fix crash with realloc call being incorrect

- concat gradients and applying a single one does not work for some reason, however, applying each one individually into the context works

Framework/IJSVG/IJSVG.modulemap

@@ -0,0 +1,5 @@
+framework module IJSVG {
+    umbrella header "IJSVGUmbrella.h"
+    export *
+    module * { export * } 
+}

Framework/IJSVG/IJSVG.xcodeproj/project.pbxproj

@@ -3,7 +3,7 @@
 	archiveVersion = 1;
 	classes = {
 	};
-	objectVersion = 50;
+	objectVersion = 54;
 	objects = {
 
 /* Begin PBXBuildFile section */
@@ -19,6 +19,8 @@
 		5910A9A728427AD600BD1F03 /* IJSVGMask.m in Sources */ = {isa = PBXBuildFile; fileRef = 5910A9A528427AD600BD1F03 /* IJSVGMask.m */; };
 		5910A9AA284377D600BD1F03 /* IJSVGClipPath.h in Headers */ = {isa = PBXBuildFile; fileRef = 5910A9A8284377D600BD1F03 /* IJSVGClipPath.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		5910A9AB284377D600BD1F03 /* IJSVGClipPath.m in Sources */ = {isa = PBXBuildFile; fileRef = 5910A9A9284377D600BD1F03 /* IJSVGClipPath.m */; };
+		5919111E28C7F1160047791B /* IJSVGBitFlags.h in Headers */ = {isa = PBXBuildFile; fileRef = 5919111C28C7F1160047791B /* IJSVGBitFlags.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		5919111F28C7F1160047791B /* IJSVGBitFlags.m in Sources */ = {isa = PBXBuildFile; fileRef = 5919111D28C7F1160047791B /* IJSVGBitFlags.m */; };
 		5919E65723F47FF60051873A /* IJSVGUnitRect.h in Headers */ = {isa = PBXBuildFile; fileRef = 5919E65523F47FF60051873A /* IJSVGUnitRect.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		5919E65823F47FF60051873A /* IJSVGUnitRect.m in Sources */ = {isa = PBXBuildFile; fileRef = 5919E65623F47FF60051873A /* IJSVGUnitRect.m */; };
 		5919E65B23F480330051873A /* IJSVGUnitPoint.h in Headers */ = {isa = PBXBuildFile; fileRef = 5919E65923F480330051873A /* IJSVGUnitPoint.h */; settings = {ATTRIBUTES = (Public, ); }; };
@@ -36,6 +38,7 @@
 		59557320286C643900156047 /* IJSVGTileLayer.m in Sources */ = {isa = PBXBuildFile; fileRef = 5955731E286C643900156047 /* IJSVGTileLayer.m */; };
 		595BA91C280EB29B00AD1C89 /* IJSVGFilterLayer.h in Headers */ = {isa = PBXBuildFile; fileRef = 595BA91A280EB29B00AD1C89 /* IJSVGFilterLayer.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		595BA91D280EB29B00AD1C89 /* IJSVGFilterLayer.m in Sources */ = {isa = PBXBuildFile; fileRef = 595BA91B280EB29B00AD1C89 /* IJSVGFilterLayer.m */; };
+		595FD12F29EC56BA00666897 /* IJSVGUmbrella.h in Headers */ = {isa = PBXBuildFile; fileRef = 595FD12E29EC56BA00666897 /* IJSVGUmbrella.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		5978C46A280A241200D25296 /* IJSVGRootLayer.h in Headers */ = {isa = PBXBuildFile; fileRef = 5978C468280A241200D25296 /* IJSVGRootLayer.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		5978C46B280A241200D25296 /* IJSVGRootLayer.m in Sources */ = {isa = PBXBuildFile; fileRef = 5978C469280A241200D25296 /* IJSVGRootLayer.m */; };
 		599EB4D3238FF570004CB6BC /* libobjc.tbd in Frameworks */ = {isa = PBXBuildFile; fileRef = 599EB4D2238FF535004CB6BC /* libobjc.tbd */; };
@@ -43,6 +46,8 @@
 		59A24EBD23F480EA0090C374 /* IJSVGUnitSize.m in Sources */ = {isa = PBXBuildFile; fileRef = 59A24EBB23F480EA0090C374 /* IJSVGUnitSize.m */; };
 		59AC865A2810156B00CD5685 /* IJSVGThreadManager.h in Headers */ = {isa = PBXBuildFile; fileRef = 59AC86582810156B00CD5685 /* IJSVGThreadManager.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		59AC865B2810156B00CD5685 /* IJSVGThreadManager.m in Sources */ = {isa = PBXBuildFile; fileRef = 59AC86592810156B00CD5685 /* IJSVGThreadManager.m */; };
+		59DB84E028C9F70000A9696A /* IJSVGBitFlags64.h in Headers */ = {isa = PBXBuildFile; fileRef = 59DB84DE28C9F70000A9696A /* IJSVGBitFlags64.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		59DB84E128C9F70000A9696A /* IJSVGBitFlags64.m in Sources */ = {isa = PBXBuildFile; fileRef = 59DB84DF28C9F70000A9696A /* IJSVGBitFlags64.m */; };
 		59E6690D287D6C810085EDF5 /* IJSVGFeatureFlag.h in Headers */ = {isa = PBXBuildFile; fileRef = 59E6690B287D6C810085EDF5 /* IJSVGFeatureFlag.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		59E6690E287D6C810085EDF5 /* IJSVGFeatureFlag.m in Sources */ = {isa = PBXBuildFile; fileRef = 59E6690C287D6C810085EDF5 /* IJSVGFeatureFlag.m */; };
 		59E7CFAF23B148600077D599 /* IJSVGCommandParser.h in Headers */ = {isa = PBXBuildFile; fileRef = 59E7CFAD23B148600077D599 /* IJSVGCommandParser.h */; settings = {ATTRIBUTES = (Public, ); }; };
@@ -160,6 +165,8 @@
 		59FCC09527F2394D00BB924E /* IJSVGRootNode.m in Sources */ = {isa = PBXBuildFile; fileRef = 59FCC09327F2394D00BB924E /* IJSVGRootNode.m */; };
 		59FDBF0027F3454800AF7038 /* IJSVGColorNode.h in Headers */ = {isa = PBXBuildFile; fileRef = 59FDBEFE27F3454800AF7038 /* IJSVGColorNode.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		59FDBF0127F3454800AF7038 /* IJSVGColorNode.m in Sources */ = {isa = PBXBuildFile; fileRef = 59FDBEFF27F3454800AF7038 /* IJSVGColorNode.m */; };
+		59FE8E4328C7E70800AB38B3 /* IJSVGStop.m in Sources */ = {isa = PBXBuildFile; fileRef = 59FE8E4128C7E70800AB38B3 /* IJSVGStop.m */; };
+		59FE8E4428C7E70800AB38B3 /* IJSVGStop.h in Headers */ = {isa = PBXBuildFile; fileRef = 59FE8E4228C7E70800AB38B3 /* IJSVGStop.h */; settings = {ATTRIBUTES = (Public, ); }; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -175,6 +182,8 @@
 		5910A9A528427AD600BD1F03 /* IJSVGMask.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = IJSVGMask.m; sourceTree = "<group>"; };
 		5910A9A8284377D600BD1F03 /* IJSVGClipPath.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = IJSVGClipPath.h; sourceTree = "<group>"; };
 		5910A9A9284377D600BD1F03 /* IJSVGClipPath.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = IJSVGClipPath.m; sourceTree = "<group>"; };
+		5919111C28C7F1160047791B /* IJSVGBitFlags.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = IJSVGBitFlags.h; sourceTree = "<group>"; };
+		5919111D28C7F1160047791B /* IJSVGBitFlags.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = IJSVGBitFlags.m; sourceTree = "<group>"; };
 		5919E65523F47FF60051873A /* IJSVGUnitRect.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = IJSVGUnitRect.h; sourceTree = "<group>"; };
 		5919E65623F47FF60051873A /* IJSVGUnitRect.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = IJSVGUnitRect.m; sourceTree = "<group>"; };
 		5919E65923F480330051873A /* IJSVGUnitPoint.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = IJSVGUnitPoint.h; sourceTree = "<group>"; };
@@ -194,6 +203,8 @@
 		5955731E286C643900156047 /* IJSVGTileLayer.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = IJSVGTileLayer.m; sourceTree = "<group>"; };
 		595BA91A280EB29B00AD1C89 /* IJSVGFilterLayer.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = IJSVGFilterLayer.h; sourceTree = "<group>"; };
 		595BA91B280EB29B00AD1C89 /* IJSVGFilterLayer.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = IJSVGFilterLayer.m; sourceTree = "<group>"; };
+		595FD12E29EC56BA00666897 /* IJSVGUmbrella.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = IJSVGUmbrella.h; sourceTree = "<group>"; };
+		596AB830298854270013110A /* IJSVG.modulemap */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = "sourcecode.module-map"; path = IJSVG.modulemap; sourceTree = SOURCE_ROOT; };
 		5978C468280A241200D25296 /* IJSVGRootLayer.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = IJSVGRootLayer.h; sourceTree = "<group>"; };
 		5978C469280A241200D25296 /* IJSVGRootLayer.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = IJSVGRootLayer.m; sourceTree = "<group>"; };
 		599EB4D2238FF535004CB6BC /* libobjc.tbd */ = {isa = PBXFileReference; lastKnownFileType = "sourcecode.text-based-dylib-definition"; name = libobjc.tbd; path = usr/lib/libobjc.tbd; sourceTree = SDKROOT; };
@@ -201,6 +212,8 @@
 		59A24EBB23F480EA0090C374 /* IJSVGUnitSize.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = IJSVGUnitSize.m; sourceTree = "<group>"; };
 		59AC86582810156B00CD5685 /* IJSVGThreadManager.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = IJSVGThreadManager.h; sourceTree = "<group>"; };
 		59AC86592810156B00CD5685 /* IJSVGThreadManager.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = IJSVGThreadManager.m; sourceTree = "<group>"; };
+		59DB84DE28C9F70000A9696A /* IJSVGBitFlags64.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = IJSVGBitFlags64.h; sourceTree = "<group>"; };
+		59DB84DF28C9F70000A9696A /* IJSVGBitFlags64.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = IJSVGBitFlags64.m; sourceTree = "<group>"; };
 		59E6690B287D6C810085EDF5 /* IJSVGFeatureFlag.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = IJSVGFeatureFlag.h; sourceTree = "<group>"; };
 		59E6690C287D6C810085EDF5 /* IJSVGFeatureFlag.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = IJSVGFeatureFlag.m; sourceTree = "<group>"; };
 		59E7CFAD23B148600077D599 /* IJSVGCommandParser.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; name = IJSVGCommandParser.h; path = IJSVG/Source/Parsing/IJSVGCommandParser.h; sourceTree = SOURCE_ROOT; };
@@ -318,6 +331,8 @@
 		59FCC09327F2394D00BB924E /* IJSVGRootNode.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = IJSVGRootNode.m; sourceTree = "<group>"; };
 		59FDBEFE27F3454800AF7038 /* IJSVGColorNode.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = IJSVGColorNode.h; sourceTree = "<group>"; };
 		59FDBEFF27F3454800AF7038 /* IJSVGColorNode.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = IJSVGColorNode.m; sourceTree = "<group>"; };
+		59FE8E4128C7E70800AB38B3 /* IJSVGStop.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = IJSVGStop.m; sourceTree = "<group>"; };
+		59FE8E4228C7E70800AB38B3 /* IJSVGStop.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = IJSVGStop.h; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -449,6 +464,8 @@
 			isa = PBXGroup;
 			children = (
 				590AA093280DE648002BBE12 /* Filter Effects */,
+				59FE8E4228C7E70800AB38B3 /* IJSVGStop.h */,
+				59FE8E4128C7E70800AB38B3 /* IJSVGStop.m */,
 				59EB75CE23905F7200F5AE63 /* IJSVGForeignObject.h */,
 				59EB75C923905F7200F5AE63 /* IJSVGForeignObject.m */,
 				59EB759F23905F6E00F5AE63 /* IJSVGLinearGradient.h */,
@@ -516,6 +533,10 @@
 				5926079E287D6C1000E93B09 /* IJSVGFeatureFlags.m */,
 				59E6690B287D6C810085EDF5 /* IJSVGFeatureFlag.h */,
 				59E6690C287D6C810085EDF5 /* IJSVGFeatureFlag.m */,
+				5919111C28C7F1160047791B /* IJSVGBitFlags.h */,
+				5919111D28C7F1160047791B /* IJSVGBitFlags.m */,
+				59DB84DE28C9F70000A9696A /* IJSVGBitFlags64.h */,
+				59DB84DF28C9F70000A9696A /* IJSVGBitFlags64.m */,
 			);
 			path = Utils;
 			sourceTree = "<group>";
@@ -575,6 +596,7 @@
 		594CF471238FF38E009B251B /* IJSVG */ = {
 			isa = PBXGroup;
 			children = (
+				596AB830298854270013110A /* IJSVG.modulemap */,
 				59EB756423905F3100F5AE63 /* Source */,
 				594CF473238FF38E009B251B /* Info.plist */,
 			);
@@ -602,6 +624,7 @@
 				59EB757D23905F6C00F5AE63 /* IJSVGImageRep.m */,
 				59EB75CD23905F7200F5AE63 /* IJSVGView.h */,
 				59EB75C123905F7100F5AE63 /* IJSVGView.m */,
+				595FD12E29EC56BA00666897 /* IJSVGUmbrella.h */,
 			);
 			path = Core;
 			sourceTree = "<group>";
@@ -683,6 +706,7 @@
 				591A3E4D25CC91F800AD45B7 /* IJSVGParsing.h in Headers */,
 				59A24EBC23F480EA0090C374 /* IJSVGUnitSize.h in Headers */,
 				59EB764523905F7300F5AE63 /* IJSVGExporter.h in Headers */,
+				595FD12F29EC56BA00666897 /* IJSVGUmbrella.h in Headers */,
 				59F36508262F1ABB00BCE3FD /* IJSVGTraitedColor.h in Headers */,
 				59E7CFAF23B148600077D599 /* IJSVGCommandParser.h in Headers */,
 				59EB762823905F7300F5AE63 /* IJSVGCommandClose.h in Headers */,
@@ -704,7 +728,10 @@
 				5926079F287D6C1000E93B09 /* IJSVGFeatureFlags.h in Headers */,
 				59E6690D287D6C810085EDF5 /* IJSVGFeatureFlag.h in Headers */,
 				5910A9A628427AD600BD1F03 /* IJSVGMask.h in Headers */,
+				5919111E28C7F1160047791B /* IJSVGBitFlags.h in Headers */,
+				59FE8E4428C7E70800AB38B3 /* IJSVGStop.h in Headers */,
 				5955731F286C643900156047 /* IJSVGTileLayer.h in Headers */,
+				59DB84E028C9F70000A9696A /* IJSVGBitFlags64.h in Headers */,
 				59EB760B23905F7300F5AE63 /* IJSVGStyleSheetSelector.h in Headers */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -736,7 +763,8 @@
 		594CF466238FF38E009B251B /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 1220;
+				BuildIndependentTargetsInParallel = YES;
+				LastUpgradeCheck = 1600;
 				ORGANIZATIONNAME = "Curtis Hard";
 				TargetAttributes = {
 					594CF46E238FF38E009B251B = {
@@ -778,6 +806,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				592607A0287D6C1000E93B09 /* IJSVGFeatureFlags.m in Sources */,
+				59FE8E4328C7E70800AB38B3 /* IJSVGStop.m in Sources */,
 				59EB763123905F7300F5AE63 /* IJSVGText.m in Sources */,
 				59A24EBD23F480EA0090C374 /* IJSVGUnitSize.m in Sources */,
 				59EB760223905F7300F5AE63 /* IJSVGCommandVerticalLine.m in Sources */,
@@ -790,6 +819,7 @@
 				590AA097280DE668002BBE12 /* IJSVGFilterEffectGaussianBlur.m in Sources */,
 				59F36509262F1ABB00BCE3FD /* IJSVGTraitedColor.m in Sources */,
 				59EB760123905F7300F5AE63 /* IJSVGLayerTree.m in Sources */,
+				59DB84E128C9F70000A9696A /* IJSVGBitFlags64.m in Sources */,
 				59EB763A23905F7300F5AE63 /* IJSVGForeignObject.m in Sources */,
 				59E6690E287D6C810085EDF5 /* IJSVGFeatureFlag.m in Sources */,
 				59EB761123905F7300F5AE63 /* IJSVGCommand.m in Sources */,
@@ -807,6 +837,7 @@
 				59E7CFB023B148600077D599 /* IJSVGCommandParser.m in Sources */,
 				5910A9AB284377D600BD1F03 /* IJSVGClipPath.m in Sources */,
 				59EB760723905F7300F5AE63 /* IJSVGNode.m in Sources */,
+				5919111F28C7F1160047791B /* IJSVGBitFlags.m in Sources */,
 				5919E65C23F480330051873A /* IJSVGUnitPoint.m in Sources */,
 				59EB75E923905F7300F5AE63 /* IJSVGStringAdditions.m in Sources */,
 				59FDBF0127F3454800AF7038 /* IJSVGColorNode.m in Sources */,
@@ -892,9 +923,12 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = NO;
 				CURRENT_PROJECT_VERSION = 1;
+				DEAD_CODE_STRIPPING = YES;
 				DEBUG_INFORMATION_FORMAT = dwarf;
+				DEFINES_MODULE = YES;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				GCC_DYNAMIC_NO_PIC = NO;
 				GCC_NO_COMMON_BLOCKS = YES;
@@ -910,10 +944,15 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 10.13;
+				MACOSX_DEPLOYMENT_TARGET = "$(RECOMMENDED_MACOSX_DEPLOYMENT_TARGET)";
+				MODULEMAP_FILE = IJSVG.modulemap;
+				MODULE_VERIFIER_SUPPORTED_LANGUAGES = "objective-c objective-c++";
+				MODULE_VERIFIER_SUPPORTED_LANGUAGE_STANDARDS = "gnu11 gnu++14";
 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
 				MTL_FAST_MATH = YES;
 				ONLY_ACTIVE_ARCH = YES;
+				OTHER_LDFLAGS = "-Wl,-no_warn_duplicate_libraries";
+				PRODUCT_MODULE_NAME = IJSVG;
 				SDKROOT = macosx;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -955,9 +994,13 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = NO;
 				CURRENT_PROJECT_VERSION = 1;
+				DEAD_CODE_STRIPPING = YES;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
+				DEFINES_MODULE = YES;
+				ENABLE_MODULE_VERIFIER = YES;
 				ENABLE_NS_ASSERTIONS = NO;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				GCC_NO_COMMON_BLOCKS = YES;
 				GCC_PREFIX_HEADER = "";
@@ -967,9 +1010,14 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 10.13;
+				MACOSX_DEPLOYMENT_TARGET = "$(RECOMMENDED_MACOSX_DEPLOYMENT_TARGET)";
+				MODULEMAP_FILE = IJSVG.modulemap;
+				MODULE_VERIFIER_SUPPORTED_LANGUAGES = "objective-c objective-c++";
+				MODULE_VERIFIER_SUPPORTED_LANGUAGE_STANDARDS = "gnu11 gnu++14";
 				MTL_ENABLE_DEBUG_INFO = NO;
 				MTL_FAST_MATH = YES;
+				OTHER_LDFLAGS = "-Wl,-no_warn_duplicate_libraries";
+				PRODUCT_MODULE_NAME = IJSVG;
 				SDKROOT = macosx;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -982,10 +1030,11 @@
 				CLANG_ENABLE_OBJC_ARC = YES;
 				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CODE_SIGN_IDENTITY = "";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
 				CURRENT_PROJECT_VERSION = 2;
-				DEFINES_MODULE = NO;
+				DEAD_CODE_STRIPPING = YES;
 				DEVELOPMENT_TEAM = 9KTR4W9XX6;
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
@@ -997,6 +1046,7 @@
 					"@executable_path/../Frameworks",
 					"@loader_path/Frameworks",
 				);
+				MACOSX_DEPLOYMENT_TARGET = 11.0;
 				MARKETING_VERSION = 2.2.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.iconjar.ijsvg;
 				PRODUCT_NAME = "$(TARGET_NAME:c99extidentifier)";
@@ -1010,10 +1060,11 @@
 				CLANG_ENABLE_OBJC_ARC = YES;
 				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CODE_SIGN_IDENTITY = "";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
 				CURRENT_PROJECT_VERSION = 2;
-				DEFINES_MODULE = NO;
+				DEAD_CODE_STRIPPING = YES;
 				DEVELOPMENT_TEAM = 9KTR4W9XX6;
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
@@ -1025,6 +1076,7 @@
 					"@executable_path/../Frameworks",
 					"@loader_path/Frameworks",
 				);
+				MACOSX_DEPLOYMENT_TARGET = 11.0;
 				MARKETING_VERSION = 2.2.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.iconjar.ijsvg;
 				PRODUCT_NAME = "$(TARGET_NAME:c99extidentifier)";

