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