diff --git a/platform/unix/genmodules b/platform/unix/genmodules
index c0374d359..f63ad6382 100644
--- a/platform/unix/genmodules
+++ b/platform/unix/genmodules
@@ -78,11 +78,13 @@ genmodules()
 	for library in *; do
 		NAME="LOVE_LIBRARY_$(upper "$library")"
 		flags="$flags library-$library"
-
-		printf "if $NAME\n"
-		printf "liblove${love_amsuffix}_la_SOURCES += \\\\\n"
 		FILES="$(sourcefind "$library" | sed "s/^/    /")"
-		printf "${FILES:0:${#FILES}-2}\nendif\n\n"
+
+		if [[ ${#FILES} -gt 2 ]]; then
+			printf "if $NAME\n"
+			printf "liblove${love_amsuffix}_la_SOURCES += \\\\\n"
+			printf "${FILES:0:${#FILES}-2}\nendif\n\n"
+		fi
 	done
 	cd ../..
 }
diff --git a/src/common/Data.h b/src/common/Data.h
index 1ba34c49e..aa2031077 100644
--- a/src/common/Data.h
+++ b/src/common/Data.h
@@ -47,7 +47,7 @@ public:
 	 * Gets a pointer to the data. This pointer will obviously not
 	 * be valid if the Data object is destroyed.
 	 **/
-	virtual void *getData() const = 0 ;
+	virtual void *getData() const = 0;
 
 	/**
 	 * Gets the size of the Data in bytes.
diff --git a/src/common/EnumMap.h b/src/common/EnumMap.h
index 3586c35e3..af6660845 100644
--- a/src/common/EnumMap.h
+++ b/src/common/EnumMap.h
@@ -26,7 +26,7 @@
 namespace love
 {
 
-template<typename T, typename U, unsigned PEAK>
+template<typename T, typename U, unsigned int PEAK>
 class EnumMap
 {
 public:
@@ -37,14 +37,14 @@ public:
 		U u;
 	};
 
-	EnumMap(Entry *entries, unsigned size)
+	EnumMap(const Entry *entries, unsigned int size)
 	{
-		unsigned n = size/sizeof(Entry);
+		unsigned int n = size / sizeof(Entry);
 
-		for (unsigned i = 0; i<n; ++i)
+		for (unsigned int i = 0; i < n; ++i)
 		{
-			unsigned e_t = (unsigned)entries[i].t;
-			unsigned e_u = (unsigned)entries[i].u;
+			unsigned int e_t = (unsigned int) entries[i].t;
+			unsigned int e_u = (unsigned int) entries[i].u;
 
 			if (e_t < PEAK)
 			{
@@ -61,9 +61,9 @@ public:
 
 	bool find(T t, U &u)
 	{
-		if ((unsigned)t < PEAK && values_u[(unsigned)t].set)
+		if ((unsigned int) t < PEAK && values_u[(unsigned int) t].set)
 		{
-			u = (U)values_u[(unsigned)t].v;
+			u = (U) values_u[(unsigned int) t].v;
 			return true;
 		}
 
@@ -72,9 +72,9 @@ public:
 
 	bool find(U u, T &t)
 	{
-		if ((unsigned)u < PEAK && values_t[(unsigned)u].set)
+		if ((unsigned int) u < PEAK && values_t[(unsigned int) u].set)
 		{
-			t = (T)values_t[(unsigned)u].v;
+			t = (T) values_t[(unsigned int) u].v;
 			return true;
 		}
 
diff --git a/src/common/StringMap.h b/src/common/StringMap.h
index 34ad7eee8..456a46058 100644
--- a/src/common/StringMap.h
+++ b/src/common/StringMap.h
@@ -26,7 +26,7 @@
 namespace love
 {
 
-template<typename T, unsigned SIZE>
+template<typename T, unsigned int SIZE>
 class StringMap
 {
 public:
@@ -37,18 +37,16 @@ public:
 		T value;
 	};
 
-	StringMap(Entry *entries, unsigned num)
+	StringMap(const Entry *entries, unsigned int num)
 	{
 
-		for (unsigned i = 0; i < SIZE; ++i)
-			reverse[i] = 0;
+		for (unsigned int i = 0; i < SIZE; ++i)
+			reverse[i] = nullptr;
 
-		unsigned n = num/sizeof(Entry);
+		unsigned int n = num / sizeof(Entry);
 
-		for (unsigned i = 0; i < n; ++i)
-		{
+		for (unsigned int i = 0; i < n; ++i)
 			add(entries[i].key, entries[i].value);
-		}
 	}
 
 	bool streq(const char *a, const char *b)
@@ -57,6 +55,7 @@ public:
 		{
 			if (*a != *b)
 				return false;
+
 			++a;
 			++b;
 		}
@@ -66,11 +65,11 @@ public:
 
 	bool find(const char *key, T &t)
 	{
-		unsigned str_hash = djb2(key);
+		unsigned int str_hash = djb2(key);
 
-		for (unsigned i = 0; i < MAX; ++i)
+		for (unsigned int i = 0; i < MAX; ++i)
 		{
-			unsigned str_i = (str_hash + i) % MAX;
+			unsigned int str_i = (str_hash + i) % MAX;
 
 			if (!records[str_i].set)
 				return false;
@@ -85,14 +84,14 @@ public:
 		return false;
 	}
 
-	bool find(T key, const char  *&str)
+	bool find(T key, const char *&str)
 	{
-		unsigned index = (unsigned)key;
+		unsigned int index = (unsigned int) key;
 
 		if (index >= SIZE)
 			return false;
 
-		if (reverse[index] != 0)
+		if (reverse[index] != nullptr)
 		{
 			str = reverse[index];
 			return true;
@@ -105,12 +104,12 @@ public:
 
 	bool add(const char *key, T value)
 	{
-		unsigned str_hash = djb2(key);
+		unsigned int str_hash = djb2(key);
 		bool inserted = false;
 
