Home | History | Annotate | Download | only in core 
      1 /*
      2  * Copyright (C) 2011 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 // #define LOG_NDEBUG 0
     17 
     18 #include "base/logging.h"
     19 #include "base/utilities.h"
     20 #include "core/gl_env.h"
     21 #include "core/shader_program.h"
     22 #include "core/vertex_frame.h"
     23 #include "system/window.h"
     24 
     25 #include <map>
     26 #include <string>
     27 #include <EGL/eglext.h>
     28 
     29 #include <gui/GLConsumer.h>
     30 
     31 namespace android {
     32 namespace filterfw {
     33 
     34 GLEnv::GLEnv()
     35   : display_(EGL_NO_DISPLAY),
     36     context_id_(0),
     37     surface_id_(0),
     38     max_surface_id_(0),
     39     created_context_(false),
     40     created_surface_(false),
     41     initialized_(false) {
     42 }
     43 
     44 GLEnv::~GLEnv() {
     45   // Destroy surfaces
     46   for (std::map<int, SurfaceWindowPair>::iterator it = surfaces_.begin();
     47        it != surfaces_.end();
     48        ++it) {
     49     if (it->first != 0 || created_surface_) {
     50       eglDestroySurface(display(), it->second.first);
     51       if (it->second.second) {
     52         it->second.second->Destroy();
     53         delete it->second.second;
     54       }
     55     }
     56   }
     57 
     58   // Destroy contexts
     59   for (std::map<int, EGLContext>::iterator it = contexts_.begin();
     60        it != contexts_.end();
     61        ++it) {
     62     if (it->first != 0 || created_context_)
     63       eglDestroyContext(display(), it->second);
     64   }
     65 
     66   // Destroy attached shaders and frames
     67   STLDeleteValues(&attached_shaders_);
     68   STLDeleteValues(&attached_vframes_);
     69 
     70   // Destroy display
     71   if (initialized_)
     72     eglTerminate(display());
     73 
     74   // Log error if this did not work
     75   if (CheckEGLError("TearDown!"))
     76     ALOGE("GLEnv: Error tearing down GL Environment!");
     77 }
     78 
     79 bool GLEnv::IsInitialized() const {
     80   return (contexts_.size() > 0 &&
     81           surfaces_.size() > 0 &&
     82           display_ != EGL_NO_DISPLAY);
     83 }
     84 
     85 bool GLEnv::Deactivate() {
     86   eglMakeCurrent(display(), EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
     87   return !CheckEGLError("eglMakeCurrent");
     88 }
     89 
     90 bool GLEnv::Activate() {
     91   ALOGV("Activate()");
     92   if (display()   != eglGetCurrentDisplay() ||
     93       context()   != eglGetCurrentContext() ||
     94       surface()   != eglGetCurrentSurface(EGL_DRAW)) {
     95     // Make sure we are initialized
     96     if (context() == EGL_NO_CONTEXT || surface() == EGL_NO_SURFACE)
     97       return false;
     98 
     99     // Make our context current
    100     ALOGV("eglMakeCurrent");
    101     eglMakeCurrent(display(), surface(), surface(), context());
    102 
    103     return !CheckEGLMakeCurrentError();
    104   }
    105   return true;
    106 }
    107 
    108 bool GLEnv::SwapBuffers() {
    109   const bool result = eglSwapBuffers(display(), surface()) == EGL_TRUE;
    110   return !CheckEGLError("eglSwapBuffers") && result;
    111 }
    112 
    113 bool GLEnv::InitWithCurrentContext() {
    114   if (IsInitialized())
    115     return true;
    116 
    117   display_     = eglGetCurrentDisplay();
    118   contexts_[0] = eglGetCurrentContext();
    119   surfaces_[0] = SurfaceWindowPair(eglGetCurrentSurface(EGL_DRAW), NULL);
    120 
    121   return (context() != EGL_NO_CONTEXT) &&
    122          (display() != EGL_NO_DISPLAY) &&
    123          (surface() != EGL_NO_SURFACE);
    124 }
    125 
    126 bool GLEnv::InitWithNewContext() {
    127   if (IsInitialized()) {
    128     ALOGE("GLEnv: Attempting to reinitialize environment!");
    129     return false;
    130   }
    131 
    132   display_ = eglGetDisplay(EGL_DEFAULT_DISPLAY);
    133   if (CheckEGLError("eglGetDisplay")) return false;
    134 
    135   EGLint majorVersion;
    136   EGLint minorVersion;
    137   eglInitialize(display(), &majorVersion, &minorVersion);
    138   if (CheckEGLError("eglInitialize")) return false;
    139   initialized_ = true;
    140 
    141   // Configure context/surface
    142   EGLConfig config;
    143   EGLint numConfigs = -1;
    144 
    145   // TODO(renn): Do we need the window bit here?
