2 * Copyright (c) 2014 Samsung Electronics Co., Ltd.
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
19 #include <dali/internal/render/gl-resources/context.h>
26 #include <dali/public-api/common/constants.h>
27 #include <dali/internal/render/shaders/program.h>
28 #include <dali/integration-api/platform-abstraction.h>
29 #include <dali/internal/render/common/render-manager.h>
30 #include <dali/integration-api/debug.h>
38 namespace // unnamed namespace
46 const GLenum errorCode;
47 const char* errorString;
49 errorStrings errors[] =
51 { GL_NO_ERROR, "GL_NO_ERROR" },
52 { GL_INVALID_ENUM, "GL_INVALID_ENUM" },
53 { GL_INVALID_VALUE, "GL_INVALID_VALUE" },
54 { GL_INVALID_OPERATION, "GL_INVALID_OPERATION" },
55 { GL_OUT_OF_MEMORY, "GL_OUT_OF_MEMORY" }
59 * Called by std::for_each from ~Context
61 void deletePrograms(std::pair< std::size_t, Program* > hashProgram)
63 DALI_ASSERT_DEBUG( hashProgram.second );
64 delete hashProgram.second;
67 const unsigned int UNINITIALIZED_TEXTURE_UNIT = std::numeric_limits<unsigned int>::max();// GL_MAX_TEXTURE_UNITS can't be used because it's depreciated in gles2
69 } // unnamed namespace
72 Debug::Filter* Context::gGlLogFilter = Debug::Filter::New(Debug::Concise, false, "LOG_CONTEXT");
73 Debug::Filter* gContextLogFilter = Debug::Filter::New(Debug::Concise, false, "LOG_CONTEXT_META");
76 Context::Context(Integration::GlAbstraction& glAbstraction)
77 : mGlAbstraction(glAbstraction),
78 mGlContextCreated(false),
82 mDepthTestEnabled(false),
83 mDepthMaskEnabled(false),
84 mDitherEnabled(true), // This the only GL capability which defaults to true
85 mPolygonOffsetFillEnabled(false),
86 mSampleAlphaToCoverageEnabled(false),
87 mSampleCoverageEnabled(false),
88 mScissorTestEnabled(false),
89 mStencilTestEnabled(false),
90 mClearColorSet(false),
91 mBoundArrayBufferId(0),
92 mBoundElementArrayBufferId(0),
93 mBoundTransformFeedbackBufferId(0),
94 mActiveTextureUnit( UNINITIALIZED_TEXTURE_UNIT ),
95 mUsingDefaultBlendColor(true),
96 mBlendFuncSeparateSrcRGB(GL_ONE),
97 mBlendFuncSeparateDstRGB(GL_ZERO),
98 mBlendFuncSeparateSrcAlpha(GL_ONE),
99 mBlendFuncSeparateDstAlpha(GL_ZERO),
100 mBlendEquationSeparateModeRGB( GL_FUNC_ADD ),
101 mBlendEquationSeparateModeAlpha( GL_FUNC_ADD ),
103 mClearColor(Color::WHITE), // initial color, never used until it's been set by the user
104 mCullFaceMode(CullNone),
105 mViewPort( 0, 0, 0, 0 ),
106 mCurrentProgram( NULL ),
115 // release the cached programs
116 std::for_each(mProgramCache.begin(), mProgramCache.end(), deletePrograms);
117 mProgramCache.clear();
120 void Context::GlContextCreated()
122 DALI_LOG_INFO(gContextLogFilter, Debug::Verbose, "Context::GlContextCreated()\n");
124 DALI_ASSERT_DEBUG(!mGlContextCreated);
126 mGlContextCreated = true;
128 // Set the initial GL state, and check it.
