DeferredLayerUpdater.cpp revision 5e00c7ce063116c11315639f0035aca8ad73e8cc 
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#include "DeferredLayerUpdater.h"
17
18#include "LayerRenderer.h"
19#include "renderthread/EglManager.h"
20#include "renderthread/RenderTask.h"
21#include "utils/PaintUtils.h"
22
23namespace android {
24namespace uirenderer {
25
26DeferredLayerUpdater::DeferredLayerUpdater(Layer* layer)
27        : mSurfaceTexture(nullptr)
28        , mTransform(nullptr)
29        , mNeedsGLContextAttach(false)
30        , mUpdateTexImage(false)
31        , mLayer(layer) {
32    mWidth = mLayer->layer.getWidth();
33    mHeight = mLayer->layer.getHeight();
34    mBlend = mLayer->isBlend();
35    mColorFilter = SkSafeRef(mLayer->getColorFilter());
36    mAlpha = mLayer->getAlpha();
37    mMode = mLayer->getMode();
38}
39
40DeferredLayerUpdater::~DeferredLayerUpdater() {
41    SkSafeUnref(mColorFilter);
42    setTransform(nullptr);
43    mLayer->postDecStrong();
44    mLayer = nullptr;
45}
46
47void DeferredLayerUpdater::setPaint(const SkPaint* paint) {
48    mAlpha = PaintUtils::getAlphaDirect(paint);
49    mMode = PaintUtils::getXfermodeDirect(paint);
50    SkColorFilter* colorFilter = (paint) ? paint->getColorFilter() : nullptr;
51    SkRefCnt_SafeAssign(mColorFilter, colorFilter);
52}
53
54void DeferredLayerUpdater::apply() {
55    mLayer->setColorFilter(mColorFilter);
56    mLayer->setAlpha(mAlpha, mMode);
57
58    if (mSurfaceTexture.get()) {
59        if (mNeedsGLContextAttach) {
60            mNeedsGLContextAttach = false;
61            mSurfaceTexture->attachToContext(mLayer->getTextureId());
62        }
63        if (mUpdateTexImage) {
64            mUpdateTexImage = false;
65            doUpdateTexImage();
66        }
67        if (mTransform) {
68            mLayer->getTransform().load(*mTransform);
69            setTransform(nullptr);
70        }
71    }
72}
73
74void DeferredLayerUpdater::doUpdateTexImage() {
75    if (mSurfaceTexture->updateTexImage() == NO_ERROR) {
76        float transform[16];
77
78        int64_t frameNumber = mSurfaceTexture->getFrameNumber();
79        // If the GLConsumer queue is in synchronous mode, need to discard all
80        // but latest frame, using the frame number to tell when we no longer
81        // have newer frames to target. Since we can't tell which mode it is in,
82        // do this unconditionally.
83        int dropCounter = 0;
84        while (mSurfaceTexture->updateTexImage() == NO_ERROR) {
85            int64_t newFrameNumber = mSurfaceTexture->getFrameNumber();
86            if (newFrameNumber == frameNumber) break;
87            frameNumber = newFrameNumber;
88            dropCounter++;
89        }
90
91        bool forceFilter = false;
92        sp<GraphicBuffer> buffer = mSurfaceTexture->getCurrentBuffer();
93        if (buffer != nullptr) {
94            // force filtration if buffer size != layer size
95            forceFilter = mWidth != static_cast<int>(buffer->getWidth())
96                    || mHeight != static_cast<int>(buffer->getHeight());
97        }
98
99        #if DEBUG_RENDERER
100        if (dropCounter > 0) {
101            RENDERER_LOGD("Dropped %d frames on texture layer update", dropCounter);
102        }
103        #endif
104        mSurfaceTexture->getTransformMatrix(transform);
105        GLenum renderTarget = mSurfaceTexture->getCurrentTextureTarget();
106
107        LOG_ALWAYS_FATAL_IF(renderTarget != GL_TEXTURE_2D && renderTarget != GL_TEXTURE_EXTERNAL_OES,
108                "doUpdateTexImage target %x, 2d %x, EXT %x",
109                renderTarget, GL_TEXTURE_2D, GL_TEXTURE_EXTERNAL_OES);
110        LayerRenderer::updateTextureLayer(mLayer, mWidth, mHeight,
111                !mBlend, forceFilter, renderTarget, transform);
112    }
113}
114
115void DeferredLayerUpdater::detachSurfaceTexture() {
116    if (mSurfaceTexture.get()) {
117        status_t err = mSurfaceTexture->detachFromContext();
118        if (err != 0) {
119            // TODO: Elevate to fatal exception
120            ALOGE("Failed to detach SurfaceTexture from context %d", err);
121        }
122        mSurfaceTexture = nullptr;
123        mLayer->clearTexture();
124    }
125}
126
127} /* namespace uirenderer */
128} /* namespace android */
129