Update

resources/main/DefaultShaders.metal

@@ -0,0 +1,38 @@
+#include "OgreUnifiedShader.h"
+
+struct RasterizerData
+{
+  vec4 pos [[position]];
+  vec2 uv;
+};
+
+struct Vertex
+{
+  IN(vec3 pos, POSITION);
+  IN(vec2 uv, TEXCOORD0);
+};
+
+struct Uniform
+{
+  mat4 mvpMtx;
+  mat4 texMtx;
+};
+
+// first 15 slots are reserved for the vertex attributes
+#define UNIFORM_INDEX_START 16
+
+vertex RasterizerData default_vp(Vertex in [[stage_in]],
+                                 constant Uniform& u [[buffer(UNIFORM_INDEX_START)]])
+{
+  RasterizerData out;
+  out.pos = u.mvpMtx * vec4(in.pos, 1);
+  out.uv = (u.texMtx * vec4(in.uv,1,1)).xy;
+  return out;
+}
+
+fragment half4 default_fp(RasterizerData in [[stage_in]],
+                          metal::texture2d<half> tex [[texture(0)]],
+                          metal::sampler s [[sampler(0)]])
+{
+  return tex.sample(s, in.uv);
+}

resources/main/GLSL_GL3Support.glsl

@@ -0,0 +1,97 @@
+// This file is part of the OGRE project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at https://www.ogre3d.org/licensing.
+
+// @public-api
+
+#if defined(OGRE_FRAGMENT_SHADER) && defined(OGRE_GLSLES)
+// define default precisions for ES fragement shaders
+precision mediump float;
+
+#if __VERSION__ > 100
+precision lowp sampler2DArray;
+precision lowp sampler2DShadow;
+precision lowp sampler3D;
+#endif
+#endif
+
+#if __VERSION__ == 100
+mat2 transpose(mat2 m)
+{
+  return mat2(m[0][0], m[1][0],
+              m[0][1], m[1][1]);
+}
+
+mat3 transpose(mat3 m)
+{
+  return mat3(m[0][0], m[1][0], m[2][0],
+              m[0][1], m[1][1], m[2][1],
+              m[0][2], m[1][2], m[2][2]);
+}
+
+mat4 transpose(mat4 m)
+{
+  return mat4(m[0][0], m[1][0], m[2][0], m[3][0],
+              m[0][1], m[1][1], m[2][1], m[3][1],
+              m[0][2], m[1][2], m[2][2], m[3][2],
+              m[0][3], m[1][3], m[2][3], m[3][3]);
+}
+#endif
+
+#if __VERSION__ > 120 || defined(OGRE_GLSLANG)
+#define texture1D texture
+#define texture2D texture
+#define texture3D texture
+#define texture2DArray texture
+#define textureCube texture
+#define shadow2D texture
+#define shadow2DProj textureProj
+#define texture2DProj textureProj
+#define texture2DLod textureLod
+#define textureCubeLod textureLod
+
+#if defined(OGRE_GLSLANG) || (__VERSION__ > 150 && defined(OGRE_VERTEX_SHADER)) || __VERSION__ >= 410
+#define IN(decl, loc) layout(location = loc) in decl;
+#else
+#define IN(decl, loc) in decl;
+#endif
+
+#if defined(OGRE_GLSLANG) || (__VERSION__ > 150 && defined(OGRE_FRAGMENT_SHADER)) || __VERSION__ >= 410
+#define OUT(decl, loc) layout(location = loc) out decl;
+#else
+#define OUT(decl, loc) out decl;
+#endif
+
+#else
+
+#ifdef OGRE_VERTEX_SHADER
+#define IN(decl, loc) attribute decl;
+#define OUT(decl, loc) varying decl;
+#else
+#define IN(decl, loc) varying decl;
+#define OUT(decl, loc) out decl;
+#endif
+
+#endif
+
+#if defined(OGRE_FRAGMENT_SHADER) && (defined(OGRE_GLSLANG) || (__VERSION__ > 130))
+#define gl_FragColor FragColor
+OUT(vec4 FragColor, 0)
+#endif
+
+#ifdef VULKAN
+
+#ifdef OGRE_VERTEX_SHADER
+#define OGRE_UNIFORMS_BEGIN layout(binding = 0, row_major) uniform OgreUniforms {
+#else
+#define OGRE_UNIFORMS_BEGIN layout(binding = 1, row_major) uniform OgreUniforms {
+#endif
+
+#define OGRE_UNIFORMS_END };
+
+#else
+
+#define OGRE_UNIFORMS_BEGIN
+#define OGRE_UNIFORMS_END
+
+#endif

