dhowett / pincrush

Pincrush is an open PNG optimizer implementing Apple's proprietary CgBI format.

An attempt to replicate Apple's PNG Mangler.

Apple's PNG files are nowhere near valid (extra critical chunk with an unknown format, zlib headers discarded, premultiplied alpha). "Think different" and all that.

Prerequisites

• a compiler
  • (for iPhone compilation) Apple's Xcode or the open toolchain

Compiling

• iPhone (default target)

    make
  

• Native (linux, OS X)

    make target=native
  

pincrush's Issues

License?

Hi Dustin,

thanks for the great library! What license it it under? Can you make it MIT?
the code may imply that it's public domain, but I don't like ambiguity.

Thanks!
Peter

Error when compiling

I see that you were active here a few days ago, so I hope you will see this too!

At first it complain about not finding g++, so I made a symlink. A little later it crashes during compiling. Do you have any idea what might be wrong?

~/Dropbox/Developer/iOS/pincrush(master) » sudo ln -s /usr/bin/g++ /usr/bin/g++-4.2      andeh@A-MBP
------------------------------------------------------------
~/Dropbox/Developer/iOS/pincrush(master) » make target=native                            andeh@A-MBP
Making all in subprojects of tool pincrush...
Making all for subproject png...
 Compiling png.c...
png.c:548:12: error: explicitly assigning value of variable of type 'png_structp'
      (aka 'struct png_struct_def *') to itself [-Werror,-Wself-assign]
   png_ptr = png_ptr;  /* Silence compiler warning about unused png_ptr */
   ~~~~~~~ ^ ~~~~~~~
png.c:580:12: error: explicitly assigning value of variable of type 'png_structp'
      (aka 'struct png_struct_def *') to itself [-Werror,-Wself-assign]
   png_ptr = png_ptr;  /* Silence compiler warning about unused png_ptr */
   ~~~~~~~ ^ ~~~~~~~
png.c:588:12: error: explicitly assigning value of variable of type 'png_structp'
      (aka 'struct png_struct_def *') to itself [-Werror,-Wself-assign]
   png_ptr = png_ptr;  /* Silence compiler warning about unused png_ptr */
   ~~~~~~~ ^ ~~~~~~~
png.c:596:12: error: explicitly assigning value of variable of type 'png_structp'
      (aka 'struct png_struct_def *') to itself [-Werror,-Wself-assign]
   png_ptr = png_ptr;  /* Silence compiler warning about unused png_ptr */
   ~~~~~~~ ^ ~~~~~~~
4 errors generated.
make[3]: *** [obj/macosx/png.c.o] Error 1
make[2]: *** [internal-subproject-all_] Error 2
make[1]: *** [png.all.subproject.variables] Error 2
make: *** [pincrush.all.tool.variables] Error 2

Can't compile with Xcode 4

The old g++-4.2 doesn't exist, they've moved on to the llvm compiler.

pincrush causes png images broken

theos is using pincrush to optimize the png images but it will cause pngs broken, any idea?

ifeq ($(_THEOS_FINAL_PACKAGE),$(_THEOS_TRUE))
# 	causes png broken
# 	find $(THEOS_STAGING_DIR) -name \*.png -a ! -type l -exec pincrush -i {} \;
	find $(THEOS_STAGING_DIR) \( -name \*.plist -or -name \*.strings \) -exec plutil -convert binary1 {} \;
endif