-#include <msp/gl/extensions/arb_draw_buffers.h>
-#include <msp/gl/extensions/arb_direct_state_access.h>
-#include <msp/gl/extensions/ext_framebuffer_object.h>
-#include <msp/gl/extensions/ext_texture_array.h>
-#include <msp/gl/extensions/ext_texture3d.h>
-#include <msp/gl/extensions/msp_buffer_control.h>
-#include <msp/gl/extensions/khr_debug.h>
#include "error.h"
#include "framebuffer.h"
-#include "misc.h"
#include "texture2d.h"
#include "texture2dmultisample.h"
#include "texture3d.h"
namespace Msp {
namespace GL {
-void operator<<(LexicalConverter &conv, FramebufferStatus status)
-{
- switch(status)
- {
- case FRAMEBUFFER_INCOMPLETE_ATTACHMENT:
- conv.result("incomplete attachment");
- break;
- case FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:
- conv.result("missing attachment");
- break;
- case FRAMEBUFFER_INCOMPLETE_DIMENSIONS:
- conv.result("mismatched attachment dimensions");
- break;
- case FRAMEBUFFER_INCOMPLETE_FORMATS:
- conv.result("mismatched attachment formats");
- break;
- case FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER:
- conv.result("missing draw buffer attachment");
- break;
- case FRAMEBUFFER_INCOMPLETE_READ_BUFFER:
- conv.result("missing read buffer attachment");
- break;
- case FRAMEBUFFER_INCOMPLETE_MULTISAMPLE:
- conv.result("mismatched attachment sample counts");
- break;
- case FRAMEBUFFER_INCOMPLETE_LAYER_COUNT:
- conv.result("mismatched attachment layer counts");
- break;
- case FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS:
- conv.result("mismatched attachment layering");
- break;
- case FRAMEBUFFER_UNSUPPORTED:
- conv.result("unsupported");
- break;
- default:
- conv.result(lexical_cast<string, unsigned>(status, "%#x"));
- break;
- }
-}
-
-framebuffer_incomplete::framebuffer_incomplete(FramebufferStatus status):
- runtime_error(lexical_cast<string>(status))
+framebuffer_incomplete::framebuffer_incomplete(const std::string &reason):
+ runtime_error(reason)
{ }
-Framebuffer::Framebuffer(unsigned i):
- id(i),
- status(FRAMEBUFFER_COMPLETE),
- dirty(0)
-{
- if(id)
- throw invalid_argument("System framebuffer must have id 0");
-
- int view[4];
- glGetIntegerv(GL_VIEWPORT, view);
- width = view[2];
- height = view[3];
-}
+Framebuffer::Framebuffer(bool s):
+ FramebufferBackend(s)
+{ }
-Framebuffer::Framebuffer()
-{
- init();
-}
+Framebuffer::Framebuffer():
+ FramebufferBackend(false)
+{ }
-Framebuffer::Framebuffer(FrameAttachment fa)
+Framebuffer::Framebuffer(FrameAttachment fa):
+ Framebuffer()
{
- init();
set_format(fa);
}
-Framebuffer::Framebuffer(const FrameFormat &f)
+Framebuffer::Framebuffer(const FrameFormat &f):
+ Framebuffer()
{
- init();
set_format(f);
}
-void Framebuffer::init()
-{
- static Require _req(EXT_framebuffer_object);
-
- width = 0;
- height = 0;
- status = FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT;
- dirty = 0;
-
- if(ARB_direct_state_access)
- glCreateFramebuffers(1, &id);
- else
- glGenFramebuffers(1, &id);
-}
-
-Framebuffer::~Framebuffer()
-{
- if(id)
- glDeleteFramebuffers(1, &id);
-}
-
void Framebuffer::set_format(const FrameFormat &fmt)
