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Start work on OutputIntent and better color support in PDFio:

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- Add CGATS001-compatible "micro" ICC profile as a standard CMYK color space
  (this is the default used by several Adobe applications)
- Add `PDFIO_CS_CGATS001` color space enum.
- Extend `pdfioArrayCreateColorFromStandard` to support CMYK.
- Extend `pdfioFileCreateImageObjFromFile` to support CMYK JPEG files.
- Update `pdfioFileCreatePage` to add default grayscale, RGB, and CMYK color
  space resources as needed.
This commit is contained in:
Michael R Sweet
2025-04-13 13:31:19 -04:00
parent 3d9c22aa49
commit acd68df592
9 changed files with 577 additions and 13 deletions
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5
pdfio-content.h
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@@ -1,7 +1,7 @@
//
// Public content header file for PDFio.
//
// Copyright © 2021-2023 by Michael R Sweet.
// Copyright © 2021-2025 by Michael R Sweet.
//
// Licensed under Apache License v2.0. See the file "LICENSE" for more
// information.
@@ -23,7 +23,8 @@ typedef enum pdfio_cs_e // Standard color spaces
{
PDFIO_CS_ADOBE, // AdobeRGB 1998
PDFIO_CS_P3_D65, // Display P3
PDFIO_CS_SRGB // sRGB
PDFIO_CS_SRGB, // sRGB
PDFIO_CS_CGATS001 // CGATS001 (CMYK)
} pdfio_cs_t;
typedef enum pdfio_linecap_e // Line capping modes