X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fframebuffer.cpp;h=cf478ce29b686d842ce2074078952633b2e47b02;hp=98722195e32e8b10d40a43ab3d458d4c1ae5f4af;hb=9d1fa012a23693768bbe287371e97751c03acc50;hpb=e1df3aa732d4d2d03f6ac72a8dead099937a0468

diff --git a/source/framebuffer.cpp b/source/framebuffer.cpp
index 98722195..cf478ce2 100644
--- a/source/framebuffer.cpp
+++ b/source/framebuffer.cpp
@@ -1,17 +1,67 @@
-#include "arb_draw_buffers.h"
+#include <msp/gl/extensions/arb_draw_buffers.h>
+#include <msp/gl/extensions/arb_direct_state_access.h>
+#include <msp/gl/extensions/ext_framebuffer_blit.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 "error.h"
-#include "ext_framebuffer_blit.h"
-#include "ext_framebuffer_object.h"
 #include "framebuffer.h"
 #include "misc.h"
 #include "renderbuffer.h"
 #include "texture2d.h"
+#include "texture3d.h"
 
 using namespace std;
 
 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::Framebuffer(unsigned i):
 	id(i),
 	dirty(0)
@@ -19,10 +69,9 @@ Framebuffer::Framebuffer(unsigned i):
 	if(id)
 		throw invalid_argument("System framebuffer must have id 0");
 
-	int viewport[4];
-	glGetIntegerv(GL_VIEWPORT, viewport);
-	width = viewport[2];
-	height = viewport[3];
+	glGetIntegerv(GL_VIEWPORT, &view.left);
+	width = view.width;
+	height = view.height;
 }
 
 Framebuffer::Framebuffer():
@@ -32,7 +81,10 @@ Framebuffer::Framebuffer():
 {
 	static Require _req(EXT_framebuffer_object);
 
-	glGenFramebuffers(1, &id);
+	if(ARB_direct_state_access)
+		glCreateFramebuffers(1, &id);
+	else
+		glGenFramebuffers(1, &id);
 }
 
 Framebuffer::~Framebuffer()
@@ -45,51 +97,88 @@ Framebuffer::~Framebuffer()
 
 void Framebuffer::update_attachment(unsigned mask) const
 {
-	if(current()==this)
+	if(!ARB_direct_state_access && current()!=this)
 	{
-		std::vector<GLenum> color_bufs;
-		color_bufs.reserve(attachments.size());
-		for(unsigned i=0; i<attachments.size(); ++i)
+		dirty |= mask;
+		return;
+	}
+
+	std::vector<GLenum> color_bufs;
+	color_bufs.reserve(attachments.size());
+	for(unsigned i=0; i<attachments.size(); ++i)
+	{
+		const Attachment &attch = attachments[i];
+		if(mask&(1<<i))
 		{
-			const Attachment &attch = attachments[i];
-			if(mask&(1<<i))
+			if(attch.type==GL_RENDERBUFFER)
 			{
-				if(attch.type==GL_RENDERBUFFER)
+				if(ARB_direct_state_access)
+					glNamedFramebufferRenderbuffer(id, attch.attachment, GL_RENDERBUFFER, attch.rbuf->get_id());
+				else
 					glFramebufferRenderbuffer(GL_FRAMEBUFFER, attch.attachment, GL_RENDERBUFFER, attch.rbuf->get_id());
-				else if(attch.type==GL_TEXTURE_2D)
-				{
-					static_cast<Texture2D *>(attch.tex)->allocate(attch.level);
+			}
+			else if(attch.type==GL_TEXTURE_2D)
+			{
+				static_cast<Texture2D *>(attch.tex)->allocate(attch.level);
+				if(ARB_direct_state_access)
+					glNamedFramebufferTexture(id, attch.attachment, attch.tex->get_id(), attch.level);
+				else
 					glFramebufferTexture2D(GL_FRAMEBUFFER, attch.attachment, attch.type, attch.tex->get_id(), attch.level);
-				}
-				else if(attch.type==GL_TEXTURE_CUBE_MAP)
-				{
-					static_cast<TextureCube *>(attch.tex)->allocate(attch.level);
-					glFramebufferTexture2D(GL_FRAMEBUFFER, attch.attachment, attch.cube_face, attch.tex->get_id(), attch.level);
-				}
+			}
+			else if(attch.type==GL_TEXTURE_3D || attch.type==GL_TEXTURE_2D_ARRAY)
+			{
+				static_cast<Texture3D *>(attch.tex)->allocate(attch.level);
+				if(ARB_direct_state_access)
+					glNamedFramebufferTextureLayer(id, attch.attachment, attch.tex->get_id(), attch.level, attch.layer);
+				else if(attch.type==GL_TEXTURE_2D_ARRAY)
+					glFramebufferTextureLayer(GL_FRAMEBUFFER, attch.attachment, attch.tex->get_id(), attch.level, attch.layer);
 				else
-					glFramebufferRenderbuffer(GL_FRAMEBUFFER, attch.attachment, 0, 0);
+					glFramebufferTexture3D(GL_FRAMEBUFFER, attch.attachment, attch.type, attch.tex->get_id(), attch.level, attch.layer);
 			}
-
-			if(attch.attachment>=COLOR_ATTACHMENT0 && attch.attachment<=COLOR_ATTACHMENT3)
-				color_bufs.push_back(attch.attachment);
+			else if(attch.type==GL_TEXTURE_CUBE_MAP)
+			{
+				static_cast<TextureCube *>(attch.tex)->allocate(attch.level);
+				if(ARB_direct_state_access)
+					glNamedFramebufferTextureLayer(id, attch.attachment, attch.tex->get_id(), attch.level, attch.layer);
+				else
+					glFramebufferTexture2D(GL_FRAMEBUFFER, attch.attachment, TextureCube::enumerate_faces(attch.layer), attch.tex->get_id(), attch.level);
+			}
+			else if(ARB_direct_state_access)
+				glNamedFramebufferRenderbuffer(id, attch.attachment, 0, 0);
+			else
+				glFramebufferRenderbuffer(GL_FRAMEBUFFER, attch.attachment, 0, 0);
 		}
 
