protected override void onDraw (Canvas canvas)
{
canvas.drawColor (Color.GRAY);
canvas.save ();
canvas.translate (80, 5);
drawOriginalRects (canvas, 0xFF);
canvas.restore ();
mPaint.setStyle (Paint.Style.FILL);
canvas.save ();
canvas.translate (0, 140);
drawRgn (canvas, Color.RED, "Union", Region.Op.UNION);
canvas.restore ();
canvas.save ();
canvas.translate (0, 280);
drawRgn (canvas, Color.BLUE, "Xor", Region.Op.XOR);
canvas.restore ();
canvas.save ();
canvas.translate (160, 140);
drawRgn (canvas, Color.GREEN, "Difference", Region.Op.DIFFERENCE);
canvas.restore ();
canvas.save ();
canvas.translate (160, 280);
drawRgn (canvas, Color.WHITE, "Intersect", Region.Op.INTERSECT);
canvas.restore ();
}
protected override void onDraw (Canvas canvas)
{
canvas.drawColor (Color.WHITE);
canvas.save ();
canvas.translate (10, 10);
// translate (1 point)
doDraw (canvas, new float[] { 0, 0 }, new float[] { 5, 5 });
canvas.restore ();
canvas.save ();
canvas.translate (160, 10);
// rotate/uniform-scale (2 points)
doDraw (canvas, new float[] { 32, 32, 64, 32 },
new float[] { 32, 32, 64, 48 });
canvas.restore ();
canvas.save ();
canvas.translate (10, 110);
// rotate/skew (3 points)
doDraw (canvas, new float[] { 0, 0, 64, 0, 0, 64 },
new float[] { 0, 0, 96, 0, 24, 64 });
canvas.restore ();
canvas.save ();
canvas.translate (160, 110);
// perspective (4 points)
doDraw (canvas, new float[] { 0, 0, 64, 0, 64, 64, 0, 64 },
new float[] { 0, 0, 96, 0, 64, 96, 0, 64 });
canvas.restore ();
}
protected override void onDraw (Canvas canvas)
{
canvas.drawColor (Color.WHITE);
canvas.translate (10, 10);
canvas.save ();
for (int i = 0; i < N; i++) {
setSrcR (i);
drawSrcR (canvas, i);
canvas.translate (mSrcR.width () + 15, 0);
}
canvas.restore ();
canvas.translate (0, 100);
for (int j = 0; j < sFits.Length; j++) {
canvas.save ();
for (int i = 0; i < N; i++) {
drawFit (canvas, i, sFits [j]);
canvas.translate (mDstR.width () + 8, 0);
}
canvas.drawText (sFitLabels [j], 0, HEIGHT * 2 / 3, mLabelPaint);
canvas.restore ();
canvas.translate (0, 80);
}
}
void showPath (Canvas canvas, int x, int y, Path.FillType ft, Paint paint)
{
canvas.save ();
canvas.translate (x, y);
canvas.clipRect (0, 0, 120, 120);
canvas.drawColor (Color.WHITE);
mPath.setFillType (ft);
canvas.drawPath (mPath, paint);
canvas.restore ();
}
void drawFit (Canvas canvas, int index, Matrix.ScaleToFit stf)
{
canvas.save ();
setSrcR (index);
mMatrix.setRectToRect (mSrcR, mDstR, stf);
canvas.concat (mMatrix);
drawSrcR (canvas, index);
canvas.restore ();
canvas.drawRect (mDstR, mHairPaint);
}
protected override void onDraw (Canvas canvas)
{
canvas.drawColor (unchecked((int)0xFFCCCCCC));
canvas.save ();
canvas.concat (mMatrix);
canvas.drawVertices (Canvas.VertexMode.TRIANGLE_FAN, 10, mVerts, 0,
mTexs, 0, null, 0, null, 0, 0, mPaint);
canvas.translate (0, 240);
canvas.drawVertices (Canvas.VertexMode.TRIANGLE_FAN, 10, mVerts, 0,
mTexs, 0, null, 0, mIndices, 0, 6, mPaint);
canvas.restore ();
}
protected override void onDraw (Canvas canvas)
{
canvas.drawColor (Color.WHITE);
canvas.translate (10, 10);
canvas.saveLayerAlpha (0, 0, 200, 200, 0x88, LAYER_FLAGS);
mPaint.setColor (Color.RED);
canvas.drawCircle (75, 75, 75, mPaint);
mPaint.setColor (Color.BLUE);
canvas.drawCircle (125, 125, 75, mPaint);
canvas.restore ();
}
protected override void onDraw (Canvas canvas)
{
canvas.drawColor (Color.WHITE);
mDrawable.setBounds (mRect);
float r = 16;
canvas.save ();
canvas.translate (10, 10);
mDrawable.setGradientType (GradientDrawable.LINEAR_GRADIENT);
setCornerRadii (mDrawable, r, r, 0, 0);
mDrawable.draw (canvas);
canvas.restore ();
canvas.save ();
canvas.translate (10 + mRect.width () + 10, 10);
mDrawable.setGradientType (GradientDrawable.RADIAL_GRADIENT);
setCornerRadii (mDrawable, 0, 0, r, r);
mDrawable.draw (canvas);
canvas.restore ();
canvas.translate (0, mRect.height () + 10);