Framework/IJSVG/IJSVG.xcodeproj/xcshareddata/xcschemes/IJSVG.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1250"
+   LastUpgradeVersion = "1600"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

Framework/IJSVG/IJSVG/Source/Colors/IJSVGColor.m

@@ -247,8 +247,9 @@ CGFloat* IJSVGColorCSSHSLToHSB(CGFloat hue, CGFloat saturation, CGFloat lightnes
 
 + (BOOL)isNoneOrTransparent:(NSString*)string
 {
-    const char* str = string.lowercaseString.UTF8String;
-    return strcmp(str, "none") == 0 || strcmp(str, "transparent") == 0;
+    const char* str = string.UTF8String;
+    return IJSVGCharBufferCaseInsensitiveCompare(str, "none") == YES ||
+        IJSVGCharBufferCaseInsensitiveCompare(str, "transparent") == YES;
 }
 
 + (NSColor*)colorFromString:(NSString*)string
@@ -289,6 +290,16 @@ CGFloat* IJSVGColorCSSHSLToHSB(CGFloat hue, CGFloat saturation, CGFloat lightnes
             return nil;
         }
         
+        // Make sure we have actual floats within the parameters
+        NSInteger floatCount = 0;
+        CGFloat *params = [IJSVGUtils scanFloatsFromCString:method->parameters
+                                                       size:&floatCount];
+        (void)free(params), params = NULL;
+        if(floatCount < 3) {
+            return [self computeColorSpace:NSColor.blackColor];
+        }
+        
+        // Make sure the floats are not negative
         // parse the parameters
         NSString* parameters = [NSString stringWithUTF8String:method->parameters];
         NSArray* parts = [parameters ijsvg_componentsSeparatedByChars:","];
@@ -332,8 +343,8 @@ CGFloat* IJSVGColorCSSHSLToHSB(CGFloat hue, CGFloat saturation, CGFloat lightnes
     }
     
     // is simply a clear color, dont fill
-    if(strcmp(str, "none") == 0 ||
-        strcmp(str, "transparent") == 0) {
+    if(IJSVGCharBufferCompare(str, "none") == YES ||
+        IJSVGCharBufferCompare(str, "transparent") == YES) {
         (void)free(str), str = NULL;
         return nil;
     }

Framework/IJSVG/IJSVG/Source/Core/IJSVG.h

@@ -21,6 +21,7 @@
 #import <Foundation/Foundation.h>
 
 @class IJSVG;
+@class IJSVGParser;
 
 @interface IJSVG : NSObject <NSPasteboardWriting> {
 
@@ -30,6 +31,7 @@
     CGRect _viewBox;
     CGFloat _backingScale;
     IJSVGUnitSize* _intrinsicSize;
+    IJSVGParser* _parser;
 }
 
 // set this to be called when the layer is about to draw, it will call this
@@ -68,6 +70,7 @@
 - (IJSVGRootNode*)rootNode;
 - (CGRect)viewBox;
 - (CGSize)sizeWithDefaultSize:(CGSize)size;
+- (CGSize)sizeByMaintainingAspectRatioWithSize:(CGSize)aSize;
 - (NSString*)identifier;
 - (NSSet<IJSVG*>*)directDescendSVGs;
 - (IJSVGExporter*)exporterWithSize:(CGSize)size

Framework/IJSVG/IJSVG/Source/Core/IJSVG.m

@@ -9,6 +9,11 @@
 #import <IJSVG/IJSVG.h>
 #import <IJSVG/IJSVGExporter.h>
 #import <IJSVG/IJSVGTransaction.h>
+#import <IJSVG/IJSVGThreadManager.h>
+
+@interface IJSVG (private)
+@property (nonatomic, strong) IJSVGParser* parser;
+@end
 
 @implementation IJSVG
 
@@ -18,14 +23,19 @@
 
 - (void)dealloc
 {
-    // this can all be called on the background thread to be released
-    BOOL hasTransaction = IJSVGBeginTransaction();
-    // kill any memory that has been around
-    (void)(_layerTree), _layerTree = nil;
-    (void)(_rootLayer), _rootLayer = nil;
-    if(hasTransaction == YES) {
+    // thread manager will deal with this for us, but if we are main thread,
+    // we want to kick this off as soon as possible, or if the memory is set
+    // to quick.
+    IJSVGThreadManager* threadManager = IJSVGThreadManager.currentManager;
+    BOOL flag = IJSVGBeginTransaction();
+    _layerTree = nil;
+    _rootLayer = nil;
+    if(flag == YES) {
         IJSVGEndTransaction();
     }
+    
+    // tell the thread manager we are done with
+    [threadManager remove:self];
 }
 
 + (id)SVGNamed:(NSString*)string
@@ -168,10 +178,10 @@
         NSError* anError = nil;
 
         // create the group
-        IJSVGParser* parser = [IJSVGParser parserForFileURL:aURL
+        IJSVGParser *parser = [IJSVGParser parserForFileURL:aURL
                                                       error:&anError];
-        _rootNode = parser.rootNode;
-        
+        self.parser = parser;
+      
         [self _setupBasicInfoFromGroup];
         [self _setupBasicsFromAnyInitializer];
 
@@ -180,7 +190,7 @@
             if(error != NULL) {
                 *error = anError;
             }
-            (void)(self), self = nil;
+            self = nil;
             return nil;
         }
     }
@@ -193,6 +203,16 @@
                            error:nil];
 }
 
+- (void)setParser:(IJSVGParser*)parser {
+    _rootNode = [parser rootNodeWithSize:CGSizeZero];
+  
+    // if the rootNode has any form of relative units, we need to keep hold of
+    // the parser so when we render, we can ask for new values.
+    if(_rootNode.viewBoxContainsRelativeUnits) {
+      _parser = parser;
+    }
+}
+
 - (id)initWithSVGData:(NSData*)data
                 error:(NSError**)error
 {
@@ -218,9 +238,9 @@
 
         // setup the parser
         IJSVGParser* parser = [[IJSVGParser alloc] initWithSVGString:string
-                                                                error:&anError];
-        _rootNode = parser.rootNode;
-
+                                                               error:&anError];
+        self.parser = parser;
+      
         [self _setupBasicInfoFromGroup];
         [self _setupBasicsFromAnyInitializer];
 
@@ -229,7 +249,7 @@
             if(error != NULL) {
                 *error = anError;
             }
-            (void)(self), self = nil;
+            self = nil;
             return nil;
         }
     }
@@ -238,11 +258,9 @@
 
 - (void)performBlock:(dispatch_block_t)block
 {
-    BOOL hasTransaction = IJSVGBeginTransaction();
-    block();
-    if(hasTransaction == YES) {
-        IJSVGEndTransaction();
-    }
+    IJSVGPerformTransactionBlock(^{
+        block();
+    });
 }
 
