Add TextView

app/src/main/java/com/hippo/ehviewer/gallery/ui/TextView.java

@@ -0,0 +1,44 @@
+package com.hippo.ehviewer.gallery.ui;
+
+import com.hippo.ehviewer.gallery.glrenderer.GLCanvas;
+import com.hippo.ehviewer.gallery.glrenderer.TextTexture;
+
+public class TextView extends GLView {
+
+    TextTexture mTextTexture;
+
+    private String mText = "";
+
+    public TextView(TextTexture textTexture) {
+        mTextTexture = textTexture;
+    }
+
+    public void setText(String text) {
+        if (text == null) {
+            text = "";
+        }
+        if (!text.equals(mText)) {
+            mText = text;
+            requestLayout();
+        }
+    }
+
+    @Override
+    protected void onMeasure(int widthSpec, int heightSpec) {
+        int textWidth = 0;
+        int textHight = 0;
+
+        if (mTextTexture != null) {
+            textWidth = (int) mTextTexture.getTextWidth(mText);
+            textHight = (int) mTextTexture.getTextHeight(mText);
+        }
+
+        setMeasuredSize(getDefaultSize(Math.max(getMinimumWidth(), textWidth), widthSpec),
+                getDefaultSize(Math.max(getMinimumHeight(), textHight), heightSpec));
+    }
+
+    @Override
+    protected void onRender(GLCanvas canvas) {
+        mTextTexture.drawText(canvas, mText, 0, 0);
+    }
+}