X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fmesh.cpp;h=d474a27f116cc0c3e7175f7a64488120d4e83805;hp=f23c56c8b80c54e30b645984cc3d0b8d7747f7e5;hb=c233a90fd05f1f5424d7fca94bb6b999f3061271;hpb=5c51ba1057b222ab44eca253828d58e107e80df0

diff --git a/source/mesh.cpp b/source/mesh.cpp
index f23c56c8..d474a27f 100644
--- a/source/mesh.cpp
+++ b/source/mesh.cpp
@@ -1,3 +1,5 @@
+#include <msp/gl/extensions/arb_vertex_array_object.h>
+#include <msp/gl/extensions/arb_vertex_shader.h>
 #include "buffer.h"
 #include "mesh.h"
 #include "renderer.h"
@@ -11,7 +13,9 @@ Mesh::Mesh():
 	vertices(VERTEX3),
 	vbuf(0),
 	ibuf(0),
+	vao_id(0),
 	defer_buffers(true),
+	dirty(0),
 	winding(0)
 { }
 
@@ -19,7 +23,9 @@ Mesh::Mesh(const VertexFormat &f):
 	vertices(f),
 	vbuf(0),
 	ibuf(0),
+	vao_id(0),
 	defer_buffers(true),
+	dirty(2),
 	winding(0)
 { }
 
@@ -27,6 +33,8 @@ Mesh::~Mesh()
 {
 	delete vbuf;
 	delete ibuf;
+	if(vao_id)
+		glDeleteVertexArrays(1, &vao_id);
 }
 
 void Mesh::clear()
@@ -60,6 +68,51 @@ void Mesh::create_buffers()
 
 	if(!ibuf)
 		ibuf = new Buffer(ELEMENT_ARRAY_BUFFER);
+
+	if(ARB_vertex_array_object && !vao_id)
+		glGenVertexArrays(1, &vao_id);
+}
+
+void Mesh::refresh() const
+{
+	vertices.refresh();
+	if(dirty)
+	{
+		if(dirty&1)
+		{
+			unbind();
+			for(list<Batch>::const_iterator i=batches.begin(); i!=batches.end(); ++i)
+				i->refresh();
+		}
+
+		if(dirty&2)
+		{
+			glBindVertexArray(vao_id);
+			BufferAlias<ARRAY_BUFFER> vbuf_alias(*vbuf);
+			Bind bind_vbuf(vbuf_alias);
+
+			const VertexFormat &fmt = vertices.get_format();
+			unsigned stride = get_stride(fmt)*sizeof(float);
+			float *ptr = 0;
+			for(const unsigned char *c=fmt.begin(); c!=fmt.end(); ++c)
+			{
+				unsigned t = get_component_type(*c);
+				if(t>=get_component_type(ATTRIB1))
+					t -= get_component_type(ATTRIB1);
+				unsigned sz = get_component_size(*c);
+				if(*c==COLOR4_UBYTE)
+					glVertexAttribPointer(t, 4, GL_UNSIGNED_BYTE, true, stride, ptr);
+				else
+					glVertexAttribPointer(t, sz, GL_FLOAT, false, stride, ptr);
+				glEnableVertexAttribArray(t);
+				ptr += sz;
+			}
+			glBindBuffer(ELEMENT_ARRAY_BUFFER, ibuf->get_id());
+			glBindVertexArray(0);
+		}
+
+		dirty = 0;
+	}
 }
 
 unsigned Mesh::get_n_vertices() const
@@ -77,6 +130,7 @@ void Mesh::add_batch(const Batch &b)
 	if(defer_buffers)
 		create_buffers();
 
+	dirty |= 1;
 	if(!batches.empty() && batches.back().can_append(b.get_type()))
 		batches.back().append(b);
 	else
@@ -95,16 +149,21 @@ void Mesh::set_winding(const WindingTest *w)
 
 void Mesh::draw() const
 {
-	vertices.apply();
+	refresh();
+
+	if(!current())
+	{
+		vertices.apply();
+		if(ibuf)
+			ibuf->bind_to(ELEMENT_ARRAY_BUFFER);
+	}
 
-	if(ibuf)
-		ibuf->bind_to(ELEMENT_ARRAY_BUFFER);
 	Bind bind_winding(winding);
 
 	for(list<Batch>::const_iterator i=batches.begin(); i!=batches.end(); ++i)
 		i->draw();
 
-	if(ibuf)
+	if(!current() && ibuf)
 		Buffer::unbind_from(ELEMENT_ARRAY_BUFFER);
 }
 
@@ -118,6 +177,30 @@ void Mesh::draw(Renderer &renderer) const
 		renderer.draw(*i);
 }
 
+void Mesh::bind() const
+{
+	/* If VAOs are not supported, vao_id is zero and set_current won't get
+	called.  Thus unbind won't try to call a null function either. */
+	if(!vao_id)
+		unbind();
+	else
+	{
+		if(Buffer::current(ELEMENT_ARRAY_BUFFER))
+		{
+			unbind();
+			Buffer::unbind_from(ELEMENT_ARRAY_BUFFER);
+		}
+		if(set_current(this))
+			glBindVertexArray(vao_id);
+	}
+}
+
+void Mesh::unbind()
+{
+	if(set_current(0))
+		glBindVertexArray(0);
+}
+
 
 Mesh::Loader::Loader(Mesh &m):
 	DataFile::ObjectLoader<Mesh>(m)
@@ -136,6 +219,7 @@ void Mesh::Loader::vertices(const vector<VertexComponent> &c)
 	for(vector<VertexComponent>::const_iterator i=c.begin(); i!=c.end(); ++i)
 		fmt = (fmt, *i);
 	obj.vertices.reset(fmt);
+	obj.dirty |= 2;
 	load_sub(obj.vertices);
 }