/// <summary>
/// Set the vertex arrays state for the shader program.
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> on which the shader program is bound.
/// </param>
/// <param name="shaderProgram">
/// A <see cref="ShaderProgram"/> on which the vertex arrays shall be bound.
/// </param>
private void SetVertexArrayState(GraphicsContext ctx, ShaderProgram shaderProgram)
{
CheckThisExistence(ctx);
ctx.Bind(this, true);
if (shaderProgram != null)
{
ICollection <string> activeAttributes = shaderProgram.ActiveAttributes;
// Note: when the GL_ARB_vertex_array_object is supported, there's no need to define vertex attributes each time
if (ctx.Extensions.VertexArrayObject_ARB && !_VertexArrayDirty)
{
// CheckVertexAttributes(ctx, shaderProgram);
return;
}
uint attributesSet = 0;
// Set vertex array state
foreach (string attributeName in activeAttributes)
{
IVertexArray shaderVertexArray = GetVertexArray(attributeName, shaderProgram);
if (shaderVertexArray == null)
{
continue;
}
// Set array attribute
shaderVertexArray.SetVertexAttribute(ctx, shaderProgram, attributeName);
attributesSet++;
}
if (attributesSet == 0)
{
throw new InvalidOperationException("no attribute is set");
}
_VertexArrayCount = attributesSet;
}
else
{
IVertexArray attributeArray;
// No shader program: using fixed pipeline program. ATM enable all attributes having a semantic
if ((attributeArray = GetVertexArray(VertexArraySemantic.Position)) == null)
{
throw new InvalidOperationException("no position semantic array defined");
}
attributeArray.SetVertexAttribute(ctx, null, VertexArraySemantic.Position);
// Optional attributes
if ((attributeArray = GetVertexArray(VertexArraySemantic.Color)) != null)
{
attributeArray.SetVertexAttribute(ctx, null, VertexArraySemantic.Color);
}
if ((attributeArray = GetVertexArray(VertexArraySemantic.Normal)) != null)
{
attributeArray.SetVertexAttribute(ctx, null, VertexArraySemantic.Normal);
}
if ((attributeArray = GetVertexArray(VertexArraySemantic.TexCoord)) != null)
{
attributeArray.SetVertexAttribute(ctx, null, VertexArraySemantic.TexCoord);
}
}
// Next time do not set inputs if GL_ARB_vertex_array_object is supported
_VertexArrayDirty = false;
}
/// <summary>
/// Set the vertex arrays state for the shader program.
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> on which the shader program is bound.
/// </param>
/// <param name="shaderProgram">
/// A <see cref="ShaderProgram"/> on which the vertex arrays shall be bound.
/// </param>
private void SetVertexArrayState(GraphicsContext ctx, ShaderProgram shaderProgram)
{
CheckThisExistence(ctx);
// Set vertex array state all at once...
ctx.Bind(this, true);
if (shaderProgram != null)
{
ICollection <string> activeAttributes = shaderProgram.ActiveAttributes;
uint attributesSet = 0;
// Set vertex array state
foreach (string attributeName in activeAttributes)
{
IVertexArray shaderVertexArray = GetVertexArray(attributeName, shaderProgram);
if (shaderVertexArray == null)
{
continue;
}
ShaderProgram.AttributeBinding attributeBinding = shaderProgram.GetActiveAttribute(attributeName);
IVertexArray currentVertexArray = _VertexArrayState[attributeBinding.Location];
//if (ReferenceEquals(shaderVertexArray, currentVertexArray) == false) {
shaderVertexArray.SetVertexAttribute(ctx, attributeBinding, attributeName);
_VertexArrayState[attributeBinding.Location] = shaderVertexArray;
//}
attributesSet++;
}
if (attributesSet == 0)
{
throw new InvalidOperationException("no attribute is set");
}
}
else
{
IVertexArray attributeArray;
// No shader program: using fixed pipeline program. ATM enable all attributes having a semantic
if ((attributeArray = GetVertexArray(VertexArraySemantic.Position)) == null)
{
throw new InvalidOperationException("no position semantic array defined");
}
attributeArray.SetVertexAttribute(ctx, null, VertexArraySemantic.Position);
// Optional attributes
if ((attributeArray = GetVertexArray(VertexArraySemantic.Color)) != null)
{
attributeArray.SetVertexAttribute(ctx, null, VertexArraySemantic.Color);
}
if ((attributeArray = GetVertexArray(VertexArraySemantic.Normal)) != null)
{
attributeArray.SetVertexAttribute(ctx, null, VertexArraySemantic.Normal);
}
if ((attributeArray = GetVertexArray(VertexArraySemantic.TexCoord)) != null)
{
attributeArray.SetVertexAttribute(ctx, null, VertexArraySemantic.TexCoord);
}
}
}
/// <summary>
/// Set the vertex arrays state for the shader program.
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> on which the shader program is bound.
/// </param>
/// <param name="shaderProgram">
/// A <see cref="ShaderProgram"/> on which the vertex arrays shall be bound.
/// </param>
protected void SetVertexArrayState(GraphicsContext ctx, ShaderProgram shaderProgram)
{
if (Exists(ctx) == false)
{
throw new InvalidOperationException("not existing");
}
if (ctx.Caps.GlExtensions.VertexArrayObject_ARB)
{
// Bind this vertex array
Gl.BindVertexArray(ObjectName);
// Short path?
if (!_VertexArrayDirty)
{
// CheckVertexAttributes(ctx, shaderProgram);
return;
}
}
if (shaderProgram != null)
{
uint attributesSet = 0;
// Set vertex array state
foreach (string attributeName in shaderProgram.ActiveAttributes)
{
IVertexArray shaderVertexArray = GetVertexArray(attributeName, shaderProgram);
if (shaderVertexArray == null)
{
continue;
}
// Set array attribute
shaderVertexArray.SetVertexAttribute(ctx, shaderProgram, attributeName); attributesSet++;
}
if (attributesSet == 0)
{
throw new InvalidOperationException("no attribute is set");
}
}
else
{
IVertexArray attributeArray;
// No shader program: using fixed pipeline program. ATM enable all attributes having a semantic
if ((attributeArray = GetVertexArray(VertexArraySemantic.Position)) == null)
{
throw new InvalidOperationException("no position semantic array defined");
}
attributeArray.SetVertexAttribute(ctx, null, VertexArraySemantic.Position);
// Optional attributes
if ((attributeArray = GetVertexArray(VertexArraySemantic.Color)) != null)
{
attributeArray.SetVertexAttribute(ctx, null, VertexArraySemantic.Color);
}
if ((attributeArray = GetVertexArray(VertexArraySemantic.Normal)) != null)
{
attributeArray.SetVertexAttribute(ctx, null, VertexArraySemantic.Normal);
}
if ((attributeArray = GetVertexArray(VertexArraySemantic.TexCoord)) != null)
{
attributeArray.SetVertexAttribute(ctx, null, VertexArraySemantic.TexCoord);
}
}
// Next time do not set inputs if GL_ARB_vertex_array_object is supported
_VertexArrayDirty = false;
}
