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Different blending compared to official OpenGL backend #86

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lovelymono opened this issue Oct 26, 2022 · 2 comments
Open

Different blending compared to official OpenGL backend #86

lovelymono opened this issue Oct 26, 2022 · 2 comments
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@lovelymono
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lovelymono commented Oct 26, 2022 •
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OpenGL Wgpu
grim_1666812610 grim_1666812621

Description

The alpha blending looks different compared to the ImGui OpenGL 3 backend.

Repro steps

OpenGL is based on example_glfw_opengl3, Wgpu is based on imgui-wgpu-rs example.

System Information

  • imgui-wgpu-rs 0.20.0
  • Arch Linux, 6.0.2
  • Wayland, Sway
  • AMD Radeon iGPU
@lovelymono lovelymono added the bug Something isn't working label Oct 26, 2022
@lovelymono
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Similarly there's a huge difference in colors and blending between imgui-rs' glow renderer and wgpu.

Glow Wgpu
grim_1666857532 grim_1666857528

@parasyte
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FWIW imgui is known to do all of its color interpolations in the sRGB color space, which is mathematically incorrect. See ocornut/imgui#578

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@parasyte @lovelymono