本文告诉大家在 DirectX 9 的颜色格式 Format 和 WPF 的 PixelFormat 转换方法
转换代码如下
代码语言：javascript复制 private static PixelFormat TranslateFormatToPixelFormat(D3D9.Format format, bool preMultiplied = true)
{
return format switch
{
D3D9.Format.R8G8B8 => PixelFormats.Bgr24,
D3D9.Format.A8R8G8B8 => preMultiplied ? PixelFormats.Pbgra32 : PixelFormats.Bgra32,
D3D9.Format.X8R8G8B8 => PixelFormats.Bgr32,
//D3D9.Format.R5G6B5 => PixelFormats.Bgr16bpp565,
//D3D9.Format.X1R5G5B5 => PixelFormats.BGR16bpp555,
D3D9.Format.P8 => PixelFormats.Indexed8,
D3D9.Format.L8 => PixelFormats.Gray8,
D3D9.Format.A2R10G10B10 => PixelFormats.Bgr101010,
D3D9.Format.A32B32G32R32F => preMultiplied ? PixelFormats.Prgba128Float : PixelFormats.Rgb128Float,
_ => throw new NotSupportedException(),
};
}值得一说的是 SharpDx 当前官方不维护了，可以选择的代替请看 SharpDx 的代替项目
在 WPF 的 PixelFormat 是和 WIC 层关联的，定义的代码如下
代码语言：javascript复制 static Guid GetGuidFromFormat(PixelFormatEnum format)
{
switch (format)
{
case PixelFormatEnum.Default:
return WICPixelFormatGUIDs.WICPixelFormatDontCare;
case PixelFormatEnum.Indexed1:
return WICPixelFormatGUIDs.WICPixelFormat1bppIndexed;
case PixelFormatEnum.Indexed2:
return WICPixelFormatGUIDs.WICPixelFormat2bppIndexed;
case PixelFormatEnum.Indexed4:
return WICPixelFormatGUIDs.WICPixelFormat4bppIndexed;
case PixelFormatEnum.Indexed8:
return WICPixelFormatGUIDs.WICPixelFormat8bppIndexed;
case PixelFormatEnum.BlackWhite:
return WICPixelFormatGUIDs.WICPixelFormatBlackWhite;
case PixelFormatEnum.Gray2:
return WICPixelFormatGUIDs.WICPixelFormat2bppGray;
case PixelFormatEnum.Gray4:
return WICPixelFormatGUIDs.WICPixelFormat4bppGray;
case PixelFormatEnum.Gray8:
return WICPixelFormatGUIDs.WICPixelFormat8bppGray;
case PixelFormatEnum.Bgr555:
return WICPixelFormatGUIDs.WICPixelFormat16bppBGR555;
case PixelFormatEnum.Bgr565:
return WICPixelFormatGUIDs.WICPixelFormat16bppBGR565;
case PixelFormatEnum.Bgr24:
return WICPixelFormatGUIDs.WICPixelFormat24bppBGR;
case PixelFormatEnum.Rgb24:
return WICPixelFormatGUIDs.WICPixelFormat24bppRGB;
case PixelFormatEnum.Bgr101010:
return WICPixelFormatGUIDs.WICPixelFormat32bppBGR101010;
case PixelFormatEnum.Bgr32:
return WICPixelFormatGUIDs.WICPixelFormat32bppBGR;
case PixelFormatEnum.Bgra32:
return WICPixelFormatGUIDs.WICPixelFormat32bppBGRA;
case PixelFormatEnum.Pbgra32:
return WICPixelFormatGUIDs.WICPixelFormat32bppPBGRA;
case PixelFormatEnum.Rgb48:
return WICPixelFormatGUIDs.WICPixelFormat48bppRGB;
case PixelFormatEnum.Rgba64:
return WICPixelFormatGUIDs.WICPixelFormat64bppRGBA;
case PixelFormatEnum.Prgba64:
return WICPixelFormatGUIDs.WICPixelFormat64bppPRGBA;
case PixelFormatEnum.Gray16:
return WICPixelFormatGUIDs.WICPixelFormat16bppGray;
case PixelFormatEnum.Gray32Float:
return WICPixelFormatGUIDs.WICPixelFormat32bppGrayFloat;
case PixelFormatEnum.Rgb128Float:
return WICPixelFormatGUIDs.WICPixelFormat128bppRGBFloat;
case PixelFormatEnum.Rgba128Float:
return WICPixelFormatGUIDs.WICPixelFormat128bppRGBAFloat;
case PixelFormatEnum.Prgba128Float:
return WICPixelFormatGUIDs.WICPixelFormat128bppPRGBAFloat;
case PixelFormatEnum.Cmyk32:
return WICPixelFormatGUIDs.WICPixelFormat32bppCMYK;
}
throw new System.ArgumentException (SR.Get(SRID.Image_BadPixelFormat, format), "format");
}对应的逻辑如下
代码语言：javascript复制 internal static class WICPixelFormatGUIDs
{
/* Undefined formats */
internal static readonly Guid WICPixelFormatDontCare = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x00);
/* Indexed formats */
internal static readonly Guid WICPixelFormat1bppIndexed = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x01);
internal static readonly Guid WICPixelFormat2bppIndexed = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x02);
internal static readonly Guid WICPixelFormat4bppIndexed = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x03);
internal static readonly Guid WICPixelFormat8bppIndexed = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x04);
internal static readonly Guid WICPixelFormatBlackWhite = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x05);
internal static readonly Guid WICPixelFormat2bppGray = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x06);
internal static readonly Guid WICPixelFormat4bppGray = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x07);
internal static readonly Guid WICPixelFormat8bppGray = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x08);
/* sRGB formats (gamma is approx. 2.2) */
/* For a full definition, see the sRGB spec */
/* 16bpp formats */
internal static readonly Guid WICPixelFormat16bppBGR555 = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x09);
internal static readonly Guid WICPixelFormat16bppBGR565 = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x0a);
internal static readonly Guid WICPixelFormat16bppGray = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x0b);
/* 24bpp formats */
internal static readonly Guid WICPixelFormat24bppBGR = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x0c);
internal static readonly Guid WICPixelFormat24bppRGB = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x0d);
/* 32bpp format */
internal static readonly Guid WICPixelFormat32bppBGR = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x0e);
internal static readonly Guid WICPixelFormat32bppBGRA = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x0f);
internal static readonly Guid WICPixelFormat32bppPBGRA = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x10);
internal static readonly Guid WICPixelFormat32bppGrayFloat = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x11);
/* scRGB formats. Gamma is 1.0 */
/* For a full definition, see the scRGB spec */
/* 32bpp format */
internal static readonly Guid WICPixelFormat32bppBGR101010 = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x14);
/* 48bpp format */
internal static readonly Guid WICPixelFormat48bppRGB = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x15);
/* 64bpp format */
internal static readonly Guid WICPixelFormat64bppRGBA = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x16);
internal static readonly Guid WICPixelFormat64bppPRGBA = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x17);
/* Floating point scRGB formats */
internal static readonly Guid WICPixelFormat128bppRGBAFloat = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x19);
internal static readonly Guid WICPixelFormat128bppPRGBAFloat = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x1a);
internal static readonly Guid WICPixelFormat128bppRGBFloat = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x1b);
/* CMYK formats. */
internal static readonly Guid WICPixelFormat32bppCMYK = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x1c);
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