From 55246d6b4e0b76494fb3c36306a775aa2764b345 Mon Sep 17 00:00:00 2001
From: Nino van Hooff <ninovanhooff@gmail.com>
Date: Sat, 28 Dec 2024 19:26:16 +0100
Subject: [PATCH] ADD getRefreshRate

---
 src/playdate/bindings/display.nim | 11 +++++++----
 src/playdate/display.nim          | 16 +++++++++++++++-
 2 files changed, 22 insertions(+), 5 deletions(-)

diff --git a/src/playdate/bindings/display.nim b/src/playdate/bindings/display.nim
index 26d3527..52a8ade 100644
--- a/src/playdate/bindings/display.nim
+++ b/src/playdate/bindings/display.nim
@@ -4,11 +4,14 @@ import utils
 
 sdktype:
     type PlaydateDisplay* {.importc: "const struct playdate_display", header: "pd_api.h".} = object
+        # directly mapped to C api
         getWidth {.importsdk.}: proc (): cint
         getHeight {.importsdk.}: proc (): cint
-        setRefreshRate {.importsdk.}: proc (rate: cfloat)
-        setInverted {.importc: "setInverted".}: proc (flag: cint) {.cdecl, raises: [].}
         setScale {.importsdk.}: proc (s: cuint)
         setMosaic {.importsdk.}: proc (x: cuint; y: cuint)
-        setFlipped {.importc: "setFlipped".}: proc (x: cint; y: cint) {.cdecl, raises: [].}
-        setOffset {.importsdk.}: proc (x: cint; y: cint)
\ No newline at end of file
+        setOffset* {.importsdk.}: proc (x: cint; y: cint)
+
+        # Called from Nim (src/playdate/display.nim)
+        setRefreshRate {.importc: "setRefreshRate".}: proc (rate: cfloat) {.cdecl, raises: [].}
+        setInverted {.importc: "setInverted".}: proc (flag: cint) {.cdecl, raises: [].}
+        setFlipped {.importc: "setFlipped".}: proc (x: cint; y: cint) {.cdecl, raises: [].}
\ No newline at end of file
diff --git a/src/playdate/display.nim b/src/playdate/display.nim
index 5733c57..56c6d0a 100644
--- a/src/playdate/display.nim
+++ b/src/playdate/display.nim
@@ -9,10 +9,24 @@ export display
 {.hint[DuplicateModuleImport]: off.}
 import bindings/display {.all.}
 
+var 
+    refreshRate = 30f
+        ## bookkeeping variable for refresh rate, because API does not provide a getter.
+        ## Initial value is the rate that is set on device boot
+
 proc setInverted* (this: ptr PlaydateDisplay, inverted: bool) =
     privateAccess(PlaydateDisplay)
     this.setInverted(if inverted: 1 else: 0)
 
 proc setFlipped* (this: ptr PlaydateDisplay, x: bool, y: bool) =
     privateAccess(PlaydateDisplay)
-    this.setFlipped(if x: 1 else: 0, if y: 1 else: 0)
\ No newline at end of file
+    this.setFlipped(if x: 1 else: 0, if y: 1 else: 0)
+
+
+proc getRefreshRate* (this: ptr PlaydateDisplay): float32 =
+    refreshRate
+
+proc setRefreshRate* (this: ptr PlaydateDisplay, rate: float32) =
+    privateAccess(PlaydateDisplay)
+    refreshRate = rate
+    this.setRefreshRate(rate)
\ No newline at end of file