GX.games: add ability to interpolate canvas during tests

[gnysek]

Is your feature request related to a problem?

Currently GX.Games exporter allows to set interpolation between pixels like other exporters, but, since HTML5 <canvas> is also resized in most of cases, whole game is still distorted, until there's image-rendering: smooth; added in CSS for <canvas> element.

This is checkbox which does that, but only for published games: There's no way to do such thing when testing locally (especially if game runs in default browser instead of Opera GX), and requires updating CSS every time, manually. This is very time consuming.

Examples:

<canvas> with default, settings:

• gpu interpolation off (gpu_set_tex_filter(false)):
• gpu interpolation ON (scaled images are blurred, but because of canvas resize they are distorted):

<canvas> with image-rendering: smooth;, settings:

• gpu interpolation off:
• gpu interpolation ON:

Describe the solution you'd like

a) Ability to enable canvas interpolation from IDE b) Ability to use custom index.html file same as for HTML5

Describe alternatives you've considered

New function, which allows to change that in-game:

gx_set_canvas_rendering([bool]) - whether to turn image-rendering: smooth; or image-rendering: pixel, by constants:

• gx_canvas_rendering_smooth = true
• gx_canvas_rendering_pixel = false.

Additional context

No response

[gnysek]

I've just added gx_set_canvas_rendering proposal in Describe alternatives you've considered section.