integrate new shadow system

Author: Shivansps

code/def_files/data/effects/main-f.sdr

@@ -126,7 +126,7 @@ in VertexOutput {
 	vec4 shadowPos;
 #prereplace ENDIF_FLAG_COMPILED MODEL_SDR_FLAG_SHADOWS
 
-#ifdef GL_ES
+#ifndef USE_HW_CLIP_DISTANCE
     float vClipDist;
 #endif
 } vertIn;

code/def_files/data/effects/shadow_map-g.sdr

@@ -1,9 +1,20 @@
 //? #version 150
+#ifdef GL_ES
+#extension GL_EXT_gpu_shader5: enable
+#extension GL_EXT_clip_cull_distance: enable
+precision highp float;
+precision highp int;
+#else
 #extension GL_ARB_gpu_shader5: enable
+#endif
+
+#if !defined(GL_ES) || defined(GL_EXT_clip_cull_distance)
+#define USE_HW_CLIP_DISTANCE
+#endif
 
 layout (triangles) in;
 layout (triangle_strip, max_vertices = 3) out;
-#ifdef GL_ARB_gpu_shader5
+#if defined(GL_ARB_gpu_shader5) || defined(GL_EXT_gpu_shader5)
 layout(invocations = NUM_SHADOW_CASCADES) in;
 #endif
 
@@ -18,16 +29,19 @@ layout (std140) uniform shadowCascadeParams {
 };
 
 in VertexOutput {
-#if !defined(GL_ARB_gpu_shader5)
+#if !defined(GL_ARB_gpu_shader5) && !defined(GL_EXT_gpu_shader5)
     float instance;
 #endif
 	float clipModel;
 	vec3 normal;
+#ifndef USE_HW_CLIP_DISTANCE
+    float vClipDist;
+#endif
 } vertIn[];
 
 void main(void)
 {
-#ifdef GL_ARB_gpu_shader5
+#if defined(GL_ARB_gpu_shader5) || defined(GL_EXT_gpu_shader5)
     if (gl_InvocationID >= cascade_count) return;
     int cascade_id = cascade_offset + gl_InvocationID;
 #else
@@ -43,7 +57,12 @@ void main(void)
 		}
 
 		gl_Layer = cascade_id;
-		gl_ClipDistance[0] = gl_in[vert].gl_ClipDistance[0];
+		
+		#ifndef USE_HW_CLIP_DISTANCE
+			vertOut.vClipDist = vertIn[vert].vClipDist;
+		#else
+			gl_ClipDistance[0] = gl_in[vert].gl_ClipDistance[0];
+		#endif
 
 		EmitVertex();
 	}

code/def_files/data/effects/shadow_map-v.sdr

@@ -1,9 +1,20 @@
 //? #version 150
+#ifdef GL_ES
+#extension GL_EXT_gpu_shader5: enable
+#extension GL_EXT_clip_cull_distance: enable
+precision highp float;
+precision highp int;
+precision highp samplerBuffer;
+#else
 #extension GL_ARB_gpu_shader5: enable
-
 #ifndef GEOMETRY_FALLBACK
 #extension GL_ARB_shader_viewport_layer_array : enable
 #endif
+#endif
+
+#if !defined(GL_ES) || defined(GL_EXT_clip_cull_distance)
+#define USE_HW_CLIP_DISTANCE
+#endif
 
 in vec4 vertPosition;
 in vec4 vertTexCoord;
@@ -33,11 +44,14 @@ uniform samplerBuffer transform_tex;
 
 #ifdef GEOMETRY_FALLBACK
 out VertexOutput {
-#if !defined(GL_ARB_gpu_shader5)
+#if !defined(GL_ARB_gpu_shader5) && !defined(GL_EXT_gpu_shader5)
 	float instance;
 #endif
 	float clipModel;
 	vec3 normal;
+#ifndef USE_HW_CLIP_DISTANCE
+    float vClipDist;
+#endif
 } vertOut;
 #endif
 
@@ -67,7 +81,7 @@ void main()
 	normal = normalize(mat3(modelViewMatrix) * mat3(orient) * vertNormal);
 	position = modelViewMatrix * orient * vertex;
 
-#if !defined(GL_ARB_gpu_shader5)
+#if !defined(GL_ARB_gpu_shader5) && !defined(GL_EXT_gpu_shader5)
  #ifdef APPLE
 	vertOut.instance = float(gl_InstanceIDARB);
  #else
@@ -86,11 +100,19 @@ void main()
         gl_Position = position;
     }
 
+#ifdef USE_HW_CLIP_DISTANCE
 	if (use_clip_plane) {
 		gl_ClipDistance[0] = dot(clip_equation, modelMatrix * orient * vertex);
 	} else {
 		gl_ClipDistance[0] = 1.0;
 	}
+#else
+	if (use_clip_plane) {
+		vertOut.vClipDist = dot(clip_equation, modelMatrix * orient * vertex);
+	} else {
+		vertOut.vClipDist = 1.0;
+	}
+#endif
 
 #ifdef GEOMETRY_FALLBACK
     vertOut.normal = normal;

code/def_files/data/effects/shadows.sdr

@@ -48,7 +48,7 @@ float samplePoissonPCSS(sampler2DArrayShadow shadow_map, vec4 shadowUV, float ma
 	for (int i=0; i<SAMPLES_PCSS; i++) {
 	    vec4 uv = shadowUV;
 	    uv.xy += poissonDisc[i] * maxUVOffset;
-		visibility += texture(shadow_map, uv).r;
+		visibility += texture(shadow_map, uv);
 	}
 	return visibility * (1.0f/float(SAMPLES_PCSS));
 }

code/graphics/opengl/es_compatibility.h

@@ -31,7 +31,7 @@
 #define GL_CLAMP_VERTEX_COLOR					0x891A
 #define GL_CLAMP_FRAGMENT_COLOR					0x891B
 #define GL_FIXED_ONLY							0x891D
-#define GLAD_GL_ARB_shader_viewport_layer_array 0x8DAE // ES 3.2 Core or GL_OES_viewport_array for 3.0/3.1
+#define GLAD_GL_ARB_shader_viewport_layer_array 0 // Disabled, no gl_layer in vertex shader //0x8DAE
 
 //Enums Redefinitions
 #define GL_CLIP_DISTANCE0						GL_CLIP_DISTANCE0_EXT // GL_EXT_clip_cull_distance