{
if(!format.empty())
throw invalid_operation("Framebuffer::set_format");
- if(fmt.empty())
+ if(fmt.empty() || !is_format_supported(fmt))
throw invalid_argument("Framebuffer::set_format");
format = fmt;
attachments.resize(format.size());
+ format_changed(format);
}
void Framebuffer::update() const
{
- vector<GLenum> color_bufs;
- color_bufs.reserve(format.size());
- unsigned i = 0;
- for(FrameAttachment a: format)
- {
- GLenum gl_attach_point = get_gl_attachment(a);
- if(dirty&(1<<i))
- {
- const Attachment &attch = attachments[i];
- if(attch.tex)
- {
- GLenum type = attch.tex->get_target();
- if(ARB_direct_state_access)
- {
- if(type==GL_TEXTURE_2D || type==GL_TEXTURE_2D_MULTISAMPLE || attch.layer<0)
- glNamedFramebufferTexture(id, gl_attach_point, attch.tex->get_id(), attch.level);
- else
- glNamedFramebufferTextureLayer(id, gl_attach_point, attch.tex->get_id(), attch.level, attch.layer);
- }
- else if(type==GL_TEXTURE_2D || type==GL_TEXTURE_2D_MULTISAMPLE)
- glFramebufferTexture2D(GL_FRAMEBUFFER, gl_attach_point, type, attch.tex->get_id(), attch.level);
- else if(attch.layer<0)
- glFramebufferTexture(GL_FRAMEBUFFER, gl_attach_point, attch.tex->get_id(), attch.level);
- else if(type==GL_TEXTURE_2D_ARRAY)
- glFramebufferTextureLayer(GL_FRAMEBUFFER, gl_attach_point, attch.tex->get_id(), attch.level, attch.layer);
- else if(type==GL_TEXTURE_3D)
- glFramebufferTexture3D(GL_FRAMEBUFFER, gl_attach_point, type, attch.tex->get_id(), attch.level, attch.layer);
- else if(type==GL_TEXTURE_CUBE_MAP)
- glFramebufferTexture2D(GL_FRAMEBUFFER, gl_attach_point, TextureCube::enumerate_faces(attch.layer), attch.tex->get_id(), attch.level);
- }
- else if(ARB_direct_state_access)
- glNamedFramebufferTexture(id, gl_attach_point, 0, 0);
- else
- glFramebufferTexture2D(GL_FRAMEBUFFER, gl_attach_point, GL_TEXTURE_2D, 0, 0);
- }
-
- if(gl_attach_point!=GL_DEPTH_ATTACHMENT && gl_attach_point!=GL_STENCIL_ATTACHMENT)
- color_bufs.push_back(gl_attach_point);
-
- ++i;
- }
-
- if(color_bufs.size()>1)
- static Require _req(ARB_draw_buffers);
-
- GLenum first_buffer = (color_bufs.empty() ? GL_NONE : color_bufs.front());
- if(ARB_direct_state_access)
- {
- /* ARB_direct_state_access ties the availability of these functions to
- framebuffers themselves, so no further checks are needed. */
- glNamedFramebufferDrawBuffers(id, color_bufs.size(), &color_bufs[0]);
- glNamedFramebufferReadBuffer(id, first_buffer);
- }
- else
- {
- if(ARB_draw_buffers)
- glDrawBuffers(color_bufs.size(), &color_bufs[0]);
- else if(MSP_buffer_control)
- glDrawBuffer(first_buffer);
-
- if(MSP_buffer_control)
- glReadBuffer(first_buffer);
- }
-
- if(ARB_direct_state_access)
- status = static_cast<FramebufferStatus>(glCheckNamedFramebufferStatus(id, GL_FRAMEBUFFER));
- else
- status = static_cast<FramebufferStatus>(glCheckFramebufferStatus(GL_FRAMEBUFFER));
-
+ FramebufferBackend::update(dirty);
dirty = 0;
}
for(Attachment &a: attachments)
if(a.tex)
{
- GLenum type = a.tex->get_target();
unsigned w = 0;
unsigned h = 0;
- if(type==GL_TEXTURE_2D)
+ unsigned l = 1;
