This function sets mipmap streaming debug properties on any materials that use this Texture through the mipmap streaming system.
You can use this function to set up debug shader properties on materials that use this Texture through mipmap streaming. These are materials that are used by a Renderer that is visible to Cameras managed by the mipmap streaming system. To set up renderers and cameras for the mipmap streaming system see Texture Streaming.
Each of these materials has a material property for every streaming Texture it uses. The property is called (Texture property name)_mipInfo and contains the following values:
* streamingMipmapsMaxLevelReduction minus the number of mips that Unity has stripped in the texture.
*[mipmapCount](https://docs.unity.cn/ScriptReference/Texture-mipmapCount.html).
* desiredMipmapLevel.
* loadedMipmapLevel.
Use these properties in your own debug shaders to visualize the current streaming state of any Textures.
For example, when you use this function for a Texture named "MainTex", it sets a float4 property called "MainTex_MipInfo". This property contains Streaming Mip Level, Texture Original Mipmap Count, Desired Streaming Mip Level, and Loaded Mip Level in its x,y,z, and w fields.
For lightmaps, this function sets the unity_Lightmap_MipInfo property.
You can use Camera.SetReplacementShader to set a custom Unity shader that a camera renders debugging information for, using the materials you have set up. The following example shader uses these setup properties:
Shader "Show Mipmap Streaming" { Properties { _MainTex("", 2D) = "white" {} _Control("Control (RGBA)", 2D) = "red" {} _Splat3("Layer 3 (A)", 2D) = "white" {} _Splat2("Layer 2 (B)", 2D) = "white" {} _Splat1("Layer 1 (G)", 2D) = "white" {} _Splat0("Layer 0 (R)", 2D) = "white" {} _BaseMap("", 2D) = "white" {} _Cutoff("Cutoff", float) = 0.5 }
CGINCLUDE // Common code used by most of the things below #include "UnityCG.cginc" struct v2f { float4 pos : SV_POSITION; float2 uv : TEXCOORD0; }; uniform float4 _MainTex_ST; uniform float4 _MainTex_TexelSize; uniform float4 _MainTex_MipInfo;
UNITY_DECLARE_TEX2D(_MainTex); UNITY_DECLARE_TEX2D(_SceneViewMipcolorsTexture);
uint GetMipCount(Texture2D tex) { #if defined(SHADER_API_D3D11) || defined(SHADER_API_D3D12) || defined(SHADER_API_D3D11_9X) || defined(SHADER_API_XBOXONE) || defined(SHADER_API_PSSL) #define MIP_COUNT_SUPPORTED 1 #endif #if (defined(SHADER_API_OPENGL) || defined(SHADER_API_VULKAN)) && !defined(SHADER_STAGE_COMPUTE) // OpenGL only supports TextureSize for width, height, depth // TextureQueryLevels (GL_ARB_Texture_query_levels) needs OpenGL 4.3 or above and doesn't compile in compute shaders // tex.GetDimensions converted to TextureQueryLevels #define MIP_COUNT_SUPPORTED 1 #endif // Metal doesn't support high enough OpenGL version
#if defined(MIP_COUNT_SUPPORTED) uint mipLevel, width, height, mipCount; mipLevel = width = height = mipCount = 0; tex.GetDimensions(mipLevel, width, height, mipCount); return mipCount; #else return 0; #endif }
float4 GetStreamingMipColor(uint mipCount, float4 mipInfo) { // alpha is amount to blend with source color (0.0 = use original, 1.0 = use new color)
// mipInfo : // x = quality setings minStreamingMipLevel // y = original mip count for Texture // z = desired on screen mip level // w = loaded mip level uint originalTextureMipCount = uint(mipInfo.y);
// If material/shader mip info (original mip level) has not been set it’s either not a streamed Texture // or no renderer is updating it if (originalTextureMipCount == 0) return float4(0.0, 0.0, 1.0, 0.5);
uint desiredMipLevel = uint(mipInfo.z); uint mipCountDesired = uint(originalTextureMipCount) - uint(desiredMipLevel); if (mipCount == 0) { // Can't calculate, use the passed value mipCount = originalTextureMipCount - uint(mipInfo.w); }
