public Clipping (Context context)
: base (context)
{
mPaint = new Paint ();
mPaint.setAntiAlias (true);
mPaint.setStrokeWidth (6);
mPaint.setTextSize (16);
mPaint.setTextAlign (Paint.Align.RIGHT);
mPath = new Path ();
}
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 ColorFilters (Context context)
: base (context)
{
mDrawable = getResources ().getDrawable (R.drawable.btn_default_normal);
mDrawable.setBounds (0, 0, 150, 48);
mDrawable.setDither (true);
int[] resIDs = new int[] {
R.drawable.btn_circle_normal,
R.drawable.btn_check_off,
R.drawable.btn_check_on
};
mDrawables = new Drawable[resIDs.Length];
Drawable prev = mDrawable;
for (int i = 0; i < resIDs.Length; i++) {
mDrawables [i] = getResources ().getDrawable (resIDs [i]);
mDrawables [i].setDither (true);
addToTheRight (mDrawables [i], prev);
prev = mDrawables [i];
}
mPaint = new Paint ();
mPaint.setAntiAlias (true);
mPaint.setTextSize (16);
mPaint.setTextAlign (Paint.Align.CENTER);
mPaint2 = new Paint (mPaint);
mPaint2.setAlpha (64);
Paint.FontMetrics fm = mPaint.getFontMetrics ();
mPaintTextOffset = (fm.descent + fm.ascent) * 0.5f;
mColors = new uint[] {
0, 0xCC0000FF, 0x880000FF, 0x440000FF, 0xFFCCCCFF,
0xFF8888FF, 0xFF4444FF
};
mModes = new PorterDuff.Mode[] {
PorterDuff.Mode.SRC_ATOP, PorterDuff.Mode.MULTIPLY,
};
mModeIndex = 0;
updateTitle ();
}
protected override void onDraw (Canvas canvas)
{
canvas.drawColor (Color.WHITE);
Paint labelP = new Paint (Paint.ANTI_ALIAS_FLAG);
labelP.setTextAlign (Paint.Align.CENTER);
Paint paint = new Paint ();
paint.setFilterBitmap (false);
canvas.translate (15, 35);
int x = 0;
int y = 0;
for (int i = 0; i < sModes.Length; i++) {
// draw the border
paint.setStyle (Paint.Style.STROKE);
paint.setShader (null);
canvas.drawRect (x - 0.5f, y - 0.5f,
x + W + 0.5f, y + H + 0.5f, paint);
// draw the checker-board pattern
paint.setStyle (Paint.Style.FILL);
paint.setShader (mBG);
canvas.drawRect (x, y, x + W, y + H, paint);
// draw the src/dst example into our offscreen bitmap
int sc = canvas.saveLayer (x, y, x + W, y + H, null,
Canvas.MATRIX_SAVE_FLAG |
Canvas.CLIP_SAVE_FLAG |
Canvas.HAS_ALPHA_LAYER_SAVE_FLAG |
Canvas.FULL_COLOR_LAYER_SAVE_FLAG |
Canvas.CLIP_TO_LAYER_SAVE_FLAG);
canvas.translate (x, y);
canvas.drawBitmap (mDstB, 0, 0, paint);
paint.setXfermode (sModes [i]);
canvas.drawBitmap (mSrcB, 0, 0, paint);
paint.setXfermode (null);
canvas.restoreToCount (sc);
// draw the label
canvas.drawText (sLabels [i],
x + W / 2, y - labelP.getTextSize () / 2, labelP);
x += W + 10;
// wrap around when we've drawn enough for one row
if ((i % ROW_MAX) == ROW_MAX - 1) {
x = 0;
y += H + 30;
}
}
}
