RenderState.cpp revision 49bc4acfadf9c5b1e520217278ccb38010d38c89 
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 "renderstate/RenderState.h"
17
18#include "renderthread/CanvasContext.h"
19#include "renderthread/EglManager.h"
20
21namespace android {
22namespace uirenderer {
23
24RenderState::RenderState(renderthread::RenderThread& thread)
25        : mRenderThread(thread)
26        , mCaches(nullptr)
27        , mMeshState(nullptr)
28        , mScissor(nullptr)
29        , mStencil(nullptr)
30        , mViewportWidth(0)
31        , mViewportHeight(0)
32        , mFramebuffer(0) {
33    mThreadId = pthread_self();
34}
35
36RenderState::~RenderState() {
37    LOG_ALWAYS_FATAL_IF(mMeshState || mScissor || mStencil,
38            "State object lifecycle not managed correctly");
39}
40
41void RenderState::onGLContextCreated() {
42    LOG_ALWAYS_FATAL_IF(mMeshState || mScissor || mStencil,
43            "State object lifecycle not managed correctly");
44    mMeshState = new MeshState();
45    mScissor = new Scissor();
46    mStencil = new Stencil();
47
48    // This is delayed because the first access of Caches makes GL calls
49    mCaches = &Caches::createInstance(*this);
50    mCaches->init();
51    mCaches->textureCache.setAssetAtlas(&mAssetAtlas);
52}
53
54static void layerLostGlContext(Layer* layer) {
55    layer->onGlContextLost();
56}
57
58void RenderState::onGLContextDestroyed() {
59/*
60    size_t size = mActiveLayers.size();
61    if (CC_UNLIKELY(size != 0)) {
62        ALOGE("Crashing, have %d contexts and %d layers at context destruction. isempty %d",
63                mRegisteredContexts.size(), size, mActiveLayers.empty());
64        mCaches->dumpMemoryUsage();
65        for (std::set<renderthread::CanvasContext*>::iterator cit = mRegisteredContexts.begin();
66                cit != mRegisteredContexts.end(); cit++) {
67            renderthread::CanvasContext* context = *cit;
68            ALOGE("Context: %p (root = %p)", context, context->mRootRenderNode.get());
69            ALOGE("  Prefeteched layers: %zu", context->mPrefetechedLayers.size());
70            for (std::set<RenderNode*>::iterator pit = context->mPrefetechedLayers.begin();
71                    pit != context->mPrefetechedLayers.end(); pit++) {
72                (*pit)->debugDumpLayers("    ");
73            }
74            context->mRootRenderNode->debugDumpLayers("  ");
75        }
76
77
78        if (mActiveLayers.begin() == mActiveLayers.end()) {
79            ALOGE("set has become empty. wat.");
80        }
81        for (std::set<const Layer*>::iterator lit = mActiveLayers.begin();
82             lit != mActiveLayers.end(); lit++) {
83            const Layer* layer = *(lit);
84            ALOGE("Layer %p, state %d, texlayer %d, fbo %d, buildlayered %d",
85                    layer, layer->state, layer->isTextureLayer(), layer->getFbo(), layer->wasBuildLayered);
86        }
87        LOG_ALWAYS_FATAL("%d layers have survived gl context destruction", size);
88    }
89*/
90
91    // TODO: reset all cached state in state objects
92    std::for_each(mActiveLayers.begin(), mActiveLayers.end(), layerLostGlContext);
93    mAssetAtlas.terminate();
94
95    delete mMeshState;
96    mMeshState = nullptr;
97    delete mScissor;
98    mScissor = nullptr;
99    delete mStencil;
100    mStencil = nullptr;
101}
102
103void RenderState::setViewport(GLsizei width, GLsizei height) {
104    mViewportWidth = width;
105    mViewportHeight = height;
106    glViewport(0, 0, mViewportWidth, mViewportHeight);
107}
108
109
110void RenderState::getViewport(GLsizei* outWidth, GLsizei* outHeight) {
111    *outWidth = mViewportWidth;
112    *outHeight = mViewportHeight;
113}
114
115void RenderState::bindFramebuffer(GLuint fbo) {
116    if (mFramebuffer != fbo) {
117        mFramebuffer = fbo;
118        glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
119    }
120}
121
122void RenderState::invokeFunctor(Functor* functor, DrawGlInfo::Mode mode, DrawGlInfo* info) {
123    interruptForFunctorInvoke();
124    (*functor)(mode, info);
125    resumeFromFunctorInvoke();
126}
127
128void RenderState::interruptForFunctorInvoke() {
129    if (mCaches->currentProgram) {
130        if (mCaches->currentProgram->isInUse()) {
131            mCaches->currentProgram->remove();
132            mCaches->currentProgram = nullptr;
133        }
134    }
135    mCaches->resetActiveTexture();
136    meshState().unbindMeshBuffer();
137    meshState().unbindIndicesBuffer();
138    meshState().resetVertexPointers();
139    meshState().disableTexCoordsVertexArray();
140    debugOverdraw(false, false);
141}
142
143void RenderState::resumeFromFunctorInvoke() {
144    glViewport(0, 0, mViewportWidth, mViewportHeight);
145    glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
146    debugOverdraw(false, false);
147
148    glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
149
150    scissor().invalidate();
151
152    mCaches->activeTexture(0);
153    mCaches->resetBoundTextures();
154
155    mCaches->blend = true;
156    glEnable(GL_BLEND);
157    glBlendFunc(mCaches->lastSrcMode, mCaches->lastDstMode);
158    glBlendEquation(GL_FUNC_ADD);
159}
160
161void RenderState::debugOverdraw(bool enable, bool clear) {
162    if (mCaches->debugOverdraw && mFramebuffer == 0) {
163        if (clear) {
164            scissor().setEnabled(false);
165            stencil().clear();
166        }
167        if (enable) {
168            stencil().enableDebugWrite();
169        } else {
170            stencil().disable();
171        }
172    }
173}
174
175void RenderState::requireGLContext() {
176    assertOnGLThread();
177    mRenderThread.eglManager().requireGlContext();
178}
179
180void RenderState::assertOnGLThread() {
181    pthread_t curr = pthread_self();
182    LOG_ALWAYS_FATAL_IF(!pthread_equal(mThreadId, curr), "Wrong thread!");
183}
184
185
186class DecStrongTask : public renderthread::RenderTask {
187public:
188    DecStrongTask(VirtualLightRefBase* object) : mObject(object) {}
189
190    virtual void run() override {
191        mObject->decStrong(nullptr);
192        mObject = nullptr;
193        delete this;
194    }
195
196private:
197    VirtualLightRefBase* mObject;
198};
199
200void RenderState::postDecStrong(VirtualLightRefBase* object) {
201    mRenderThread.queue(new DecStrongTask(object));
202}
203
204} /* namespace uirenderer */
205} /* namespace android */
206