canvas.save ();
canvas.translate (10, 10);
mDrawable.setGradientType (GradientDrawable.SWEEP_GRADIENT);
setCornerRadii (mDrawable, 0, r, r, 0);
mDrawable.draw (canvas);
canvas.restore ();
canvas.save ();
canvas.translate (10 + mRect.width () + 10, 10);
mDrawable.setGradientType (GradientDrawable.LINEAR_GRADIENT);
setCornerRadii (mDrawable, r, 0, 0, r);
mDrawable.draw (canvas);
canvas.restore ();
canvas.translate (0, mRect.height () + 10);
canvas.save ();
canvas.translate (10, 10);
mDrawable.setGradientType (GradientDrawable.RADIAL_GRADIENT);
setCornerRadii (mDrawable, r, 0, r, 0);
mDrawable.draw (canvas);
canvas.restore ();
canvas.save ();
canvas.translate (10 + mRect.width () + 10, 10);
mDrawable.setGradientType (GradientDrawable.SWEEP_GRADIENT);
setCornerRadii (mDrawable, 0, r, 0, r);
mDrawable.draw (canvas);
canvas.restore ();
}
protected override void onDraw (Canvas canvas)
{
canvas.drawColor (unchecked((int)0xFFDDDDDD));
canvas.save ();
Paint paint = new Paint ();
paint.setColor (Color.BLUE);
MaskFilter mf = new BlurMaskFilter (128, BlurMaskFilter.Blur.NORMAL);
paint.setMaskFilter (mf);
mf.Dispose ();
canvas.translate (200, 200);
canvas.drawCircle (100, 100, 200, paint);
canvas.restore ();
paint.Dispose ();
}
protected override void onDraw (Canvas canvas)
{
canvas.drawColor (Color.GRAY);
canvas.save ();
canvas.translate (10, 10);
drawScene (canvas);
canvas.restore ();
canvas.save ();
canvas.translate (160, 10);
canvas.clipRect (10, 10, 90, 90);
canvas.clipRect (30, 30, 70, 70, Region.Op.DIFFERENCE);
drawScene (canvas);
canvas.restore ();
canvas.save ();
canvas.translate (10, 160);
mPath.reset ();
canvas.clipPath (mPath); // makes the clip empty
mPath.addCircle (50, 50, 50, Path.Direction.CCW);
canvas.clipPath (mPath, Region.Op.REPLACE);
drawScene (canvas);
canvas.restore ();
canvas.save ();
canvas.translate (160, 160);
canvas.clipRect (0, 0, 60, 60);
canvas.clipRect (40, 40, 100, 100, Region.Op.UNION);
drawScene (canvas);
canvas.restore ();
canvas.save ();
canvas.translate (10, 310);
canvas.clipRect (0, 0, 60, 60);
canvas.clipRect (40, 40, 100, 100, Region.Op.XOR);
drawScene (canvas);
canvas.restore ();
canvas.save ();
canvas.translate (160, 310);
canvas.clipRect (0, 0, 60, 60);
canvas.clipRect (40, 40, 100, 100, Region.Op.REVERSE_DIFFERENCE);
drawScene (canvas);
canvas.restore ();
}
void doDraw (Canvas canvas, float[] src, float[] dst)
{
canvas.save ();
mMatrix.setPolyToPoly (src, 0, dst, 0, src.Length >> 1);
canvas.concat (mMatrix);
mPaint.setColor (Color.GRAY);
mPaint.setStyle (Paint.Style.STROKE);
canvas.drawRect (0, 0, 64, 64, mPaint);
canvas.drawLine (0, 0, 64, 64, mPaint);
canvas.drawLine (0, 64, 64, 0, mPaint);
mPaint.setColor (Color.RED);
mPaint.setStyle (Paint.Style.FILL);
// how to draw the text center on our square
// centering in X is easy... use alignment (and X at midpoint)
float x = 64 / 2;
// centering in Y, we need to measure ascent/descent first
float y = 64 / 2 - (mFontMetrics.ascent + mFontMetrics.descent) / 2;
canvas.drawText (src.Length / 2 + "", x, y, mPaint);
canvas.restore ();
}
protected override void onDraw (Canvas canvas)
{
canvas.drawColor (unchecked((int)0xFFDDDDDD));
test_alphagradients (canvas);
RectF r = new RectF (0, 0, 100, 100);
Paint paint = new Paint ();
paint.setDither (true);
canvas.save ();
canvas.translate (20, 100);
Shader.TileMode[] modes = {
Shader.TileMode.CLAMP, Shader.TileMode.MIRROR, Shader.TileMode.CLAMP
};
foreach (Shader.TileMode tile in modes) {
canvas.save ();
foreach (GradData data in Grads) {
canvas.save ();
foreach (GradMaker maker in GradMakers) {
using (Shader shader = maker(r, data, tile))
paint.setShader (shader);
canvas.drawRect (r, paint);
canvas.translate (0, 120);
}
canvas.restore ();
canvas.translate (120, 0);
}
canvas.translate (Grads.Length * 120, 0);
}
canvas.restore ();
canvas.translate (0, 370);
}
