diff --git a/spine-c/spine-c/src/spine/SkeletonJson.c b/spine-c/spine-c/src/spine/SkeletonJson.c
index c0a0aa8fd..c8a3da95d 100644
--- a/spine-c/spine-c/src/spine/SkeletonJson.c
+++ b/spine-c/spine-c/src/spine/SkeletonJson.c
@@ -1258,6 +1258,8 @@ spSkeletonData *spSkeletonJson_readSkeletonData(spSkeletonJson *self, const char
 				data->spacingMode = SP_SPACING_MODE_FIXED;
 			else if (strcmp(item, "percent") == 0)
 				data->spacingMode = SP_SPACING_MODE_PERCENT;
+			else
+				data->spacingMode = SP_SPACING_MODE_PROPORTIONAL;
 
 			item = Json_getString(constraintMap, "rotateMode", "tangent");
 			if (strcmp(item, "tangent") == 0) data->rotateMode = SP_ROTATE_MODE_TANGENT;
diff --git a/spine-cocos2dx/spine-cocos2dx/src/spine/v4/SkeletonBatch.cpp b/spine-cocos2dx/spine-cocos2dx/src/spine/v4/SkeletonBatch.cpp
index 453eac067..9a1ca9262 100644
--- a/spine-cocos2dx/spine-cocos2dx/src/spine/v4/SkeletonBatch.cpp
+++ b/spine-cocos2dx/spine-cocos2dx/src/spine/v4/SkeletonBatch.cpp
@@ -40,6 +40,7 @@ using std::max;
 
 #include "renderer/backend/Device.h"
 #include "renderer/ccShaders.h"
+#include "renderer/backend/Types.h"
 
 namespace spine {
 
@@ -89,17 +90,17 @@ namespace spine {
 	void SkeletonBatch::updateProgramStateLayout(cocos2d::backend::ProgramState *programState) {
 		auto vertexLayout = programState->getVertexLayout();
 
-		auto locPosition = programState->getAttributeLocation("a_position");
-		auto locTexcoord = programState->getAttributeLocation("a_texCoord");
-		auto locColor = programState->getAttributeLocation("a_color");
-		vertexLayout->setAttribute("a_position", locPosition, backend::VertexFormat::FLOAT3, offsetof(V3F_C4B_T2F, vertices), false);
-		vertexLayout->setAttribute("a_color", locColor, backend::VertexFormat::UBYTE4, offsetof(V3F_C4B_T2F, colors), true);
-		vertexLayout->setAttribute("a_texCoord", locTexcoord, backend::VertexFormat::FLOAT2, offsetof(V3F_C4B_T2F, texCoords), false);
+		auto locPosition = programState->getAttributeLocation(backend::ATTRIBUTE_NAME_POSITION);
+		auto locTexcoord = programState->getAttributeLocation(backend::ATTRIBUTE_NAME_TEXCOORD);
+		auto locColor = programState->getAttributeLocation(backend::ATTRIBUTE_NAME_COLOR);
+		vertexLayout->setAttribute(backend::ATTRIBUTE_NAME_POSITION, locPosition, backend::VertexFormat::FLOAT3, offsetof(V3F_C4B_T2F, vertices), false);
+		vertexLayout->setAttribute(backend::ATTRIBUTE_NAME_COLOR, locColor, backend::VertexFormat::UBYTE4, offsetof(V3F_C4B_T2F, colors), true);
+		vertexLayout->setAttribute(backend::ATTRIBUTE_NAME_TEXCOORD, locTexcoord, backend::VertexFormat::FLOAT2, offsetof(V3F_C4B_T2F, texCoords), false);
 		vertexLayout->setLayout(sizeof(_vertices[0]));
 
 
-		_locMVP = programState->getUniformLocation("u_MVPMatrix");
-		_locTexture = programState->getUniformLocation("u_texture");
+		_locMVP = programState->getUniformLocation(backend::UNIFORM_NAME_MVP_MATRIX);
+		_locTexture = programState->getUniformLocation(backend::UNIFORM_NAME_TEXTURE);
 	}
 
 	void SkeletonBatch::update(float delta) {
diff --git a/spine-cpp/spine-cpp/src/spine/SkeletonJson.cpp b/spine-cpp/spine-cpp/src/spine/SkeletonJson.cpp
index 90f88b254..b6912ed85 100644
--- a/spine-cpp/spine-cpp/src/spine/SkeletonJson.cpp
+++ b/spine-cpp/spine-cpp/src/spine/SkeletonJson.cpp
@@ -512,43 +512,43 @@ SkeletonData *SkeletonJson::readSkeletonData(const char *json) {
 				skeletonData->_defaultSkin = skin;
 			}
 
