Debug: max. texture size

app/src/main/java/eu/faircode/email/DebugHelper.java

@@ -470,6 +470,7 @@ public class DebugHelper {
         float density = context.getResources().getDisplayMetrics().density;
         sb.append(String.format("Density 1dp=%f\r\n", density));
         sb.append(String.format("Resolution: %.2f x %.2f dp\r\n", dim.x / density, dim.y / density));
+        sb.append(String.format("Max. texture=%d\r\n", Helper.getMaxTextureSize()));
 
         Configuration config = context.getResources().getConfiguration();
 

app/src/main/java/eu/faircode/email/Helper.java

@@ -186,6 +186,10 @@ import java.util.regex.Pattern;
 
 import javax.mail.internet.ContentType;
 import javax.mail.internet.ParseException;
+import javax.microedition.khronos.egl.EGL10;
+import javax.microedition.khronos.egl.EGLConfig;
+import javax.microedition.khronos.egl.EGLContext;
+import javax.microedition.khronos.egl.EGLDisplay;
 
 public class Helper {
     private static Integer targetSdk = null;
@@ -920,6 +924,35 @@ public class Helper {
 
     // View
 
+    static int getMaxTextureSize() {
+        int max = -1;
+        try {
+            EGL10 egl = (EGL10) EGLContext.getEGL();
+            EGLDisplay d = egl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
+
+            int[] version = new int[2];
+            egl.eglInitialize(d, version);
+
+            int[] count = new int[1];
+            egl.eglGetConfigs(d, null, 0, count);
+
+            EGLConfig[] configs = new EGLConfig[count[0]];
+            egl.eglGetConfigs(d, configs, count[0], count);
+
+            int[] textureSizeWidth = new int[1];
+
+            for (int i = 0; i < count[0]; i++) {
+                egl.eglGetConfigAttrib(d, configs[i], EGL10.EGL_MAX_PBUFFER_WIDTH, textureSizeWidth);
+                if (textureSizeWidth[0] > max)
+                    max = textureSizeWidth[0];
+            }
+        } catch (Throwable ex) {
+            Log.e(ex);
+        }
+
+        return max;
+    }
+
     static int getActionBarHeight(Context context) {
         return Helper.dp2pixels(context, 56);
     }