---

Pillow是python的圖像處理庫，可以從github下載pillow中部分代碼使用C編寫，如果需要在IOS環境中使用，則需要編譯為IOS的靜態庫。通過python命令編譯出來的是共享庫，需要使用ar命令將目標文件打包成靜態庫

Pillow使用了jpeg, png, freetype庫，首先需要編譯它們為靜態庫.

1.編譯jpeg,png,freetype為靜態庫

jpeg使用版本jpegsrc.v9b；png使用版本libpng-1.6.26

a.首先設置交叉編譯環境

export PATH="/Applications/Xcode.app/Contents/Developer/Toolchains/Xcodedefault.xctoolchain/usr/bin/:/usr/local/bin:/usr/bin:/bin:$PATH"

export CFLAGS="-DIOS -arch x86_64 -miphoneos-version-min=6.0 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator9.3.sdk"

export CXXFLAGS="$CFLAGS"

export CC="clang $CFLAGS"

export CXX="clang++ $CXXFLAGS"

export LDFLAGS=""

export AR="ar"

export RANLIB="ranlib"

export STRIP="strip"

export MAKE="make -j4"

b.編譯jpeg

解壓jpegsrc.v9b.tar.gz

./configure LDFLAGS="-lm" CFLAGS="-fomit-frame-pointer -Wno-format" --disable-shared --host=x86_64-iphone-darWin --build=x86_64-apple-darWin  --prefix="$(pwd)/../install/jpeg9b.x86_64"
make
make install

c.編譯png

解壓libpng-1.6.26.tar.gz

./configure --disable-shared --host=x86_64-iphone-darWin --build=x86_64-apple-darwin  --prefix="$(pwd)/../install/libpng1626.x86_64"
make
make install

d.編譯freetype

解壓freetype-2.6.5.tar.gz

./configure LDFLAGS="-lm" LIBPNG_LIBS="-L$(pwd)../install/libpng1626.x86_64/lib" CFLAGS="-fomit-frame-pointer -Wno-format" LIBPNG_CFLAGS="-I$(pwd)/../install/libpng1626.x86_64/include" --disable-shared --host=x86_64-iphone-darwin --build=x86_64-apple-darwin  --prefix="$(pwd)/../install/freetype265.x86_64"
make
make install

2. 編譯pillow

從github下載pillow，解壓Pillow-master.zip

在ios環境中，pillow支持交叉編譯，但編譯之後生成的為動態庫，需要手動連接靜態庫

編譯需要python頭文件,下載starcore_for_ios,解壓到pillow同級目錄

設置編譯環境

export PATH="/Applications/Xcode.app/Contents/Developer/Toolchains/Xcodedefault.xctoolchain/usr/bin/:/usr/local/bin:/usr/bin:/bin:$PATH"

export ARCH="x86_64"

export CFLAGS="-fomit-frame-pointer -miphoneos-version-min=6.0 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator9.3.sdk -I../starcore_for_ios/python.files/python-2.7/include -I../install/jpeg9b.x86_64/include  -I../install/freetype265.x86_64/include"

export CXXFLAGS="$CFLAGS"

export CC="clang"

export LDFLAGS="-lm -L../starcore_for_ios/python.files/python-2.7  -L../install/jpeg9b.x86_64/lib -L../install/freetype265.x86_64/lib  -L../install/libpng1626.x86_64/lib"

export CXX="clang++"
 
export AR="ar"

export RANLIB="ranlib"

export STRIP="strip"

export MAKE="make -j4"

