+#include "deviceinfo.h"
+#include "error.h"
+#include "frameformat.h"
+
+using namespace std;
+
+namespace Msp {
+namespace GL {
+
+FrameFormat::FrameFormat():
+ count(0),
+ samples(1)
+{ }
+
+FrameFormat::FrameFormat(FrameAttachment fa):
+ count(1),
+ samples(1)
+{
+ attachments[0] = fa;
+}
+
+FrameFormat FrameFormat::operator,(FrameAttachment fa) const
+{
+ if(count>=MAX_ATTACHMENTS)
+ throw invalid_operation("FrameFormat::operator,");
+
+ FrameFormat result = *this;
+ result.attachments[result.count++] = fa;
+
+ return result;
+}
+
+FrameFormat FrameFormat::operator,(PixelFormat pf) const
+{
+ if(!count)
+ throw invalid_operation("FrameFormat::operator,");
+
+ FrameFormat r = *this;
+ UInt16 &fa = r.attachments[r.count-1];
+ fa = make_typed_attachment(static_cast<FrameAttachment>(fa), pf);
+
+ return r;
+}
+
+FrameFormat FrameFormat::operator,(unsigned index) const
+{
+ if(!count)
+ throw invalid_operation("FrameFormat::operator,");
+
+ FrameFormat r = *this;
+ UInt16 &fa = r.attachments[r.count-1];
+ fa = make_indexed_attachment(static_cast<FrameAttachment>(fa), index);
+
+ return r;
+}
+
+FrameFormat &FrameFormat::set_samples(unsigned s)
+{
+ samples = s;
+ return *this;
+}
+
+int FrameFormat::index(FrameAttachment fa) const
+{
+ for(unsigned i=0; i<count; ++i)
+ if(get_attach_point(attachments[i])==get_attach_point(fa))
+ return i;
+ return -1;
+}
+
+
+FrameAttachment make_typed_attachment(FrameAttachment fa, PixelFormat pf)
+{
+ PixelComponents comp = get_components(pf);
+ if(get_attach_point(fa)==get_attach_point(DEPTH_ATTACHMENT))
+ {
+ if(comp!=DEPTH_COMPONENT)
+ throw invalid_argument("make_typed_attachment");
+ }
+ else if(get_attach_point(fa)==get_attach_point(STENCIL_ATTACHMENT))
+ {
+ if(comp!=STENCIL_INDEX)
+ throw invalid_argument("make_typed_attachment");
+ }
+ else
+ {
+ if(comp!=RED && comp!=RG && comp!=RGB && comp!=RGBA)
+ throw invalid_argument("make_typed_attachment");
+ }
+
+ DataType type = get_component_type(pf);
+ return static_cast<FrameAttachment>((fa&0xFC00) | (is_float(type)*0x80) | get_type_size(type)<<4 | get_component_count(comp));
+}
+
+FrameAttachment make_indexed_attachment(FrameAttachment fa, unsigned i)
+{
+ if(get_attach_point(fa)==get_attach_point(COLOR_ATTACHMENT))
+ {
+ if(i>61)
+ throw out_of_range("make_indexed_attachment");
+ return static_cast<FrameAttachment>(fa+(i<<10));
+ }
+ else
+ throw invalid_argument("make_indexed_attachment");
+}
+
+PixelFormat get_attachment_pixelformat(UInt16 fa)
+{
+ PixelComponents comp;
+ if(get_attach_point(fa)==get_attach_point(DEPTH_ATTACHMENT))
+ comp = DEPTH_COMPONENT;
+ else if(get_attach_point(fa)==get_attach_point(STENCIL_ATTACHMENT))
+ comp = STENCIL_INDEX;
+ else
+ comp = static_cast<PixelComponents>(fa&7);
+
+ DataType type;
+ if(fa&0x80)
+ type = static_cast<DataType>((fa&0x70)>>4 | 0x300);
+ else
+ type = static_cast<DataType>((fa&0x70)>>4);
+
+ return make_pixelformat(comp, type);
+}
+
+GLenum get_gl_attachment(FrameAttachment fa)
+{
+ if(get_attach_point(fa)==get_attach_point(DEPTH_ATTACHMENT))
+ return GL_DEPTH_ATTACHMENT;
+ else if(get_attach_point(fa)==get_attach_point(STENCIL_ATTACHMENT))
+ return GL_STENCIL_ATTACHMENT;
+ else
+ return GL_COLOR_ATTACHMENT0+get_attach_point(fa);
+}
+
+} // namespace GL
+} // namespace Msp