1 files changed, 88 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/glrenderer/StringTexture.java b/src/com/android/gallery3d/glrenderer/StringTexture.java
new file mode 100644
index 000000000..56ca29753
--- /dev/null
+++ b/src/com/android/gallery3d/glrenderer/StringTexture.java
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.gallery3d.glrenderer;
+
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint.FontMetricsInt;
+import android.graphics.Typeface;
+import android.text.TextPaint;
+import android.text.TextUtils;
+import android.util.FloatMath;
+
+// StringTexture is a texture shows the content of a specified String.
+//
+// To create a StringTexture, use the newInstance() method and specify
+// the String, the font size, and the color.
+public class StringTexture extends CanvasTexture {
+    private final String mText;
+    private final TextPaint mPaint;
+    private final FontMetricsInt mMetrics;
+
+    private StringTexture(String text, TextPaint paint,
+            FontMetricsInt metrics, int width, int height) {
+        super(width, height);
+        mText = text;
+        mPaint = paint;
+        mMetrics = metrics;
+    }
+
+    public static TextPaint getDefaultPaint(float textSize, int color) {
+        TextPaint paint = new TextPaint();
+        paint.setTextSize(textSize);
+        paint.setAntiAlias(true);
+        paint.setColor(color);
+        paint.setShadowLayer(2f, 0f, 0f, Color.BLACK);
+        return paint;
+    }
+
+    public static StringTexture newInstance(
+            String text, float textSize, int color) {
+        return newInstance(text, getDefaultPaint(textSize, color));
+    }
+
+    public static StringTexture newInstance(
+            String text, float textSize, int color,
+            float lengthLimit, boolean isBold) {
+        TextPaint paint = getDefaultPaint(textSize, color);
+        if (isBold) {
+            paint.setTypeface(Typeface.defaultFromStyle(Typeface.BOLD));
+        }
+        if (lengthLimit > 0) {
+            text = TextUtils.ellipsize(
+                    text, paint, lengthLimit, TextUtils.TruncateAt.END).toString();
+        }
+        return newInstance(text, paint);
+    }
+
+    private static StringTexture newInstance(String text, TextPaint paint) {
+        FontMetricsInt metrics = paint.getFontMetricsInt();
+        int width = (int) FloatMath.ceil(paint.measureText(text));
+        int height = metrics.bottom - metrics.top;
+        // The texture size needs to be at least 1x1.
+        if (width <= 0) width = 1;
+        if (height <= 0) height = 1;
+        return new StringTexture(text, paint, metrics, width, height);
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas, Bitmap backing) {
+        canvas.translate(0, -mMetrics.ascent);
+        canvas.drawText(mText, 0, 0, mPaint);
+    }
+}