README.md

libqpsd

PSD (Photoshop Document) & PSB (Photoshop Big) Plugin for Qt/C++ (Qt4/Qt5)

This project is based on the Photoshop File Format Specification found in http://www.adobe.com/devnet-apps/photoshop/fileformatashtml/PhotoshopFileFormats.htm

FEATURES

Supported Formats

• PSD
• PSB

Supported Compressions

• Raw
• RLE
• Zip without Prediction
• Zip with Prediction

Supported Color Modes

• Bitmap
• Grayscale
• Indexed
• RGB
• CMYK
• Multichannel
• Duotone
• Lab

Supported Depths

• 1-bit (Bitmap)
• 8-bits
• 16-bits (Note: 16-bit depth is scaled down to 8-bits)
• 32-bits (Tonemapping Algorithm, needed help!)

CONTRIBUTE

• If you have an existing PSD/PSB file with different color mode or compression. Feel free to send me an email. I need samples with zip-compressed layers (zip w/ or w/o prediction).
• If you want to contribute to the code, just fork the project and pull requests.
• If you want to keep this project alive you can send your donations to:
  • Bitcoin: 3A23hHJF8q8hNPz3sedqD9T7g25ELPcvg2
  • Paypal: https://www.paypal.me/RonieMartinez

AUTHOR

• Ronie Martinez

CONTRIBUTORS

• Yuezhao Huang
• Markus Diem
• stepanp
• Eli Schwartz
• username asgohtals contributed PSB files for testing:
  • berlin-cmyk.psb
  • berlin-quadtone.psb
  • wall-small-Lab.psb

LIST OF SOFTWARE USING libqpsd

• nomacs
• EzViewer
• PhotoQt
• Seer
• for applications not included in the list, shoot me an email

REFERENCES

• http://www.adobe.com/devnet-apps/photoshop/fileformatashtml/PhotoshopFileFormats.htm
• http://www.brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html
• http://help.adobe.com/en_US/photoshop/cs/using/WSfd1234e1c4b69f30ea53e41001031ab64-73eea.html#WSfd1234e1c4b69f30ea53e41001031ab64-73e5a
• http://www.adobe.com/digitalimag/pdfs/AdobeRGB1998.pdf