-		for (unsigned i = 0; i < MAX; ++i)
+		for (unsigned int i = 0; i < MAX; ++i)
 		{
-			unsigned str_i = (str_hash + i) % MAX;
+			unsigned int str_i = (str_hash + i) % MAX;
 
 			if (!records[str_i].set)
 			{
@@ -122,7 +121,7 @@ public:
 			}
 		}
 
-		unsigned index = (unsigned)value;
+		unsigned int index = (unsigned int) value;
 
 		if (index >= SIZE)
 		{
@@ -135,9 +134,9 @@ public:
 		return inserted;
 	}
 
-	unsigned djb2(const char *key)
+	unsigned int djb2(const char *key)
 	{
-		unsigned hash = 5381;
+		unsigned int hash = 5381;
 		int c;
 
 		while ((c = *key++))
@@ -156,7 +155,7 @@ private:
 		Record() : set(false) {}
 	};
 
-	const static unsigned MAX = SIZE*2;
+	static const unsigned int MAX = SIZE * 2;
 
 	Record records[MAX];
 	const char *reverse[SIZE];
diff --git a/src/common/Variant.h b/src/common/Variant.h
index 4592a2fa9..dd8b68fac 100644
--- a/src/common/Variant.h
+++ b/src/common/Variant.h
@@ -48,7 +48,6 @@ public:
 	static Variant *fromLua(lua_State *L, int n, bool allowTables = true);
 	void toLua(lua_State *L);
 
-private:
 	enum Type
 	{
 		UNKNOWN = 0,
@@ -74,6 +73,8 @@ private:
 		void *userdata;
 		std::vector<std::pair<Variant*, Variant*> > *table;
 	} data;
+
+private:
 	love::Type udatatype;
 	bits flags;
 
diff --git a/src/common/int.h b/src/common/int.h
index ac57f89ec..9cffea606 100644
--- a/src/common/int.h
+++ b/src/common/int.h
@@ -21,11 +21,10 @@
 #ifndef LOVE_INT_H
 #define LOVE_INT_H
 
-#include "common/config.h"
-
-#ifndef LOVE_WINDOWS
+// C standard sized integer types.
+// This header was added to Visual studio in VS 2012, which is LOVE's current
+// minimum supported VS version (as of this comment's commit date.)
 #include <stdint.h>
-#endif
 
 #define LOVE_INT8_MAX   0x7F
 #define LOVE_UINT8_MAX  0xFF
@@ -39,26 +38,14 @@
 namespace love
 {
 
-// Blame Microsoft
-#ifdef LOVE_WINDOWS
-	typedef __int8 int8;
-	typedef unsigned __int8 uint8;
-	typedef __int16 int16;
-	typedef unsigned __int16 uint16;
-	typedef __int32 int32;
-	typedef unsigned __int32 uint32;
-	typedef __int64 int64;
-	typedef unsigned __int64 uint64;
-#else // LOVE_WINDOWS
-	typedef int8_t int8;
-	typedef uint8_t uint8;
-	typedef int16_t int16;
-	typedef uint16_t uint16;
-	typedef int32_t int32;
-	typedef uint32_t uint32;
-	typedef int64_t int64;
-	typedef uint64_t uint64;
-#endif // LOVE_WINDOWS
+typedef int8_t int8;
+typedef uint8_t uint8;
+typedef int16_t int16;
+typedef uint16_t uint16;
+typedef int32_t int32;
+typedef uint32_t uint32;
+typedef int64_t int64;
+typedef uint64_t uint64;
 
 } // love
 
diff --git a/src/modules/audio/openal/Audio.cpp b/src/modules/audio/openal/Audio.cpp
index c6af9be19..c424524d5 100644
--- a/src/modules/audio/openal/Audio.cpp
+++ b/src/modules/audio/openal/Audio.cpp
@@ -37,6 +37,7 @@ Audio::PoolThread::PoolThread(Pool *pool)
 	, finish(false)
 {
 	mutex = thread::newMutex();
+	threadName = "AudioPool";
 }
 
 Audio::PoolThread::~PoolThread()
diff --git a/src/modules/audio/openal/Source.cpp b/src/modules/audio/openal/Source.cpp
index a8f9af8f3..df81d4ec8 100644
--- a/src/modules/audio/openal/Source.cpp
+++ b/src/modules/audio/openal/Source.cpp
@@ -259,10 +259,7 @@ bool Source::update()
 
 			alGetSourcef(source, AL_SAMPLE_OFFSET, &curOffsetSamples);
 
-			ALint b;
-			alGetSourcei(source, AL_BUFFER, &b);
-			int freq;
-			alGetBufferi(b, AL_FREQUENCY, &freq);
+			int freq = decoder->getSampleRate();
 			curOffsetSecs = curOffsetSamples / freq;
 
 			// Get a free buffer.
@@ -338,11 +335,7 @@ void Source::seekAtomic(float offset, void *unit)
 			if (type == TYPE_STREAM)
 			{
 				offsetSamples = offset;
-				ALint buffer;
-				alGetSourcei(source, AL_BUFFER, &buffer);
-				int freq;
-				alGetBufferi(buffer, AL_FREQUENCY, &freq);
-				offset /= freq;
+				offset /= decoder->getSampleRate();
 				offsetSeconds = offset;
 				decoder->seek(offset);
 			}
@@ -357,11 +350,7 @@ void Source::seekAtomic(float offset, void *unit)
 			{
 				offsetSeconds = offset;
 				decoder->seek(offset);
-				ALint buffer;
-				alGetSourcei(source, AL_BUFFER, &buffer);
-				int freq;
-				alGetBufferi(buffer, AL_FREQUENCY, &freq);
-				offsetSamples = offset*freq;
+				offsetSamples = offset * decoder->getSampleRate();
 			}
 			else
 			{
@@ -403,11 +392,7 @@ float Source::tellAtomic(void *unit) const
 		default:
 			{
 				alGetSourcef(source, AL_SAMPLE_OFFSET, &offset);
-				ALint buffer;
-				alGetSourcei(source, AL_BUFFER, &buffer);
-				int freq;
-				alGetBufferi(buffer, AL_FREQUENCY, &freq);
-				offset /= freq;
+				offset /= decoder->getSampleRate();
 				if (type == TYPE_STREAM) offset += offsetSeconds;
 			}
 			break;
diff --git a/src/modules/event/sdl/Event.cpp b/src/modules/event/sdl/Event.cpp
index aec8340ed..6a379b221 100644
--- a/src/modules/event/sdl/Event.cpp
+++ b/src/modules/event/sdl/Event.cpp
@@ -270,10 +270,7 @@ Message *Event::convertJoystickEvent(const SDL_Event &e) const
 
