RenderState.cpp revision d7328ae7909328ff4aa2205b0de0d4f6f72a2e66 
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        , mViewportWidth(0)
27        , mViewportHeight(0)
28        , mFramebuffer(0) {
29    mThreadId = pthread_self();
30}
31
32RenderState::~RenderState() {
33    LOG_ALWAYS_FATAL_IF(mBlend || mMeshState || mScissor || mStencil,
34            "State object lifecycle not managed correctly");
35}
36
37void RenderState::onGLContextCreated() {
38    LOG_ALWAYS_FATAL_IF(mBlend || mMeshState || mScissor || mStencil,
39            "State object lifecycle not managed correctly");
40    mBlend = new Blend();
41    mMeshState = new MeshState();
42    mScissor = new Scissor();
43    mStencil = new Stencil();
44
45    // This is delayed because the first access of Caches makes GL calls
46    if (!mCaches) {
47        mCaches = &Caches::createInstance(*this);
48    }
49    mCaches->init();
50    mCaches->textureCache.setAssetAtlas(&mAssetAtlas);
51}
52
53static void layerLostGlContext(Layer* layer) {
54    layer->onGlContextLost();
55}
56
57void RenderState::onGLContextDestroyed() {
58/*
59    size_t size = mActiveLayers.size();
60    if (CC_UNLIKELY(size != 0)) {
61        ALOGE("Crashing, have %d contexts and %d layers at context destruction. isempty %d",
62                mRegisteredContexts.size(), size, mActiveLayers.empty());
63        mCaches->dumpMemoryUsage();
64        for (std::set<renderthread::CanvasContext*>::iterator cit = mRegisteredContexts.begin();
65                cit != mRegisteredContexts.end(); cit++) {
66            renderthread::CanvasContext* context = *cit;
67            ALOGE("Context: %p (root = %p)", context, context->mRootRenderNode.get());
68            ALOGE("  Prefeteched layers: %zu", context->mPrefetechedLayers.size());
69            for (std::set<RenderNode*>::iterator pit = context->mPrefetechedLayers.begin();
70                    pit != context->mPrefetechedLayers.end(); pit++) {
71                (*pit)->debugDumpLayers("    ");
72            }
73            context->mRootRenderNode->debugDumpLayers("  ");
74        }
75
76
77        if (mActiveLayers.begin() == mActiveLayers.end()) {
78            ALOGE("set has become empty. wat.");
79        }
80        for (std::set<const Layer*>::iterator lit = mActiveLayers.begin();
81             lit != mActiveLayers.end(); lit++) {
82            const Layer* layer = *(lit);
83            ALOGE("Layer %p, state %d, texlayer %d, fbo %d, buildlayered %d",
84                    layer, layer->state, layer->isTextureLayer(), layer->getFbo(), layer->wasBuildLayered);
85        }
86        LOG_ALWAYS_FATAL("%d layers have survived gl context destruction", size);
87    }
88*/
89
90    // TODO: reset all cached state in state objects
91    std::for_each(mActiveLayers.begin(), mActiveLayers.end(), layerLostGlContext);
92    mAssetAtlas.terminate();
93
94    mCaches->terminate();
95
96    delete mBlend;
97    mBlend = nullptr;
98    delete mMeshState;
99    mMeshState = nullptr;
100    delete mScissor;
101    mScissor = nullptr;
102    delete mStencil;
103    mStencil = nullptr;
104}
105
106void RenderState::setViewport(GLsizei width, GLsizei height) {
107    mViewportWidth = width;
108    mViewportHeight = height;
109    glViewport(0, 0, mViewportWidth, mViewportHeight);
110}
111
112
113void RenderState::getViewport(GLsizei* outWidth, GLsizei* outHeight) {
114    *outWidth = mViewportWidth;
115    *outHeight = mViewportHeight;
116}
117
118void RenderState::bindFramebuffer(GLuint fbo) {
119    if (mFramebuffer != fbo) {
120        mFramebuffer = fbo;
121        glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
122    }
123}
124
125void RenderState::invokeFunctor(Functor* functor, DrawGlInfo::Mode mode, DrawGlInfo* info) {
126    interruptForFunctorInvoke();
127    (*functor)(mode, info);
128    resumeFromFunctorInvoke();
129}
130
131void RenderState::interruptForFunctorInvoke() {
132    if (mCaches->currentProgram) {
133        if (mCaches->currentProgram->isInUse()) {
134            mCaches->currentProgram->remove();
135            mCaches->currentProgram = nullptr;
136        }
137    }
138    mCaches->textureState().resetActiveTexture();
139    meshState().unbindMeshBuffer();
140    meshState().unbindIndicesBuffer();
141    meshState().resetVertexPointers();
142    meshState().disableTexCoordsVertexArray();
143    debugOverdraw(false, false);
144}
145
146void RenderState::resumeFromFunctorInvoke() {
147    glViewport(0, 0, mViewportWidth, mViewportHeight);
148    glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
149    debugOverdraw(false, false);
150
151    glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
152
153    scissor().invalidate();
154    blend().invalidate();
155
156    mCaches->textureState().activateTexture(0);
157    mCaches->textureState().resetBoundTextures();
158}
159
160void RenderState::debugOverdraw(bool enable, bool clear) {
161    if (mCaches->debugOverdraw && mFramebuffer == 0) {
162        if (clear) {
163            scissor().setEnabled(false);
164            stencil().clear();
165        }
166        if (enable) {
167            stencil().enableDebugWrite();
168        } else {
169            stencil().disable();
170        }
171    }
172}
173
174void RenderState::requireGLContext() {
175    assertOnGLThread();
176    mRenderThread.eglManager().requireGlContext();
177}
178
179void RenderState::assertOnGLThread() {
180    pthread_t curr = pthread_self();
181    LOG_ALWAYS_FATAL_IF(!pthread_equal(mThreadId, curr), "Wrong thread!");
182}
183
184
185class DecStrongTask : public renderthread::RenderTask {
186public:
187    DecStrongTask(VirtualLightRefBase* object) : mObject(object) {}
188
189    virtual void run() override {
190        mObject->decStrong(nullptr);
191        mObject = nullptr;
192        delete this;
193    }
194
195private:
196    VirtualLightRefBase* mObject;
197};
198
199void RenderState::postDecStrong(VirtualLightRefBase* object) {
200    mRenderThread.queue(new DecStrongTask(object));
201}
202
203} /* namespace uirenderer */
204} /* namespace android */
205