resources/main/HLSL_SM4Support.hlsl

@@ -0,0 +1,98 @@
+// This file is part of the OGRE project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at https://www.ogre3d.org/licensing.
+
+// @public-api
+
+#if OGRE_HLSL >= 4
+
+// SM4 separates sampler into Texture and SamplerState
+
+#define sampler1D Sampler1D
+#define sampler2D Sampler2D
+#define sampler3D Sampler3D
+#define samplerCUBE SamplerCube
+
+struct Sampler1D
+{
+    Texture1D t;
+    SamplerState s;
+};
+struct Sampler2D
+{
+    Texture2D t;
+    SamplerState s;
+};
+struct Sampler3D
+{
+    Texture3D t;
+    SamplerState s;
+};
+struct SamplerCube
+{
+    TextureCube t;
+    SamplerState s;
+};
+
+float4 tex1D(Sampler1D s, float v) { return s.t.Sample(s.s, v); }
+float4 tex2D(Sampler2D s, float2 v) { return s.t.Sample(s.s, v); }
+float4 tex3D(Sampler3D s, float3 v) { return s.t.Sample(s.s, v); }
+float4 texCUBE(SamplerCube s, float3 v) { return s.t.Sample(s.s, v); }
+float4 texCUBElod(SamplerCube s, float4 v) { return s.t.SampleLevel(s.s, v.xyz, v.w); }
+
+float4 tex2D(Sampler2D s, float2 v, float2 ddx, float2 ddy) { return s.t.SampleGrad(s.s, v, ddx, ddy); }
+float4 tex2Dproj(Sampler2D s, float4 v) { return s.t.Sample(s.s, v.xy/v.w); }
+float4 tex2Dlod(Sampler2D s, float4 v) { return s.t.SampleLevel(s.s, v.xy, v.w); }
+
+#define SAMPLER1D(name, reg) \
+    Texture1D name ## Tex : register(t ## reg);\
+    SamplerState name ## State : register(s ## reg);\
+    static Sampler1D name = {name ## Tex, name ## State}
+
+#define SAMPLER2D(name, reg) \
+    Texture2D name ## Tex : register(t ## reg);\
+    SamplerState name ## State : register(s ## reg);\
+    static Sampler2D name = {name ## Tex, name ## State}
+
+#define SAMPLER3D(name, reg) \
+    Texture3D name ## Tex : register(t ## reg);\
+    SamplerState name ## State : register(s ## reg);\
+    static Sampler3D name = {name ## Tex, name ## State}
+
+#define SAMPLERCUBE(name, reg) \
+    TextureCube name ## Tex : register(t ## reg);\
+    SamplerState name ## State : register(s ## reg);\
+    static SamplerCube name = {name ## Tex, name ## State}
+
+// the following are not available in D3D9, but provided for convenience
+struct Sampler2DShadow
+{
+    Texture2D t;
+    SamplerComparisonState s;
+};
+struct Sampler2DArray
+{
+    Texture2DArray t;
+    SamplerState s;
+};
+
+#define SAMPLER2DSHADOW(name, reg) \
+    Texture2D name ## Tex : register(t ## reg);\
+    SamplerComparisonState name ## State : register(s ## reg);\
+    static Sampler2DShadow name = {name ## Tex, name ## State}
+
+#define SAMPLER2DARRAY(name, reg) \
+    Texture2DArray name ## Tex : register(t ## reg);\
+    SamplerState name ## State : register(s ## reg);\
+    static Sampler2DArray name = {name ## Tex, name ## State}
+
+float tex2Dcmp(Sampler2DShadow s, float3 v) { return s.t.SampleCmpLevelZero(s.s, v.xy, v.z); }
+float4 tex2DARRAY(Sampler2DArray s, float3 v) { return s.t.Sample(s.s, v); }
+#else
+
+#define SAMPLER1D(name, reg) sampler1D name : register(s ## reg)
+#define SAMPLER2D(name, reg) sampler2D name : register(s ## reg)
+#define SAMPLER3D(name, reg) sampler3D name : register(s ## reg)
+#define SAMPLERCUBE(name, reg) samplerCUBE name : register(s ## reg)
+
+#endif

