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/strings/format.h>
9 #include "vertexsetup.h"
16 const Buffer *Buffer::bound[5] = { 0, 0, 0, 0, 0 };
17 BufferType buffer_types[] = { ARRAY_BUFFER, ELEMENT_ARRAY_BUFFER, PIXEL_PACK_BUFFER, PIXEL_UNPACK_BUFFER, UNIFORM_BUFFER };
19 Buffer::Buffer(BufferType t):
23 require_buffer_type(type);
25 if(ARB_direct_state_access)
26 glCreateBuffers(1, &id);
33 for(unsigned i=0; i<5; ++i)
35 unbind_from(buffer_types[i]);
36 glDeleteBuffers(1, &id);
39 void Buffer::require_buffer_type(BufferType type)
41 static Require _req_vbo(ARB_vertex_buffer_object);
42 if(type==PIXEL_PACK_BUFFER || type==PIXEL_UNPACK_BUFFER)
43 static Require _req_pbo(ARB_pixel_buffer_object);
44 else if(type==UNIFORM_BUFFER)
45 static Require _req_ubo(ARB_uniform_buffer_object);
48 void Buffer::storage(unsigned sz)
51 throw invalid_operation("Buffer::storage");
53 throw invalid_argument("Buffer::storage");
56 if(ARB_buffer_storage)
58 static const int flags = GL_MAP_READ_BIT|GL_MAP_WRITE_BIT|GL_DYNAMIC_STORAGE_BIT;
59 if(ARB_direct_state_access)
60 glNamedBufferStorage(id, size, 0, flags);
63 BindRestore _bind(this, type);
64 glBufferStorage(type, size, 0, flags);
69 void Buffer::set_usage(BufferUsage)
73 void Buffer::data(const void *d)
76 throw invalid_operation("Buffer::data");
78 if(ARB_buffer_storage)
79 return sub_data(0, size, d);
81 if(ARB_direct_state_access)
82 glNamedBufferData(id, size, d, STATIC_DRAW);
85 BindRestore _bind(this, type);
86 glBufferData(type, size, d, STATIC_DRAW);
90 void Buffer::data(unsigned sz, const void *d)
95 throw incompatible_data("Buffer::data");
100 void Buffer::sub_data(unsigned off, unsigned sz, const void *d)
102 if(ARB_direct_state_access)
103 glNamedBufferSubData(id, off, sz, d);
106 BindRestore _bind(this, type);
107 glBufferSubData(type, off, sz, d);
111 void Buffer::require_size(unsigned req_sz) const
114 throw buffer_too_small(format("buffer has %d bytes; %d required", size, req_sz));
117 BufferRange *Buffer::create_range(unsigned s, unsigned o)
119 return new BufferRange(*this, s, o);
124 if(ARB_map_buffer_range)
126 if(ARB_direct_state_access)
127 return glMapNamedBufferRange(id, 0, size, GL_MAP_READ_BIT|GL_MAP_WRITE_BIT);
130 BindRestore _bind(this, type);
131 return glMapBufferRange(type, 0, size, GL_MAP_READ_BIT|GL_MAP_WRITE_BIT);
134 else if(ARB_direct_state_access)
135 return glMapNamedBuffer(id, GL_READ_WRITE);
136 else if(OES_mapbuffer)
138 BindRestore _bind(this, type);
139 return glMapBuffer(type, GL_READ_WRITE);
142 throw invalid_operation("Buffer::map");
147 // TODO check if it's mapped
148 if(ARB_direct_state_access)
149 return glUnmapNamedBuffer(id);
150 else if(OES_mapbuffer)
152 BindRestore _bind(this, type);
153 return glUnmapBuffer(type);
159 void Buffer::bind_to(BufferType t) const
162 require_buffer_type(t);
163 if(t==ELEMENT_ARRAY_BUFFER)
164 if(const VertexSetup *vs = VertexSetup::current())
166 // Don't change the binding in a vertex array object
167 if(this==vs->get_index_buffer())
169 throw invalid_operation("Buffer::bind_to(ELEMENT_ARRAY_BUFFER)");
171 if(set_current(t, this))
175 const Buffer *Buffer::current(BufferType t)
177 if(t==ELEMENT_ARRAY_BUFFER)
178 if(const VertexSetup *vs = VertexSetup::current())
179 return vs->get_index_buffer();
183 void Buffer::unbind_from(BufferType type)
185 if(type==ELEMENT_ARRAY_BUFFER && VertexSetup::current())
186 throw invalid_operation("Buffer::unbind_from(ELEMENT_ARRAY_BUFFER)");
187 if(set_current(type, 0))
188 glBindBuffer(type, 0);
191 const Buffer *&Buffer::binding(BufferType type)
195 case ARRAY_BUFFER: return bound[0];
196 case ELEMENT_ARRAY_BUFFER: return bound[1];
197 case PIXEL_PACK_BUFFER: return bound[2];
198 case PIXEL_UNPACK_BUFFER: return bound[3];
199 case UNIFORM_BUFFER: return bound[4];
200 default: throw invalid_argument("Buffer::binding");
204 bool Buffer::set_current(BufferType type, const Buffer *buf)
206 const Buffer *&ptr = binding(type);
215 vector<const BufferRange *> BufferRange::bound_uniform;
217 BufferRange::BufferRange(Buffer &b, unsigned o, unsigned s):
222 if(o>buffer.get_size() || o+s>buffer.get_size())
223 throw out_of_range("BufferRange::BufferRange");
226 BufferRange::~BufferRange()
228 for(unsigned i=0; i<bound_uniform.size(); ++i)
229 if(bound_uniform[i]==this)
230 unbind_from(UNIFORM_BUFFER, i);
233 void BufferRange::data(const void *d)
235 buffer.sub_data(offset, size, d);
238 void BufferRange::bind_to(BufferType t, unsigned i)
241 Buffer::require_buffer_type(t);
242 if(set_current(t, i, this))
244 // The buffer gets bound as a side effect
245 Buffer::set_current(t, &buffer);
246 glBindBufferRange(t, i, buffer.id, offset, size);
250 void BufferRange::unbind_from(BufferType t, unsigned i)
252 if(set_current(t, i, 0))
254 Buffer::set_current(t, 0);
255 glBindBufferBase(t, i, 0);
259 const BufferRange *&BufferRange::binding(BufferType type, unsigned index)
261 if(type==UNIFORM_BUFFER)
263 if(index>=get_n_uniform_buffer_bindings())
264 throw out_of_range("BufferRange::binding");
265 if(bound_uniform.size()<=index)
266 bound_uniform.resize(index+1);
267 return bound_uniform[index];
270 throw invalid_argument("BufferRange::binding");
273 bool BufferRange::set_current(BufferType type, unsigned index, const BufferRange *buf)
275 const BufferRange *&ptr = binding(type, index);
283 unsigned BufferRange::get_n_uniform_buffer_bindings()
285 static unsigned count = get_i(GL_MAX_UNIFORM_BUFFER_BINDINGS);
289 unsigned BufferRange::get_uniform_buffer_alignment()
291 static unsigned align = get_i(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT);