R156: Set Canvas Size Pre-stretch bug

Link to .capx file (required!):

dl.dropboxusercontent.com/u/70562654/CanvasSizeBugRep.capx

Steps to reproduce:

1. Set your screen resolution to any of these:

1024x768

1152x864

1280x1024

1366x768

1600x900

1920x1200

2. Press keyboard key '6' to switch between mode 1: canvas size 340x236/layout scale 1.0 high quality scale, mode 2: 680x472/layout scale 2.0 low quality scale, and mode 3: 340x236/layout scale 1.0 low quality scale

Observed result:

Mode 2: Canvas size 680x472/layout scale 2.0 doesn't stretch to fill the screen, instead it stretches one increment lower (2x instead of 3x). Doesn't happen with all screen resolutions. 1600x1024 and 1600x1200 for instance, will stretch correctly.

Expected result:

Mode 2 should stretch to fill the screen the same way mode 1 and mode 3 do.

Browsers affected:

Chrome: yes/no

Firefox: yes/no

Internet Explorer: yes/no

Operating system & service pack:

Windows 7 64-bit Home Premium Service pack 1

Construct 2 version:

    R156

Can't see any issue here. By putting in a text object to display fullscreen_scale_toggle, it's actually mode 1 that sometimes displays smaller. That makes sense, since you're setting a larger canvas size, so integer scaling that up has fewer options.

Hmm, okay I guess I misunderstood how this works. Thanks for the heads-up. Is there any way to control this so that switching produces a consistent fullscreen stretch size for the integer scale setting? For instance using events to query device resolution and adjust canvas/layout size according to that?

Not really - letterbox integer scale exists to only scale the canvas to integer multiples of the canvas size, so if you set a new size that can only fit at a lower scale, then it's by design that it will just use that size instead.