#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"
namespace Msp {
namespace GL {
-UniformBlock::UniformBlock()
-{ }
+UniformBlock::UniformBlock():
+ size(0),
+ buf_range(0)
+{
+ static Require _req(ARB_shader_objects);
+}
UniformBlock::UniformBlock(unsigned s):
size(s),
- data(size)
-{ }
+ 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::offset_changed()
+{
+ delete buf_range;
+ buf_range = 0;
+}
+
+void UniformBlock::upload_data(char *target) const
+{
+ if(!buf_range)
+ buf_range = new BufferRange(*get_mutable_buffer(), get_offset(), size);
+
+ if(target)
+ copy(data.begin(), data.end(), target);
+ else
+ buf_range->data(&data[0]);
+}
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)
{
- uniforms[info.location] = &uni;
- if(buffer)
+ if(size)
{
uni.store(info, &data[info.location]);
dirty = true;
}
+ else
+ uniforms[info.location] = &uni;
}
void UniformBlock::apply(int index) const
{
- if((index>=0) != (buffer!=0))
+ if((index>=0) != (size>0))
throw invalid_operation("UniformBlock::apply");
- if(buffer)
+ if(size)
{
+ if(!get_buffer())
+ throw invalid_operation("UniformBlock::apply");
+
if(dirty)
- {
- update_buffer_data();
- if(!buf_range)
- buf_range = new BufferRange(*buffer, buffer_offset, size);
- }
+ update_buffer();
buf_range->bind_to(UNIFORM_BUFFER, index);
}
else