skia

问题 I am looking for ideas regarding an optimal/minimal structure for the inner render loop in Dart 2, for a 2d game (if that part matters). Clarification / Explanation: Every framework / language has an efficient way to: 1) Deal with time. 2) Render to the screen (via memory, a canvas, an image, or whatever). For an example, here is someone that answered this for the C# language. Being new to Flutter / Dart, my first attempt (below), is failing to work and as of right now, I can not tell where

问题 I am working on an Android project in which I am retrieving a list of Person's and trying to display them. The Person class contains the profilePhoto as String and I am able to see it saved in DB, after retrieving a List of Person, I am able to print it in Log.d. But the Skia thing is cribbing that Factory is null. I know there are other questions with same subject line, but I am not retriving only image, I am retrieving a List of Persons and image is just a variable in it. Why am I getting

问题 HI, I am currently studying how Android decode and image file. When I checked the code, it seems like it is calling the SKIA library. But, how do I know what are the image file format supported by android/skia basing on the source code? I am not an expert in programming, so I am still trying to understand C++ and Java language. I am now lost at SkImageDecoder* decoder = SkImageDecoder::Factory(stream); inside the BitmapFactory.cpp (JNI file). SkImageDecoder::Factory(stream) seems to be a

问题 I'm trying to use SKIA for drawing on Windows. Is there anyway to initiate SkCanvas from HDC ? 回答1: There are several approaches "to use" skia on Windows. These approaches described in the SkOSWindow_win.cpp at the skia\src\views\win in your skia folder. For example: You can attach OpenGL viewport to your window as it has been done in function SkOSWindow::attachGL HDC dc = GetDC((HWND)fHWND); if (NULL == fHGLRC) { fHGLRC = SkCreateWGLContext(dc, msaaSampleCount, kGLPreferCompatibilityProfile

问题 I am trying to open a remote Stream of a JPEG image and convert it into a Bitmap object: BitmapFactory.decodeStream( new URL("http://some.url.to/source/image.jpg") .openStream()); The decoder returns null and in the logs I get the following message: DEBUG/skia(xxxx): --- decoder->decode returned false Note: 1. the content length is non-zero and content type is image/jpeg 2. When I open the URL in browser I can see the image. What is that I am missing here? Please help. Thanks. 回答1: The

问题 I try to bulid skia on ios.And I down load it then run SampleApp on the mac os.So I want to use it on ios.But when I open the xcodeproj,there are so many files unexits in the project!So what can I do with it and How to build skia for ios?? Thank you for Advance!! 回答1: The commands below worked for me, this trick is to instruct the (curious) build process not to look for dependencies on the build machine: [ -d depot_tools ] || git clone https://chromium.googlesource.com/chromium/tools/depot

问题 I would like to render an SVG I've created to a hi-res (600 DPI) PNG. This SVG has filter effects, specifically gaussian blur. Ideally rendering could be done via the command line. I know the SVG is renderable because you can open it in Chrome/Chromium and the output I'd like to see is there . Things I've tried: Importing to Adobe Illustrator svg2png Imagemagick Inkscape Other command-line tools and programs I'm forgetting right now. Basically anything you could find with Google. Current path

问题 Canvas.drawText() doesn't render emojis above a certain font size on Android. Correct render at somewhere below 256 px: Incorrect render at above 256 px: (There is a similar question about Google Chrome, and just like Android, Chrome also uses the Skia graphics library, so this seems like a bug in Skia .) Apparently emojis fail to render above 256 px font size on my devices. But I'm not sure if this is the limit everywhere. Is there a way to learn the font size at which emojis disappear? Or

问题 I'm making an app that show a lot of images that are generated from PDF-files by Imagemagick. Some of the images, can't be loaded with BitmapFactory. It simply returns null istead of a bitmap. The log says: D/skia(15101): --- decoder->decode returned false It isn't a memory problem as some of the images with the problem is very small, and the images aren't corrupt because I can show them on any other machine. Additionally BitmapFactory is able to decode the width and height if I use

问题 I haven't found a clear explanation on how the Android graphics system works, specifically, does it use a display server, is it based on DirectFB or X11, etc. From what I've managed to piece together, Android depends on the Linux frame buffer. I haven't found much on what sort of display server or window manager Android uses to multiplex access to the framebuffer though, so any pointers would be much appreciated! Finally, from what I understand the ARM instruction set provides instructions to