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 void OpenGLFramebuffer::set_system_format(const FrameFormat &fmt)
44 static_cast<Framebuffer *>(this)->format = fmt;
47 bool OpenGLFramebuffer::is_format_supported(const FrameFormat &fmt)
49 // Pretend everything is supported if we can't check
50 if(!ARB_internalformat_query || !ARB_internalformat_query2)
53 unsigned target = (fmt.get_samples()>1 ? GL_TEXTURE_2D_MULTISAMPLE : GL_TEXTURE_2D);
54 for(FrameAttachment a: fmt)
56 unsigned pf = get_gl_pixelformat(get_attachment_pixelformat(a));
58 glGetInternalformativ(target, pf, GL_FRAMEBUFFER_RENDERABLE, 1, &supported);
59 if(supported!=GL_FULL_SUPPORT)
66 void OpenGLFramebuffer::require_layered()
68 static Require _req(ARB_geometry_shader4);
71 void OpenGLFramebuffer::resize_system(unsigned w, unsigned h)
73 Framebuffer *self = static_cast<Framebuffer *>(this);
78 void OpenGLFramebuffer::update(unsigned mask) const
80 const FrameFormat &format = static_cast<const Framebuffer *>(this)->format;
81 vector<GLenum> color_bufs;
82 color_bufs.reserve(format.size());
84 for(FrameAttachment a: format)
86 GLenum gl_attach_point = get_gl_attachment(a);
89 const Framebuffer::Attachment &attch = static_cast<const Framebuffer *>(this)->attachments[i];
92 if(ARB_direct_state_access)
94 if(attch.tex->target==GL_TEXTURE_2D || attch.tex->target==GL_TEXTURE_2D_MULTISAMPLE || attch.layer<0)
95 glNamedFramebufferTexture(id, gl_attach_point, attch.tex->id, attch.level);
97 glNamedFramebufferTextureLayer(id, gl_attach_point, attch.tex->id, attch.level, attch.layer);
99 else if(attch.tex->target==GL_TEXTURE_2D || attch.tex->target==GL_TEXTURE_2D_MULTISAMPLE)
100 glFramebufferTexture2D(GL_FRAMEBUFFER, gl_attach_point, attch.tex->target, attch.tex->id, attch.level);
101 else if(attch.layer<0)
102 glFramebufferTexture(GL_FRAMEBUFFER, gl_attach_point, attch.tex->id, attch.level);
103 else if(attch.tex->target==GL_TEXTURE_2D_ARRAY)
104 glFramebufferTextureLayer(GL_FRAMEBUFFER, gl_attach_point, attch.tex->id, attch.level, attch.layer);
105 else if(attch.tex->target==GL_TEXTURE_3D)
106 glFramebufferTexture3D(GL_FRAMEBUFFER, gl_attach_point, attch.tex->target, attch.tex->id, attch.level, attch.layer);
107 else if(attch.tex->target==GL_TEXTURE_CUBE_MAP)
108 glFramebufferTexture2D(GL_FRAMEBUFFER, gl_attach_point, get_gl_cube_face(static_cast<TextureCubeFace>(attch.layer)), attch.tex->id, attch.level);
110 else if(ARB_direct_state_access)
111 glNamedFramebufferTexture(id, gl_attach_point, 0, 0);
113 glFramebufferTexture2D(GL_FRAMEBUFFER, gl_attach_point, GL_TEXTURE_2D, 0, 0);
116 if(gl_attach_point!=GL_DEPTH_ATTACHMENT && gl_attach_point!=GL_STENCIL_ATTACHMENT)
117 color_bufs.push_back(gl_attach_point);
122 if(color_bufs.size()>1)
123 static Require _req(ARB_draw_buffers);
125 GLenum first_buffer = (color_bufs.empty() ? GL_NONE : color_bufs.front());
126 if(ARB_direct_state_access)
128 /* ARB_direct_state_access ties the availability of these functions to
129 framebuffers themselves, so no further checks are needed. */
130 glNamedFramebufferDrawBuffers(id, color_bufs.size(), &color_bufs[0]);
131 glNamedFramebufferReadBuffer(id, first_buffer);
136 glDrawBuffers(color_bufs.size(), &color_bufs[0]);
137 else if(MSP_buffer_control)
138 glDrawBuffer(first_buffer);
140 if(MSP_buffer_control)
141 glReadBuffer(first_buffer);
144 if(ARB_direct_state_access)
145 status = glCheckNamedFramebufferStatus(id, GL_FRAMEBUFFER);
147 status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
150 void OpenGLFramebuffer::require_complete() const
152 if(status==GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT)
153 throw framebuffer_incomplete("incomplete or unsupported attachment");
154 if(status==GL_FRAMEBUFFER_UNSUPPORTED)
155 throw framebuffer_incomplete("unsupported configuration");
156 if(status!=GL_FRAMEBUFFER_COMPLETE)
157 throw framebuffer_incomplete(Msp::format("incomplete (%#x)", status));
160 void OpenGLFramebuffer::set_debug_name(const string &name)
164 glObjectLabel(GL_FRAMEBUFFER, id, name.size(), name.c_str());