RenderState.cpp revision 96a5c4c7bab6718524de7253da8309143ab48bef 
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
54void RenderState::onGLContextDestroyed() {
55/*
56    size_t size = mActiveLayers.size();
57    if (CC_UNLIKELY(size != 0)) {
58        ALOGE("Crashing, have %d contexts and %d layers at context destruction. isempty %d",
59                mRegisteredContexts.size(), size, mActiveLayers.empty());
60        mCaches->dumpMemoryUsage();
61        for (std::set<renderthread::CanvasContext*>::iterator cit = mRegisteredContexts.begin();
62                cit != mRegisteredContexts.end(); cit++) {
63            renderthread::CanvasContext* context = *cit;
64            ALOGE("Context: %p (root = %p)", context, context->mRootRenderNode.get());
65            ALOGE("  Prefeteched layers: %zu", context->mPrefetechedLayers.size());
66            for (std::set<RenderNode*>::iterator pit = context->mPrefetechedLayers.begin();
67                    pit != context->mPrefetechedLayers.end(); pit++) {
68                (*pit)->debugDumpLayers("    ");
69            }
70            context->mRootRenderNode->debugDumpLayers("  ");
71        }
72
73
74        if (mActiveLayers.begin() == mActiveLayers.end()) {
75            ALOGE("set has become empty. wat.");
76        }
77        for (std::set<const Layer*>::iterator lit = mActiveLayers.begin();
78             lit != mActiveLayers.end(); lit++) {
79            const Layer* layer = *(lit);
80            ALOGE("Layer %p, state %d, texlayer %d, fbo %d, buildlayered %d",
81                    layer, layer->state, layer->isTextureLayer(), layer->getFbo(), layer->wasBuildLayered);
82        }
83        LOG_ALWAYS_FATAL("%d layers have survived gl context destruction", size);
84    }
85*/
86    // TODO: reset all cached state in state objects
87    mAssetAtlas.terminate();
88
89    delete mMeshState;
90    mMeshState = nullptr;
91    delete mScissor;
92    mScissor = nullptr;
93    delete mStencil;
94    mStencil = nullptr;
95}
96
97void RenderState::setViewport(GLsizei width, GLsizei height) {
98    mViewportWidth = width;
99    mViewportHeight = height;
100    glViewport(0, 0, mViewportWidth, mViewportHeight);
101}
102
103
104void RenderState::getViewport(GLsizei* outWidth, GLsizei* outHeight) {
105    *outWidth = mViewportWidth;
106    *outHeight = mViewportHeight;
107}
108
109void RenderState::bindFramebuffer(GLuint fbo) {
110    if (mFramebuffer != fbo) {
111        mFramebuffer = fbo;
112        glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
113    }
114}
115
116void RenderState::invokeFunctor(Functor* functor, DrawGlInfo::Mode mode, DrawGlInfo* info) {
117    interruptForFunctorInvoke();
118    (*functor)(mode, info);
119    resumeFromFunctorInvoke();
120}
121
122void RenderState::interruptForFunctorInvoke() {
123    if (mCaches->currentProgram) {
124        if (mCaches->currentProgram->isInUse()) {
125            mCaches->currentProgram->remove();
126            mCaches->currentProgram = nullptr;
127        }
128    }
129    mCaches->resetActiveTexture();
130    meshState().unbindMeshBuffer();
131    meshState().unbindIndicesBuffer();
132    meshState().resetVertexPointers();
133    meshState().disableTexCoordsVertexArray();
134    debugOverdraw(false, false);
135}
136
137void RenderState::resumeFromFunctorInvoke() {
138    glViewport(0, 0, mViewportWidth, mViewportHeight);
139    glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
140    debugOverdraw(false, false);
141
142    glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
143
144    scissor().invalidate();
145
146    mCaches->activeTexture(0);
147    mCaches->resetBoundTextures();
148
149    mCaches->blend = true;
150    glEnable(GL_BLEND);
151    glBlendFunc(mCaches->lastSrcMode, mCaches->lastDstMode);
152    glBlendEquation(GL_FUNC_ADD);
153}
154
155void RenderState::debugOverdraw(bool enable, bool clear) {
156    if (mCaches->debugOverdraw && mFramebuffer == 0) {
157        if (clear) {
158            scissor().setEnabled(false);
159            stencil().clear();
160        }
161        if (enable) {
162            stencil().enableDebugWrite();
163        } else {
164            stencil().disable();
165        }
166    }
167}
168
169void RenderState::requireGLContext() {
170    assertOnGLThread();
171    mRenderThread.eglManager().requireGlContext();
172}
173
174void RenderState::assertOnGLThread() {
175    pthread_t curr = pthread_self();
176    LOG_ALWAYS_FATAL_IF(!pthread_equal(mThreadId, curr), "Wrong thread!");
177}
178
179
180class DecStrongTask : public renderthread::RenderTask {
181public:
182    DecStrongTask(VirtualLightRefBase* object) : mObject(object) {}
183
184    virtual void run() override {
185        mObject->decStrong(nullptr);
186        mObject = nullptr;
187        delete this;
188    }
189
190private:
191    VirtualLightRefBase* mObject;
192};
193
194void RenderState::postDecStrong(VirtualLightRefBase* object) {
195    mRenderThread.queue(new DecStrongTask(object));
196}
197
198} /* namespace uirenderer */
199} /* namespace android */
200