Since you mention magnification, and it looks like you are using the
same mPaint object for both drawText calls, I guess you scale up the
contents of "singleUseCanvas" to achive that. That's the reason for the
roughness of text.
Make sure you render text into singleUseCanvas at magnified size, so no
further scaling is necessary (when drawing mBitmap to the screen).
Also try setting mPaint.setAntiAlias(true)
-- Kostya
25.12.2010 15:37, MichaelF ?????:
Hi,
I am drawing some text on a Canvas, and on a Bitmap, respectively:
|protected void onDraw(Canvas canvas) {
canvas.drawText("Canvas text", 10, 10, mPaint);
Canvas singleUseCanvas= new Canvas();
singleUseCanvas.setBitmap(mBitmap);
singleUseCanvas.drawText("Bitmap text", 10, 30, mPaint);
}
|
In the former case, the text renders as you would expect, while in the
latter, it appears very rough and ugly. This becomes even more
problematic when using e.g.
|canvas.drawBitmapMesh(...);
|
to apply transformations to the bitmap. Am I doing something wrong, or
is the quality simply deteriorated when you pass from Canvas to Bitmap?
On a side note, the reason why I'm drawing text on a Bitmap is to
obtain a "magnifier" effect on the text in question (like Apple OSX's
dock), since I can then apply arbitrary transformations to it using a
bitmap mesh. Is there another, perhaps better, way to do this?
Best,
Michael
(Also posted
here: http://stackoverflow.com/questions/4485587/drawing-text-on-a-bitmap-rather-than-canvas,
but with no answer)
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