Questions tagged [drawtext]
340 questions
229
votes
12 answers
Android Center text on canvas
I'm trying to display a text using the code below.
The problem is that the text is not centered horizontally.
When I set the coordinates for drawText, it sets the bottom of the text at this position. I would like the text to be drawn so that the…
Sebastian
- 2,698
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109
votes
2 answers
Android Canvas.drawText
I have a view, I'm drawing with the Canvas object in the onDraw(Canvas canvas) method. My code is:
Paint paint = new…
Gaz
- 3,855
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51
votes
9 answers
How to align text vertically?
Target: Android >= 1.6 on a pure Canvas.
Suppose I want to write a function that will draw a (width, height) large red rectangle and then draw a black Hello World text inside. I want the text to be visually in the center of the rectangle. So let's…
Leszek
- 1,181
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37
votes
4 answers
Android: Canvas.drawText() text size on different screen resolutions
For my Android game I have some calls to Canvas.drawText().
For testing, I use the standard font size which seems to be working fine.
However, when I bump up the resolution to a higher density, the larger images are automatically loaded but the text…
twig
- 4,034
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31
votes
2 answers
Android canvas drawText y-position of text
I'm using a Canvas to create a Drawable with some background and some text. The drawable is used as a compound drawable inside an EditText.
The text is drawn via drawText() on the canvas, but I do have an issue with the y-position of the drawn text…
darksaga
- 2,166
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28
votes
2 answers
Python PIL bytes to Image
import PIL
from PIL import Image
from PIL import ImageDraw
from PIL import ImageFont
import urllib.request
with urllib.request.urlopen('http://pastebin.ca/raw/2311595') as in_file:
hex_data = in_file.read()
print(hex_data)
img =…
user2040602
19
votes
6 answers
FFmpeg drawtext over multiple lines
I have the code:
import subprocess , os
ffmpeg = "C:\\ffmpeg_10_6_11.exe"
inVid = "C:\\test_in.avi"
outVid = "C:\\test_out.avi"
if os.path.exists( outVid ):
os.remove( outVid )
proc = subprocess.Popen(ffmpeg + " -i " + inVid + ''' -vf…
Jay
- 3,373
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19
votes
3 answers
Android drawText including text wrapping
I am currently creating an image editor and am attempting to draw text on top of on image using canvas.drawText(). So far I have been successful in doing this but when the user enters text that is too long, the text just continues on one line out of…
Mustafa Nasser
- 251
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16
votes
9 answers
ffmpeg single quote in drawtext
I haven't been able to get ffmpeg's drawtext video filter to draw apostrophes/single quotes when they are in drawtext's "text=" parameter, even when I escape them. Double quotes work fine, and apostrophes in text loaded from a file (e.g.…
dotsam
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15
votes
3 answers
The reason behind slow performance in WPF
I'm creating a large number of texts in WPF using DrawText and then adding them to a single Canvas.
I need to redraw the screen in each MouseWheel event and I realized that the performance is a bit slow, so I measured the time the objects are…
Vahid
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12
votes
1 answer
How to draw a Spanned String with Canvas.drawText in Android
I want to draw a SpannedString to a Canvas.
SpannableString spannableString = new SpannableString("Hello World!");
ForegroundColorSpan foregroundSpan = new ForegroundColorSpan(Color.RED);
BackgroundColorSpan backgroundSpan = new…
Suragch
- 484,302
- 314
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12
votes
3 answers
center text vertically and horizontally with canvas
I'm trying to align a text in bitmap horizontally and vertically, I read several post but I can't find a solution. The bitmap is a simple image of a circle. I post my current code. More or less it works but the text is not perfectly centered, it…
greywolf82
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11
votes
2 answers
How to position StaticLayout in android?
I want to created a wrapping text ontop of google maps api. I have been able to do this with a lot of code, but have been working on a better way. My latest attempt is to use the StaticLayout class and the text is wrapping, but I do not know how…
Nick
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11
votes
2 answers
how to use DrawText() to write text in a given window whose handle is known?
I want to know how to write text on a particular window starting at a given location in the window using the Windows API.
For example if the coordinates within the window where the text is to be written are (x,y) = (40,10) then what do I need to do…
Vicky
10
votes
1 answer
Draw text on image using Qt
I want to draw text on an image. I use this code, but I do not see any text on the image.
void ImageSaver::save(const QString &path) const {
QImage image(img_);
QPainter p(&image);
p.setPen(QPen(Qt::red));
p.setFont(QFont("Times",…
neda
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