How to add SVG images for icons, etc., to a plugin project?

[Rick E Johnson]

I'd like to use SVG resources in my Hot Door CORE plugin project, but I cannot get them to work (PNG images work just fine, but I want the clarity of SVG at various sizes). There's no example to follow, so I'm adapting the technique for PNGI images. I know this isn't standard SDK procedure, but I hope the syntax is familiar enough to some that it makes sense.

in IDtoFile:

29001.svg imgCompass-01.svg
29011.svg imgCompassDark-01.svg

in ResourceIDs.rh:

#define AT_compass1_SVG_RSRC_ID 29001
#define AT_compass1_SVG_RSRC_NAME "imgCompass-01"
#define AT_compass1_SVG_RSRC_FILE "imgCompass-01.svg"

#define AT_compass1_DARK_SVG_RSRC_ID 29011
#define AT_compass1_DARK_SVG_RSRC_NAME "imgCompassDark-01"
#define AT_compass1_DARK_SVG_RSRC_FILE "imgCompassDark-01.svg"

in Resources.r:

read 'SVG' (AT_compass1_SVG_RSRC_ID, AT_compass1_SVG_RSRC_NAME)  AT_compass1_SVG_RSRC_FILE;
read 'SVG' (AT_compass1_DARK_SVG_RSRC_ID, AT_compass1_DARK_SVG_RSRC_NAME)  AT_compass1_DARK_SVG_RSRC_FILE;

in Resources.rc:

AT_compass1_SVG_RSRC_ID SVG AT_compass1_SVG_RSRC_FILE
AT_compass1_DARK_SVG_RSRC_ID SVG AT_compass1_DARK_SVG_RSRC_FILE

In my main cpp file:

hdi::core::Label labl = hdi::core::Label(hdi::core::Rect(20,36,26,24),hdi::core::SVGWithRolloverIDs(
    AT_compass1_SVG_RSRC_ID,
    AT_compass1_DARK_SVG_RSRC_ID));
this->myDlg.addWidget(labl);

The SVG images are exported from Illustrator 2020, size 26x24 px, using the default export settings. No image appears in Illustrator 2020 on either Mac or Windows. What am I doing wrong? Any suggestions would be very much appreciated!

[Rick E Johnson]

Well, I have partial success: On Mac, in Xcode, Project > Build Phases > Run Script, add these lines:

mkdir "$INSTALL_DIR/$FULL_PRODUCT_NAME/Contents/Resources/svg" 2> /dev/null
cp "$PROJECT_DIR/../../../Images/"*.svg "$INSTALL_DIR/$FULL_PRODUCT_NAME/Contents/Resources/svg/"

I can't find anything in the Windows Visual Studio project that specifies any resource types. I have a hunch the problem is in the .rc file. Is "SVG" correct or should it have a four-character descriptor like "PNGI" does? Any suggestions would be very much appreciated!

[Rick E Johnson]

It turns out that in the Windows .rc file, it does need a four-character type, which is SVG_ with an underscore.