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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>
This commit is contained in:
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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10
packages/ludic.render3d/shaders/overlay.frag
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@ -7,8 +7,11 @@ uniform sampler2D u_tex;
uniform sampler2D u_font;
out vec4 o_color;
#ifdef HDR10
// the interface is sRGB: drawn into an HDR10 frame it sits at paper white, as the picture's white does
const float HDR_PAPER = 200.0;
// the interface is sRGB: drawn into an HDR10 frame its white sits at the player's paper white, as the
// picture's white does. u_hdr_scale multiplies that for one batch (ov_hdr_nits): a calibration
// screen's test patches, which have to reach past paper white to the display's peak.
uniform float u_hdr_paper;
uniform float u_hdr_scale;
vec3 bt709_to_2020(vec3 c) {
return mat3(0.6274, 0.0691, 0.0164, 0.3293, 0.9195, 0.0880, 0.0433, 0.0114, 0.8956) * c;
}
@ -30,6 +33,7 @@ void main() {
o_color = vec4(v_col.rgb * t.rgb, v_col.a * t.a);
}
#ifdef HDR10
o_color.rgb = pq_encode(bt709_to_2020(pow(max(o_color.rgb, vec3(0.0)), vec3(2.2))) * HDR_PAPER);
float nits = max(u_hdr_paper, 80.0) * max(u_hdr_scale, 0.0);
o_color.rgb = pq_encode(bt709_to_2020(pow(max(o_color.rgb, vec3(0.0)), vec3(2.2))) * nits);
#endif
}