/* This file is part of Magnum. Copyright © 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 Vladimír Vondruš Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include "MeshState.h" #include "Magnum/GL/Context.h" #include "Magnum/GL/Extensions.h" #include "Magnum/GL/MeshView.h" #include "State.h" namespace Magnum { namespace GL { namespace Implementation { MeshState::MeshState(Context& context, ContextState& contextState, std::vector& extensions): currentVAO(0) #ifndef MAGNUM_TARGET_GLES2 , maxElementIndex{0}, maxElementsIndices{0}, maxElementsVertices{0} #endif { #ifndef MAGNUM_TARGET_GLES if(context.isExtensionSupported()) #elif defined(MAGNUM_TARGET_GLES2) if(context.isExtensionSupported()) #else static_cast(context); static_cast(extensions); #endif { #ifndef MAGNUM_TARGET_GLES extensions.emplace_back(Extensions::ARB::vertex_array_object::string()); #elif defined(MAGNUM_TARGET_GLES2) extensions.push_back(Extensions::OES::vertex_array_object::string()); #endif #ifndef MAGNUM_TARGET_GLES if(context.isExtensionSupported() #ifdef CORRADE_TARGET_WINDOWS && (!(context.detectedDriver() & Context::DetectedDriver::IntelWindows) || context.isDriverWorkaroundDisabled("intel-windows-crazy-broken-vao-dsa")) #endif ) { extensions.emplace_back(Extensions::ARB::direct_state_access::string()); /* Intel Windows drivers are ... special */ #ifdef CORRADE_TARGET_WINDOWS if((context.detectedDriver() & Context::DetectedDriver::IntelWindows) && !context.isDriverWorkaroundDisabled("intel-windows-broken-dsa-integer-vertex-attributes")) { attributePointerImplementation = &Mesh::attributePointerImplementationVAODSAIntelWindows; } else #endif { attributePointerImplementation = &Mesh::attributePointerImplementationVAODSA; } createImplementation = &Mesh::createImplementationVAODSA; bindIndexBufferImplementation = &Mesh::bindIndexBufferImplementationVAODSA; } else #endif { createImplementation = &Mesh::createImplementationVAO; attributePointerImplementation = &Mesh::attributePointerImplementationVAO; bindIndexBufferImplementation = &Mesh::bindIndexBufferImplementationVAO; } moveConstructImplementation = &Mesh::moveConstructImplementationVAO; moveAssignImplementation = &Mesh::moveAssignImplementationVAO; destroyImplementation = &Mesh::destroyImplementationVAO; acquireVertexBufferImplementation = &Mesh::acquireVertexBufferImplementationVAO; bindVAOImplementation = &Mesh::bindVAOImplementationVAO; bindImplementation = &Mesh::bindImplementationVAO; unbindImplementation = &Mesh::unbindImplementationVAO; } #if !defined(MAGNUM_TARGET_GLES) || defined(MAGNUM_TARGET_GLES2) else { createImplementation = &Mesh::createImplementationDefault; moveConstructImplementation = &Mesh::moveConstructImplementationDefault; moveAssignImplementation = &Mesh::moveAssignImplementationDefault; destroyImplementation = &Mesh::destroyImplementationDefault; attributePointerImplementation = &Mesh::attributePointerImplementationDefault; acquireVertexBufferImplementation = &Mesh::acquireVertexBufferImplementationDefault; bindIndexBufferImplementation = &Mesh::bindIndexBufferImplementationDefault; bindVAOImplementation = &Mesh::bindVAOImplementationDefault; bindImplementation = &Mesh::bindImplementationDefault; unbindImplementation = &Mesh::unbindImplementationDefault; } #endif #ifdef MAGNUM_TARGET_GLES /* Multi draw implementation on ES. Because there's a lot of dispatch logic involved, the multiDrawImplementationDefault then has internal extension-specific codepaths based on whether EXT, OES, ANGLE or whichever entrypoints are supported. */ #ifndef MAGNUM_TARGET_WEBGL if(context.isExtensionSupported() || context.isExtensionSupported()) #else if(context.isExtensionSupported()) #endif { #ifndef MAGNUM_TARGET_WEBGL if(context.isExtensionSupported()) { extensions.push_back(Extensions::EXT::multi_draw_arrays::string()); multiDrawArraysImplementation = glMultiDrawArraysEXT; multiDrawElementsImplementation = glMultiDrawElementsEXT; } else if(context.isExtensionSupported()) { extensions.push_back(Extensions::ANGLE::multi_draw::string()); multiDrawArraysImplementation = glMultiDrawArraysANGLE; multiDrawElementsImplementation = glMultiDrawElementsANGLE; } else CORRADE_INTERNAL_ASSERT_UNREACHABLE(); #else { extensions.push_back(Extensions::WEBGL::multi_draw::string()); /* The