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WRaster: Add optional support to JPEG XL

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Detect if libjxl is intalled, and build-in support in raster lib.
Feature can be disabled/enabled at configure time.
This commit is contained in:
David Maciejak
2025-12-27 08:20:14 -05:00
committed by Carlos R. Mafra
parent 67e2f5e1ca
commit 4392fdc291
8 changed files with 297 additions and 3 deletions
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23
wrlib/load.c
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@@ -3,7 +3,7 @@
* Raster graphics library
*
* Copyright (c) 1997-2003 Alfredo K. Kojima
* Copyright (c) 2014-2021 Window Maker Team
* Copyright (c) 2014-2025 Window Maker Team
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
@@ -93,6 +93,9 @@ char **RSupportedFileFormats(void)
#ifdef USE_JPEG
tmp[i++] = "JPEG";
#endif
#ifdef USE_JXL
tmp[i++] = "JXL";
#endif
#ifdef USE_GIF
tmp[i++] = "GIF";
#endif
@@ -219,6 +222,12 @@ RImage *RLoadImage(RContext *context, const char *file, int index)
break;
#endif /* USE_JPEG */
#ifdef USE_JXL
case IM_JXL:
image = RLoadJXL(file);
break;
#endif /* USE_JXL */
#ifdef USE_GIF
case IM_GIF:
image = RLoadGIF(file, index);
@@ -305,6 +314,11 @@ char *RGetImageFileFormat(const char *file)
return "JPEG";
#endif /* USE_JPEG */
#ifdef USE_JXL
case IM_JXL:
return "JXL";
#endif /* USE_JXL */
#ifdef USE_GIF
case IM_GIF:
return "GIF";
@@ -377,6 +391,13 @@ static WRImgFormat identFile(const char *path)
if (buffer[0] == 0xff && buffer[1] == 0xd8)
return IM_JPEG;
/* check for JXL */
if ((buffer[0] == 0xff && buffer[1] == 0x0a) || /* naked codestream */
(buffer[0] == 0x00 && buffer[1] == 0x00 && buffer[2] == 0x00 && buffer[3] == 0x0c && /* container format */
buffer[4] == 0x4a && buffer[5] == 0x58 && buffer[6] == 0x4c && buffer[7] == 0x20 &&
buffer[8] == 0x0d && buffer[9] == 0x0a && buffer[10] == 0x87 && buffer[11] == 0x0a))
return IM_JXL;
/* check for GIF */
if (buffer[0] == 'G' && buffer[1] == 'I' && buffer[2] == 'F' && buffer[3] == '8' &&
(buffer[4] == '7' || buffer[4] == '9') && buffer[5] == 'a')