2 #include <msp/gl/extensions/arb_buffer_storage.h>
3 #include <msp/gl/extensions/arb_direct_state_access.h>
4 #include <msp/gl/extensions/arb_map_buffer_range.h>
5 #include <msp/gl/extensions/khr_debug.h>
6 #include <msp/strings/format.h>
8 #include "deviceinfo.h"
11 #include "vertexsetup.h"
18 const Buffer *Buffer::bound[5] = { 0, 0, 0, 0, 0 };
19 BufferType buffer_types[] = { ARRAY_BUFFER, ELEMENT_ARRAY_BUFFER, PIXEL_PACK_BUFFER, PIXEL_UNPACK_BUFFER, UNIFORM_BUFFER };
25 static Require _req(ARB_vertex_buffer_object);
27 if(ARB_direct_state_access)
28 glCreateBuffers(1, &id);
35 for(unsigned i=0; i<5; ++i)
37 unbind_from(buffer_types[i]);
38 glDeleteBuffers(1, &id);
41 void Buffer::require_buffer_type(BufferType type)
43 static Require _req_vbo(ARB_vertex_buffer_object);
44 if(type==PIXEL_PACK_BUFFER || type==PIXEL_UNPACK_BUFFER)
45 static Require _req_pbo(ARB_pixel_buffer_object);
46 else if(type==UNIFORM_BUFFER)
47 static Require _req_ubo(ARB_uniform_buffer_object);
50 void Buffer::storage(unsigned sz)
55 throw incompatible_data("Buffer::storage");
59 throw invalid_argument("Buffer::storage");
64 void Buffer::allocate()
67 throw invalid_operation("Buffer::allocate");
71 if(ARB_buffer_storage)
73 static const int flags = GL_MAP_READ_BIT|GL_MAP_WRITE_BIT|GL_DYNAMIC_STORAGE_BIT;
74 if(ARB_direct_state_access)
75 glNamedBufferStorage(id, size, 0, flags);
78 BindRestore _bind(this, ARRAY_BUFFER);
79 glBufferStorage(ARRAY_BUFFER, size, 0, flags);
88 void Buffer::set_usage(BufferUsage)
92 void Buffer::data(const void *d)
95 throw invalid_operation("Buffer::data");
97 if(ARB_buffer_storage)
98 return sub_data(0, size, d);
100 if(ARB_direct_state_access)
101 glNamedBufferData(id, size, d, STATIC_DRAW);
104 BindRestore _bind(this, ARRAY_BUFFER);
105 glBufferData(ARRAY_BUFFER, size, d, STATIC_DRAW);
111 void Buffer::data(unsigned sz, const void *d)
116 throw incompatible_data("Buffer::data");
121 void Buffer::sub_data(unsigned off, unsigned sz, const void *d)
124 throw invalid_operation("Buffer::sub_data");
128 if(ARB_direct_state_access)
129 glNamedBufferSubData(id, off, sz, d);
132 BindRestore _bind(this, ARRAY_BUFFER);
133 glBufferSubData(ARRAY_BUFFER, off, sz, d);
137 void Buffer::require_size(unsigned req_sz) const
140 throw buffer_too_small(format("buffer has %d bytes; %d required", size, req_sz));
143 BufferRange *Buffer::create_range(unsigned s, unsigned o)
145 return new BufferRange(*this, s, o);
150 static Require _req(ARB_map_buffer_range);
153 if(ARB_direct_state_access)
154 return glMapNamedBufferRange(id, 0, size, GL_MAP_READ_BIT|GL_MAP_WRITE_BIT);
157 BindRestore _bind(this, ARRAY_BUFFER);
158 return glMapBufferRange(ARRAY_BUFFER, 0, size, GL_MAP_READ_BIT|GL_MAP_WRITE_BIT);
164 // TODO check if it's mapped
165 if(ARB_direct_state_access)
166 return glUnmapNamedBuffer(id);
167 else if(OES_mapbuffer)
169 BindRestore _bind(this, ARRAY_BUFFER);
170 return glUnmapBuffer(ARRAY_BUFFER);
176 void Buffer::bind_to(BufferType t) const
178 require_buffer_type(t);
179 if(t==ELEMENT_ARRAY_BUFFER)
180 if(const VertexSetup *vs = VertexSetup::current())
182 // Don't change the binding in a vertex array object
183 if(this==vs->get_index_buffer())
185 throw invalid_operation("Buffer::bind_to(ELEMENT_ARRAY_BUFFER)");
187 if(set_current(t, this))
191 const Buffer *Buffer::current(BufferType t)
193 if(t==ELEMENT_ARRAY_BUFFER)
194 if(const VertexSetup *vs = VertexSetup::current())
195 return vs->get_index_buffer();
199 void Buffer::unbind_from(BufferType type)
201 if(type==ELEMENT_ARRAY_BUFFER && VertexSetup::current())
202 throw invalid_operation("Buffer::unbind_from(ELEMENT_ARRAY_BUFFER)");
203 if(set_current(type, 0))
204 glBindBuffer(type, 0);
207 const Buffer *&Buffer::binding(BufferType type)
211 case ARRAY_BUFFER: return bound[0];
212 case ELEMENT_ARRAY_BUFFER: return bound[1];
213 case PIXEL_PACK_BUFFER: return bound[2];
214 case PIXEL_UNPACK_BUFFER: return bound[3];
215 case UNIFORM_BUFFER: return bound[4];
216 default: throw invalid_argument("Buffer::binding");
220 bool Buffer::set_current(BufferType type, const Buffer *buf)
222 const Buffer *&ptr = binding(type);
230 void Buffer::set_debug_name(const string &name)
234 glObjectLabel(GL_BUFFER, id, name.size(), name.c_str());
241 vector<const BufferRange *> BufferRange::bound_uniform;
243 BufferRange::BufferRange(Buffer &b, unsigned o, unsigned s):
248 if(o>buffer.get_size() || o+s>buffer.get_size())
249 throw out_of_range("BufferRange::BufferRange");
252 BufferRange::~BufferRange()
254 for(unsigned i=0; i<bound_uniform.size(); ++i)
255 if(bound_uniform[i]==this)
256 unbind_from(UNIFORM_BUFFER, i);
259 void BufferRange::data(const void *d)
261 buffer.sub_data(offset, size, d);
264 void BufferRange::bind_to(BufferType t, unsigned i)
266 Buffer::require_buffer_type(t);
267 if(set_current(t, i, this))
269 // The buffer gets bound as a side effect
270 Buffer::set_current(t, &buffer);
271 glBindBufferRange(t, i, buffer.id, offset, size);
275 void BufferRange::unbind_from(BufferType t, unsigned i)
277 if(set_current(t, i, 0))
279 Buffer::set_current(t, 0);
280 glBindBufferBase(t, i, 0);
284 const BufferRange *&BufferRange::binding(BufferType type, unsigned index)
286 if(type==UNIFORM_BUFFER)
288 if(index>=Limits::get_global().max_uniform_bindings)
289 throw out_of_range("BufferRange::binding");
290 if(bound_uniform.size()<=index)
291 bound_uniform.resize(index+1);
292 return bound_uniform[index];
295 throw invalid_argument("BufferRange::binding");
298 bool BufferRange::set_current(BufferType type, unsigned index, const BufferRange *buf)
300 const BufferRange *&ptr = binding(type, index);
308 unsigned BufferRange::get_n_uniform_buffer_bindings()
310 return Limits::get_global().max_uniform_bindings;
313 unsigned BufferRange::get_uniform_buffer_alignment()
315 return Limits::get_global().uniform_buffer_alignment;