 - (void)_setupBasicInfoFromGroup
@@ -273,6 +291,9 @@
         }
         return 1.f;
     };
+    
+    // tell the thread manager we exist
+    [IJSVGThreadManager.currentManager adopt:self];
 }
 
 - (BOOL)hasDynamicSize
@@ -458,11 +479,9 @@
     return image;
 }
 
-- (NSImage*)imageByMaintainingAspectRatioWithSize:(CGSize)aSize
-                                          flipped:(BOOL)flipped
-                                            error:(NSError**)error
+- (CGSize)sizeByMaintainingAspectRatioWithSize:(CGSize)aSize
 {
-    CGSize ogSize = _rootNode.intrinsicSize.value;
+    CGSize ogSize = [_rootNode.intrinsicSize computeValue:aSize];
     CGFloat ratio = 0.f;
     CGFloat imageWidth = ogSize.width;
     CGFloat imageHeight = ogSize.height;
@@ -473,8 +492,16 @@
     } else {
         ratio = maxHeight / imageHeight;
     }
-    ogSize.width = imageWidth * ratio;
-    ogSize.height = imageHeight * ratio;
+    ogSize.width = ceilf(imageWidth * ratio);
+    ogSize.height = ceilf(imageHeight * ratio);
+    return ogSize;
+}
+
+- (NSImage*)imageByMaintainingAspectRatioWithSize:(CGSize)aSize
+                                          flipped:(BOOL)flipped
+                                            error:(NSError**)error
+{
+    CGSize ogSize = [self sizeByMaintainingAspectRatioWithSize:aSize];
     return [self imageWithSize:ogSize
                        flipped:flipped
                          error:error];
@@ -576,11 +603,7 @@
              error:(NSError**)error
 {
     CGContextRef currentCGContext;
-    if(@available(macOS 10.10, *)) {
-        currentCGContext = NSGraphicsContext.currentContext.CGContext;
-    } else {
-        currentCGContext = NSGraphicsContext.currentContext.graphicsPort;
-    }
+    currentCGContext = NSGraphicsContext.currentContext.CGContext;
     return [self _drawInRect:rect
                      context:currentCGContext
                        error:error];
@@ -616,7 +639,7 @@
         }
     }
     CGContextSetInterpolationQuality(ctx, quality);
-    IJSVGRootLayer* rootLayer = self.rootLayer;
+    IJSVGRootLayer* rootLayer = [self rootLayerWithRect:rect];
     [rootLayer renderInContext:ctx
                       viewPort:rect
                   backingScale:backingScale
@@ -638,16 +661,35 @@
     return _layerTree;
 }
 
+- (IJSVGRootLayer*)rootLayerWithRect:(CGRect)rect {
+  // no parser, which means there is no need to recompute the value
+  if(_parser == nil || !_rootNode.viewBoxContainsRelativeUnits ||
+     CGSizeEqualToSize(_rootNode.clientSize, rect.size)) {
+    return self.rootLayer;
+  }
+  
+  // if we do have a parser, that means the node has relative values, lets recompute
+  __weak IJSVG* weakSelf = self;
+  [self performBlock:^{
+    IJSVG* strongSelf = weakSelf;
+    strongSelf->_rootNode = [strongSelf->_parser rootNodeWithSize:rect.size];
+    strongSelf->_rootLayer = [strongSelf.layerTree rootLayerForRootNode:strongSelf->_rootNode];
+  }];
+  return _rootLayer;
+}
+
 - (IJSVGRootLayer*)rootLayer
 {
-    if(_rootLayer == nil) {
-        __weak IJSVG* weakSelf = self;
-        [self performBlock:^{
-            IJSVG* strongSelf = weakSelf;
-            strongSelf->_rootLayer = [strongSelf.layerTree rootLayerForRootNode:strongSelf->_rootNode];
-        }];
-    }
+  if(_rootLayer != nil) {
     return _rootLayer;
+  }
+  
+  __weak IJSVG* weakSelf = self;
+  [self performBlock:^{
+      IJSVG* strongSelf = weakSelf;
+      strongSelf->_rootLayer = [strongSelf.layerTree rootLayerForRootNode:strongSelf->_rootNode];
+  }];
+  return _rootLayer;
 }
 
 - (CGFloat)backingScaleFactor
@@ -670,8 +712,8 @@
     __weak IJSVG* weakSelf = self;
     [self performBlock:^{
         IJSVG* strongSelf = weakSelf;
-        (void)(strongSelf->_rootLayer), strongSelf->_rootLayer = nil;
-        (void)(strongSelf->_layerTree), strongSelf->_layerTree = nil;
+        strongSelf->_rootLayer = nil;
+        strongSelf->_layerTree = nil;
     }];
 }
 

Framework/IJSVG/IJSVG/Source/Core/IJSVGUmbrella.h

@@ -0,0 +1,37 @@
+//
+//  IJSVGUmbrella.h
+//  IJSVG
+//
+//  Created by Curtis Hard on 16/04/2023.
+//  Copyright © 2023 Curtis Hard. All rights reserved.
+//
+
+#ifndef IJSVGUmbrella_h
+#define IJSVGUmbrella_h
+
+#import <IJSVG/IJSVG.h>
+#import <IJSVG/IJSVGCommandClose.h>
+#import <IJSVG/IJSVGCommandCurve.h>
+#import <IJSVG/IJSVGCommandEllipticalArc.h>
+#import <IJSVG/IJSVGCommandHorizontalLine.h>
+#import <IJSVG/IJSVGCommandLineTo.h>
+#import <IJSVG/IJSVGCommandMove.h>
+#import <IJSVG/IJSVGCommandQuadraticCurve.h>
+#import <IJSVG/IJSVGCommandSmoothQuadraticCurve.h>
+#import <IJSVG/IJSVGCommandSmoothCurve.h>
+#import <IJSVG/IJSVGCommandVerticalLine.h>
+#import <IJSVG/IJSVGExporterPathInstruction.h>
+#import <IJSVG/IJSVGFeatureFlag.h>
+#import <IJSVG/IJSVGFeatureFlags.h>
+#import <IJSVG/IJSVGFilterEffectGaussianBlur.h>
+#import <IJSVG/IJSVGFilterLayer.h>
+#import <IJSVG/IJSVGImageRep.h>
+#import <IJSVG/IJSVGMath.h>
+#import <IJSVG/IJSVGParsing.h>
+#import <IJSVG/IJSVGPatternLayer.h>
+#import <IJSVG/IJSVGStrokeLayer.h>
+#import <IJSVG/IJSVGThreadManager.h>
+#import <IJSVG/IJSVGView.h>
+#import <IJSVG/NSImage+IJSVGAdditions.h>
+
+#endif /* IJSVGUmbrella_h */

Framework/IJSVG/IJSVG/Source/Exporter/IJSVGExporter.h

@@ -90,6 +90,7 @@ const NSDictionary<NSString*, NSString*>* IJSVGDefaultAttributes(void);
     NSInteger _idCount;
     NSInteger _shortIdCount;
     BOOL _appliedXLink;
+    IJSVGThreadManager* _threadManager;
     
     struct {
         unsigned int identifierForElement: 1;

Framework/IJSVG/IJSVG/Source/Exporter/IJSVGExporter.m

@@ -21,6 +21,7 @@
 #import <IJSVG/IJSVGFilterLayer.h>
 #import <IJSVG/IJSVGTransformLayer.h>
 #import <IJSVG/IJSVGParser.h>
+#import <IJSVG/IJSVGThreadManager.h>
 
 @implementation IJSVGExporter
 
@@ -151,6 +152,7 @@ NSString* IJSVGHash(NSString* key)
         _options = options;
         _size = size;
         _svg = svg;
+        _threadManager = IJSVGThreadManager.currentManager;
 
         // defaults for floating point rounding, if any
         _floatingPointOptions = floatingPointOptions;
@@ -971,6 +973,15 @@ NSString* IJSVGHash(NSString* key)
     }
 }
 
+- (NSString*)transformAttributeStringForTransforms:(NSArray<IJSVGTransform*>*)transforms
+{
+    NSMutableArray* strings = [[NSMutableArray alloc] initWithCapacity:transforms.count];
+    for(IJSVGTransform* transform in transforms) {
+        [strings addObject:[self transformAttributeStringForTransform:transform.CGAffineTransform]];
+    }
+    return [strings componentsJoinedByString:@" "];
+}
+
 - (NSString*)transformAttributeStringForTransform:(CGAffineTransform)transform
 {
     if(IJSVGExporterHasOption(_options, IJSVGExporterOptionRoundTransforms) == YES) {
@@ -1180,9 +1191,9 @@ NSString* IJSVGHash(NSString* key)
     
     // apply any actual pattern transform from the node, only if the
     // actual transform has something
-    transform = IJSVGConcatTransforms(layer.patternNode.transforms);
-    if(CGAffineTransformIsIdentity(transform) == NO) {
-        dict[IJSVGAttributePatternTransform] = [self transformAttributeStringForTransform:transform];
+    NSArray<IJSVGTransform*>* transforms = layer.patternNode.transforms;
+    if(transforms.count != 0) {
+        dict[IJSVGAttributePatternTransform] = [self transformAttributeStringForTransforms:transforms];
     }
 
     IJSVGApplyAttributesToElement(dict, patternElement);
@@ -1315,8 +1326,7 @@ NSString* IJSVGHash(NSString* key)
     // work out the transform
     NSArray* transforms = layer.gradient.transforms;
     if(transforms.count != 0.f) {
-        CGAffineTransform transform = IJSVGConcatTransforms(transforms);
-        NSString* transformString = [self transformAttributeStringForTransform:transform];
+        NSString* transformString = [self transformAttributeStringForTransforms:transforms];
         IJSVGApplyAttributesToElement(@{
             IJSVGAttributeGradientTransform: transformString
         }, gradientElement);

Framework/IJSVG/IJSVG/Source/Layers/IJSVGFilterLayer.m

@@ -51,17 +51,13 @@
         (void)CGImageRelease(_image), _image = nil;
     }
     _image = [self.filter newImageByApplyFilterToLayer:_sublayer
-                                                 scale:1.f];
+                                                 scale:self.backingScaleFactor];
 }
 
 - (void)layoutSublayers
 {
-    CGFloat width = CGImageGetWidth(_image);
-    CGFloat height = CGImageGetHeight(_image);
     CGRect frame = _sublayer.innerBoundingBox;
-    _hostingLayer.frame = CGRectMake(frame.origin.x + (frame.size.width / 2.f - width / 2.f),
-                                     frame.origin.y + (frame.size.height / 2.f - height / 2.f),
-                                     width, height);
+    _hostingLayer.frame = frame;
     _hostingLayer.contents = (__bridge id)_image;
 }
 

Framework/IJSVG/IJSVG/Source/Layers/IJSVGLayer.m

@@ -396,13 +396,21 @@ intoUserSpaceUnitsFrom:(CALayer<IJSVGDrawableLayer>*)fromLayer
                              scale:(CGFloat)scale
 {
     CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceGray();
-    CGImageRef ref = [self newImageForLayer:layer
-                                    options:options
-                                 colorSpace:colorSpace
-                                 bitmapInfo:kCGImageAlphaNone
-                                      scale:scale];
+    CGImageRef alphaMask = [self newImageForLayer:layer
+                                          options:options
+                                       colorSpace:colorSpace
+                                       bitmapInfo:kCGImageAlphaNone
+                                            scale:scale];
+    // low - high pairs
+    const CGFloat colors[6] = {
+        0.f, 11.f,
+        0.f, 11.f,
+        0.f, 11.f
+    };
+    CGImageRef masked = CGImageCreateWithMaskingColors(alphaMask, colors);
+    CGImageRelease(alphaMask);
     CGColorSpaceRelease(colorSpace);
-    return ref;
+    return masked;
 }
 
 + (CGImageRef)newImageWithSize:(CGSize)size
@@ -428,8 +436,10 @@ intoUserSpaceUnitsFrom:(CALayer<IJSVGDrawableLayer>*)fromLayer
                     bitmapInfo:(uint32_t)bitmapInfo
                          scale:(CGFloat)scale
 {
+    CALayer<IJSVGDrawableLayer>* referenceLayer = layer.referencingLayer ?: layer;
     CGRect frame = layer.outerBoundingBox;
-    CGRect bounds = layer.innerBoundingBox;
+    CGRect bounds = CGRectApplyAffineTransform(layer.innerBoundingBox,
+                                               [self userSpaceTransformForLayer:referenceLayer]);
     CGContextRef offscreenContext = CGBitmapContextCreate(NULL,
                                                           ceilf(frame.size.width*scale),
                                                           ceilf(frame.size.height*scale),

Framework/IJSVG/IJSVG/Source/Nodes/IJSVGClipPath.m

@@ -11,6 +11,19 @@
 
 @implementation IJSVGClipPath
 
++ (IJSVGBitFlags*)allowedAttributes
+{
+    IJSVGBitFlags64* storage = [[IJSVGBitFlags64 alloc] init];
+    [storage addBits:[super allowedAttributes]];
+    [storage setBit:IJSVGNodeAttributeX];
+    [storage setBit:IJSVGNodeAttributeY];
+    [storage setBit:IJSVGNodeAttributeWidth];
+    [storage setBit:IJSVGNodeAttributeHeight];
+    [storage setBit:IJSVGNodeAttributeClipPathUnits];
+    [storage setBit:IJSVGNodeAttributeClipRule];
+    return storage;
+}
+
 - (void)setDefaults
 {
     self.units = IJSVGUnitObjectBoundingBox;

Framework/IJSVG/IJSVG/Source/Nodes/IJSVGFilterEffect.m

@@ -8,6 +8,7 @@
 
 #import <IJSVG/IJSVGFilterEffect.h>
 #import <IJSVG/IJSVGFilterEffectGaussianBlur.h>
+#import <IJSVG/IJSVGUtils.h>
 