131 // Programs now load on demand
134 void Context::GlContextDestroyed()
136 DALI_LOG_INFO(gContextLogFilter, Debug::Verbose, "Context::GlContextDestroyed()\n");
137 SetCurrentProgram( NULL );
138 // Inform programs they are no longer valid
139 const ProgramContainer::iterator endp = mProgramCache.end();
140 for ( ProgramContainer::iterator itp = mProgramCache.begin(); itp != endp; ++itp )
142 (*itp).second->GlContextDestroyed();
145 mGlContextCreated = false;
148 const char* Context::ErrorToString( GLenum errorCode )
150 for( unsigned int i = 0; i < sizeof(errors) / sizeof(errors[0]); ++i)
152 if (errorCode == errors[i].errorCode)
154 return errors[i].errorString;
157 return "Unknown Open GLES error";
160 void Context::ResetProgramMatrices()
162 const ProgramContainer::iterator endp = mProgramCache.end();
163 for ( ProgramContainer::iterator itp = mProgramCache.begin(); itp != endp; ++itp )
165 (*itp).second->SetProjectionMatrix( NULL );
166 (*itp).second->SetViewMatrix( NULL );
170 Program* Context::GetCachedProgram( std::size_t hash ) const
172 std::map< std::size_t, Program* >::const_iterator iter = mProgramCache.find(hash);
174 if (iter != mProgramCache.end())
181 void Context::CacheProgram( std::size_t hash, Program* pointer )
183 mProgramCache[ hash ] = pointer;
186 const Rect< int >& Context::GetViewport()
191 void Context::FlushVertexAttributeLocations()
193 for( unsigned int i = 0; i < MAX_ATTRIBUTE_CACHE_SIZE; ++i )
195 // see if our cached state is different to the actual state
196 if (mVertexAttributeCurrentState[ i ] != mVertexAttributeCachedState[ i ] )
198 // it's different so make the change to the driver
199 // and update the cached state
200 mVertexAttributeCurrentState[ i ] = mVertexAttributeCachedState[ i ];
202 if (mVertexAttributeCurrentState[ i ] )
204 LOG_GL("EnableVertexAttribArray %d\n", i);
205 CHECK_GL( *this, mGlAbstraction.EnableVertexAttribArray( i ) );
209 LOG_GL("DisableVertexAttribArray %d\n", i);
210 CHECK_GL( *this, mGlAbstraction.DisableVertexAttribArray( i ) );
217 void Context::SetVertexAttributeLocation(unsigned int location, bool state)
220 if( location >= MAX_ATTRIBUTE_CACHE_SIZE )
222 // not cached, make the gl call through context
225 LOG_GL("EnableVertexAttribArray %d\n", location);
226 CHECK_GL( *this, mGlAbstraction.EnableVertexAttribArray( location ) );
230 LOG_GL("DisableVertexAttribArray %d\n", location);
231 CHECK_GL( *this, mGlAbstraction.DisableVertexAttribArray( location ) );
236 // set the cached state, it will be set at the next draw call
237 // if it's different from the current driver state
238 mVertexAttributeCachedState[ location ] = state;
242 void Context::ResetVertexAttributeState()
244 // reset attribute cache
245 for( unsigned int i=0; i < MAX_ATTRIBUTE_CACHE_SIZE; ++i )
247 mVertexAttributeCachedState[ i ] = false;
248 mVertexAttributeCurrentState[ i ] = false;
250 LOG_GL("DisableVertexAttribArray %d\n", i);
251 CHECK_GL( *this, mGlAbstraction.DisableVertexAttribArray( i ) );
255 void Context::ResetGlState()
257 DALI_LOG_INFO(gContextLogFilter, Debug::Verbose, "Context::ResetGlState()\n");
258 DALI_ASSERT_DEBUG(mGlContextCreated);
260 mClearColorSet = false;
261 // Render manager will call clear in next render
263 // Reset internal state and Synchronize it with real OpenGL context.
264 // This may seem like overkill, but the GL context is not owned by dali-core,
265 // and no assumptions should be made about the initial state.
267 mGlAbstraction.ColorMask( true, true, true, true );
270 mGlAbstraction.StencilMask( 0xFF );
272 mBlendEnabled = false;
273 mGlAbstraction.Disable(GL_BLEND);
275 mDepthTestEnabled = false;
276 mGlAbstraction.Disable(GL_DEPTH_TEST);
278 mDepthMaskEnabled = false;
279 mGlAbstraction.DepthMask(GL_FALSE);
281 mDitherEnabled = false; // This the only GL capability which defaults to true
