Fix: prevent artefacts from appearing on the screen during a SCROLL_LEFT.

aentinger · aentinger · commit 31959c3ea07f · 2024-01-09T09:09:04.000+01:00
This fixes #226.
diff --git a/libraries/Arduino_LED_Matrix/src/Arduino_LED_Matrix.h b/libraries/Arduino_LED_Matrix/src/Arduino_LED_Matrix.h
@@ -250,7 +250,7 @@ class ArduinoLEDMatrix
 
 #ifdef MATRIX_WITH_ARDUINOGRAPHICS
     virtual void set(int x, int y, uint8_t r, uint8_t g, uint8_t b) {
-      if (y >= canvasHeight || x >= canvasWidth) {
+      if (y >= canvasHeight || x >= canvasWidth || y < 0 || x < 0) {
         return;
       }
       // the r parameter is (mis)used to set the character to draw with

Original file line number	Diff line number	Diff line change
`@@ -250,7 +250,7 @@ class ArduinoLEDMatrix`
`250`	`250`
`251`	`251`	`#ifdef MATRIX_WITH_ARDUINOGRAPHICS`
`252`	`252`	`virtual void set(int x, int y, uint8_t r, uint8_t g, uint8_t b) {`
`253`		`- if (y >= canvasHeight \|\| x >= canvasWidth) {`
	`253`	`+ if (y >= canvasHeight \|\| x >= canvasWidth \|\| y < 0 \|\| x < 0) {`
`254`	`254`	`return;`
`255`	`255`	`}`
`256`	`256`	`// the r parameter is (mis)used to set the character to draw with`