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Decode 16-bit color clears (TheCruZ/KytyPS5-GTA@b8dcd826)

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TheCruZ
2026-10-05 21:52:10 +04:00
committed by nmzik
parent dc3cd2d2c9
commit 57c97ebd86
2 changed files with 97 additions and 13 deletions
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src/graphics/host_gpu/renderer/image/imageInfo.h
+25
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@@ -390,7 +390,28 @@ inline constexpr std::array<VideoOutFormatPolicy, 7> VIDEO_OUT_FORMAT_POLICIES {
const auto encoded = static_cast<float>(value & 0xffu) / 255.0f;
return encoded <= 0.04045f ? encoded / 12.92f : std::pow((encoded + 0.055f) / 1.055f, 2.4f);
};
const auto float16 = [](uint32_t value) {
const auto sign = (value & 0x8000u) << 16u;
const auto exponent = (value >> 10u) & 0x1fu;
const auto mantissa = value & 0x3ffu;
if (exponent == 0) {
return std::copysign(static_cast<float>(mantissa) * 0x1p-24f,
std::bit_cast<float>(sign));
}
return std::bit_cast<float>(sign | ((exponent == 31 ? 255u : exponent + 112u) << 23u) |
(mantissa << 13u));
};
switch (format) {
case vk::Format::eR16G16Sfloat:
next.float32[1] = float16(packed >> 16u);
[[fallthrough]];
case vk::Format::eR16Sfloat: next.float32[0] = float16(packed); break;
case vk::Format::eR16G16Unorm:
next.float32[1] = static_cast<float>(packed >> 16u) / 65535.0f;
[[fallthrough]];
case vk::Format::eR16Unorm:
next.float32[0] = static_cast<float>(packed & 0xffffu) / 65535.0f;
break;
// A single-plane float target carries its clear as raw float bits, the same encoding the
// depth decoder below uses. Without this the clear is discarded and the target keeps stale
// contents.
@@ -443,6 +464,10 @@ inline constexpr std::array<VideoOutFormatPolicy, 7> VIDEO_OUT_FORMAT_POLICIES {
// Keep this separate: the first register word alone cannot describe a 64-bit color.
[[nodiscard]] inline bool DecodeColorDwordFill(vk::Format format, uint32_t packed,
vk::ClearColorValue& clear) {
if ((format == vk::Format::eR16Sfloat || format == vk::Format::eR16Unorm) &&
(packed & 0xffffu) != (packed >> 16u)) {
return false;
}
if (format == vk::Format::eR16G16B16A16Sfloat) {
if (packed != 0) {
return false;