Aboslute positioning of images not working as expected

[mroavi]

System info

quarto-cli git version: d7a4cf1cc

❯ quarto check

[✓] Checking Quarto installation......OK
      Version: 99.9.9
      Path: /home/mroavi/repos/quarto-cli/package/dist/bin

[✓] Checking basic markdown render....OK

[✓] Checking Python 3 installation....OK
      Version: 3.10.4
      Path: /usr/bin/python3
      Jupyter: 4.10.0
      Kernels: julia-1.5, julia-1.7, python3

[✓] Checking Jupyter engine render....OK

[✓] Checking R installation...........(None)

      Unable to locate an installed version of R.
      Install R from https://cloud.r-project.org/

I'm not using RStudio IDE.

My system:

OS: Manjaro Linux x86_64
Host: XPS 13 9360
Kernel: 5.15.36-1-rt41-MANJARO

Bug description

The height parameter does not seem to be working as expected when using absolute positioning of images. For example, the following code generates two slides with images of the same size.

---
format:
  revealjs:
    incremental: false   
---

# Test

![](image.png){.absolute top=200 left=500 height="500"}

# Test

![](image.png){.absolute top=200 left=500 height="1000"}

Here are the properties of the image I'm using:

Here is the image itself (not sure if GitHub compresses it):

Apparently, the image stops being resized if the height value is above a certain threshold. Moreover, Changing the width parameter has different behavior than changing the height. I also noticed that the image automatically appears way smaller than when using something like ![](image.png){width=60% fig-align="center"}.

Checklist

• [X] formatted your issue so it is easier for us to read?
• [X] included a minimal, self-contained, and reproducible example?
• [X] documented the quarto version you're running, by providing the output produced by quarto check in a terminal in your issue?
• [X] documented the RStudio IDE version you're running (if applicable), by providing the value displayed in the "About RStudio" main menu dialog?
• [X] documented which operating system you're running? If on Linux, please provide the specific distribution as well.
• [X] upgraded to the latest version, including your versions of R, the RStudio IDE, and relevant R packages?

[jjallaire]

@cderv I'm not sure if this is something we can actually resolve given how reveal handles images and sizes. I'm targeting for "Future" but it would be good to know the lay of the landscape when you get a chance to take a closer look at this.

[braniii]

I can reproduce this issue. Taking a look at the html inspector it seems that the following lines are defining the upper threshold.

.reveal img, .reveal video, .reveal iframe {
  max-width: 95%;
  max-height: 95%;
}

Increasing this in my custom theme solved it for me.