Conditional JPEG support

src/Image.cc

@@ -274,7 +274,9 @@ cairo_status_t
 Image::loadSurface() {
   switch (extension(filename)) {
     case Image::PNG: return loadPNG();
+#ifdef HAVE_JPEG
     case Image::JPEG: return loadJPEG();
+#endif
   }
   return CAIRO_STATUS_READ_ERROR;
 }
@@ -291,6 +293,8 @@ Image::loadPNG() {
   return cairo_surface_status(_surface);
 }
 
+#ifdef HAVE_JPEG
+
 /*
  * Load JPEG, convert RGB to ARGB.
  */
@@ -349,6 +353,8 @@ Image::loadJPEG() {
   return cairo_surface_status(_surface);
 }
 
+#endif
+
 /*
  * Return UNKNOWN, JPEG, or PNG based on the filename.
  */

src/Image.h

@@ -33,7 +33,9 @@ class Image: public node::ObjectWrap {
     inline int stride(){ return cairo_image_surface_get_stride(_surface); } 
     cairo_status_t loadSurface();
     cairo_status_t loadPNG();
+#ifdef HAVE_JPEG
     cairo_status_t loadJPEG();
+#endif
     void error(Local<Value>);
     void loadSync();
     void loaded();

wscript

@@ -11,8 +11,9 @@ def configure(conf):
   conf.check_tool('compiler_cxx')
   conf.check_tool('node_addon')
   conf.env.append_value('CPPFLAGS', '-DNDEBUG')
-  conf.check(lib='jpeg', uselib_store='JPEG')
-  conf.check_cfg(package='cairo', mandatory=1, args='--cflags --libs')
+  if conf.check(lib='jpeg', uselib_store='JPEG', mandatory=False):
+    conf.env.append_value('CPPFLAGS', '-DHAVE_JPEG=1')
+  conf.check_cfg(package='cairo', args='--cflags --libs', mandatory=True)
   flags = ['-O3', '-Wall']
   conf.env.append_value('CCFLAGS', flags)
   conf.env.append_value('CXXFLAGS', flags)