1 #include <msp/gl/extensions/arb_draw_buffers.h>
2 #include <msp/gl/extensions/arb_direct_state_access.h>
3 #include <msp/gl/extensions/ext_framebuffer_object.h>
4 #include <msp/gl/extensions/ext_texture_array.h>
5 #include <msp/gl/extensions/ext_texture3d.h>
6 #include <msp/gl/extensions/msp_buffer_control.h>
7 #include <msp/gl/extensions/khr_debug.h>
9 #include "framebuffer.h"
11 #include "renderbuffer.h"
12 #include "texture2d.h"
13 #include "texture3d.h"
14 #include "windowview.h"
21 void operator<<(LexicalConverter &conv, FramebufferStatus status)
25 case FRAMEBUFFER_INCOMPLETE_ATTACHMENT:
26 conv.result("incomplete attachment");
28 case FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:
29 conv.result("missing attachment");
31 case FRAMEBUFFER_INCOMPLETE_DIMENSIONS:
32 conv.result("mismatched attachment dimensions");
34 case FRAMEBUFFER_INCOMPLETE_FORMATS:
35 conv.result("mismatched attachment formats");
37 case FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER:
38 conv.result("missing draw buffer attachment");
40 case FRAMEBUFFER_INCOMPLETE_READ_BUFFER:
41 conv.result("missing read buffer attachment");
43 case FRAMEBUFFER_INCOMPLETE_MULTISAMPLE:
44 conv.result("mismatched attachment sample counts");
46 case FRAMEBUFFER_INCOMPLETE_LAYER_COUNT:
47 conv.result("mismatched attachment layer counts");
49 case FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS:
50 conv.result("mismatched attachment layering");
52 case FRAMEBUFFER_UNSUPPORTED:
53 conv.result("unsupported");
56 conv.result(lexical_cast<string, unsigned>(status, "%#x"));
61 framebuffer_incomplete::framebuffer_incomplete(FramebufferStatus status):
62 runtime_error(lexical_cast<string>(status))
66 Framebuffer::Framebuffer(unsigned i):
68 status(FRAMEBUFFER_COMPLETE),
72 throw invalid_argument("System framebuffer must have id 0");
75 glGetIntegerv(GL_VIEWPORT, view);
80 Framebuffer::Framebuffer():
83 status(FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT),
86 static Require _req(EXT_framebuffer_object);
88 if(ARB_direct_state_access)
89 glCreateFramebuffers(1, &id);
91 glGenFramebuffers(1, &id);
94 Framebuffer::~Framebuffer()
97 glDeleteFramebuffers(1, &id);
100 void Framebuffer::update() const
102 vector<GLenum> color_bufs;
103 color_bufs.reserve(attachments.size());
104 for(unsigned i=0; i<attachments.size(); ++i)
106 const Attachment &attch = attachments[i];
109 if(attch.type==GL_RENDERBUFFER)
111 if(ARB_direct_state_access)
112 glNamedFramebufferRenderbuffer(id, attch.attachment, GL_RENDERBUFFER, attch.rbuf->get_id());
114 glFramebufferRenderbuffer(GL_FRAMEBUFFER, attch.attachment, GL_RENDERBUFFER, attch.rbuf->get_id());
118 if(ARB_direct_state_access)
120 if(attch.type==GL_TEXTURE_2D || attch.layer<0)
121 glNamedFramebufferTexture(id, attch.attachment, attch.tex->get_id(), attch.level);
123 glNamedFramebufferTextureLayer(id, attch.attachment, attch.tex->get_id(), attch.level, attch.layer);
125 else if(attch.type==GL_TEXTURE_2D)
126 glFramebufferTexture2D(GL_FRAMEBUFFER, attch.attachment, attch.type, attch.tex->get_id(), attch.level);
127 else if(attch.layer<0)
128 glFramebufferTexture(GL_FRAMEBUFFER, attch.attachment, attch.tex->get_id(), attch.level);
129 else if(attch.type==GL_TEXTURE_2D_ARRAY)
130 glFramebufferTextureLayer(GL_FRAMEBUFFER, attch.attachment, attch.tex->get_id(), attch.level, attch.layer);
131 else if(attch.type==GL_TEXTURE_3D)
132 glFramebufferTexture3D(GL_FRAMEBUFFER, attch.attachment, attch.type, attch.tex->get_id(), attch.level, attch.layer);
133 else if(attch.type==GL_TEXTURE_CUBE_MAP)
134 glFramebufferTexture2D(GL_FRAMEBUFFER, attch.attachment, TextureCube::enumerate_faces(attch.layer), attch.tex->get_id(), attch.level);
136 else if(ARB_direct_state_access)
137 glNamedFramebufferRenderbuffer(id, attch.attachment, 0, 0);
139 glFramebufferRenderbuffer(GL_FRAMEBUFFER, attch.attachment, 0, 0);
142 if(attch.attachment>=COLOR_ATTACHMENT0 && attch.attachment<=COLOR_ATTACHMENT3)
143 color_bufs.push_back(attch.attachment);
146 if(color_bufs.size()>1)
147 static Require _req(ARB_draw_buffers);
