libpng

lamp安装

由 自闭症网瘾萝莉.ら 提交于 2019-12-10 05:31:28
一、简介 什么是LAMP LAMP是一种Web网络应用和开发环境，是Linux, Apache, MySQL, Php/Perl的缩写，每一个字母代表了一个组件，每个组件就其本身而言都是在它所代表的方面功能非常强大的组件。 LAMP这个词的由来最早始于德国杂志“c't Magazine”，Michael Kunze在1990年最先把这些项目组合在一起创造了LAMP的缩写字。这些组件并不是开始就设计为一起使用的，但是，这些软件都是开源的，可以很方便的随时获得并免费使用，这就导致了这些组件经常在一起使用。这些组件的兼容性也在不断完善，为了改善不同组件之间的协作，已经创建了某些扩展功能，在一起的应用情形变得非常普便，因而成为目前最流行的web应用基础架构。 LAMP的组件 平台由四个组件组成，呈分层结构，每一层都提供了整个架构的一个关键部分： Linux：Linux 处在最底层，提供操作系统。它的灵活性和可定制化的特点意味着它能够产生一种高度定制的平台，让其它组件在上面运行。其它组件运行于Linux 之上，但是并不一定局限于 Linux，也可以在 Microsoft Windows, Mac OS X 或 UNIX上运行。 Apache：Apache位于第二层，它是一个Web 服务平台，提供可让用户获得 Web 页面的机制。Apache 是一款功能强大、稳定、可支撑关键任务的Web服务器

Rendering waveform in PHP - How to produce a more compressed render?

由 偶尔善良 提交于 2019-12-10 01:47:48
问题 I am rendering a waveform in PHP by downsampling it with the lame encoder and then drawing the waveform from the resulting data points. I am currently getting images like this: What I would like to do is modify my code so that the apparent dynamic range of the waveform is essentially 'compressed'. To produce a waveform that looks more like this: The equation I am currently using to render the height of each data point is as follows:- // draw this data point // relative value based on height

cmake - CMakeLists.txt is not in root folder (but is included in source)

由 ≡放荡痞女 提交于 2019-12-09 17:53:35
问题 I'm trying to compile a libpng library. The thing is that I need a specific version of this library - 1.2.37 - because the project I'm using it in is written with this version. I've found the source code of this version here (GnuWin32 project). But the folder structure looks something like this: libpng-1.2.37-src/ contrib/ projects/ scripts/ CMakeLists.txt png.h pngread.c pngwrite.c ... See, the CMakeLists.txt is one level deeper than the source files. I've tried: source directory libpng-1.2

XCode编译报pngcrush caught libpng error错误但不影响运行

由 ￡可爱￡侵袭症＋ 提交于 2019-12-09 10:16:13
一直以来，我的Xcode项目编译偶尔会出现类似于While reading xx/BackgroundHomeScreen_5.png pngcrush caught libpng error的错误提示（不是警告），但是这个错误并不会影响应用运行，所以也就没管，今天正好有空解决这个问题。 根据网上搜到的资料，说出问题的png文件不是真正的png文件，可能是个jpg文件，实际的文件头信息是不一样的，造成不能识别。 然后我搜了一下Mac里检测图片真正格式的途径，找到了用文件头来检测图片格式的方法： JPEG/JPG - 文件头标识 (2 bytes): $ff, $d8 (SOI) (JPEG 文件标识) - 文件结束标识 (2 bytes): $ff, $d9 (EOI) TGA - 未压缩的前5字节 00 00 02 00 00 - RLE压缩的前5字节 00 00 10 00 00 PNG - 文件头标识 (8 bytes) 89 50 4E 47 0D 0A 1A 0A GIF - 文件头标识 (6 bytes) 47 49 46 38 39(37) 61 G I F 8 9 (7) a BMP - 文件头标识 (2 bytes) 42 4D B M PCX - 文件头标识 (1 bytes) 0A TIFF - 文件头标识 (2 bytes) 4D 4D 或 49 49

【有关问题处理】Icon.png pngcrush caught libpng error:Read

由 ☆樱花仙子☆ 提交于 2019-12-09 10:15:58
【问题处理】Icon.png pngcrush caught libpng error:Read Error 遇到问题 在项目Archive时，遇到 Icon.png pngcrush caught libpng error: Read Error错误 处理方法 Icon.png的导出有问题，不能含有透明元素。//我的就是这个问题 重新导出再加入后就正常编译不报错了 如果是用Mac自带preview（预览）导出的，那么Icon.png导出的时候不能选择alpha，重新导出下替换掉就可以了。 如果是PhotoShop导出的，要以NOT INTERLACED方式保存。 来源： oschina 链接： https://my.oschina.net/u/2363065/blog/618873

libpng error: Not a PNG file

由 ↘锁芯ラ 提交于 2019-12-09 06:07:44
问题 I have tried several times to upgrade Android Studio build tools past 1.3.1, but I always end up with this libpng error. I solved one of the errors by completely removing a maven dependency (since the gradle console pointed to exactly where the problem file was), but now I am stuck with the same error and no pointer as to where the problem file is. Am I missing something? Here is the gradle console log: Executing tasks: [:app:generateDebugSources, :app:generateDebugAndroidTestSources]

libpng: writing a png fails: stops at header write error

由 喜你入骨 提交于 2019-12-08 12:03:56
问题 I can't figure out what is wrong. When I try to write the PNG, I get an error: "Error during writing header". Do I need to include something else? I took the .lib/.h files from here: http://www.eden.net.nz/7/20071024/ Edit: I finally managed to make this work. The solution: #pragma comment(lib, "zlib_s.lib") // must be before libpng! #pragma comment(lib, "libpng_s.lib") // must be after zlib! Weird, huh? Here is the working code, it's a slightly modified version of: http://zarb.org/~gc/html

read a png image in buffer

由 此生再无相见时 提交于 2019-12-08 05:06:21
问题 hi i have used libpng to convert grayscale png image to raw image using c. in that lib the function png_init_io needs file pointer to read the png. but i pass the png image as buffer is there any other alternative functions to to read png image buffer to raw image. please help me int read_png(char *file_name,int *outWidth,int *outHeight,unsigned char **outRaw) /* We need to open the file */ { ...... /* Set up the input control if you are using standard C streams */ png_init_io(png_ptr, fp); .

Cannot open include file: 'pnglibconf.h':No such file or directory

由 会有一股神秘感。 提交于 2019-12-08 03:23:34
问题 I'm trying to build libpng in MS Visual studio 2015 community edition but when i built it, i got this error (i used cmake to compile libpng along with compiled zlib to produce libpng's soln file ALL_BUILD.vcxproj ) Cannot open include file: 'pnglibconf.h':No such file or directory I think this a system specific error,when i try to build this on other system it works fine(because pnglibconfig.h was present with MS VS soln folder). Is there any prerequisites that is missing? Update: I tried

libpng framework on OS X

由 跟風遠走 提交于 2019-12-08 02:07:07
问题 I'm looking for an Xcode project file that will let me trivially build a dynamic framework for libpng to embed in a Mac OS X application bundle. I found this project for libpng 1.2.8, but I need something reasonably current. I can make the project file myself, but I'd rather not reinvent the wheel if I don't have to. Does this already exist, and if so, where? 回答1: Check out the KyngChaos UnixImageIO framework. It includes libpng. 回答2: If you download the libpng framework code from http://www
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