DeferredLayerUpdater.h revision a39dd595791b41222ab310b5e8a76a64faa8ba5c 
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 "DisplayList.h"
26#include "Layer.h"
27#include "OpenGLRenderer.h"
28#include "Rect.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(DisplayList* displayList,
76                int left, int top, int right, int bottom);
77
78    ANDROID_API void setPaint(const SkPaint* paint) {
79        OpenGLRenderer::getAlphaAndModeDirect(paint, &mAlpha, &mMode);
80    }
81
82    ANDROID_API void setColorFilter(SkColorFilter* colorFilter);
83
84    ANDROID_API bool apply();
85    ANDROID_API void applyDeferred(DeferredLayerUpdater* deferredApply);
86
87    ANDROID_API Layer* backingLayer() {
88        return mLayer;
89    }
90
91    ANDROID_API Layer* detachBackingLayer() {
92        Layer* layer = mLayer;
93        mLayer = 0;
94        return layer;
95    }
96
97private:
98    // Generic properties
99    uint32_t mWidth;
100    uint32_t mHeight;
101    bool mBlend;
102    SkColorFilter* mColorFilter;
103    int mAlpha;
104    SkXfermode::Mode mMode;
105
106    // Layer type specific properties
107    // displayList and surfaceTexture are mutually exclusive, only 1 may be set
108    // dirtyRect is only valid if displayList is set
109    DisplayList* mDisplayList;
110    Rect mDirtyRect;
111    sp<GLConsumer> mSurfaceTexture;
112    SkMatrix* mTransform;
113    bool mNeedsGLContextAttach;
114    bool mUpdateTexImage;
115
116    Layer* mLayer;
117    OpenGLRenderer* mRenderer;
118    Caches& mCaches;
119
120    void doUpdateTexImage();
121};
122
123} /* namespace uirenderer */
124} /* namespace android */
125
126#endif /* DEFERREDLAYERUPDATE_H_ */
127