1 #include <msp/gl/extensions/arb_draw_buffers.h>
2 #include <msp/gl/extensions/ext_framebuffer_blit.h>
3 #include <msp/gl/extensions/ext_framebuffer_object.h>
5 #include "framebuffer.h"
7 #include "renderbuffer.h"
15 void operator<<(LexicalConverter &conv, FramebufferStatus status)
19 case FRAMEBUFFER_INCOMPLETE_ATTACHMENT:
20 conv.result("incomplete attachment");
22 case FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:
23 conv.result("missing attachment");
25 case FRAMEBUFFER_INCOMPLETE_DIMENSIONS:
26 conv.result("mismatched attachment dimensions");
28 case FRAMEBUFFER_INCOMPLETE_FORMATS:
29 conv.result("mismatched attachment formats");
31 case FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER:
32 conv.result("missing draw buffer attachment");
34 case FRAMEBUFFER_INCOMPLETE_READ_BUFFER:
35 conv.result("missing read buffer attachment");
37 case FRAMEBUFFER_UNSUPPORTED:
38 conv.result("unsupported");
41 conv.result(lexical_cast<string, unsigned>(status, "%#x"));
46 framebuffer_incomplete::framebuffer_incomplete(FramebufferStatus status):
47 runtime_error(lexical_cast<string>(status))
51 Framebuffer::Framebuffer(unsigned i):
56 throw invalid_argument("System framebuffer must have id 0");
59 glGetIntegerv(GL_VIEWPORT, viewport);
64 Framebuffer::Framebuffer():
69 static Require _req(EXT_framebuffer_object);
71 glGenFramebuffers(1, &id);
74 Framebuffer::~Framebuffer()
77 glDeleteFramebuffers(1, &id);
82 void Framebuffer::update_attachment(unsigned mask) const
86 std::vector<GLenum> color_bufs;
87 color_bufs.reserve(attachments.size());
88 for(unsigned i=0; i<attachments.size(); ++i)
90 const Attachment &attch = attachments[i];
93 if(attch.type==GL_RENDERBUFFER)
94 glFramebufferRenderbuffer(GL_FRAMEBUFFER, attch.attachment, GL_RENDERBUFFER, attch.rbuf->get_id());
95 else if(attch.type==GL_TEXTURE_2D)
97 static_cast<Texture2D *>(attch.tex)->allocate(attch.level);
98 glFramebufferTexture2D(GL_FRAMEBUFFER, attch.attachment, attch.type, attch.tex->get_id(), attch.level);
100 else if(attch.type==GL_TEXTURE_CUBE_MAP)
102 static_cast<TextureCube *>(attch.tex)->allocate(attch.level);
103 glFramebufferTexture2D(GL_FRAMEBUFFER, attch.attachment, attch.cube_face, attch.tex->get_id(), attch.level);
106 glFramebufferRenderbuffer(GL_FRAMEBUFFER, attch.attachment, 0, 0);
109 if(attch.attachment>=COLOR_ATTACHMENT0 && attch.attachment<=COLOR_ATTACHMENT3)
110 color_bufs.push_back(attch.attachment);
113 if(color_bufs.empty())
114 glDrawBuffer(GL_NONE);
115 else if(color_bufs.size()==1)
116 glDrawBuffer(color_bufs.front());
119 static Require _req(ARB_draw_buffers);
120 glDrawBuffers(color_bufs.size(), &color_bufs[0]);
127 void Framebuffer::check_size()
129 for(vector<Attachment>::iterator i=attachments.begin(); i!=attachments.end(); ++i)
132 if(i->type==GL_RENDERBUFFER)
134 width = i->rbuf->get_width();
135 height = i->rbuf->get_height();
137 else if(i->type==GL_TEXTURE_2D)
139 Texture2D *tex = static_cast<Texture2D *>(i->tex);
140 width = tex->get_width();
141 height = tex->get_height();
143 else if(i->type==GL_TEXTURE_CUBE_MAP)
145 width = static_cast<TextureCube *>(i->tex)->get_size();
149 glViewport(0, 0, width, height);
