DeferredLayerUpdater.h revision d2dfd8f128b632ed99418ab2b32949c939a9a369 
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(Layer* layer);
39    ANDROID_API ~DeferredLayerUpdater();
40
41    ANDROID_API bool setSize(int width, int 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            GLenum target = texture->getCurrentTextureTarget();
64            LOG_ALWAYS_FATAL_IF(target != GL_TEXTURE_2D && target != GL_TEXTURE_EXTERNAL_OES,
65                    "set unsupported GLConsumer with target %x", target);
66        }
67    }
68
69    ANDROID_API void updateTexImage() {
70        mUpdateTexImage = true;
71    }
72
73    ANDROID_API void setTransform(const SkMatrix* matrix) {
74        delete mTransform;
75        mTransform = matrix ? new SkMatrix(*matrix) : nullptr;
76    }
77
78    ANDROID_API void setPaint(const SkPaint* paint);
79
80    void apply();
81
82    Layer* backingLayer() {
83        return mLayer;
84    }
85
86    void detachSurfaceTexture();
87
88private:
89    // Generic properties
90    int mWidth;
91    int mHeight;
92    bool mBlend;
93    SkColorFilter* mColorFilter;
94    int mAlpha;
95    SkXfermode::Mode mMode;
96
97    sp<GLConsumer> mSurfaceTexture;
98    SkMatrix* mTransform;
99    bool mNeedsGLContextAttach;
100    bool mUpdateTexImage;
101
102    Layer* mLayer;
103    Caches& mCaches;
104
105    void doUpdateTexImage();
106};
107
108} /* namespace uirenderer */
109} /* namespace android */
110
111#endif /* DEFERREDLAYERUPDATE_H_ */
112