 @implementation IJSVGFilterEffect
 
@@ -28,26 +29,26 @@ static NSDictionary<NSString*, Class>* _elementClassMap = nil;
 
 + (IJSVGFilterEffectSource)sourceForString:(NSString*)string
 {
-    const char* name = string.lowercaseString.UTF8String;
+    const char* name = string.UTF8String;
     if(name == NULL) {
         return IJSVGFilterEffectSourceGraphic;
     }
-    if(strcmp(name, "sourcegraphic") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(name, "sourcegraphic") == YES) {
         return IJSVGFilterEffectSourceGraphic;
     }
-    if(strcmp(name, "sourcealpha") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(name, "sourcealpha") == YES) {
         return IJSVGFilterEffectSourceAlpha;
     }
-    if(strcmp(name, "backgroundimage") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(name, "backgroundimage") == YES) {
         return IJSVGFilterEffectSourceBackgroundImage;
     }
-    if(strcmp(name, "backgroundalpha") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(name, "backgroundalpha") == YES) {
         return IJSVGFilterEffectSourceBackgroundAlpha;
     }
-    if(strcmp(name, "fillpaint") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(name, "fillpaint") == YES) {
         return IJSVGFilterEffectSourceFillPaint;
     }
-    if(strcmp(name, "strokepain") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(name, "strokepain") == YES) {
         return IJSVGFilterEffectSourceStrokePaint;
     }
     return IJSVGFilterEffectSourcePrimitiveReference;
@@ -59,13 +60,13 @@ static NSDictionary<NSString*, Class>* _elementClassMap = nil;
     if(name == NULL) {
         return IJSVGFilterEffectEdgeModeNone;
     }
-    if(strcmp(name, "none") == 0) {
+    if(IJSVGCharBufferCompare(name, "none") == YES) {
         return IJSVGFilterEffectEdgeModeNone;
     }
-    if(strcmp(name, "wrap") == 0) {
+    if(IJSVGCharBufferCompare(name, "wrap") == YES) {
         return IJSVGFilterEffectEdgeModeWrap;
     }
-    if(strcmp(name, "duplicate") == 0) {
+    if(IJSVGCharBufferCompare(name, "duplicate") == YES) {
         return IJSVGFilterEffectEdgeModeDuplicate;
     }
     return IJSVGFilterEffectEdgeModeNone;

Framework/IJSVG/IJSVG/Source/Nodes/IJSVGGradient.m

@@ -11,6 +11,15 @@
 
 @implementation IJSVGGradient
 
++ (IJSVGBitFlags*)allowedAttributes
+{
+    IJSVGBitFlags64* storage = [[IJSVGBitFlags64 alloc] init];
+    [storage addBits:[super allowedAttributes]];
+    [storage setBit:IJSVGNodeAttributeGradientUnits];
+    [storage setBit:IJSVGNodeAttributeGradientTransform];
+    return storage;
+}
+
 - (void)dealloc
 {
     if(_locations != NULL) {

Framework/IJSVG/IJSVG/Source/Nodes/IJSVGGroup.m

@@ -7,6 +7,7 @@
 //
 
 #import <IJSVG/IJSVGGroup.h>
+#import <IJSVG/IJSVGImage.h>
 
 @implementation IJSVGGroup
 
@@ -18,11 +19,17 @@
     return self;
 }
 
++ (IJSVGBitFlags*)allowedAttributes
+{
+    IJSVGBitFlags64* storage = [[IJSVGBitFlags64 alloc] init];
+    [storage addBits:[super allowedAttributes]];
+    [storage addBits:[IJSVGPath allowedAttributes]];
+    [storage addBits:[IJSVGImage allowedAttributes]];
+    return storage;
+}
+
 - (void)prepareFromCopy
 {
-    if(_children != nil) {
-        (void)_children, _children = nil;
-    }
     _children = [[NSMutableArray alloc] init];
 }
 

Framework/IJSVG/IJSVG/Source/Nodes/IJSVGImage.m

@@ -17,6 +17,18 @@
     (void)(CGImageRelease(CGImage)), CGImage = nil;
 }
 
++ (IJSVGBitFlags*)allowedAttributes
+{
+    IJSVGBitFlags64* storage = [[IJSVGBitFlags64 alloc] init];
+    [storage addBits:[super allowedAttributes]];
+    [storage setBit:IJSVGNodeAttributeX];
+    [storage setBit:IJSVGNodeAttributeY];
+    [storage setBit:IJSVGNodeAttributeWidth];
+    [storage setBit:IJSVGNodeAttributeHeight];
+    [storage setBit:IJSVGNodeAttributePreserveAspectRatio];
+    return storage;
+}
+
 - (void)setDefaults
 {
     [super setDefaults];

Framework/IJSVG/IJSVG/Source/Nodes/IJSVGLinearGradient.m

@@ -12,6 +12,17 @@
 
 @implementation IJSVGLinearGradient
 
++ (IJSVGBitFlags*)allowedAttributes
+{
+    IJSVGBitFlags64* storage = [[IJSVGBitFlags64 alloc] init];
+    [storage addBits:[super allowedAttributes]];
+    [storage setBit:IJSVGNodeAttributeX1];
+    [storage setBit:IJSVGNodeAttributeX2];
+    [storage setBit:IJSVGNodeAttributeY1];
+    [storage setBit:IJSVGNodeAttributeY2];
+    return storage;
+}
+
 + (void)parseGradient:(NSXMLElement*)element
              gradient:(IJSVGLinearGradient*)aGradient
 {
@@ -42,7 +53,6 @@
 
     CGPoint gradientStartPoint = CGPointZero;
     CGPoint gradientEndPoint = CGPointZero;
-    CGAffineTransform selfTransform = IJSVGConcatTransforms(self.transforms);
     CGRect boundingBox = objectRect;
     
     // make sure we apply the absolute position to
@@ -64,8 +74,8 @@
     gradientEndPoint = CGPointMake([self.x2 computeValue:width],
                                      [self.y2 computeValue:height]);
     
-    // apply the gradient transform if there is one
-    CGContextConcatCTM(ctx, selfTransform);
+    // concat the gradient transform into the context
+    IJSVGConcatTransformsCTM(ctx, self.transforms);
     
     // draw the gradient
     CGGradientDrawingOptions options = kCGGradientDrawsBeforeStartLocation | kCGGradientDrawsAfterEndLocation;

Framework/IJSVG/IJSVG/Source/Nodes/IJSVGMask.m

@@ -11,6 +11,19 @@
 
 @implementation IJSVGMask
 
++ (IJSVGBitFlags*)allowedAttributes
+{
+    IJSVGBitFlags64* storage = [[IJSVGBitFlags64 alloc] init];
+    [storage addBits:[super allowedAttributes]];
+    [storage setBit:IJSVGNodeAttributeX];
+    [storage setBit:IJSVGNodeAttributeY];
+    [storage setBit:IJSVGNodeAttributeWidth];
+    [storage setBit:IJSVGNodeAttributeHeight];
+    [storage setBit:IJSVGNodeAttributeMaskUnits];
+    [storage setBit:IJSVGNodeAttributeMaskContentUnits];
+    return storage;
+}
+
 - (void)setDefaults
 {
     [super setDefaults];

Framework/IJSVG/IJSVG/Source/Nodes/IJSVGNode.h

@@ -9,6 +9,7 @@
 #import <IJSVG/IJSVGStyleSheetStyle.h>
 #import <IJSVG/IJSVGUnitLength.h>
 #import <IJSVG/IJSVGViewBox.h>
+#import <IJSVG/IJSVGBitFlags64.h>
 #import <AppKit/AppKit.h>
 #import <Foundation/Foundation.h>
 
@@ -24,9 +25,79 @@
 @class IJSVGFilter;
 @class IJSVGMask;
 @class IJSVGClipPath;
+@class IJSVGThreadManager;
 
 typedef void (^IJSVGNodeWalkHandler)(IJSVGNode* node, BOOL* allowChildNodes, BOOL* stop);
 
+typedef NS_ENUM(NSInteger, IJSVGNodeAttribute) {
+    IJSVGNodeAttributeVersion,
+    IJSVGNodeAttributeXMLNS,
+    IJSVGNodeAttributeXMLNSXlink,
+    IJSVGNodeAttributeViewBox,
+    IJSVGNodeAttributePreserveAspectRatio,
+    IJSVGNodeAttributeID,
+    IJSVGNodeAttributeClass,
+    IJSVGNodeAttributeX,
+    IJSVGNodeAttributeY,
+    IJSVGNodeAttributeWidth,
+    IJSVGNodeAttributeHeight,
+    IJSVGNodeAttributeOpacity,
+    IJSVGNodeAttributeStrokeOpacity,
+    IJSVGNodeAttributeStrokeWidth,
+    IJSVGNodeAttributeStrokeDashOffset,
+    IJSVGNodeAttributeFillOpacity,
+    IJSVGNodeAttributeClipPath,
+    IJSVGNodeAttributeClipPathUnits,
+    IJSVGNodeAttributeClipRule,
+    IJSVGNodeAttributeMask,
+    IJSVGNodeAttributeGradientUnits,
+    IJSVGNodeAttributePatternUnits,
+    IJSVGNodeAttributePatternContentUnits,
+    IJSVGNodeAttributePatternTransform,
+    IJSVGNodeAttributeMaskUnits,
+    IJSVGNodeAttributeMaskContentUnits,
+    IJSVGNodeAttributeTransform,
+    IJSVGNodeAttributeGradientTransform,
+    IJSVGNodeAttributeUnicode,
+    IJSVGNodeAttributeStrokeLineCap,
+    IJSVGNodeAttributeStrokeLineJoin,
+    IJSVGNodeAttributeStroke,
+    IJSVGNodeAttributeStrokeDashArray,
+    IJSVGNodeAttributeStrokeMiterLimit,
+    IJSVGNodeAttributeFill,
+    IJSVGNodeAttributeFillRule,
+    IJSVGNodeAttributeBlendMode,
+    IJSVGNodeAttributeDisplay,
+    IJSVGNodeAttributeStyle,
+    IJSVGNodeAttributeD,
+    IJSVGNodeAttributeXLink,
+    IJSVGNodeAttributeX1,
+    IJSVGNodeAttributeX2,
+    IJSVGNodeAttributeY1,
+    IJSVGNodeAttributeY2,
+    IJSVGNodeAttributeRX,
+    IJSVGNodeAttributeRY,
+    IJSVGNodeAttributeCX,
+    IJSVGNodeAttributeCY,
+    IJSVGNodeAttributeR,
+    IJSVGNodeAttributeFX,
+    IJSVGNodeAttributeFY,
+    IJSVGNodeAttributeFR,
+    IJSVGNodeAttributePoints,
+    IJSVGNodeAttributeOffset,
+    IJSVGNodeAttributeStopColor,
+    IJSVGNodeAttributeStopOpacity,
+    IJSVGNodeAttributeHref,
+    IJSVGNodeAttributeOverflow,
+    IJSVGNodeAttributeFilter,
+    IJSVGNodeAttributeStdDeviation,
+    IJSVGNodeAttributeIn,
+    IJSVGNodeAttributeEdgeMode,
+    IJSVGNodeAttributeMarker
+};
+
+static const int kIJSVGNodeAttributeStorageLength = 64;
+
 typedef NS_OPTIONS(NSInteger, IJSVGIntrinsicDimensions) {
     IJSVGIntrinsicDimensionNone = 0,
     IJSVGIntrinsicDimensionWidth = 1 << 1,
@@ -184,6 +255,8 @@ void IJSVGAssertPaintableObject(id object);
 @property (nonatomic, readonly) BOOL detachedFromParentNode;
 @property (nonatomic, readonly) IJSVGRootNode* rootNode;
 
++ (IJSVGBitFlags*)computedAllowedAttributes;
++ (IJSVGBitFlags*)allowedAttributes;
 
 + (void)walkNodeTree:(IJSVGNode*)node
              handler:(IJSVGNodeWalkHandler)handler;
@@ -211,11 +284,10 @@ containsNodesMatchingTraits:(IJSVGNodeTraits)traits;
 - (void)removeTraits:(IJSVGNodeTraits)traits;
 - (BOOL)matchesTraits:(IJSVGNodeTraits)traits;
 - (void)computeTraits;
-- (void)normalizeWithOffset:(CGPoint)offset;
 
 - (NSSet<IJSVGNode*>*)nodesMatchingTypes:(NSIndexSet*)types;
 
-- (instancetype)parentNodeMatchingClass:(Class)class;
-- (instancetype)rootNodeMatchingClass:(Class)class;
+- (instancetype)parentNodeMatchingClass:(Class)someClass;
+- (instancetype)rootNodeMatchingClass:(Class)someClass;
 
 @end

Framework/IJSVG/IJSVG/Source/Nodes/IJSVGNode.m

@@ -10,6 +10,7 @@
 #import <IJSVG/IJSVGGroup.h>
 #import <IJSVG/IJSVGUtils.h>
 #import <IJSVG/IJSVGRootNode.h>
+#import <IJSVG/IJSVGThreadManager.h>
 
 @implementation IJSVGNode
 
@@ -18,111 +19,143 @@
 
 - (void)dealloc
 {
-    (void)free(_strokeDashArray), _strokeDashArray = NULL;
+    if(_strokeDashArray != NULL) {
+        (void)free(_strokeDashArray), _strokeDashArray = NULL;
+    }
 }
 
 + (IJSVGNodeType)typeForString:(NSString*)string
                           kind:(NSXMLNodeKind)kind
 {
-    // possible fix for older os's that complain
-    if(string == nil || kind != NSXMLElementKind) {
+    // if string is nil, or its not a generic element or some text span
+    if(string == nil || (kind != NSXMLElementKind && kind != NSXMLTextKind)) {
         return IJSVGNodeTypeNotFound;
     }
     
