atdunbg
5d88ed2057
Root causes behind blurry/unphysical materials (4K pocket watch render mushy, glass fully opaque, watch hands unreadable): - Textures loaded via stbi had a single mip level: 4096x4096 albedo/MR maps sampled with no LOD -> minification aliasing turned fine detail (watch hands) into noise. Generate a full blit-based mip chain with per-level layout transitions. - samplerAnisotropy was never enabled on the device and every sampler was created with anisotropy disabled: grazing-angle surfaces (watch face, ground) collapsed into a blur. Enable the device feature and 16x anisotropic filtering on material texture samplers. - glTF baseColorFactor was ignored: the glass material (alphaMode BLEND, no baseColor texture, baseColorFactor.a = 0.3) fell back to the default white texture with alpha = 1 and rendered fully opaque. MaterialParams gains a baseColor vec4 (rgb tints albedo, a scales the blend alpha) threaded through both PBR shaders. - alphaMode MASK was treated as opaque: add a factors.w switch that performs an alpha cutout test in the opaque shader. - Fix material cache key dropping factors.z (separate-roughness switch); it now encodes the full factors and baseColor vectors.
86 lines
2.8 KiB
C++
86 lines
2.8 KiB
C++
//
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// Created by atdunbg on 2026/9/20.
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//
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#ifndef HELLOVULKAN_TEXTURE_H
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#define HELLOVULKAN_TEXTURE_H
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#pragma once
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#include <Engine/Core/Types.h>
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#include <vulkan/vulkan.hpp>
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#include <array>
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#include <string>
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#include "MemoryAllocator.h"
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namespace Engine {
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class Device;
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class MemoryAllocator;
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class Texture {
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public:
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// 从磁盘图片加载（按扩展名分发：.dds → DdsLoader，其它 → stbi）。
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// srgb：颜色贴图语义（BaseColor/Emissive）为 true；数据图
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//（Normal/Specular 等）为 false —— 决定 vk 格式的 _SRGB 变体
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Texture(Device& device, MemoryAllocator& allocator, const std::string& path,
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bool srgb = true);
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// 程序化纹理：纯色（1x1），用于地面/调试等不依赖磁盘资产的场景
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struct ProceduralTag {};
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static Scope<Texture> CreateSolidColor(Device& device, MemoryAllocator& allocator,
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u8 r, u8 g, u8 b, bool srgb = true);
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// 带 alpha 的纯色纹理（透明管线验证等）
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static Scope<Texture> CreateSolidColorRGBA(Device& device, MemoryAllocator& allocator,
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u8 r, u8 g, u8 b, u8 a, bool srgb = true);
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~Texture();
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Texture(const Texture&) = delete;
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Texture& operator=(const Texture&) = delete;
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vk::Image Get() const { return m_Image; }
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vk::ImageView GetView() const { return m_View; }
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u32 GetWidth() const { return m_Width; }
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u32 GetHeight() const { return m_Height; }
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vk::Format GetFormat() const { return m_Format; }
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u32 GetMipLevels() const { return m_MipLevels; }
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vk::Sampler GetSampler() const { return m_Sampler; }
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private:
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// 两段式构造：先确定像素来源（磁盘 / 程序化），再走公共上传路径
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Texture(Device& device, MemoryAllocator& allocator, ProceduralTag,
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const std::array<u8, 4>& rgba, bool srgb);
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// 公共路径：staging → device local image → blit 生成完整 mip 链 →
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// view/sampler（RGBA8，各向异性过滤）
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void InitFromPixels(const void* pixels, u32 width, u32 height, bool srgb);
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// DDS 路径：压缩数据直传（BC 硬件采样解码）+ 文件自带 mip 链
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void InitFromDds(const std::string& path, bool srgb);
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Device& m_Device;
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vk::Image m_Image;
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vk::ImageView m_View;
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vk::Format m_Format = vk::Format::eUndefined;
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u32 m_MipLevels = 1;
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vk::Sampler m_Sampler;
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u32 m_Width = 0;
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u32 m_Height = 0;
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u64 m_TextureBytes = 0;
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MemoryAllocator::Allocation m_ImageAllocation;
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MemoryAllocator& m_Allocator;
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};
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} // namespace Engine
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#endif //HELLOVULKAN_TEXTURE_H
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