DeferredLayerUpdater.cpp revision 00eb43dbc04083eab85fbb1a9589e2548f2004ed 
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 "GlLayer.h"
19#include "VkLayer.h"
20#include "renderstate/RenderState.h"
21#include "renderthread/EglManager.h"
22#include "renderthread/RenderTask.h"
23#include "utils/PaintUtils.h"
24
25namespace android {
26namespace uirenderer {
27
28DeferredLayerUpdater::DeferredLayerUpdater(RenderState& renderState, CreateLayerFn createLayerFn,
29        Layer::Api layerApi)
30        : mRenderState(renderState)
31        , mBlend(false)
32        , mSurfaceTexture(nullptr)
33        , mTransform(nullptr)
34        , mGLContextAttached(false)
35        , mUpdateTexImage(false)
36        , mLayer(nullptr)
37        , mLayerApi(layerApi)
38        , mCreateLayerFn(createLayerFn) {
39    renderState.registerDeferredLayerUpdater(this);
40}
41
42DeferredLayerUpdater::~DeferredLayerUpdater() {
43    SkSafeUnref(mColorFilter);
44    setTransform(nullptr);
45    mRenderState.unregisterDeferredLayerUpdater(this);
46    destroyLayer();
47}
48
49void DeferredLayerUpdater::destroyLayer() {
50    if (!mLayer) {
51        return;
52    }
53
54    if (mSurfaceTexture.get() && mLayerApi == Layer::Api::OpenGL && mGLContextAttached) {
55        status_t err = mSurfaceTexture->detachFromContext();
56        mGLContextAttached = false;
57        if (err != 0) {
58            // TODO: Elevate to fatal exception
59            ALOGE("Failed to detach SurfaceTexture from context %d", err);
60        }
61    }
62
63    mLayer->postDecStrong();
64    mLayer = nullptr;
65}
66
67void DeferredLayerUpdater::setPaint(const SkPaint* paint) {
68    mAlpha = PaintUtils::getAlphaDirect(paint);
69    mMode = PaintUtils::getBlendModeDirect(paint);
70    SkColorFilter* colorFilter = (paint) ? paint->getColorFilter() : nullptr;
71    SkRefCnt_SafeAssign(mColorFilter, colorFilter);
72}
73
74void DeferredLayerUpdater::apply() {
75    if (!mLayer) {
76        mLayer = mCreateLayerFn(mRenderState, mWidth, mHeight, mColorFilter, mAlpha, mMode, mBlend);
77    }
78
79    mLayer->setColorFilter(mColorFilter);
80    mLayer->setAlpha(mAlpha, mMode);
81
82    if (mSurfaceTexture.get()) {
83        if (mLayer->getApi() == Layer::Api::Vulkan) {
84            if (mUpdateTexImage) {
85                mUpdateTexImage = false;
86                doUpdateVkTexImage();
87            }
88        } else {
89            LOG_ALWAYS_FATAL_IF(mLayer->getApi() != Layer::Api::OpenGL,
90                                "apply surfaceTexture with non GL backend %x, GL %x, VK %x",
91                                mLayer->getApi(), Layer::Api::OpenGL, Layer::Api::Vulkan);
92            if (!mGLContextAttached) {
93                mGLContextAttached = true;
94                mUpdateTexImage = true;
95                mSurfaceTexture->attachToContext(static_cast<GlLayer*>(mLayer)->getTextureId());
96            }
97            if (mUpdateTexImage) {
98                mUpdateTexImage = false;
99                doUpdateTexImage();
100            }
101        }
102        if (mTransform) {
103            mLayer->getTransform().load(*mTransform);
104            setTransform(nullptr);
105        }
106    }
107}
108
109void DeferredLayerUpdater::doUpdateTexImage() {
110    LOG_ALWAYS_FATAL_IF(mLayer->getApi() != Layer::Api::OpenGL,
111                        "doUpdateTexImage non GL backend %x, GL %x, VK %x",
112                        mLayer->getApi(), Layer::Api::OpenGL, Layer::Api::Vulkan);
113    if (mSurfaceTexture->updateTexImage() == NO_ERROR) {
114        float transform[16];
115
116        int64_t frameNumber = mSurfaceTexture->getFrameNumber();
117        // If the GLConsumer queue is in synchronous mode, need to discard all
118        // but latest frame, using the frame number to tell when we no longer
119        // have newer frames to target. Since we can't tell which mode it is in,
120        // do this unconditionally.
121        int dropCounter = 0;
122        while (mSurfaceTexture->updateTexImage() == NO_ERROR) {
123            int64_t newFrameNumber = mSurfaceTexture->getFrameNumber();
124            if (newFrameNumber == frameNumber) break;
125            frameNumber = newFrameNumber;
126            dropCounter++;
127        }
128
129        bool forceFilter = false;
130        sp<GraphicBuffer> buffer = mSurfaceTexture->getCurrentBuffer();
131        if (buffer != nullptr) {
132            // force filtration if buffer size != layer size
133            forceFilter = mWidth != static_cast<int>(buffer->getWidth())
134                    || mHeight != static_cast<int>(buffer->getHeight());
135        }
136
137        #if DEBUG_RENDERER
138        if (dropCounter > 0) {
139            RENDERER_LOGD("Dropped %d frames on texture layer update", dropCounter);
140        }
141        #endif
142        mSurfaceTexture->getTransformMatrix(transform);
143        GLenum renderTarget = mSurfaceTexture->getCurrentTextureTarget();
144
145        LOG_ALWAYS_FATAL_IF(renderTarget != GL_TEXTURE_2D && renderTarget != GL_TEXTURE_EXTERNAL_OES,
146                "doUpdateTexImage target %x, 2d %x, EXT %x",
147                renderTarget, GL_TEXTURE_2D, GL_TEXTURE_EXTERNAL_OES);
148        updateLayer(forceFilter, renderTarget, transform);
149    }
150}
151
152void DeferredLayerUpdater::doUpdateVkTexImage() {
153    LOG_ALWAYS_FATAL_IF(mLayer->getApi() != Layer::Api::Vulkan,
154                        "updateLayer non Vulkan backend %x, GL %x, VK %x",
155                        mLayer->getApi(), Layer::Api::OpenGL, Layer::Api::Vulkan);
156
157    static const mat4 identityMatrix;
158    updateLayer(false, GL_NONE, identityMatrix.data);
159
160    VkLayer* vkLayer = static_cast<VkLayer*>(mLayer);
161    vkLayer->updateTexture();
162}
163
164void DeferredLayerUpdater::updateLayer(bool forceFilter, GLenum renderTarget,
165        const float* textureTransform) {
166    mLayer->setBlend(mBlend);
167    mLayer->setForceFilter(forceFilter);
168    mLayer->setSize(mWidth, mHeight);
169    mLayer->getTexTransform().load(textureTransform);
170
171    if (mLayer->getApi() == Layer::Api::OpenGL) {
172        GlLayer* glLayer = static_cast<GlLayer*>(mLayer);
173        if (renderTarget != glLayer->getRenderTarget()) {
174            glLayer->setRenderTarget(renderTarget);
175            glLayer->bindTexture();
176            glLayer->setFilter(GL_NEAREST, false, true);
177            glLayer->setWrap(GL_CLAMP_TO_EDGE, false, true);
178        }
179    }
180}
181
182void DeferredLayerUpdater::detachSurfaceTexture() {
183    if (mSurfaceTexture.get()) {
184        destroyLayer();
185        mSurfaceTexture = nullptr;
186    }
187}
188
189} /* namespace uirenderer */
190} /* namespace android */
191