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 "OpenGLRenderer.h"
19
20#include "LayerRenderer.h"
21#include "renderthread/EglManager.h"
22#include "renderthread/RenderTask.h"
23
24namespace android {
25namespace uirenderer {
26
27DeferredLayerUpdater::DeferredLayerUpdater(Layer* layer)
28        : mSurfaceTexture(nullptr)
29        , mTransform(nullptr)
30        , mNeedsGLContextAttach(false)
31        , mUpdateTexImage(false)
32        , mLayer(layer)
33        , mCaches(Caches::getInstance()) {
34    mWidth = mLayer->layer.getWidth();
35    mHeight = mLayer->layer.getHeight();
36    mBlend = mLayer->isBlend();
37    mColorFilter = SkSafeRef(mLayer->getColorFilter());
38    mAlpha = mLayer->getAlpha();
39    mMode = mLayer->getMode();
40}
41
42DeferredLayerUpdater::~DeferredLayerUpdater() {
43    SkSafeUnref(mColorFilter);
44    setTransform(nullptr);
45    mLayer->postDecStrong();
46    mLayer = nullptr;
47}
48
49void DeferredLayerUpdater::setPaint(const SkPaint* paint) {
50    mAlpha = PaintUtils::getAlphaDirect(paint);
51    mMode = PaintUtils::getXfermodeDirect(paint);
52    SkColorFilter* colorFilter = (paint) ? paint->getColorFilter() : nullptr;
53    SkRefCnt_SafeAssign(mColorFilter, colorFilter);
54}
55
56void DeferredLayerUpdater::apply() {
57    // These properties are applied the same to both layer types
58    mLayer->setColorFilter(mColorFilter);
59    mLayer->setAlpha(mAlpha, mMode);
60
61    if (mSurfaceTexture.get()) {
62        if (mNeedsGLContextAttach) {
63            mNeedsGLContextAttach = false;
64            mSurfaceTexture->attachToContext(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    if (mSurfaceTexture->updateTexImage() == NO_ERROR) {
79        float transform[16];
80
81        int64_t frameNumber = mSurfaceTexture->getFrameNumber();
82        // If the GLConsumer queue is in synchronous mode, need to discard all
83        // but latest frame, using the frame number to tell when we no longer
84        // have newer frames to target. Since we can't tell which mode it is in,
85        // do this unconditionally.
86        int dropCounter = 0;
87        while (mSurfaceTexture->updateTexImage() == NO_ERROR) {
88            int64_t newFrameNumber = mSurfaceTexture->getFrameNumber();
89            if (newFrameNumber == frameNumber) break;
90            frameNumber = newFrameNumber;
91            dropCounter++;
92        }
93
94        bool forceFilter = false;
95        sp<GraphicBuffer> buffer = mSurfaceTexture->getCurrentBuffer();
96        if (buffer != nullptr) {
97            // force filtration if buffer size != layer size
98            forceFilter = mWidth != static_cast<int>(buffer->getWidth())
99                    || mHeight != static_cast<int>(buffer->getHeight());
100        }
101
102        #if DEBUG_RENDERER
103        if (dropCounter > 0) {
104            RENDERER_LOGD("Dropped %d frames on texture layer update", dropCounter);
105        }
106        #endif
107        mSurfaceTexture->getTransformMatrix(transform);
108        GLenum renderTarget = mSurfaceTexture->getCurrentTextureTarget();
109
110        LOG_ALWAYS_FATAL_IF(renderTarget != GL_TEXTURE_2D && renderTarget != GL_TEXTURE_EXTERNAL_OES,
111                "doUpdateTexImage target %x, 2d %x, EXT %x",
112                renderTarget, GL_TEXTURE_2D, GL_TEXTURE_EXTERNAL_OES);
113        LayerRenderer::updateTextureLayer(mLayer, mWidth, mHeight,
114                !mBlend, forceFilter, renderTarget, transform);
115    }
116}
117
118void DeferredLayerUpdater::detachSurfaceTexture() {
119    if (mSurfaceTexture.get()) {
120        status_t err = mSurfaceTexture->detachFromContext();
121        if (err != 0) {
122            // TODO: Elevate to fatal exception
123            ALOGE("Failed to detach SurfaceTexture from context %d", err);
124        }
125        mSurfaceTexture = nullptr;
126        mLayer->clearTexture();
127    }
128}
129
130} /* namespace uirenderer */
131} /* namespace android */
132