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_geometry_shader4.h>
4 #include <msp/gl/extensions/arb_internalformat_query.h>
5 #include <msp/gl/extensions/arb_internalformat_query2.h>
6 #include <msp/gl/extensions/ext_framebuffer_object.h>
7 #include <msp/gl/extensions/ext_texture_array.h>
8 #include <msp/gl/extensions/ext_texture3d.h>
9 #include <msp/gl/extensions/msp_buffer_control.h>
10 #include <msp/gl/extensions/khr_debug.h>
11 #include <msp/strings/format.h>
12 #include "framebuffer.h"
13 #include "framebuffer_backend.h"
21 OpenGLFramebuffer::OpenGLFramebuffer(bool is_system):
23 status(is_system ? GL_FRAMEBUFFER_COMPLETE : GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT)
27 static Require _req(EXT_framebuffer_object);
29 if(ARB_direct_state_access)
30 glCreateFramebuffers(1, &id);
32 glGenFramebuffers(1, &id);
36 OpenGLFramebuffer::~OpenGLFramebuffer()
39 glDeleteFramebuffers(1, &id);
42 FrameFormat OpenGLFramebuffer::get_system_format()
46 if(EXT_framebuffer_object)
49 glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER, GL_BACK, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &value);
51 glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER, GL_FRONT, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &value);
53 format = (format,COLOR_ATTACHMENT);
55 glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER, GL_DEPTH, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &value);
57 format = (format,DEPTH_ATTACHMENT);
59 glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER, GL_STENCIL, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &value);
61 format = (format,STENCIL_ATTACHMENT);
67 void OpenGLFramebuffer::get_system_size(unsigned &width, unsigned &height)
70 glGetIntegerv(GL_VIEWPORT, view);
75 bool OpenGLFramebuffer::is_format_supported(const FrameFormat &fmt)
77 // Pretend everything is supported if we can't check
78 if(!ARB_internalformat_query || !ARB_internalformat_query2)
81 unsigned target = (fmt.get_samples()>1 ? GL_TEXTURE_2D_MULTISAMPLE : GL_TEXTURE_2D);
82 for(FrameAttachment a: fmt)
84 unsigned pf = get_gl_pixelformat(get_attachment_pixelformat(a));
86 glGetInternalformativ(target, pf, GL_FRAMEBUFFER_RENDERABLE, 1, &supported);
87 if(supported!=GL_FULL_SUPPORT)
94 void OpenGLFramebuffer::require_layered()
96 static Require _req(ARB_geometry_shader4);
99 void OpenGLFramebuffer::update(unsigned mask) const
101 const FrameFormat &format = static_cast<const Framebuffer *>(this)->format;
102 vector<GLenum> color_bufs;
103 color_bufs.reserve(format.size());
105 for(FrameAttachment a: format)
107 GLenum gl_attach_point = get_gl_attachment(a);
110 const Framebuffer::Attachment &attch = static_cast<const Framebuffer *>(this)->attachments[i];
113 if(ARB_direct_state_access)
115 if(attch.tex->target==GL_TEXTURE_2D || attch.tex->target==GL_TEXTURE_2D_MULTISAMPLE || attch.layer<0)
116 glNamedFramebufferTexture(id, gl_attach_point, attch.tex->id, attch.level);
118 glNamedFramebufferTextureLayer(id, gl_attach_point, attch.tex->id, attch.level, attch.layer);
120 else if(attch.tex->target==GL_TEXTURE_2D || attch.tex->target==GL_TEXTURE_2D_MULTISAMPLE)
121 glFramebufferTexture2D(GL_FRAMEBUFFER, gl_attach_point, attch.tex->target, attch.tex->id, attch.level);
122 else if(attch.layer<0)
123 glFramebufferTexture(GL_FRAMEBUFFER, gl_attach_point, attch.tex->id, attch.level);
124 else if(attch.tex->target==GL_TEXTURE_2D_ARRAY)
125 glFramebufferTextureLayer(GL_FRAMEBUFFER, gl_attach_point, attch.tex->id, attch.level, attch.layer);
126 else if(attch.tex->target==GL_TEXTURE_3D)
127 glFramebufferTexture3D(GL_FRAMEBUFFER, gl_attach_point, attch.tex->target, attch.tex->id, attch.level, attch.layer);
128 else if(attch.tex->target==GL_TEXTURE_CUBE_MAP)
129 glFramebufferTexture2D(GL_FRAMEBUFFER, gl_attach_point, get_gl_cube_face(static_cast<TextureCubeFace>(attch.layer)), attch.tex->id, attch.level);
131 else if(ARB_direct_state_access)
132 glNamedFramebufferTexture(id, gl_attach_point, 0, 0);
134 glFramebufferTexture2D(GL_FRAMEBUFFER, gl_attach_point, GL_TEXTURE_2D, 0, 0);
137 if(gl_attach_point!=GL_DEPTH_ATTACHMENT && gl_attach_point!=GL_STENCIL_ATTACHMENT)
138 color_bufs.push_back(gl_attach_point);
143 if(color_bufs.size()>1)
144 static Require _req(ARB_draw_buffers);
146 GLenum first_buffer = (color_bufs.empty() ? GL_NONE : color_bufs.front());
147 if(ARB_direct_state_access)
149 /* ARB_direct_state_access ties the availability of these functions to
150 framebuffers themselves, so no further checks are needed. */
151 glNamedFramebufferDrawBuffers(id, color_bufs.size(), &color_bufs[0]);
152 glNamedFramebufferReadBuffer(id, first_buffer);
157 glDrawBuffers(color_bufs.size(), &color_bufs[0]);
158 else if(MSP_buffer_control)
159 glDrawBuffer(first_buffer);
161 if(MSP_buffer_control)
162 glReadBuffer(first_buffer);
165 if(ARB_direct_state_access)
166 status = glCheckNamedFramebufferStatus(id, GL_FRAMEBUFFER);
168 status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
171 void OpenGLFramebuffer::require_complete() const
173 if(status==GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT)
174 throw framebuffer_incomplete("incomplete or unsupported attachment");
175 if(status==GL_FRAMEBUFFER_UNSUPPORTED)
176 throw framebuffer_incomplete("unsupported configuration");
177 if(status!=GL_FRAMEBUFFER_COMPLETE)
178 throw framebuffer_incomplete(Msp::format("incomplete (%#x)", status));
181 void OpenGLFramebuffer::set_debug_name(const string &name)
185 glObjectLabel(GL_FRAMEBUFFER, id, name.size(), name.c_str());