可以支持多种图片格式：
GraphicEx is open source under the Mozilla Public License (MPL). Please read the license agreement before you start using this library.
- TIFF images (*.tif; *.tiff), extended base line implementation
- byte orders: little endian, big endian
- sample sizes: 1, 2, 4, 8, 16 bits per sample
- color spaces: indexed, grayscale, RGB(A), CMYK, L*a*b*
- compression formats: uncompressed, packed bits, LZW, CCITT T.4 (raw and modified fax group 3, possibly word aligned), ThunderScan, Deflate, new style JPEG
- GFI fax images (*.fax), uses TTIFFGraphic to read
- sample size: 1 bits per sample
- color space: indexed
- compression format: CCITT T.4 (raw and modified fax group 3)
- SGI images (*.bw, *.rgb, *.rgba, *.sgi)
- byte order: big endian
- sample sizes: 1, 2, 4, 8, 16 bits per sample
- color spaces: indexed, grayscale, RGB(A)
- compression formats: uncompressed, RLE
- Autodesk images files (*.cel; *.pic) old style only
- byte order: little endian
- sample size: 8 bits per sample
- color spaces: indexed
- compression format: uncompressed
- Truevision images (*.tga; *.vst; *.icb; *.vda; *.win), write support included
- byte order: little endian
- sample sizes: 5, 8 bits per sample
- color spaces: gray scale, indexed, 15 bits RGB (555), 24 bits RGB(A)(888)
- compression formats: uncompressed, RLE
- ZSoft Paintbrush images (*.pcx, *.pcc)
- byte order: little endian
- sample sizes: 1, 2, 4, 8 bits per sample
- color spaces: gray scale, indexed, RGB
- compression formats: uncompressed, RLE
- Word 5.x screen capture files (*.scr)
- byte order: little endian
- sample sizes: 1, 2, 4, 8 bits per sample
- color spaces: indexed, gray scaleRGB
- compression formats: uncompressed, RLE
- Kodak Photo-CD images (*.pcd)
- byte order: little endian
- samples size: 8 bits per sample
- color space: YCbCr
- compression: PCD Huffmann
- specials:
- sizes: all resolutions, from 192 x 128 up to 6144 x 4096 (64 Base vaporware)
- rotated: clockwise and counter-clockwise
- Portable pixel/gray map images (*.ppm, *.pgm, *.pbm)
- byte order: little endian
- sample sizes: 1, 8 bits per sample
- color spaces: gray scale, indexed, RGB
- compression format: uncompressed
- specials:
- ASCII and Binary format
- Dr. Halo images (*.cut, *.pal)
- byte order: little endian
- sample size: 8 bits per sample
- color spaces: indexed
- compression formats: RLE
- special:
- external palette file (*.pal) is automatically loaded when specified while doing LoadFromStream or when loading the image via LoadFromFile
- CompuServe images (*.gif)
- byte order: little endian
- sample sizes: 1, 4, 8 bits per sample
- color spaces: indexed
- compression format: LZW
- special:
- interlaced, non-interlaced
- SGI Wavefront images (*.rla, *.rpf)
- byte order: big endian
- sample size: 8 bits per sample
- color space: RGB(A)
- compression formats: RLE
- Standard Windows bitmap images (*.bmp, *.rle, *.dib), these formats are natively supported by Delphi's VCL but *.rle and *.dib files are not registered with TPicture by default
- byte order: little endian
- sample sizes: 1, 4, 8 bits per sample
- color spaces: indexed, RGB(A)
- compression formats: uncompressed, RLE
- specials:
- OS/2 bitmap format
- Photoshop images (*.psd, *.pdd)
- byte order: big endian
- sample sizes: 1, 8, 16 bits per sample
- color spaces: indexed, RGB, CMYK, CIE L*a*b*
- compression formats: uncompressed, packed bits
- special:
- duo tone
- Paintshop Pro images (*.psp)
- byte order: little endian
- sample sizes: 1, 4, 8 bits per sample
- color spaces: indexed, gray scale, RGB
- compression formats: uncompressed, LZ77
- Portable network graphic images (*.png)
- byte order: big endian
- sample sizes: 1, 2, 4, 8, 16 bits per sample
- color spaces: indexed, grayscale (alpha), RGB(A)
- compression format: LZ77
- specials:
- supported chunks: IHDR, IDAT, IEND, PLTE, gAMA, tRNS, bKGD
- transparency support partially for RGB, which is stored as 32 bits format
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