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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 "renderthread/RenderThread.h"
     28 
     29 namespace android {
     30 namespace uirenderer {
     31 
     32 // Container to hold the properties a layer should be set to at the start
     33 // of a render pass
     34 class DeferredLayerUpdater : public VirtualLightRefBase {
     35 public:
     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     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 private:
     96     // Generic properties
     97     int mWidth;
     98     int mHeight;
     99     bool mBlend;
    100     SkColorFilter* mColorFilter;
    101     int mAlpha;
    102     SkXfermode::Mode mMode;
    103 
    104     sp<GLConsumer> mSurfaceTexture;
    105     SkMatrix* mTransform;
    106     bool mNeedsGLContextAttach;
    107     bool mUpdateTexImage;
    108 
    109     Layer* mLayer;
    110     Caches& mCaches;
    111 
    112     void doUpdateTexImage();
    113 };
    114 
    115 } /* namespace uirenderer */
    116 } /* namespace android */
    117 
    118 #endif /* DEFERREDLAYERUPDATE_H_ */
    119