-    const char* name = string.lowercaseString.UTF8String;
-    if(name == NULL) {
+    const char* nodeType = string.UTF8String;
+    if(nodeType == NULL) {
         return IJSVGNodeTypeNotFound;
     }
-    if(strcmp(name, "style") == 0) {
-        return IJSVGNodeTypeStyle;
-    }
-    if(strcmp(name, "switch") == 0) {
-        return IJSVGNodeTypeSwitch;
-    }
-    if(strcmp(name, "defs") == 0) {
-        return IJSVGNodeTypeDef;
-    }
-    if(strcmp(name, "g") == 0) {
+    
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "g") == YES) {
         return IJSVGNodeTypeGroup;
     }
-    if(strcmp(name, "path") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "path") == YES) {
         return IJSVGNodeTypePath;
     }
-    if(strcmp(name, "polygon") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "style") == YES) {
+        return IJSVGNodeTypeStyle;
+    }
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "switch") == YES) {
+        return IJSVGNodeTypeSwitch;
+    }
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "defs") == YES) {
+        return IJSVGNodeTypeDef;
+    }
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "polygon") == YES) {
         return IJSVGNodeTypePolygon;
     }
-    if(strcmp(name, "polyline") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "polyline") == YES) {
         return IJSVGNodeTypePolyline;
     }
-    if(strcmp(name, "rect") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "rect") == YES) {
         return IJSVGNodeTypeRect;
     }
-    if(strcmp(name, "line") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "line") == YES) {
         return IJSVGNodeTypeLine;
     }
-    if(strcmp(name, "circle") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "circle") == YES) {
         return IJSVGNodeTypeCircle;
     }
-    if(strcmp(name, "ellipse") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "ellipse") == YES) {
         return IJSVGNodeTypeEllipse;
     }
-    if(strcmp(name, "use") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "use") == YES) {
         return IJSVGNodeTypeUse;
     }
-    if(strcmp(name, "lineargradient") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "lineargradient") == YES) {
         return IJSVGNodeTypeLinearGradient;
     }
-    if(strcmp(name, "radialgradient") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "radialgradient") == YES) {
         return IJSVGNodeTypeRadialGradient;
     }
-    if(strcmp(name, "stop") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "stop") == YES) {
         return IJSVGNodeTypeStop;
     }
-    if(strcmp(name, "glyph") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "glyph") == YES) {
         return IJSVGNodeTypeGlyph;
     }
-    if(strcmp(name, "font") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "font") == YES) {
         return IJSVGNodeTypeFont;
     }
-    if(strcmp(name, "clippath") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "clippath") == YES) {
         return IJSVGNodeTypeClipPath;
     }
-    if(strcmp(name, "mask") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "mask") == YES) {
         return IJSVGNodeTypeMask;
     }
-    if(strcmp(name, "image") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "image") == YES) {
         return IJSVGNodeTypeImage;
     }
-    if(strcmp(name, "pattern") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "pattern") == YES) {
         return IJSVGNodeTypePattern;
     }
-    if(strcmp(name, "svg") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "svg") == YES) {
         return IJSVGNodeTypeSVG;
     }
-    if(strcmp(name, "text") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "text") == YES) {
         return IJSVGNodeTypeText;
     }
-    if(strcmp(name, "tspan") == 0 || kind == NSXMLTextKind) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "tspan") == YES || kind == NSXMLTextKind) {
         return IJSVGNodeTypeTextSpan;
     }
-    if(strcmp(name, "title") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "title") == YES) {
         return IJSVGNodeTypeTitle;
     }
-    if(strcmp(name, "desc") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "desc") == YES) {
         return IJSVGNodeTypeDesc;
     }
-    if(strcmp(name, "foreignobject") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "foreignobject") == YES) {
         return IJSVGNodeTypeForeignObject;
     }
-    if(strcmp(name, "filter") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "filter") == YES) {
         return IJSVGNodeTypeFilter;
     }
-    if(strcmp(name, "fegaussianblur") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(nodeType, "fegaussianblur") == YES) {
         return IJSVGNodeTypeFilterEffect;
     }
     return IJSVGNodeTypeUnknown;
 }
 
++ (IJSVGBitFlags*)computedAllowedAttributes
+{
+    static NSMutableDictionary<Class, IJSVGBitFlags*>* computed = nil;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        computed = [[NSMutableDictionary alloc] init];
+    });
+    
+    @synchronized (computed) {
+        IJSVGBitFlags* set = computed[self];
+        if(set == nil) {
+            set = [self allowedAttributes];
+            computed[(id<NSCopying>)self] = set;
+        }
+        return set;
+    }
+}
+
++ (IJSVGBitFlags*)allowedAttributes
+{
+    IJSVGBitFlags64* storage = [[IJSVGBitFlags64 alloc] init];
+    [storage setBit:IJSVGNodeAttributeStyle];
+    [storage setBit:IJSVGNodeAttributeClass];
+    [storage setBit:IJSVGNodeAttributeTransform];
+    [storage setBit:IJSVGNodeAttributeID];
+    [storage setBit:IJSVGNodeAttributeDisplay];
+    return storage;
+}
+
 + (BOOL)typeIsPathable:(IJSVGNodeType)type
 {
     return type == IJSVGNodeTypePath || type == IJSVGNodeTypeRect ||
@@ -626,17 +659,4 @@ containsNodesMatchingTraits:(IJSVGNodeTraits)traits
     return foundNode;
 }
 
-- (void)normalizeWithOffset:(CGPoint)offset
-{
-    // if an SVG has been asked to normalize, its root will give us an offset
-    // to transform by to shift everything based on the viewBox's origin, we can
-    // simply just create a translate transform and stick at first position.
-    NSMutableArray* transforms = self.transforms ?
-        self.transforms.mutableCopy : [[NSMutableArray alloc] init];
-    IJSVGTransform* transform = [IJSVGTransform transformByTranslatingX:-offset.x
-                                                                      y:-offset.y];
-    [transforms insertObject:transform atIndex:0];
-    self.transforms = transforms;
-}
-
 @end

Framework/IJSVG/IJSVG/Source/Nodes/IJSVGPath.m

@@ -11,6 +11,29 @@
 
 @implementation IJSVGPath
 
++ (IJSVGBitFlags*)allowedAttributes
+{
+    IJSVGBitFlags64* storage = [[IJSVGBitFlags64 alloc] init];
+    [storage addBits:[super allowedAttributes]];
+    [storage setBit:IJSVGNodeAttributeFill];
+    [storage setBit:IJSVGNodeAttributeFillOpacity];
+    [storage setBit:IJSVGNodeAttributeFillRule];
+    [storage setBit:IJSVGNodeAttributeX];
+    [storage setBit:IJSVGNodeAttributeY];
+    [storage setBit:IJSVGNodeAttributeStroke];
+    [storage setBit:IJSVGNodeAttributeStrokeWidth];
+    [storage setBit:IJSVGNodeAttributeStrokeOpacity];
+    [storage setBit:IJSVGNodeAttributeStrokeLineCap];
+    [storage setBit:IJSVGNodeAttributeStrokeLineJoin];
+    [storage setBit:IJSVGNodeAttributeStrokeDashArray];
+    [storage setBit:IJSVGNodeAttributeStrokeDashOffset];
+    [storage setBit:IJSVGNodeAttributeClipPath];
+    [storage setBit:IJSVGNodeAttributeMask];
+    [storage setBit:IJSVGNodeAttributeOpacity];
+    [storage setBit:IJSVGNodeAttributeBlendMode];
+    return storage;
+}
+
 + (void)recursivelyAddPathedNodesPaths:(NSArray<IJSVGNode*>*)nodes
                              transform:(CGAffineTransform)transform
                                 toPath:(CGMutablePathRef)mutPath

Framework/IJSVG/IJSVG/Source/Nodes/IJSVGPattern.m

@@ -12,6 +12,17 @@
 
 @implementation IJSVGPattern
 
++ (IJSVGBitFlags*)allowedAttributes
+{
+    IJSVGBitFlags64* storage = [[IJSVGBitFlags64 alloc] init];
+    [storage addBits:[super allowedAttributes]];
+    [storage setBit:IJSVGNodeAttributePatternTransform];
+    [storage setBit:IJSVGNodeAttributePatternUnits];
+    [storage setBit:IJSVGNodeAttributePatternContentUnits];
+    [storage setBit:IJSVGNodeAttributeViewBox];
+    return storage;
+}
+
 - (instancetype)init
 {
     if((self = [super init]) != nil) {

Framework/IJSVG/IJSVG/Source/Nodes/IJSVGRadialGradient.m

@@ -11,6 +11,19 @@
 
 @implementation IJSVGRadialGradient
 
++ (IJSVGBitFlags*)allowedAttributes
+{
+    IJSVGBitFlags64* storage = [[IJSVGBitFlags64 alloc] init];
+    [storage addBits:[super allowedAttributes]];
+    [storage setBit:IJSVGNodeAttributeFX];
+    [storage setBit:IJSVGNodeAttributeFY];
+    [storage setBit:IJSVGNodeAttributeFR];
+    [storage setBit:IJSVGNodeAttributeCX];
+    [storage setBit:IJSVGNodeAttributeCY];
+    [storage setBit:IJSVGNodeAttributeR];
+    return storage;
+}
+
 - (id)copyWithZone:(NSZone*)zone
 {
     IJSVGRadialGradient* grad = [super copyWithZone:zone];
@@ -85,16 +98,12 @@
                transform:(CGAffineTransform)absoluteTransform
 {
     CGContextSaveGState(ctx);
-    CGContextSetInterpolationQuality(ctx, kCGInterpolationLow);
     BOOL inUserSpace = self.units == IJSVGUnitUserSpaceOnUse;
     CGFloat radius = 0.f;
     CGPoint startPoint = CGPointZero;
     CGPoint gradientStartPoint = CGPointZero;
     CGPoint gradientEndPoint = CGPointZero;
     CGRect boundingBox = objectRect;
-
-    // transforms
-    CGAffineTransform selfTransform = IJSVGConcatTransforms(self.transforms);
     
     // compute size based on percentages
     CGFloat width = 0.f;
@@ -117,22 +126,20 @@
     CGFloat fx = [_fx computeValue:width];
     CGFloat fy = [_fy computeValue:height];
 
-    gradientEndPoint = CGPointMake(fx, fy);
     gradientStartPoint = startPoint;
+    gradientEndPoint = CGPointMake(fx, fy);
 
     // transform if width or height is not equal - this can only
     // be done if we are using objectBoundingBox
     if(inUserSpace == YES) {
-        CGFloat rad = 2.f * radius;
-        CGRect rect = CGRectMake(startPoint.x, startPoint.y, rad, rad);
-        radius = CGRectGetHeight(rect) / 2.f;
         CGContextConcatCTM(ctx, absoluteTransform);
     } else {
         CGContextConcatCTM(ctx, CGAffineTransformMakeScale(CGRectGetWidth(boundingBox),
                                                            CGRectGetHeight(boundingBox)));
     }
     
-    CGContextConcatCTM(ctx, selfTransform);
+    // concat the gradient transform into the context
+    IJSVGConcatTransformsCTM(ctx, self.transforms);
 
     // draw the gradient
     CGGradientDrawingOptions options = kCGGradientDrawsBeforeStartLocation | kCGGradientDrawsAfterEndLocation;

Framework/IJSVG/IJSVG/Source/Nodes/IJSVGRootNode.h

@@ -12,6 +12,8 @@
 
 @interface IJSVGRootNode : IJSVGGroup
 
+@property (nonatomic, assign) CGSize clientSize;
+@property (nonatomic, assign) BOOL viewBoxContainsRelativeUnits;
 @property (nonatomic, assign) IJSVGIntrinsicDimensions intrinsicDimensions;
 @property (nonatomic, strong) IJSVGUnitSize* intrinsicSize;
 @property (nonatomic, readonly) CGRect bounds;

Framework/IJSVG/IJSVG/Source/Nodes/IJSVGRootNode.m

@@ -7,9 +7,23 @@
 //
 
 #import <IJSVG/IJSVGRootNode.h>
+#import <IJSVG/IJSVGThreadManager.h>
 
 @implementation IJSVGRootNode
 
++ (IJSVGBitFlags*)allowedAttributes
+{
+    IJSVGBitFlags64* storage = [[IJSVGBitFlags64 alloc] init];
+    [storage addBits:[super allowedAttributes]];
+    [storage setBit:IJSVGNodeAttributeX];
+    [storage setBit:IJSVGNodeAttributeY];
+    [storage setBit:IJSVGNodeAttributeWidth];
+    [storage setBit:IJSVGNodeAttributeHeight];
+    [storage setBit:IJSVGNodeAttributePreserveAspectRatio];
+    [storage setBit:IJSVGNodeAttributeViewBox];
+    return storage;
+}
+
 - (instancetype)init
 {
     if((self = [super init]) != nil) {
@@ -32,7 +46,7 @@
 - (IJSVGRootNode *)rootNode
 {
     IJSVGRootNode* rootNode = nil;
-    if((rootNode = [super rootNode]) == self) {
+    if((rootNode = super.rootNode) == self) {
         IJSVGNode* parent = self.parentNode;
         if([parent isKindOfClass:IJSVGRootNode.class]) {
             return (IJSVGRootNode*)parent;
@@ -42,26 +56,4 @@
     return rootNode;
 }
 
-- (void)normalizeWithOffset:(CGPoint)offset
-{
-    for(IJSVGNode* node in self.children) {
-        [node normalizeWithOffset:offset];
-    }
-}
-
-- (void)postProcess
-{
-    // Some SVG's will have a viewBox such as 5, 5, 10, 10, given that
-    // we can zero out the origin and shift all its direct children by
-    // the viewBox's origin
-    if(IJSVGThreadManager.currentManager.featureFlags.viewBoxNormalization.enabled == YES) {
-        CGRect vBox = [self.viewBox computeValue:CGSizeZero];
-        if(CGPointEqualToPoint(vBox.origin, CGPointZero) == YES) {
-            return;
-        }
-        [self normalizeWithOffset:vBox.origin];
-        self.viewBox.origin = IJSVGUnitPoint.zeroPoint;
-    }
-}
-
 @end

