroyEglContext

  @RequiresApi(17)
  public static void destroyEglContext​(@Nullable
                                       EGLDisplay eglDisplay,
                                       @Nullable
                                       EGLContext eglContext)

  Destroys the EGLContext identified by the provided EGLDisplay and EGLContext.

• createBuffer

  public static FloatBuffer createBuffer​(float[] data)

  Allocates a FloatBuffer with the given data.

  Parameters:

  data - Used to initialize the new buffer.

• createBuffer

  public static FloatBuffer createBuffer​(int capacity)

  Allocates a FloatBuffer.

  Parameters:

  capacity - The new buffer's capacity, in floats.

• loadAsset

  public static String loadAsset​(Context context,
                                 String assetPath)
                          throws IOException

  Loads a file from the assets folder.

  Parameters:

  context - The Context.

  assetPath - The path to the file to load, from the assets folder.

  Returns:

  The content of the file to load.

  Throws:

  IOException - If the file couldn't be read.

• createExternalTexture

  public static int createExternalTexture()

  Creates a GL_TEXTURE_EXTERNAL_OES with default configuration of GL_LINEAR filtering and GL_CLAMP_TO_EDGE wrapping.