1 #include <msp/gl/extensions/arb_draw_buffers.h>
2 #include <msp/gl/extensions/arb_direct_state_access.h>
3 #include <msp/gl/extensions/arb_internalformat_query.h>
4 #include <msp/gl/extensions/arb_internalformat_query2.h>
5 #include <msp/gl/extensions/ext_framebuffer_object.h>
6 #include <msp/gl/extensions/ext_texture_array.h>
7 #include <msp/gl/extensions/ext_texture3d.h>
8 #include <msp/gl/extensions/msp_buffer_control.h>
9 #include <msp/gl/extensions/khr_debug.h>
10 #include <msp/strings/format.h>
12 #include "framebuffer.h"
13 #include "texture2d.h"
14 #include "texture2dmultisample.h"
15 #include "texture3d.h"
16 #include "windowview.h"
23 framebuffer_incomplete::framebuffer_incomplete(const std::string &reason):
28 Framebuffer::Framebuffer(unsigned i):
30 status(GL_FRAMEBUFFER_COMPLETE),
34 throw invalid_argument("System framebuffer must have id 0");
36 if(EXT_framebuffer_object)
39 glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER, GL_BACK, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &value);
41 glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER, GL_FRONT, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &value);
43 format = (format,COLOR_ATTACHMENT);
45 glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER, GL_DEPTH, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &value);
47 format = (format,DEPTH_ATTACHMENT);
49 glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER, GL_STENCIL, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &value);
51 format = (format,STENCIL_ATTACHMENT);
55 glGetIntegerv(GL_VIEWPORT, view);
60 Framebuffer::Framebuffer()
65 Framebuffer::Framebuffer(FrameAttachment fa)
71 Framebuffer::Framebuffer(const FrameFormat &f)
77 void Framebuffer::init()
79 static Require _req(EXT_framebuffer_object);
83 status = GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT;
86 if(ARB_direct_state_access)
87 glCreateFramebuffers(1, &id);
89 glGenFramebuffers(1, &id);
92 Framebuffer::~Framebuffer()
95 glDeleteFramebuffers(1, &id);
98 void Framebuffer::set_format(const FrameFormat &fmt)
100 if(!format.empty() || !id)
101 throw invalid_operation("Framebuffer::set_format");
103 throw invalid_argument("Framebuffer::set_format");
105 if(ARB_internalformat_query && ARB_internalformat_query2)
107 unsigned target = (fmt.get_samples()>1 ? GL_TEXTURE_2D_MULTISAMPLE : GL_TEXTURE_2D);
108 for(FrameAttachment a: fmt)
110 unsigned pf = get_gl_pixelformat(get_attachment_pixelformat(a));
112 glGetInternalformativ(target, pf, GL_FRAMEBUFFER_RENDERABLE, 1, &supported);
113 if(supported!=GL_FULL_SUPPORT)
114 throw invalid_argument("Framebuffer::set_format");
119 attachments.resize(format.size());
122 void Framebuffer::update() const
124 vector<GLenum> color_bufs;
125 color_bufs.reserve(format.size());
127 for(FrameAttachment a: format)
129 GLenum gl_attach_point = get_gl_attachment(a);
132 const Attachment &attch = attachments[i];
135 if(ARB_direct_state_access)
137 if(attch.tex->target==GL_TEXTURE_2D || attch.tex->target==GL_TEXTURE_2D_MULTISAMPLE || attch.layer<0)
138 glNamedFramebufferTexture(id, gl_attach_point, attch.tex->id, attch.level);
140 glNamedFramebufferTextureLayer(id, gl_attach_point, attch.tex->id, attch.level, attch.layer);
142 else if(attch.tex->target==GL_TEXTURE_2D || attch.tex->target==GL_TEXTURE_2D_MULTISAMPLE)
143 glFramebufferTexture2D(GL_FRAMEBUFFER, gl_attach_point, attch.tex->target, attch.tex->id, attch.level);
144 else if(attch.layer<0)
145 glFramebufferTexture(GL_FRAMEBUFFER, gl_attach_point, attch.tex->id, attch.level);
146 else if(attch.tex->target==GL_TEXTURE_2D_ARRAY)
147 glFramebufferTextureLayer(GL_FRAMEBUFFER, gl_attach_point, attch.tex->id, attch.level, attch.layer);
148 else if(attch.tex->target==GL_TEXTURE_3D)
149 glFramebufferTexture3D(GL_FRAMEBUFFER, gl_attach_point, attch.tex->target, attch.tex->id, attch.level, attch.layer);
150 else if(attch.tex->target==GL_TEXTURE_CUBE_MAP)
151 glFramebufferTexture2D(GL_FRAMEBUFFER, gl_attach_point, get_gl_cube_face(static_cast<TextureCubeFace>(attch.layer)), attch.tex->id, attch.level);
153 else if(ARB_direct_state_access)
154 glNamedFramebufferTexture(id, gl_attach_point, 0, 0);
156 glFramebufferTexture2D(GL_FRAMEBUFFER, gl_attach_point, GL_TEXTURE_2D, 0, 0);
159 if(gl_attach_point!=GL_DEPTH_ATTACHMENT && gl_attach_point!=GL_STENCIL_ATTACHMENT)
160 color_bufs.push_back(gl_attach_point);
165 if(color_bufs.size()>1)
166 static Require _req(ARB_draw_buffers);
168 GLenum first_buffer = (color_bufs.empty() ? GL_NONE : color_bufs.front());