282 mGlAbstraction.Disable(GL_DITHER);
284 mPolygonOffsetFillEnabled = false;
285 mGlAbstraction.Disable(GL_POLYGON_OFFSET_FILL);
287 mSampleAlphaToCoverageEnabled = false;
288 mGlAbstraction.Disable(GL_SAMPLE_ALPHA_TO_COVERAGE);
290 mSampleCoverageEnabled = false;
291 mGlAbstraction.Disable(GL_SAMPLE_COVERAGE);
293 mScissorTestEnabled = false;
294 mGlAbstraction.Disable(GL_SCISSOR_TEST);
296 mStencilTestEnabled = false;
297 mGlAbstraction.Disable(GL_STENCIL_TEST);
299 mBoundArrayBufferId = 0;
300 LOG_GL("BindBuffer GL_ARRAY_BUFFER 0\n");
301 mGlAbstraction.BindBuffer(GL_ARRAY_BUFFER, mBoundArrayBufferId);
303 mBoundElementArrayBufferId = 0;
304 LOG_GL("BindBuffer GL_ELEMENT_ARRAY_BUFFER 0\n");
305 mGlAbstraction.BindBuffer(GL_ELEMENT_ARRAY_BUFFER, mBoundElementArrayBufferId);
307 #ifndef EMSCRIPTEN // not in WebGL
308 mBoundTransformFeedbackBufferId = 0;
309 LOG_GL("BindBuffer GL_TRANSFORM_FEEDBACK_BUFFER 0\n");
310 mGlAbstraction.BindBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, mBoundTransformFeedbackBufferId);
313 mActiveTextureUnit = UNINITIALIZED_TEXTURE_UNIT;
315 mUsingDefaultBlendColor = true;
316 mGlAbstraction.BlendColor( 0.0f, 0.0f, 0.0f, 0.0f );
318 mBlendFuncSeparateSrcRGB = GL_ONE;
319 mBlendFuncSeparateDstRGB = GL_ZERO;
320 mBlendFuncSeparateSrcAlpha = GL_ONE;
321 mBlendFuncSeparateDstAlpha = GL_ZERO;
322 mGlAbstraction.BlendFuncSeparate( mBlendFuncSeparateSrcRGB, mBlendFuncSeparateDstRGB,
323 mBlendFuncSeparateSrcAlpha, mBlendFuncSeparateDstAlpha );
325 // initial state is GL_FUNC_ADD for both RGB and Alpha blend modes
326 mBlendEquationSeparateModeRGB = GL_FUNC_ADD;
327 mBlendEquationSeparateModeAlpha = GL_FUNC_ADD;
328 mGlAbstraction.BlendEquationSeparate( mBlendEquationSeparateModeRGB, mBlendEquationSeparateModeAlpha);
330 mCullFaceMode = CullNone;
331 mGlAbstraction.Disable(GL_CULL_FACE);
332 mGlAbstraction.FrontFace(GL_CCW);
333 mGlAbstraction.CullFace(GL_BACK);
335 // rebind texture units
336 for( unsigned int i=0; i < MAX_TEXTURE_UNITS; ++i )
338 mBound2dTextureId[ i ] = 0;
339 // set active texture
340 mGlAbstraction.ActiveTexture( GL_TEXTURE0 + i );
341 // bind the previous texture
342 mGlAbstraction.BindTexture(GL_TEXTURE_2D, mBound2dTextureId[ i ] );
345 // get maximum texture size
346 mGlAbstraction.GetIntegerv(GL_MAX_TEXTURE_SIZE, &mMaxTextureSize);
348 GLint numProgramBinaryFormats;
349 mGlAbstraction.GetIntegerv(GL_NUM_PROGRAM_BINARY_FORMATS_OES, &numProgramBinaryFormats);
350 if( GL_NO_ERROR == mGlAbstraction.GetError() && 0 != numProgramBinaryFormats )
352 mProgramBinaryFormats.Resize(numProgramBinaryFormats);
353 mGlAbstraction.GetIntegerv(GL_PROGRAM_BINARY_FORMATS_OES, &mProgramBinaryFormats[0]);
356 // reset viewport, this will be set to something useful when rendering
357 mViewPort.x = mViewPort.y = mViewPort.width = mViewPort.height = 0;
359 ResetVertexAttributeState();
362 #ifdef DALI_CONTEXT_LOGGING
364 void Context::PrintCurrentState()
366 DALI_LOG_INFO(SceneGraph::Context::gGlLogFilter, Debug::General,
367 "----------------- Context State BEGIN -----------------\n"
373 "Polygon Offset Fill = %s\n"
374 "Sample Alpha To Coverage = %s\n"
375 "Sample Coverage = %s\n"
376 "Scissor Test = %s\n"
377 "Stencil Test = %s\n"
378 "----------------- Context State END -----------------\n",
379 mBlendEnabled ? "Enabled" : "Disabled",
380 mDepthTestEnabled ? "Enabled" : "Disabled",
381 mDepthMaskEnabled ? "Enabled" : "Disabled",
382 mDitherEnabled ? "Enabled" : "Disabled",
383 mPolygonOffsetFillEnabled ? "Enabled" : "Disabled",
384 mSampleAlphaToCoverageEnabled ? "Enabled" : "Disabled",
385 mSampleCoverageEnabled ? "Enabled" : "Disabled",
386 mScissorTestEnabled ? "Enabled" : "Disabled",
387 mStencilTestEnabled ? "Enabled" : "Disabled");
390 #endif // DALI_CONTEXT_LOGGING
392 } // namespace Internal