RenderState.cpp revision ff5c8e8097e3eff910632a568195b798798ccccc 
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    if (!mCaches) {
50        mCaches = &Caches::createInstance(*this);
51    }
52    mCaches->init();
53    mCaches->textureCache.setAssetAtlas(&mAssetAtlas);
54}
55
56static void layerLostGlContext(Layer* layer) {
57    layer->onGlContextLost();
58}
59
60void RenderState::onGLContextDestroyed() {
61/*
62    size_t size = mActiveLayers.size();
63    if (CC_UNLIKELY(size != 0)) {
64        ALOGE("Crashing, have %d contexts and %d layers at context destruction. isempty %d",
65                mRegisteredContexts.size(), size, mActiveLayers.empty());
66        mCaches->dumpMemoryUsage();
67        for (std::set<renderthread::CanvasContext*>::iterator cit = mRegisteredContexts.begin();
68                cit != mRegisteredContexts.end(); cit++) {
69            renderthread::CanvasContext* context = *cit;
70            ALOGE("Context: %p (root = %p)", context, context->mRootRenderNode.get());
71            ALOGE("  Prefeteched layers: %zu", context->mPrefetechedLayers.size());
72            for (std::set<RenderNode*>::iterator pit = context->mPrefetechedLayers.begin();
73                    pit != context->mPrefetechedLayers.end(); pit++) {
74                (*pit)->debugDumpLayers("    ");
75            }
76            context->mRootRenderNode->debugDumpLayers("  ");
77        }
78
79
80        if (mActiveLayers.begin() == mActiveLayers.end()) {
81            ALOGE("set has become empty. wat.");
82        }
83        for (std::set<const Layer*>::iterator lit = mActiveLayers.begin();
84             lit != mActiveLayers.end(); lit++) {
85            const Layer* layer = *(lit);
86            ALOGE("Layer %p, state %d, texlayer %d, fbo %d, buildlayered %d",
87                    layer, layer->state, layer->isTextureLayer(), layer->getFbo(), layer->wasBuildLayered);
88        }
89        LOG_ALWAYS_FATAL("%d layers have survived gl context destruction", size);
90    }
91*/
92
93    // TODO: reset all cached state in state objects
94    std::for_each(mActiveLayers.begin(), mActiveLayers.end(), layerLostGlContext);
95    mAssetAtlas.terminate();
96
97    delete mMeshState;
98    mMeshState = nullptr;
99    delete mScissor;
100    mScissor = nullptr;
101    delete mStencil;
102    mStencil = nullptr;
103}
104
105void RenderState::setViewport(GLsizei width, GLsizei height) {
106    mViewportWidth = width;
107    mViewportHeight = height;
108    glViewport(0, 0, mViewportWidth, mViewportHeight);
109}
110
111
112void RenderState::getViewport(GLsizei* outWidth, GLsizei* outHeight) {
113    *outWidth = mViewportWidth;
114    *outHeight = mViewportHeight;
115}
116
117void RenderState::bindFramebuffer(GLuint fbo) {
118    if (mFramebuffer != fbo) {
119        mFramebuffer = fbo;
120        glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
121    }
122}
123
124void RenderState::invokeFunctor(Functor* functor, DrawGlInfo::Mode mode, DrawGlInfo* info) {
125    interruptForFunctorInvoke();
126    (*functor)(mode, info);
127    resumeFromFunctorInvoke();
128}
129
130void RenderState::interruptForFunctorInvoke() {
131    if (mCaches->currentProgram) {
132        if (mCaches->currentProgram->isInUse()) {
133            mCaches->currentProgram->remove();
134            mCaches->currentProgram = nullptr;
135        }
136    }
137    mCaches->resetActiveTexture();
138    meshState().unbindMeshBuffer();
139    meshState().unbindIndicesBuffer();
140    meshState().resetVertexPointers();
141    meshState().disableTexCoordsVertexArray();
142    debugOverdraw(false, false);
143}
144
145void RenderState::resumeFromFunctorInvoke() {
146    glViewport(0, 0, mViewportWidth, mViewportHeight);
147    glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
148    debugOverdraw(false, false);
149
150    glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
151
152    scissor().invalidate();
153
154    mCaches->activeTexture(0);
155    mCaches->resetBoundTextures();
156
157    mCaches->blend = true;
158    glEnable(GL_BLEND);
159    glBlendFunc(mCaches->lastSrcMode, mCaches->lastDstMode);
160    glBlendEquation(GL_FUNC_ADD);
161}
162
163void RenderState::debugOverdraw(bool enable, bool clear) {
164    if (mCaches->debugOverdraw && mFramebuffer == 0) {
165        if (clear) {
166            scissor().setEnabled(false);
167            stencil().clear();
168        }
169        if (enable) {
170            stencil().enableDebugWrite();
171        } else {
172            stencil().disable();
173        }
174    }
175}
176
177void RenderState::requireGLContext() {
178    assertOnGLThread();
179    mRenderThread.eglManager().requireGlContext();
180}
181
182void RenderState::assertOnGLThread() {
183    pthread_t curr = pthread_self();
184    LOG_ALWAYS_FATAL_IF(!pthread_equal(mThreadId, curr), "Wrong thread!");
185}
186
187
188class DecStrongTask : public renderthread::RenderTask {
189public:
190    DecStrongTask(VirtualLightRefBase* object) : mObject(object) {}
191
192    virtual void run() override {
193        mObject->decStrong(nullptr);
194        mObject = nullptr;
195        delete this;
196    }
197
198private:
199    VirtualLightRefBase* mObject;
200};
201
202void RenderState::postDecStrong(VirtualLightRefBase* object) {
203    mRenderThread.queue(new DecStrongTask(object));
204}
205
206} /* namespace uirenderer */
207} /* namespace android */
208