Qt-QSGTextureAtlas

所有的 png 圖都是以黑色圖呈現@@
出現的error message:

QSGTextureAtlas: texture atlas allocation failed, code=501

src/quick/scenegraph/util/qsgatlastexture.cpp

GLenum errorCode = glGetError();
...
...
...
else if (errorCode != GL_NO_ERROR) {
    qDebug("QSGTextureAtlas: texture atlas allocation failed, code=%x", errorCode);
    funcs->glDeleteTextures(1, &m_texture_id);
    m_texture_id = 0;
}

查了一下，是關於openGL, here

GL_INVALID_VALUE, 0x0501

Given when a value parameter is not a legal value for that function.
This is only given for local problems;
if the spec allows the value in certain circumstances, 
where other parameters or state dictate those circumstances, 
then GL_INVALID_OPERATION is the result instead.

編everywhere時，有打開 es2, 後來只能重編試試，只開 opengl 重編後ok