Vulkan Schnee 0.0.1
High-performance rendering engine
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TextureType.h
Go to the documentation of this file.
1#pragma once
2#include <vulkan/vulkan_core.h>
3#include <cstdint>
4
5namespace Engine::Assets {
6
23
37constexpr VkFormat getVkFormat(TextureType type, int bits, int components) {
38 // For 8-bit textures, type determines SRGB vs UNORM
39 if (bits == 8) {
40 switch (components) {
41 case 1:
42 // Single channel
43 switch (type) {
44 case TextureType::BaseColor:
45 case TextureType::Emissive:
46 case TextureType::Unknown:
47 return VK_FORMAT_R8_SRGB;
48 case TextureType::Normal:
49 case TextureType::MetallicRoughness:
50 case TextureType::Lightmap:
51 return VK_FORMAT_R8_UNORM;
52 }
53 break;
54 case 2:
55 // Two channels
56 switch (type) {
57 case TextureType::BaseColor:
58 case TextureType::Emissive:
59 case TextureType::Unknown:
60 return VK_FORMAT_R8G8_SRGB;
61 case TextureType::Normal:
62 case TextureType::MetallicRoughness:
63 case TextureType::Lightmap:
64 return VK_FORMAT_R8G8_UNORM;
65 }
66 break;
67 case 3:
68 // Three channels (RGB)
69 switch (type) {
70 case TextureType::BaseColor:
71 case TextureType::Emissive:
72 case TextureType::Unknown:
73 return VK_FORMAT_R8G8B8_SRGB;
74 case TextureType::Normal:
75 case TextureType::MetallicRoughness:
76 case TextureType::Lightmap:
77 return VK_FORMAT_R8G8B8_UNORM;
78 }
79 break;
80 case 4:
81 default:
82 // Four channels (RGBA) - most common case
83 switch (type) {
84 case TextureType::BaseColor:
85 case TextureType::Emissive:
86 case TextureType::Unknown:
87 return VK_FORMAT_R8G8B8A8_SRGB;
88 case TextureType::Normal:
89 case TextureType::MetallicRoughness:
90 case TextureType::Lightmap:
91 return VK_FORMAT_R8G8B8A8_UNORM;
92 }
93 break;
94 }
95 }
96
97 // For 16-bit textures, always use SFLOAT (linear HDR data)
98 if (bits == 16) {
99 switch (components) {
100 case 1: return VK_FORMAT_R16_SFLOAT;
101 case 2: return VK_FORMAT_R16G16_SFLOAT;
102 case 3: return VK_FORMAT_R16G16B16_SFLOAT;
103 case 4:
104 default: return VK_FORMAT_R16G16B16A16_SFLOAT;
105 }
106 }
107
108 // For 32-bit textures, always use SFLOAT (linear HDR data)
109 if (bits == 32) {
110 switch (components) {
111 case 1: return VK_FORMAT_R32_SFLOAT;
112 case 2: return VK_FORMAT_R32G32_SFLOAT;
113 case 3: return VK_FORMAT_R32G32B32_SFLOAT;
114 case 4:
115 default: return VK_FORMAT_R32G32B32A32_SFLOAT;
116 }
117 }
118
119 // Fallback for unknown bit depths
120 return VK_FORMAT_R8G8B8A8_SRGB;
121}
122
129constexpr bool requiresLinearFormat(TextureType type) {
130 switch (type) {
131 case TextureType::Normal:
132 case TextureType::MetallicRoughness:
133 case TextureType::Lightmap:
134 return true;
135 case TextureType::BaseColor:
136 case TextureType::Emissive:
137 case TextureType::Unknown:
138 default:
139 return false;
140 }
141}
142
143} // namespace EngineCore
Engine::Assets::getVkFormat
constexpr VkFormat getVkFormat(TextureType type, int bits, int components)
Get the correct VkFormat based on texture type and image properties.
Definition TextureType.h:37
Engine::Assets::TextureType
TextureType
Represents the semantic type of a texture, determining its Vulkan format.
Definition TextureType.h:15
Engine::Assets::TextureType::Lightmap
@ Lightmap
HDR baked lighting data (SFLOAT format)
Definition TextureType.h:20
Engine::Assets::TextureType::Emissive
@ Emissive
Color data with gamma (SRGB format for 8-bit)
Definition TextureType.h:19
Engine::Assets::TextureType::BaseColor
@ BaseColor
Color data with gamma (SRGB format for 8-bit)
Definition TextureType.h:16
Engine::Assets::TextureType::Unknown
@ Unknown
Fallback type, uses SRGB as default.
Definition TextureType.h:21
Engine::Assets::TextureType::Normal
@ Normal
Linear data for normal maps (UNORM format for 8-bit)
Definition TextureType.h:17
Engine::Assets::TextureType::MetallicRoughness
@ MetallicRoughness
Linear data for PBR parameters (UNORM format for 8-bit)
Definition TextureType.h:18
Engine::Assets::requiresLinearFormat
constexpr bool requiresLinearFormat(TextureType type)
Check if a texture type requires linear (non-SRGB) format.
Definition TextureType.h:129