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>
40 namespace // unnamed namespace
48 const GLenum errorCode;
49 const char* errorString;
51 errorStrings errors[] =
53 { GL_NO_ERROR, "GL_NO_ERROR" },
54 { GL_INVALID_ENUM, "GL_INVALID_ENUM" },
55 { GL_INVALID_VALUE, "GL_INVALID_VALUE" },
56 { GL_INVALID_OPERATION, "GL_INVALID_OPERATION" },
57 { GL_OUT_OF_MEMORY, "GL_OUT_OF_MEMORY" }
61 * Called by std::for_each from ~Context
63 void deletePrograms(std::pair< std::size_t, Program* > hashProgram)
65 DALI_ASSERT_DEBUG( hashProgram.second );
66 delete hashProgram.second;
69 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
71 } // unnamed namespace
74 Debug::Filter* Context::gGlLogFilter = Debug::Filter::New(Debug::Concise, false, "LOG_CONTEXT");
77 Context::Context(Integration::GlAbstraction& glAbstraction)
78 : mGlAbstraction(glAbstraction),
79 mGlContextCreated(false),
83 mDepthTestEnabled(false),
84 mDepthMaskEnabled(false),
85 mDitherEnabled(true), // This the only GL capability which defaults to true
86 mPolygonOffsetFillEnabled(false),
87 mSampleAlphaToCoverageEnabled(false),
88 mSampleCoverageEnabled(false),
89 mScissorTestEnabled(false),
90 mStencilTestEnabled(false),
91 mClearColorSet(false),
92 mBoundArrayBufferId(0),
93 mBoundElementArrayBufferId(0),
94 mBoundTransformFeedbackBufferId(0),
95 mActiveTextureUnit( UNINITIALIZED_TEXTURE_UNIT ),
96 mUsingDefaultBlendColor(true),
97 mBlendFuncSeparateSrcRGB(GL_ONE),
98 mBlendFuncSeparateDstRGB(GL_ZERO),
99 mBlendFuncSeparateSrcAlpha(GL_ONE),
100 mBlendFuncSeparateDstAlpha(GL_ZERO),
101 mBlendEquationSeparateModeRGB( GL_FUNC_ADD ),
102 mBlendEquationSeparateModeAlpha( GL_FUNC_ADD ),
105 mClearColor(Color::WHITE), // initial color, never used until it's been set by the user
106 mCullFaceMode(CullNone),
107 mViewPort( 0, 0, 0, 0 ),
108 mCurrentProgram( NULL )
114 // release the cached programs
115 std::for_each(mProgramCache.begin(), mProgramCache.end(), deletePrograms);
116 mProgramCache.clear();
119 void Context::GlContextCreated()
121 DALI_ASSERT_DEBUG(!mGlContextCreated);
123 mGlContextCreated = true;
125 // Set the initial GL state, and check it.
128 const ProgramContainer::iterator endp = mProgramCache.end();
129 for ( ProgramContainer::iterator itp = mProgramCache.begin(); itp != endp; ++itp )
131 (*itp).second->GlContextCreated();
135 void Context::GlContextDestroyed()
137 const ProgramContainer::iterator endp = mProgramCache.end();
138 for ( ProgramContainer::iterator itp = mProgramCache.begin(); itp != endp; ++itp )
140 (*itp).second->GlContextDestroyed();
143 mGlContextCreated = false;
146 const char* Context::ErrorToString( GLenum errorCode )
148 for( unsigned int i = 0; i < sizeof(errors) / sizeof(errors[0]); ++i)
150 if (errorCode == errors[i].errorCode)
152 return errors[i].errorString;
155 return "Unknown Open GLES error";
158 void Context::ResetProgramMatrices()
160 const ProgramContainer::iterator endp = mProgramCache.end();
161 for ( ProgramContainer::iterator itp = mProgramCache.begin(); itp != endp; ++itp )
163 (*itp).second->SetProjectionMatrix( NULL );
164 (*itp).second->SetViewMatrix( NULL );
168 Program* Context::GetCachedProgram( std::size_t hash ) const
170 std::map< std::size_t, Program* >::const_iterator iter = mProgramCache.find(hash);
172 if (iter != mProgramCache.end())
