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Fix regression on OpenGL (EGL) where non-sRGB still used sRGB #5642

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May 3, 2024
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Fix regression on OpenGL (EGL) where non-sRGB still used sRGB #5642

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4 changes: 4 additions & 0 deletions CHANGELOG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -72,6 +72,10 @@ By @stefnotch in [#5410](https://github.com/gfx-rs/wgpu/pull/5410)

### Bug Fixes

#### GLES / OpenGL

- Fix regression on OpenGL (EGL) where non-sRGB still used sRGB [#5642](https://github.com/gfx-rs/wgpu/pull/5642)

## v0.20.0 (2024-04-28)

### Major Changes
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12 changes: 12 additions & 0 deletions wgpu-hal/src/gles/egl.rs
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Expand Up @@ -1130,6 +1130,13 @@ impl Surface {

unsafe { gl.bind_framebuffer(glow::DRAW_FRAMEBUFFER, None) };
unsafe { gl.bind_framebuffer(glow::READ_FRAMEBUFFER, Some(sc.framebuffer)) };

if !matches!(self.srgb_kind, SrgbFrameBufferKind::None) {
// Disable sRGB conversions for `glBlitFramebuffer` as behavior does diverge between
// drivers and formats otherwise and we want to ensure no sRGB conversions happen.
unsafe { gl.disable(glow::FRAMEBUFFER_SRGB) };
}

// Note the Y-flipping here. GL's presentation is not flipped,
// but main rendering is. Therefore, we Y-flip the output positions
// in the shader, and also this blit.
Expand All @@ -1147,6 +1154,11 @@ impl Surface {
glow::NEAREST,
)
};

if !matches!(self.srgb_kind, SrgbFrameBufferKind::None) {
unsafe { gl.enable(glow::FRAMEBUFFER_SRGB) };
}

unsafe { gl.bind_framebuffer(glow::READ_FRAMEBUFFER, None) };

self.egl
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