fix: 阴影不可见——灯序依赖遍历顺序 + 光比失衡，新增帧截图调试能力
- 灯序修复（根因）：entt Each 遍历序不保证创建序，lights[0] 曾落到 点光（params.x=1）→ shader 阴影分支整个跳过。收集后 stable_sort 方向光排前，确立"lights[0] = CSM 阴影光源"契约 - 光比失衡：IBL 环境与点光淹没主光阴影。KeyLight 5.0 + exposure 默认 0.6 + ambientColor 0.07；阴影区环境光同步衰减（简化遮蔽） - ShadowPass depth bias 0.006（acne 均值形态 vs 推过头丢阴影的折中） - Renderer 帧截图能力：第 60 帧自动截 HDRColor/ShadowMap 落 BMP （ACES+gamma 还原屏幕观感），视觉调试自闭环不再依赖肉眼 - KeyLight 增加 intensity slider（0-20 运行时可调）
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@@ -42,9 +42,83 @@
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#include <array>
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#include <filesystem>
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#include <limits>
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#include <bit>
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#include <fstream>
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namespace Engine
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{
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namespace
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{
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// fp16 → f32（截图用，规范路径足够）
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f32 HalfToFloat(u16 h)
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{
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const u32 sign = (h & 0x8000u) << 16u;
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const u32 exp = (h >> 10u) & 0x1Fu;
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const u32 man = h & 0x3FFu;
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u32 bits;
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if (exp == 0) {
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if (man == 0) return std::bit_cast<f32>(sign);
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u32 e = 127 - 15 + 1;
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u32 m = man;
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while (!(m & 0x400u)) { m <<= 1u; --e; }
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bits = sign | (e << 23u) | ((m & 0x3FFu) << 13u);
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} else if (exp == 31) {
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bits = sign | 0x7F800000u | (man << 13u);
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} else {
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bits = sign | ((exp - 15u + 127u) << 23u) | (man << 13u);
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}
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return std::bit_cast<f32>(bits);
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}
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// RGBA16F 线性数据 → 24bpp BMP（行倒序；depthMode 读 f32 深度）
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void WriteHdrBMP(const std::string& path, const void* data,
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u32 w, u32 h, bool depthMode = false)
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{
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const auto* src = static_cast<const u16*>(data);
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const u32 rowBytes = w * 3u;
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const u32 pad = (4u - rowBytes % 4u) % 4u;
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const u32 stride = rowBytes + pad;
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const u32 size = 54u + stride * h;
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std::vector<u8> bmp(size, 0);
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auto put = [&bmp](u32 off, u32 v, u32 n) {
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for (u32 i = 0; i < n; ++i)
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bmp[off + i] = static_cast<u8>((v >> (8u * i)) & 0xFFu);
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};
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bmp[0] = 'B'; bmp[1] = 'M';
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put(2, size, 4); put(10, 54, 4); put(14, 40, 4);
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put(18, w, 4); put(22, h, 4); put(26, 1, 2); put(28, 24, 2);
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put(34, stride * h, 4);
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for (u32 y = 0; y < h; ++y) {
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const u32 dstRow = h - 1 - y; // BMP 底行在前
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for (u32 x = 0; x < w; ++x) {
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const u16* px = src + (static_cast<size_t>(y) * w + x) * 4;
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const u32 off = 54u + dstRow * stride + x * 3u;
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for (u32 c = 0; c < 3; ++c) {
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f32 v;
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if (depthMode) {
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// D32 buffer：f32 深度，反相显示（近=白）
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v = 1.0f - reinterpret_cast<const f32*>(
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data)[static_cast<size_t>(y) * w + x];
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} else {
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v = HalfToFloat(px[c]) * 0.6f; // 匹配默认 exposure
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// ACES 近似（与 TonemapPass 同族），还原屏幕观感
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v = (v * (2.51f * v + 0.03f)) /
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(v * (2.43f * v + 0.59f) + 0.14f);
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v = glm::pow(glm::clamp(v, 0.0f, 1.0f),
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1.0f / 2.2f);
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}
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bmp[off + c] = static_cast<u8>(v * 255.0f);
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}
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}
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}
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std::ofstream file(path, std::ios::binary);
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file.write(reinterpret_cast<const char*>(bmp.data()),
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static_cast<std::streamsize>(bmp.size()));
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}
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}
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Renderer::Renderer(Window& window)
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: m_Window(window)
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{
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@@ -104,15 +178,19 @@ namespace Engine
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m_SceneGpu->textureSetLayout);
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// 8. RenderGraph：资源声明 + pass 注册 + 首次编译
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ENGINE_INFO("[diag] BuildGraph begin");
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m_PostParams = CreateScope<Passes::PostProcessParams>();
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BuildGraph();
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ENGINE_INFO("[diag] BuildGraph done");
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// 首次编译后物理镜像就位：各 pass 绑定自己的输入描述符
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for (auto& pass : m_Passes) {
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pass->OnTargetsRebuilt(*m_RenderGraph);
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}
