Convert HDR scRGB input to normalized linear Rec.2020 before CAS, then
convert the filtered result back to scRGB. Use the content metadata to
select an appropriate normalization peak while leaving SDR unchanged.
This follows AMD's documented recommendation for applying CAS to HDR
content and prevents HDR highlights from being clamped and dimmed.
PQ sources excluded every external filter from the post-process chain.
Decode PQ/BT.2020 into FP16 linear scRGB before active effects and pass
the resulting transfer state to the desktop shader.
Keep the raw PQ path when no effect is active. This avoids adding a
conversion pass or per-frame latency to the common case.
Describe PQ pixels with the protocol-defined primary luminance range and
keep mastering luminance in the target volume. Track extended target-volume
support and omit unsupported metadata instead of creating an invalid image
description.
Keep the reference white associated with the active PQ description until
a replacement is ready. If asynchronous description creation fails, the
renderer now retains the complete previous HDR state instead of combining
new white-level values with stale compositor metadata.
Decode PQ/BT.2020 desktop pixels into an FP16 linear scRGB target before
compositing the color cursor, ImGui, damage overlay, and letterboxing.
Encode the damaged result to PQ once at the surface boundary. Keep logical
AND/XOR cursor masks in the encoded domain.
This preserves premultiplied cursor edges, prevents encoded-domain
blending, uses the Wayland output reference white for local overlays, and
keeps guest cursor white and display calibration independent from frame
SDR white. It also corrects HDR-to-SDR absolute luminance scaling, gamut
matrices, black handling, and buffer-age repair for the extra pass.
Suppress overlays when their conversion framebuffer is unavailable rather
than allowing unconverted sRGB draws into an HDR target.
Use named transfer constants for cursor shader state. Convert clipped
surface rectangles explicitly before using the frame-damage merge helper,
which avoids mixing its unsigned type with the EGL surface rectangle type.
Only advertise native PQ when the FP16 composition target is available.
SDR and native scRGB retain their direct single-pass paths.
Queue the display-server surface format while the renderer lock still
serializes the matching onFrameFormat update. This prevents the render
thread from presenting a frame in a new HDR encoding before the Wayland
image description transition has been queued.
Serialize asynchronous image-description state and publish compositor
capabilities safely across the Wayland and render threads.
Use the predefined Windows-scRGB description, query each output image
description for its configured reference white, and reapply HDR when the
surface moves to an output with different colour settings.
Request true floating-point EGL configs for scRGB and expose the native
encodings supported by the selected surface. Fall back to software HDR
mapping when the surface cannot represent the incoming wire format.
Resample PQ in linear light, keep SDR-only effects out of native PQ
chains, and consume the cursor-specific white level without changing
binary monochrome cursor mask operations.
Keep software HDR mapping enabled until the display server activates the
requested image description. Re-evaluate the state while rendering so
asynchronous readiness or failure updates the desktop, cursor, and overlay
together with a full redraw.
Publish HDR metadata through a locked request snapshot and wait for
image-description readiness before using it. Commit encoding changes with
matching content, preserve the active description during same-format
metadata replacements, and handle creation failures without protocol
errors.
Honor the IddCx 3x4 XYZ matrix and post-transfer LUT in the IDD
conversion pipeline. Carry transform changes to the client so EGL applies
the same calibration to hardware cursors, and invalidate the full frame
whenever calibration changes.
Apply the same sampling margin to swap damage as buffer-age repair and
clip reported rectangles to the EGL surface. This ensures compositors
update every pixel affected by scaling or filtering.
This commit turns the icon handling into using a macro so we don't need to do
weird conversions from unsigned long (needed by X11) to uint32_t (needed by
Wayland).
Also simplified the error handling path on Wayland.
Render ImGui to an intermediate SDR framebuffer and map it into the
native PQ or scRGB output using the Wayland surface reference white.
Preserve premultiplied alpha during conversion and limit composition to
damaged overlay regions.
LGMP session validation may wait 500 ms for the shared-memory heartbeat
to advance. Run it on a worker so Wayland input remains responsive while
preserving stale-data detection.
Build the active filter chain only when its configuration changes,
including filter settings or order, input format, dimensions, output
size, and DMA mode.
Unchanged frames now execute only the cached active filters, avoiding
repeated setup, preparation, and output-resolution queries.
Reconfiguration forces a full-frame pass to prevent stale intermediate
framebuffer contents.
Also refresh CAS and FSR uniforms when loading presets and move
downscale pass selection out of the per-frame path.
Track context-local GL bindings to avoid redundant program, framebuffer,
buffer, texture, sampler, viewport, blend, and scissor state changes.
Invalidate the cache across context switches, ImGui rendering, and
shared object changes. Preserve CPU-backed texture upload correctness by
explicitly clearing pixel unpack buffer bindings where required.
This reduces hot-path driver overhead without adding waits or GPU
synchronization.
Track PBO fences per upload slot and wait only when a slot is reused,
allowing rendering to proceed without a CPU stall. Use GPU-side waits
for cross-context DMABUF synchronization.
Also propagate KVMFR write-completion failures so incomplete
shared-memory frames are never submitted, while retaining incremental
damage-copy waits to avoid added latency.
Replace the per-frame uniform list with stable, name-cached handles that
retain their values across shader recompilation. Track dirty uniforms so
only changed values are uploaded, reducing redundant GL calls and buffer
management.
Add a reusable effect-pass pipeline with per-pass shaders, samplers,
formats, resolutions, and intermediate render targets. This makes
external effects easier to integrate and supports arbitrary multipass
chains.
Migrate the desktop, cursor, damage, 24-bit, downscale, CAS, and FSR
rendering paths to the new APIs. Also ensure framebuffer objects are
released correctly.
There is no reason to call a bunch of stuff before the xdg_surface is
configured, so let's not call them and cause early painting to happen
should the compositor decide to send the `preferred_scale` message early.
In fractional-scale-v1, the scaling is defined as follows:
> For toplevel surfaces, the size is rounded halfway away from zero.
Previously, it is undefined. This commit makes waylandScaleMulInt follow
the round half away from zero behaviour.
