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问题 I'm trying to position a transparent PNG over a SWF movie through CSS (absolute positioning). But when I position the PNG directly over the SWF, all click actions on the SWF seem to be disabled. The SWF is asking to use your webcam, but you can't click any of the buttons. Check this link for an example. You can find the CSS here and the png here. It's like the PNG acts as a overlaying plane you can't click through. I've tried some transparent properties in both the CSS and SWF, but nothing

问题 I have tried many different libraries, but none came. None of them can not be specified without introducing his own style in Painter. I need to be able to quickly and dynamically change the style tab. In response, I showed my developments. If someone has similar developments - write them in response. 回答1: I decided to upgrade the simplest of them: TJvTabBar of JVCL (latest revision: 13415) Here is the result. Before (default) After Style sources (All graphics imported from png files with

问题 I have following code QString filePath("x.pdf"); QPrinter printer(QPrinter::HighResolution); printer.setCreator(PRODUCT_NAME); printer.setOutputFileName(filePath; printer.setOutputFormat(QPrinter::PdfFormat); QPainter painter(&printer); render(&painter); how can I save this above PDF file x.pdf into a png file using QT code? 回答1: Qt has no built-in methods that allow to convert PDF files to images. You should use some other libraries or call from your program some external converter. Maybe

问题 I had this weird problem of identical PNG images created with drf-extra-fields 's Base64ImageField with different file names not being loaded. Problem persists both in Django development server and nginx serving the image files so I don't think it is specific to Django or nginx. I experimented with different file names and some work and some don't: 0-ad0.png # Doesn't work a-ad0.png # Doesn't work aaaaaa-ad0.png # Doesn't work 0-ae0.png # Works 0-bd0.png # Works 0-ada.png # Works a-ad.png #

问题 I have a PNG image with some pixels having an alpha of 254. These pixels have this color : RGBA{183, 221, 129, 254} (not a javascript notation). I can check in Gimp that the R, G and B components are 183, 221 and 129. But when I read my pixels in Chrome using getImageData (on a canvas) the R, G and B values are modified to 182, 220 and 128 (A being correctly 254). Is that a standardized transformation or a bug ? If that's normal, where can I find the exact formula to predict RGB values given

问题 Im downloading lots of .gif files from a server and when I try to draw on them in a canvas it never works. Ive created the bitmaps from the gifs and have set them to be immutable using the Options class and have tried just creating a new file and saving the image as a png but that doesnt seem to work either. Does somebody happen to have a good simple way to convert a gif to a png? So far Ive tried: Bitmap b = BitmapFactory.decodeFile(mediaStorageDir.getAbsolutePath() + "/" + cr.getString(cr

问题 With phantomjs you can choose the file format to use for page.render(). I'm finding that the file size I'm getting for png is around three times higher than what I'm getting for gif. I wasn't aware that png should be any worse (in terms of file size) than gif; in fact I thought png was meant to be better. Unfortunately, I kinda need to output to png because of its support for variable opacity, but the larger file size is a bit of an issue. So, is there any way in which I can control file size

问题 I am new to OpenCV so please bear with me if my qustion seems silly to you. I have a set of images who all have a transparent border on the left and right like you can see below: I want to erase these borders so I thought about edge detection which would be easy to do if I could transform these transparent borders to a white color. In the Docs I found that you can do this: img = cv2.imread("./Green/image-000.png", 1) cv2.imwrite('../image-000.png', img) This erases the alpha channel of the

问题 android version upgrade to 5.x, I got a png image through screenshot. when I use imagemagick to resize it, I got an error like this identify: Extra compressed data. `a.png' @ warning/png.c/MagickPNGWarningHandler/1777. identify: Extra compression data. `a.png' @ warning/png.c/MagickPNGWarningHandler/1777. convert: Extra compressed data. `a.png' @ warning/png.c/MagickPNGWarningHandler/1777. convert: Extra compression data. `a.png' @ warning/png.c/MagickPNGWarningHandler/1777. use pngcheck info

问题 Do you know how to show the character '@' in the title when using gnuplot and the output format is PNG image? Thanks, 回答1: Which version of gnuplot are you using? Using gnuplot 4.4.3 with the following script: #!/usr/bin/gnuplot set term png set output 'plot@.png' set xlabel 'xlabel is @' set ylabel 'ylabel is @' set title "title is @a\'\@\'a\@" plot x t 'line title is @' gives me this image: Even playing with escape sequence characters doesn't seem to pose a problem, and the file created has