if (mipCount < mipCountDesired) { // red tones when not at the desired mip level (reduction due to budget). Brighter is further from original, alpha 0 when at desired float ratioToDesired = float(mipCount) / float(mipCountDesired); return float4(1.0, 0.0, 0.0, 1.0 - ratioToDesired); } else if (mipCount >= originalTextureMipCount) { // original color when at (or beyond) original mip count return float4(1.0, 1.0, 1.0, 0.0); } else { // green tones when not at the original mip level. Brighter is closer to original, alpha 0 when at original float ratioToOriginal = float(mipCount) / float(originalTextureMipCount); return float4(0.0, 1.0, 0.0, 1.0 - ratioToOriginal); } }
float3 GetDebugStreamingMipColorBlended(float3 originalColor, Texture2D tex, float4 mipInfo) { uint mipCount = GetMipCount(tex); float4 mipColor = GetStreamingMipColor(mipCount, mipInfo); return lerp(originalColor, mipColor.rgb, mipColor.a); }
v2f vert(appdata_base v) { v2f o; o.pos = UnityObjectToClipPos(v.vertex); o.uv = TRANSFORM_TEX(v.texcoord, _MainTex);
return o; }
fixed4 frag(v2f i) : COLOR { fixed4 col = UNITY_SAMPLE_TEX2D(_MainTex, i.uv); half4 res; res.rgb = GetDebugStreamingMipColorBlended(col.rgb, _MainTex, _MainTex_MipInfo); res.a = col.a; return res; }
struct v2fGrass { float4 pos : SV_POSITION; fixed4 color : COLOR; float2 uv : TEXCOORD0; };
fixed4 fragGrass(v2fGrass i) : COLOR { fixed4 col = UNITY_SAMPLE_TEX2D(_MainTex, i.uv); half4 res; res.rgb = GetDebugStreamingMipColorBlended(col.rgb, _MainTex, _MainTex_MipInfo); res.a = col.a * i.color.a; return res; }
ENDCG
SubShader { Tags { "ForceSupported" = "True" "RenderType" = "Opaque" } Pass { CGPROGRAM
// As both normal opaque shaders and terrain splat shaders // have "Opaque" render type, we need to do some voodoo // to make both work.
#pragma vertex vertWTerrain #pragma fragment fragWTerrain #pragma target 2.0 #pragma exclude_renderers gles
struct v2fterr { float4 pos : SV_POSITION; float2 uvnormal : TEXCOORD0; float4 uv[3] : TEXCOORD2; float nonterrain : TEXCOORD5; };
uniform float4 _Splat0_ST, _Splat1_ST, _Splat2_ST, _Splat3_ST, _Splat4_ST; uniform float4 _Splat0_TexelSize, _Splat1_TexelSize, _Splat2_TexelSize, _Splat3_TexelSize, _Splat4_TexelSize; uniform float4 _BaseMap_TexelSize;
v2fterr vertWTerrain(appdata_base v) { v2fterr o; o.pos = UnityObjectToClipPos(v.vertex); // assume it's not a terrain if _Splat0_TexelSize is not set up. float nonterrain = _Splat0_TexelSize.z == 0.0 ? 1 : 0; // collapse/don't draw terrain's add pass in this mode, since it looks really bad if first pass // and add pass blink depending on which gets drawn first with this replacement shader // TODO: make it display mips properly even for two-pass terrains. o.pos *= _MainTex_TexelSize.z == 0.0 && _Splat0_TexelSize.z != 0.0 ? 0 : 1; // normal Texture UV o.uvnormal = TRANSFORM_TEX(v.texcoord, _MainTex); // terrain splat UVs float2 baseUV = v.texcoord.xy; o.uv[0].xy = baseUV; o.uv[0].zw = half2(0, 0); o.uv[1].xy = TRANSFORM_TEX(baseUV, _Splat0); o.uv[1].zw = TRANSFORM_TEX(baseUV, _Splat1); o.uv[2].xy = TRANSFORM_TEX(baseUV, _Splat2); o.uv[2].zw = TRANSFORM_TEX(baseUV, _Splat3);
o.nonterrain = nonterrain; return o; }
UNITY_DECLARE_TEX2D(_Control); UNITY_DECLARE_TEX2D(_Splat0); UNITY_DECLARE_TEX2D(_Splat1); UNITY_DECLARE_TEX2D(_Splat2); UNITY_DECLARE_TEX2D(_Splat3); UNITY_DECLARE_TEX2D(_BaseMap); fixed4 fragWTerrain(v2fterr i) : COLOR { // sample regular Texture fixed4 colnormal = UNITY_SAMPLE_TEX2D(_MainTex, i.uvnormal);
// sample splatmaps half4 splat_control = UNITY_SAMPLE_TEX2D(_Control, i.uv[0].xy); half3 splat_color = splat_control.r * UNITY_SAMPLE_TEX2D(_Splat0, i.uv[1].xy).rgb; splat_color += splat_control.g * UNITY_SAMPLE_TEX2D(_Splat1, i.uv[1].zw).rgb; splat_color += splat_control.b * UNITY_SAMPLE_TEX2D(_Splat2, i.uv[2].xy).rgb; splat_color += splat_control.a * UNITY_SAMPLE_TEX2D(_Splat3, i.uv[2].zw).rgb;