-		if(color_bufs.empty())
-			glDrawBuffer(GL_NONE);
-		else if(color_bufs.size()==1)
-			glDrawBuffer(color_bufs.front());
-		else
-		{
-			static Require _req(ARB_draw_buffers);
-			glDrawBuffers(color_bufs.size(), &color_bufs[0]);
-		}
+		if(attch.attachment>=COLOR_ATTACHMENT0 && attch.attachment<=COLOR_ATTACHMENT3)
+			color_bufs.push_back(attch.attachment);
+	}
+
+	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
-		dirty |= mask;
+	{
+		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);
+	}
 }
 
 void Framebuffer::check_size()
 {
+	bool full_viewport = (view.left==0 && view.bottom==0 && view.width==width && view.height==height);
 	for(vector<Attachment>::iterator i=attachments.begin(); i!=attachments.end(); ++i)
 		if(i->type)
 		{
@@ -101,16 +190,22 @@ void Framebuffer::check_size()
 			else if(i->type==GL_TEXTURE_2D)
 			{
 				Texture2D *tex = static_cast<Texture2D *>(i->tex);
-				width = tex->get_width();
-				height = tex->get_height();
+				width = max(tex->get_width()>>i->level, 1U);
+				height = max(tex->get_height()>>i->level, 1U);
+			}
+			else if(i->type==GL_TEXTURE_3D || i->type==GL_TEXTURE_2D_ARRAY)
+			{
+				Texture3D *tex = static_cast<Texture3D *>(i->tex);
+				width = max(tex->get_width()>>i->level, 1U);
+				height = max(tex->get_height()>>i->level, 1U);
 			}
 			else if(i->type==GL_TEXTURE_CUBE_MAP)
 			{
-				width = static_cast<TextureCube *>(i->tex)->get_size();
+				width = max(static_cast<TextureCube *>(i->tex)->get_size()>>i->level, 1U);
 				height = width;
 			}
-			if(current()==this)
-				glViewport(0, 0, width, height);
+			if(full_viewport)
+				reset_viewport();
 			break;
 		}
 }
@@ -141,7 +236,18 @@ void Framebuffer::attach(FramebufferAttachment attch, Texture2D &tex, unsigned l
 		throw invalid_operation("Framebuffer::attach");
 
