rsvg.c File Reference

implementation of content handler for image/svg using librsvg. More...

#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>
#include <string.h>
#include <sys/types.h>
#include <librsvg/rsvg.h>
#include <librsvg/rsvg-cairo.h>
#include <nsutils/endian.h>
#include "utils/log.h"
#include "utils/utils.h"
#include "utils/messages.h"
#include "netsurf/plotters.h"
#include "netsurf/bitmap.h"
#include "netsurf/content.h"
#include "content/llcache.h"
#include "content/content_protected.h"
#include "content/content_factory.h"
#include "desktop/gui_internal.h"
#include "desktop/bitmap.h"
#include "image/rsvg.h"

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Data Structures
struct	rsvg_content

Typedefs
typedef struct rsvg_content	rsvg_content

Functions
static nserror	rsvg_create_svg_data (rsvg_content *c)
static nserror	rsvg_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 bool	rsvg_process_data (struct content *c, const char *data, unsigned int size)
static bool	rsvg_convert (struct content *c)
static bool	rsvg_redraw (struct content *c, struct content_redraw_data *data, const struct rect *clip, const struct redraw_context *ctx)
static void	rsvg_destroy (struct content *c)
static nserror	rsvg_clone (const struct content *old, struct content **newc)
static void *	rsvg_get_internal (const struct content *c, void *context)
static content_type	rsvg_content_type (void)
static bool	rsvg_content_is_opaque (struct content *c)
	CONTENT_FACTORY_REGISTER_TYPES (nsrsvg, rsvg_types, rsvg_content_handler)

Variables
static const content_handler	rsvg_content_handler
static const char *	rsvg_types []

Detailed Description

implementation of content handler for image/svg using librsvg.

SVG files are rendered to a NetSurf bitmap by creating a Cairo rendering surface (content_rsvg_data.cs) over the bitmap's data, creating a Cairo drawing context using that surface, and then passing that drawing context to librsvg which then uses Cairo calls to plot the graphic to the bitmap. We store this in content->bitmap, and then use the usual bitmap plotter function to render it for redraw requests.

Definition in file rsvg.c.

Typedef Documentation

rsvg_content

typedef struct rsvg_content rsvg_content

Function Documentation

CONTENT_FACTORY_REGISTER_TYPES()

CONTENT_FACTORY_REGISTER_TYPES	(	nsrsvg	,
		rsvg_types	,
		rsvg_content_handler
	)

rsvg_clone()

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

static

Definition at line 228 of file rsvg.c.

References rsvg_content::base, content__clone(), content__get_source_data(), content_destroy(), CONTENT_STATUS_DONE, CONTENT_STATUS_READY, NSERROR_CLONE_FAILED, NSERROR_NOMEM, NSERROR_OK, rsvg_convert(), rsvg_create_svg_data(), rsvg_process_data(), content::size, and content::status.

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rsvg_content_is_opaque()

static bool rsvg_content_is_opaque ( struct content *  c )

static

Definition at line 286 of file rsvg.c.

References rsvg_content::bitmap, netsurf_table::bitmap, gui_bitmap_table::get_opaque, and guit.

rsvg_content_type()

static content_type rsvg_content_type ( void  )

static

Definition at line 280 of file rsvg.c.

References CONTENT_IMAGE.

rsvg_convert()

static bool rsvg_convert ( struct content *  c )

static

Definition at line 132 of file rsvg.c.

References rsvg_content::bitmap, netsurf_table::bitmap, bitmap_format_to_client(), BITMAP_NONE, content_broadcast_error(), content_set_done(), content_set_ready(), content_set_status(), gui_bitmap_table::create, rsvg_content::cs, rsvg_content::ct, gui_bitmap_table::get_buffer, gui_bitmap_table::get_rowstride, guit, content::height, gui_bitmap_table::modified, NSERROR_NOMEM, NSERROR_SVG_ERROR, NSLOG, rsvg_content::rsvgh, and content::width.

Referenced by rsvg_clone().

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rsvg_create()

static nserror rsvg_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

Definition at line 84 of file rsvg.c.

References rsvg_content::base, content__init(), llcache, NSERROR_NOMEM, NSERROR_OK, and rsvg_create_svg_data().

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rsvg_create_svg_data()

static nserror rsvg_create_svg_data ( rsvg_content *  c )

static

Definition at line 67 of file rsvg.c.

References rsvg_content::base, rsvg_content::bitmap, content_broadcast_error(), rsvg_content::cs, rsvg_content::ct, NSERROR_NOMEM, NSERROR_OK, NSLOG, and rsvg_content::rsvgh.

Referenced by rsvg_clone(), and rsvg_create().

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rsvg_destroy()

static void rsvg_destroy ( struct content *  c )

static

Definition at line 216 of file rsvg.c.

References rsvg_content::bitmap, netsurf_table::bitmap, rsvg_content::cs, rsvg_content::ct, gui_bitmap_table::destroy, guit, and rsvg_content::rsvgh.

rsvg_get_internal()

static void * rsvg_get_internal ( const struct content *  c, void *  context  )

static

Definition at line 273 of file rsvg.c.

References rsvg_content::bitmap.

rsvg_process_data()

static bool rsvg_process_data ( struct content *  c, const char *  data, unsigned int  size  )

static

Definition at line 115 of file rsvg.c.

References content_broadcast_error(), NSERROR_SVG_ERROR, NSLOG, rsvg_content::rsvgh, and content::size.

Referenced by rsvg_clone().

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rsvg_redraw()

static bool rsvg_redraw ( struct content *  c, struct content_redraw_data *  data, const struct rect *  clip, const struct redraw_context *  ctx  )

static

Definition at line 195 of file rsvg.c.

References content_redraw_data::background_colour, rsvg_content::bitmap, plotter_table::bitmap, BITMAPF_NONE, BITMAPF_REPEAT_X, BITMAPF_REPEAT_Y, content_redraw_data::height, NSERROR_OK, redraw_context::plot, content_redraw_data::repeat_x, content_redraw_data::repeat_y, content_redraw_data::width, content_redraw_data::x, and content_redraw_data::y.

Variable Documentation

rsvg_content_handler

const content_handler rsvg_content_handler

static

Initial value:

= {
        .create = rsvg_create,
        .process_data = rsvg_process_data,
        .data_complete = rsvg_convert,
        .destroy = rsvg_destroy,
        .redraw = rsvg_redraw,
        .clone = rsvg_clone,
        .get_internal = rsvg_get_internal,
        .type = rsvg_content_type,
        .is_opaque = rsvg_content_is_opaque,
        .no_share = false,
}

Definition at line 298 of file rsvg.c.

rsvg_types

const char* rsvg_types[]

static

Initial value:

= {
        "image/svg",
        "image/svg+xml"
}

Definition at line 311 of file rsvg.c.