-			for (attachmentsMap = Json::getItem(skinMap,
-												"attachments")
-										  ->_child;
-				 attachmentsMap; attachmentsMap = attachmentsMap->_next) {
-				SlotData *slot = skeletonData->findSlot(attachmentsMap->_name);
-				Json *attachmentMap;
+			Json *attachments = Json::getItem(skinMap, "attachments");
+			if (attachments)
+				for (attachmentsMap = attachments->_child;
+					 attachmentsMap; attachmentsMap = attachmentsMap->_next) {
+					SlotData *slot = skeletonData->findSlot(attachmentsMap->_name);
+					Json *attachmentMap;
 
-				for (attachmentMap = attachmentsMap->_child; attachmentMap; attachmentMap = attachmentMap->_next) {
-					Attachment *attachment = NULL;
-					const char *skinAttachmentName = attachmentMap->_name;
-					const char *attachmentName = Json::getString(attachmentMap, "name", skinAttachmentName);
-					const char *attachmentPath = Json::getString(attachmentMap, "path", attachmentName);
-					const char *color;
-					Json *entry;
+					for (attachmentMap = attachmentsMap->_child; attachmentMap; attachmentMap = attachmentMap->_next) {
+						Attachment *attachment = NULL;
+						const char *skinAttachmentName = attachmentMap->_name;
+						const char *attachmentName = Json::getString(attachmentMap, "name", skinAttachmentName);
+						const char *attachmentPath = Json::getString(attachmentMap, "path", attachmentName);
+						const char *color;
+						Json *entry;
 
-					const char *typeString = Json::getString(attachmentMap, "type", "region");
-					AttachmentType type;
-					if (strcmp(typeString, "region") == 0) type = AttachmentType_Region;
-					else if (strcmp(typeString, "mesh") == 0)
-						type = AttachmentType_Mesh;
-					else if (strcmp(typeString, "linkedmesh") == 0)
-						type = AttachmentType_Linkedmesh;
-					else if (strcmp(typeString, "boundingbox") == 0)
-						type = AttachmentType_Boundingbox;
-					else if (strcmp(typeString, "path") == 0)
-						type = AttachmentType_Path;
-					else if (strcmp(typeString, "clipping") == 0)
-						type = AttachmentType_Clipping;
-					else if (strcmp(typeString, "point") == 0)
-						type = AttachmentType_Point;
-					else {
-						delete skeletonData;
-						setError(root, "Unknown attachment type: ", typeString);
-						return NULL;
-					}
+						const char *typeString = Json::getString(attachmentMap, "type", "region");
+						AttachmentType type;
+						if (strcmp(typeString, "region") == 0) type = AttachmentType_Region;
+						else if (strcmp(typeString, "mesh") == 0)
+							type = AttachmentType_Mesh;
+						else if (strcmp(typeString, "linkedmesh") == 0)
+							type = AttachmentType_Linkedmesh;
+						else if (strcmp(typeString, "boundingbox") == 0)
+							type = AttachmentType_Boundingbox;
+						else if (strcmp(typeString, "path") == 0)
+							type = AttachmentType_Path;
+						else if (strcmp(typeString, "clipping") == 0)
+							type = AttachmentType_Clipping;
+						else if (strcmp(typeString, "point") == 0)
+							type = AttachmentType_Point;
+						else {
+							delete skeletonData;
+							setError(root, "Unknown attachment type: ", typeString);
+							return NULL;
+						}
 
-					switch (type) {
+						switch (type) {
 						case AttachmentType_Region: {
 							Sequence *sequence = readSequence(Json::getItem(attachmentMap, "sequence"));
 							attachment = _attachmentLoader->newRegionAttachment(*skin, attachmentName, attachmentPath, sequence);
@@ -632,8 +632,8 @@ SkeletonData *SkeletonJson::readSkeletonData(const char *json) {
 								bool inheritTimelines = Json::getInt(attachmentMap, "timelines", 1) ? true : false;
 								LinkedMesh *linkedMesh = new (__FILE__, __LINE__) LinkedMesh(mesh,
 																							 String(Json::getString(
-																									 attachmentMap,
-																									 "skin", 0)),
+																										attachmentMap,
+																										"skin", 0)),
 																							 slot->getIndex(),
 																							 String(entry->_valueString),
 																							 inheritTimelines);
@@ -661,7 +661,7 @@ SkeletonData *SkeletonJson::readSkeletonData(const char *json) {
 							int vertexCount = 0;
 							pathAttatchment->_closed = Json::getInt(attachmentMap, "closed", 0) ? true : false;
 							pathAttatchment->_constantSpeed = Json::getInt(attachmentMap, "constantSpeed", 1) ? true
-																											  : false;
+								: false;
 							vertexCount = Json::getInt(attachmentMap, "vertexCount", 0);
 							readVertices(attachmentMap, pathAttatchment, vertexCount << 1);
 
@@ -704,11 +704,11 @@ SkeletonData *SkeletonJson::readSkeletonData(const char *json) {
 							_attachmentLoader->configureAttachment(attachment);
 							break;
 						}
-					}
+						}
 
-					skin->setAttachment(slot->getIndex(), skinAttachmentName, attachment);
+						skin->setAttachment(slot->getIndex(), skinAttachmentName, attachment);
+					}
 				}
-			}
 		}
 	}