以下常量指定位图中使用的各种像素格式。

 

FreeBASIC 语法

 

PixelFormat1bppIndexed    = 196865

PixelFormat4bppIndexed    = 197634

PixelFormat8bppIndexed    = 198659

PixelFormat16bppGrayScale = 1052676

PixelFormat16bppRGB555    = 135173

PixelFormat16bppRGB565    = 135174

PixelFormat16bppARGB1555  = 397319

PixelFormat24bppRGB       = 137224

PixelFormat32bppRGB       = 139273

PixelFormat32bppARGB      = 2498570

PixelFormat32bppPARGB     = 925707

PixelFormat48bppRGB       = 1060876

PixelFormat64bppARGB      = 3424269

PixelFormat64bppPARGB     = 29622286

PixelFormatMax            = 15

 

常数

 

PixelFormat1bppIndexed?

 

196865

Specifies that the format is 1 bit per pixel, indexed.

 

PixelFormat4bppIndexed?

 

197634

Specifies that the format is 4 bits per pixel, indexed.

 

PixelFormat8bppIndexed?

 

198659

Specifies that the format is 8 bits per pixel, indexed.

 

PixelFormat16bppARGB1555?

 

397319

Specifies that the format is 16 bits per pixel; 1 bit is used for the alpha component, and 5 bits each are used for the red, green, and blue components.

 

PixelFormat16bppGrayScale?

 

1052676

Specifies that the format is 16 bits per pixel, grayscale.

 

PixelFormat16bppRGB555?

 

135173

Specifies that the format is 16 bits per pixel; 5 bits each are used for the red, green, and blue components. The remaining bit is not used.

 

PixelFormat16bppRGB565?

 

135174

Specifies that the format is 16 bits per pixel; 5 bits are used for the red component, 6 bits are used for the green component, and 5 bits are used for the blue component.

 

PixelFormat24bppRGB?

 

137224

Specifies that the format is 24 bits per pixel; 8 bits each are used for the red, green, and blue components.

 

PixelFormat32bppARGB?

 

2498570

Specifies that the format is 32 bits per pixel; 8 bits each are used for the alpha, red, green, and blue components.

 

PixelFormat32bppPARGB?

 

925707

Specifies that the format is 32 bits per pixel; 8 bits each are used for the alpha, red, green, and blue components. The red, green, and blue components are premultiplied according to the alpha component.

 

PixelFormat32bppRGB?

 

139273

Specifies that the format is 32 bits per pixel; 8 bits each are used for the red, green, and blue components. The remaining 8 bits are not used.

 

PixelFormat48bppRGB?

 

1060876

Specifies that the format is 48 bits per pixel; 16 bits each are used for the red, green, and blue components.

 

PixelFormat64bppARGB?

 

3424269

Specifies that the format is 64 bits per pixel; 16 bits each are used for the alpha, red, green, and blue components.

 

PixelFormat64bppPARGB?

 

29622286

Specifies that the format is 64 bits per pixel; 16 bits each are used for the alpha, red, green, and blue components. The red, green, and blue components are premultiplied according to the alpha component.

 

备注

 

PixelFormat48bppRGB, PixelFormat64bppARGB, and PixelFormat64bppPARGB use 16 bits per color component (channel). Microsoft Windows GDI+ version 1.0 can read 16-bits-per-channel images, but such images are converted to an 8-bits-per-channel format for processing, displaying, and saving.