Rearrange soucre files into subdirectories

[libs/gl.git] / source / core / uniform.h

diff --git a/source/core/uniform.h b/source/core/uniform.h
new file mode 100644 (file)
index 0000000..bc78bab
--- /dev/null
+++ b/source/core/uniform.h
@@ -0,0 +1,193 @@
+#ifndef MSP_GL_UNIFORM_H_
+#define MSP_GL_UNIFORM_H_
+
+#include <algorithm>
+#include "program.h"
+
+namespace Msp {
+namespace GL {
+
+class Uniform
+{
+protected:
+       Uniform() { }
+private:
+       Uniform(const Uniform &);
+       Uniform &operator=(const Uniform &);
+public:
+       virtual ~Uniform() { }
+
+       virtual void apply(int) const = 0;
+       virtual void store(const Program::UniformInfo &, void *) const = 0;
+       virtual Uniform *clone() const = 0;
+};
+
+
+template<typename T>
+class UniformScalar: public Uniform
+{
+public:
+       typedef T BaseType;
+       typedef T Type;
+
+private:
+       Type value;
+
+public:
+       UniformScalar(Type v): value(v) { }
+
+       void set(Type v) { value = v; }
+
+       Type get() const { return value; }
+
+       virtual void apply(int index) const
+       { apply(index, 1, &value); }
+
+       static void apply(int, unsigned, const T *);
+
+       virtual void store(const Program::UniformInfo &info, void *buffer) const
+       { store(info, buffer, &value); }
+
+       static void store(const Program::UniformInfo &, void *buffer, const T *value)
+       { *reinterpret_cast<T *>(buffer) = *value; }
+
+       virtual UniformScalar *clone() const
+       { return new UniformScalar(value); }
+};
+
+typedef UniformScalar<int> Uniform1i;
+typedef UniformScalar<float> Uniform1f;
+
+
+template<typename T, unsigned vecsize>
+class UniformVector: public Uniform
+{
+public:
+       typedef T BaseType;
+       typedef T Type[vecsize];
+
+private:
+       Type value;
+
+public:
+       UniformVector(const T *vp) { set(vp); }
+
+       void set(const T *vp)
+       { std::copy(vp, vp+vecsize, value); }
+
+       BaseType get(unsigned i) const { return value[i]; }
+
+       virtual void apply(int index) const
+       { apply(index, 1, value); }
+
+       static void apply(int index, unsigned size, const T *value);
+
+       virtual void store(const Program::UniformInfo &info, void *buffer) const
+       { store(info, buffer, value); }
+
+       static void store(const Program::UniformInfo &, void *buffer, const T *value)
+       { std::copy(value, value+vecsize, reinterpret_cast<T *>(buffer)); }
+
+       virtual UniformVector *clone() const
+       { return new UniformVector(value); }
+};
+
+typedef UniformVector<int, 2> Uniform2i;
+typedef UniformVector<float, 2> Uniform2f;
+typedef UniformVector<int, 3> Uniform3i;
+typedef UniformVector<float, 3> Uniform3f;
+typedef UniformVector<int, 4> Uniform4i;
+typedef UniformVector<float, 4> Uniform4f;
+
+
+template<typename T, unsigned rows, unsigned cols>
+class UniformMatrix: public Uniform
+{
+public:
+       typedef T BaseType;
+       typedef T Type[rows*cols];
+
+private:
+       Type value;
+
+public:
+       UniformMatrix(const T *vp) { set(vp); }
+
+       void set(const T *vp)
+       { std::copy(vp, vp+rows*cols, value); }
+
+       virtual void apply(int index) const
+       { apply(index, 1, value); }
+
+       static void apply(int index, unsigned size, const T *value);
+
+       virtual void store(const Program::UniformInfo &info, void *buffer) const
+       { store(info, buffer, value); }
+
+       static void store(const Program::UniformInfo &info, void *buffer, const T *value)
+       {
+               for(unsigned i=0; i<cols; ++i)
+                       UniformVector<T, rows>::store(info, reinterpret_cast<char *>(buffer)+i*info.matrix_stride, value+i*rows);
+       }
+
+       virtual UniformMatrix *clone() const
+       { return new UniformMatrix(value); }
+};
+
+// The naming of these types follows the OpenGL convention of columns x rows
+typedef UniformMatrix<float, 2, 2> UniformMatrix2x2f;
+typedef UniformMatrix<float, 2, 3> UniformMatrix3x2f;
+typedef UniformMatrix<float, 2, 4> UniformMatrix4x2f;
+typedef UniformMatrix<float, 3, 2> UniformMatrix2x3f;
+typedef UniformMatrix<float, 3, 3> UniformMatrix3x3f;
+typedef UniformMatrix<float, 3, 4> UniformMatrix4x3f;
+typedef UniformMatrix<float, 4, 2> UniformMatrix2x4f;
+typedef UniformMatrix<float, 4, 3> UniformMatrix3x4f;
+typedef UniformMatrix<float, 4, 4> UniformMatrix4x4f;
+
+
+template<typename T>
+class UniformArray: public Uniform
+{
+private:
+       typedef typename T::BaseType BaseType;
+       enum { elemsize = sizeof(typename T::Type)/sizeof(typename T::BaseType) };
+
+       unsigned size_;
+       BaseType *values;
+
+public:
+       UniformArray(unsigned n, const BaseType *vp):
+               size_(n),
+               values(new BaseType[elemsize*size_])
+       {
+               set(vp);
+       }
+
+       ~UniformArray()
+       {
+               delete[] values;
+       }
+
+       unsigned size() const { return size_; }
+
+       void set(const BaseType *vp)
+       { std::copy(vp, vp+elemsize*size_, values); }
+
+       virtual void apply(int index) const
+       { T::apply(index, size_, values); }
+
+       virtual void store(const Program::UniformInfo &info, void *buffer) const
+       {
+               for(unsigned i=0; i<size_; ++i)
+                       T::store(info, reinterpret_cast<char *>(buffer)+i*info.array_stride, values+i*elemsize);
+       }
+
+       virtual UniformArray *clone() const
+       { return new UniformArray(size_, values); }
+};
+
+} // namespace GL
+} // namespace Msp
+
+#endif