0.14.0 "Fit To" c-bindings equivalent in 0.44.0

[clicketyclackety]

Previously we have used the following code in the c bindings

var fitTo = new DrawingUtilitiesPInvokes.resvg_fit_to();

fitTo._fitToType = 1;
fitTo._value = (float)width;

DrawingUtilitiesPInvokes.resvg_render(renderTree, fitto, (uint)width, (uint)height, pBytes);

But now in 0.44.0, the Fit To zoom does not exist anymore. I've tried using some transform code and using the Bounds, but not managed to replicate the icons as they were. Can anyone offer any assistance in replicating this functionality? I would very much like to update our dependency to 0.44.0

DrawingUtilitiesPInvokes.resvg_transform transform = DrawingUtilitiesPInvokes.resvg_transform_identity();

float fWidth = width;
float fHeight = height;

// Ensures the scaling is correct
DrawingUtilitiesPInvokes.resvg_rect svgBounds = new DrawingUtilitiesPInvokes.resvg_rect();
if (DrawingUtilitiesPInvokes.resvg_get_image_bbox(renderTree, ref svgBounds))
{
  float maxSize = Math.Max(fWidth, fHeight);
  float maxBoundsSize = Math.Max(svgBounds.width, svgBounds.height);
  float scale = maxSize / maxBoundsSize;

  transform = new DrawingUtilitiesPInvokes.resvg_transform()
  {
    a = scale,
    b = 0,
    c = 0,
    d = scale,
    e = -svgBounds.x * scale
    f = -svgBounds.y * scale
  };
}

GCHandle pinnedArray = GCHandle.Alloc(pixmap, GCHandleType.Pinned);
IntPtr pBytes = pinnedArray.AddrOfPinnedObject();

DrawingUtilitiesPInvokes.resvg_render(renderTree, transform, (uint)width, (uint)height, pBytes);

[RazrFalcon]

v0.14 was long time ago. Can you explain what behavior do you want? Preferably with images.

[clicketyclackety]

Thanks for getting back to me so quickly @RazrFalcon,

Our software has panels and toolbars which allow customization with an SVG of any size. This is what it currently looks like using 0.14.0

0.14.0 (current)

Using 0.44.0 (with an identity transform)

Using 0.44.0 (with my above transform calculation code)

Looks good, a bit more zoomed in than before? Some others do not look good however, as below;

I would like our software to render the icons identically with 0.14.0 and 0.44.0, so I need an accurate way to replicate the FitTo using a transform (as far as I can see)

[RazrFalcon]

Can you share a single SVG icon of yours? Or at least the first element of it, i.e. the <svg ... one.

Also, FitTo was removed in 0.33.0, so you can try 0.32 for now.

Overall, it's hard to say what is wrong. For starters, you should use resvg_get_image_size instead of resvg_get_image_bbox. This should help.
And use only width for scale calculation instead of width or height.