From 086cf1c279ba10a0cc67be8c2c99622faafb7b6e Mon Sep 17 00:00:00 2001
From: Mike Jerris <mike@jerris.com>
Date: Tue, 24 Feb 2015 13:51:07 -0600
Subject: [PATCH] FS-7500: expand libpng detection to try to find a good png >=
 1.6.16, fall back to older verison in weezy, and add support for building
 without libpng

---
 Makefile.am             | 12 ++++++++++--
 configure.ac            |  9 ++++++++-
 src/switch_core_video.c | 23 +++++++++++++++++++++++
 3 files changed, 41 insertions(+), 3 deletions(-)

diff --git a/Makefile.am b/Makefile.am
index 6513aa055e..00b74f714b 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -145,6 +145,10 @@ if HAVE_ODBC
 CORE_CFLAGS += -DSWITCH_HAVE_ODBC $(ODBC_INC_FLAGS)
 endif
 
+if HAVE_PNG
+CORE_CFLAGS += -DSWITCH_HAVE_PNG $(LIBPNG_CFLAGS)
+endif
+
 ##
 ## libfreeswitch
 ##
@@ -153,11 +157,15 @@ libfreeswitch_spandsp_la_SOURCES = libs/spandsp/src/plc.c libs/spandsp/src/alloc
 libfreeswitch_spandsp_la_CFLAGS  = -Ilibs/spandsp/src $(CORE_CFLAGS) $(AM_CFLAGS)
 CORE_LIBS+=libfreeswitch_spandsp.la
 lib_LTLIBRARIES	         = libfreeswitch.la
-libfreeswitch_la_CFLAGS  = $(CORE_CFLAGS) $(SQLITE_CFLAGS) $(LIBPNG_CFLAGS) $(FREETYPE_CFLAGS) $(CURL_CFLAGS) $(PCRE_CFLAGS) $(SPEEX_CFLAGS) $(LIBEDIT_CFLAGS) $(openssl_CFLAGS) $(AM_CFLAGS)
+libfreeswitch_la_CFLAGS  = $(CORE_CFLAGS) $(SQLITE_CFLAGS) $(FREETYPE_CFLAGS) $(CURL_CFLAGS) $(PCRE_CFLAGS) $(SPEEX_CFLAGS) $(LIBEDIT_CFLAGS) $(openssl_CFLAGS) $(AM_CFLAGS)
 libfreeswitch_la_LDFLAGS = -version-info 1:0:0 $(AM_LDFLAGS) $(PLATFORM_CORE_LDFLAGS) -no-undefined
-libfreeswitch_la_LIBADD  = $(CORE_LIBS) $(APR_LIBS) $(SQLITE_LIBS) $(LIBPNG_LIBS) $(FREETYPE_LIBS) $(CURL_LIBS) $(PCRE_LIBS) $(SPEEX_LIBS) $(LIBEDIT_LIBS) $(openssl_LIBS) $(VPX_LIBS) $(PLATFORM_CORE_LIBS)
+libfreeswitch_la_LIBADD  = $(CORE_LIBS) $(APR_LIBS) $(SQLITE_LIBS) $(FREETYPE_LIBS) $(CURL_LIBS) $(PCRE_LIBS) $(SPEEX_LIBS) $(LIBEDIT_LIBS) $(openssl_LIBS) $(VPX_LIBS) $(PLATFORM_CORE_LIBS)
 libfreeswitch_la_DEPENDENCIES = $(BUILT_SOURCES)
 
+if HAVE_PNG
+libfreeswitch_la_LIBADD += $(LIBPNG_LIBS)
+endif
+
 if HAVE_ODBC
 libfreeswitch_la_LDFLAGS += $(ODBC_LIB_FLAGS)
 endif
diff --git a/configure.ac b/configure.ac
index 6121b51ea2..9f01f9eed6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1197,7 +1197,14 @@ module_enabled() {
   grep -v -e "\#" -e "^\$" modules.conf | sed -e "s|^.*/||" | grep "^${1}\$" >/dev/null
 }
 
-PKG_CHECK_MODULES([LIBPNG], [libpng >= 1.2.49])
+
+PKG_CHECK_MODULES([LIBPNG], [libpng >= 1.6.16],[
+  AM_CONDITIONAL([HAVE_PNG],[true])],[
+    PKG_CHECK_MODULES([LIBPNG], [libpng16 >= 1.6.16],[
+      AM_CONDITIONAL([HAVE_PNG],[true])],[
+        PKG_CHECK_MODULES([LIBPNG], [libpng >= 1.2.49],[
+          AM_CONDITIONAL([HAVE_PNG],[true])],[
+          AC_MSG_RESULT([no]); AM_CONDITIONAL([HAVE_PNG],[false])])])])
 PKG_CHECK_MODULES([FREETYPE], [freetype2 >= 2.4.9])
 PKG_CHECK_MODULES([SQLITE], [sqlite3 >= 3.6.20])
 PKG_CHECK_MODULES([CURL], [libcurl >= 7.19])
diff --git a/src/switch_core_video.c b/src/switch_core_video.c
index 424afe0f68..68953d45d1 100644
--- a/src/switch_core_video.c
+++ b/src/switch_core_video.c
@@ -717,6 +717,7 @@ SWITCH_DECLARE(void) switch_img_patch_hole(switch_image_t *IMG, switch_image_t *
 #define SWITCH_IMG_MAX_WIDTH  1920 * 2
 #define SWITCH_IMG_MAX_HEIGHT 1080 * 2
 
+#ifdef SWITCH_HAVE_PNG
 // WIP png functions, need furthur tweak/check to make sure it works on all png files and errors are properly detected and reported
 // #define PNG_DEBUG 3
 #define PNG_SKIP_SETJMP_CHECK
@@ -1204,6 +1205,28 @@ end:
 
 #endif
 
+#else
+
+SWITCH_DECLARE(switch_status_t) switch_img_patch_png(switch_image_t *img, int x, int y, const char *file_name)
+{
+	switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "This function is not available, libpng not installed\n");
+	return SWITCH_STATUS_FALSE;
+}
+
+SWITCH_DECLARE(switch_image_t *) switch_img_read_png(const char* file_name)
+{
+	switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "This function is not available, libpng not installed\n");
+	return NULL;
+}
+
+SWITCH_DECLARE(switch_status_t) switch_img_write_png(switch_image_t *img, char* file_name)
+{
+	switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "This function is not available, libpng not installed\n");
+	return SWITCH_STATUS_FALSE;
+}
+
+#endif
+
 SWITCH_DECLARE(switch_status_t) switch_img_fit(switch_image_t **srcP, int width, int height)
 {
 	switch_image_t *src, *tmp = NULL;