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Date/Time: Wed, 28 Jan 2026 17:37:28 +0000



OpenGL Text Rendering issue - Version 2829

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[2025-12-12 01:05:44]
gcUserStudies - Posts: 121
Here is an example of text issues I'm having with 2829. Attached files show screen shots of 2813 with OpenGL Enabled/Disabled and then 2829 running the same study with OpenGL Enabled/Disabled. Attached are screenshots and code to replicate the issue.

Italic text with FW_BOLD does not render
- Italic + FW_BOLD = FAILS
- Italic + FW_NORMAL = works

FW_NORMAL text with multiple DrawTextAt calls does not render
- FW_NORMAL + multiple DrawTextAt = FAILS
- FW_BOLD + multiple DrawTextAt = works

Not sure if this is a coding issue or something related to the 2829 version. Thank you.
image2813.png / V - Attached On 2025-12-12 01:03:34 UTC - Size: 421.36 KB - 51 views
image2829.png / V - Attached On 2025-12-12 01:03:37 UTC - Size: 502.18 KB - 48 views
attachmentOpenGL_Text_Issue.cpp - Attached On 2025-12-12 01:03:40 UTC - Size: 7.5 KB - 43 views
[2025-12-13 06:34:24]
Sierra_Chart Engineering - Posts: 22557
Refer to:
Important: Understanding Fonts and Text when using Open GL

We should have a solution to the nonvisible text out next week.

In general though you are going to want to avoid, using too many different fonts, and sizes because that will have a negative effect on performance.

We recommend using one font face, when using OpenGL and only change its size, and other attributes like bold.
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Date Time Of Last Edit: 2025-12-13 06:34:46

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