fix another revZ problem in ogl

fix another revZ problem in ogl

Author: mmikk

Assets/ScriptableRenderLoop/HDRenderLoop/Lighting/TilePass/ShaderBase.hlsl

@@ -1,6 +1,11 @@
 #ifndef __SHADERBASE_H__
 #define __SHADERBASE_H__
 
+// can't use UNITY_REVERSED_Z since it's not enabled in compute shaders
+#if !defined(SHADER_API_GLES3) && !defined(SHADER_API_GLCORE)
+	#define REVERSE_ZBUF
+#endif
+
 #ifdef SHADER_API_PSSL
 
 #ifndef Texture2DMS
@@ -20,7 +25,7 @@
 float FetchDepth(Texture2D depthTexture, uint2 pixCoord)
 {
 	float zdpth = LOAD_TEXTURE2D(depthTexture, pixCoord.xy).x;
-#if !defined(SHADER_API_GLES3) && !defined(SHADER_API_GLCORE)
+#ifdef REVERSE_ZBUF
 	zdpth = 1.0 - zdpth;
 #endif
 	return zdpth;
@@ -29,7 +34,7 @@ float FetchDepth(Texture2D depthTexture, uint2 pixCoord)
 float FetchDepthMSAA(Texture2DMS<float> depthTexture, uint2 pixCoord, uint sampleIdx)
 {
 	float zdpth = LOAD_TEXTURE2D_MSAA(depthTexture, pixCoord.xy, sampleIdx).x;
-#if !defined(SHADER_API_GLES3) && !defined(SHADER_API_GLCORE)
+#ifdef REVERSE_ZBUF
     zdpth = 1.0 - zdpth;
 #endif
 	return zdpth;

Assets/ScriptableRenderLoop/common/ShaderBase.h

@@ -1,6 +1,11 @@
 #ifndef __SHADERBASE_H__
 #define __SHADERBASE_H__
 
+// can't use UNITY_REVERSED_Z since it's not enabled in compute shaders
+#if !defined(SHADER_API_GLES3) && !defined(SHADER_API_GLCORE)
+	#define REVERSE_ZBUF
+#endif
+
 #ifdef SHADER_API_PSSL
 
 #ifndef Texture2DMS
@@ -32,7 +37,7 @@
 float FetchDepth(Texture2D depthTexture, uint2 pixCoord)
 {
 	float zdpth = depthTexture.Load(uint3(pixCoord.xy, 0)).x;
-#if !defined(SHADER_API_GLES3) && !defined(SHADER_API_GLCORE)
+#ifdef REVERSE_ZBUF
 	zdpth = 1.0 - zdpth;
 #endif
     return zdpth;
@@ -41,7 +46,7 @@ float FetchDepth(Texture2D depthTexture, uint2 pixCoord)
 float FetchDepthMSAA(Texture2DMS<float> depthTexture, uint2 pixCoord, uint sampleIdx)
 {
 	float zdpth = depthTexture.Load(uint3(pixCoord.xy, 0), sampleIdx).x;
-#if !defined(SHADER_API_GLES3) && !defined(SHADER_API_GLCORE)
+#ifdef REVERSE_ZBUF
 	zdpth = 1.0 - zdpth;
 #endif
     return zdpth;

Assets/ScriptableRenderLoop/fptl/LightingTemplate.hlsl

@@ -46,7 +46,11 @@ StructuredBuffer<DirectionalLight> g_dirLightData;
 
 
 #define DECLARE_SHADOWMAP( tex ) Texture2D tex; SamplerComparisonState sampler##tex
-#define SAMPLE_SHADOW( tex, coord ) tex.SampleCmpLevelZero( sampler##tex, (coord).xy, (coord).z )
+#ifdef REVERSE_ZBUF
+	#define SAMPLE_SHADOW( tex, coord ) tex.SampleCmpLevelZero( sampler##tex, (coord).xy, (coord).z )
+#else
+	#define SAMPLE_SHADOW( tex, coord ) tex.SampleCmpLevelZero( sampler##tex, (coord).xy, 1.0-(coord).z )
+#endif
 
 DECLARE_SHADOWMAP(g_tShadowBuffer);