DeferredLayerUpdater.h revision 260ab726486317496bc12a57d599ea96dcde3284 
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
17#pragma once
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 explicit 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    int getWidth() { return mWidth; }
51    int getHeight() { return mHeight; }
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            GLenum target = texture->getCurrentTextureTarget();
67            LOG_ALWAYS_FATAL_IF(target != GL_TEXTURE_2D && target != GL_TEXTURE_EXTERNAL_OES,
68                    "set unsupported GLConsumer with target %x", target);
69        }
70    }
71
72    ANDROID_API void updateTexImage() {
73        mUpdateTexImage = true;
74    }
75
76    ANDROID_API void setTransform(const SkMatrix* matrix) {
77        delete mTransform;
78        mTransform = matrix ? new SkMatrix(*matrix) : nullptr;
79    }
80
81    SkMatrix* getTransform() {
82        return mTransform;
83    }
84
85    ANDROID_API void setPaint(const SkPaint* paint);
86
87    void apply();
88
89    Layer* backingLayer() {
90        return mLayer;
91    }
92
93    void detachSurfaceTexture();
94
95    void updateLayer(bool forceFilter, GLenum renderTarget, const float* textureTransform);
96
97private:
98    // Generic properties
99    int mWidth;
100    int mHeight;
101    bool mBlend;
102    SkColorFilter* mColorFilter;
103    int mAlpha;
104    SkBlendMode mMode;
105    sp<GLConsumer> mSurfaceTexture;
106    SkMatrix* mTransform;
107    bool mNeedsGLContextAttach;
108    bool mUpdateTexImage;
109
110    Layer* mLayer;
111
112    void doUpdateTexImage();
113};
114
115} /* namespace uirenderer */
116} /* namespace android */
117