From: Mikko Rasa <tdb@tdb.fi>
Date: Tue, 21 Aug 2012 10:12:03 +0000 (+0300)
Subject: Implement uniform arrays
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=commitdiff_plain;h=0070eec93efbf27bcc70720141d8730b059eb964

Implement uniform arrays
---

diff --git a/source/programdata.cpp b/source/programdata.cpp
index 43767bf9..0a2ec605 100644
--- a/source/programdata.cpp
+++ b/source/programdata.cpp
@@ -120,6 +120,31 @@ void ProgramData::uniform_matrix4(const string &name, const Matrix &m)
 	uniform_matrix4(name, v);
 }
 
+void ProgramData::uniform1_array(const string &name, unsigned n, const float *v)
+{
+	uniform(name, new UniformArray<Uniform1f>(n, v));
+}
+
+void ProgramData::uniform2_array(const string &name, unsigned n, const float *v)
+{
+	uniform(name, new UniformArray<Uniform2f>(n, v));
+}
+
+void ProgramData::uniform3_array(const string &name, unsigned n, const float *v)
+{
+	uniform(name, new UniformArray<Uniform3f>(n, v));
+}
+
+void ProgramData::uniform4_array(const string &name, unsigned n, const float *v)
+{
+	uniform(name, new UniformArray<Uniform4f>(n, v));
+}
+
+void ProgramData::uniform_matrix4_array(const string &name, unsigned n, const float *v)
+{
+	uniform(name, new UniformArray<UniformMatrix4x4f>(n, v));
+}
+
 const UniformBlock &ProgramData::get_block(const Program &prog) const
 {
 	if(modified)
diff --git a/source/programdata.h b/source/programdata.h
index 6d0ebf8a..d74017b5 100644
--- a/source/programdata.h
+++ b/source/programdata.h
@@ -71,6 +71,11 @@ public:
 	void uniform4(const std::string &, const float *);
 	void uniform_matrix4(const std::string &, const float *);
 	void uniform_matrix4(const std::string &, const Matrix &);
+	void uniform1_array(const std::string &, unsigned, const float *);
+	void uniform2_array(const std::string &, unsigned, const float *);
+	void uniform3_array(const std::string &, unsigned, const float *);
+	void uniform4_array(const std::string &, unsigned, const float *);
+	void uniform_matrix4_array(const std::string &, unsigned, const float *);
 
 	const UniformBlock &get_block(const Program &) const;
 
diff --git a/source/uniform.cpp b/source/uniform.cpp
index 688052ff..ac866cf5 100644
--- a/source/uniform.cpp
+++ b/source/uniform.cpp
@@ -5,41 +5,41 @@ namespace Msp {
 namespace GL {
 
 template<>
-void UniformScalar<int>::apply(int index) const
+void UniformScalar<int>::apply(int index, unsigned size, const int *value)
 {
-	glUniform1iARB(index, value);
+	glUniform1ivARB(index, size, value);
 }
 
 template<>
-void UniformScalar<float>::apply(int index) const
+void UniformScalar<float>::apply(int index, unsigned size, const float *value)
 {
-	glUniform1fARB(index, value);
+	glUniform1fvARB(index, size, value);
 }
 
 
 template<>
-void UniformVector<float, 2>::apply(int index) const
+void UniformVector<float, 2>::apply(int index, unsigned size, const float *value)
 {
-	glUniform2fvARB(index, 1, value);
+	glUniform2fvARB(index, size, value);
 }
 
 template<>
-void UniformVector<float, 3>::apply(int index) const
+void UniformVector<float, 3>::apply(int index, unsigned size, const float *value)
 {
-	glUniform3fvARB(index, 1, value);
+	glUniform3fvARB(index, size, value);
 }
 
 template<>
-void UniformVector<float, 4>::apply(int index) const
+void UniformVector<float, 4>::apply(int index, unsigned size, const float *value)
 {
-	glUniform4fvARB(index, 1, value);
+	glUniform4fvARB(index, size, value);
 }
 
 
 template<>
-void UniformMatrix<float, 4, 4>::apply(int index) const
+void UniformMatrix<float, 4, 4>::apply(int index, unsigned size, const float *value)
 {
-	glUniformMatrix4fvARB(index, 1, false, value);
+	glUniformMatrix4fvARB(index, size, false, value);
 }
 
 } // namespace GL
diff --git a/source/uniform.h b/source/uniform.h
index 32779ced..216d3be6 100644
--- a/source/uniform.h
+++ b/source/uniform.h
@@ -34,7 +34,10 @@ private:
 public:
 	UniformScalar(Type v): value(v) { }
 
-	virtual void apply(int index) const;
+	virtual void apply(int index) const
+	{ apply(index, 1, &value); }
+
+	static void apply(int, unsigned, const T *);
 
 	virtual UniformScalar *clone() const
 	{ return new UniformScalar(value); }
@@ -58,7 +61,10 @@ public:
 	UniformVector(const T *vp)
 	{ std::copy(vp, vp+vecsize, value); }
 
-	virtual void apply(int index) const;
+	virtual void apply(int index) const
+	{ apply(index, 1, value); }
+
+	static void apply(int index, unsigned size, const T *value);
 
 	virtual UniformVector *clone() const
 	{ return new UniformVector(value); }
@@ -83,7 +89,10 @@ public:
 	UniformMatrix(const T *vp)
 	{ std::copy(vp, vp+rows*cols, value); }
 
-	virtual void apply(int index) const;
+	virtual void apply(int index) const
+	{ apply(index, 1, value); }
+
+	static void apply(int index, unsigned size, const T *value);
 
 	virtual UniformMatrix *clone() const
 	{ return new UniformMatrix(value); }
@@ -91,6 +100,32 @@ public:
 
 typedef UniformMatrix<float, 4, 4> UniformMatrix4x4f;
 
+
+template<typename T>
+class UniformArray: public Uniform
+{
+private:
+	typedef typename T::BaseType BaseType;
+
+	BaseType *values;
+	unsigned size;
+
+public:
+	UniformArray(unsigned n, const BaseType *vp):
+		size(n)
+	{
+		unsigned elemsize = sizeof(typename T::Type)/sizeof(typename T::BaseType);
+		values = new BaseType[elemsize*size];
+		std::copy(vp, vp+elemsize*size, values);
+	}
+
+	virtual void apply(int index) const
+	{ T::apply(index, size, values); }
+
+	virtual UniformArray *clone() const
+	{ return new UniformArray(size, values); }
+};
+
 } // namespace GL
 } // namespace Msp