8247772: Lanai: Several jtreg tests fails with assertion validateText…

src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLGraphicsConfig.h

@@ -77,4 +77,10 @@ typedef struct _MTLGraphicsConfigInfo {
     MTLContext          *context;
 } MTLGraphicsConfigInfo;
 
+// From "Metal Feature Set Tables"
+// There are 2 GPU families for mac - MTLGPUFamilyMac1 and MTLGPUFamilyMac2
+// Both of them support "Maximum 2D texture width and height" of 16384 pixels
+// Note : there is no API to get this value, hence hardcoding by reading from the table
+#define MaxTextureSize 16384
+
 #endif /* MTLGraphicsConfig_h_Included */

src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLGraphicsConfig.m

@@ -218,11 +218,5 @@ + (void) _getMTLConfigInfo: (NSMutableArray *)argValue {
 {
     J2dTraceLn(J2D_TRACE_INFO, "MTLGraphicsConfig_nativeGetMaxTextureSize");
 
-    // From "Metal Feature Set Tables"
-    // There are 2 GPU families for mac - MTLGPUFamilyMac1 and MTLGPUFamilyMac2
-    // Both of them support "Maximum 2D texture width and height" of 16384 pixels
-    // Note : there is no API to get this value, hence hardcoding by reading from the table
-    __block int max = 16384;
-
-    return (jint)max;
+    return (jint)MaxTextureSize;
 }

src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLSurfaceData.m

@@ -68,6 +68,9 @@ static jboolean MTLSurfaceData_initTexture(BMTLSDOps *bmtlsdo, jboolean isOpaque
 
         MTLContext* ctx = mtlsdo->configInfo->context;
 
+        if (width > MaxTextureSize) {
+            width = MaxTextureSize;
+        }
         MTLTextureDescriptor *textureDescriptor = [MTLTextureDescriptor texture2DDescriptorWithPixelFormat: MTLPixelFormatBGRA8Unorm width: width height: height mipmapped: NO];
         textureDescriptor.usage = MTLTextureUsageUnknown;
         bmtlsdo->pTexture = [ctx.device newTextureWithDescriptor: textureDescriptor];