DeferredLayerUpdater.cpp revision 8cd3edfa15cc9cdbffa935d19ab894426b08d174 
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 "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->getWidth();
33    mHeight = mLayer->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::getBlendModeDirect(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        LOG_ALWAYS_FATAL_IF(mLayer->getApi() != Layer::Api::OpenGL,
60                            "apply surfaceTexture with non GL backend %x, GL %x, VK %x",
61                            mLayer->getApi(), Layer::Api::OpenGL, Layer::Api::Vulkan);
62        if (mNeedsGLContextAttach) {
63            mNeedsGLContextAttach = false;
64            mSurfaceTexture->attachToContext(static_cast<GlLayer*>(mLayer)->getTextureId());
65        }
66        if (mUpdateTexImage) {
67            mUpdateTexImage = false;
68            doUpdateTexImage();
69        }
70        if (mTransform) {
71            mLayer->getTransform().load(*mTransform);
72            setTransform(nullptr);
73        }
74    }
75}
76
77void DeferredLayerUpdater::doUpdateTexImage() {
78    LOG_ALWAYS_FATAL_IF(mLayer->getApi() != Layer::Api::OpenGL,
79                        "doUpdateTexImage non GL backend %x, GL %x, VK %x",
80                        mLayer->getApi(), Layer::Api::OpenGL, Layer::Api::Vulkan);
81    if (mSurfaceTexture->updateTexImage() == NO_ERROR) {
82        float transform[16];
83
84        int64_t frameNumber = mSurfaceTexture->getFrameNumber();
85        // If the GLConsumer queue is in synchronous mode, need to discard all
86        // but latest frame, using the frame number to tell when we no longer
87        // have newer frames to target. Since we can't tell which mode it is in,
88        // do this unconditionally.
89        int dropCounter = 0;
90        while (mSurfaceTexture->updateTexImage() == NO_ERROR) {
91            int64_t newFrameNumber = mSurfaceTexture->getFrameNumber();
92            if (newFrameNumber == frameNumber) break;
93            frameNumber = newFrameNumber;
94            dropCounter++;
95        }
96
97        bool forceFilter = false;
98        sp<GraphicBuffer> buffer = mSurfaceTexture->getCurrentBuffer();
99        if (buffer != nullptr) {
100            // force filtration if buffer size != layer size
101            forceFilter = mWidth != static_cast<int>(buffer->getWidth())
102                    || mHeight != static_cast<int>(buffer->getHeight());
103        }
104
105        #if DEBUG_RENDERER
106        if (dropCounter > 0) {
107            RENDERER_LOGD("Dropped %d frames on texture layer update", dropCounter);
108        }
109        #endif
110        mSurfaceTexture->getTransformMatrix(transform);
111        GLenum renderTarget = mSurfaceTexture->getCurrentTextureTarget();
112
113        LOG_ALWAYS_FATAL_IF(renderTarget != GL_TEXTURE_2D && renderTarget != GL_TEXTURE_EXTERNAL_OES,
114                "doUpdateTexImage target %x, 2d %x, EXT %x",
115                renderTarget, GL_TEXTURE_2D, GL_TEXTURE_EXTERNAL_OES);
116        updateLayer(forceFilter, renderTarget, transform);
117    }
118}
119
120void DeferredLayerUpdater::updateLayer(bool forceFilter, GLenum renderTarget,
121        const float* textureTransform) {
122    LOG_ALWAYS_FATAL_IF(mLayer->getApi() != Layer::Api::OpenGL,
123                        "updateLayer non GL backend %x, GL %x, VK %x",
124                        mLayer->getApi(), Layer::Api::OpenGL, Layer::Api::Vulkan);
125
126    mLayer->setBlend(mBlend);
127    mLayer->setForceFilter(forceFilter);
128    mLayer->setSize(mWidth, mHeight);
129    mLayer->getTexTransform().load(textureTransform);
130
131    GlLayer* glLayer = static_cast<GlLayer*>(mLayer);
132    if (renderTarget != glLayer->getRenderTarget()) {
133        glLayer->setRenderTarget(renderTarget);
134        glLayer->bindTexture();
135        glLayer->setFilter(GL_NEAREST, false, true);
136        glLayer->setWrap(GL_CLAMP_TO_EDGE, false, true);
137    }
138}
139
140void DeferredLayerUpdater::detachSurfaceTexture() {
141    if (mSurfaceTexture.get()) {
142        LOG_ALWAYS_FATAL_IF(mLayer->getApi() != Layer::Api::OpenGL,
143                            "detachSurfaceTexture with non GL backend %x, GL %x, VK %x",
144                            mLayer->getApi(), Layer::Api::OpenGL, Layer::Api::Vulkan);
145        status_t err = mSurfaceTexture->detachFromContext();
146        if (err != 0) {
147            // TODO: Elevate to fatal exception
148            ALOGE("Failed to detach SurfaceTexture from context %d", err);
149        }
150        mSurfaceTexture = nullptr;
151        static_cast<GlLayer*>(mLayer)->clearTexture();
152    }
153}
154
155} /* namespace uirenderer */
156} /* namespace android */
157