#include <stdexcept>
+#include <msp/gl/extensions/arb_shader_objects.h>
+#include <msp/gl/extensions/arb_uniform_buffer_object.h>
+#include "buffer.h"
#include "color.h"
+#include "error.h"
#include "matrix.h"
#include "uniform.h"
#include "uniformblock.h"
namespace Msp {
namespace GL {
+UniformBlock::UniformBlock():
+ size(0),
+ buf_range(0)
+{
+ static Require _req(ARB_shader_objects);
+}
+
+UniformBlock::UniformBlock(unsigned s):
+ size(s),
+ buf_range(0)
+{
+ static Require _req(ARB_uniform_buffer_object);
+
+ if(!size)
+ throw invalid_argument("UniformBlock::UniformBlock");
+ data.resize(size);
+}
+
+UniformBlock::~UniformBlock()
+{
+ delete buf_range;
+}
+
+unsigned UniformBlock::get_alignment() const
+{
+ return BufferRange::get_uniform_buffer_alignment();
+}
+
+void UniformBlock::location_changed(Buffer *buf, unsigned off, unsigned) const
+{
+ delete buf_range;
+ buf_range = new BufferRange(*buf, off, size);
+}
+
void UniformBlock::attach(int index, const Uniform &uni)
{
+ if(size)
+ throw invalid_operation("UniformBlock::attach");
+
uniforms[index] = &uni;
}
+void UniformBlock::attach(const Program::UniformInfo &info, const Uniform &uni)
+{
+ if(size)
+ {
+ uni.store(info, &data[info.location]);
+ dirty = true;
+ }
+ else
+ uniforms[info.location] = &uni;
+}
+
void UniformBlock::apply(int index) const
{
- if(index>=0)
- throw logic_error("GL_ARB_uniform_buffer_object support not implemented yet");
+ if((index>=0) != (size>0))
+ throw invalid_operation("UniformBlock::apply");
+
+ if(size)
+ {
+ if(!get_buffer())
+ throw invalid_operation("UniformBlock::apply");
- for(map<int, const Uniform *>::const_iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
- i->second->apply(i->first);
+ refresh();
+ buf_range->bind_to(UNIFORM_BUFFER, index);
+ }
+ else
+ {
+ for(map<int, const Uniform *>::const_iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
+ i->second->apply(i->first);
+ }
}
} // namespace GL