Call glTexSubImage2D in native code for ImageTexture.Tile

app/src/main/java/com/hippo/gl/glrenderer/NativeTexture.java

@@ -0,0 +1,101 @@
+/*
+ * Copyright 2016 Hippo Seven
+ *
+ * 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.hippo.gl.glrenderer;
+
+import android.opengl.GLES20;
+import android.util.Log;
+
+import javax.microedition.khronos.opengles.GL11;
+
+public abstract class NativeTexture extends BasicTexture {
+
+    private static final String TAG = NativeTexture.class.getSimpleName();
+
+    private boolean mContentValid = true;
+
+    private boolean mOpaque = true;
+
+    public void invalidateContent() {
+        mContentValid = false;
+    }
+
+    public static void checkError() {
+        int error = GLES20.glGetError();
+        if (error != 0) {
+            Throwable t = new Throwable();
+            Log.e(TAG, "GL error: " + error, t);
+        }
+    }
+
+    protected abstract void texImage(boolean init);
+
+    private void uploadToCanvas(GLCanvas canvas) {
+        // Get id
+        mId = canvas.getGLId().generateTexture();
+
+        // Prepare
+        canvas.setTextureParameters(this);
+
+        // Call glTexImage2D
+        GLES20.glBindTexture(getTarget(), mId);
+        checkError();
+        texImage(true);
+
+        setAssociatedCanvas(canvas);
+        mState = STATE_LOADED;
+        mContentValid = true;
+    }
+
+    public void updateContent(GLCanvas canvas) {
+        if (!isLoaded()) {
+            uploadToCanvas(canvas);
+        } else if (!mContentValid) {
+            // Call glTexSubImage2D
+            GLES20.glBindTexture(getTarget(), mId);
+            checkError();
+            texImage(false);
+            mContentValid = true;
+        }
+    }
+
+    /**
+     * Whether the content on GPU is valid.
+     */
+    public boolean isContentValid() {
+        return isLoaded() && mContentValid;
+    }
+
+    @Override
+    protected boolean onBind(GLCanvas canvas) {
+        updateContent(canvas);
+        return isContentValid();
+    }
+
+    @Override
+    protected int getTarget() {
+        return GL11.GL_TEXTURE_2D;
+    }
+
+    public void setOpaque(boolean isOpaque) {
+        mOpaque = isOpaque;
+    }
+
+    @Override
+    public boolean isOpaque() {
+        return mOpaque;
+    }
+}