> I'm aware that when drawing text, all glyphs should be aligned on a > single baseline. The example I've given does not do this; it aligns > the text on different font's baseline, causing the inconsistent > look.
This is what I told you in the very beginning: Your logic to position the glyphs vertically is flawed; you actually don't align them correctly – somewhere, you are not using the correct vertical offsets. I suggest that you check the FreeType demo programs for some guidance. https://gitlab.freedesktop.org/freetype/freetype-demos > When I'm talking about "aligning the baselines", I'm referring to > choosing a suitable baseline from different fonts. I use the term > "baseline" loosely as when rendering text from top to bottom, the > ascent value is used. Why not position the baseline for all fonts at position y=0? > Initially, I plan to calculate a global baseline from all the fonts > by averaging their respective baselines. Another way is to pick the > "lowest" baseline (as in the highest ascent value) as the global > baseline. I'm unsure of what strategy to use, so I'm curious about > what approach do other applications use to solve this problem. If I understand you correctly, we have an XY problem here. The real issue seems not to be the alignment on a baseline but rather how to compute the global bounding box of a text string that comprises different fonts. The answer to that was given repeatedly on the mailing list: If you need a bounding box correct to the pixel and you do hinting, you have to make FreeType compute all glyphs, store them somewhere, *then* walk over all individual bounding boxes and take the maximum dimensions to get the global one. Finally, you can render the glyphs with the correct offsets. Werner
