X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fframebuffer.cpp;h=8e8be663e32f3ad48430b84eb9a55e1ed24543a0;hb=619aae12e01f25e79626a94c973927e5599e99a5;hp=77ac21be6b0e6ef76da3928247b54b2c69074c5b;hpb=c4cacaf8f9225e006e6bb35f81eb6c2f78602bdc;p=libs%2Fgl.git

diff --git a/source/framebuffer.cpp b/source/framebuffer.cpp
index 77ac21be..8e8be663 100644
--- a/source/framebuffer.cpp
+++ b/source/framebuffer.cpp
@@ -1,12 +1,7 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
-#include "extension.h"
-#include "ext_framebuffer_object.h"
+#include <msp/gl/extensions/arb_draw_buffers.h>
+#include <msp/gl/extensions/ext_framebuffer_blit.h>
+#include <msp/gl/extensions/ext_framebuffer_object.h>
+#include "error.h"
 #include "framebuffer.h"
 #include "misc.h"
 #include "renderbuffer.h"
@@ -17,12 +12,48 @@ 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_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)
 {
 	if(id)
-		throw InvalidParameterValue("System framebuffer must have id 0");
+		throw invalid_argument("System framebuffer must have id 0");
 
 	int viewport[4];
 	glGetIntegerv(GL_VIEWPORT, viewport);
@@ -35,15 +66,15 @@ Framebuffer::Framebuffer():
 	height(0),
 	dirty(0)
 {
-	static RequireExtension _ext("GL_EXT_framebuffer_object");
+	static Require _req(EXT_framebuffer_object);
 
-	glGenFramebuffersEXT(1, &id);
+	glGenFramebuffers(1, &id);
 }
 
 Framebuffer::~Framebuffer()
 {
 	if(id)
-		glDeleteFramebuffersEXT(1, &id);
+		glDeleteFramebuffers(1, &id);
 	if(current()==this)
 		unbind();
 }
@@ -52,29 +83,42 @@ void Framebuffer::update_attachment(unsigned mask) const
 {
 	if(current()==this)
 	{
-		GLenum color_buf = GL_NONE;
-		bool has_depth = false;
+		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))
 			{
-				if(attch.type==GL_RENDERBUFFER_EXT)
-					glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, attch.attachment, GL_RENDERBUFFER_EXT, attch.rbuf->get_id());
+				if(attch.type==GL_RENDERBUFFER)
+					glFramebufferRenderbuffer(GL_FRAMEBUFFER, attch.attachment, GL_RENDERBUFFER, attch.rbuf->get_id());
 				else if(attch.type==GL_TEXTURE_2D)
-					glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, attch.attachment, attch.type, attch.tex->get_id(), attch.level);
+				{
+					static_cast<Texture2D *>(attch.tex)->allocate(attch.level);
+					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
-					glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, attch.attachment, 0, 0);
+					glFramebufferRenderbuffer(GL_FRAMEBUFFER, attch.attachment, 0, 0);
 			}
 
 			if(attch.attachment>=COLOR_ATTACHMENT0 && attch.attachment<=COLOR_ATTACHMENT3)
-				color_buf = attch.attachment;
-			if(attch.attachment==DEPTH_ATTACHMENT)
-				has_depth = true;
+				color_bufs.push_back(attch.attachment);
 		}
 
-		glDrawBuffer(color_buf);
-		glDepthMask(has_depth);
+		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]);
+		}
 	}
 	else
 		dirty |= mask;
@@ -85,7 +129,7 @@ void Framebuffer::check_size()
 	for(vector<Attachment>::iterator i=attachments.begin(); i!=attachments.end(); ++i)
 		if(i->type)
 		{
-			if(i->type==GL_RENDERBUFFER_EXT)
+			if(i->type==GL_RENDERBUFFER)
 			{
 				width = i->rbuf->get_width();
 				height = i->rbuf->get_height();
@@ -96,16 +140,30 @@ void Framebuffer::check_size()
 				width = tex->get_width();
 				height = tex->get_height();
 			}
+			else if(i->type==GL_TEXTURE_CUBE_MAP)
+			{
+				width = static_cast<TextureCube *>(i->tex)->get_size();
+				height = width;
+			}
 			if(current()==this)
 				glViewport(0, 0, width, height);
 			break;
 		}
 }
 
+unsigned Framebuffer::get_attachment_index(FramebufferAttachment attch)
+{
+	for(unsigned i=0; i<attachments.size(); ++i)
+		if(attachments[i].attachment==attch)
+			return i;
+	attachments.push_back(Attachment(attch));
+	return attachments.size()-1;
+}
+
 void Framebuffer::attach(FramebufferAttachment attch, Renderbuffer &rbuf)
 {
 	if(!id)
-		throw InvalidState("Can't attach to system framebuffer");
+		throw invalid_operation("Framebuffer::attach");
 
 	unsigned i = get_attachment_index(attch);
 	attachments[i].set(rbuf);
@@ -113,13 +171,24 @@ void Framebuffer::attach(FramebufferAttachment attch, Renderbuffer &rbuf)
 	check_size();
 }
 