WEBGL extension uses the same entrypoints as the ANGLE extension it was based on. Only available since 2.0.0: https://github.com/emscripten-core/emscripten/pull/11650 */ #if __EMSCRIPTEN_major__*10000 + __EMSCRIPTEN_minor__*100 + __EMSCRIPTEN_tiny__ >= 20000 multiDrawArraysImplementation = glMultiDrawArraysANGLE; multiDrawElementsImplementation = glMultiDrawElementsANGLE; #else /* In Context::setupDriverWorkarounds() we make sure the extension is not even advertised, so this shouldn't be reached. */ CORRADE_INTERNAL_ASSERT_UNREACHABLE(); #endif } #endif multiDrawImplementation = &MeshView::multiDrawImplementationDefault; } else multiDrawImplementation = &MeshView::multiDrawImplementationFallback; #endif #ifdef MAGNUM_TARGET_GLES2 /* Instanced draw ímplementation on ES2 */ if(context.isExtensionSupported()) { extensions.push_back(Extensions::ANGLE::instanced_arrays::string()); drawArraysInstancedImplementation = &Mesh::drawArraysInstancedImplementationANGLE; drawElementsInstancedImplementation = &Mesh::drawElementsInstancedImplementationANGLE; } #ifndef MAGNUM_TARGET_WEBGL else if(context.isExtensionSupported() || context.isExtensionSupported()) { extensions.push_back(context.isExtensionSupported() ? Extensions::EXT::instanced_arrays::string() : Extensions::EXT::draw_instanced::string()); drawArraysInstancedImplementation = &Mesh::drawArraysInstancedImplementationEXT; drawElementsInstancedImplementation = &Mesh::drawElementsInstancedImplementationEXT; } else if(context.isExtensionSupported() || context.isExtensionSupported()) { extensions.push_back(context.isExtensionSupported() ? Extensions::NV::instanced_arrays::string() : Extensions::NV::draw_instanced::string()); drawArraysInstancedImplementation = &Mesh::drawArraysInstancedImplementationNV; drawElementsInstancedImplementation = &Mesh::drawElementsInstancedImplementationNV; } #endif else { drawArraysInstancedImplementation = nullptr; drawElementsInstancedImplementation = nullptr; } #endif #ifndef MAGNUM_TARGET_GLES if(context.isExtensionSupported() #ifdef CORRADE_TARGET_WINDOWS && (!(context.detectedDriver() & Context::DetectedDriver::IntelWindows) || context.isDriverWorkaroundDisabled("intel-windows-crazy-broken-vao-dsa")) #endif ) vertexAttribDivisorImplementation = &Mesh::vertexAttribDivisorImplementationVAODSA; else if(context.isExtensionSupported()) vertexAttribDivisorImplementation = &Mesh::vertexAttribDivisorImplementationVAO; else vertexAttribDivisorImplementation = nullptr; #elif defined(MAGNUM_TARGET_GLES2) /* Instanced arrays implementation on ES2 */ if(context.isExtensionSupported()) { /* Extension added above */ vertexAttribDivisorImplementation = &Mesh::vertexAttribDivisorImplementationANGLE; } #ifndef MAGNUM_TARGET_WEBGL else if(context.isExtensionSupported()) { extensions.push_back(Extensions::EXT::instanced_arrays::string()); vertexAttribDivisorImplementation = &Mesh::vertexAttribDivisorImplementationEXT; } else if(context.isExtensionSupported()) { extensions.push_back(Extensions::NV::instanced_arrays::string()); vertexAttribDivisorImplementation = &Mesh::vertexAttribDivisorImplementationNV; } #endif else vertexAttribDivisorImplementation = nullptr; #endif #ifndef MAGNUM_TARGET_GLES /* If we are on core profile and ARB_VAO was explicitly disabled by the user, we need to bind a default VAO so we are still able to draw things. There's another "scratch" VAO that's used by Context::resetState() for crappy external code if ARB_VAO *isn't* disabled, but that one is generated on-demand as we optimistically hope crappy external code is not a norm. */ if(context.isExtensionDisabled() && context.isCoreProfileInternal(contextState)) { glGenVertexArrays(1, &defaultVAO); glBindVertexArray(defaultVAO); } #else static_cast(contextState); #endif } MeshState::~MeshState() { #ifndef MAGNUM_TARGET_GLES /* If the default VAO was created, we need to delete it to avoid leaks. Delete also the scratch VAO if the engine was so unlucky to have to run awful external GL code (it was created in Context::resetState()). */ if(defaultVAO) glDeleteVertexArrays(1, &defaultVAO); if(scratchVAO) glDeleteVertexArrays(1, &scratchVAO); #endif } void MeshState::reset() { currentVAO = State::DisengagedBinding; } }}}