+ if(const Texture2D *tex2d = dynamic_cast<const Texture2D *>(a.tex))
{
- Texture2D *tex = static_cast<Texture2D *>(a.tex);
- w = max(tex->get_width()>>a.level, 1U);
- h = max(tex->get_height()>>a.level, 1U);
+ w = max(tex2d->get_width()>>a.level, 1U);
+ h = max(tex2d->get_height()>>a.level, 1U);
}
- else if(type==GL_TEXTURE_2D_MULTISAMPLE)
+ else if(const Texture2DMultisample *tex2d_ms = dynamic_cast<const Texture2DMultisample *>(a.tex))
{
- Texture2DMultisample *tex = static_cast<Texture2DMultisample *>(a.tex);
- w = tex->get_width();
- h = tex->get_height();
+ w = tex2d_ms->get_width();
+ h = tex2d_ms->get_height();
}
- else if(type==GL_TEXTURE_3D || type==GL_TEXTURE_2D_ARRAY)
+ else if(const Texture3D *tex3d = dynamic_cast<const Texture3D *>(a.tex))
{
- Texture3D *tex = static_cast<Texture3D *>(a.tex);
- w = max(tex->get_width()>>a.level, 1U);
- h = max(tex->get_height()>>a.level, 1U);
+ w = max(tex3d->get_width()>>a.level, 1U);
+ h = max(tex3d->get_height()>>a.level, 1U);
+ l = (a.layer<0 ? tex3d->get_depth() : 1);
}
- else if(type==GL_TEXTURE_CUBE_MAP)
+ else if(const TextureCube *tex_cube = dynamic_cast<const TextureCube *>(a.tex))
{
- w = max(static_cast<TextureCube *>(a.tex)->get_size()>>a.level, 1U);
+ w = max(tex_cube->get_size()>>a.level, 1U);
h = w;
+ l = (a.layer<0 ? 6 : 1);
}
if(first)
{
width = w;
height = h;
+ layers = l;
first = false;
}
else
{
width = min(width, w);
height = min(height, h);
+ layers = min(layers, l);
}
}
}
-void Framebuffer::set_attachment(FrameAttachment attch, Texture &tex, unsigned level, int layer, unsigned samples)
+void Framebuffer::set_attachment(FrameAttachment attch, Texture &tex, Texture *res, unsigned level, int layer, unsigned samples)
{
- if(format.empty() || !id)
+ if(format.empty() || attachments.empty())
throw invalid_operation("Framebuffer::attach");
if((format.get_samples()>1 && samples!=format.get_samples()) || (format.get_samples()==1 && samples))
{
if(a==attch)
{
- attachments[i].set(tex, level, layer);
+ attachments[i].set(tex, res, level, layer);
dirty |= 1<<i;
check_size();
return;
void Framebuffer::attach(FrameAttachment attch, Texture2D &tex, unsigned level)
{
- set_attachment(make_typed_attachment(attch, tex.get_format()), tex, level, 0, 0);
+ set_attachment(make_typed_attachment(attch, tex.get_format()), tex, 0, level, 0, 0);
}
-void Framebuffer::attach(FrameAttachment attch, Texture2DMultisample &tex)
+void Framebuffer::attach(FrameAttachment attch, Texture2DMultisample &tex, Texture2D *res)
{
- set_attachment(make_typed_attachment(attch, tex.get_format()), tex, 0, 0, tex.get_samples());
+ set_attachment(make_typed_attachment(attch, tex.get_format()), tex, res, 0, 0, tex.get_samples());
}
void Framebuffer::attach(FrameAttachment attch, Texture3D &tex, unsigned layer, unsigned level)
{
- set_attachment(make_typed_attachment(attch, tex.get_format()), tex, level, layer, 0);
+ set_attachment(make_typed_attachment(attch, tex.get_format()), tex, 0, level, layer, 0);
}
void Framebuffer::attach(FrameAttachment attch, TextureCube &tex, TextureCubeFace face, unsigned level)
{
