X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fmesh.cpp;h=150822ce85e1771a3826332cb19c12922c15a044;hb=910b5be9d486e36fbee15fbd89030202949f73b0;hp=f23c56c8b80c54e30b645984cc3d0b8d7747f7e5;hpb=cfd7b5bc0c69d0b8cc7c8b3ec81a1a9462d04abb;p=libs%2Fgl.git

diff --git a/source/mesh.cpp b/source/mesh.cpp
index f23c56c8..150822ce 100644
--- a/source/mesh.cpp
+++ b/source/mesh.cpp
@@ -1,4 +1,7 @@
+#include <msp/gl/extensions/arb_vertex_array_object.h>
+#include <msp/gl/extensions/arb_vertex_shader.h>
 #include "buffer.h"
+#include "error.h"
 #include "mesh.h"
 #include "renderer.h"
 
@@ -11,7 +14,9 @@ Mesh::Mesh():
 	vertices(VERTEX3),
 	vbuf(0),
 	ibuf(0),
+	vao_id(0),
 	defer_buffers(true),
+	dirty(true),
 	winding(0)
 { }
 
@@ -19,7 +24,9 @@ Mesh::Mesh(const VertexFormat &f):
 	vertices(f),
 	vbuf(0),
 	ibuf(0),
+	vao_id(0),
 	defer_buffers(true),
+	dirty(true),
 	winding(0)
 { }
 
@@ -27,6 +34,8 @@ Mesh::~Mesh()
 {
 	delete vbuf;
 	delete ibuf;
+	if(vao_id)
+		glDeleteVertexArrays(1, &vao_id);
 }
 
 void Mesh::clear()
@@ -60,6 +69,34 @@ 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::setup_vao() const
+{
+	Bind bind_vbuf(vbuf, ARRAY_BUFFER);
+
+	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());
+
+	dirty = false;
 }
 
 unsigned Mesh::get_n_vertices() const
@@ -95,22 +132,22 @@ void Mesh::set_winding(const WindingTest *w)
 
 void Mesh::draw() const
 {
-	vertices.apply();
+	const Mesh *cur = current();
+	if(cur && cur!=this)
+		throw invalid_operation("Mesh::draw");
 
-	if(ibuf)
-		ibuf->bind_to(ELEMENT_ARRAY_BUFFER);
+	if(!current())
+		vertices.apply();
+	Bind bind_ibuf(ibuf, ELEMENT_ARRAY_BUFFER);
 	Bind bind_winding(winding);
 
 	for(list<Batch>::const_iterator i=batches.begin(); i!=batches.end(); ++i)
 		i->draw();
-
-	if(ibuf)
-		Buffer::unbind_from(ELEMENT_ARRAY_BUFFER);
 }
 
 void Mesh::draw(Renderer &renderer) const
 {
-	vertices.apply();
+	renderer.set_mesh(this);
 	renderer.set_element_buffer(ibuf);
 	renderer.set_winding_test(winding);
 
@@ -118,6 +155,30 @@ 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();
+		vertices.apply();
+	}
+	else if(set_current(this))
+	{
+		glBindVertexArray(vao_id);
+		vertices.refresh();
+		if(dirty)
+			setup_vao();
+	}
+}
+
+void Mesh::unbind()
+{
+	if(set_current(0))
+		glBindVertexArray(0);
+}
+
 
 Mesh::Loader::Loader(Mesh &m):
 	DataFile::ObjectLoader<Mesh>(m)
@@ -136,6 +197,7 @@ 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 = true;
 	load_sub(obj.vertices);
 }