    146   // TODO: Currently choosing the config that includes all
    147   // This is not needed if the encoding is not being used
    148   EGLint configAttribs[] = {
    149     EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
    150     EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
    151     EGL_RED_SIZE, 8,
    152     EGL_GREEN_SIZE, 8,
    153     EGL_BLUE_SIZE, 8,
    154     EGL_RECORDABLE_ANDROID, EGL_TRUE,
    155     EGL_NONE
    156   };
    157 
    158   eglChooseConfig(display(), configAttribs, &config, 1, &numConfigs);
    159   if (numConfigs < 1) {
    160     ALOGE("GLEnv::Init: No suitable EGL configuration found!");
    161     return false;
    162   }
    163 
    164   // Create dummy surface using a GLConsumer
    165   sp<BufferQueue> bq = new BufferQueue();
    166   surfaceTexture_ = new GLConsumer(bq, 0);
    167   window_ = new Surface(static_cast<sp<IGraphicBufferProducer> >(bq));
    168 
    169   surfaces_[0] = SurfaceWindowPair(eglCreateWindowSurface(display(), config, window_.get(), NULL), NULL);
    170   if (CheckEGLError("eglCreateWindowSurface")) return false;
    171 
    172   // Create context
    173   EGLint context_attribs[] = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE };
    174   contexts_[0] = eglCreateContext(display(),
    175                                   config,
    176                                   EGL_NO_CONTEXT,
    177                                   context_attribs);
    178   if (CheckEGLError("eglCreateContext")) return false;
    179 
    180   created_context_ = created_surface_ = true;
    181 
    182   return true;
    183 }
    184 
    185 bool GLEnv::IsActive() const {
    186   ALOGV("IsActive()");
    187   return context() == eglGetCurrentContext()
    188     &&   display() == eglGetCurrentDisplay()
    189     &&   surface() == eglGetCurrentSurface(EGL_DRAW);
    190 }
    191 
    192 bool GLEnv::IsContextActive() const {
    193   return context() == eglGetCurrentContext();
    194 }
    195 
    196 bool GLEnv::IsAnyContextActive() {
    197   return eglGetCurrentContext() != EGL_NO_CONTEXT;
    198 }
    199 
    200 int GLEnv::AddWindowSurface(const EGLSurface& surface, WindowHandle* window_handle) {
    201   const int id = ++max_surface_id_;
    202   surfaces_[id] = SurfaceWindowPair(surface, window_handle);
    203   return id;
    204 }
    205 
    206 int GLEnv::AddSurface(const EGLSurface& surface) {
    207   return AddWindowSurface(surface, NULL);
    208 }
    209 
    210 bool GLEnv::SwitchToSurfaceId(int surface_id) {
    211   ALOGV("SwitchToSurfaceId");
    212   if (surface_id_ != surface_id) {
    213     const SurfaceWindowPair* surface = FindOrNull(surfaces_, surface_id);
    214     if (surface) {
    215       bool wasActive = IsActive();
    216       surface_id_ = surface_id;
    217       return wasActive ? Activate() : true;
    218     }
    219     return false;
    220   }
    221   return true;
    222 }
    223 
    224 bool GLEnv::ReleaseSurfaceId(int surface_id) {
    225   if (surface_id > 0) {
    226     const SurfaceWindowPair* surface_window_pair = FindOrNull(surfaces_, surface_id);
    227     if (surface_window_pair) {
    228       if (surface_id_ == surface_id)
    229         SwitchToSurfaceId(0);
    230       eglDestroySurface(display(), surface_window_pair->first);
    231       if (surface_window_pair->second) {
    232         surface_window_pair->second->Destroy();
    233         delete surface_window_pair->second;
    234       }
    235       surfaces_.erase(surface_id);
    236       return true;
    237     }
    238   }
    239   return false;
    240 }
    241 
    242 bool GLEnv::SetSurfaceTimestamp(int64_t timestamp) {
    243   if (surface_id_ > 0) {
    244     const SurfaceWindowPair* surface_window_pair = FindOrNull(surfaces_,
    245             surface_id_);
    246     if (surface_window_pair) {
    247       ANativeWindow *window = static_cast<ANativeWindow*>(
    248               surface_window_pair->second->InternalHandle());
    249       native_window_set_buffers_timestamp(window, timestamp);
    250       return true;
    251     }
    252   }
    253   return false;
    254 }
    255 
    256 int GLEnv::FindSurfaceIdForWindow(const WindowHandle* window_handle) {
    257   for (std::map<int, SurfaceWindowPair>::iterator it = surfaces_.begin();
    258        it != surfaces_.end();
    259        ++it) {
    260     const WindowHandle* my_handle = it->second.second;
    261     if (my_handle && my_handle->Equals(window_handle)) {
    262       return it->first;
    263     }
    264   }
