1 page.title=OpenGL 2 @jd:body 3 4 <p>Android includes support for 3D hardware acceleration. This functionality is 5 accessed via the OpenGL API — specifically, the OpenGL ES API.</p> 6 7 <p>OpenGL ES is a flavor of the OpenGL specification intended for embedded 8 devices. Versions of OpenGL ES are loosely peered to versions of the primary 9 OpenGL standard. Android currently supports OpenGL ES 1.0, which corresponds 10 to OpenGL 1.3. So, if the application you have in mind is possible with OpenGL 11 1.3 on a desktop system, it should be possible on Android.</p> 12 13 <p>The specific API provided by Android is similar to the J2ME JSR239 OpenGL 14 ES API. However, it may not be identical, so watch out for deviations.</p> 15 16 <h2>Using the API</h2> 17 18 <p>Here's how to use the API at an extremely high level:</p> 19 20 <ol> 21 <li>Write a custom View subclass.</li> 22 <li>Obtain a handle to an OpenGLContext, which provides access to the OpenGL functionality.</li> 23 <li>In your View's onDraw() method, get a handle to a GL object, and use its methods to perform GL operations.</li> 24 </ol> 25 26 <p>For an example of this usage model (based on the classic GL ColorCube), 27 see 28 <a href="{@docRoot}samples/ApiDemos/src/com/example/android/apis/graphics/GLView1.html">com.android.samples.graphics.GLView1.java</a> 29 in the ApiDemos sample code project. A slightly more sophisticated version showing how to use 30 it with threads can be found in 31 <a href="{@docRoot}samples/ApiDemos/src/com/example/android/apis/graphics/GLSurfaceViewActivity.html">com.android.samples.graphics.GLSurfaceViewActivity.java</a>. 32 </p> 33 34 <p>Writing a summary of how to actually write 3D applications using OpenGL is 35 beyond the scope of this text and is left as an exercise for the reader.</p> 36 37 <h2>Links to Additional Information</h2> 38 39 <p>Information about OpenGL ES can be 40 found at <a title="http://www.khronos.org/opengles/" 41 href="http://www.khronos.org/opengles/">http://www.khronos.org/opengles/</a>.</p> 42 43 <p>Information specifically 44 about OpenGL ES 1.0 (including a detailed specification) can be found 45 at <a title="http://www.khronos.org/opengles/1_X/" 46 href="http://www.khronos.org/opengles/1_X/">http://www.khronos.org/opengles/1_X/</a>.</p> 47 48 <p>The documentation for the Android {@link javax.microedition.khronos.opengles.GL 49 OpenGL ES implementations} are also available.</p> 50 51 <p>Finally, note that though Android does include some basic support for 52 OpenGL ES 1.1, the support is <strong>not complete</strong>, and should not be relied 53 upon at this time.</p> 54
