public void Attach(Shader shader)
{
if (!Bind())
return;
GL.BindBuffer(BufferTarget.ArrayBuffer, VertexDataBufferObject);
shader.Use();
int off = 0;
for (int i = 0; i < declarations.Count; i++)
{
int location = GL.GetAttribLocation(shader.Handle, declarations[i].name);
if (location != -1)
{
GL.VertexAttribPointer(location, declarations[i].elements, VertexAttribPointerType.Float, false, stride * sizeof(float), off);
GL.EnableVertexAttribArray(location);
}
off += declarations[i].elements * sizeof(float);
}
GL.BindBuffer(BufferTarget.ElementArrayBuffer, IndexDataBufferObject);
}
public void BindShader(Shader shader, string positionAttrib, string colorAttrib, string texcoordAttrib, string projectionUniform, string viewUniform)
{
vbuffer.ClearAttributeDeclarations();
vbuffer.DeclareNextAttribute(positionAttrib, 2);
vbuffer.DeclareNextAttribute(colorAttrib, 4);
vbuffer.DeclareNextAttribute(texcoordAttrib, 2);
vbuffer.Attach(shader);
proj_uniform_loc = GL.GetUniformLocation(shader.Program, projectionUniform);
view_uniform_loc = GL.GetUniformLocation(shader.Program, viewUniform);
shader.Use();
current = shader;
}
public void End()
{
int pr;
GL.GetInteger(GetPName.CurrentProgram,out pr);
if(current == null)
{
current = defaultShader;
current.Use();
}
if (current.Program != pr)
current.Use();
current.SetUniform(proj_uniform_loc, ref proj);
current.SetUniform(view_uniform_loc, ref trans);
// nothing to do
if (_batchItemList.Count == 0)
return;
vbuffer.Bind();
vbuffer.UpdateVertexBuffer();
vbuffer.UpdateIndexBuffer();
int texID = -1;
BeginMode mode = BeginMode.Triangles;
float lineWidth;
float pointSize;
GL.GetFloat(GetPName.LineWidth, out lineWidth);
GL.GetFloat(GetPName.PointSize, out pointSize);
int offset = 0, count = 0;
foreach (BatchItem item in _batchItemList)
{
if (item.texture != texID || item.mode != mode || lineWidth != item.lineWidth || pointSize != item.pointSize)
{
FlushBuffer(mode, offset, count);
offset += count;
count = 0;
texID = item.texture;
mode = item.mode;
lineWidth = item.lineWidth;
pointSize = item.pointSize;
GL.BindTexture(TextureTarget.Texture2D, texID);
GL.LineWidth(item.lineWidth);
GL.PointSize(item.pointSize);
}
count += item.count;
_freeBatchItemQueue.Enqueue(item);
}
// flush the remaining vertexArray data
FlushBuffer(mode, offset, count);
vbuffer.ClearBuffer();
_batchItemList.Clear();
}
public void BindShader(Shader shader, string positionAttrib, string colorAttrib, string texcoordAttrib)
{
vbuffer.ClearAttributeDeclarations();
vbuffer.DeclareNextAttribute(positionAttrib, 2);
vbuffer.DeclareNextAttribute(colorAttrib, 4);
vbuffer.DeclareNextAttribute(texcoordAttrib, 2);
vbuffer.Attach(shader);
shader.Use();
}