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ENGINE_INFO("[diag] targets rebuilt");
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// 环境辐照度绑定（view 全程稳定，绑一次）
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m_SceneGpu->BindEnvironment(*m_Environment);
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ENGINE_INFO("[diag] environment bound");
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// 9. GPU timestamp：每 pass 两枚（前后），按帧槽位分区
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m_QueriesPerFrame = static_cast<u32>(m_RenderGraph->GetPassCount()) * 2;
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@@ -392,6 +470,68 @@ namespace Engine
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m_RenderGraph->Execute(frameCtx);
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// 调试截图：帧尾把 TAAColor 拷进 host buffer（一次）
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++m_FrameCounter;
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const bool doCapture = !m_Captured && m_FrameCounter == 60;
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vk::Image capImage{};
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vk::Extent2D capExtent{};
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vk::Format capFormat{};
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vk::ImageLayout capResting{};
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if (doCapture &&
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m_RenderGraph->GetCaptureTarget(m_HDRColor, frameSlot,
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capImage, capExtent, capFormat, capResting)) {
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const vk::DeviceSize capBytes = static_cast<vk::DeviceSize>(
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capExtent.width) * capExtent.height * 8; // RGBA16F
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const bool capDepth = capFormat == vk::Format::eD32Sfloat;
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m_CaptureAlloc = m_Allocator->CreateBuffer(
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capBytes,
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vk::BufferUsageFlagBits::eTransferDst,
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vk::MemoryPropertyFlagBits::eHostVisible |
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vk::MemoryPropertyFlagBits::eHostCoherent);
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// resting → TRANSFER_SRC → 拷贝 → 恢复 resting
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const vk::ImageAspectFlagBits capAspect =
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capDepth ? vk::ImageAspectFlagBits::eDepth
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: vk::ImageAspectFlagBits::eColor;
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vk::ImageMemoryBarrier2 toSrc;
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toSrc.setSrcStageMask(vk::PipelineStageFlagBits2::eAllCommands)
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.setSrcAccessMask(vk::AccessFlagBits2::eMemoryWrite)
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.setDstStageMask(vk::PipelineStageFlagBits2::eTransfer)
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.setDstAccessMask(vk::AccessFlagBits2::eTransferRead)
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.setOldLayout(capResting)
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.setNewLayout(vk::ImageLayout::eTransferSrcOptimal)
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.setImage(capImage)
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.setSubresourceRange({capAspect, 0, 1, 0, 1});
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frameCtx.cmd.pipelineBarrier2(
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vk::DependencyInfo{}.setImageMemoryBarriers(toSrc));
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vk::BufferImageCopy capRegion;
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capRegion.setBufferOffset(0)
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.setBufferRowLength(0)
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.setBufferImageHeight(0)
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.setImageSubresource({capAspect, 0, 0, 1})
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.setImageOffset({0, 0, 0})
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.setImageExtent({capExtent.width, capExtent.height, 1});
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frameCtx.cmd.copyImageToBuffer(
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capImage, vk::ImageLayout::eTransferSrcOptimal,
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m_CaptureAlloc.Buffer, capRegion);
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vk::ImageMemoryBarrier2 back;
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back.setSrcStageMask(vk::PipelineStageFlagBits2::eTransfer)
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.setSrcAccessMask(vk::AccessFlagBits2::eTransferRead)
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.setDstStageMask(vk::PipelineStageFlagBits2::eAllCommands)
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.setDstAccessMask(vk::AccessFlagBits2::eMemoryRead |
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vk::AccessFlagBits2::eMemoryWrite)
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.setOldLayout(vk::ImageLayout::eTransferSrcOptimal)
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.setNewLayout(capResting)
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.setImage(capImage)
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.setSubresourceRange({vk::ImageAspectFlagBits::eColor,
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0, 1, 0, 1});
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frameCtx.cmd.pipelineBarrier2(
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vk::DependencyInfo{}.setImageMemoryBarriers(back));
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}
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m_CommandManager->EndFrame(frameSlot);
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// 5. 提交
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@@ -435,6 +575,20 @@ namespace Engine
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HandleResize();
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}
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// 调试截图落盘：等 fence（copy 已提交完成）→ fp16 → BMP
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if (doCapture) {
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m_Device->GetDevice().waitForFences(
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m_SyncManager->GetFrameFence(frameSlot), VK_TRUE,
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UINT64_MAX);
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WriteHdrBMP("capture.bmp", m_CaptureAlloc.MappedPtr,
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capExtent.width, capExtent.height, false);
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m_Allocator->Destroy(m_CaptureAlloc);
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m_Captured = true;
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ENGINE_INFO("Debug capture written: capture.bmp (HDRColor) "
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"shadowInstances={}",
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m_SceneRenderer->GetShadowInstanceCount());
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}
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m_CurrentFrame = (m_CurrentFrame + 1) % kMaxFramesInFlight;
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}
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