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/*
* 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 android.view;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.CanvasProperty;
import android.graphics.Paint;
import android.graphics.Rect;
/**
* Hardware accelerated canvas.
*
* @hide
*/
public abstract class HardwareCanvas extends Canvas {
/**
* Pass a reference to the native renderer to our superclass's
* constructor.
*/
protected HardwareCanvas(long renderer) {
super(renderer);
}
@Override
public boolean isHardwareAccelerated() {
return true;
}
@Override
public void setBitmap(Bitmap bitmap) {
throw new UnsupportedOperationException();
}
/**
* Invoked before any drawing operation is performed in this canvas.
*
* @param dirty The dirty rectangle to update, can be null.
*
* @hide
*/
public abstract void onPreDraw(Rect dirty);
/**
* Invoked after all drawing operation have been performed.
*
* @hide
*/
public abstract void onPostDraw();
/**
* Draws the specified display list onto this canvas. The display list can only
* be drawn if {@link android.view.RenderNode#isValid()} returns true.
*
* @param renderNode The RenderNode to replay.
*/
public void drawRenderNode(RenderNode renderNode) {
drawRenderNode(renderNode, RenderNode.FLAG_CLIP_CHILDREN);
}
/**
* Draws the specified display list onto this canvas.
*
* @param renderNode The RenderNode to replay.
* @param dirty Ignored, can be null.
* @param flags Optional flags about drawing, see {@link RenderNode} for
* the possible flags.
*
* @hide
*/
public abstract void drawRenderNode(RenderNode renderNode, int flags);
/**
* Draws the specified layer onto this canvas.
*
* @param layer The layer to composite on this canvas
* @param x The left coordinate of the layer
* @param y The top coordinate of the layer
* @param paint The paint used to draw the layer
*
* @hide
*/
abstract void drawHardwareLayer(HardwareLayer layer, float x, float y, Paint paint);
/**
* Calls the function specified with the drawGLFunction function pointer. This is
* functionality used by webkit for calling into their renderer from our display lists.
* This function may return true if an invalidation is needed after the call.
*
* @param drawGLFunction A native function pointer
*
* @hide
*/
public void callDrawGLFunction2(long drawGLFunction) {
// Noop - this is done in the display list recorder subclass
}
public abstract void drawCircle(CanvasProperty<Float> cx, CanvasProperty<Float> cy,
CanvasProperty<Float> radius, CanvasProperty<Paint> paint);
public abstract void drawRoundRect(CanvasProperty<Float> left, CanvasProperty<Float> top,
CanvasProperty<Float> right, CanvasProperty<Float> bottom,
CanvasProperty<Float> rx, CanvasProperty<Float> ry,
CanvasProperty<Paint> paint);
public static void setProperty(String name, String value) {
GLES20Canvas.setProperty(name, value);
}
}
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