/// <summary>
/// Initializes a new instance of the <see cref="GorgonPoint"/> class.
/// </summary>
/// <param name="gorgon2D">Gorgon interface that owns this renderable.</param>
/// <param name="name">The name of the point.</param>
internal GorgonPoint(Gorgon2D gorgon2D, string name)
: base(name)
{
CullingMode = CullingMode.Back;
Gorgon2D = gorgon2D;
_depthState = new GorgonRenderable.DepthStencilStates();
_blendState = new GorgonRenderable.BlendState();
_samplerState = new GorgonRenderable.TextureSamplerState();
_vertices = new []
{
new Gorgon2DVertex
{
Position = new Vector4(0, 0, 0, 1.0f)
},
new Gorgon2DVertex
{
Position = new Vector4(0, 0, 0, 1.0f)
},
new Gorgon2DVertex
{
Position = new Vector4(0, 0, 0, 1.0f)
},
new Gorgon2DVertex
{
Position = new Vector4(0, 0, 0, 1.0f)
}
};
}
/// <summary>
/// Initializes a new instance of the <see cref="GorgonDrawing"/> class.
/// </summary>
/// <param name="gorgon2D">The gorgon 2D interface that owns this object.</param>
internal GorgonDrawing(Gorgon2D gorgon2D)
{
_depthStencil = new GorgonRenderable.DepthStencilStates();
_sampler = new GorgonRenderable.TextureSamplerState();
_blend = new GorgonRenderable.BlendState();
// Default to modulated blending for drawing operations.
BlendingMode = BlendingMode.Modulate;
CullingMode = CullingMode.Back;
_rect = new GorgonRectangle(gorgon2D, "Gorgon2D.Rectangle", false)
{
Position = Vector2.Zero,
Size = Vector2.Zero
};
_point = new GorgonPoint(gorgon2D, "Gorgon2D.Point")
{
Position = Vector2.Zero,
Color = GorgonColor.White
};
_line = new GorgonLine(gorgon2D, "Gorgon2D.Line")
{
Color = GorgonColor.White,
StartPoint = Vector2.Zero,
EndPoint = Vector2.Zero
};
_ellipse = new GorgonEllipse(gorgon2D, "Gorgon2D.Ellipse")
{
Quality = 64,
Color = GorgonColor.White
};
_triangle = new GorgonTriangle(gorgon2D,
"Gorgon2D.Triangle")
{
IsFilled = false
};
_string = gorgon2D.Renderables.CreateText("Gorgon2D.String");
}
/// <summary>
/// Function to determine what state changes are proposed by the current renderable.
/// </summary>
/// <param name="renderable">The renderable to test.</param>
/// <returns>The states that require changes.</returns>
internal StateChange Compare(IRenderable renderable)
{
var result = StateChange.None;
GorgonRenderable.DepthStencilStates depthStencil = renderable.DepthStencil;
GorgonRenderable.BlendState blending = renderable.Blending;
GorgonRenderable.TextureSamplerState sampler = renderable.TextureSampler;
GorgonShaderView textureView = null;
var alphaTest = new Gorgon2DAlphaTest(Gorgon2D.IsAlphaTestEnabled, renderable.AlphaTestValues);
// Get the current texture view.
if (renderable.Texture != null)
{
textureView = renderable.Texture;
}
// Ensure that the stored resource is up to date. If it's been changed outside of the
// state management, then we can have issues (text does this).
if ((textureView != _resource) ||
(_resource != Gorgon2D.PixelShader.Resources[0]))
{
result |= StateChange.Texture;
}
if (Gorgon2D.IsBlendingEnabled == _blendStates.RenderTarget0.IsBlendingEnabled)
{
// If blending is enabled, then track the blending changes.
