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swig: add basic go bindings

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WebPGetDecoderVersion
WebPGetInfo

Change-Id: Icb66207c2f492c9d20642544c0b31cc92b91cdcc
This commit is contained in:
James Zern
2013-10-29 19:51:46 +01:00
parent 1939607e7f
commit e4e7fcd69b
4 changed files with 418 additions and 5 deletions
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52
swig/libwebp.swig
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@@ -12,6 +12,11 @@
// Author: James Zern (jzern@google.com)
/*
Go bindings:
$ swig -go \
-outdir . \
-o libwebp_go_wrap.c libwebp.swig
Java bindings:
$ mkdir -p java/com/google/webp
$ swig -java \
@@ -34,6 +39,13 @@
%include "constraints.i"
%include "typemaps.i"
#ifdef SWIGGO
%apply (char* STRING, size_t LENGTH) { (const uint8_t* data, size_t data_size) }
%rename(wrapped_WebPGetInfo) WebPGetInfo(const uint8_t* data, size_t data_size,
int* width, int* height);
#endif /* SWIGGO */
#ifdef SWIGJAVA
%include "arrays_java.i";
%include "enums.swg" /*NB: requires JDK-1.5+
@@ -96,6 +108,12 @@ DECODE_AUTODOC(WebPDecodeBGRA);
%apply int* OUTPUT { int* width, int* height }
int WebPGetDecoderVersion(void);
int WebPGetInfo(const uint8_t* data, size_t data_size,
int* width, int* height);
#if defined(SWIGJAVA) || defined(SWIGPYTHON)
// free the buffer returned by these functions after copying into
// the native type
%newobject WebPDecodeRGB;
@@ -105,10 +123,6 @@ DECODE_AUTODOC(WebPDecodeBGRA);
%newobject WebPDecodeBGRA;
%typemap(newfree) uint8_t* "free($1);"
int WebPGetDecoderVersion(void);
int WebPGetInfo(const uint8_t* data, size_t data_size,
int* width, int* height);
uint8_t* WebPDecodeRGB(const uint8_t* data, size_t data_size,
int* width, int* height);
uint8_t* WebPDecodeRGBA(const uint8_t* data, size_t data_size,
@@ -120,11 +134,17 @@ uint8_t* WebPDecodeBGR(const uint8_t* data, size_t data_size,
uint8_t* WebPDecodeBGRA(const uint8_t* data, size_t data_size,
int* width, int* height);
#endif /* SWIGJAVA || SWIGPYTHON */
//------------------------------------------------------------------------------
// Encoder specific
#if defined(SWIGJAVA) || defined(SWIGPYTHON)
int WebPGetEncoderVersion(void);
#endif /* SWIGJAVA || SWIGPYTHON */
//------------------------------------------------------------------------------
// Wrapper code additions
@@ -193,7 +213,6 @@ static size_t ReturnedBufferSize(
return size;
}
%}
#endif /* SWIGJAVA || SWIGPYTHON */
%{
typedef size_t (*WebPEncodeFunction)(const uint8_t* rgb,
@@ -232,9 +251,13 @@ static uint8_t* EncodeLossless(const uint8_t* rgb,
}
%}
#endif /* SWIGJAVA || SWIGPYTHON */
//------------------------------------------------------------------------------
// libwebp/encode wrapper functions
#if defined(SWIGJAVA) || defined(SWIGPYTHON)
%apply int* INPUT { int* unused1, int* unused2 }
%apply int* OUTPUT { int* output_size }
@@ -304,9 +327,28 @@ LOSSLESS_WRAPPER(WebPEncodeLosslessBGRA)
%}
#endif /* SWIGJAVA || SWIGPYTHON */
//------------------------------------------------------------------------------
// Language specific
#ifdef SWIGGO
%insert(go_wrapper) %{
// WebPGetInfo has 2 output parameters, provide a version in the more natural
// go idiom:
func WebPGetInfo(webp []byte) (ok bool, width int, height int) {
w := []int{0}
h := []int{0}
ok = Wrapped_WebPGetInfo(string(webp), w, h) != 0
width = w[0]
height = h[0]
return
}
%}
#endif /* SWIGGO */
#ifdef SWIGJAVA
%{
/* Work around broken gcj jni.h */