Framework/IJSVG/IJSVG/Source/Nodes/IJSVGStop.h

@@ -0,0 +1,13 @@
+//
+//  IJSVGStop.h
+//  IJSVG
+//
+//  Created by Curtis Hard on 05/09/2022.
+//  Copyright © 2022 Curtis Hard. All rights reserved.
+//
+
+#import <IJSVG/IJSVG.h>
+
+@interface IJSVGStop : IJSVGNode
+
+@end

Framework/IJSVG/IJSVG/Source/Nodes/IJSVGStop.m

@@ -0,0 +1,23 @@
+//
+//  IJSVGStop.m
+//  IJSVG
+//
+//  Created by Curtis Hard on 05/09/2022.
+//  Copyright © 2022 Curtis Hard. All rights reserved.
+//
+
+#import "IJSVGStop.h"
+
+@implementation IJSVGStop
+
++ (IJSVGBitFlags*)allowedAttributes
+{
+    IJSVGBitFlags64* storage = [[IJSVGBitFlags64 alloc] init];
+    [storage addBits:[super allowedAttributes]];
+    [storage setBit:IJSVGNodeAttributeStopColor];
+    [storage setBit:IJSVGNodeAttributeStopOpacity];
+    [storage setBit:IJSVGNodeAttributeOffset];
+    return storage;
+}
+
+@end

Framework/IJSVG/IJSVG/Source/Parsing/IJSVGCommandParser.m

@@ -153,6 +153,16 @@ CGFloat* _Nullable IJSVGParsePathDataStreamSequence(const char* commandChars, NS
             // null value of the end of the string instead of nulling out
             // with memset \0 - huzzah!
             dataStream->charBuffer[bufferCount] = '\0';
+            
+            // lets check to make the buffer actually has a valid float, and
+            // not either just a sign or white space or some random char.
+            if(strlen(dataStream->charBuffer) == 1 && !VALID_DIGIT(dataStream->charBuffer[0])) {
+                isDecimal = false;
+                bufferCount = 0;
+                continue;
+            }
+            
+            // actually add the float into the buffer
             dataStream->floatBuffer[counter++] = IJSVGParseFloat(dataStream->charBuffer);
 
             // reset
@@ -166,7 +176,7 @@ CGFloat* _Nullable IJSVGParsePathDataStreamSequence(const char* commandChars, NS
     if(commandsFound != NULL) {
         *commandsFound = (NSInteger)round(counter / commandLength);
     }
-
+    
     // allocate the new buffer from memory
     CGFloat* floats = (CGFloat*)malloc(sizeof(CGFloat) * counter);
     memcpy(floats, dataStream->floatBuffer, counter * sizeof(CGFloat));

Framework/IJSVG/IJSVG/Source/Parsing/IJSVGParser.h

@@ -12,6 +12,7 @@
 #import <IJSVG/IJSVGForeignObject.h>
 #import <IJSVG/IJSVGGroup.h>
 #import <IJSVG/IJSVGColorNode.h>
+#import <IJSVG/IJSVGStop.h>
 #import <IJSVG/IJSVGImage.h>
 #import <IJSVG/IJSVGLinearGradient.h>
 #import <IJSVG/IJSVGPath.h>
@@ -26,7 +27,6 @@
 #import <IJSVG/IJSVGUtils.h>
 #import <IJSVG/IJSVGFilter.h>
 #import <IJSVG/IJSVGFilterEffect.h>
-#import <IJSVG/IJSVGThreadManager.h>
 #import <AppKit/AppKit.h>
 #import <Foundation/Foundation.h>
 
@@ -110,6 +110,14 @@ extern NSString* const IJSVGAttributeMarker;
 
 
 @class IJSVGParser;
+@class IJSVGThreadManager;
+
+typedef struct {
+    char* nodeType;
+} IJSVGParserMallocBuffers;
+
+IJSVGParserMallocBuffers* IJSVGParserMallocBuffersCreate(void);
+void IJSVGParserMallocBuffersFree(IJSVGParserMallocBuffers* buffers);
 
 @interface IJSVGParser : NSObject {
 
@@ -117,10 +125,13 @@ extern NSString* const IJSVGAttributeMarker;
     NSXMLDocument* _document;
     IJSVGPathDataStream* _commandDataStream;
     IJSVGStyleSheet* _styleSheet;
-    NSMapTable<IJSVGNode*, NSMutableDictionary<NSString*, NSXMLElement*>*>* _detachedElements;
+    NSMutableDictionary<NSString*, NSXMLElement*>* _detachedReferences;
+    IJSVGThreadManager* _threadManager;
+    CGSize _rootSize;
+    IJSVGRootNode* _rootNode;
 }
 
-@property (nonatomic, strong, readonly) IJSVGRootNode* rootNode;
+@property (nonatomic, assign) CGSize defaultSize;
 
 + (BOOL)isDataSVG:(NSData*)data;
 
@@ -133,4 +144,6 @@ extern NSString* const IJSVGAttributeMarker;
 + (IJSVGParser*)parserForFileURL:(NSURL*)aURL
                            error:(NSError**)error;
 
+- (IJSVGRootNode*)rootNodeWithSize:(CGSize)size;
+
 @end

Framework/IJSVG/IJSVG/Source/Rendering/IJSVGLayerTree.m

@@ -26,6 +26,7 @@
 #import <IJSVG/IJSVGUtils.h>
 #import <IJSVG/IJSVGTransformLayer.h>
 #import <IJSVG/IJSVGFilterLayer.h>
+#import <IJSVG/IJSVGThreadManager.h>
 
 @implementation IJSVGLayerTree
 
@@ -601,6 +602,16 @@
         maskingBounds.origin.x += maskBounds.origin.x;
         maskingBounds.origin.y += maskBounds.origin.y;
         maskingBounds = CGRectApplyAffineTransform(maskingBounds, userSpaceTransform);
+        
+        // we need to move all the layers back if they are into the userSpace
+        // coordinate system
+        for(CALayer<IJSVGDrawableLayer> *childLayer in maskLayer.sublayers) {
+          CGRect innerBoundingBox = childLayer.innerBoundingBox;
+          CGAffineTransform innerTransform = CGAffineTransformMakeTranslation(-innerBoundingBox.origin.x,
+                                                                              -innerBoundingBox.origin.y);
+          childLayer.frame = CGRectApplyAffineTransform(childLayer.frame, userSpaceTransform);
+          childLayer.frame = CGRectApplyAffineTransform(childLayer.frame, innerTransform);
+        }
     }
     
     if(maskNode.units == IJSVGUnitUserSpaceOnUse) {
@@ -767,6 +778,7 @@
     }
     parentLayer.affineTransform = identity;
     [parentLayer addSublayer:layer];
+    parentLayer.outerBoundingBox = [IJSVGLayer calculateFrameForSublayers:parentLayer.sublayers];
     return parentLayer;
 }
 

Framework/IJSVG/IJSVG/Source/Rendering/IJSVGStyle.m

@@ -17,9 +17,17 @@
         _lineJoinStyle = IJSVGLineJoinStyleNone;
         _lineWidth = IJSVGInheritedFloatValue;
         _miterLimit = IJSVGInheritedFloatValue;
-        _colors = [[IJSVGTraitedColorStorage alloc] init];
     }
     return self;
 }
 
+- (IJSVGTraitedColorStorage*)colors
+{
+    // this can be lazy as most users wont use this functionality
+    if(_colors == nil) {
+        _colors = [[IJSVGTraitedColorStorage alloc] init];
+    }
+    return _colors;
+}
+
 @end

Framework/IJSVG/IJSVG/Source/Utils/IJSVGBitFlags.h

@@ -0,0 +1,25 @@
+//
+//  IJSVGBitStorage.h
+//  IJSVG
+//
+//  Created by Curtis Hard on 06/09/2022.
+//  Copyright © 2022 Curtis Hard. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface IJSVGBitFlags : NSObject {
+
+@private
+    int* _storage;
+}
+
+@property (nonatomic, readonly) int length;
+@property (nonatomic, readonly) int* storage;
+
+- (id)initWithLength:(int)length;
+- (void)addBits:(IJSVGBitFlags*)storage;
+- (BOOL)bitIsSet:(int)bit;
+- (void)setBit:(int)bit;
+
+@end

Framework/IJSVG/IJSVG/Source/Utils/IJSVGBitFlags.m

@@ -0,0 +1,53 @@
+//
+//  IJSVGBitStorage.m
+//  IJSVG
+//
+//  Created by Curtis Hard on 06/09/2022.
+//  Copyright © 2022 Curtis Hard. All rights reserved.
+//
+
+#import "IJSVGBitFlags.h"
+
+@implementation IJSVGBitFlags
+
+- (void)dealloc
+{
+    if(_storage != NULL) {
+        (void)free(_storage), _storage = NULL;
+    }
+}
+
+- (id)initWithLength:(int)length
+{
+    if((self = [super init]) != nil) {
+        _length = length;
+        _storage = (int*)calloc(sizeof(int), length);
+    }
+    return self;
+}
+
+- (void)addBits:(IJSVGBitFlags*)storage
+{
+    int* ps = storage.storage;
+    int* ss = _storage;
+    for(int i = 0; i < storage.length; i++) {
+        int* current = ss++;
+        if(*ps++ == 1) {
+            *current = 1;
+        }
+    }
+}
+
+- (BOOL)bitIsSet:(int)bit
+{
+    return *(_storage + bit) == 1;
+}
+
+- (void)setBit:(int)bit
+{
+    *(_storage + bit) = 1;
+}
+
+
+
+@end

Framework/IJSVG/IJSVG/Source/Utils/IJSVGBitFlags64.h

@@ -0,0 +1,16 @@
+//
+//  IJSVGBitFlags64.h
+//  IJSVG
+//
+//  Created by Curtis Hard on 08/09/2022.
+//  Copyright © 2022 Curtis Hard. All rights reserved.
+//
+
+#import <IJSVG/IJSVGBitFlags.h>
+
+@interface IJSVGBitFlags64 : IJSVGBitFlags {
+@private
+    int64_t _storage64;
+}
+
+@end

Framework/IJSVG/IJSVG/Source/Utils/IJSVGBitFlags64.m

@@ -0,0 +1,40 @@
+//
+//  IJSVGBitFlags64.m
+//  IJSVG
+//
+//  Created by Curtis Hard on 08/09/2022.
+//  Copyright © 2022 Curtis Hard. All rights reserved.
+//
+
+#import "IJSVGBitFlags64.h"
+
+@implementation IJSVGBitFlags64
+
+- (instancetype)init
+{
+    if((self = [super init]) != nil) {
+        _storage64 = 0ULL;
+    }
+    return self;
+}
+
+- (void)addBits:(IJSVGBitFlags*)storage
+{
+    for(int i = 0; i < 64; i++) {
+        if([storage bitIsSet:i] == YES) {
+            [self setBit:i];
+        }
+    }
+}
+
+- (BOOL)bitIsSet:(int)bit
+{
+    return ((_storage64 >> bit) & 1ULL) == 1;
+}
+
+- (void)setBit:(int)bit
+{
+    _storage64 |= (1ULL << bit);
+}
+
+@end

Framework/IJSVG/IJSVG/Source/Utils/IJSVGParsing.m

@@ -94,7 +94,7 @@ IJSVGParsingStringMethod** IJSVGParsingMethodParseString(const char* string,
                 // now we can add
                 if(methodCount + 1 > currentBufferSize) {
                     currentBufferSize += defBufferSize;
-                    *methods = *(IJSVGParsingStringMethod**)realloc(methods, sizeof(IJSVGParsingStringMethod*)*currentBufferSize);
+                    methods = (IJSVGParsingStringMethod**)realloc(methods, sizeof(IJSVGParsingStringMethod*)*currentBufferSize);
                 }
                 methods[methodCount++] = method;
                 method = NULL;

Framework/IJSVG/IJSVG/Source/Utils/IJSVGThreadManager.h

@@ -12,21 +12,28 @@
 #import <IJSVG/IJSVGParsing.h>
 #import <IJSVG/IJSVGCommandParser.h>
 #import <IJSVG/IJSVGFeatureFlags.h>
+#import <IJSVG/IJSVG.h>
+#import <IJSVG/IJSVGParser.h>
 
 @interface IJSVGThreadManager : NSObject {
-    
 @private
     NSMutableDictionary* _userInfo;
+    NSHashTable* _allocedSVGs;
 }
 
 @property (nonatomic, readonly) IJSVGFeatureFlags* featureFlags;
 @property (nonatomic, readonly) NSThread* thread;
 @property (nonatomic, readonly) CIContext* CIContext;
 @property (nonatomic, readonly) IJSVGPathDataStream* pathDataStream;
- 
+
 + (IJSVGThreadManager*)managerForThread:(NSThread*)thread;
++ (IJSVGThreadManager*)managerForSVG:(IJSVG*)svg;
 + (IJSVGThreadManager*)currentManager;
 
+- (void)adopt:(IJSVG*)svg;
+- (void)remove:(IJSVG*)svg;
+- (BOOL)manages:(IJSVG*)svg;
+
 - (void)setUserInfoObject:(id)object
                    forKey:(id<NSCopying>)key;
 - (id)userInfoObjectForKey:(id<NSCopying>)key;

Framework/IJSVG/IJSVG/Source/Utils/IJSVGThreadManager.m

@@ -39,6 +39,21 @@ static NSMapTable<NSThread*, IJSVGThreadManager*>* managerMap;
     return manager;
 }
 
++ (IJSVGThreadManager*)managerForSVG:(IJSVG*)svg
+{
+    NSMapTable* map = [self mapTable];
+    IJSVGThreadManager* found = nil;
+    @synchronized (map) {
+        for(IJSVGThreadManager* manager in map) {
+            if([manager manages:svg] == YES) {
+                found = manager;
+                break;
+            }
+        }
+    }
+    return found;
+}
+
 + (IJSVGThreadManager *)currentManager
 {
     return [self managerForThread:NSThread.currentThread];
@@ -60,6 +75,10 @@ static NSMapTable<NSThread*, IJSVGThreadManager*>* managerMap;
         // setup the feature flags
         _featureFlags = [[IJSVGFeatureFlags alloc] init];
         