154 unsigned Framebuffer::get_attachment_index(FramebufferAttachment attch)
156 for(unsigned i=0; i<attachments.size(); ++i)
157 if(attachments[i].attachment==attch)
159 attachments.push_back(Attachment(attch));
160 return attachments.size()-1;
163 void Framebuffer::attach(FramebufferAttachment attch, Renderbuffer &rbuf)
166 throw invalid_operation("Framebuffer::attach");
168 unsigned i = get_attachment_index(attch);
169 attachments[i].set(rbuf);
170 update_attachment(1<<i);
174 void Framebuffer::attach(FramebufferAttachment attch, Texture2D &tex, unsigned level)
177 throw invalid_operation("Framebuffer::attach");
179 unsigned i = get_attachment_index(attch);
180 attachments[i].set(tex, 0, level);
181 update_attachment(1<<i);
185 void Framebuffer::attach(FramebufferAttachment attch, TextureCube &tex, TextureCubeFace face, unsigned level)
188 throw invalid_operation("Framebuffer::attach");
190 unsigned i = get_attachment_index(attch);
191 attachments[i].set(tex, face, level);
192 update_attachment(1<<i);
196 void Framebuffer::detach(FramebufferAttachment attch)
199 throw invalid_operation("Framebuffer::detach");
201 unsigned i = get_attachment_index(attch);
202 attachments[i].clear();
203 update_attachment(1<<i);
207 FramebufferStatus Framebuffer::check_status() const
209 Bind _bind(this, true);
210 return static_cast<FramebufferStatus>(glCheckFramebufferStatus(GL_FRAMEBUFFER));
213 void Framebuffer::require_complete() const
215 FramebufferStatus status = check_status();
216 if(status!=FRAMEBUFFER_COMPLETE)
217 throw framebuffer_incomplete(status);
220 void Framebuffer::clear(BufferBits bits)
222 Bind _bind(this, true);
226 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)
228 static Require _req(EXT_framebuffer_blit);
230 const Framebuffer *old = current();
231 if(set_current(this))
233 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, id);
236 update_attachment(dirty);
241 glBindFramebuffer(GL_READ_FRAMEBUFFER, other.id);
243 glBlitFramebuffer(sx0, sy0, sx1, sy1, dx0, dy0, dx1, dy1, bits, (filter ? GL_LINEAR : GL_NEAREST));
246 glBindFramebuffer(GL_FRAMEBUFFER, (old ? old->id : 0));
249 void Framebuffer::blit_from(const Framebuffer &other, int sx, int sy, unsigned wd, unsigned ht, int dx, int dy, BufferBits bits)
251 blit_from(other, sx, sy, sx+wd, sy+ht, dx, dy, dx+wd, dy+ht, bits, false);
254 void Framebuffer::blit_from(const Framebuffer &other, BufferBits bits, bool filter)
256 blit_from(other, 0, 0, other.width, other.height, 0, 0, width, height, bits, filter);
259 void Framebuffer::bind() const
261 if(set_current(this))
263 glBindFramebuffer(GL_FRAMEBUFFER, id);
266 update_attachment(dirty);
270 glViewport(0, 0, width, height);
274 const Framebuffer *Framebuffer::current()
281 void Framebuffer::unbind()
286 Framebuffer &Framebuffer::system()
288 static Framebuffer sys_framebuf(0);
293 Framebuffer::Attachment::Attachment(FramebufferAttachment a):
299 void Framebuffer::Attachment::set(Renderbuffer &r)
301 type = GL_RENDERBUFFER;
306 void Framebuffer::Attachment::set(Texture &t, GLenum f, unsigned l)
308 type = t.get_target();
314 void Framebuffer::Attachment::clear()