gstreamer1.0-plugins-bad: Fix little rectangel appears at the center when use squeeze and tunnel effects

(From OE-Core rev: 061990f9aa97f2dac88e473b9852aed6f3f00f32)

Signed-off-by: Yuqing Zhu <carol.zhu@nxp.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-multimedia/gstreamer/gstreamer1.0-plugins-bad/0007-glplugin-gleffects-fix-little-rectangel-appears-at-t.patch

@@ -0,0 +1,46 @@
+From 43549773608b4f58dc664b7115a1ef0dcb32f251 Mon Sep 17 00:00:00 2001
+From: Haihua Hu <jared.hu@nxp.com>
+Date: Tue, 14 Jun 2016 13:48:09 +0800
+Subject: [PATCH 1/2] [glplugin]gleffects: fix little rectangel appears at the
+ center when use squeeze and tunnel effects
+
+These two shader will calculate the verctor length and use it as denominator.
+But length could be zero which will cause undefine behaviour. Add protection for
+this condition
+
+Upstream-Status: Backport [1.8.3]
+
+https://bugzilla.gnome.org/show_bug.cgi?id=767635
+
+Signed-off-by: Haihua Hu <jared.hu@nxp.com>
+---
+ ext/gl/effects/gstgleffectssources.c | 6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+diff --git a/ext/gl/effects/gstgleffectssources.c b/ext/gl/effects/gstgleffectssources.c
+index 6bdc155..3e87b8b 100644
+--- a/ext/gl/effects/gstgleffectssources.c
++++ b/ext/gl/effects/gstgleffectssources.c
+@@ -100,7 +100,8 @@ const gchar *squeeze_fragment_source_gles2 =
+   "void main () {"
+   "  vec2 texturecoord = v_texcoord.xy;"
+   "  vec2 normcoord = texturecoord - 0.5;"
+-  "  float r = length (normcoord);"
++  /* Add a very small value to length otherwise it could be 0 */
++  "  float r = length (normcoord)+0.01;"
+   "  r = pow(r, 0.40)*1.3;"
+   "  normcoord = normcoord / r;"
+   "  texturecoord = (normcoord + 0.5);"
+@@ -136,7 +137,8 @@ const gchar *tunnel_fragment_source_gles2 =
+    * rect textures */
+   "  normcoord = (texturecoord - 0.5);"
+   "  float r = length(normcoord);"
+-  "  normcoord *= clamp (r, 0.0, 0.275) / r;"
++  "  if (r > 0.0)"
++  "    normcoord *= clamp (r, 0.0, 0.275) / r;"
+   "  texturecoord = normcoord + 0.5;"
+   "  gl_FragColor = texture2D (tex, texturecoord);"
+   "}";
+-- 
+1.9.1
+

meta/recipes-multimedia/gstreamer/gstreamer1.0-plugins-bad_1.8.2.bb

@@ -17,6 +17,7 @@ SRC_URI = " \
     file://0004-glcolorconvert-don-t-use-the-predefined-variable-nam.patch \
     file://0005-glshader-add-glBindFragDataLocation.patch \
     file://0006-glcolorconvert-GLES3-deprecates-texture2D-and-it-doe.patch \
+    file://0007-glplugin-gleffects-fix-little-rectangel-appears-at-t.patch \
 "
 SRC_URI[md5sum] = "83abc2e70684e7b195f18ca2992ef6e8"
 SRC_URI[sha256sum] = "d7995317530c8773ec088f94d9320909d41da61996b801ebacce9a56af493f97"