public AlphaBitmap (Context context)
: base (context)
{
mBitmap = GetResourceBitmap (R.drawable.app_sample_code);
mBitmap2 = mBitmap.extractAlpha ();
mBitmap3 = Bitmap.createBitmap (200, 200, Bitmap.Config.ALPHA_8);
drawIntoBitmap (mBitmap3);
mShader = new LinearGradient (0, 0, 100, 70, new int[] {
Color.RED, Color.GREEN, Color.BLUE },
null, Shader.TileMode.MIRROR);
}
static void drawIntoBitmap (Bitmap bm)
{
float x = bm.getWidth ();
float y = bm.getHeight ();
Canvas c = new Canvas (bm);
Paint p = new Paint ();
p.setAntiAlias (true);
p.setAlpha (0x80);
c.drawCircle (x / 2, y / 2, x / 2, p);
p.setAlpha (0x30);
p.setXfermode (new PorterDuffXfermode (PorterDuff.Mode.SRC));
p.setTextSize (60);
p.setTextAlign (Paint.Align.CENTER);
Paint.FontMetrics fm = p.getFontMetrics ();
c.drawText ("Alpha", x / 2, (y - fm.ascent) / 2, p);
}
public Xfermodes (Context context)
: base (context)
{
mSrcB = makeSrc (W, H);
mDstB = makeDst (W, H);
// make a ckeckerboard pattern
int[] colors = new int[] {
unchecked((int)0xFFFFFFFF), unchecked((int)0xFFCCCCCC),
unchecked((int)0xFFCCCCCC), unchecked((int)0xFFFFFFFF)
};
Bitmap bm = Bitmap.createBitmap (colors, 2, 2, Bitmap.Config.RGB_565);
mBG = new BitmapShader (bm,
Shader.TileMode.REPEAT,
Shader.TileMode.REPEAT);
Matrix m = new Matrix ();
m.setScale (6, 6);
mBG.setLocalMatrix (m);
}
public BitmapMesh (Context context)
: base (context)
{
mBitmap = GetResourceBitmap (R.drawable.beach);
float w = mBitmap.getWidth ();
float h = mBitmap.getHeight ();
// construct our mesh
int index = 0;
for (int y = 0; y <= HEIGHT; y++) {
float fy = h * y / HEIGHT;
for (int x = 0; x <= WIDTH; x++) {
float fx = w * x / WIDTH;
setXY (mVerts, index, fx, fy);
setXY (mOrig, index, fx, fy);
index += 1;
}
}
mMatrix.setTranslate (10, 10);
mMatrix.invert (mInverse);
}
public ColorMatrixSample (Context context)
: base (context)
{
mBitmap = GetResourceBitmap (R.drawable.balloons);
}
public static Bitmap createScaledBitmap(Bitmap src, int dstWidth, int dstHeight,
bool filter)
{
return default(Bitmap);
}