    265   return -1;
    266 }
    267 
    268 
    269 int GLEnv::AddContext(const EGLContext& context) {
    270   const int id = contexts_.size();
    271   contexts_[id] = context;
    272   return id;
    273 }
    274 
    275 bool GLEnv::SwitchToContextId(int context_id) {
    276   const EGLContext* context = FindOrNull(contexts_, context_id);
    277   if (context) {
    278     if (context_id_ != context_id) {
    279       context_id_ = context_id;
    280       return Activate();
    281     }
    282     return true;
    283   }
    284   return false;
    285 }
    286 
    287 void GLEnv::ReleaseContextId(int context_id) {
    288   if (context_id > 0) {
    289     const EGLContext* context = FindOrNull(contexts_, context_id);
    290     if (context) {
    291       contexts_.erase(context_id);
    292       if (context_id_ == context_id && IsActive())
    293         SwitchToContextId(0);
    294       eglDestroyContext(display(), *context);
    295     }
    296   }
    297 }
    298 
    299 bool GLEnv::CheckGLError(const std::string& op) {
    300   bool err = false;
    301   for (GLint error = glGetError(); error; error = glGetError()) {
    302     ALOGE("GL Error: Operation '%s' caused GL error (0x%x)\n",
    303          op.c_str(),
    304          error);
    305     err = true;
    306   }
    307   return err;
    308 }
    309 
    310 bool GLEnv::CheckEGLError(const std::string& op) {
    311   bool err = false;
    312   for (EGLint error = eglGetError();
    313        error != EGL_SUCCESS;
    314        error = eglGetError()) {
    315     ALOGE("EGL Error: Operation '%s' caused EGL error (0x%x)\n",
    316          op.c_str(),
    317          error);
    318     err = true;
    319   }
    320   return err;
    321 }
    322 
    323 bool GLEnv::CheckEGLMakeCurrentError() {
    324   bool err = false;
    325   for (EGLint error = eglGetError();
    326        error != EGL_SUCCESS;
    327        error = eglGetError()) {
    328     switch (error) {
    329       case EGL_BAD_DISPLAY:
    330         ALOGE("EGL Error: Attempting to activate context with bad display!");
    331         break;
    332       case EGL_BAD_SURFACE:
    333         ALOGE("EGL Error: Attempting to activate context with bad surface!");
    334         break;
    335       case EGL_BAD_ACCESS:
    336         ALOGE("EGL Error: Attempting to activate context, which is "
    337              "already active in another thread!");
    338         break;
    339       default:
    340         ALOGE("EGL Error: Making EGL rendering context current caused "
    341              "error: 0x%x\n", error);
    342     }
    343     err = true;
    344   }
    345   return err;
    346 }
    347 
    348 GLuint GLEnv::GetCurrentProgram() {
    349   GLint result;
    350   glGetIntegerv(GL_CURRENT_PROGRAM, &result);
    351   ALOG_ASSERT(result >= 0);
    352   return static_cast<GLuint>(result);
    353 }
    354 
    355 EGLDisplay GLEnv::GetCurrentDisplay() {
    356   return eglGetCurrentDisplay();
    357 }
    358 
    359 int GLEnv::NumberOfComponents(GLenum type) {
    360   switch (type) {
    361     case GL_BOOL:
    362     case GL_FLOAT:
    363     case GL_INT:
    364       return 1;
    365     case GL_BOOL_VEC2:
    366     case GL_FLOAT_VEC2:
    367     case GL_INT_VEC2:
    368       return 2;
    369     case GL_INT_VEC3:
    370     case GL_FLOAT_VEC3:
    371     case GL_BOOL_VEC3:
    372       return 3;
    373     case GL_BOOL_VEC4:
    374     case GL_FLOAT_VEC4:
    375     case GL_INT_VEC4:
    376     case GL_FLOAT_MAT2:
    377       return 4;
    378     case GL_FLOAT_MAT3:
    379       return 9;
    380     case GL_FLOAT_MAT4:
    381       return 16;
    382     default:
    383       return 0;
    384   }
    385 }
    386 
    387 void GLEnv::AttachShader(int key, ShaderProgram* shader) {
    388   ShaderProgram* existingShader = ShaderWithKey(key);
    389   if (existingShader)
    390     delete existingShader;
    391   attached_shaders_[key] = shader;
    392 }
    393 
    394 void GLEnv::AttachVertexFrame(int key, VertexFrame* frame) {
    395   VertexFrame* existingFrame = VertexFrameWithKey(key);
    396   if (existingFrame)
    397     delete existingFrame;
    398   attached_vframes_[key] = frame;
    399 }
    400 
    401 ShaderProgram* GLEnv::ShaderWithKey(int key) {
    402   return FindPtrOrNull(attached_shaders_, key);
    403 }
    404 
    405 VertexFrame* GLEnv::VertexFrameWithKey(int key) {
    406   return FindPtrOrNull(attached_vframes_, key);
    407 }
    408 
    409 } // namespace filterfw
    410 } // namespace android
    411