private unsafe void CreateDeviceObjects()
{
IO io = ImGui.GetIO();
// Build texture atlas
FontTextureData texData = io.FontAtlas.GetTexDataAsAlpha8();
// Create OpenGL texture
s_fontTexture = GL.GenTexture();
GL.BindTexture(TextureTarget.Texture2D, s_fontTexture);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)All.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)All.Linear);
GL.TexImage2D(
TextureTarget.Texture2D,
0,
PixelInternalFormat.Alpha,
texData.Width,
texData.Height,
0,
PixelFormat.Alpha,
PixelType.UnsignedByte,
new IntPtr(texData.Pixels));
// Store the texture identifier in the ImFontAtlas substructure.
io.FontAtlas.SetTexID(s_fontTexture);
// Cleanup (don't clear the input data if you want to append new fonts later)
//io.Fonts->ClearInputData();
io.FontAtlas.ClearTexData();
GL.BindTexture(TextureTarget.Texture2D, 0);
}
/// <summary>
/// Recreates the device texture used to render text.
/// </summary>
public unsafe void RecreateFontDeviceTexture(GraphicsDevice gd)
{
IO io = ImGui.GetIO();
// Build
FontTextureData textureData = io.FontAtlas.GetTexDataAsRGBA32();
// Store our identifier
io.FontAtlas.SetTexID(_fontAtlasID);
_fontTexture = gd.ResourceFactory.CreateTexture(TextureDescription.Texture2D(
(uint)textureData.Width,
(uint)textureData.Height,
1,
1,
PixelFormat.R8_G8_B8_A8_UNorm,
TextureUsage.Sampled));
_fontTexture.Name = "ImGui.NET Font Texture";
gd.UpdateTexture(
_fontTexture,
(IntPtr)textureData.Pixels,
(uint)(textureData.BytesPerPixel * textureData.Width * textureData.Height),
0,
0,
0,
(uint)textureData.Width,
(uint)textureData.Height,
1,
0,
0);
_fontTextureView = gd.ResourceFactory.CreateTextureView(_fontTexture);
io.FontAtlas.ClearTexData();
}
/// <summary>
/// 保存字符集的图片到左面
/// </summary>
public unsafe void SaveFontText()
{
IO io = ImGui.GetIO();
FontTextureData textureData = io.FontAtlas.GetTexDataAsRGBA32();
Rgba32[] pixelData = new Rgba32[textureData.Width * textureData.Height];
var data = textureData.Pixels;
var datalenfth = textureData.BytesPerPixel;
int offset = 0;
for (int y = 0; y < textureData.Height; y++)
{
for (int x = 0; x < textureData.Width; x++)
{
int index = (int)(y * textureData.Width + x);
//连续读取指定长度的
pixelData[index] = new Rgba32(data[offset], data[offset++], data[offset++], data[offset++]);
}
}
//textureData.
