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_blit.h>
4 #include <msp/gl/extensions/ext_framebuffer_object.h>
5 #include <msp/gl/extensions/ext_texture_array.h>
6 #include <msp/gl/extensions/ext_texture3d.h>
7 #include <msp/gl/extensions/msp_buffer_control.h>
9 #include "framebuffer.h"
11 #include "renderbuffer.h"
12 #include "texture2d.h"
13 #include "texture3d.h"
20 void operator<<(LexicalConverter &conv, FramebufferStatus status)
24 case FRAMEBUFFER_INCOMPLETE_ATTACHMENT:
25 conv.result("incomplete attachment");
27 case FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:
28 conv.result("missing attachment");
30 case FRAMEBUFFER_INCOMPLETE_DIMENSIONS:
31 conv.result("mismatched attachment dimensions");
33 case FRAMEBUFFER_INCOMPLETE_FORMATS:
34 conv.result("mismatched attachment formats");
36 case FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER:
37 conv.result("missing draw buffer attachment");
39 case FRAMEBUFFER_INCOMPLETE_READ_BUFFER:
40 conv.result("missing read buffer attachment");
42 case FRAMEBUFFER_UNSUPPORTED:
43 conv.result("unsupported");
46 conv.result(lexical_cast<string, unsigned>(status, "%#x"));
51 framebuffer_incomplete::framebuffer_incomplete(FramebufferStatus status):
52 runtime_error(lexical_cast<string>(status))
56 Framebuffer::Framebuffer(unsigned i):
61 throw invalid_argument("System framebuffer must have id 0");
63 glGetIntegerv(GL_VIEWPORT, &view.left);
68 Framebuffer::Framebuffer():
73 static Require _req(EXT_framebuffer_object);
75 if(ARB_direct_state_access)
76 glCreateFramebuffers(1, &id);
78 glGenFramebuffers(1, &id);
81 Framebuffer::~Framebuffer()
84 glDeleteFramebuffers(1, &id);
89 void Framebuffer::update_attachment(unsigned mask) const
91 if(!ARB_direct_state_access && current()!=this)
97 std::vector<GLenum> color_bufs;
98 color_bufs.reserve(attachments.size());
99 for(unsigned i=0; i<attachments.size(); ++i)
101 const Attachment &attch = attachments[i];
104 if(attch.type==GL_RENDERBUFFER)
106 if(ARB_direct_state_access)
107 glNamedFramebufferRenderbuffer(id, attch.attachment, GL_RENDERBUFFER, attch.rbuf->get_id());
109 glFramebufferRenderbuffer(GL_FRAMEBUFFER, attch.attachment, GL_RENDERBUFFER, attch.rbuf->get_id());
111 else if(attch.type==GL_TEXTURE_2D)
113 static_cast<Texture2D *>(attch.tex)->allocate(attch.level);
114 if(ARB_direct_state_access)
115 glNamedFramebufferTexture(id, attch.attachment, attch.tex->get_id(), attch.level);
117 glFramebufferTexture2D(GL_FRAMEBUFFER, attch.attachment, attch.type, attch.tex->get_id(), attch.level);
119 else if(attch.type==GL_TEXTURE_3D || attch.type==GL_TEXTURE_2D_ARRAY)
121 static_cast<Texture3D *>(attch.tex)->allocate(attch.level);
122 if(ARB_direct_state_access)
123 glNamedFramebufferTextureLayer(id, attch.attachment, attch.tex->get_id(), attch.level, attch.layer);
124 else if(attch.type==GL_TEXTURE_2D_ARRAY)
125 glFramebufferTextureLayer(GL_FRAMEBUFFER, attch.attachment, attch.tex->get_id(), attch.level, attch.layer);
127 glFramebufferTexture3D(GL_FRAMEBUFFER, attch.attachment, attch.type, attch.tex->get_id(), attch.level, attch.layer);
129 else if(attch.type==GL_TEXTURE_CUBE_MAP)
