jpegxl.c File Reference

implementation of content handling for image/jpegxl More...

#include <stdbool.h>
#include <stdlib.h>
#include <setjmp.h>
#include <string.h>
#include <jxl/decode.h>
#include "utils/utils.h"
#include "utils/log.h"
#include "utils/messages.h"
#include "netsurf/bitmap.h"
#include "content/llcache.h"
#include "content/content.h"
#include "content/content_protected.h"
#include "content/content_factory.h"
#include "desktop/gui_internal.h"
#include "desktop/bitmap.h"
#include "image/image_cache.h"
#include "image/jpegxl.h"

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Functions
static nserror	nsjpegxl_create (const content_handler *handler, lwc_string *imime_type, const struct http_parameter *params, llcache_handle *llcache, const char *fallback_charset, bool quirks, struct content **c)
	Content create entry point. More...
static struct bitmap *	jpegxl_cache_convert (struct content *c)
	create a bitmap from jpeg xl content. More...
static bool	jxl_report_fail (struct content *c, JxlDecoderStatus decstatus, const char *msg)
	report failiure More...
static bool	nsjpegxl_convert (struct content *c)
	Convert a CONTENT_JPEGXL for display. More...
static nserror	nsjpegxl_clone (const struct content *old, struct content **newc)
	Clone content. More...
	CONTENT_FACTORY_REGISTER_TYPES (nsjpegxl, nsjpegxl_types, nsjpegxl_content_handler)

Variables
static const JxlPixelFormat	jxl_output_format
	output image format More...
static const content_handler	nsjpegxl_content_handler
static const char *	nsjpegxl_types []

Detailed Description

implementation of content handling for image/jpegxl

This implementation uses the JXL library.

Definition in file jpegxl.c.

Function Documentation

CONTENT_FACTORY_REGISTER_TYPES()

CONTENT_FACTORY_REGISTER_TYPES	(	nsjpegxl	,
		nsjpegxl_types	,
		nsjpegxl_content_handler
	)

jpegxl_cache_convert()

static struct bitmap * jpegxl_cache_convert ( struct content *  c )

static

create a bitmap from jpeg xl content.

TODO: At the moment we have to set the layout to the only pixel layout that libjxl supports. It looks like they plan to add support for decoding to other layouts in the future, as shown by the TODO in the docs:

https://libjxl.readthedocs.io/en/latest/api_common.html#_CPPv414JxlPixelFormat

Definition at line 91 of file jpegxl.c.

References netsurf_table::bitmap, bitmap(), bitmap_format_to_client(), BITMAP_LAYOUT_R8G8B8A8, BITMAP_NONE, BITMAP_OPAQUE, content__get_source_data(), gui_bitmap_table::create, gui_bitmap_table::destroy, gui_bitmap_table::get_buffer, guit, content::height, jxl_output_format, bitmap_fmt::layout, gui_bitmap_table::modified, NSLOG, bitmap_fmt::pma, content::size, and content::width.

Referenced by nsjpegxl_convert().

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jxl_report_fail()

static bool jxl_report_fail ( struct content *  c, JxlDecoderStatus  decstatus, const char *  msg  )

static

report failiure

Definition at line 203 of file jpegxl.c.

References content_broadcast(), CONTENT_MSG_ERROR, content_msg_data::errorcode, content_msg_data::errordata, content_msg_data::errormsg, content_msg_data::msg, NSERROR_UNKNOWN, and NSLOG.

Referenced by nsjpegxl_convert().

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nsjpegxl_clone()

static nserror nsjpegxl_clone ( const struct content *  old, struct content **  newc  )

static

Clone content.

Definition at line 295 of file jpegxl.c.

References content__clone(), content_destroy(), CONTENT_STATUS_DONE, CONTENT_STATUS_READY, NSERROR_CLONE_FAILED, NSERROR_NOMEM, NSERROR_OK, nsjpegxl_convert(), and content::status.

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nsjpegxl_convert()

static bool nsjpegxl_convert ( struct content *  c )

static

Convert a CONTENT_JPEGXL for display.

Definition at line 216 of file jpegxl.c.

References content__get_source_data(), content__set_title(), content_broadcast(), CONTENT_MSG_ERROR, content_set_done(), content_set_ready(), content_set_status(), content_msg_data::errorcode, content_msg_data::errordata, content_msg_data::errormsg, content::height, image_cache_add(), jpegxl_cache_convert(), jxl_output_format, jxl_report_fail(), content::llcache, llcache_handle_get_url(), messages_get_buff(), NSERROR_UNKNOWN, NSLOG, nsurl_access_leaf(), content::size, content_msg_data::title, and content::width.

Referenced by nsjpegxl_clone().

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nsjpegxl_create()

static nserror nsjpegxl_create ( const content_handler *  handler, lwc_string *  imime_type, const struct http_parameter *  params, llcache_handle *  llcache, const char *  fallback_charset, bool  quirks, struct content **  c  )

static

Content create entry point.

Definition at line 63 of file jpegxl.c.

References content__init(), content::fallback_charset, content::handler, llcache, NSERROR_NOMEM, NSERROR_OK, and content::quirks.

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Variable Documentation

jxl_output_format

const JxlPixelFormat jxl_output_format

static

Initial value:

= {
        .num_channels = 4,
        .data_type    = JXL_TYPE_UINT8,
        .endianness   = JXL_LITTLE_ENDIAN,
        .align        = 0,
}

output image format

Definition at line 52 of file jpegxl.c.

Referenced by jpegxl_cache_convert(), and nsjpegxl_convert().

nsjpegxl_content_handler

const content_handler nsjpegxl_content_handler

static

Initial value:

= {
        .create = nsjpegxl_create,
        .data_complete = nsjpegxl_convert,
        .destroy = image_cache_destroy,
        .redraw = image_cache_redraw,
        .clone = nsjpegxl_clone,
        .get_internal = image_cache_get_internal,
        .type = image_cache_content_type,
        .is_opaque = image_cache_is_opaque,
        .no_share = false,
}

Definition at line 324 of file jpegxl.c.

nsjpegxl_types

const char* nsjpegxl_types[]

static

Initial value:

= {
        "image/jxl",
}

Definition at line 336 of file jpegxl.c.