// lerp between normal and splatmaps half3 col = lerp(splat_color, colnormal.rgb, (half)i.nonterrain);
half4 res; // TODO: Take splat mips into account res.rgb = GetDebugStreamingMipColorBlended(col.rgb, _MainTex, _MainTex_MipInfo); res.a = colnormal.a;
return res; }
ENDCG } }
SubShader { Tags { "ForceSupported" = "True" "RenderType" = "Transparent" } Pass { Cull Off CGPROGRAM #pragma vertex vert #pragma fragment frag #pragma target 2.0 #pragma exclude_renderers gles ENDCG } }
SubShader { Tags { "ForceSupported" = "True" "RenderType" = "TransparentCutout" } Pass { AlphaTest Greater[_Cutoff] CGPROGRAM #pragma vertex vert #pragma fragment frag #pragma target 2.0 #pragma exclude_renderers gles ENDCG } }
SubShader { Tags { "ForceSupported" = "True" "RenderType" = "TreeBark" } Pass { CGPROGRAM #pragma vertex vertTreeBark #pragma fragment frag #pragma target 2.0 #pragma exclude_renderers gles #include "UnityCG.cginc" #include "UnityBuiltin3xTreeLibrary.cginc" v2f vertTreeBark(appdata_full v) { v2f o; TreeVertBark(v); o.pos = UnityObjectToClipPos(v.vertex); o.uv = v.texcoord; return o; }
ENDCG } }
SubShader { Tags { "ForceSupported" = "True" "RenderType" = "TreeLeaf" } Pass { CGPROGRAM #pragma vertex vertTreeLeaf #pragma fragment frag #pragma target 2.0 #pragma exclude_renderers gles #include "UnityCG.cginc" #include "UnityBuiltin3xTreeLibrary.cginc" v2f vertTreeLeaf(appdata_full v) { v2f o; TreeVertLeaf(v); o.pos = UnityObjectToClipPos(v.vertex); o.uv = v.texcoord; return o; }
ENDCG AlphaTest GEqual[_Cutoff] } }
SubShader { Tags { "ForceSupported" = "True" "RenderType" = "TreeOpaque" } Pass { CGPROGRAM #pragma vertex vertTree #pragma fragment frag #pragma target 2.0 #pragma exclude_renderers gles #include "TerrainEngine.cginc" struct appdata { float4 vertex : POSITION; fixed4 color : COLOR; float2 texcoord : TEXCOORD0; }; v2f vertTree(appdata v) { v2f o; TerrainAnimateTree(v.vertex, v.color.w); o.pos = UnityObjectToClipPos(v.vertex); o.uv = v.texcoord; return o; }
ENDCG } }
SubShader { Tags { "ForceSupported" = "True" "RenderType" = "TreeTransparentCutout" } Pass { Cull Off CGPROGRAM #pragma vertex vertTree #pragma fragment frag #pragma target 2.0 #pragma exclude_renderers gles #include "TerrainEngine.cginc" struct appdata { float4 vertex : POSITION; fixed4 color : COLOR; float4 texcoord : TEXCOORD0; }; v2f vertTree(appdata v) { v2f o; TerrainAnimateTree(v.vertex, v.color.w); o.pos = UnityObjectToClipPos(v.vertex); o.uv = v.texcoord; return o; }
ENDCG AlphaTest GEqual[_Cutoff] } }
SubShader { Tags { "ForceSupported" = "True" "RenderType" = "TreeBillboard" } Pass { Cull Off ZWrite Off CGPROGRAM #pragma vertex vertTree #pragma fragment frag #pragma target 2.0 #pragma exclude_renderers gles #include "TerrainEngine.cginc" v2f vertTree(appdata_tree_billboard v) { v2f o; TerrainBillboardTree(v.vertex, v.texcoord1.xy, v.texcoord.y); o.pos = UnityObjectToClipPos(v.vertex); o.uv.x = v.texcoord.x; o.uv.y = v.texcoord.y & gt; 0; return o; }
ENDCG
SetTexture[_MainTex] { combine primary, Texture } } }
SubShader { Tags { "ForceSupported" = "True" "RenderType" = "GrassBillboard" } Pass { Cull Off CGPROGRAM #pragma vertex vertGrass #pragma fragment fragGrass #pragma target 2.0 #pragma exclude_renderers gles #include "TerrainEngine.cginc" v2fGrass vertGrass(appdata_full v) { v2fGrass o; WavingGrassBillboardVert(v); o.color = v.color; o.pos = UnityObjectToClipPos(v.vertex); o.uv = v.texcoord; return o; }
ENDCG AlphaTest Greater[_Cutoff] } }
SubShader { Tags { "ForceSupported" = "True" "RenderType" = "Grass" } Pass { Cull Off CGPROGRAM #pragma vertex vertGrass #pragma fragment fragGrass #pragma target 2.0 #pragma exclude_renderers gles #include "TerrainEngine.cginc" v2fGrass vertGrass(appdata_full v) { v2fGrass o; WavingGrassVert(v); o.color = v.color; o.pos = UnityObjectToClipPos(v.vertex); o.uv = v.texcoord; return o; }
ENDCG AlphaTest Greater[_Cutoff] } }
Fallback Off }