internal void Initialize()
{
PlatformInitialize();
// Clear the texture and sampler collections forcing
// the state to be reapplied.
VertexTextures.Clear();
VertexSamplerStates.Clear();
Textures.Clear();
SamplerStates.Clear();
// Clear constant buffers
_vertexConstantBuffers.Clear();
_pixelConstantBuffers.Clear();
// Force set the buffers and shaders on next ApplyState() call
_vertexBuffers = new VertexBufferBindings(_maxVertexBufferSlots);
// _vertexBuffersDirty = true;
_indexBufferDirty = true;
_vertexShaderDirty = true;
_pixelShaderDirty = true;
// Set the default scissor rect.
_scissorRectangleDirty = true;
ScissorRectangle = _viewport.Bounds;
// Set the default render target.
ApplyRenderTargets(null);
}
/// <summary>
/// Gets or create the DirectX input layout for the specified vertex buffers.
/// </summary>
/// <param name="vertexBuffers">The vertex buffers.</param>
/// <returns>The DirectX input layout.</returns>
public InputLayout GetOrCreate(VertexBufferBindings vertexBuffers)
{
InputLayout inputLayout;
if (_cache.TryGetValue(vertexBuffers, out inputLayout))
return inputLayout;
var vertexInputLayout = vertexBuffers.ToImmutable();
var inputElements = vertexInputLayout.GetInputElements();
try
{
inputLayout = new InputLayout(_graphicsDevice._d3dDevice, _shaderByteCode, inputElements);
}
catch (SharpDXException ex)
{
if (ex.Descriptor != Result.InvalidArg)
throw;
// If InputLayout ctor fails with InvalidArg then it's most likely because the
// vertex declaration doesn't match the vertex shader.
// Shader probably used the semantic "SV_Position" in the vertex shader input.
// Background information:
// "SV_Position" is a "system-value semantic" which is interpreted by the
// rasterizer stage. This means it needs to be used in the vertex shader output
// or the pixel shader input. (See
// https://msdn.microsoft.com/en-us/library/windows/desktop/bb509647.aspx)
//
// However, some effects (notably the original XNA stock effects) use
// "SV_Position" for the vertex shader input. This is technically allowed, but
// rather uncommon and causes problems:
// - XNA/MonoGame only has VertexElementUsage.Position, so there is no way to
// distinguish between "POSITION" and "SV_Position".
// - "SV_Position" cannot be used with any index other than 0, i.e. the DirectX
// FX compiler does not accept "SV_Position1", "SV_Position2", ...
// This is a problem when using multiple vertex streams, e.g. for blend shape
// animations. It makes it impossible to correctly match the vertex
// declaration with the vertex shader signature.
//
// Conclusion:
// - MonoGame needs to translate VertexElementUsage.Position to "POSITION".
// - MonoGame effects should always use "POSITION" for vertex shader inputs.
// Here is a workaround ("hack") for old vertex shaders which haven't been
// updated: Rename "POSITION0" to "SV_Position" and try again.
bool retry = false;
for (int i = 0; i < inputElements.Length; i++)
{
if (inputElements[i].SemanticIndex == 0 && inputElements[i].SemanticName.Equals("POSITION", StringComparison.OrdinalIgnoreCase))
{
inputElements[i].SemanticName = "SV_Position";
retry = true;
break;
}
}
if (!retry)
throw new InvalidOperationException(GetInvalidArgMessage(inputElements), ex);
try
{
inputLayout = new InputLayout(_graphicsDevice._d3dDevice, _shaderByteCode, inputElements);
// Workaround succeeded? This means that there is a vertex shader that needs
// to be updated.
#if DEBUG
if (_printWarning)
{
Debug.WriteLine(
"Warning: Vertex shader uses semantic 'SV_Position' for input register. " +
"Please update the shader and use the semantic 'POSITION0' instead. The " +
"semantic 'SV_Position' should only be used for the vertex shader output or " +
"pixel shader input!");
_printWarning = false;
}
#endif
}
catch (SharpDXException)
{
// Workaround failed.
throw new InvalidOperationException(GetInvalidArgMessage(inputElements), ex);
}
}
_cache.Add(vertexInputLayout, inputLayout);
return inputLayout;
}
/// <summary>
/// Gets or create the DirectX input layout for the specified vertex buffers.
/// </summary>
/// <param name="vertexBuffers">The vertex buffers.</param>
/// <returns>The DirectX input layout.</returns>
public InputLayout GetOrCreate(VertexBufferBindings vertexBuffers)
{
InputLayout inputLayout;
if (_cache.TryGetValue(vertexBuffers, out inputLayout))
{
return(inputLayout);
}
var vertexInputLayout = vertexBuffers.ToImmutable();
var inputElements = vertexInputLayout.GetInputElements();
try
{
inputLayout = new InputLayout(_graphicsDevice._d3dDevice, _shaderByteCode, inputElements);
}
catch (SharpDXException ex)
{
if (ex.Descriptor != Result.InvalidArg)
{
throw;
}
// If InputLayout ctor fails with InvalidArg then it's most likely because the
// vertex declaration doesn't match the vertex shader.
// Shader probably used the semantic "SV_Position" in the vertex shader input.
// Background information:
// "SV_Position" is a "system-value semantic" which is interpreted by the
// rasterizer stage. This means it needs to be used in the vertex shader output
// or the pixel shader input. (See
// https://msdn.microsoft.com/en-us/library/windows/desktop/bb509647.aspx)
//
// However, some effects (notably the original XNA stock effects) use
// "SV_Position" for the vertex shader input. This is technically allowed, but
// rather uncommon and causes problems:
// - XNA/MonoGame only has VertexElementUsage.Position, so there is no way to
// distinguish between "POSITION" and "SV_Position".
// - "SV_Position" cannot be used with any index other than 0, i.e. the DirectX
// FX compiler does not accept "SV_Position1", "SV_Position2", ...
// This is a problem when using multiple vertex streams, e.g. for blend shape
// animations. It makes it impossible to correctly match the vertex
// declaration with the vertex shader signature.
//
// Conclusion:
// - MonoGame needs to translate VertexElementUsage.Position to "POSITION".
// - MonoGame effects should always use "POSITION" for vertex shader inputs.
// Here is a workaround ("hack") for old vertex shaders which haven't been
// updated: Rename "POSITION0" to "SV_Position" and try again.
bool retry = false;
for (int i = 0; i < inputElements.Length; i++)
{
if (inputElements[i].SemanticIndex == 0 && inputElements[i].SemanticName.Equals("POSITION", StringComparison.OrdinalIgnoreCase))
{
inputElements[i].SemanticName = "SV_Position";
retry = true;
break;
}
}
if (!retry)
{
throw new InvalidOperationException(GetInvalidArgMessage(inputElements), ex);
}
try
{
inputLayout = new InputLayout(_graphicsDevice._d3dDevice, _shaderByteCode, inputElements);
// Workaround succeeded? This means that there is a vertex shader that needs
// to be updated.
#if DEBUG
if (_printWarning)
{
Debug.WriteLine(
"Warning: Vertex shader uses semantic 'SV_Position' for input register. " +
"Please update the shader and use the semantic 'POSITION0' instead. The " +
"semantic 'SV_Position' should only be used for the vertex shader output or " +
"pixel shader input!");
_printWarning = false;
}
#endif
}
catch (SharpDXException)
{
// Workaround failed.
throw new InvalidOperationException(GetInvalidArgMessage(inputElements), ex);
}
}
_cache.Add(vertexInputLayout, inputLayout);
return(inputLayout);
}