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(renderthread::RenderThread& thread, Layer* layer)
28        : mSurfaceTexture(0)
29        , mTransform(0)
30        , mNeedsGLContextAttach(false)
31        , mUpdateTexImage(false)
32        , mLayer(layer)
33        , mCaches(Caches::getInstance())
34        , mRenderThread(thread) {
35    mWidth = mLayer->layer.getWidth();
36    mHeight = mLayer->layer.getHeight();
37    mBlend = mLayer->isBlend();
38    mColorFilter = SkSafeRef(mLayer->getColorFilter());
39    mAlpha = mLayer->getAlpha();
40    mMode = mLayer->getMode();
41}
42
43DeferredLayerUpdater::~DeferredLayerUpdater() {
44    SkSafeUnref(mColorFilter);
45    setTransform(0);
46    mLayer->postDecStrong();
47    mLayer = 0;
48}
49
50void DeferredLayerUpdater::setPaint(const SkPaint* paint) {
51    OpenGLRenderer::getAlphaAndModeDirect(paint, &mAlpha, &mMode);
52    SkColorFilter* colorFilter = (paint) ? paint->getColorFilter() : NULL;
53    SkRefCnt_SafeAssign(mColorFilter, colorFilter);
54}
55
56bool DeferredLayerUpdater::apply() {
57    bool success = true;
58    // These properties are applied the same to both layer types
59    mLayer->setColorFilter(mColorFilter);
60    mLayer->setAlpha(mAlpha, mMode);
61
62    if (mSurfaceTexture.get()) {
63        if (mNeedsGLContextAttach) {
64            mNeedsGLContextAttach = false;
65            mSurfaceTexture->attachToContext(mLayer->getTexture());
66        }
67        if (mUpdateTexImage) {
68            mUpdateTexImage = false;
69            doUpdateTexImage();
70        }
71        if (mTransform) {
72            mLayer->getTransform().load(*mTransform);
73            setTransform(0);
74        }
75    }
76    return success;
77}
78
79void DeferredLayerUpdater::doUpdateTexImage() {
80    if (mSurfaceTexture->updateTexImage() == NO_ERROR) {
81        float transform[16];
82
83        int64_t frameNumber = mSurfaceTexture->getFrameNumber();
84        // If the GLConsumer queue is in synchronous mode, need to discard all
85        // but latest frame, using the frame number to tell when we no longer
86        // have newer frames to target. Since we can't tell which mode it is in,
87        // do this unconditionally.
88        int dropCounter = 0;
89        while (mSurfaceTexture->updateTexImage() == NO_ERROR) {
90            int64_t newFrameNumber = mSurfaceTexture->getFrameNumber();
91            if (newFrameNumber == frameNumber) break;
92            frameNumber = newFrameNumber;
93            dropCounter++;
94        }
95
96        bool forceFilter = false;
97        sp<GraphicBuffer> buffer = mSurfaceTexture->getCurrentBuffer();
98        if (buffer != NULL) {
99            // force filtration if buffer size != layer size
100            forceFilter = mWidth != buffer->getWidth()
101                    || mHeight != buffer->getHeight();
102        }
103
104        #if DEBUG_RENDERER
105        if (dropCounter > 0) {
106            RENDERER_LOGD("Dropped %d frames on texture layer update", dropCounter);
107        }
108        #endif
109        mSurfaceTexture->getTransformMatrix(transform);
110        GLenum renderTarget = mSurfaceTexture->getCurrentTextureTarget();
111
112        LayerRenderer::updateTextureLayer(mLayer, mWidth, mHeight,
113                !mBlend, forceFilter, renderTarget, transform);
114    }
115}
116
117void DeferredLayerUpdater::detachSurfaceTexture() {
118    if (mSurfaceTexture.get()) {
119        mRenderThread.eglManager().requireGlContext();
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 = 0;
126        mLayer->clearTexture();
127    }
128}
129
130} /* namespace uirenderer */
131} /* namespace android */
132