#include <stdexcept>
-#include <msp/gl/extensions/arb_buffer_storage.h>
-#include <msp/gl/extensions/arb_direct_state_access.h>
-#include <msp/gl/extensions/arb_map_buffer_range.h>
#include <msp/strings/format.h>
#include "buffer.h"
#include "error.h"
-#include "misc.h"
-#include "vertexsetup.h"
using namespace std;
namespace Msp {
namespace GL {
-const Buffer *Buffer::bound[5] = { 0, 0, 0, 0, 0 };
-BufferType buffer_types[] = { ARRAY_BUFFER, ELEMENT_ARRAY_BUFFER, PIXEL_PACK_BUFFER, PIXEL_UNPACK_BUFFER, UNIFORM_BUFFER };
-
-Buffer::Buffer(BufferType t):
- type(t),
- size(0)
-{
- require_buffer_type(type);
-
- if(ARB_direct_state_access)
- glCreateBuffers(1, &id);
- else
- glGenBuffers(1, &id);
-}
-
-Buffer::~Buffer()
-{
- for(unsigned i=0; i<5; ++i)
- if(bound[i]==this)
- unbind_from(buffer_types[i]);
- glDeleteBuffers(1, &id);
-}
-
-void Buffer::require_buffer_type(BufferType type)
-{
- static Require _req_vbo(ARB_vertex_buffer_object);
- if(type==PIXEL_PACK_BUFFER || type==PIXEL_UNPACK_BUFFER)
- static Require _req_pbo(ARB_pixel_buffer_object);
- else if(type==UNIFORM_BUFFER)
- static Require _req_ubo(ARB_uniform_buffer_object);
-}
-
-void Buffer::storage(unsigned sz)
+void Buffer::storage(size_t sz, BufferUsage u)
{
if(size>0)
- throw invalid_operation("Buffer::storage");
+ {
+ if(sz!=size)
+ throw incompatible_data("Buffer::storage");
+ return;
+ }
if(sz==0)
throw invalid_argument("Buffer::storage");
size = sz;
- if(ARB_buffer_storage)
- {
- static const int flags = GL_MAP_READ_BIT|GL_MAP_WRITE_BIT|GL_DYNAMIC_STORAGE_BIT;
- if(ARB_direct_state_access)
- glNamedBufferStorage(id, size, 0, flags);
- else
- {
- BindRestore _bind(this, type);
- glBufferStorage(type, size, 0, flags);
- }
- }
-}
+ usage = u;
-void Buffer::set_usage(BufferUsage)
-{
+ allocate();
}
void Buffer::data(const void *d)
{
- if(size==0)
- throw invalid_operation("Buffer::data");
-
- if(ARB_buffer_storage)
- return sub_data(0, size, d);
-
- if(ARB_direct_state_access)
- glNamedBufferData(id, size, d, STATIC_DRAW);
- else
- {
- BindRestore _bind(this, type);
- glBufferData(type, size, d, STATIC_DRAW);
- }
+ return sub_data(0, size, d);
}
-void Buffer::data(unsigned sz, const void *d)
+void Buffer::sub_data(size_t off, size_t sz, const void *d)
{
- if(size==0)
- storage(sz);
- else if(sz!=size)
- throw incompatible_data("Buffer::data");
-
- data(d);
+ check_sub_data(off, sz, "Buffer::sub_data");
+ BufferBackend::sub_data(off, sz, d);
}
-void Buffer::sub_data(unsigned off, unsigned sz, const void *d)
+Buffer::AsyncTransfer Buffer::sub_data_async(size_t off, size_t sz)
{
- if(ARB_direct_state_access)
- glNamedBufferSubData(id, off, sz, d);
- else
- {
- BindRestore _bind(this, type);
- glBufferSubData(type, off, sz, d);
- }
+ check_sub_data(off, sz, "Buffer::sub_data_async");
+ return AsyncTransfer(*this, off, sz);
}
-void Buffer::require_size(unsigned req_sz) const
+void Buffer::check_sub_data(size_t off, size_t sz, const char *func)
{
- if(size<req_sz)
- throw buffer_too_small(format("buffer has %d bytes; %d required", size, req_sz));
+ if(size==0)
+ throw invalid_operation(func);
+ if(off>get_total_size() || off%size+sz>size)
+ throw out_of_range(func);
}
-BufferRange *Buffer::create_range(unsigned s, unsigned o)
+void Buffer::require_size(size_t req_sz) const
{
- return new BufferRange(*this, s, o);
+ if(size<req_sz)
+ throw buffer_too_small(format("buffer has %d bytes; %d required", size, req_sz));
}
void *Buffer::map()
{
- if(ARB_map_buffer_range)
- {
- if(ARB_direct_state_access)
- return glMapNamedBufferRange(id, 0, size, GL_MAP_READ_BIT|GL_MAP_WRITE_BIT);
- else
- {
- BindRestore _bind(this, type);
- return glMapBufferRange(type, 0, size, GL_MAP_READ_BIT|GL_MAP_WRITE_BIT);
- }
- }
- else if(ARB_direct_state_access)
- return glMapNamedBuffer(id, GL_READ_WRITE);
- else if(OES_mapbuffer)
- {
- BindRestore _bind(this, type);
- return glMapBuffer(type, GL_READ_WRITE);
- }
- else
+ if(size==0 || !can_map() || mapped)
throw invalid_operation("Buffer::map");
+ void *result = BufferBackend::map();
+ mapped = true;
+ return result;
}
bool Buffer::unmap()
{
- // TODO check if it's mapped
- if(ARB_direct_state_access)