+        // hash table for the SVGs for this given thread
+        _allocedSVGs = [[NSHashTable alloc] initWithOptions:NSPointerFunctionsWeakMemory
+                                                   capacity:1];
+        
         // listen for teardown of the thread
         NSNotificationCenter* center = NSNotificationCenter.defaultCenter;
         [center addObserver:self
@@ -87,8 +106,31 @@ static NSMapTable<NSThread*, IJSVGThreadManager*>* managerMap;
     return _userInfo[key];
 }
 
+- (BOOL)manages:(IJSVG*)svg
+{
+    return [_allocedSVGs containsObject:svg];
+}
+
+- (void)adopt:(IJSVG*)svg
+{
+    if([self manages:svg] == YES) {
+        return;
+    }
+    [_allocedSVGs addObject:svg];
+}
+
+- (void)remove:(IJSVG*)svg
+{
+    [_allocedSVGs removeObject:svg];
+}
+
 - (void)tearDownFromThreadExit
 {
+    // it is important that we call a transaction commit
+    // at the end of the thread or any changes will cause a memory leak
+    IJSVGPerformTransactionBlock(^{
+        [self->_allocedSVGs removeAllObjects];
+    });
     NSMapTable* map = [self.class mapTable];
     @synchronized (map) {
         [map removeObjectForKey:_thread];

Framework/IJSVG/IJSVG/Source/Utils/IJSVGTransaction.h

@@ -12,3 +12,4 @@
 BOOL IJSVGIsMainThread(void);
 BOOL IJSVGBeginTransaction(void);
 void IJSVGEndTransaction(void);
+void IJSVGPerformTransactionBlock(dispatch_block_t _Nonnull block);

Framework/IJSVG/IJSVG/Source/Utils/IJSVGTransaction.m

@@ -6,10 +6,13 @@
 //  Copyright © 2017 Curtis Hard. All rights reserved.
 //
 
+#import <IJSVG/IJSVGThreadManager.h>
 #import <IJSVG/IJSVGTransaction.h>
 #import <AppKit/AppKit.h>
 
-BOOL IJSVGIsMainThread(void) { return NSThread.isMainThread; };
+BOOL IJSVGIsMainThread(void) {
+    return IJSVGThreadManager.currentManager.thread.isMainThread;
+};
 
 BOOL IJSVGBeginTransaction(void)
 {
@@ -20,12 +23,21 @@ BOOL IJSVGBeginTransaction(void)
     // of the catransaction for background composites
     [CATransaction begin];
     [CATransaction setDisableActions:YES];
-    [CATransaction lock];
+//    [CATransaction lock];
     return YES;
 };
 
 void IJSVGEndTransaction(void)
 {
-    [CATransaction unlock];
+//    [CATransaction unlock];
     [CATransaction commit];
 };
+
+void IJSVGPerformTransactionBlock(dispatch_block_t _Nonnull block)
+{
+    BOOL begin = IJSVGBeginTransaction();
+    block();
+    if(begin == YES) {
+        IJSVGEndTransaction();
+    }
+}

Framework/IJSVG/IJSVG/Source/Utils/IJSVGTransform.h

@@ -37,6 +37,7 @@ typedef NS_ENUM(NSInteger, IJSVGTransformCommand) {
 void IJSVGApplyTransform(NSArray<IJSVGTransform*>* transforms, IJSVGTransformApplyBlock block);
 BOOL IJSVGAffineTransformScalesAndTranslates(CGAffineTransform affineTransform);
 CGAffineTransform IJSVGConcatTransforms(NSArray<IJSVGTransform*>* transforms);
+void IJSVGConcatTransformsCTM(CGContextRef context, NSArray<IJSVGTransform*>* transforms);
 NSString* IJSVGTransformAttributeString(CGAffineTransform transform);
 
 + (NSArray<NSDictionary*>*)affineTransformToSVGTransformComponents:(CGAffineTransform)transform;

Framework/IJSVG/IJSVG/Source/Utils/IJSVGTransform.m

@@ -28,6 +28,13 @@
     return trans;
 }
 
+void IJSVGConcatTransformsCTM(CGContextRef context, NSArray<IJSVGTransform*>* transforms)
+{
+    IJSVGApplyTransform(transforms, ^(IJSVGTransform* transform) {
+        CGContextConcatCTM(context, transform.CGAffineTransform);
+    });
+}
+
 CGAffineTransform IJSVGConcatTransforms(NSArray<IJSVGTransform*>* transforms)
 {
     __block CGAffineTransform trans = CGAffineTransformIdentity;
@@ -87,29 +94,28 @@ BOOL IJSVGAffineTransformScalesAndTranslates(CGAffineTransform transform)
 
 + (IJSVGTransformCommand)commandForCommandCString:(char*)str
 {
-    IJSVGCharBufferToLower(str);
-    if(strcmp(str, "matrix") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(str, "matrix") == YES) {
         return IJSVGTransformCommandMatrix;
     }
-    if(strcmp(str, "translate") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(str, "translate") == YES) {
         return IJSVGTransformCommandTranslate;
     }
-    if(strcmp(str, "translatex") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(str, "translatex") == YES) {
         return IJSVGTransformCommandTranslateX;
     }
-    if(strcmp(str, "translatey") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(str, "translatey") == YES) {
         return IJSVGTransformCommandTranslateY;
     }
-    if(strcmp(str, "scale") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(str, "scale") == YES) {
         return IJSVGTransformCommandScale;
     }
-    if(strcmp(str, "skewx") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(str, "skewx") == YES) {
         return IJSVGTransformCommandSkewX;
     }
-    if(strcmp(str, "skewy") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(str, "skewy") == YES) {
         return IJSVGTransformCommandSkewY;
     }
-    if(strcmp(str, "rotate") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(str, "rotate") == YES) {
         return IJSVGTransformCommandRotate;
     }
     return IJSVGTransformCommandNotImplemented;

Framework/IJSVG/IJSVG/Source/Utils/IJSVGUnitLength.m

@@ -153,7 +153,7 @@
 
     // is inherit or just nothing
     size_t strl = strlen(chars);
-    if(strcmp(chars, "inherit") == 0 || strl == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(chars, "inherit") == YES || strl == 0) {
         (void)free(chars), chars = NULL;
         return nil;
     }
@@ -239,7 +239,7 @@
 
 - (NSString*)stringValue
 {
-    if(self.type == IJSVGUnitLengthTypePercentage) {
+    if(self.type == IJSVGUnitLengthTypePercentage && self.value != 0.f) {
         return [NSString stringWithFormat:@"%@%%",
                          IJSVGShortFloatString(self.value * 100.f)];
     }
@@ -248,7 +248,7 @@
 
 - (NSString*)stringValueWithFloatingPointOptions:(IJSVGFloatingPointOptions)options
 {
-    if(_type == IJSVGUnitLengthTypePercentage) {
+    if(_type == IJSVGUnitLengthTypePercentage && self.value != 0.f) {
         return [NSString stringWithFormat:@"%@%%",
                          IJSVGShortFloatStringWithOptions(_value * 100.f, options)];
     }

Framework/IJSVG/IJSVG/Source/Utils/IJSVGUnitSize.h

@@ -14,6 +14,7 @@
 @property (nonatomic, strong) IJSVGUnitLength* width;
 @property (nonatomic, strong) IJSVGUnitLength* height;
 @property (nonatomic, readonly) CGSize value;
+@property (nonatomic, readonly) BOOL isZeroSize;
 
 
 + (IJSVGUnitSize*)zeroSize;

Framework/IJSVG/IJSVG/Source/Utils/IJSVGUnitSize.m

@@ -38,6 +38,11 @@
     return size;
 }
 
+- (BOOL)isZeroSize
+{
+    return self.width.value == 0.f && self.height.value == 0.f;
+}
+
 - (void)convertUnitsToLengthType:(IJSVGUnitLengthType)lengthType
 {
     _width.type = _height.type = lengthType;

Framework/IJSVG/IJSVG/Source/Utils/IJSVGUtils.h

@@ -25,6 +25,9 @@ CGFloat IJSVGAngle(CGPoint a, CGPoint b);
 CGFloat IJSVGRadiansToDegrees(CGFloat radians);
 CGFloat IJSVGDegreesToRadians(CGFloat degrees);
 
+char IJSVGCharToLower(char c);
+BOOL IJSVGCharBufferCaseInsensitiveCompare(const char* str1, const char* str2);
+BOOL IJSVGCharBufferCompare(const char* str1, const char* str2);
 BOOL IJSVGCharBufferIsHEX(char* buffer);
 BOOL IJSVGCharBufferHasPrefix(char* pre, char* str);
 BOOL IJSVGCharBufferHasSuffix(char* s1, char* s2);

Framework/IJSVG/IJSVG/Source/Utils/IJSVGUtils.m

@@ -39,12 +39,12 @@ BOOL IJSVGCharBufferIsHEX(char* buffer) {
     return YES;
 }
 
-BOOL IJSVGCharBufferHasPrefix(char *str, char *pre)
+inline BOOL IJSVGCharBufferHasPrefix(char *str, char *pre)
 {
     return strncmp(pre, str, strlen(pre)) == 0;
 }
 
-BOOL IJSVGCharBufferHasSuffix(char* s1, char* s2)
+inline BOOL IJSVGCharBufferHasSuffix(char* s1, char* s2)
 {
     size_t slen = strlen(s1);
     size_t tlen = strlen(s2);
@@ -61,7 +61,7 @@ char* IJSVGTimmedCharBufferCreate(const char* buffer)
     while(length-1 > 0 && isspace(buffer[length-1])) {
         length--;
     }
-    while(isspace(buffer[start])) {
+    while(isspace(buffer[start]) && start < length) {
         start++;
     }
     char* chars = (char*)malloc(sizeof(char)*((length-start)+1) ?: sizeof(char));
@@ -83,10 +83,44 @@ void IJSVGTrimCharBuffer(char* buffer) {
     memmove(buffer, ptr, length+1);
 }
 
-void IJSVGCharBufferToLower(char* buffer)
+inline char IJSVGCharToLower(char c)
+{
+    if(c >= 'A' && c <= 'Z') {
+        return c - ('A' - 'a');
+    }
+    return c;
+}
+
+BOOL IJSVGCharBufferCaseInsensitiveCompare(const char* str1, const char* str2)
+{
+    if(str1 == str2) {
+        return YES;
+    }
+    
+    const char *p1 = str1;
+    const char *p2 = str2;
+    int result = 0;
+    
+    while((result = IJSVGCharToLower(*p1) - IJSVGCharToLower(*p2++)) == 0) {
+        if(*p1++ == '\0') {
+            break;
+        }
+    }
+    return result == 0;
+}
+
+inline BOOL IJSVGCharBufferCompare(const char* str1, const char* str2)
+{
+    if(str1[0] != str2[0]) {
+        return NO;
+    }
+    return strcmp(str1, str2) == 0;
+}
+
+inline void IJSVGCharBufferToLower(char* buffer)
 {
     for(char *p = buffer; *p; p++) {
-        *p = tolower(*p);
+        *p = IJSVGCharToLower(*p);
     }
 }
 
@@ -290,8 +324,7 @@ CGFloat IJSVGDegreesToRadians(CGFloat degrees)
     
     // what type of method is it?
     IJSVGParsingStringMethod* method = methods[0];
-    IJSVGCharBufferToLower(method->name);
-    if(strcmp(method->name, "url") != 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(method->name, "url") == NO) {
         (void)IJSVGParsingStringMethodsRelease(methods, count), methods = NULL;
         return nil;
     }

Framework/IJSVG/IJSVG/Source/Utils/IJSVGViewBox.m

@@ -85,14 +85,14 @@
         return IJSVGViewBoxMeetOrSliceUnknown;
     }
     
-    const char* name = string.lowercaseString.UTF8String;
+    const char* name = string.UTF8String;
     if(name == NULL) {
         return IJSVGViewBoxMeetOrSliceUnknown;
     }
-    if(strcmp(name, "meet") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(name, "meet") == YES) {
         return IJSVGViewBoxMeetOrSliceMeet;
     }
-    if(strcmp(name, "slice") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(name, "slice") == YES) {
         return IJSVGViewBoxMeetOrSliceSlice;
     }
     return IJSVGViewBoxMeetOrSliceUnknown;
@@ -104,38 +104,38 @@
         return IJSVGViewBoxAlignmentUnknown;
     }
     
-    const char* name = string.lowercaseString.UTF8String;
+    const char* name = string.UTF8String;
     if(name == NULL) {
         return IJSVGViewBoxAlignmentUnknown;
     }
-    if(strcmp(name, "none") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(name, "none") == YES) {
         return IJSVGViewBoxAlignmentNone;
     }
-    if(strcmp(name, "xminymin") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(name, "xminymin") == YES) {
         return IJSVGViewBoxAlignmentXMinYMin;
     }
-    if(strcmp(name, "xmidymin") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(name, "xmidymin") == YES) {
         return IJSVGViewBoxAlignmentXMidYMin;
     }
-    if(strcmp(name, "xmaxymin") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(name, "xmaxymin") == YES) {
         return IJSVGViewBoxAlignmentXMaxYMin;
     }
-    if(strcmp(name, "xminymid") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(name, "xminymid") == YES) {
         return IJSVGViewBoxAlignmentXMinYMid;
     }
-    if(strcmp(name, "xmidymid") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(name, "xmidymid") == YES) {
         return IJSVGViewBoxAlignmentXMidYMid;
     }
-    if(strcmp(name, "xmaxymid") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(name, "xmaxymid") == YES) {
         return IJSVGViewBoxAlignmentXMaxYMid;
     }
-    if(strcmp(name, "xminymax") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(name, "xminymax") == YES) {
         return IJSVGViewBoxAlignmentXMinYMax;
     }
-    if(strcmp(name, "xmidymax") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(name, "xmidymax") == YES) {
         return IJSVGViewBoxAlignmentXMidYMax;
     }
-    if(strcmp(name, "xmaxymax") == 0) {
+    if(IJSVGCharBufferCaseInsensitiveCompare(name, "xmaxymax") == YES) {
         return IJSVGViewBoxAlignmentXMaxYMax;
     }
     return IJSVGViewBoxAlignmentUnknown;

