d2a4e69f3d
docs: restructure graphics docs and add hw-acceleration docs change-Id: I0f6288d1aa5430794ac672324c3e0fc7b714455d Change-Id: Ic8406a836bde5395c1bdb9aa5c50027c7c59195f
52 lines
2.7 KiB
Plaintext
52 lines
2.7 KiB
Plaintext
page.title=Graphics
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@jd:body
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<div id="qv-wrapper">
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<div id="qv">
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<h2>Topics</h2>
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<ol>
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<li><a href="{@docRoot}guide/topics/graphics/canvas.html">Canvas and Drawables</a></li>
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<li><a href="{@docRoot}guide/topics/graphics/hardware-accel.html">Hardware Acceleration</a></li>
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<li><a href="{@docRoot}guide/topics/graphics/opengl.html">OpenGL</a></li>
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</ol>
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</div>
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</div>
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<p>When writing an application, it's important to consider exactly what your graphical demands will be.
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Varying graphical tasks are best accomplished with varying techniques. For example, graphics and animations
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for a rather static application should be implemented much differently than graphics and animations
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for an interactive game. Here, we'll discuss a few of the options you have for drawing graphics
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on Android and which tasks they're best suited for.
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</p>
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<dl>
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<dt><strong><a href="{@docRoot}guide/topics/graphics/2d-graphics.html">Canvas and
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Drawables</a></strong></dt>
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<dd>Android provides a set of {@link android.view.View} widgets that provide general functionality
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for a wide array of user interfaces. You can also extend these widgets to modify the way they
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look or behave. In addition, you can do your own custom 2D rendering using the various drawing
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methods contained in the {@link android.graphics.Canvas} class or create {@link
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android.graphics.drawable.Drawable} objects for things such as textured buttons or frame-by-frame
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animations.</dd>
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<dt><strong><a href="{@docRoot}guide/topics/graphics/hardware-accel.html">Hardware
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Acceleration</a></strong></dt>
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<dd>Beginning in Android 3.0, you can hardware accelerate the majority of
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the drawing done by the Canvas APIs to further increase their performance.</dd>
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<dt><strong><a href="{@docRoot}guide/topics/graphics/opengl.html">OpenGL</a></strong></dt>
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<dd>Android supports OpenGL ES 1.0 and 2.0, with Android framework APIs as well as natively
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with the Native Development Kit (NDK). Using the framework APIs is desireable when you want to add a
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few graphical enhancements to your application that are not supported with the Canvas APIs, or if
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you desire platform independence and don't demand high performance. There is a performance hit in
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using the framework APIs compared to the NDK, so for many graphic intensive applications such as
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games, using the NDK is beneficial (It is important to note though that you can still get adequate
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performance using the framework APIs. For example, the Google Body app is developed entirely
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using the framework APIs). OpenGL with the NDK is also useful if you have a lot of native
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code that you want to port over to Android. For more information about using the NDK, read the
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docs in the <code>docs/</code> directory of the <a href="{@docRoot}sdk/ndk/index.html">NDK
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download.</a></dd>
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</dl>
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