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 "texture2d.h"
12 #include "texture2dmultisample.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];
111 GLenum type = attch.tex->get_target();
112 if(ARB_direct_state_access)
114 if(type==GL_TEXTURE_2D || type==GL_TEXTURE_2D_MULTISAMPLE || attch.layer<0)
115 glNamedFramebufferTexture(id, attch.attachment, attch.tex->get_id(), attch.level);
117 glNamedFramebufferTextureLayer(id, attch.attachment, attch.tex->get_id(), attch.level, attch.layer);
119 else if(type==GL_TEXTURE_2D || type==GL_TEXTURE_2D_MULTISAMPLE)
120 glFramebufferTexture2D(GL_FRAMEBUFFER, attch.attachment, type, attch.tex->get_id(), attch.level);
121 else if(attch.layer<0)
122 glFramebufferTexture(GL_FRAMEBUFFER, attch.attachment, attch.tex->get_id(), attch.level);
123 else if(type==GL_TEXTURE_2D_ARRAY)
124 glFramebufferTextureLayer(GL_FRAMEBUFFER, attch.attachment, attch.tex->get_id(), attch.level, attch.layer);
125 else if(type==GL_TEXTURE_3D)
126 glFramebufferTexture3D(GL_FRAMEBUFFER, attch.attachment, type, attch.tex->get_id(), attch.level, attch.layer);
127 else if(type==GL_TEXTURE_CUBE_MAP)
128 glFramebufferTexture2D(GL_FRAMEBUFFER, attch.attachment, TextureCube::enumerate_faces(attch.layer), attch.tex->get_id(), attch.level);
130 else if(ARB_direct_state_access)
131 glNamedFramebufferTexture(id, attch.attachment, 0, 0);
133 glFramebufferTexture2D(GL_FRAMEBUFFER, attch.attachment, GL_TEXTURE_2D, 0, 0);
136 if(attch.attachment>=COLOR_ATTACHMENT0 && attch.attachment<=COLOR_ATTACHMENT3)
137 color_bufs.push_back(attch.attachment);
140 if(color_bufs.size()>1)
141 static Require _req(ARB_draw_buffers);
143 GLenum first_buffer = (color_bufs.empty() ? GL_NONE : color_bufs.front());
144 if(ARB_direct_state_access)
146 /* ARB_direct_state_access ties the availability of these functions to
147 framebuffers themselves, so no further checks are needed. */
148 glNamedFramebufferDrawBuffers(id, color_bufs.size(), &color_bufs[0]);
149 glNamedFramebufferReadBuffer(id, first_buffer);
154 glDrawBuffers(color_bufs.size(), &color_bufs[0]);
155 else if(MSP_buffer_control)
156 glDrawBuffer(first_buffer);
158 if(MSP_buffer_control)
159 glReadBuffer(first_buffer);
162 if(ARB_direct_state_access)
163 status = static_cast<FramebufferStatus>(glCheckNamedFramebufferStatus(id, GL_FRAMEBUFFER));
165 status = static_cast<FramebufferStatus>(glCheckFramebufferStatus(GL_FRAMEBUFFER));
170 void Framebuffer::check_size()
172 for(vector<Attachment>::iterator i=attachments.begin(); i!=attachments.end(); ++i)
175 GLenum type = i->tex->get_target();
176 if(type==GL_TEXTURE_2D)
178 Texture2D *tex = static_cast<Texture2D *>(i->tex);
179 width = max(tex->get_width()>>i->level, 1U);
180 height = max(tex->get_height()>>i->level, 1U);
182 else if(type==GL_TEXTURE_2D_MULTISAMPLE)
184 Texture2DMultisample *tex = static_cast<Texture2DMultisample *>(i->tex);
185 width = tex->get_width();
186 height = tex->get_height();
188 else if(type==GL_TEXTURE_3D || type==GL_TEXTURE_2D_ARRAY)
190 Texture3D *tex = static_cast<Texture3D *>(i->tex);
191 width = max(tex->get_width()>>i->level, 1U);
192 height = max(tex->get_height()>>i->level, 1U);
194 else if(type==GL_TEXTURE_CUBE_MAP)
196 width = max(static_cast<TextureCube *>(i->tex)->get_size()>>i->level, 1U);
203 unsigned Framebuffer::get_attachment_index(FramebufferAttachment attch)
205 for(unsigned i=0; i<attachments.size(); ++i)
206 if(attachments[i].attachment==attch)
208 attachments.push_back(Attachment(attch));
209 return attachments.size()-1;
212 void Framebuffer::set_attachment(FrameAttachment attch, Texture &tex, unsigned level, int layer)
215 throw invalid_operation("Framebuffer::attach");
217 unsigned i = get_attachment_index(attch);
218 attachments[i].set(tex, level, layer);
223 void Framebuffer::attach(FramebufferAttachment attch, Texture2D &tex, unsigned level)
226 set_attachment(attch, tex, level, 0);
229 void Framebuffer::attach(FramebufferAttachment attch, Texture2DMultisample &tex)
231 set_attachment(attch, tex, 0, 0);
234 void Framebuffer::attach(FramebufferAttachment attch, Texture3D &tex, unsigned layer, unsigned level)
237 set_attachment(attch, tex, level, layer);
240 void Framebuffer::attach(FramebufferAttachment attch, TextureCube &tex, TextureCubeFace face, unsigned level)
243 set_attachment(attch, tex, level, TextureCube::get_face_index(face));
246 void Framebuffer::attach_layered(FramebufferAttachment attch, Texture3D &tex, unsigned level)
248 static Require _req(ARB_geometry_shader4);
250 set_attachment(attch, tex, level, -1);
253 void Framebuffer::attach_layered(FramebufferAttachment attch, TextureCube &tex, unsigned level)
255 static Require _req(ARB_geometry_shader4);
257 set_attachment(attch, tex, level, -1);
260 void Framebuffer::detach(FramebufferAttachment attch)
263 throw invalid_operation("Framebuffer::detach");
265 unsigned i = get_attachment_index(attch);
266 attachments[i].clear();
271 void Framebuffer::resize(const WindowView &view)
274 throw invalid_operation("Framebuffer::resize");
276 width = view.get_width();
277 height = view.get_height();
280 void Framebuffer::require_complete() const
282 if(status!=FRAMEBUFFER_COMPLETE)
283 throw framebuffer_incomplete(status);
286 void Framebuffer::set_debug_name(const string &name)
290 glObjectLabel(GL_FRAMEBUFFER, id, name.size(), name.c_str());
296 Framebuffer &Framebuffer::system()
298 static Framebuffer sys_framebuf(0);
303 Framebuffer::Attachment::Attachment(FramebufferAttachment a):
310 void Framebuffer::Attachment::set(Texture &t, unsigned l, int z)
317 void Framebuffer::Attachment::clear()