149 GLenum first_buffer = (color_bufs.empty() ? GL_NONE : color_bufs.front());
150 if(ARB_direct_state_access)
152 /* ARB_direct_state_access ties the availability of these functions to
153 framebuffers themselves, so no further checks are needed. */
154 glNamedFramebufferDrawBuffers(id, color_bufs.size(), &color_bufs[0]);
155 glNamedFramebufferReadBuffer(id, first_buffer);
160 glDrawBuffers(color_bufs.size(), &color_bufs[0]);
161 else if(MSP_buffer_control)
162 glDrawBuffer(first_buffer);
164 if(MSP_buffer_control)
165 glReadBuffer(first_buffer);
168 if(ARB_direct_state_access)
169 status = static_cast<FramebufferStatus>(glCheckNamedFramebufferStatus(id, GL_FRAMEBUFFER));
171 status = static_cast<FramebufferStatus>(glCheckFramebufferStatus(GL_FRAMEBUFFER));
176 void Framebuffer::check_size()
178 for(vector<Attachment>::iterator i=attachments.begin(); i!=attachments.end(); ++i)
181 if(i->type==GL_RENDERBUFFER)
183 width = i->rbuf->get_width();
184 height = i->rbuf->get_height();
186 else if(i->type==GL_TEXTURE_2D)
188 Texture2D *tex = static_cast<Texture2D *>(i->tex);
189 width = max(tex->get_width()>>i->level, 1U);
190 height = max(tex->get_height()>>i->level, 1U);
192 else if(i->type==GL_TEXTURE_3D || i->type==GL_TEXTURE_2D_ARRAY)
194 Texture3D *tex = static_cast<Texture3D *>(i->tex);
195 width = max(tex->get_width()>>i->level, 1U);
196 height = max(tex->get_height()>>i->level, 1U);
198 else if(i->type==GL_TEXTURE_CUBE_MAP)
200 width = max(static_cast<TextureCube *>(i->tex)->get_size()>>i->level, 1U);
207 unsigned Framebuffer::get_attachment_index(FramebufferAttachment attch)
209 for(unsigned i=0; i<attachments.size(); ++i)
210 if(attachments[i].attachment==attch)
212 attachments.push_back(Attachment(attch));
213 return attachments.size()-1;
216 void Framebuffer::set_texture_attachment(FramebufferAttachment attch, Texture &tex, unsigned level, int layer)
219 throw invalid_operation("Framebuffer::attach");
221 unsigned i = get_attachment_index(attch);
222 attachments[i].set(tex, level, layer);
227 void Framebuffer::attach(FramebufferAttachment attch, Renderbuffer &rbuf)
230 throw invalid_operation("Framebuffer::attach");
232 unsigned i = get_attachment_index(attch);
233 attachments[i].set(rbuf);
238 void Framebuffer::attach(FramebufferAttachment attch, Texture2D &tex, unsigned level)
241 set_texture_attachment(attch, tex, level, 0);
244 void Framebuffer::attach(FramebufferAttachment attch, Texture3D &tex, unsigned layer, unsigned level)
247 set_texture_attachment(attch, tex, level, layer);
250 void Framebuffer::attach(FramebufferAttachment attch, TextureCube &tex, TextureCubeFace face, unsigned level)
253 set_texture_attachment(attch, tex, level, TextureCube::get_face_index(face));
256 void Framebuffer::attach_layered(FramebufferAttachment attch, Texture3D &tex, unsigned level)
258 static Require _req(ARB_geometry_shader4);
260 set_texture_attachment(attch, tex, level, -1);
263 void Framebuffer::attach_layered(FramebufferAttachment attch, TextureCube &tex, unsigned level)
265 static Require _req(ARB_geometry_shader4);
267 set_texture_attachment(attch, tex, level, -1);
270 void Framebuffer::detach(FramebufferAttachment attch)
273 throw invalid_operation("Framebuffer::detach");
275 unsigned i = get_attachment_index(attch);
276 attachments[i].clear();
281 void Framebuffer::resize(const WindowView &view)
284 throw invalid_operation("Framebuffer::resize");
286 width = view.get_width();
287 height = view.get_height();
290 void Framebuffer::require_complete() const
292 if(status!=FRAMEBUFFER_COMPLETE)
293 throw framebuffer_incomplete(status);
296 void Framebuffer::set_debug_name(const string &name)
300 glObjectLabel(GL_FRAMEBUFFER, id, name.size(), name.c_str());
306 Framebuffer &Framebuffer::system()
308 static Framebuffer sys_framebuf(0);
313 Framebuffer::Attachment::Attachment(FramebufferAttachment a):
320 void Framebuffer::Attachment::set(Renderbuffer &r)
322 type = GL_RENDERBUFFER;
328 void Framebuffer::Attachment::set(Texture &t, unsigned l, int z)
330 type = t.get_target();
336 void Framebuffer::Attachment::clear()