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      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 "RenderNode.h"
     28 #include "renderthread/RenderThread.h"
     29 
     30 namespace android {
     31 namespace uirenderer {
     32 
     33 // Container to hold the properties a layer should be set to at the start
     34 // of a render pass
     35 class DeferredLayerUpdater : public VirtualLightRefBase {
     36 public:
     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(renderthread::RenderThread& thread, Layer* layer);
     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 setPaint(const SkPaint* paint);
     76 
     77     ANDROID_API bool apply();
     78 
     79     ANDROID_API Layer* backingLayer() {
     80         return mLayer;
     81     }
     82 
     83     ANDROID_API void detachSurfaceTexture();
     84 
     85 private:
     86     // Generic properties
     87     uint32_t mWidth;
     88     uint32_t mHeight;
     89     bool mBlend;
     90     SkColorFilter* mColorFilter;
     91     int mAlpha;
     92     SkXfermode::Mode mMode;
     93 
     94     sp<GLConsumer> mSurfaceTexture;
     95     SkMatrix* mTransform;
     96     bool mNeedsGLContextAttach;
     97     bool mUpdateTexImage;
     98 
     99     Layer* mLayer;
    100     Caches& mCaches;
    101     renderthread::RenderThread& mRenderThread;
    102 
    103     void doUpdateTexImage();
    104 };
    105 
    106 } /* namespace uirenderer */
    107 } /* namespace android */
    108 
    109 #endif /* DEFERREDLAYERUPDATE_H_ */
    110