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(Switch) Report correct (approximate) DPI in 'docked' mode

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This commit is contained in:
jdgleaver 2020-02-12 14:25:49 +00:00
parent fff9a4f0c5
commit b1773cc73b
1 changed files with 36 additions and 1 deletions
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37
gfx/drivers_context/switch_ctx.c
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@ -303,7 +303,42 @@ bool switch_ctx_get_metrics(void *data,
switch (type)
{
case DISPLAY_METRIC_DPI:
*value = 236.87; /* FIXME: Don't hardcode this value */
/* FIXME: DPI values should be obtained by querying
* the hardware - these hard-coded values are a kludge */
switch (appletGetOperationMode())
{
case AppletOperationMode_Docked:
/* Docked mode
* > Resolution: 1920x1080
* > Screen Size: 39 inch
* - Have to make an assumption here. We select
* a 'default' screen size of 39 inches which
* corresponds to the optimal diagonal screen
* size for HD television as reported in:
* "HDTV displays: subjective effects of scanning
* standards and domestic picture sizes,"
* N. E. Tanton and M. A. Stone,
* BBC Research Department Report 1989/09,
* January 1989
* This agrees with the median recorded TV
* size in:
* "A Survey of UK Television Viewing Conditions,"
* Katy C. Noland and Louise H. Truong,
* BBC R&D White Paper WHP 287 January 2015
* > DPI: sqrt((1920 * 1920) + (1080 * 1080)) / 39
*/
*value = 56.48480f;
break;
case AppletOperationMode_Handheld:
default:
/* Handheld mode
* > Resolution: 1280x720
* > Screen size: 6.2 inch
* > DPI: sqrt((1280 * 1280) + (720 * 720)) / 6.2
*/
*value = 236.8717f;
break;
}
return true;
default:
break;