 			arg1 = new Variant(JOYSTICK_JOYSTICK_ID, (void *) &proxy);
 			arg2 = new Variant((double)(e.jaxis.axis+1));
-			float value = e.jaxis.value / 32768.0f;
-			if (fabsf(value) < 0.001f) value = 0.0f;
-			if (value < -0.99f) value = -1.0f;
-			if (value > 0.99f) value = 1.0f;
+			float value = joystick::Joystick::clampval(e.jaxis.value / 32768.0f);
 			arg3 = new Variant((double) value);
 			msg = new Message("joystickaxis", arg1, arg2, arg3);
 			arg1->release();
@@ -332,10 +329,7 @@ Message *Event::convertJoystickEvent(const SDL_Event &e) const
 			arg1 = new Variant(JOYSTICK_JOYSTICK_ID, (void *) &proxy);
 
 			arg2 = new Variant(txt, strlen(txt));
-			float value = e.jaxis.value / 32768.0f;
-			if (fabsf(value) < 0.001f) value = 0.0f;
-			if (value < -0.99f) value = -1.0f;
-			if (value > 0.99f) value = 1.0f;
+			float value = joystick::Joystick::clampval(e.caxis.value / 32768.0f);
 			arg3 = new Variant((double) value);
 			msg = new Message("gamepadaxis", arg1, arg2, arg3);
 			arg1->release();
diff --git a/src/modules/event/sdl/Event.h b/src/modules/event/sdl/Event.h
index 7b8df4ac4..1028a7211 100644
--- a/src/modules/event/sdl/Event.h
+++ b/src/modules/event/sdl/Event.h
@@ -80,7 +80,7 @@ private:
 	static EnumMap<love::mouse::Mouse::Button, Uint8, love::mouse::Mouse::BUTTON_MAX_ENUM>::Entry buttonEntries[];
 	static EnumMap<love::mouse::Mouse::Button, Uint8, love::mouse::Mouse::BUTTON_MAX_ENUM> buttons;
 
-}; // System
+}; // Event
 
 } // sdl
 } // event
diff --git a/src/modules/graphics/opengl/ParticleSystem.cpp b/src/modules/graphics/opengl/ParticleSystem.cpp
index e47525005..49f4cf087 100644
--- a/src/modules/graphics/opengl/ParticleSystem.cpp
+++ b/src/modules/graphics/opengl/ParticleSystem.cpp
@@ -276,8 +276,8 @@ void ParticleSystem::initParticle(Particle *p, float t)
 	min = speedMin;
 	max = speedMax;
 	float speed = (float) rng.random(min, max);
-	p->speed = love::Vector(cosf(p->direction), sinf(p->direction));
-	p->speed *= speed;
+	p->velocity = love::Vector(cosf(p->direction), sinf(p->direction));
+	p->velocity *= speed;
 
 	p->linearAcceleration.x = (float) rng.random(linearAccelerationMin.x, linearAccelerationMax.x);
 	p->linearAcceleration.y = (float) rng.random(linearAccelerationMin.y, linearAccelerationMax.y);
@@ -302,7 +302,7 @@ void ParticleSystem::initParticle(Particle *p, float t)
 
 	p->angle = p->rotation;
 	if (relativeRotation)
-		p->angle += atan2f(p->speed.y, p->speed.x);
+		p->angle += atan2f(p->velocity.y, p->velocity.x);
 
 	p->color = colors[0];
 }
@@ -907,11 +907,11 @@ void ParticleSystem::update(float dt)
 			// Resize tangential.
 			tangential *= p->tangentialAcceleration;
 
-			// Update position.
-			p->speed += (radial+tangential+p->linearAcceleration)*dt;
+			// Update velocity.
+			p->velocity += (radial + tangential + p->linearAcceleration) * dt;
 
 			// Modify position.
-			ppos += p->speed * dt;
+			ppos += p->velocity * dt;
 
 			p->position[0] = ppos.getX();
 			p->position[1] = ppos.getY();
@@ -924,7 +924,7 @@ void ParticleSystem::update(float dt)
 			p->angle = p->rotation;
 
 			if (relativeRotation)
-				p->angle += atan2f(p->speed.y, p->speed.x);
+				p->angle += atan2f(p->velocity.y, p->velocity.x);
 
 			// Change size according to given intervals:
 			// i = 0       1       2      3          n-1
diff --git a/src/modules/graphics/opengl/ParticleSystem.h b/src/modules/graphics/opengl/ParticleSystem.h
index 272ab8303..96e6f8d5a 100644
--- a/src/modules/graphics/opengl/ParticleSystem.h
+++ b/src/modules/graphics/opengl/ParticleSystem.h
@@ -516,7 +516,7 @@ protected:
 		// Particles gravitate towards this point.
 		love::Vector origin;
 
-		love::Vector speed;
+		love::Vector velocity;
 		love::Vector linearAcceleration;
 		float radialAcceleration;
 		float tangentialAcceleration;
diff --git a/src/modules/graphics/opengl/Shader.cpp b/src/modules/graphics/opengl/Shader.cpp
index 910d51fa2..f2d5197e8 100644
--- a/src/modules/graphics/opengl/Shader.cpp
+++ b/src/modules/graphics/opengl/Shader.cpp
@@ -186,8 +186,16 @@ void Shader::createProgram(const std::vector<GLuint> &shaderids)
 	// Bind generic vertex attribute indices to names in the shader.
 	for (int i = 0; i < int(OpenGL::ATTRIB_MAX_ENUM); i++)
 	{
+		OpenGL::VertexAttrib attrib = (OpenGL::VertexAttrib) i;
+
+		// FIXME: We skip this both because pseudo-instancing is temporarily
+		// disabled (see graphics.lua), and because binding a non-existant
+		// attribute name to a location causes a shader linker warning.
+		if (attrib == OpenGL::ATTRIB_PSEUDO_INSTANCE_ID)
+			continue;
+
 		const char *name = nullptr;
-		if (attribNames.find((OpenGL::VertexAttrib) i, name))
+		if (attribNames.find(attrib, name))
 			glBindAttribLocation(program, i, (const GLchar *) name);
 	}
 
