查询支持的宽度范围和大小之间的差异范围内支持的宽度，使用参数调用 glGetGL_ALIASED_LINE_WIDTH_RANGE、GL_SMOOTH_LINE_WIDTH_RANGE 和GL_SMOOTH_LINE_WIDTH_GRANULARITY.

To query the range of supported widths and the size difference between supported widths within the range, call glGet with arguments GL_ALIASED_LINE_WIDTH_RANGE, GL_SMOOTH_LINE_WIDTH_RANGE, and GL_SMOOTH_LINE_WIDTH_GRANULARITY.

参考

为了避免特定于设备的行为，我使用了四边形.从一个小纹理中绘制一个 1x1 的正方形，然后定位、缩放(取决于您要绘制的线条的宽度和高度)、颜色和旋转它.

To avoid device specific behavior, I use a quad instead. Draw a 1x1 square from a small texture and then position, scale (depending on the width and height of the line you wanted to draw), color, and rotate it.