DeferredLayerUpdater.h revision 2dc236b2bae13b9a0ed9b3f7320502aecd7983b3 
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 "renderthread/RenderThread.h"
28
29namespace android {
30namespace uirenderer {
31
32// Container to hold the properties a layer should be set to at the start
33// of a render pass
34class DeferredLayerUpdater : public VirtualLightRefBase {
35public:
36    // Note that DeferredLayerUpdater assumes it is taking ownership of the layer
37    // and will not call incrementRef on it as a result.
38    ANDROID_API DeferredLayerUpdater(renderthread::RenderThread& thread, Layer* layer);
39    ANDROID_API ~DeferredLayerUpdater();
40
41    ANDROID_API bool setSize(uint32_t width, uint32_t height) {
42        if (mWidth != width || mHeight != height) {
43            mWidth = width;
44            mHeight = height;
45            return true;
46        }
47        return false;
48    }
49
50    ANDROID_API bool setBlend(bool blend) {
51        if (blend != mBlend) {
52            mBlend = blend;
53            return true;
54        }
55        return false;
56    }
57
58    ANDROID_API void setSurfaceTexture(const sp<GLConsumer>& texture, bool needsAttach) {
59        if (texture.get() != mSurfaceTexture.get()) {
60            mNeedsGLContextAttach = needsAttach;
61            mSurfaceTexture = texture;
62        }
63    }
64
65    ANDROID_API void updateTexImage() {
66        mUpdateTexImage = true;
67    }
68
69    ANDROID_API void setTransform(const SkMatrix* matrix) {
70        delete mTransform;
71        mTransform = matrix ? new SkMatrix(*matrix) : 0;
72    }
73
74    ANDROID_API void setPaint(const SkPaint* paint);
75
76    ANDROID_API bool apply();
77
78    ANDROID_API Layer* backingLayer() {
79        return mLayer;
80    }
81
82    ANDROID_API void detachSurfaceTexture();
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    renderthread::RenderThread& mRenderThread;
101
102    void doUpdateTexImage();
103};
104
105} /* namespace uirenderer */
106} /* namespace android */
107
108#endif /* DEFERREDLAYERUPDATE_H_ */
109