@@ -247,7 +255,7 @@ void Shader::mapActiveUniforms()
 		}
 
 		// If this is a built-in (LOVE-created) uniform, store the location.
-		BuiltinExtern builtin;
+		BuiltinUniform builtin;
 		if (builtinNames.find(u.name.c_str(), builtin))
 			builtinUniforms[int(builtin)] = u.location;
 
@@ -652,19 +660,36 @@ int Shader::getTextureUnit(const std::string &name)
 	return texunit;
 }
 
+Shader::UniformType Shader::getExternVariable(const std::string &name, int &components, int &count)
+{
+	auto it = uniforms.find(name);
+
+	if (it == uniforms.end())
+	{
+		components = 0;
+		count = 0;
+		return UNIFORM_UNKNOWN;
+	}
+
+	components = getUniformTypeSize(it->second.type);
+	count = (int) it->second.count;
+
+	return it->second.baseType;
+}
+
 bool Shader::hasVertexAttrib(OpenGL::VertexAttrib attrib) const
 {
 	return vertexAttributes[int(attrib)] != -1;
 }
 
-bool Shader::hasBuiltinExtern(BuiltinExtern builtin) const
+bool Shader::hasBuiltinUniform(BuiltinUniform builtin) const
 {
 	return builtinUniforms[int(builtin)] != -1;
 }
 
-bool Shader::sendBuiltinFloat(BuiltinExtern builtin, int size, const GLfloat *vec, int count)
+bool Shader::sendBuiltinFloat(BuiltinUniform builtin, int size, const GLfloat *vec, int count)
 {
-	if (!hasBuiltinExtern(builtin))
+	if (!hasBuiltinUniform(builtin))
 		return false;
 
 	GLint location = builtinUniforms[int(builtin)];
@@ -754,6 +779,16 @@ bool Shader::isSupported()
 	return getGLSLVersion() >= "1.2";
 }
 
+bool Shader::getConstant(const char *in, UniformType &out)
+{
+	return uniformTypes.find(in, out);
+}
+
+bool Shader::getConstant(UniformType in, const char *&out)
+{
+	return uniformTypes.find(in, out);
+}
+
 StringMap<Shader::ShaderType, Shader::TYPE_MAX_ENUM>::Entry Shader::typeNameEntries[] =
 {
 	{"vertex", Shader::TYPE_VERTEX},
@@ -762,6 +797,17 @@ StringMap<Shader::ShaderType, Shader::TYPE_MAX_ENUM>::Entry Shader::typeNameEntr
 
 StringMap<Shader::ShaderType, Shader::TYPE_MAX_ENUM> Shader::typeNames(Shader::typeNameEntries, sizeof(Shader::typeNameEntries));
 
+StringMap<Shader::UniformType, Shader::UNIFORM_MAX_ENUM>::Entry Shader::uniformTypeEntries[] =
+{
+	{"float", Shader::UNIFORM_FLOAT},
+	{"int", Shader::UNIFORM_INT},
+	{"bool", Shader::UNIFORM_BOOL},
+	{"image", Shader::UNIFORM_SAMPLER},
+	{"unknown", Shader::UNIFORM_UNKNOWN},
+};
+
+StringMap<Shader::UniformType, Shader::UNIFORM_MAX_ENUM> Shader::uniformTypes(Shader::uniformTypeEntries, sizeof(Shader::uniformTypeEntries));
+
 StringMap<OpenGL::VertexAttrib, OpenGL::ATTRIB_MAX_ENUM>::Entry Shader::attribNameEntries[] =
 {
 	{"love_PseudoInstanceID", OpenGL::ATTRIB_PSEUDO_INSTANCE_ID},
@@ -769,12 +815,12 @@ StringMap<OpenGL::VertexAttrib, OpenGL::ATTRIB_MAX_ENUM>::Entry Shader::attribNa
 
 StringMap<OpenGL::VertexAttrib, OpenGL::ATTRIB_MAX_ENUM> Shader::attribNames(Shader::attribNameEntries, sizeof(Shader::attribNameEntries));
 
-StringMap<Shader::BuiltinExtern, Shader::BUILTIN_MAX_ENUM>::Entry Shader::builtinNameEntries[] =
+StringMap<Shader::BuiltinUniform, Shader::BUILTIN_MAX_ENUM>::Entry Shader::builtinNameEntries[] =
 {
 	{"love_ScreenSize", Shader::BUILTIN_SCREEN_SIZE},
 };
 
-StringMap<Shader::BuiltinExtern, Shader::BUILTIN_MAX_ENUM> Shader::builtinNames(Shader::builtinNameEntries, sizeof(Shader::builtinNameEntries));
+StringMap<Shader::BuiltinUniform, Shader::BUILTIN_MAX_ENUM> Shader::builtinNames(Shader::builtinNameEntries, sizeof(Shader::builtinNameEntries));
 
 } // opengl
 } // graphics
diff --git a/src/modules/graphics/opengl/Shader.h b/src/modules/graphics/opengl/Shader.h
index db116cc47..38c70a137 100644
--- a/src/modules/graphics/opengl/Shader.h
+++ b/src/modules/graphics/opengl/Shader.h
@@ -56,13 +56,24 @@ public:
 		TYPE_MAX_ENUM
 	};
 
-	// Built-in extern (uniform) variables.
-	enum BuiltinExtern
+	// Built-in uniform (extern) variables.
+	enum BuiltinUniform
 	{
 		BUILTIN_SCREEN_SIZE,
 		BUILTIN_MAX_ENUM
 	};
 
+	// Types of potential uniform (extern) variables used in love's shaders.
+	enum UniformType
+	{
+		UNIFORM_FLOAT,
+		UNIFORM_INT,
+		UNIFORM_BOOL,
+		UNIFORM_SAMPLER,
+		UNIFORM_UNKNOWN,
+		UNIFORM_MAX_ENUM
+	};
+
 	// Type for a list of shader source codes in the form of sources[shadertype] = code
 	typedef std::map<ShaderType, std::string> ShaderSources;
 
@@ -135,12 +146,25 @@ public:
 	 **/
 	void sendTexture(const std::string &name, Texture *texture);
 
