DeferredLayerUpdater.h revision 087bc0c14bdccf7c258dce0cdef46a69a839b427 
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
33// Container to hold the properties a layer should be set to at the start
34// of a render pass
35class DeferredLayerUpdater {
36public:
37    // Note that DeferredLayerUpdater assumes it is taking ownership of the layer
38    // and will not call incrementRef on it as a result.
39    ANDROID_API DeferredLayerUpdater(Layer* layer, OpenGLRenderer* renderer = 0);
40    ANDROID_API ~DeferredLayerUpdater();
41
42    ANDROID_API bool setSize(uint32_t width, uint32_t height) {
43        if (mWidth != width || mHeight != height) {
44            mWidth = width;
45            mHeight = height;
46            return true;
47        }
48        return false;
49    }
50
51    ANDROID_API bool setBlend(bool blend) {
52        if (blend != mBlend) {
53            mBlend = blend;
54            return true;
55        }
56        return false;
57    }
58
59    ANDROID_API void setSurfaceTexture(const sp<GLConsumer>& texture, bool needsAttach) {
60        if (texture.get() != mSurfaceTexture.get()) {
61            mNeedsGLContextAttach = needsAttach;
62            mSurfaceTexture = texture;
63        }
64    }
65
66    ANDROID_API void updateTexImage() {
67        mUpdateTexImage = true;
68    }
69
70    ANDROID_API void setTransform(const SkMatrix* matrix) {
71        delete mTransform;
72        mTransform = matrix ? new SkMatrix(*matrix) : 0;
73    }
74
75    ANDROID_API void setDisplayList(RenderNode* displayList,
76                int left, int top, int right, int bottom);
77
78    ANDROID_API void setPaint(const SkPaint* paint);
79
80    ANDROID_API bool apply();
81
82    ANDROID_API Layer* backingLayer() {
83        return mLayer;
84    }
85
86    ANDROID_API Layer* detachBackingLayer() {
87        Layer* layer = mLayer;
88        mLayer = 0;
89        return layer;
90    }
91
92private:
93    // Generic properties
94    uint32_t mWidth;
95    uint32_t mHeight;
96    bool mBlend;
97    SkColorFilter* mColorFilter;
98    int mAlpha;
99    SkXfermode::Mode mMode;
100
101    // Layer type specific properties
102    // displayList and surfaceTexture are mutually exclusive, only 1 may be set
103    // dirtyRect is only valid if displayList is set
104    sp<RenderNode> mDisplayList;
105    Rect mDirtyRect;
106    sp<GLConsumer> mSurfaceTexture;
107    SkMatrix* mTransform;
108    bool mNeedsGLContextAttach;
109    bool mUpdateTexImage;
110
111    Layer* mLayer;
112    Caches& mCaches;
113
114    void doUpdateTexImage();
115};
116
117} /* namespace uirenderer */
118} /* namespace android */
119
120#endif /* DEFERREDLAYERUPDATE_H_ */
121