 	unsigned i = get_attachment_index(attch);
-	attachments[i].set(tex, 0, level);
+	attachments[i].set(tex, level, 0);
+	update_attachment(1<<i);
+	check_size();
+}
+
+void Framebuffer::attach(FramebufferAttachment attch, Texture3D &tex, unsigned layer, unsigned level)
+{
+	if(!id)
+		throw invalid_operation("Framebuffer::attach");
+
+	unsigned i = get_attachment_index(attch);
+	attachments[i].set(tex, level, layer);
 	update_attachment(1<<i);
 	check_size();
 }
@@ -152,7 +258,7 @@ void Framebuffer::attach(FramebufferAttachment attch, TextureCube &tex, TextureC
 		throw invalid_operation("Framebuffer::attach");
 
 	unsigned i = get_attachment_index(attch);
-	attachments[i].set(tex, face, level);
+	attachments[i].set(tex, level, TextureCube::get_face_index(face));
 	update_attachment(1<<i);
 	check_size();
 }
@@ -170,13 +276,41 @@ void Framebuffer::detach(FramebufferAttachment attch)
 
 FramebufferStatus Framebuffer::check_status() const
 {
-	Bind _bind(this, true);
-	return static_cast<FramebufferStatus>(glCheckFramebufferStatus(GL_FRAMEBUFFER));
+	if(ARB_direct_state_access)
+		return static_cast<FramebufferStatus>(glCheckNamedFramebufferStatus(id, GL_FRAMEBUFFER));
+	else
+	{
+		BindRestore _bind(this);
+		return static_cast<FramebufferStatus>(glCheckFramebufferStatus(GL_FRAMEBUFFER));
+	}
+}
+
+void Framebuffer::require_complete() const
+{
+	FramebufferStatus status = check_status();
+	if(status!=FRAMEBUFFER_COMPLETE)
+		throw framebuffer_incomplete(status);
+}
+
+void Framebuffer::viewport(int l, int b, unsigned w, unsigned h)
+{
+	view.left = l;
+	view.bottom = b;
+	view.width = w;
+	view.height = h;
+
+	if(current()==this)
+		glViewport(view.left, view.bottom, view.width, view.height);
+}
+
+void Framebuffer::reset_viewport()
+{
+	viewport(0, 0, width, height);
 }
 
 void Framebuffer::clear(BufferBits bits)
 {
-	Bind _bind(this, true);
+	BindRestore _bind(this);
 	glClear(bits);
 }
 
@@ -184,6 +318,12 @@ void Framebuffer::blit_from(const Framebuffer &other, int sx0, int sy0, int sx1,
 {
 	static Require _req(EXT_framebuffer_blit);
 
+	if(ARB_direct_state_access)
+	{
+		glBlitNamedFramebuffer(other.id, id, sx0, sy0, sx1, sy1, dx0, dy0, dx1, dy1, bits, (filter ? GL_LINEAR : GL_NEAREST));
+		return;
+	}
+
 	const Framebuffer *old = current();
 	if(set_current(this))
 	{
@@ -223,13 +363,14 @@ void Framebuffer::bind() const
 			update_attachment(dirty);
 			dirty = 0;
 		}
+
 		if(width && height)
-			glViewport(0, 0, width, height);
+			glViewport(view.left, view.bottom, view.width, view.height);
 	}
 }
 
 const Framebuffer *Framebuffer::current()
-{	
+{
 	if(!cur_obj)
 		cur_obj = &system();
 	return cur_obj;
@@ -250,7 +391,8 @@ Framebuffer &Framebuffer::system()
 Framebuffer::Attachment::Attachment(FramebufferAttachment a):
 	attachment(a),
 	type(0),
-	level(0)
+	level(0),
+	layer(0)
 { }
 
 void Framebuffer::Attachment::set(Renderbuffer &r)
@@ -258,14 +400,15 @@ void Framebuffer::Attachment::set(Renderbuffer &r)
 	type = GL_RENDERBUFFER;
 	rbuf = &r;
 	level = 0;
+	layer = 0;
 }
 
-void Framebuffer::Attachment::set(Texture &t, GLenum f, unsigned l)
+void Framebuffer::Attachment::set(Texture &t, unsigned l, unsigned z)
 {
 	type = t.get_target();
 	tex = &t;
-	cube_face = f;
 	level = l;
+	layer = z;
 }
 
 void Framebuffer::Attachment::clear()
@@ -273,5 +416,13 @@ void Framebuffer::Attachment::clear()
 	type = 0;
 }
 
+
+Framebuffer::Viewport::Viewport():
+	left(0),
+	bottom(0),
+	width(0),
+	height(0)
+{ }
+
 } // namespace GL
 } // namespace Msp