Home | History | Annotate | Download | only in hwui 
      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(renderthread::RenderThread& thread, 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     ANDROID_API bool apply();
     81 
     82     Layer* backingLayer() {
     83         return mLayer;
     84     }
     85 
     86     ANDROID_API void detachSurfaceTexture();
     87 
     88 private:
     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     renderthread::RenderThread& mRenderThread;
    105 
    106     void doUpdateTexImage();
    107 };
    108 
    109 } /* namespace uirenderer */
    110 } /* namespace android */
    111 
    112 #endif /* DEFERREDLAYERUPDATE_H_ */
    113