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):
24 require_buffer_type(type);
26 if(ARB_direct_state_access)
27 glCreateBuffers(1, &id);
34 for(unsigned i=0; i<5; ++i)
36 unbind_from(buffer_types[i]);
37 glDeleteBuffers(1, &id);
40 void Buffer::require_buffer_type(BufferType type)
42 static Require _req_vbo(ARB_vertex_buffer_object);
43 if(type==PIXEL_PACK_BUFFER || type==PIXEL_UNPACK_BUFFER)
44 static Require _req_pbo(ARB_pixel_buffer_object);
45 else if(type==UNIFORM_BUFFER)
46 static Require _req_ubo(ARB_uniform_buffer_object);
49 void Buffer::storage(unsigned sz)
52 throw invalid_operation("Buffer::storage");
54 throw invalid_argument("Buffer::storage");
57 if(ARB_buffer_storage)
59 static const int flags = GL_MAP_READ_BIT|GL_MAP_WRITE_BIT|GL_DYNAMIC_STORAGE_BIT;
60 if(ARB_direct_state_access)
61 glNamedBufferStorage(id, size, 0, flags);
64 BindRestore _bind(this, type);
65 glBufferStorage(type, size, 0, flags);
70 void Buffer::set_usage(BufferUsage u)
72 // TODO OpenGL ES 2.0 doesn't support read or copy usages
76 void Buffer::data(const void *d)
79 throw invalid_operation("Buffer::data");
81 if(ARB_buffer_storage)
82 return sub_data(0, size, d);
84 if(ARB_direct_state_access)
85 glNamedBufferData(id, size, d, usage);
88 BindRestore _bind(this, type);
89 glBufferData(type, size, d, usage);
93 void Buffer::data(unsigned sz, const void *d)
98 throw incompatible_data("Buffer::data");
103 void Buffer::sub_data(unsigned off, unsigned sz, const void *d)
105 if(ARB_direct_state_access)
106 glNamedBufferSubData(id, off, sz, d);
109 BindRestore _bind(this, type);
110 glBufferSubData(type, off, sz, d);
114 void Buffer::require_size(unsigned req_sz) const
117 throw buffer_too_small(format("buffer has %d bytes; %d required", size, req_sz));
120 BufferRange *Buffer::create_range(unsigned s, unsigned o)
122 return new BufferRange(*this, s, o);
127 if(ARB_map_buffer_range)
129 if(ARB_direct_state_access)
130 return glMapNamedBufferRange(id, 0, size, GL_MAP_READ_BIT|GL_MAP_WRITE_BIT);
133 BindRestore _bind(this, type);
134 return glMapBufferRange(type, 0, size, GL_MAP_READ_BIT|GL_MAP_WRITE_BIT);
137 else if(ARB_direct_state_access)
138 return glMapNamedBuffer(id, GL_READ_WRITE);
139 else if(OES_mapbuffer)
141 BindRestore _bind(this, type);
142 return glMapBuffer(type, GL_READ_WRITE);
145 throw invalid_operation("Buffer::map");
150 // TODO check if it's mapped
151 if(ARB_direct_state_access)
152 return glUnmapNamedBuffer(id);
153 else if(OES_mapbuffer)
155 BindRestore _bind(this, type);
156 return glUnmapBuffer(type);
162 void Buffer::bind_to(BufferType t) const
165 require_buffer_type(t);
166 if(t==ELEMENT_ARRAY_BUFFER)
167 if(const VertexSetup *vs = VertexSetup::current())
169 // Don't change the binding in a vertex array object
170 if(this==vs->get_index_buffer())
172 throw invalid_operation("Buffer::bind_to(ELEMENT_ARRAY_BUFFER)");
174 if(set_current(t, this))
178 const Buffer *Buffer::current(BufferType t)
180 if(t==ELEMENT_ARRAY_BUFFER)
181 if(const VertexSetup *vs = VertexSetup::current())
182 return vs->get_index_buffer();
186 void Buffer::unbind_from(BufferType type)
188 if(type==ELEMENT_ARRAY_BUFFER && VertexSetup::current())
189 throw invalid_operation("Buffer::unbind_from(ELEMENT_ARRAY_BUFFER)");
190 if(set_current(type, 0))
191 glBindBuffer(type, 0);
194 const Buffer *&Buffer::binding(BufferType type)
198 case ARRAY_BUFFER: return bound[0];
199 case ELEMENT_ARRAY_BUFFER: return bound[1];
200 case PIXEL_PACK_BUFFER: return bound[2];
201 case PIXEL_UNPACK_BUFFER: return bound[3];
202 case UNIFORM_BUFFER: return bound[4];
203 default: throw invalid_argument("Buffer::binding");
207 bool Buffer::set_current(BufferType type, const Buffer *buf)
209 const Buffer *&ptr = binding(type);
218 vector<const BufferRange *> BufferRange::bound_uniform;
220 BufferRange::BufferRange(Buffer &b, unsigned o, unsigned s):
225 if(o>buffer.get_size() || o+s>buffer.get_size())
226 throw out_of_range("BufferRange::BufferRange");
229 BufferRange::~BufferRange()
231 for(unsigned i=0; i<bound_uniform.size(); ++i)
232 if(bound_uniform[i]==this)
233 unbind_from(UNIFORM_BUFFER, i);
236 void BufferRange::data(const void *d)
238 buffer.sub_data(offset, size, d);
241 void BufferRange::bind_to(BufferType t, unsigned i)
244 Buffer::require_buffer_type(t);
245 if(set_current(t, i, this))
247 // The buffer gets bound as a side effect
248 Buffer::set_current(t, &buffer);
249 glBindBufferRange(t, i, buffer.id, offset, size);
253 void BufferRange::unbind_from(BufferType t, unsigned i)
255 if(set_current(t, i, 0))
257 Buffer::set_current(t, 0);
258 glBindBufferBase(t, i, 0);
262 const BufferRange *&BufferRange::binding(BufferType type, unsigned index)
264 if(type==UNIFORM_BUFFER)
266 if(index>=get_n_uniform_buffer_bindings())
267 throw out_of_range("BufferRange::binding");
268 if(bound_uniform.size()<=index)
269 bound_uniform.resize(index+1);
270 return bound_uniform[index];
273 throw invalid_argument("BufferRange::binding");
276 bool BufferRange::set_current(BufferType type, unsigned index, const BufferRange *buf)
278 const BufferRange *&ptr = binding(type, index);
286 unsigned BufferRange::get_n_uniform_buffer_bindings()
288 static unsigned count = get_i(GL_MAX_UNIFORM_BUFFER_BINDINGS);
292 unsigned BufferRange::get_uniform_buffer_alignment()
294 static unsigned align = get_i(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT);