DeferredLayerUpdater.h revision 25fbb3fa1138675379102a44405852555cefccbd 
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 "OpenGLRenderer.h"
27#include "Rect.h"
28#include "RenderNode.h"
29
30namespace android {
31namespace uirenderer {
32
33typedef void (*LayerDestroyer)(Layer* layer);
34
35// Container to hold the properties a layer should be set to at the start
36// of a render pass
37class DeferredLayerUpdater : public VirtualLightRefBase {
38public:
39    // Note that DeferredLayerUpdater assumes it is taking ownership of the layer
40    // and will not call incrementRef on it as a result.
41    ANDROID_API DeferredLayerUpdater(Layer* layer, LayerDestroyer = 0);
42    ANDROID_API ~DeferredLayerUpdater();
43
44    ANDROID_API bool setSize(uint32_t width, uint32_t height) {
45        if (mWidth != width || mHeight != height) {
46            mWidth = width;
47            mHeight = height;
48            return true;
49        }
50        return false;
51    }
52
53    ANDROID_API bool setBlend(bool blend) {
54        if (blend != mBlend) {
55            mBlend = blend;
56            return true;
57        }
58        return false;
59    }
60
61    ANDROID_API void setSurfaceTexture(const sp<GLConsumer>& texture, bool needsAttach) {
62        if (texture.get() != mSurfaceTexture.get()) {
63            mNeedsGLContextAttach = needsAttach;
64            mSurfaceTexture = texture;
65        }
66    }
67
68    ANDROID_API void updateTexImage() {
69        mUpdateTexImage = true;
70    }
71
72    ANDROID_API void setTransform(const SkMatrix* matrix) {
73        delete mTransform;
74        mTransform = matrix ? new SkMatrix(*matrix) : 0;
75    }
76
77    ANDROID_API void setPaint(const SkPaint* paint);
78
79    ANDROID_API bool apply(TreeInfo& info);
80
81    ANDROID_API Layer* backingLayer() {
82        return mLayer;
83    }
84
85private:
86    // Generic properties
87    uint32_t mWidth;
88    uint32_t mHeight;
89    bool mBlend;
90    SkColorFilter* mColorFilter;
91    int mAlpha;
92    SkXfermode::Mode mMode;
93
94    sp<GLConsumer> mSurfaceTexture;
95    SkMatrix* mTransform;
96    bool mNeedsGLContextAttach;
97    bool mUpdateTexImage;
98
99    Layer* mLayer;
100    Caches& mCaches;
101
102    LayerDestroyer mDestroyer;
103
104    void doUpdateTexImage();
105};
106
107} /* namespace uirenderer */
108} /* namespace android */
109
110#endif /* DEFERREDLAYERUPDATE_H_ */
111