131 static_cast<TextureCube *>(attch.tex)->allocate(attch.level);
132 if(ARB_direct_state_access)
133 glNamedFramebufferTextureLayer(id, attch.attachment, attch.tex->get_id(), attch.level, attch.layer);
135 glFramebufferTexture2D(GL_FRAMEBUFFER, attch.attachment, TextureCube::enumerate_faces(attch.layer), attch.tex->get_id(), attch.level);
137 else if(ARB_direct_state_access)
138 glNamedFramebufferRenderbuffer(id, attch.attachment, 0, 0);
140 glFramebufferRenderbuffer(GL_FRAMEBUFFER, attch.attachment, 0, 0);
143 if(attch.attachment>=COLOR_ATTACHMENT0 && attch.attachment<=COLOR_ATTACHMENT3)
144 color_bufs.push_back(attch.attachment);
147 if(color_bufs.size()>1)
148 static Require _req(ARB_draw_buffers);
150 GLenum first_buffer = (color_bufs.empty() ? GL_NONE : color_bufs.front());
151 if(ARB_direct_state_access)
153 /* ARB_direct_state_access ties the availability of these functions to
154 framebuffers themselves, so no further checks are needed. */
155 glNamedFramebufferDrawBuffers(id, color_bufs.size(), &color_bufs[0]);
156 glNamedFramebufferReadBuffer(id, first_buffer);
161 glDrawBuffers(color_bufs.size(), &color_bufs[0]);
162 else if(MSP_buffer_control)
163 glDrawBuffer(first_buffer);
165 if(MSP_buffer_control)
166 glReadBuffer(first_buffer);
170 void Framebuffer::check_size()
172 bool full_viewport = (view.left==0 && view.bottom==0 && view.width==width && view.height==height);
173 for(vector<Attachment>::iterator i=attachments.begin(); i!=attachments.end(); ++i)
176 if(i->type==GL_RENDERBUFFER)
178 width = i->rbuf->get_width();
179 height = i->rbuf->get_height();
181 else if(i->type==GL_TEXTURE_2D)
183 Texture2D *tex = static_cast<Texture2D *>(i->tex);
184 width = max(tex->get_width()>>i->level, 1U);
185 height = max(tex->get_height()>>i->level, 1U);
187 else if(i->type==GL_TEXTURE_3D || i->type==GL_TEXTURE_2D_ARRAY)
189 Texture3D *tex = static_cast<Texture3D *>(i->tex);
190 width = max(tex->get_width()>>i->level, 1U);
191 height = max(tex->get_height()>>i->level, 1U);
193 else if(i->type==GL_TEXTURE_CUBE_MAP)
195 width = max(static_cast<TextureCube *>(i->tex)->get_size()>>i->level, 1U);
204 unsigned Framebuffer::get_attachment_index(FramebufferAttachment attch)
206 for(unsigned i=0; i<attachments.size(); ++i)
207 if(attachments[i].attachment==attch)
209 attachments.push_back(Attachment(attch));
210 return attachments.size()-1;
213 void Framebuffer::attach(FramebufferAttachment attch, Renderbuffer &rbuf)
216 throw invalid_operation("Framebuffer::attach");
218 unsigned i = get_attachment_index(attch);
219 attachments[i].set(rbuf);
220 update_attachment(1<<i);
224 void Framebuffer::attach(FramebufferAttachment attch, Texture2D &tex, unsigned level)
227 throw invalid_operation("Framebuffer::attach");
229 unsigned i = get_attachment_index(attch);
230 attachments[i].set(tex, level, 0);
231 update_attachment(1<<i);
235 void Framebuffer::attach(FramebufferAttachment attch, Texture3D &tex, unsigned layer, unsigned level)
238 throw invalid_operation("Framebuffer::attach");
240 unsigned i = get_attachment_index(attch);
241 attachments[i].set(tex, level, layer);