使用python2.7編譯

python setup.py build

編譯結果在Pillow-master/build/lib.linux-x86_64-2.7

生成靜態庫

export OP="./build/temp.macosx-10.4-x86_64-2.7"
＃_imaging.a

/Applications/Xcode.app/Contents/Developer/Toolchains/Xcodedefault.xctoolchain/usr/bin/ar rc _imaging.a $OP/_imaging.o $OP/decode.o $OP/encode.o $OP/map.o $OP/display.o $OP/outline.o $OP/path.o $OP/libImaging/Access.o $OP/libImaging/AlphaComposite.o $OP/libImaging/Resample.o $OP/libImaging/Bands.o $OP/libImaging/BcnDecode.o $OP/libImaging/BitDecode.o $OP/libImaging/Blend.o $OP/libImaging/Chops.o $OP/libImaging/Convert.o $OP/libImaging/ConvertYCbCr.o $OP/libImaging/Copy.o $OP/libImaging/Crc32.o $OP/libImaging/Crop.o $OP/libImaging/Dib.o $OP/libImaging/Draw.o $OP/libImaging/Effects.o $OP/libImaging/EpsEncode.o $OP/libImaging/File.o $OP/libImaging/Fill.o $OP/libImaging/Filter.o $OP/libImaging/FliDecode.o $OP/libImaging/Geometry.o $OP/libImaging/GetBBox.o $OP/libImaging/GifDecode.o $OP/libImaging/GifEncode.o $OP/libImaging/HexDecode.o $OP/libImaging/Histo.o $OP/libImaging/JpegDecode.o $OP/libImaging/JpegEncode.o $OP/libImaging/LzwDecode.o $OP/libImaging/Matrix.o $OP/libImaging/ModeFilter.o $OP/libImaging/MspDecode.o $OP/libImaging/Negative.o $OP/libImaging/Offset.o $OP/libImaging/Pack.o $OP/libImaging/PackDecode.o $OP/libImaging/Palette.o $OP/libImaging/Paste.o $OP/libImaging/Quant.o $OP/libImaging/QuantOctree.o $OP/libImaging/QuantHash.o $OP/libImaging/QuantHeap.o $OP/libImaging/PcdDecode.o $OP/libImaging/PcxDecode.o $OP/libImaging/PcxEncode.o $OP/libImaging/Point.o $OP/libImaging/RankFilter.o $OP/libImaging/RawDecode.o $OP/libImaging/RawEncode.o $OP/libImaging/Storage.o $OP/libImaging/SunRleDecode.o $OP/libImaging/TgaRleDecode.o $OP/libImaging/Unpack.o $OP/libImaging/UnpackYCC.o $OP/libImaging/UnsharpMask.o $OP/libImaging/XbmDecode.o $OP/libImaging/XbmEncode.o $OP/libImaging/ZipDecode.o $OP/libImaging/ZipEncode.o $OP/libImaging/TiffDecode.o $OP/libImaging/Jpeg2KDecode.o $OP/libImaging/Jpeg2KEncode.o $OP/libImaging/BoxBlur.o $OP/libImaging/QuantPngQuant.o $OP/libImaging/codec_fd.o

＃_imagingft.a
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar rc _imagingft.a $OP/_imagingft.o

＃_imagingmath.a
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar rc _imagingmath.a $OP/_imagingmath.o

＃_imagingmorph.a
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar rc _imagingmorph.a $OP/_imagingmorph.o

＃_imagingtk.a
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar rc _imagingtk.a $OP/_imagingtk.o $OP/Tk/tkImaging.o

3.測試pillow

創建xcode工程，添加cle，python,以及上面生成的jpeg,png,freetype,pillow的靜態庫。將/build/temp.macosx-10.4-x86_64-2.7/PIL目錄及文件添加到工程，需要刪除編譯生成的.so文件

靜態庫需要預先導入，而且需要修改對應.py文件中的導入相關的代碼，不能從包中導入，修改Image.py

    #from PIL import _imaging as core
    import _imaging as core
    if PILLOW_VERSION != getattr(core, 'PILLOW_VERSION', None):
        raise ImportError("The _imaging extension was built for another "
                          "version of Pillow or PIL")

創建測試testpillow.py

import traceback
print(Star_folder)
try:
  from PIL import Image
  print(Image)


  im = Image.open(Star_folder+"/Add.png")
  print(im.format, im.size, im.mode)

except Exception,e:
    traceback.print_exc()

初始化加載pillow靜態庫

extern "C" void init_imaging(void);
extern "C" void init_imagingmorph(void);
extern "C" void init_imagingft(void);
extern "C" void init_imagingmath(void);


    static VSImportPythonCModuleDef CModuleDef[]={{"_imaging",(void*)init_imaging},{"_imagingmorph",(void*)init_imagingmorph},{"_imagingft",(void*)init_imagingft},{"_imagingmath",(void*)init_imagingmath},{NULL,NULL}};
    
    VSCoreLib_InitPython((VS_CHAR*)python_home,(VS_CHAR *)python_path,CModuleDef);

運行test_pillow.py

    char FileBuf[256];
    
    SRPInterface->ScriptSetStr(python,"Star_folder",res_cpath);
    
    sprintf(FileBuf,"%s/test_pillow.py",res_cpath);
    SRPInterface->DoFile("python", FileBuf, NULL,NULL,VS_FALSE);

編譯需要starcore_for_ios：解壓後放在同一目錄：

示例下載

以上就是為ios編譯python的圖像庫pillow的全文介紹,希望對您學習和使用ios應用開發有所幫助.[db:作者簡介][db:原文翻譯及解析]

【為ios編譯python的圖像庫pillow】的相關資料介紹到這裡，希望對您有所幫助！ 提示：不會對讀者因本文所帶來的任何損失負責。如果您支持就請把本站添加至收藏夾哦！