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Fix text distortion on mobile devices/browsers with glow backend #6893

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Merged
emilk merged 8 commits into from
Apr 30, 2025
Merged

Fix text distortion on mobile devices/browsers with glow backend #6893

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84ceaf5
Update vertex.glsl
wareya Apr 28, 2025
5ea96b6
Update fragment.glsl
wareya Apr 28, 2025
832b635
Update fragment.glsl
wareya Apr 28, 2025
0e9bbb8
Update vertex.glsl
wareya Apr 28, 2025
89c0b1b
Update fragment.glsl
wareya Apr 29, 2025
730f9b2
Update vertex.glsl
wareya Apr 29, 2025
a556027
Update fragment.glsl
wareya Apr 30, 2025
5ae7e10
Update vertex.glsl
wareya Apr 30, 2025
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6 changes: 6 additions & 0 deletions crates/egui_glow/src/shader/fragment.glsl
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Original file line number Diff line number Diff line change
@@ -1,6 +1,12 @@
#ifdef GL_ES
// To avoid weird distortion issues when rendering text etc, we want highp if possible.
// But apparently some devices don't support it, so we have to check first.
#if defined(GL_FRAGMENT_PRECISION_HIGH) && GL_FRAGMENT_PRECISION_HIGH == 1
precision highp float;
#else
precision mediump float;
#endif
#endif
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wareya marked this conversation as resolved.

uniform sampler2D u_sampler;

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6 changes: 6 additions & 0 deletions crates/egui_glow/src/shader/vertex.glsl
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Original file line number Diff line number Diff line change
Expand Up @@ -9,8 +9,14 @@
#endif

#ifdef GL_ES
// To avoid weird distortion issues when rendering text etc, we want highp if possible.
// But apparently some devices don't support it, so we have to check first.
#if defined(GL_FRAGMENT_PRECISION_HIGH) && GL_FRAGMENT_PRECISION_HIGH == 1
precision highp float;
#else
precision mediump float;
#endif
#endif
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wareya marked this conversation as resolved.

uniform vec2 u_screen_size;
I vec2 a_pos;
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