Add SkCodec to the CMake build

cmake/CMakeLists.txt

 # Boilerplate.
 cmake_minimum_required (VERSION 3.1)   # First version with CMAKE_CXX_STANDARD.
 project (skimake)
 set (CMAKE_CXX_STANDARD 11)
 
 # Default to Release mode.  We're mainly targeting Skia users, not Skia developers.
 if (NOT CMAKE_BUILD_TYPE)
     set (CMAKE_BUILD_TYPE Release)
 endif ()
 
@@ skipping 95 matching lines @@
 
 if (WIN32)
     if(SKIA_GDI)
         remove_srcs(../src/ports/SkFontMgr_win_dw_factory.cpp)
     else()
         remove_srcs(../src/ports/SkFontMgr_win_gdi_factory.cpp)
     endif()
 endif()
 
 remove_srcs(../src/gpu/gl/angle/*)  # TODO
-remove_srcs(../src/codec/* ../src/android/*)  # TODO: Requires Chromium's libjpeg-turbo, and incompatible giflib.
 
 # Certain files must be compiled with support for SSSE3, SSE4.1, AVX, or AVX2 intrinsics.
 file (GLOB_RECURSE ssse3_srcs ../src/*ssse3*.cpp ../src/*SSSE3*.cpp)
 file (GLOB_RECURSE sse41_srcs ../src/*sse4*.cpp ../src/*SSE4*.cpp)
 file (GLOB_RECURSE avx_srcs   ../src/*_avx.cpp)
 file (GLOB_RECURSE avx2_srcs  ../src/*_avx2.cpp)
 set_source_files_properties(${ssse3_srcs} PROPERTIES COMPILE_FLAGS -mssse3)
 set_source_files_properties(${sse41_srcs} PROPERTIES COMPILE_FLAGS -msse4.1)
 set_source_files_properties(${avx_srcs}   PROPERTIES COMPILE_FLAGS -mavx)
 set_source_files_properties(${avx2_srcs}  PROPERTIES COMPILE_FLAGS -mavx2)
@@ skipping 12 matching lines @@
 if (UNIX AND NOT APPLE)
     find_package (Freetype)
     # Same deal for fontconfig.
     find_path (FONTCONFIG_INCLUDE_DIRS "fontconfig/fontconfig.h")
     find_library (FONTCONFIG_LIBRARIES fontconfig)
     find_package (GIF)
     find_package (JPEG)
     find_package (PNG)
 endif()
 
+# Decide whether to turn on SkCodec.
+# TODO (skbug.com/4956): We should be able to turn specific codecs on and off rather than
+#                        disabling all of them if one library is missing.
+if (NOT (GIF_FOUND AND JPEG_FOUND AND PNG_FOUND AND WEBP_INCLUDE_DIRS AND WEBP_LIBRARIES))

[msarett, 2016/02/16 19:47:12]

Do the CMake bots have libwebp?  Otherwise this CL really won't change anything
(yet).

+    remove_srcs(../src/codec/* ../src/android/*)
+endif()
+
+# Do not compile SkRawCodec.
+remove_srcs(../src/codec/*Raw*.cpp)
+
 # TODO: macro away this if (found) ... else() ... endif() stuff.
 
 if (EXPAT_FOUND)
     list (APPEND private_includes ${EXPAT_INCLUDE_DIRS})
     list (APPEND libs             ${EXPAT_LIBRARIES})
 else()
     remove_srcs (../src/ports/SkFontMgr_android_parser.cpp)
 endif()
 
 if (GIF_FOUND)
@@ skipping 13 matching lines @@
 if (LUA_FOUND)
     list (APPEND private_includes ${LUA_INCLUDE_DIR})
     list (APPEND libs             ${LUA_LIBRARIES})
 else()
     remove_srcs(../src/utils/*Lua*)
 endif()
 
 if (PNG_FOUND)
     list (APPEND private_includes ${PNG_INCLUDE_DIRS})
     list (APPEND libs             ${PNG_LIBRARIES})
+    add_definitions(-DPNG_SKIP_SETJMP_CHECK)
+    add_definitions(-DPNG_SKIP_SKIA_OPTS)
 else()
     remove_srcs(../src/images/*png*)
 endif()
 
 if (ZLIB_FOUND)
     list (APPEND private_includes ${ZLIB_INCLUDE_DIRS})
     list (APPEND libs             ${ZLIB_LIBRARIES})
     remove_srcs(../src/doc/SkDocument_PDF_None.cpp)
 else()
     remove_srcs(../src/pdf/*.cpp ../src/doc/SkDocument_PDF.cpp)
@@ skipping 114 matching lines @@
         file (APPEND ${skia_h_path} "#include \"${filename_component}\"\n")
       endif ()
     endforeach()
   endif()
 endforeach()
 file(APPEND ${skia_h_path} "\n#endif  // skia_DEFINED\n")
 
 # Now build a simple example app that uses Skia via libskia.so.
 add_executable(example example.cpp)
 target_link_libraries(example skia ${OPENGL_LIBRARIES})