242 update_attachment(1<<i);
246 void Framebuffer::attach(FramebufferAttachment attch, TextureCube &tex, TextureCubeFace face, unsigned level)
249 throw invalid_operation("Framebuffer::attach");
251 unsigned i = get_attachment_index(attch);
252 attachments[i].set(tex, level, TextureCube::get_face_index(face));
253 update_attachment(1<<i);
257 void Framebuffer::detach(FramebufferAttachment attch)
260 throw invalid_operation("Framebuffer::detach");
262 unsigned i = get_attachment_index(attch);
263 attachments[i].clear();
264 update_attachment(1<<i);
268 FramebufferStatus Framebuffer::check_status() const
270 if(ARB_direct_state_access)
271 return static_cast<FramebufferStatus>(glCheckNamedFramebufferStatus(id, GL_FRAMEBUFFER));
274 BindRestore _bind(this);
275 return static_cast<FramebufferStatus>(glCheckFramebufferStatus(GL_FRAMEBUFFER));
279 void Framebuffer::require_complete() const
281 FramebufferStatus status = check_status();
282 if(status!=FRAMEBUFFER_COMPLETE)
283 throw framebuffer_incomplete(status);
286 void Framebuffer::viewport(int l, int b, unsigned w, unsigned h)
294 glViewport(view.left, view.bottom, view.width, view.height);
297 void Framebuffer::reset_viewport()
299 viewport(0, 0, width, height);
302 void Framebuffer::clear(BufferBits bits)
304 BindRestore _bind(this);
308 void Framebuffer::blit_from(const Framebuffer &other, int sx0, int sy0, int sx1, int sy1, int dx0, int dy0, int dx1, int dy1, BufferBits bits, bool filter)
310 static Require _req(EXT_framebuffer_blit);
312 if(ARB_direct_state_access)
314 glBlitNamedFramebuffer(other.id, id, sx0, sy0, sx1, sy1, dx0, dy0, dx1, dy1, bits, (filter ? GL_LINEAR : GL_NEAREST));
318 const Framebuffer *old = current();
319 if(set_current(this))
321 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, id);
324 update_attachment(dirty);
329 glBindFramebuffer(GL_READ_FRAMEBUFFER, other.id);
331 glBlitFramebuffer(sx0, sy0, sx1, sy1, dx0, dy0, dx1, dy1, bits, (filter ? GL_LINEAR : GL_NEAREST));
334 glBindFramebuffer(GL_FRAMEBUFFER, (old ? old->id : 0));
337 void Framebuffer::blit_from(const Framebuffer &other, int sx, int sy, unsigned wd, unsigned ht, int dx, int dy, BufferBits bits)
339 blit_from(other, sx, sy, sx+wd, sy+ht, dx, dy, dx+wd, dy+ht, bits, false);
342 void Framebuffer::blit_from(const Framebuffer &other, BufferBits bits, bool filter)
344 blit_from(other, 0, 0, other.width, other.height, 0, 0, width, height, bits, filter);
347 void Framebuffer::bind() const
349 if(set_current(this))
351 glBindFramebuffer(GL_FRAMEBUFFER, id);
354 update_attachment(dirty);
359 glViewport(view.left, view.bottom, view.width, view.height);
363 const Framebuffer *Framebuffer::current()
370 void Framebuffer::unbind()
375 Framebuffer &Framebuffer::system()
377 static Framebuffer sys_framebuf(0);
382 Framebuffer::Attachment::Attachment(FramebufferAttachment a):
389 void Framebuffer::Attachment::set(Renderbuffer &r)
391 type = GL_RENDERBUFFER;
397 void Framebuffer::Attachment::set(Texture &t, unsigned l, unsigned z)
399 type = t.get_target();
405 void Framebuffer::Attachment::clear()
411 Framebuffer::Viewport::Viewport():