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feat(render3d): HDR calibration; fix the HDR toggle crash and yellow reading as red

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r3d_hdr_calibrate(peak, paper, black) feeds the tonemap's and the overlay's HDR10 variants and
the display's HDR metadata; ov_hdr_nits draws a calibration patch at a number of nits.

gpu_caps_probe asks the running Vulkan renderer's instance instead of making and destroying a
second one under Streamline's interposer, which left the next swapchain rebuild calling address 0.
The overlay gets an HDR10 variant, and the tonemap brightens HDR highlights by one factor rather
than per channel.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Orkun ÇAKILKAYA 2026-09-15 22:57:18 +03:00
parent d80786e99a
commit 65c1b9ca5c
10 changed files with 124 additions and 19 deletions
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bump: patch
type: feat
**HDR calibration, and two HDR fixes** — the HDR10 picture follows the player's display instead of one fixed curve.
- **`r3d_hdr_calibrate(peak, paper, black)`** — nits as float bits: the brightest the display shows (100-10000),
where the picture's and the interface's white sit (80-1000, never above the peak) and how far the darkest shade is
lifted (0-5, fading out by paper white). The tonemap's and the overlay's HDR10 variants read them, and the display's
HDR metadata is sent again with the new peak. The defaults are the old constants: 1000, 200 and 0.
- **`ov_hdr_nits(nits)` / `ov_hdr_paper()`** — what the overlay draws next is at that many nits on an HDR10 frame,
for a calibration screen's test patches; it closes the batch so far. No effect on an SDR frame.
- **Fixed: a crash toggling HDR on the Vulkan renderer.** `gpu_caps_probe()` made and destroyed a second Vulkan
instance under NVIDIA Streamline's interposer; the next swapchain rebuild then called through a pointer that
instance had left behind, at address 0. With the Vulkan renderer running, the probe asks its instance instead.
- **Fixed: yellow read as red in HDR.** The overlay drew sRGB values straight into the HDR10 swapchain (it now has an
HDR10 variant, chosen while `gpu_hdr_active()`), and the tonemap extended highlights per channel, which boosted a
bright yellow's red far more than its green; it now brightens the graded colour by one factor.