179 void Context::CacheProgram( std::size_t hash, Program* pointer )
181 mProgramCache[ hash ] = pointer;
184 const Rect< int >& Context::GetViewport()
189 void Context::FlushVertexAttributeLocations()
191 for( unsigned int i = 0; i < MAX_ATTRIBUTE_CACHE_SIZE; ++i )
193 // see if our cached state is different to the actual state
194 if (mVertexAttributeCurrentState[ i ] != mVertexAttributeCachedState[ i ] )
196 // it's different so make the change to the driver
197 // and update the cached state
198 mVertexAttributeCurrentState[ i ] = mVertexAttributeCachedState[ i ];
200 if (mVertexAttributeCurrentState[ i ] )
202 LOG_GL("EnableVertexAttribArray %d\n", i);
203 CHECK_GL( *this, mGlAbstraction.EnableVertexAttribArray( i ) );
207 LOG_GL("DisableVertexAttribArray %d\n", i);
208 CHECK_GL( *this, mGlAbstraction.DisableVertexAttribArray( i ) );
215 void Context::SetVertexAttributeLocation(unsigned int location, bool state)
218 if( location >= MAX_ATTRIBUTE_CACHE_SIZE )
220 // not cached, make the gl call through context
223 LOG_GL("EnableVertexAttribArray %d\n", location);
224 CHECK_GL( *this, mGlAbstraction.EnableVertexAttribArray( location ) );
228 LOG_GL("DisableVertexAttribArray %d\n", location);
229 CHECK_GL( *this, mGlAbstraction.DisableVertexAttribArray( location ) );
234 // set the cached state, it will be set at the next draw call
235 // if it's different from the current driver state
236 mVertexAttributeCachedState[ location ] = state;
240 void Context::ResetVertexAttributeState()
242 // reset attribute cache
243 for( unsigned int i=0; i < MAX_ATTRIBUTE_CACHE_SIZE; ++i )
245 mVertexAttributeCachedState[ i ] = false;
246 mVertexAttributeCurrentState[ i ] = false;
248 LOG_GL("DisableVertexAttribArray %d\n", i);
249 CHECK_GL( *this, mGlAbstraction.DisableVertexAttribArray( i ) );
253 void Context::ResetGlState()
255 DALI_ASSERT_DEBUG(mGlContextCreated);
257 mClearColorSet = false;
258 // Render manager will call clear in next render
260 // Reset internal state and Synchronize it with real OpenGL context.
261 // This may seem like overkill, but the GL context is not owned by dali-core,
262 // and no assumptions should be made about the initial state.
264 mGlAbstraction.ColorMask( true, true, true, true );
267 mGlAbstraction.StencilMask( 0xFF );
269 mBlendEnabled = false;
270 mGlAbstraction.Disable(GL_BLEND);
272 mDepthTestEnabled = false;
273 mGlAbstraction.Disable(GL_DEPTH_TEST);
275 mDepthMaskEnabled = false;
276 mGlAbstraction.DepthMask(GL_FALSE);
278 mDitherEnabled = false; // This the only GL capability which defaults to true
279 mGlAbstraction.Disable(GL_DITHER);
281 mPolygonOffsetFillEnabled = false;
282 mGlAbstraction.Disable(GL_POLYGON_OFFSET_FILL);
284 mSampleAlphaToCoverageEnabled = false;
285 mGlAbstraction.Disable(GL_SAMPLE_ALPHA_TO_COVERAGE);
287 mSampleCoverageEnabled = false;
288 mGlAbstraction.Disable(GL_SAMPLE_COVERAGE);
290 mScissorTestEnabled = false;
291 mGlAbstraction.Disable(GL_SCISSOR_TEST);
293 mStencilTestEnabled = false;
294 mGlAbstraction.Disable(GL_STENCIL_TEST);
296 mBoundArrayBufferId = 0;
297 LOG_GL("BindBuffer GL_ARRAY_BUFFER 0\n");
298 mGlAbstraction.BindBuffer(GL_ARRAY_BUFFER, mBoundArrayBufferId);
300 mBoundElementArrayBufferId = 0;
301 LOG_GL("BindBuffer GL_ELEMENT_ARRAY_BUFFER 0\n");
