libpng

问题 I am trying to compile libpng for Windows Mobile 6, but i kep getting the following linker errors: error LNK2019: unresolved external symbol __imp___iob_func referenced in function png_default_error libpng.lib error LNK2019: unresolved external symbol __imp_abort referenced in function png_longjmp Compilation is done with /MD option, same between my main project. zlib and libpng. When /MT is used instead, there are still errors, but slightly different: error LNK2019: unresolved external

问题 Basically I would like to convert a bitmap to a png using libpng but rather than outputting it to a FILE* I would like to output it to a char*. I have already seen this related post but I don't see where the bitmap data is actually used. Any help would be appreciated. 回答1: Use the png_set_write_fn function to redirect writes to your own function; this function, which you need to write, can store the output in any way you want. See the documentation at http://www.libpng.org/pub/png/libpng

问题 In my application I am reading .png images and doing some processing. The output with OpenCV 2.4.9 and OpenCV 3.0.0 (both for windows) are not bit exact. What may be the potential error. Is there any difference in libpng in both the versions which is causing the problem. Also is there any possibility that the libs (e.g. libpng) or the version of libs is different in same version (say 2.4.9 or 3.0.0) of OpenCV for windows and OpenCV for Android. 回答1: Is there any difference in libpng in both

问题 I have a problem on my mac when trying in R to produce png images. I am getting this warnings: libpng warning: Application built with libpng-1.2.26 but running with 1.5.2 I am running the R 2.14 version using the R-studio GUI. I am not excatly sure about the libpng problem. When I am doing locate libpng-config I'm getting several hits, some with libong-config12, some with libpng-config14, some without nay numbers: ayeroslaviz:~ ayeroslaviz$ locate libpng-config /Applications/XAMPP/xamppfiles

问题 Today all my games and my friends games received new alert from Google Play: Your app is using a version of libpng containing a security vulnerability. Please see this Google Help Center article for details, including the deadline for fixing the vulnerability. How I can fix it? 回答1: If you are using libpng directly — meaning that you added it yourself to your project — then use a newer one. If not, then some other library or framework that you added to your project is using libpng . Find out

问题 I have submitted my release apk to the Google Play console, however it was rejected due to a libpng security vulnerability. I have a couple of libraries I use in my app. How do I know which of these uses libpng? I am using Android studio. I am not using OpenCV as a library! These are my dependencies in my build.gradle file: dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) testCompile 'junit:junit:4.12' compile 'com.android.support:appcompat-v7:23.4.0' compile 'com.android

问题 I am getting an error when running php : $ php -v dyld: Library not loaded: /usr/local/lib/libpng.3.dylib Referenced from: /usr/local/bin/php Reason: image not found Trace/BPT trap: 5 I read this dyld: Library not loaded: /usr/local/lib/libpng16.16.dylib with anything php related but I'm not sure if PHP was installed with brew as this command brew reinstall php55 (or anything else like brew reinstall php , brew reinstall php56 ) does not work. The next answer suggests symlinking this missing

问题 i made an iphone app and build it with 5.0. on 5.0.1 it works fine. when i try to open the app on 5.1 or 5.1.1 the app crashes instantly. in the log there are the following entries: ImageIO: CGImageRead_mapData 'open' failed '/Applications/myApp.app/Icon.png' error = 2 (No such file or directory) libpng error: No IDATs written into file i opened the folder and Icon.png exists!! hope someone can help me :/ 回答1: Please add icon.png in your application plist file under the row icon files . 来源：

问题 So I need this libpng to be statically link with my dll to be used by my exe. This dll is already done before until I switch my compiler from MSVC to MinGW, then this dll won't work anymore so I think I should rebuild it again through MinGW. Now, I cannot resolve the linker errors that I get into libpng so I decided to rebuild it(libpng) myself again . Another problem arises with this zlib or libz (I don't know their difference), so I rebuilt it again and produces libz.a using make . I then

问题 I am reading in images which I fetch from the internet and then immediately read into OpenCV in python as below: # read in image as bytes from page image = page.raw_stream.read() frame = cv2.imdecode(np.asarray(bytearray(image)), 0) and I am getting the libpng warning: libpng warning: iCCP: known incorrect sRGB profile How can I strip the sRGB profile before imread? People are suggesting to do it via imagemagick on the png files before reading them but this is not possible for me. Is there no