+	/**
+	 * Gets the type, number of components, and number of array elements of
+	 * an active 'extern' (uniform) variable in the shader. If a uniform
+	 * variable with the specified name doesn't exist, returns UNIFORM_UNKNOWN
+	 * and sets the 'components' and 'count' values to 0.
+	 *
+	 * @param name The name of the uniform variable in the source code.
+	 * @param[out] components Number of components of the variable (2 for vec2.)
+	 * @param[out] count Number of array elements, if the variable is an array.
+	 * @return The base type of the uniform variable.
+	 **/
+	UniformType getExternVariable(const std::string &name, int &components, int &count);
+
 	/**
 	 * Internal use only.
 	 **/
 	bool hasVertexAttrib(OpenGL::VertexAttrib attrib) const;
-	bool hasBuiltinExtern(BuiltinExtern builtin) const;
-	bool sendBuiltinFloat(BuiltinExtern builtin, int size, const GLfloat *m, int count);
+	bool hasBuiltinUniform(BuiltinUniform builtin) const;
+	bool sendBuiltinFloat(BuiltinUniform builtin, int size, const GLfloat *m, int count);
 	void checkSetScreenParams();
 
 	const std::map<std::string, Object *> &getBoundRetainables() const;
@@ -148,17 +172,10 @@ public:
 	static std::string getGLSLVersion();
 	static bool isSupported();
 
-private:
+	static bool getConstant(const char *in, UniformType &out);
+	static bool getConstant(UniformType in, const char *&out);
 
-	// Types of potential uniform variables used in love's shaders.
-	enum UniformType
-	{
-		UNIFORM_FLOAT,
-		UNIFORM_INT,
-		UNIFORM_BOOL,
-		UNIFORM_SAMPLER,
-		UNIFORM_UNKNOWN
-	};
+private:
 
 	// Represents a single uniform/extern shader variable.
 	struct Uniform
@@ -227,13 +244,16 @@ private:
 	static StringMap<ShaderType, TYPE_MAX_ENUM>::Entry typeNameEntries[];
 	static StringMap<ShaderType, TYPE_MAX_ENUM> typeNames;
 
+	static StringMap<UniformType, UNIFORM_MAX_ENUM>::Entry uniformTypeEntries[];
+	static StringMap<UniformType, UNIFORM_MAX_ENUM> uniformTypes;
+
 	// Names for the generic vertex attributes used by love.
 	static StringMap<OpenGL::VertexAttrib, OpenGL::ATTRIB_MAX_ENUM>::Entry attribNameEntries[];
 	static StringMap<OpenGL::VertexAttrib, OpenGL::ATTRIB_MAX_ENUM> attribNames;
 
 	// Names for the built-in uniform variables.
-	static StringMap<BuiltinExtern, BUILTIN_MAX_ENUM>::Entry builtinNameEntries[];
-	static StringMap<BuiltinExtern, BUILTIN_MAX_ENUM> builtinNames;
+	static StringMap<BuiltinUniform, BUILTIN_MAX_ENUM>::Entry builtinNameEntries[];
+	static StringMap<BuiltinUniform, BUILTIN_MAX_ENUM> builtinNames;
 };
 
 } // opengl
diff --git a/src/modules/graphics/opengl/SpriteBatch.cpp b/src/modules/graphics/opengl/SpriteBatch.cpp
index bd2e52f99..8b311f514 100644
--- a/src/modules/graphics/opengl/SpriteBatch.cpp
+++ b/src/modules/graphics/opengl/SpriteBatch.cpp
@@ -111,7 +111,7 @@ int SpriteBatch::add(float x, float y, float a, float sx, float sy, float ox, fl
 	memcpy(sprite, texture->getVertices(), sizeof(Vertex) * 4);
 
 	// Transform.
-	static Matrix t;
+	Matrix t;
 	t.setTransformation(x, y, a, sx, sy, ox, oy, kx, ky);
 	t.transform(sprite, sprite, 4);
 
@@ -138,7 +138,7 @@ int SpriteBatch::addq(Quad *quad, float x, float y, float a, float sx, float sy,
 	// Needed for colors.
 	memcpy(sprite, quad->getVertices(), sizeof(Vertex) * 4);
 
-	static Matrix t;
+	Matrix t;
 	t.setTransformation(x, y, a, sx, sy, ox, oy, kx, ky);
 	t.transform(sprite, sprite, 4);
 
diff --git a/src/modules/graphics/opengl/wrap_Shader.cpp b/src/modules/graphics/opengl/wrap_Shader.cpp
index c51cfddad..914c153c3 100644
--- a/src/modules/graphics/opengl/wrap_Shader.cpp
+++ b/src/modules/graphics/opengl/wrap_Shader.cpp
@@ -346,6 +346,38 @@ int w_Shader_send(lua_State *L)
 	return luaL_argerror(L, 3, "number, boolean, table, image, or canvas expected");
 }
 
+int w_Shader_getExternVariable(lua_State *L)
+{
+	Shader *shader = luax_checkshader(L, 1);
+	const char *name = luaL_checkstring(L, 2);
+
+	int components = 0;
+	int arrayelements = 0;
+	Shader::UniformType type = Shader::UNIFORM_UNKNOWN;
+
+	type = shader->getExternVariable(name, components, arrayelements);
+
+	// Check if the variable exists (function will set components to 0 if not.)
+	if (components > 0)
+	{
+		const char *tname = nullptr;
+		if (!Shader::getConstant(type, tname))
+			return luaL_error(L, "Unknown extern variable type name.");
+
+		lua_pushstring(L, tname);
+		lua_pushinteger(L, components);
+		lua_pushinteger(L, arrayelements);
+	}
+	else
+	{
+		lua_pushnil(L);
+		lua_pushnil(L);
+		lua_pushnil(L);
+	}
+
+	return 3;
+}
+
 static const luaL_Reg functions[] =
 {
 	{ "getWarnings", w_Shader_getWarnings },
@@ -355,6 +387,7 @@ static const luaL_Reg functions[] =
 	{ "sendMatrix",  w_Shader_sendMatrix },
 	{ "sendTexture", w_Shader_sendTexture },
 	{ "send",        w_Shader_send },
+	{ "getExternVariable", w_Shader_getExternVariable },
 	{ 0, 0 }
 };
 
diff --git a/src/modules/graphics/opengl/wrap_Shader.h b/src/modules/graphics/opengl/wrap_Shader.h
index be7b81db4..f89295399 100644
--- a/src/modules/graphics/opengl/wrap_Shader.h
+++ b/src/modules/graphics/opengl/wrap_Shader.h
@@ -38,6 +38,7 @@ int w_Shader_sendFloat(lua_State *L);
 int w_Shader_sendMatrix(lua_State *L);
 int w_Shader_sendTexture(lua_State *L);
 int w_Shader_send(lua_State *L);
+int w_Shader_getExternVariable(lua_State *L);
 extern "C" int luaopen_shader(lua_State *L);
 
