Optimize text rendering performance by improving glyph visibility checking and reducing redundant computations. #1232
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richardshan0614
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postTranslate替代postConcatGlyphVisibleContext结构体和IsGlyphVisible函数，集中管理字形可见性判断逻辑scaledBounds，避免重复从 typeface 获取边界getTextureProxies()调用移至渲染循环外部