-void Framebuffer::attach(FramebufferAttachment attch, Texture2D &tex, int level)
+void Framebuffer::attach(FramebufferAttachment attch, Texture2D &tex, unsigned level)
+{
+	if(!id)
+		throw invalid_operation("Framebuffer::attach");
+
+	unsigned i = get_attachment_index(attch);
+	attachments[i].set(tex, 0, level);
+	update_attachment(1<<i);
+	check_size();
+}
+
+void Framebuffer::attach(FramebufferAttachment attch, TextureCube &tex, TextureCubeFace face, unsigned level)
 {
 	if(!id)
-		throw InvalidState("Can't attach to system framebuffer");
+		throw invalid_operation("Framebuffer::attach");
 
 	unsigned i = get_attachment_index(attch);
-	attachments[i].set(tex, level);
+	attachments[i].set(tex, face, level);
 	update_attachment(1<<i);
 	check_size();
 }
@@ -127,7 +196,7 @@ void Framebuffer::attach(FramebufferAttachment attch, Texture2D &tex, int level)
 void Framebuffer::detach(FramebufferAttachment attch)
 {
 	if(!id)
-		throw InvalidState("Can't detach from system framebuffer");
+		throw invalid_operation("Framebuffer::detach");
 
 	unsigned i = get_attachment_index(attch);
 	attachments[i].clear();
@@ -138,7 +207,14 @@ void Framebuffer::detach(FramebufferAttachment attch)
 FramebufferStatus Framebuffer::check_status() const
 {
 	Bind _bind(this, true);
-	return static_cast<FramebufferStatus>(glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT));
+	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::clear(BufferBits bits)
@@ -147,11 +223,44 @@ void Framebuffer::clear(BufferBits bits)
 	glClear(bits);
 }
 
+void Framebuffer::blit_from(const Framebuffer &other, int sx0, int sy0, int sx1, int sy1, int dx0, int dy0, int dx1, int dy1, BufferBits bits, bool filter)
+{
+	static Require _req(EXT_framebuffer_blit);
+
+	const Framebuffer *old = current();
+	if(set_current(this))
+	{
+		glBindFramebuffer(GL_DRAW_FRAMEBUFFER, id);
+		if(dirty)
+		{
+			update_attachment(dirty);
+			dirty = 0;
+		}
+	}
+	if(old!=&other)
+		glBindFramebuffer(GL_READ_FRAMEBUFFER, other.id);
+
+	glBlitFramebuffer(sx0, sy0, sx1, sy1, dx0, dy0, dx1, dy1, bits, (filter ? GL_LINEAR : GL_NEAREST));
+
+	set_current(old);
+	glBindFramebuffer(GL_FRAMEBUFFER, (old ? old->id : 0));
+}
+
+void Framebuffer::blit_from(const Framebuffer &other, int sx, int sy, unsigned wd, unsigned ht, int dx, int dy, BufferBits bits)
+{
+	blit_from(other, sx, sy, sx+wd, sy+ht, dx, dy, dx+wd, dy+ht, bits, false);
+}
+
+void Framebuffer::blit_from(const Framebuffer &other, BufferBits bits, bool filter)
+{
+	blit_from(other, 0, 0, other.width, other.height, 0, 0, width, height, bits, filter);
+}
+
 void Framebuffer::bind() const
 {
 	if(set_current(this))
 	{
-		glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, id);
+		glBindFramebuffer(GL_FRAMEBUFFER, id);
 		if(dirty)
 		{
 			update_attachment(dirty);
@@ -180,15 +289,6 @@ Framebuffer &Framebuffer::system()
 	return sys_framebuf;
 }
 
-unsigned Framebuffer::get_attachment_index(FramebufferAttachment attch)
-{
-	for(unsigned i=0; i<attachments.size(); ++i)
-		if(attachments[i].attachment==attch)
-			return i;
-	attachments.push_back(Attachment(attch));
-	return attachments.size()-1;
-}
-
 
 Framebuffer::Attachment::Attachment(FramebufferAttachment a):
 	attachment(a),
@@ -198,15 +298,16 @@ Framebuffer::Attachment::Attachment(FramebufferAttachment a):
 
 void Framebuffer::Attachment::set(Renderbuffer &r)
 {
-	type = GL_RENDERBUFFER_EXT;
+	type = GL_RENDERBUFFER;
 	rbuf = &r;
 	level = 0;
 }
 
-void Framebuffer::Attachment::set(Texture &t, int l)
+void Framebuffer::Attachment::set(Texture &t, GLenum f, unsigned l)
 {
 	type = t.get_target();
 	tex = &t;
+	cube_face = f;
 	level = l;
 }