diff options
Diffstat (limited to 'README')
| -rw-r--r-- | README | 55 |
1 files changed, 46 insertions, 9 deletions
@@ -4,7 +4,7 @@ \__\__/\____/\_____/__/ ____ ___ / _/ / \ \ / _ \/ _/ / \_/ / / \ \ __/ \__ - \____/____/\_____/_____/____/v0.2.1 + \____/____/\_____/_____/____/v0.2.0 Description: ============ @@ -25,8 +25,8 @@ property rights grant can be found in the file PATENTS. Building: ========= -Windows build: --------------- +Windows build (without experimental features): +---------------------------------------------- By running: @@ -38,6 +38,49 @@ contain the libwebp static library. The target architecture (x86/x64) is detected by Makefile.vc from the Visual Studio compiler (cl.exe) available in the system path. +Windows build (with experimental features): +------------------------------------------- + +This release requires the zlib library. This library is not common under +Windows nor can it be replaced with calls to the Windows API, so you will need +to download it or build it yourself. + +You can either: +(a) Link zlib dynamically (as a DLL). +(b) Link zlib statically. + +Linking it dynamically is easier to do (as you can download a precompiled DLL), +but a bit more cumbersome to use - you need to keep zlib1.dll in the same +directory as the created EXEs. + +a. With dynamic zlib +~~~~~~~~~~~~~~~~~~~~ +1. Download and unpack the archive from http://zlib.net/zlib125-dll.zip. +2. Compile libwebp with the command: + nmake /f Makefile.vc CFG=release-static RTLIBCFG=static OBJDIR=output \ + ZDLLDIR=C:\path\to\the\unpacked\archive EXPERIMENTAL=y +3. Copy C:\path\to\the\unpacked\archive\zlib1.dll to + output\release-static\x86\bin for binaries there to work. +Note: only a 32-bit DLL is currently available for download, so for a 64-bit +build, you will need to build the DLL yourself. + +b. With static zlib +~~~~~~~~~~~~~~~~~~~ + +1. Download and unpack the source code from http://zlib.net/zlib125.zip. +2. For a 32-bit build of zlib compatible with libwebp: + a. Edit zlib's win32\Makefile.msc, adding "-SAFESEH" to ASFLAGS. + b. Compile zlib with the command: + nmake /f win32/Makefile.msc LOC="-DASMV -DASMINF -MT" \ + OBJA="inffas32.obj match686.obj" +3. Compile libwebp with the command + nmake /f Makefile.vc CFG=release-static RTLIBCFG=static OBJDIR=output \ + ZLIBDIR=C:\path\to\the\unpacked\archive experimental +4. Use the binaries in output\release-static\x86\bin. +Note: a 64-bit build of zlib requires different modifications of +Makefile.msc. + + Unix build using makefile.unix: ------------------------------- @@ -171,10 +214,6 @@ options: -hint <string> ......... Specify image characteristics hint. One of: photo, picture or graph - -metadata <string> ..... comma separated list of metadata to - copy from the input to the output if present. - Valid values: all, none (default), exif, iccp, xmp - -short ................. condense printed message -quiet ................. don't print anything. -version ............... print version number and exit. @@ -240,8 +279,6 @@ Use following options to convert into alternate image formats: -ppm ......... save the raw RGB samples as a color PPM -pgm ......... save the raw YUV samples as a grayscale PGM file with IMC4 layout. - -yuv ......... save the raw YUV samples in flat layout. - Other options are: -version .... print version number and exit. -nofancy ..... don't use the fancy YUV420 upscaler. |