var image = SixLabors.ImageSharp.Image.LoadPixelData <Rgba32>(pixelData, textureData.Width, textureData.Height);
var path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "123.jpg");
image.Save(path);
//释放相关变量
io.FontAtlas.ClearTexData();
image.Dispose();
}
private unsafe void CreateDeviceObjects()
{
IO io = ImGui.GetIO();
// Build texture atlas
FontTextureData texData = io.FontAtlas.GetTexDataAsRGBA32();
// Create DirectX Texture
fontTexture = new Texture2D(Device, new Texture2DDescription()
{
Width = texData.Width,
Height = texData.Height,
MipLevels = 1,
ArraySize = 1,
Format = SharpDX.DXGI.Format.R8G8B8A8_UNorm,
SampleDescription = new SharpDX.DXGI.SampleDescription(1, 1),
Usage = ResourceUsage.Default,
BindFlags = BindFlags.ShaderResource,
CpuAccessFlags = 0
}, new SharpDX.DataRectangle(new IntPtr(texData.Pixels), texData.Width));
fontTextureView = new ShaderResourceView(Device, fontTexture, new ShaderResourceViewDescription()
{
Format = SharpDX.DXGI.Format.R8G8B8A8_UNorm,
Dimension = SharpDX.Direct3D.ShaderResourceViewDimension.Texture2D,
Texture2D = new ShaderResourceViewDescription.Texture2DResource()
{
MipLevels = 1,
MostDetailedMip = 0,
}
});
io.FontAtlas.SetTexID(FontTextureId);
// Create texture sampler
fontSampler = new SamplerState(Device, new SamplerStateDescription()
{
Filter = Filter.MinMagMipLinear,
AddressU = TextureAddressMode.Wrap,
AddressV = TextureAddressMode.Wrap,
AddressW = TextureAddressMode.Wrap,
MipLodBias = 0.0f,
ComparisonFunction = Comparison.Always,
MinimumLod = 0.0f,
MaximumLod = 0.0f
});
// Compile Shader
var vertexShaderByteCode = ShaderBytecode.Compile(vertexShaderCode, "vs_4_0", ShaderFlags.None, EffectFlags.None);
var vertexShader = new VertexShader(Device, vertexShaderByteCode);
var pixelShaderByteCode = ShaderBytecode.Compile(pixelShaderCode, "ps_4_0", ShaderFlags.None, EffectFlags.None);
var pixelShader = new PixelShader(Device, pixelShaderByteCode);
inputLayout = new InputLayout(Device,
ShaderSignature.GetInputSignature(vertexShaderByteCode),
new[]
{
new InputElement("POSITION", 0, Format.R32G32_Float, 0),
new InputElement("TEXCOORD", 0, Format.R32G32_Float, 1),
new InputElement("COLOR", 0, Format.R8G8B8A8_UNorm, 2)
});
vertexConstantBuffer = new Buffer(Device, SharpDX.Utilities.SizeOf <SharpDX.Matrix>(), ResourceUsage.Dynamic, BindFlags.ConstantBuffer, CpuAccessFlags.Write, ResourceOptionFlags.None, 0);
// Create the blending setup
var blendStateDesc = new BlendStateDescription();
blendStateDesc.AlphaToCoverageEnable = true;
blendStateDesc.RenderTarget[0].IsBlendEnabled = true;
blendStateDesc.RenderTarget[0].SourceAlphaBlend = BlendOption.SourceAlpha;
blendStateDesc.RenderTarget[0].DestinationBlend = BlendOption.InverseSourceAlpha;
blendStateDesc.RenderTarget[0].BlendOperation = BlendOperation.Add;
blendStateDesc.RenderTarget[0].SourceBlend = BlendOption.InverseSourceAlpha;
blendStateDesc.RenderTarget[0].DestinationAlphaBlend = BlendOption.Zero;
blendStateDesc.RenderTarget[0].AlphaBlendOperation = BlendOperation.Add;
blendStateDesc.RenderTarget[0].RenderTargetWriteMask = ColorWriteMaskFlags.All;
blendState = new BlendState(Device, blendStateDesc);
// Create the rasterizer state
rasterizerState = new RasterizerState(Device, new RasterizerStateDescription()
{
FillMode = FillMode.Solid,
CullMode = CullMode.None,
IsScissorEnabled = true,
IsDepthClipEnabled = true,
});
// Create depth-stencil State
depthStencilState = new DepthStencilState(Device, new DepthStencilStateDescription()
{
IsDepthEnabled = true,
DepthWriteMask = DepthWriteMask.All,
DepthComparison = Comparison.Always,
IsStencilEnabled = false,
FrontFace = new DepthStencilOperationDescription()
{
FailOperation = StencilOperation.Keep,
DepthFailOperation = StencilOperation.Keep,
PassOperation = StencilOperation.Keep
},
BackFace = new DepthStencilOperationDescription()
{
FailOperation = StencilOperation.Keep,
DepthFailOperation = StencilOperation.Keep,
PassOperation = StencilOperation.Keep
}
});
}