 } // opengl
diff --git a/src/modules/joystick/Joystick.cpp b/src/modules/joystick/Joystick.cpp
index 03946abc0..fb0b72428 100644
--- a/src/modules/joystick/Joystick.cpp
+++ b/src/modules/joystick/Joystick.cpp
@@ -29,7 +29,7 @@ namespace love
 namespace joystick
 {
 
-float Joystick::clampval(float x) const
+float Joystick::clampval(float x)
 {
 	if (fabsf(x) < 0.01)
 		return 0.0f;
diff --git a/src/modules/joystick/Joystick.h b/src/modules/joystick/Joystick.h
index d2d57fa21..dde6bebdc 100644
--- a/src/modules/joystick/Joystick.h
+++ b/src/modules/joystick/Joystick.h
@@ -173,9 +173,7 @@ public:
 	static bool getConstant(const char *in, InputType &out);
 	static bool getConstant(InputType in, const char *&out);
 
-protected:
-
-	float clampval(float x) const;
+	static float clampval(float x);
 
 private:
 
diff --git a/src/modules/keyboard/sdl/Keyboard.cpp b/src/modules/keyboard/sdl/Keyboard.cpp
index 488632d6a..00b6812f7 100644
--- a/src/modules/keyboard/sdl/Keyboard.cpp
+++ b/src/modules/keyboard/sdl/Keyboard.cpp
@@ -51,12 +51,11 @@ bool Keyboard::hasKeyRepeat() const
 
 bool Keyboard::isDown(Key *keylist) const
 {
-	const Uint8 *keystate = SDL_GetKeyboardState(0);
-	std::map<Key, SDL_Keycode>::const_iterator it;
+	const Uint8 *keystate = SDL_GetKeyboardState(nullptr);
 
 	for (Key key = *keylist; key != KEY_MAX_ENUM; key = *(++keylist))
 	{
-		it = keys.find(key);
+		auto it = keys.find(key);
 		if (it != keys.end() && keystate[SDL_GetScancodeFromKey(it->second)])
 			return true;
 	}
diff --git a/src/modules/keyboard/sdl/Keyboard.h b/src/modules/keyboard/sdl/Keyboard.h
index 56271b801..9b7a5f2c4 100644
--- a/src/modules/keyboard/sdl/Keyboard.h
+++ b/src/modules/keyboard/sdl/Keyboard.h
@@ -56,6 +56,8 @@ public:
 
 private:
 
+	// Whether holding down a key triggers repeated key press events.
+	// The real implementation is in love::event::sdl::Event::Convert.
 	bool key_repeat;
 
 	static std::map<Key, SDL_Keycode> createKeyMap();
diff --git a/src/modules/keyboard/wrap_Keyboard.cpp b/src/modules/keyboard/wrap_Keyboard.cpp
index fc986b940..da46ba3d3 100644
--- a/src/modules/keyboard/wrap_Keyboard.cpp
+++ b/src/modules/keyboard/wrap_Keyboard.cpp
@@ -29,7 +29,7 @@ namespace love
 namespace keyboard
 {
 
-static Keyboard *instance = 0;
+static Keyboard *instance = nullptr;
 
 int w_setKeyRepeat(lua_State *L)
 {
@@ -87,7 +87,7 @@ static const luaL_Reg functions[] =
 
 extern "C" int luaopen_love_keyboard(lua_State *L)
 {
-	if (instance == 0)
+	if (instance == nullptr)
 	{
 		EXCEPT_GUARD(instance = new love::keyboard::sdl::Keyboard();)
 	}
diff --git a/src/modules/math/RandomGenerator.cpp b/src/modules/math/RandomGenerator.cpp
index 7c22a6e3f..6b14390f9 100644
--- a/src/modules/math/RandomGenerator.cpp
+++ b/src/modules/math/RandomGenerator.cpp
@@ -77,7 +77,7 @@ void RandomGenerator::setSeed(RandomGenerator::Seed newseed)
 {
 	// 0 xor 0 is still 0, so Xorshift can't generate new numbers.
 	if (newseed.b64 == 0)
-		throw love::Exception("Invalid random seed.");
+		throw love::Exception("Random seed cannot be 0.");
 
 	seed = newseed;
 	rng_state = seed;
diff --git a/src/modules/mouse/sdl/Cursor.cpp b/src/modules/mouse/sdl/Cursor.cpp
index 37dea9fb8..809cd6a45 100644
--- a/src/modules/mouse/sdl/Cursor.cpp
+++ b/src/modules/mouse/sdl/Cursor.cpp
@@ -30,7 +30,7 @@ namespace sdl
 {
 
 Cursor::Cursor(image::ImageData *data, int hotx, int hoty)
-	: cursor(0)
+	: cursor(nullptr)
 	, type(CURSORTYPE_IMAGE)
 	, systemType(CURSOR_MAX_ENUM)
 {
@@ -63,7 +63,7 @@ Cursor::Cursor(image::ImageData *data, int hotx, int hoty)
 }
 
 Cursor::Cursor(mouse::Cursor::SystemCursor cursortype)
-	: cursor(0)
+	: cursor(nullptr)
 	, type(CURSORTYPE_SYSTEM)
 	, systemType(cursortype)
 {
diff --git a/src/modules/mouse/sdl/Mouse.cpp b/src/modules/mouse/sdl/Mouse.cpp
index 74e86291e..22f88fb05 100644
--- a/src/modules/mouse/sdl/Mouse.cpp
+++ b/src/modules/mouse/sdl/Mouse.cpp
@@ -71,7 +71,7 @@ const char *Mouse::getName() const
 }
 