- return glUnmapNamedBuffer(id);
- else if(OES_mapbuffer)
- {
- BindRestore _bind(this, type);
- return glUnmapBuffer(type);
- }
- else
- return true;
+ if(size==0 || !can_map() || !mapped)
+ throw invalid_operation("Buffer::unmap");
+ bool result = BufferBackend::unmap();
+ mapped = false;
+ return result;
}
-void Buffer::bind_to(BufferType t) const
-{
- if(t!=type)
- require_buffer_type(t);
- if(t==ELEMENT_ARRAY_BUFFER)
- if(const VertexSetup *vs = VertexSetup::current())
- {
- // Don't change the binding in a vertex array object
- if(this==vs->get_index_buffer())
- return;
- throw invalid_operation("Buffer::bind_to(ELEMENT_ARRAY_BUFFER)");
- }
- if(set_current(t, this))
- glBindBuffer(t, id);
-}
-
-const Buffer *Buffer::current(BufferType t)
-{
- if(t==ELEMENT_ARRAY_BUFFER)
- if(const VertexSetup *vs = VertexSetup::current())
- return vs->get_index_buffer();
- return binding(t);
-}
-
-void Buffer::unbind_from(BufferType type)
-{
- if(type==ELEMENT_ARRAY_BUFFER && VertexSetup::current())
- throw invalid_operation("Buffer::unbind_from(ELEMENT_ARRAY_BUFFER)");
- if(set_current(type, 0))
- glBindBuffer(type, 0);
-}
-const Buffer *&Buffer::binding(BufferType type)
-{
- switch(type)
- {
- case ARRAY_BUFFER: return bound[0];
- case ELEMENT_ARRAY_BUFFER: return bound[1];
- case PIXEL_PACK_BUFFER: return bound[2];
- case PIXEL_UNPACK_BUFFER: return bound[3];
- case UNIFORM_BUFFER: return bound[4];
- default: throw invalid_argument("Buffer::binding");
- }
-}
-
-bool Buffer::set_current(BufferType type, const Buffer *buf)
-{
- const Buffer *&ptr = binding(type);
- if(ptr==buf)
- return false;
-
- ptr = buf;
- return true;
-}
-
-
-vector<const BufferRange *> BufferRange::bound_uniform;
-
-BufferRange::BufferRange(Buffer &b, unsigned o, unsigned s):
- buffer(b),
+Buffer::AsyncTransfer::AsyncTransfer(Buffer &b, size_t o, size_t s):
+ buffer(&b),
offset(o),
- size(s)
+ size(s),
+ dest_addr(0)
{
- if(o>buffer.get_size() || o+s>buffer.get_size())
- throw out_of_range("BufferRange::BufferRange");
+ allocate();
}
-BufferRange::~BufferRange()
+Buffer::AsyncTransfer::AsyncTransfer(AsyncTransfer &&other):
+ buffer(other.buffer),
+ offset(other.offset),
+ size(other.size),
+ dest_addr(other.dest_addr)
{
- for(unsigned i=0; i<bound_uniform.size(); ++i)
- if(bound_uniform[i]==this)
- unbind_from(UNIFORM_BUFFER, i);
+ other.dest_addr = 0;
}
-void BufferRange::data(const void *d)
+Buffer::AsyncTransfer &Buffer::AsyncTransfer::operator=(AsyncTransfer &&other)
{
- buffer.sub_data(offset, size, d);
-}
+ if(dest_addr)
+ finalize();
-void BufferRange::bind_to(BufferType t, unsigned i)
-{
- if(t!=buffer.type)
- Buffer::require_buffer_type(t);
- if(set_current(t, i, this))
- {
- // The buffer gets bound as a side effect
- Buffer::set_current(t, &buffer);
- glBindBufferRange(t, i, buffer.id, offset, size);
- }
-}
-
-void BufferRange::unbind_from(BufferType t, unsigned i)
-{
- if(set_current(t, i, 0))
- {
- Buffer::set_current(t, 0);
- glBindBufferBase(t, i, 0);
- }
-}
+ buffer = other.buffer;
+ offset = other.offset;
+ size = other.size;
+ dest_addr = other.dest_addr;
-const BufferRange *&BufferRange::binding(BufferType type, unsigned index)
-{
- if(type==UNIFORM_BUFFER)
- {
- if(index>=get_n_uniform_buffer_bindings())
- throw out_of_range("BufferRange::binding");
- if(bound_uniform.size()<=index)
- bound_uniform.resize(index+1);
- return bound_uniform[index];
- }
- else
- throw invalid_argument("BufferRange::binding");
-}
+ other.dest_addr = 0;
-bool BufferRange::set_current(BufferType type, unsigned index, const BufferRange *buf)
-{
- const BufferRange *&ptr = binding(type, index);
- if(ptr==buf)
- return false;
-
- ptr = buf;
- return true;
-}
-
-unsigned BufferRange::get_n_uniform_buffer_bindings()
-{
- static unsigned count = get_i(GL_MAX_UNIFORM_BUFFER_BINDINGS);
- return count;
+ return *this;
}
-unsigned BufferRange::get_uniform_buffer_alignment()
+Buffer::AsyncTransfer::~AsyncTransfer()
{
- static unsigned align = get_i(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT);
- return align;
+ if(dest_addr)
+ finalize();
}
} // namespace GL
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