IJSVGExample/IJSVGExample/aspect-ratio 2.svg

@@ -0,0 +1,123 @@
+<svg viewBox="-1 -1 162 92" xmlns="http://www.w3.org/2000/svg">
+  <defs>
+     <path id="smiley" d="M50,10 A40,40,1,1,1,50,90 A40,40,1,1,1,50,10 M30,40 Q36,35,42,40 M58,40 Q64,35,70,40 M30,60 Q50,75,70,60 Q50,75,30,60" />
+      <style>
+      path {
+        fill: yellow;
+        stroke: black;
+        stroke-width: 8px;
+        stroke-linecap: round;
+        stroke-linejoin: round;
+        pointer-events: none;
+      }</style>
+  </defs>
+
+  <!-- (width>height) meet -->
+  <rect x="0" y="0" width="20" height="10">
+    <title>xMidYMid meet</title>
+  </rect>
+  <svg viewBox="0 0 100 100" width="20" height="10"
+       preserveAspectRatio="xMidYMid meet" x="0" y="0">
+    <use href="#smiley" />
+  </svg>
+
+  <rect x="25" y="0" width="20" height="10">
+    <title>xMinYMid meet</title>
+  </rect>
+  <svg viewBox="0 0 100 100" width="20" height="10"
+       preserveAspectRatio="xMinYMid meet" x="25" y="0">
+    <use href="#smiley" />
+  </svg>
+
+  <rect x="50" y="0" width="20" height="10">
+    <title>xMaxYMid meet</title>
+  </rect>
+  <svg viewBox="0 0 100 100" width="20" height="10"
+       preserveAspectRatio="xMaxYMid meet" x="50" y="0">
+    <use href="#smiley" />
+  </svg>
+
+  <!-- (width>height) slice -->
+  <rect x="0" y="15" width="20" height="10">
+    <title>xMidYMin slice</title>
+  </rect>
+  <svg viewBox="0 0 100 100" width="20" height="10"
+       preserveAspectRatio="xMidYMin slice" x="0" y="15">
+    <use href="#smiley" />
+  </svg>
+
+  <rect x="25" y="15" width="20" height="10">
+    <title>xMidYMid slice</title>
+  </rect>
+  <svg viewBox="0 0 100 100" width="20" height="10"
+       preserveAspectRatio="xMidYMid slice" x="25" y="15">
+    <use href="#smiley" />
+  </svg>
+
+  <rect x="50" y="15" width="20" height="10">
+    <title>xMidYMax slice</title>
+  </rect>
+  <svg viewBox="0 0 100 100" width="20" height="10"
+       preserveAspectRatio="xMidYMax slice" x="50" y="15">
+    <use href="#smiley" />
+  </svg>
+
+  <!-- (width<height) meet -->
+  <rect x="75" y="0" width="10" height="25">
+    <title>xMidYMin meet</title>
+  </rect>
+  <svg viewBox="0 0 100 100" width="10" height="25"
+       preserveAspectRatio="xMidYMin meet" x="75" y="0">
+    <use href="#smiley" />
+  </svg>
+
+  <rect x="90" y="0" width="10" height="25">
+    <title>xMidYMid meet</title>
+  </rect>
+  <svg viewBox="0 0 100 100" width="10" height="25"
+       preserveAspectRatio="xMidYMid meet" x="90" y="0">
+    <use href="#smiley" />
+  </svg>
+
+  <rect x="105" y="0" width="10" height="25">
+    <title>xMidYMax meet</title>
+  </rect>
+  <svg viewBox="0 0 100 100" width="10" height="25"
+       preserveAspectRatio="xMidYMax meet" x="105" y="0">
+    <use href="#smiley" />
+  </svg>
+
+  <!-- (width<height) slice -->
+  <rect x="120" y="0" width="10" height="25">
+    <title>xMinYMid slice</title>
+  </rect>
+  <svg viewBox="0 0 100 100" width="10" height="25"
+       preserveAspectRatio="xMinYMid slice" x="120" y="0">
+    <use href="#smiley" />
+  </svg>
+
+  <rect x="135" y="0" width="10" height="25">
+    <title>xMidYMid slice</title>
+  </rect>
+  <svg viewBox="0 0 100 100" width="10" height="25"
+       preserveAspectRatio="xMidYMid slice" x="135" y="0">
+    <use href="#smiley" />
+  </svg>
+
+  <rect x="150" y="0" width="10" height="25">
+    <title>xMaxYMid slice</title>
+  </rect>
+  <svg viewBox="0 0 100 100" width="10" height="25"
+       preserveAspectRatio="xMaxYMid slice" x="150" y="0">
+    <use href="#smiley" />
+  </svg>
+
+  <!-- none -->
+  <rect x="0" y="30" width="160" height="60">
+    <title>none</title>
+  </rect>
+  <svg viewBox="0 0 100 100" width="160" height="60"
+       preserveAspectRatio="none" x="0" y="30">
+    <use href="#smiley" />
+  </svg>
+</svg>

IJSVGExample/IJSVGExample/person-getting-massage-color-default.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="32" height="32" viewBox="0 0 32 32" fill="none">
+
+
+
+
+
+
+
+
+
+
+
+<g>
+<path d="M10.1269 10.7451L10.33 17.2295C10.5629 20.6062 12.5389 21.9852 15.9667 22.0028C15.9779 22.0028 15.9888 22.0029 16 22.0029C16.0111 22.0029 16.022 22.0029 16.0332 22.0029C19.461 21.9854 21.437 20.6062 21.6699 17.2295L21.873 10.7451C21.942 8.54454 20.7559 7.40112 20.1542 7.10449H11.8457C11.244 7.40112 10.0579 8.54454 10.1269 10.7451Z" fill="url(#paint8_radial_3987_24253)"/>
+</g>
+
+
+
+
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+
+
+
+
+
+
+
+
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+
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+
+
+<defs>
+
+
+
+
+
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+
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+
+
+
+
+
+
+
+
+
+
+
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+
+
+
+
+
+
+
+<radialGradient id="paint8_radial_3987_24253" cx="0" cy="0" r="1" gradientUnits="userSpaceOnUse" gradientTransform="translate(19.5752 15.9951) rotate(174.491) scale(6.18482 6.87814)">
+<stop offset="0.282722" stop-color="#FFDD41"/>
+<stop offset="1" stop-color="#FDA828"/>
+</radialGradient>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
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+
+
+
+
+
+
+
+
+
+
+</defs>
+</svg>

README.md

@@ -1,22 +1,39 @@
-IJSVG
-=====
-IJSVG is a Mac OSX 10.7+ COCOA library for rendering SVG's within your COCOA applications, its extremely fast and native.
+IJSVG 3.0
+===
 
-Orignaly written for IconJar (in development)
+IJSVG is a Mac OSX 10.13+ COCOA library for rendering SVG's within your COCOA applications, its extremely fast and native.
 
-It also supports the NSPasteboards writing protocol, an IJSVG object can be put onto the pasteboard and application like Sketch and Photoshop can paste them into the document as vector objects (generated PDF's on the fly).
+It also supports the `NSPasteboards` writing protocol, an IJSVG object can be put onto the pasteboard and application like Sketch and Photoshop can paste them into the document as vector objects (generated PDF's on the fly).
+
+### What is new in IJSVG 3.0?
+- Its almost a complete full rewrite.
+- Is now fully ARC 🎉.
+- Parsing and rendering is much faster.
+- Support for aspect ratios and nested SVG's.
+- Fixes a lot of pattern and gradient rendering.
+- Fixes various clipPath issues.
+- Masking now correctly uses alpha masking instead of what `CALayer` uses.
+- Various improvements with exporting such as modifying the viewBox instead of using a new group for scaling.
+- Exporting now supports converting strokes to paths.
+- Much simpler to use API's for creating SVG's from scratch.
+- Much better threading support.
+- Much improved color replacement support (can now specify only replacing a color that is a fill and not touch ths stroke).
+- Improved API's for querying the node graph.
+- Support for the wild card CSS selector.
+- Removed most `NS` graphics API calls and uses `CG` where possible.
+- Various memory and performance increases throughout.
 
 Quick Start
 ====
 Add all the IJSVG library files into your project, import the IJSVG.h into the files you wish to use the SVG's. The easiest way to
 
 #### Step 1 - initialize the SVG object
-    IJSVG * svg = [[IJSVG alloc] initWithFilePathURL:someURLHere];
+    IJSVG* svg = [[IJSVG alloc] initWithFilePathURL:someURLHere];
     // or with and without extension to find it within the bundle
-    IJSVG * svg = [IJSVG svgNamed:@"my_svg"]; 
+    IJSVG* svg = [IJSVG SVGNamed:@"my_svg"]; 
 
 #### Step 2 - grab the NSImage from it
-    NSImage * svgImage = [svg imageWithSize:NSMakeSize(100.f,100.f)];
+    NSImage* svgImage = [svg imageWithSize:CGSizeMake(100.f,100.f)];
   
 #Other ways of drawing
 
@@ -33,49 +50,31 @@ IJSVG provides a very simple way of helping out the backing scale factor of the
 
     __block IJSVG * svg ....
     svg.renderingBackingScaleHelper = ^{
-        return [svg computeBackingScale:someView.window.backingScaleFactor];
+        return NSScreen.mainScreen.backingScaleFactor; // can be changed to whatever
     };
     
 # Exporting
-#### Yes, thats right... CALayers -> SVG (whos idea was this?!)
 
-IJSVG provides a way of exporting the rendered layer tree back to an SVG file. This isnt 100% perfect but it does a good job of generating what IJSVG renders (have yet to find an issue).
+IJSVG provides a way of exporting the rendered layer tree back to an SVG file. This should be a 1:1 representation of what is rendered in CoreGraphics.
 
 Its a simple as doing this:
 
-    IJSVG * svg ...
+    IJSVG* svg ...
     IJSVGExporter * exporter = [[IJSVGExporter alloc] initWithSVG:svg options:IJSVGExporterOptionAll];
-    NSString * svgString = [exporter SVGString];
+    NSString* svgString = exporter.SVGString;
     
-Which will give you back the SVG code to put into a file, there are various options you can give it for more XML manipulation such s collpasing groups and converting transform's from matrix's back to their human readable counter parts.
-
-The fun part is you can actually create an SVG object from a IJSVGLayer and work with them without needing to load a file, for example:
-
-    // create group layer and a shape layer (subclass of CAShapeLayer)
-    IJSVGGroupLayer * baseSVGGroup = ....
-    IJSVGShapeLayer * shapeLayer = ....
-    [baseSVGGroup addSublayer:shapeLayer];
-    
-    // create the SVG - note the viewbox!
-    IJSVG * svg = [[IJSVG alloc] initWithSVGLayer:baseSVGGroup viewBox:NSMakeRect(0.f, 0.f, 50.f, 50.f)];
-    .... do what you want
-    
-and now you would have a usuable SVG to render where ever you would like and more importantly you can now export that back to an SVG file.
-
-All layers must be of generic type IJSVGLayer or IJSVGShapeLayer, it will throw an exception if you do not use these. Also if you go out the scope of what those layers can do, it wont render nor will it export (get malformed results).
+Which will give you back the SVG code to put into a file, there are various options you can give it for more XML manipulation such as collpasing groups and converting transform's from matrix's back to their human readable counter parts.
     
 # What it supports
-* Elements: def, use, g, path, clipPath, circle, elipse, rect, polyline, polygon and line (supports groups heirachy and inheritance, clip-paths etc)
-* Commands: A, M, L, H, V, C, S, T, Q and Z and full support for multiple parameters of each type
-* Transformations: matrix, rotate, translate, scale and skew transformations
-* Stroking: stroking, stroke color, stroke opacity, dashed, dashed offset and phase, stroke line cap style
-* Filling: fill color, fill mode (winding rules), fill opacity, linear gradients, radial gradients and patterns
-* Color: supports all predefined colors from the SVG spec and hex values
-* Caching: has basic caching implemenation
-* CSS: Basic embedded style sheets are support with very basic selectors
-* Switches and foreign objects, there is a delegate you can implement to handle foreign objects, once you say you can handle it, its up to you to handle the SVG as IJSVG will stop parsing the document once you have told it you will handle it
+* Elements: def, use, g, path, clipPath, circle, elipse, rect, polyline, polygon and line (supports groups heirachy and inheritance, clip-paths etc).
+* Commands: A, M, L, H, V, C, S, T, Q and Z and full support for multiple parameters of each type.
+* Transformations: matrix, rotate, translate, scale and skew transformations.
+* Stroking: stroking, stroke color, stroke opacity, dashed, dashed offset and phase, stroke line cap style.
+* Filling: fill color, fill mode (winding rules), fill opacity, linear gradients, radial gradients and patterns.
+* Color: supports all predefined colors from the SVG spec, HEX values along with RGB(A) and HSL.
+* CSS: Basic embedded style sheets are support with very basic selectors.
 
 ## Credit
 IJSVG is loosely based on [UIBezierPath-SVG](https://github.com/ap4y/UIBezierPath-SVG) by [ap4y](https://github.com/ap4y)
 
-SVG icons in example found around the net, some from [Sketch App Resources](http://www.sketchappsources.com/all-svg-resource.html) all open source and free to use
+SVG icons in example found around the net, some from [Sketch App Resources](http://www.sketchappsources.com/all-svg-resource.html) all open source and free to use.

_config.yml

@@ -1 +0,0 @@
-theme: jekyll-theme-cayman