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do not initialize VBO with big size for performance issue on some Android devices (#18060)

This commit is contained in:
minggo 2017-07-13 09:52:07 +08:00 committed by GitHub
parent 81d70adece
commit 2fbbdef58d
1 changed files with 8 additions and 1 deletions
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9
cocos/renderer/CCRenderer.cpp
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@ -281,7 +281,14 @@ void Renderer::setupVBOAndVAO()
glGenBuffers(2, &_buffersVBO[0]); glGenBuffers(2, &_buffersVBO[0]);
glBindBuffer(GL_ARRAY_BUFFER, _buffersVBO[0]); glBindBuffer(GL_ARRAY_BUFFER, _buffersVBO[0]);
glBufferData(GL_ARRAY_BUFFER, sizeof(_verts[0]) * VBO_SIZE, _verts, GL_DYNAMIC_DRAW); // Issue #15652
// Should not initialize VBO with a large size (VBO_SIZE=65536),
// it may cause low FPS on some Android devices like LG G4 & Nexus 5X.
// It's probably because some implementations of OpenGLES driver will
// copy the whole memory of VBO which initialized at the first time
// once glBufferData/glBufferSubData is invoked.
// For more discussion, please refer to https://github.com/cocos2d/cocos2d-x/issues/15652
//glBufferData(GL_ARRAY_BUFFER, sizeof(_verts[0]) * VBO_SIZE, _verts, GL_DYNAMIC_DRAW);
// vertices // vertices
glEnableVertexAttribArray(GLProgram::VERTEX_ATTRIB_POSITION); glEnableVertexAttribArray(GLProgram::VERTEX_ATTRIB_POSITION);