// NOTE! Almost all code in this file and the file InTerra_TerrainLitData is written by Unity and are used because there is no longer the possibility to use the Standard Shader and there would be need to write basically the same Template/LitData for InTerra Shader Functions.
#define HAVE_MESH_MODIFICATION

#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl"
#ifdef TESSELLATION_ON
    #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/GeometricTools.hlsl"
    #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Tessellation.hlsl"
#endif
#include "Packages/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/ShaderPass/FragInputs.hlsl"
#include "Packages/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/ShaderPass/ShaderPass.cs.hlsl"

#if SHADERPASS == SHADERPASS_GBUFFER && !defined(DEBUG_DISPLAY)
    // When we have alpha test, we will force a depth prepass so we always bypass the clip instruction in the GBuffer
    // Don't do it with debug display mode as it is possible there is no depth prepass in this case
    #define SHADERPASS_GBUFFER_BYPASS_ALPHA_TEST
#endif

#if SHADERPASS == SHADERPASS_FORWARD && !defined(_SURFACE_TYPE_TRANSPARENT) && !defined(DEBUG_DISPLAY)
    // In case of opaque we don't want to perform the alpha test, it is done in depth prepass and we use depth equal for ztest (setup from UI)
    // Don't do it with debug display mode as it is possible there is no depth prepass in this case
    #define SHADERPASS_FORWARD_BYPASS_ALPHA_TEST
#endif

#if defined(_ALPHATEST_ON)
    #define ATTRIBUTES_NEED_TEXCOORD0
    #define VARYINGS_NEED_TEXCOORD0
#endif

#if defined(_TERRAIN_NORMAL_IN_MASK)
    #undef _NORMALMAP
    #define _NORMALMAP
#endif

#include "Packages/com.unity.render-pipelines.high-definition/Runtime/ShaderLibrary/ShaderVariables.hlsl"
#ifdef DEBUG_DISPLAY
    #include "Packages/com.unity.render-pipelines.high-definition/Runtime/Debug/DebugDisplay.hlsl"
#endif
#ifdef SCENESELECTIONPASS
    #include "Packages/com.unity.render-pipelines.high-definition/Runtime/ShaderLibrary/PickingSpaceTransforms.hlsl"
#endif
#include "Packages/com.unity.render-pipelines.high-definition/Runtime/Material/Material.hlsl"

#if SHADERPASS == SHADERPASS_FORWARD
    // The light loop (or lighting architecture) is in charge to:
    // - Define light list
    // - Define the light loop
    // - Setup the constant/data
    // - Do the reflection hierarchy
    // - Provide sampling function for shadowmap, ies, cookie and reflection (depends on the specific use with the light loops like index array or atlas or single and texture format (cubemap/latlong))
    #define HAS_LIGHTLOOP
    #include "Packages/com.unity.render-pipelines.high-definition/Runtime/Lighting/Lighting.hlsl"
    #include "Packages/com.unity.render-pipelines.high-definition/Runtime/Lighting/LightLoop/LightLoopDef.hlsl"
    #include "Packages/com.unity.render-pipelines.high-definition/Runtime/Material/Lit/Lit.hlsl"
    #include "Packages/com.unity.render-pipelines.high-definition/Runtime/Lighting/LightLoop/LightLoop.hlsl"
#else
    #include "Packages/com.unity.render-pipelines.high-definition/Runtime/Material/Lit/Lit.hlsl"
#endif

#if SHADERPASS != SHADERPASS_DEPTH_ONLY || defined(WRITE_NORMAL_BUFFER) || defined(TESSELLATION_ON)
    #define ATTRIBUTES_NEED_NORMAL
    #define ATTRIBUTES_NEED_TEXCOORD0
    #define ATTRIBUTES_NEED_TANGENT // will be filled by ApplyMeshModification()
    #if SHADERPASS == SHADERPASS_LIGHT_TRANSPORT
        #define ATTRIBUTES_NEED_TEXCOORD1
        #define ATTRIBUTES_NEED_TEXCOORD2
        #ifdef EDITOR_VISUALIZATION
        #define ATTRIBUTES_NEED_TEXCOORD3
        #define VARYINGS_NEED_TEXCOORD0
        #define VARYINGS_NEED_TEXCOORD1
        #define VARYINGS_NEED_TEXCOORD2
        #define VARYINGS_NEED_TEXCOORD3
        #endif
    #endif
    // Varying - Use for pixel shader
    // This second set of define allow to say which varyings will be output in the vertex (no more tesselation)
    #define VARYINGS_NEED_POSITION_WS
    #define VARYINGS_NEED_TANGENT_TO_WORLD
    #define VARYINGS_NEED_TEXCOORD0
#endif

#if defined(UNITY_INSTANCING_ENABLED) && defined(_TERRAIN_INSTANCED_PERPIXEL_NORMAL)
    #define ENABLE_TERRAIN_PERPIXEL_NORMAL
#endif

#ifdef ENABLE_TERRAIN_PERPIXEL_NORMAL
    // With per-pixel normal enabled, tangent space is created in the pixel shader.
    #undef ATTRIBUTES_NEED_NORMAL
    #undef ATTRIBUTES_NEED_TANGENT
    #undef VARYINGS_NEED_TANGENT_TO_WORLD
#endif

#include "Packages/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/ShaderPass/VaryingMesh.hlsl"
#include "InTerra_TerrainLitData.hlsl"

#if SHADERPASS == SHADERPASS_GBUFFER
#include "Packages/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/ShaderPass/ShaderPassGBuffer.hlsl"
#elif SHADERPASS == SHADERPASS_LIGHT_TRANSPORT
#include "Packages/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/ShaderPass/ShaderPassLightTransport.hlsl"
#elif SHADERPASS == SHADERPASS_SHADOWS || SHADERPASS == SHADERPASS_DEPTH_ONLY
#include "Packages/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/ShaderPass/ShaderPassDepthOnly.hlsl"
#elif SHADERPASS == SHADERPASS_FORWARD
#include "Packages/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/ShaderPass/ShaderPassForward.hlsl"
#endif