if (Gorgon2D.IsBlendingEnabled)
{
if (!blending.BlendFactor.Equals(ref _blendFactor))
{
result |= StateChange.BlendFactor;
}
if ((blending.SourceBlend != _blendStates.RenderTarget0.SourceBlend) ||
(blending.DestinationBlend != _blendStates.RenderTarget0.DestinationBlend) ||
(blending.AlphaOperation != _blendStates.RenderTarget0.AlphaOperation) ||
(blending.BlendOperation != _blendStates.RenderTarget0.BlendingOperation) ||
(blending.SourceAlphaBlend != _blendStates.RenderTarget0.SourceAlphaBlend) ||
(blending.DestinationAlphaBlend != _blendStates.RenderTarget0.DestinationAlphaBlend) ||
(blending.WriteMask != _blendStates.RenderTarget0.WriteMask))
{
result |= StateChange.BlendState;
}
}
}
else
{
result |= StateChange.BlendState;
}
if ((sampler.TextureFilter != _samplerState.TextureFilter) ||
(sampler.VerticalWrapping != _samplerState.VerticalAddressing) ||
(sampler.HorizontalWrapping != _samplerState.HorizontalAddressing) ||
(!sampler.BorderColor.Equals(ref _samplerState.BorderColor)))
{
result |= StateChange.Sampler;
}
if (((Gorgon2D.ClipRegion != null) != (_rasterStates.IsScissorTestingEnabled)) ||
(renderable.DepthStencil.DepthBias != _rasterStates.DepthBias) ||
(renderable.CullingMode != _rasterStates.CullingMode) ||
(Gorgon2D.IsMultisamplingEnabled != _rasterStates.IsMultisamplingEnabled))
{
result |= StateChange.Raster;
}
if (renderable.PrimitiveType != _graphics.Input.PrimitiveType)
{
result |= StateChange.PrimitiveType;
}
if (renderable.IndexBuffer != _graphics.Input.IndexBuffer)
{
result |= StateChange.IndexBuffer;
}
if (!renderable.VertexBufferBinding.Equals(ref _vertexBuffer))
{
result |= StateChange.VertexBuffer;
}
if (!Gorgon2DAlphaTest.Equals(ref _alphaTest, ref alphaTest))
{
result |= StateChange.AlphaTest;
}
if (depthStencil.StencilReference != _depthStencilReference)
{
result |= StateChange.DepthStencilReference;
}
if ((Gorgon2D.IsDepthBufferEnabled != _depthStencilState.IsDepthEnabled) ||
(Gorgon2D.IsStencilEnabled != _depthStencilState.IsStencilEnabled))
{
result |= StateChange.DepthStencil;
}
else
{
if ((Gorgon2D.IsDepthBufferEnabled) &&
(depthStencil.IsDepthWriteEnabled != _depthStencilState.IsDepthWriteEnabled) ||
(depthStencil.DepthComparison != _depthStencilState.DepthComparison))
{
result |= StateChange.DepthStencil;
}
if ((Gorgon2D.IsStencilEnabled) &&
((_depthStencilState.StencilReadMask != depthStencil.StencilReadMask) ||
(_depthStencilState.StencilWriteMask != depthStencil.StencilWriteMask) ||
(_depthStencilState.StencilFrontFace.ComparisonOperator != depthStencil.FrontFace.ComparisonOperator) ||
(_depthStencilState.StencilFrontFace.DepthFailOperation != depthStencil.FrontFace.DepthFailOperation) ||
(_depthStencilState.StencilFrontFace.FailOperation != depthStencil.FrontFace.FailOperation) ||
(_depthStencilState.StencilFrontFace.PassOperation != depthStencil.FrontFace.PassOperation) ||
(_depthStencilState.StencilBackFace.ComparisonOperator != depthStencil.BackFace.ComparisonOperator) ||
(_depthStencilState.StencilBackFace.DepthFailOperation != depthStencil.BackFace.DepthFailOperation) ||
(_depthStencilState.StencilBackFace.FailOperation != depthStencil.BackFace.FailOperation) ||
(_depthStencilState.StencilBackFace.PassOperation != depthStencil.BackFace.PassOperation)))
{
result |= StateChange.DepthStencil;
}
}
return(result);
}
/// <summary>
/// Function to apply any state changes.
/// </summary>
/// <param name="renderable">Renderable object to retrieve states from.</param>
/// <param name="state">States that need updating.</param>
internal void UpdateState(IRenderable renderable, StateChange state)
{
GorgonRenderable.DepthStencilStates depthStencil = renderable.DepthStencil;
GorgonRenderable.BlendState blending = renderable.Blending;
GorgonRenderable.TextureSamplerState sampler = renderable.TextureSampler;
if ((state & StateChange.Texture) == StateChange.Texture)
{
_resource = _graphics.Shaders.PixelShader.Resources[0] = renderable.Texture;
// If we have a texture change, and we have the default diffuse shader loaded, then switch to the textured shader, otherwise
// switch to the diffuse shader.