- set_attachment(make_typed_attachment(attch, tex.get_format()), tex, level, TextureCube::get_face_index(face), 0);
+ set_attachment(make_typed_attachment(attch, tex.get_format()), tex, 0, level, face, 0);
}
void Framebuffer::attach_layered(FrameAttachment attch, Texture3D &tex, unsigned level)
{
- static Require _req(ARB_geometry_shader4);
- set_attachment(make_typed_attachment(attch, tex.get_format()), tex, level, -1, 0);
+ require_layered();
+ set_attachment(make_typed_attachment(attch, tex.get_format()), tex, 0, level, -1, 0);
}
void Framebuffer::attach_layered(FrameAttachment attch, TextureCube &tex, unsigned level)
{
- static Require _req(ARB_geometry_shader4);
- set_attachment(make_typed_attachment(attch, tex.get_format()), tex, level, -1, 0);
+ require_layered();
+ set_attachment(make_typed_attachment(attch, tex.get_format()), tex, 0, level, -1, 0);
}
void Framebuffer::detach(FrameAttachment attch)
{
- if(!id)
+ if(attachments.empty())
throw invalid_operation("Framebuffer::detach");
int i = format.index(attch);
}
}
-void Framebuffer::resize(const WindowView &view)
+const Texture *Framebuffer::get_attachment(FrameAttachment attch) const
{
- if(id)
- throw invalid_operation("Framebuffer::resize");
+ if(attachments.empty())
+ return 0;
- width = view.get_width();
- height = view.get_height();
+ int i = format.index(attch);
+ return (i>=0 ? attachments[i].tex : 0);
}
-void Framebuffer::require_complete() const
+const Texture *Framebuffer::get_attachment(unsigned i) const
{
- if(status!=FRAMEBUFFER_COMPLETE)
- throw framebuffer_incomplete(status);
+ return (i<attachments.size() ? attachments[i].tex : 0);
}
-void Framebuffer::set_debug_name(const string &name)
+const Texture *Framebuffer::get_resolve_attachment(FrameAttachment attch) const
{
-#ifdef DEBUG
- if(KHR_debug)
- glObjectLabel(GL_FRAMEBUFFER, id, name.size(), name.c_str());
-#else
- (void)name;
-#endif
+ if(attachments.empty())
+ return 0;
+
+ int i = format.index(attch);
+ return (i>=0 ? attachments[i].resolve : 0);
}
-Framebuffer &Framebuffer::system()
+const Texture *Framebuffer::get_resolve_attachment(unsigned i) const
{
- static Framebuffer sys_framebuf(0);
- return sys_framebuf;
+ return (i<attachments.size() ? attachments[i].resolve : 0);
}
+bool Framebuffer::has_resolve_attachments() const
+{
+ for(const Attachment &a: attachments)
+ if(a.resolve)
+ return true;
+ return false;
+}
+
+void Framebuffer::require_complete() const
+{
+ bool layered = (!attachments.empty() && attachments.front().layer<0);
+ for(const Attachment &a: attachments)
+ {
+ if(!a.tex)
+ throw framebuffer_incomplete("missing attachment");
+ if(layered!=(a.layer<0))
+ throw framebuffer_incomplete("inconsistent layering");
+ }
+
+ FramebufferBackend::require_complete();
+}
-Framebuffer::Attachment::Attachment():
- tex(0),
- level(0),
- layer(0)
-{ }
-void Framebuffer::Attachment::set(Texture &t, unsigned l, int z)
+void Framebuffer::Attachment::set(Texture &t, Texture *r, unsigned l, int z)
{
tex = &t;
+ resolve = r;
level = l;
layer = z;
}
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