 Mouse::Mouse()
-	: curCursor(0)
+	: curCursor(nullptr)
 {
 }
 
@@ -187,7 +187,7 @@ void Mouse::setVisible(bool visible)
 
 bool Mouse::isDown(Button *buttonlist) const
 {
-	Uint32 buttonstate = SDL_GetMouseState(0, 0);
+	Uint32 buttonstate = SDL_GetMouseState(nullptr, nullptr);
 
 	for (Button button = *buttonlist; button != BUTTON_MAX_ENUM; button = *(++buttonlist))
 	{
diff --git a/src/modules/mouse/wrap_Cursor.cpp b/src/modules/mouse/wrap_Cursor.cpp
index bb245cfba..240aedb5f 100644
--- a/src/modules/mouse/wrap_Cursor.cpp
+++ b/src/modules/mouse/wrap_Cursor.cpp
@@ -36,7 +36,7 @@ int w_Cursor_getType(lua_State *L)
 	Cursor *cursor = luax_checkcursor(L, 1);
 
 	Cursor::CursorType ctype = cursor->getType();
-	const char *typestr = 0;
+	const char *typestr = nullptr;
 
 	if (ctype == Cursor::CURSORTYPE_IMAGE)
 		mouse::Cursor::getConstant(ctype, typestr);
diff --git a/src/modules/mouse/wrap_Mouse.cpp b/src/modules/mouse/wrap_Mouse.cpp
index 1ba9b2bc0..ea68f31d3 100644
--- a/src/modules/mouse/wrap_Mouse.cpp
+++ b/src/modules/mouse/wrap_Mouse.cpp
@@ -30,11 +30,11 @@ namespace love
 namespace mouse
 {
 
-static Mouse *instance = 0;
+static Mouse *instance = nullptr;
 
 int w_newCursor(lua_State *L)
 {
-	Cursor *cursor = 0;
+	Cursor *cursor = nullptr;
 
 	if (lua_isstring(L, 1) || luax_istype(L, 1, FILESYSTEM_FILE_T) || luax_istype(L, 1, FILESYSTEM_FILE_DATA_T))
 		luax_convobj(L, 1, "image", "newImageData");
@@ -212,7 +212,7 @@ static const lua_CFunction types[] =
 
 extern "C" int luaopen_love_mouse(lua_State *L)
 {
-	if (instance == 0)
+	if (instance == nullptr)
 	{
 		EXCEPT_GUARD(instance = new love::mouse::sdl::Mouse();)
 	}
diff --git a/src/modules/physics/box2d/Physics.cpp b/src/modules/physics/box2d/Physics.cpp
index a76aca20f..a016c7a05 100644
--- a/src/modules/physics/box2d/Physics.cpp
+++ b/src/modules/physics/box2d/Physics.cpp
@@ -133,12 +133,12 @@ int Physics::newPolygonShape(lua_State *L)
 int Physics::newChainShape(lua_State *L)
 {
 	int argc = lua_gettop(L)-1; // first argument is looping
+	if (argc % 2 != 0)
+		return luaL_error(L, "Number of vertex components must be a multiple of two.");
+
 	int vcount = (int)argc/2;
-
 	b2ChainShape *s = new b2ChainShape();
-
 	bool loop = luax_toboolean(L, 1);
-
 	b2Vec2 *vecs = new b2Vec2[vcount];
 
 	for (int i = 0; i<vcount; i++)
@@ -166,7 +166,6 @@ int Physics::newChainShape(lua_State *L)
 	delete[] vecs;
 
 	ChainShape *c = new ChainShape(s);
-
 	luax_pushtype(L, "ChainShape", PHYSICS_CHAIN_SHAPE_T, c);
 	return 1;
 }
diff --git a/src/modules/system/wrap_System.cpp b/src/modules/system/wrap_System.cpp
index 6cea1be76..a5a2e9939 100644
--- a/src/modules/system/wrap_System.cpp
+++ b/src/modules/system/wrap_System.cpp
@@ -27,7 +27,7 @@ namespace love
 namespace system
 {
 
-static System *instance = 0;
+static System *instance = nullptr;
 
 int w_getOS(lua_State *L)
 {
@@ -99,7 +99,7 @@ static const luaL_Reg functions[] =
 
 extern "C" int luaopen_love_system(lua_State *L)
 {
-	if (instance == 0)
+	if (instance == nullptr)
 	{
 		instance = new love::system::sdl::System();
 	}
@@ -111,7 +111,7 @@ extern "C" int luaopen_love_system(lua_State *L)
 	w.name = "system";
 	w.flags = MODULE_T;
 	w.functions = functions;
-	w.types = 0;
+	w.types = nullptr;
 
 	return luax_register_module(L, w);
 }
diff --git a/src/modules/thread/Channel.h b/src/modules/thread/Channel.h
index e54cb57e4..3e9781d12 100644
--- a/src/modules/thread/Channel.h
+++ b/src/modules/thread/Channel.h
@@ -26,13 +26,14 @@
 #include <string>
 
 // LOVE
-#include <common/Variant.h>
-#include <thread/threads.h>
+#include "common/Variant.h"
+#include "threads.h"
 
 namespace love
 {
 namespace thread
 {
+
 class Channel : public love::Object
 {
 // FOR WRAPPER USE ONLY
@@ -40,8 +41,10 @@ friend void retainVariant(Channel *, Variant *);
 friend void releaseVariant(Channel *, Variant *);
 
 public:
+
 	Channel();
 	~Channel();
+
 	static Channel *getChannel(const std::string &name);
 
 	unsigned long push(Variant *var);
@@ -56,6 +59,7 @@ public:
 	void release();
 
 private:
+
 	Channel(const std::string &name);
 	void lockMutex();
 	void unlockMutex();
@@ -68,7 +72,9 @@ private:
 
 	unsigned long sent;
 	unsigned long received;
+
 }; // Channel
+
 } // thread
 } // love
 
diff --git a/src/modules/thread/LuaThread.cpp b/src/modules/thread/LuaThread.cpp
index 807994e1e..b4e7ff1c0 100644
--- a/src/modules/thread/LuaThread.cpp
+++ b/src/modules/thread/LuaThread.cpp
@@ -38,6 +38,7 @@ LuaThread::LuaThread(const std::string &name, love::Data *code)
 	, nargs(0)
 {
 	code->retain();
+	threadName = name;
 }
 
