David:
I've attached a librsvg based svg loader for evas in case
you might find it useful.. it uses a scale of 90 dpi for rendering,
and needs librsvg >= 2.13.
If you want to give this a try, you will have to add it to
evas... then test it, and possibly debug it.. :( I've not had, and
likely won't have, a chance to do so anytime soon.
jose.
#include "evas_common.h"
#include "evas_private.h"
#include <librsvg/rsvg.h>
#include <librsvg/rsvg-cairo.h>
int evas_image_load_file_head_svg(RGBA_Image *im, const char *file, const char *key);
int evas_image_load_file_data_svg(RGBA_Image *im, const char *file, const char *key);
Evas_Image_Load_Func evas_image_load_svg_func =
{
evas_image_load_file_head_svg,
evas_image_load_file_data_svg
};
static int rsvg_initialized = 0;
static void svg_loader_unpremul_data(DATA32 *data, unsigned int len);
static void svg_loader_unpremul_data(DATA32 *data, unsigned int len)
{
DATA32 *de = data + len;
while (data < de)
{
DATA32 a = A_VAL(data);
if (a && (a < 255))
{
R_VAL(data) = (R_VAL(data) * 255) / a;
G_VAL(data) = (G_VAL(data) * 255) / a;
B_VAL(data) = (B_VAL(data) * 255) / a;
}
data++;
}
}
int
evas_image_load_file_head_svg(RGBA_Image *im, const char *file, const char *key)
{
DATA32 *ptr, *end;
FILE *f;
RsvgHandle *rsvg;
RsvgDimensionData dim;
if (!file) return 0;
rsvg = rsvg_handle_new_from_file(file, NULL);
if (!rsvg)
return 0;
if (!im->image)
{
im->image = evas_common_image_surface_new(im);
if (!im->image)
{
rsvg_handle_free(rsvg);
return 0;
}
}
rsvg_handle_set_dpi_x_y(rsvg, 90, 90);
rsvg_handle_get_dimensions(rsvg, &dim);
im->image->w = dim.width;
im->image->h = dim.height;
im->flags |= RGBA_IMAGE_HAS_ALPHA;
rsvg_handle_free(rsvg);
return 1;
}
/** FIXME: All evas loaders need to be tightened up **/
int
evas_image_load_file_head_svg(RGBA_Image *im, const char *file, const char *key)
{
DATA32 *ptr, *end;
FILE *f;
RsvgHandle *rsvg;
RsvgDimensionData dim;
int w, h;
cairo_surface_t *surface;
cairo_t *cr;
if (!file) return 0;
if (!im->image) return 0;
rsvg = rsvg_handle_new_from_file(file, NULL);
if (!rsvg)
{
evas_common_image_surface_free(im->image);
im->image = NULL;
return 0;
}
rsvg_handle_set_dpi_x_y(rsvg, 90, 90);
rsvg_handle_get_dimensions(rsvg, &dim);
w = dim.width;
h = dim.height;
im->image->w = w;
im->image->h = h;
im->flags |= RGBA_IMAGE_HAS_ALPHA;
evas_common_image_surface_alloc(im->image);
if (!im->image->data)
{
evas_common_image_surface_free(im->image);
im->image = NULL;
rsvg_handle_free(rsvg);
return 0;
}
surface = cairo_image_surface_create_for_data((unsigned char *)im->image->data, CAIRO_FORMAT_ARGB32,
w, h, w * sizeof(DATA32));
if (!surface)
{
evas_common_image_surface_free(im->image);
im->image = NULL;
rsvg_handle_free(rsvg);
return 0;
}
cr = cairo_create(surface);
if (!cr)
{
cairo_surface_destroy(surface);
evas_common_image_surface_free(im->image);
im->image = NULL;
rsvg_handle_free(rsvg);
return 0;
}
rsvg_handle_render_cairo(rsvg, cr);
cairo_surface_destroy(surface);
/* need to check if this is required... */
cairo_destroy(cr);
rsvg_handle_free(rsvg);
/* un-premul the im data */
svg_loader_unpremul_data(im->image->data, w * h);
return 1;
}
int module_open(Evas_Module *em)
{
if (!em) return 0;
em->functions = (void *)(&evas_image_load_svg_func);
if (!rsvg_initialized)
rsvg_init();
rsvg_initialized = 1;
return 1;
}
void module_close(void)
{
rsvg_term();
rsvg_initialized = 0;
}
Evas_Module_Api evas_modapi =
{
EVAS_MODULE_API_VERSION,
EVAS_MODULE_TYPE_IMAGE_LOADER,
"svg",
"none"
};
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