302 mGlAbstraction.BindBuffer(GL_ELEMENT_ARRAY_BUFFER, mBoundElementArrayBufferId);
304 #ifndef EMSCRIPTEN // not in WebGL
305 mBoundTransformFeedbackBufferId = 0;
306 LOG_GL("BindBuffer GL_TRANSFORM_FEEDBACK_BUFFER 0\n");
307 mGlAbstraction.BindBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, mBoundTransformFeedbackBufferId);
310 mActiveTextureUnit = UNINITIALIZED_TEXTURE_UNIT;
312 mUsingDefaultBlendColor = true;
313 mGlAbstraction.BlendColor( 0.0f, 0.0f, 0.0f, 0.0f );
315 mBlendFuncSeparateSrcRGB = GL_ONE;
316 mBlendFuncSeparateDstRGB = GL_ZERO;
317 mBlendFuncSeparateSrcAlpha = GL_ONE;
318 mBlendFuncSeparateDstAlpha = GL_ZERO;
319 mGlAbstraction.BlendFuncSeparate( mBlendFuncSeparateSrcRGB, mBlendFuncSeparateDstRGB,
320 mBlendFuncSeparateSrcAlpha, mBlendFuncSeparateDstAlpha );
322 // initial state is GL_FUNC_ADD for both RGB and Alpha blend modes
323 mBlendEquationSeparateModeRGB = GL_FUNC_ADD;
324 mBlendEquationSeparateModeAlpha = GL_FUNC_ADD;
325 mGlAbstraction.BlendEquationSeparate( mBlendEquationSeparateModeRGB, mBlendEquationSeparateModeAlpha);
327 mCullFaceMode = CullNone;
328 mGlAbstraction.Disable(GL_CULL_FACE);
329 mGlAbstraction.FrontFace(GL_CCW);
330 mGlAbstraction.CullFace(GL_BACK);
332 // get max texture units
333 mGlAbstraction.GetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &mMaxTextureUnits);
334 DALI_ASSERT_DEBUG(mMaxTextureUnits > 7); // according to GLES 2.0 specification
335 mBound2dTextureId.reserve(mMaxTextureUnits);
336 // rebind texture units
337 for( int i=0; i < mMaxTextureUnits; ++i )
339 mBound2dTextureId[ i ] = 0;
340 // set active texture
341 mGlAbstraction.ActiveTexture( GL_TEXTURE0 + i );
342 // bind the previous texture
343 mGlAbstraction.BindTexture(GL_TEXTURE_2D, mBound2dTextureId[ i ] );
346 // get maximum texture size
347 mGlAbstraction.GetIntegerv(GL_MAX_TEXTURE_SIZE, &mMaxTextureSize);
349 GLint numProgramBinaryFormats;
350 mGlAbstraction.GetIntegerv(GL_NUM_PROGRAM_BINARY_FORMATS_OES, &numProgramBinaryFormats);
351 if( GL_NO_ERROR == mGlAbstraction.GetError() && 0 != numProgramBinaryFormats )
353 mProgramBinaryFormats.resize(numProgramBinaryFormats);
354 mGlAbstraction.GetIntegerv(GL_PROGRAM_BINARY_FORMATS_OES, &mProgramBinaryFormats[0]);
357 // reset viewport, this will be set to something useful when rendering
358 mViewPort.x = mViewPort.y = mViewPort.width = mViewPort.height = 0;
360 ResetVertexAttributeState();
363 #ifdef DALI_CONTEXT_LOGGING
365 void Context::PrintCurrentState()
367 DALI_LOG_INFO(SceneGraph::Context::gGlLogFilter, Debug::General,
368 "----------------- Context State BEGIN -----------------\n"
374 "Polygon Offset Fill = %s\n"
375 "Sample Alpha To Coverage = %s\n"
376 "Sample Coverage = %s\n"
377 "Scissor Test = %s\n"
378 "Stencil Test = %s\n"
379 "----------------- Context State END -----------------\n",
380 mBlendEnabled ? "Enabled" : "Disabled",
381 mDepthTestEnabled ? "Enabled" : "Disabled",
382 mDepthMaskEnabled ? "Enabled" : "Disabled",
383 mDitherEnabled ? "Enabled" : "Disabled",
384 mPolygonOffsetFillEnabled ? "Enabled" : "Disabled",
385 mSampleAlphaToCoverageEnabled ? "Enabled" : "Disabled",
386 mSampleCoverageEnabled ? "Enabled" : "Disabled",
387 mScissorTestEnabled ? "Enabled" : "Disabled",
388 mStencilTestEnabled ? "Enabled" : "Disabled");
391 #endif // DALI_CONTEXT_LOGGING
393 } // namespace Internal