 LuaThread::~LuaThread()
diff --git a/src/modules/thread/LuaThread.h b/src/modules/thread/LuaThread.h
index e7eaab6e6..e5722a750 100644
--- a/src/modules/thread/LuaThread.h
+++ b/src/modules/thread/LuaThread.h
@@ -25,15 +25,16 @@
 #include <string>
 
 // LOVE
-#include <common/Data.h>
-#include <common/Object.h>
-#include <common/Variant.h>
-#include <thread/threads.h>
+#include "common/Data.h"
+#include "common/Object.h"
+#include "common/Variant.h"
+#include "threads.h"
 
 namespace love
 {
 namespace thread
 {
+
 class LuaThread : public love::Object, public Threadable
 {
 public:
@@ -55,7 +56,9 @@ private:
 
 	Variant **args;
 	int nargs;
-};
+
+}; // LuaThread
+
 } // thread
 } // love
 
diff --git a/src/modules/thread/Thread.h b/src/modules/thread/Thread.h
index 23c82b128..7adaeda9d 100644
--- a/src/modules/thread/Thread.h
+++ b/src/modules/thread/Thread.h
@@ -22,8 +22,8 @@
 #define LOVE_THREAD_THREAD_H
 
 // LOVE
-#include <common/runtime.h>
-#include <common/Object.h>
+#include "common/runtime.h"
+#include "common/Object.h"
 
 namespace love
 {
diff --git a/src/modules/thread/sdl/Thread.cpp b/src/modules/thread/sdl/Thread.cpp
index 416846331..c6a6dc619 100644
--- a/src/modules/thread/sdl/Thread.cpp
+++ b/src/modules/thread/sdl/Thread.cpp
@@ -51,7 +51,7 @@ bool Thread::start()
 		return false;
 	if (thread) // Clean old handle up
 		SDL_WaitThread(thread, 0);
-	thread = SDL_CreateThread(thread_runner, NULL, this);
+	thread = SDL_CreateThread(thread_runner, t->getThreadName(), this);
 	running = (thread != 0);
 	return running;
 }
diff --git a/src/modules/thread/sdl/Thread.h b/src/modules/thread/sdl/Thread.h
index ac2a860b2..ea1f48dee 100644
--- a/src/modules/thread/sdl/Thread.h
+++ b/src/modules/thread/sdl/Thread.h
@@ -22,7 +22,7 @@
 #define LOVE_THREAD_SDL_THREAD_H
 
 // LOVE
-#include <thread/Thread.h>
+#include "thread/Thread.h"
 #include "threads.h"
 
 // SDL
@@ -34,6 +34,7 @@ namespace thread
 {
 namespace sdl
 {
+
 class Thread : public thread::Thread
 {
 public:
diff --git a/src/modules/thread/sdl/threads.cpp b/src/modules/thread/sdl/threads.cpp
index 80bec15f4..f40cc265d 100644
--- a/src/modules/thread/sdl/threads.cpp
+++ b/src/modules/thread/sdl/threads.cpp
@@ -27,6 +27,7 @@ namespace thread
 {
 namespace sdl
 {
+
 Mutex::Mutex()
 {
 	mutex = SDL_CreateMutex();
@@ -81,6 +82,11 @@ bool Conditional::wait(thread::Mutex *_mutex, int timeout)
 
 } // sdl
 
+
+/**
+ * Implementations of the functions declared in src/modules/threads.h.
+ **/
+
 thread::Mutex *newMutex()
 {
 	return new sdl::Mutex();
diff --git a/src/modules/thread/sdl/threads.h b/src/modules/thread/sdl/threads.h
index 9521196c0..9916784db 100644
--- a/src/modules/thread/sdl/threads.h
+++ b/src/modules/thread/sdl/threads.h
@@ -21,8 +21,8 @@
 #ifndef LOVE_THREAD_SDL_THREADS_H
 #define LOVE_THREAD_SDL_THREADS_H
 
-#include <common/config.h>
-#include <thread/threads.h>
+#include "common/config.h"
+#include "thread/threads.h"
 
 #include <SDL_thread.h>
 
@@ -32,11 +32,13 @@ namespace thread
 {
 namespace sdl
 {
+
 class Conditional;
 
 class Mutex : public thread::Mutex
 {
 public:
+
 	Mutex();
 	~Mutex();
 
@@ -44,15 +46,18 @@ public:
 	void unlock();
 
 private:
+
 	SDL_mutex *mutex;
 	Mutex(const Mutex&/* mutex*/) {}
 
 	friend class Conditional;
-};
+
+}; // Mutex
 
 class Conditional : public thread::Conditional
 {
 public:
+
 	Conditional();
 	~Conditional();
 
@@ -61,8 +66,10 @@ public:
 	bool wait(thread::Mutex *mutex, int timeout=-1);
 
 private:
+
 	SDL_cond *cond;
-};
+
+}; // Conditional
 
 } // sdl
 } // thread
diff --git a/src/modules/thread/threads.cpp b/src/modules/thread/threads.cpp
index 631b75b53..9abeb5899 100644
--- a/src/modules/thread/threads.cpp
+++ b/src/modules/thread/threads.cpp
@@ -99,5 +99,10 @@ bool Threadable::isRunning() const
 	return owner->isRunning();
 }
 
+const char *Threadable::getThreadName() const
+{
+	return threadName.empty() ? nullptr : threadName.c_str();
+}
+
 } // thread
 } // love
diff --git a/src/modules/thread/threads.h b/src/modules/thread/threads.h
index 7c1a26c18..516abae98 100644
--- a/src/modules/thread/threads.h
+++ b/src/modules/thread/threads.h
@@ -21,9 +21,13 @@
 #ifndef LOVE_THREAD_THREADS_H
 #define LOVE_THREAD_THREADS_H
 
-#include <common/config.h>
+// LOVE
+#include "common/config.h"
 #include "Thread.h"
 
+// C++
+#include <string>
+
 namespace love
 {
 namespace thread
@@ -83,9 +87,13 @@ public:
 	bool start();
 	void wait();
 	bool isRunning() const;
+	const char *getThreadName() const;
 
 protected:
+
 	Thread *owner;
+	std::string threadName;
+
 };
 
 Mutex *newMutex();