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alpha (opacity) setting in raster png/jpg within svg exports

This commit is contained in:
Stefan Frederik 2022-01-23 23:16:31 +01:00
parent 348802c655
commit ff1888b207
1 changed files with 8 additions and 2 deletions
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10
src/svgdraw.c
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@ -557,18 +557,24 @@ void svg_embedded_image(int i)
const char *ptr;
double x1,y1,x2,y2;
int jpg = 0;
char opacity[100];
double alpha = 1.0;
x1=X_TO_SVG(r->x1);
y1=Y_TO_SVG(r->y1);
x2=X_TO_SVG(r->x2);
y2=Y_TO_SVG(r->y2);
ptr = get_tok_value(r->prop_ptr, "alpha", 0);
if(ptr[0]) alpha = atof(ptr);
ptr = get_tok_value(r->prop_ptr, "image_data", 0);
if(alpha == 1.0) strcpy(opacity, "");
else my_snprintf(opacity, S(opacity), "style=\"opacity:%g;\"", alpha);
if(ptr[0]) {
if(!strncmp(ptr, "/9j/4", 5)) jpg = 1; /* jpeg base64 header (30 bits checked) */
fprintf(fd, "<image x=\"%g\" y=\"%g\" width=\"%g\" height=\"%g\" "
fprintf(fd, "<image x=\"%g\" y=\"%g\" width=\"%g\" height=\"%g\" %s "
"xlink:href=\"data:image/%s;base64,%s\"/>\n",
x1, y1, x2 - x1, y2 - y1, jpg ? "jpg" : "png", ptr);
x1, y1, x2 - x1, y2 - y1, opacity, jpg ? "jpg" : "png", ptr);
}
}