169 if(ARB_direct_state_access)
171 /* ARB_direct_state_access ties the availability of these functions to
172 framebuffers themselves, so no further checks are needed. */
173 glNamedFramebufferDrawBuffers(id, color_bufs.size(), &color_bufs[0]);
174 glNamedFramebufferReadBuffer(id, first_buffer);
179 glDrawBuffers(color_bufs.size(), &color_bufs[0]);
180 else if(MSP_buffer_control)
181 glDrawBuffer(first_buffer);
183 if(MSP_buffer_control)
184 glReadBuffer(first_buffer);
187 if(ARB_direct_state_access)
188 status = glCheckNamedFramebufferStatus(id, GL_FRAMEBUFFER);
190 status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
195 void Framebuffer::check_size()
198 for(Attachment &a: attachments)
203 if(a.tex->target==GL_TEXTURE_2D)
205 Texture2D *tex = static_cast<Texture2D *>(a.tex);
206 w = max(tex->get_width()>>a.level, 1U);
207 h = max(tex->get_height()>>a.level, 1U);
209 else if(a.tex->target==GL_TEXTURE_2D_MULTISAMPLE)
211 Texture2DMultisample *tex = static_cast<Texture2DMultisample *>(a.tex);
212 w = tex->get_width();
213 h = tex->get_height();
215 else if(a.tex->target==GL_TEXTURE_3D || a.tex->target==GL_TEXTURE_2D_ARRAY)
217 Texture3D *tex = static_cast<Texture3D *>(a.tex);
218 w = max(tex->get_width()>>a.level, 1U);
219 h = max(tex->get_height()>>a.level, 1U);
221 else if(a.tex->target==GL_TEXTURE_CUBE_MAP)
223 w = max(static_cast<TextureCube *>(a.tex)->get_size()>>a.level, 1U);
235 width = min(width, w);
236 height = min(height, h);
241 void Framebuffer::set_attachment(FrameAttachment attch, Texture &tex, unsigned level, int layer, unsigned samples)
243 if(format.empty() || !id)
244 throw invalid_operation("Framebuffer::attach");
246 if((format.get_samples()>1 && samples!=format.get_samples()) || (format.get_samples()==1 && samples))
247 throw incompatible_data("Framebuffer::attach");
250 for(FrameAttachment a: format)
254 attachments[i].set(tex, level, layer);
262 throw incompatible_data("Framebuffer::attach");
265 void Framebuffer::attach(FrameAttachment attch, Texture2D &tex, unsigned level)
267 set_attachment(make_typed_attachment(attch, tex.get_format()), tex, level, 0, 0);
270 void Framebuffer::attach(FrameAttachment attch, Texture2DMultisample &tex)
272 set_attachment(make_typed_attachment(attch, tex.get_format()), tex, 0, 0, tex.get_samples());
275 void Framebuffer::attach(FrameAttachment attch, Texture3D &tex, unsigned layer, unsigned level)
277 set_attachment(make_typed_attachment(attch, tex.get_format()), tex, level, layer, 0);
280 void Framebuffer::attach(FrameAttachment attch, TextureCube &tex, TextureCubeFace face, unsigned level)
282 set_attachment(make_typed_attachment(attch, tex.get_format()), tex, level, face, 0);
285 void Framebuffer::attach_layered(FrameAttachment attch, Texture3D &tex, unsigned level)
287 static Require _req(ARB_geometry_shader4);
288 set_attachment(make_typed_attachment(attch, tex.get_format()), tex, level, -1, 0);
291 void Framebuffer::attach_layered(FrameAttachment attch, TextureCube &tex, unsigned level)
293 static Require _req(ARB_geometry_shader4);
294 set_attachment(make_typed_attachment(attch, tex.get_format()), tex, level, -1, 0);
297 void Framebuffer::detach(FrameAttachment attch)
300 throw invalid_operation("Framebuffer::detach");
302 int i = format.index(attch);
305 attachments[i].clear();
311 void Framebuffer::resize(const WindowView &view)
314 throw invalid_operation("Framebuffer::resize");
316 width = view.get_width();
317 height = view.get_height();
320 void Framebuffer::require_complete() const
325 bool layered = (!attachments.empty() && attachments.front().layer<0);
326 for(const Attachment &a: attachments)
329 throw framebuffer_incomplete("missing attachment");
330 if(layered!=(a.layer<0))
331 throw framebuffer_incomplete("inconsistent layering");
334 if(status==GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT)
335 throw framebuffer_incomplete("incomplete or unsupported attachment");
336 if(status==GL_FRAMEBUFFER_UNSUPPORTED)
337 throw framebuffer_incomplete("unsupported configuration");
338 if(status!=GL_FRAMEBUFFER_COMPLETE)
339 throw framebuffer_incomplete(Msp::format("incomplete (%#x)", status));
342 void Framebuffer::set_debug_name(const string &name)
346 glObjectLabel(GL_FRAMEBUFFER, id, name.size(), name.c_str());
352 Framebuffer &Framebuffer::system()
354 static Framebuffer sys_framebuf(0);
359 Framebuffer::Attachment::Attachment():
365 void Framebuffer::Attachment::set(Texture &t, unsigned l, int z)
372 void Framebuffer::Attachment::clear()