Hello, I'd like to propose a fix for JDK-8146035. I am not a committer, so I hope someone can sponsor this fix. I work at Jetbrains, which has signed a company-level contributor agreement, so, from a legal perspective, I believe, there are no obstacles.
My investigation shows that the issue is caused by incorrect determination of bitmap size, prepared for glyph rendering, so only part of glyph becomes visible due to cropping. This seems to happen because compatible bitmap is not selected into memory device context (DC) before calling GetTextMetrics. Documentation for CreateCompatibleDC call ( https://msdn.microsoft.com/en-us/library/windows/desktop/dd183489%28v=vs.85%29.aspx) says compatible bitmap needs to be selected into DC before any drawing operation. Even though GetTextMetrics is not a drawing operation, it turns out to be affected by selected bitmap's type too (by default a monochrome bitmap is selected in a memory DC). This behaviour was also mentioned in the following MSDN blog post comment: https://blogs.msdn.microsoft.com/oldnewthing/20060614-00/?p=30873#comment-392143 The proposed fix is to select a temporary 1x1 compatible bitmap into memory DC before GetTextMetrics call. Here's webrev link - http://adm-12504.intellij.net/ I didn't create a test case, as it would require a specific font file (I couldn't reproduce the issue for fonts bundled with Windows). Best regards, Dmitry Batrak
