DeferredLayerUpdater.h revision 3b20251a355c88193c439f928a84ae69483fb488 
1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16#ifndef DEFERREDLAYERUPDATE_H_
17#define DEFERREDLAYERUPDATE_H_
18
19#include <cutils/compiler.h>
20#include <gui/GLConsumer.h>
21#include <SkColorFilter.h>
22#include <SkMatrix.h>
23#include <utils/StrongPointer.h>
24
25#include "Layer.h"
26#include "Rect.h"
27#include "RenderNode.h"
28
29namespace android {
30namespace uirenderer {
31
32typedef void (*LayerDestroyer)(Layer* layer);
33
34// Container to hold the properties a layer should be set to at the start
35// of a render pass
36class DeferredLayerUpdater : public VirtualLightRefBase {
37public:
38    // Note that DeferredLayerUpdater assumes it is taking ownership of the layer
39    // and will not call incrementRef on it as a result.
40    ANDROID_API DeferredLayerUpdater(Layer* layer, LayerDestroyer = 0);
41    ANDROID_API ~DeferredLayerUpdater();
42
43    ANDROID_API bool setSize(uint32_t width, uint32_t height) {
44        if (mWidth != width || mHeight != height) {
45            mWidth = width;
46            mHeight = height;
47            return true;
48        }
49        return false;
50    }
51
52    ANDROID_API bool setBlend(bool blend) {
53        if (blend != mBlend) {
54            mBlend = blend;
55            return true;
56        }
57        return false;
58    }
59
60    ANDROID_API void setSurfaceTexture(const sp<GLConsumer>& texture, bool needsAttach) {
61        if (texture.get() != mSurfaceTexture.get()) {
62            mNeedsGLContextAttach = needsAttach;
63            mSurfaceTexture = texture;
64        }
65    }
66
67    ANDROID_API void updateTexImage() {
68        mUpdateTexImage = true;
69    }
70
71    ANDROID_API void setTransform(const SkMatrix* matrix) {
72        delete mTransform;
73        mTransform = matrix ? new SkMatrix(*matrix) : 0;
74    }
75
76    ANDROID_API void setPaint(const SkPaint* paint);
77
78    ANDROID_API bool apply(TreeInfo& info);
79
80    ANDROID_API Layer* backingLayer() {
81        return mLayer;
82    }
83
84private:
85    // Generic properties
86    uint32_t mWidth;
87    uint32_t mHeight;
88    bool mBlend;
89    SkColorFilter* mColorFilter;
90    int mAlpha;
91    SkXfermode::Mode mMode;
92
93    sp<GLConsumer> mSurfaceTexture;
94    SkMatrix* mTransform;
95    bool mNeedsGLContextAttach;
96    bool mUpdateTexImage;
97
98    Layer* mLayer;
99    Caches& mCaches;
100
101    LayerDestroyer mDestroyer;
102
103    void doUpdateTexImage();
104};
105
106} /* namespace uirenderer */
107} /* namespace android */
108
109#endif /* DEFERREDLAYERUPDATE_H_ */
110