Gorgon2D.PixelShader.TextureSwitch(renderable.Texture);
}
if ((state & StateChange.BlendFactor) == StateChange.BlendFactor)
{
_blendFactor = blending.BlendFactor;
_graphics.Output.BlendingState.BlendFactor = blending.BlendFactor;
}
if ((state & StateChange.BlendState) == StateChange.BlendState)
{
_blendStates.RenderTarget0.IsBlendingEnabled = Gorgon2D.IsBlendingEnabled;
_blendStates.RenderTarget0.AlphaOperation = blending.AlphaOperation;
_blendStates.RenderTarget0.BlendingOperation = blending.BlendOperation;
_blendStates.RenderTarget0.DestinationAlphaBlend = blending.DestinationAlphaBlend;
_blendStates.RenderTarget0.DestinationBlend = blending.DestinationBlend;
_blendStates.RenderTarget0.SourceAlphaBlend = blending.SourceAlphaBlend;
_blendStates.RenderTarget0.SourceBlend = blending.SourceBlend;
_blendStates.RenderTarget0.WriteMask = blending.WriteMask;
_graphics.Output.BlendingState.States = _blendStates;
}
if ((state & StateChange.Sampler) == StateChange.Sampler)
{
_samplerState.HorizontalAddressing = sampler.HorizontalWrapping;
_samplerState.VerticalAddressing = sampler.VerticalWrapping;
_samplerState.BorderColor = sampler.BorderColor;
_samplerState.TextureFilter = sampler.TextureFilter;
_graphics.Shaders.PixelShader.TextureSamplers[0] = _samplerState;
}
if ((state & StateChange.Raster) == StateChange.Raster)
{
_rasterStates.IsScissorTestingEnabled = Gorgon2D.ClipRegion != null;
_rasterStates.CullingMode = renderable.CullingMode;
_rasterStates.IsMultisamplingEnabled = Gorgon2D.IsMultisamplingEnabled;
_rasterStates.DepthBias = depthStencil.DepthBias;
_graphics.Rasterizer.States = _rasterStates;
}
if ((state & StateChange.PrimitiveType) == StateChange.PrimitiveType)
{
_primitiveType = _graphics.Input.PrimitiveType = renderable.PrimitiveType;
}
if ((state & StateChange.IndexBuffer) == StateChange.IndexBuffer)
{
_indexBuffer = _graphics.Input.IndexBuffer = renderable.IndexBuffer;
}
if ((state & StateChange.VertexBuffer) == StateChange.VertexBuffer)
{
_vertexBuffer = _graphics.Input.VertexBuffers[0] = renderable.VertexBufferBinding;
}
if ((state & StateChange.AlphaTest) == StateChange.AlphaTest)
{
_alphaTest = new Gorgon2DAlphaTest(Gorgon2D.IsAlphaTestEnabled, renderable.AlphaTestValues);
Gorgon2D.PixelShader.AlphaTestValuesBuffer.Update(ref _alphaTest);
}
if ((state & StateChange.DepthStencilReference) == StateChange.DepthStencilReference)
{
_depthStencilReference = _graphics.Output.DepthStencilState.StencilReference = depthStencil.StencilReference;
}
if ((state & StateChange.DepthStencil) != StateChange.DepthStencil)
{
return;
}
_depthStencilState.IsDepthEnabled = Gorgon2D.IsDepthBufferEnabled;
_depthStencilState.IsDepthWriteEnabled = depthStencil.IsDepthWriteEnabled;
_depthStencilState.DepthComparison = depthStencil.DepthComparison;
_depthStencilState.StencilReadMask = depthStencil.StencilReadMask;
_depthStencilState.StencilWriteMask = depthStencil.StencilWriteMask;
_depthStencilState.IsStencilEnabled = Gorgon2D.IsStencilEnabled;
_depthStencilState.StencilFrontFace.ComparisonOperator = depthStencil.FrontFace.ComparisonOperator;
_depthStencilState.StencilFrontFace.DepthFailOperation = depthStencil.FrontFace.DepthFailOperation;
_depthStencilState.StencilFrontFace.FailOperation = depthStencil.FrontFace.FailOperation;
_depthStencilState.StencilFrontFace.PassOperation = depthStencil.FrontFace.PassOperation;
_depthStencilState.StencilBackFace.ComparisonOperator = depthStencil.BackFace.ComparisonOperator;
_depthStencilState.StencilBackFace.DepthFailOperation = depthStencil.BackFace.DepthFailOperation;
_depthStencilState.StencilBackFace.FailOperation = depthStencil.BackFace.FailOperation;
_depthStencilState.StencilBackFace.PassOperation = depthStencil.BackFace.PassOperation;
_graphics.Output.DepthStencilState.States = _depthStencilState;
}