how to add a xlink:href with png image

[MacroGu]

egg.zip

<image id="Egg" x="0" y="0" width="100" height="100" xlink:href="data:image/png;base64,

[SergeySlice]

1. Add base64_decode: 120 lines

2. Add PNG decode: 1330 lines

3. Add parsing:

   //parse embedded PNG image
   static void parseImage(NSVGparser* p, const char** dict)
   {
   //  NSVGattrib* attr = nsvg__getAttr(p);
   NSVGpattern *pt = NULL;
   int i;
   UINTN len = 0;
   float w,h;
   const char *href = NULL;
   UINT8 *tmpData = NULL;
   EG_IMAGE *NewImage = NULL;
   
   for (i = 0; dict[i]; i += 2) {
   if (strcmp(dict[i], "width") == 0) {
     w = nsvg__parseCoordinate(p, dict[i+1], 0.0f, nsvg__actualWidth(p));
   } else if (strcmp(dict[i], "height") == 0) {
     h = nsvg__parseCoordinate(p, dict[i+1], 0.0f, nsvg__actualHeight(p));
   } else if (strcmp(dict[i], "xlink:href") == 0) {
     href = dict[i+1];
   } else {
     nsvg__parseAttr(p, dict[i], dict[i + 1]);
   }
   }
   if (!href || (strstr(href, "data:image/png;") == NULL)) {
   return;
   }
   href = strstr(href, "base64,") + 7;
   if (p->patternFlag) {
   pt = p->patterns; //the last one
   }
   tmpData = (UINT8 *)Base64Decode((char*)href, &len);
   if (len == 0) {
   DBG("image not decoded from base64\n");
   }
   NewImage = egDecodePNG(tmpData, len, TRUE);
   pt->image = (void *)NewImage;
   if (tmpData) {
   FreePool(tmpData);
   }
   }

4. Then decide how have you use it. I applied the image as pattern to fill the shape which is quirky solution but compatible with nanosvgrast.

[MacroGu]

thanks, I will try it

[MacroGu]

would you please afford the egDecodePNG and Base64Decode functions, EG_IMAGE struct. thanks.

[SergeySlice]

See the full project. nanosvg located in rEFIt_UEFI/libeg/ folder little different from original.

[MacroGu]

would you please give a http link of the full project, where is the refit_uefi/libeg/ folder, I can not find it, thanks.

[MacroGu]

do you mean the https://github.com/Clover-EFI-Bootloader/clover/tree/master/rEFIt_UEFI/libeg this project ?

[SergeySlice]

Not exactly. github project is older then recent on sf.net. Why my link disappears? Clover

[mikrosk]

@MacroGu you might be interested in https://github.com/mtyberg/nanosvg/pull/1, I took @SergeySlice 's code and adapted it on top of the "plain" nanosvg.