remove libpng

CMakeLists.txt

@@ -11,7 +11,6 @@ FIND_PACKAGE(OpenGL REQUIRED)
 FIND_PACKAGE(Lua51 REQUIRED)
 FIND_PACKAGE(YamlCpp REQUIRED)
 FIND_PACKAGE(PhysFS REQUIRED)
-FIND_PACKAGE(PNG REQUIRED)
 FIND_PACKAGE(GMP REQUIRED)
 
 # choose a default build type if not specified
@@ -35,15 +34,13 @@ INCLUDE_DIRECTORIES(
     ${YAMLCPP_INCLUDE_DIRS}
     ${PHYSFS_INCLUDE_DIRS}
     ${GMP_INCLUDE_DIR}
-    ${PNG_INCLUDE_DIRS}
     "${CMAKE_CURRENT_SOURCE_DIR}/src/framework")
 
 LINK_DIRECTORIES(
     ${Boost_LIBRARY_DIRS}
     ${LUA_LIBRARY_DIRS}
     ${PHYSFS_LIBRARY_DIRS}
-    ${YAMLCPP_LIBRARY_DIRS}
-    ${PNG_LIBRARY_DIRS})
+    ${YAMLCPP_LIBRARY_DIRS})
 
 # setup definitions
 ADD_DEFINITIONS(-D_REENTRANT)

src/framework/graphics/textureloader.h

@@ -31,7 +31,7 @@
 class TextureLoader
 {
 public:
-    /// Load a png textures using libpng
+    /// Load a png textures
     static TexturePtr loadPNG(uchar *fileData, uint fileSize);
 };