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Postsdbo
POBug in Canvas.drawVertices? (with repro code and logcat)
 

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  1. POBug in Canvas.drawVertices? (with repro code and logcat)
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    <p>Simply paste this code into a simple skeleton Android project.</p> <pre><code>public final class DrawableView extends View { private float[] mVertices = {0, 0, 255, 0, 255, 255, 0, 255}; private float[] mTexCoords = {0, 0, 255, 0, 255, 255, 0, 255}; private short[] mIndices = {0, 2, 3, 0, 1, 2}; private int[] mColors = {Color.RED, Color.GREEN, Color.BLUE, Color.MAGENTA}; Context mContext; BitmapShader mShader; public DrawableView(Context context) { super(context); mContext = context; mShader = new BitmapShader(BitmapFactory.decodeResource(getResources(), R.drawable.icon), Shader.TileMode.CLAMP, Shader.TileMode.CLAMP); } @Override protected void onDraw(Canvas canvas) { Paint paint = new Paint(); paint.setColor(Color.RED); paint.setShader(mShader); canvas.drawVertices(Canvas.VertexMode.TRIANGLES, 8, mVertices, 0, mTexCoords, 0, mColors, 0, mIndices, 0, 6, paint); invalidate(); } } </code></pre> <p>And then set this as the main view in the onCreate of the main activity.</p> <pre><code>@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(new DrawableView(this)); } </code></pre> <p>This should make the application exit, with no error or even a "force close" dialog. Logcat gives me nothing useful (http://pastebin.com/c67NJnBz), either!</p> <p>Both the following drawVertices calls produce the desired effect, though.</p> <pre><code>canvas.drawVertices(Canvas.VertexMode.TRIANGLES, 8, mVertices, 0, mTexCoords, 0, null, 0, mIndices, 0, 6, paint); // Works! </code></pre> <p>and</p> <pre><code>paint.setColor(Color.RED); // paint.setShader(mShader); canvas.drawVertices(Canvas.VertexMode.TRIANGLES, 8, mVertices, 0, mTexCoords, 0, mColors, 0, mIndices, 0, 6, paint); // Renders wireframe </code></pre> <p>Am I doing something wrong? Please help me determine if this an Android API bug.</p>
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