resources/main/OgreUnifiedShader.h

@@ -0,0 +1,185 @@
+// This file is part of the OGRE project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at https://www.ogre3d.org/licensing.
+
+// greatly inspired by
+// - shiny: https://ogrecave.github.io/shiny/defining-materials-shaders.html
+// - bgfx: https://github.com/bkaradzic/bgfx/blob/master/src/bgfx_shader.sh
+
+/// general usage:
+// MAIN_PARAMETERS
+// IN(vec4 vertex, POSITION)
+// MAIN_DECLARATION
+// {
+//     GLSL code here
+// }
+
+/// configuration
+// use macros that will be default with Ogre 15
+// #define USE_OGRE_FROM_FUTURE
+
+// @public-api
+
+#if defined(OGRE_HLSL) || defined(OGRE_CG)
+// HLSL
+#include "HLSL_SM4Support.hlsl"
+#define vec2 float2
+#define vec3 float3
+#define vec4 float4
+#define mat3 float3x3
+#define mat4 float4x4
+
+#define ivec2 int2
+#define ivec3 int3
+#define ivec4 int4
+
+#define texture1D tex1D
+#define texture2D tex2D
+#define texture3D tex3D
+#define texture2DArray tex2DARRAY
+#define textureCube texCUBE
+#define shadow2D tex2Dcmp
+#define texture2DProj tex2Dproj
+vec4 texture2DLod(sampler2D s, vec2 v, float lod) { return tex2Dlod(s, vec4(v.x, v.y, 0, lod)); }
+
+#define samplerCube samplerCUBE
+vec4 textureCubeLod(samplerCube s, vec3 v, float lod) { return texCUBElod(s, vec4(v.x, v.y, v.z, lod)); }
+
+#define sampler2DShadow Sampler2DShadow
+
+#define mix lerp
+#define fract frac
+#define inversesqrt rsqrt
+#define dFdx ddx
+#define dFdy ddy
+
+float mod(float _a, float _b) { return _a - _b * floor(_a / _b); }
+vec2  mod(vec2  _a, vec2  _b) { return _a - _b * floor(_a / _b); }
+vec3  mod(vec3  _a, vec3  _b) { return _a - _b * floor(_a / _b); }
+vec4  mod(vec4  _a, vec4  _b) { return _a - _b * floor(_a / _b); }
+
+vec2 vec2_splat(float x) { return vec2(x, x); }
+vec3 vec3_splat(float x) { return vec3(x, x, x); }
+vec4 vec4_splat(float x) { return vec4(x, x, x, x); }
+
+mat4 mtxFromRows(vec4 a, vec4 b, vec4 c, vec4 d)
+{
+    return mat4(a, b, c, d);
+}
+
+mat3 mtxFromRows(vec3 a, vec3 b, vec3 c)
+{
+    return mat3(a, b, c);
+}
+
+mat3 mtxFromCols(vec3 a, vec3 b, vec3 c)
+{
+    return transpose(mat3(a, b, c));
+}
+
+#define STATIC static
+
+#define OGRE_UNIFORMS_BEGIN
+#define OGRE_UNIFORMS_END
+
+#define MAIN_PARAMETERS void main(
+
+#ifdef OGRE_VERTEX_SHADER
+#define MAIN_DECLARATION out float4 gl_Position : POSITION)
+#else
+#define MAIN_DECLARATION in float4 gl_FragCoord : POSITION, out float4 gl_FragColor : COLOR)
+#endif
+
+#define IN(decl, sem) in decl : sem,
+#define OUT(decl, sem) out decl : sem,
+#elif defined(OGRE_METAL)
+#define vec2 float2
+#define vec3 float3
+#define vec4 float4
+#define mat3 metal::float3x3
+#define mat4 metal::float4x4
+
+#define IN(decl, sem) decl [[ attribute(sem) ]];
+#else
+// GLSL
+#include "GLSL_GL3Support.glsl"
+
+#ifdef VULKAN
+#define _UNIFORM_BINDING(b) layout(binding = b + 2) uniform
+#elif __VERSION__ >= 420
+#define _UNIFORM_BINDING(b) layout(binding = b) uniform
+#else
+#define _UNIFORM_BINDING(b) uniform
+#endif
+
+#define SAMPLER1D(name, reg) _UNIFORM_BINDING(reg) sampler1D name
+#define SAMPLER2D(name, reg) _UNIFORM_BINDING(reg) sampler2D name
+#define SAMPLER3D(name, reg) _UNIFORM_BINDING(reg) sampler3D name
+#define SAMPLER2DARRAY(name, reg) _UNIFORM_BINDING(reg) sampler2DArray name
+#define SAMPLERCUBE(name, reg) _UNIFORM_BINDING(reg) samplerCube name
+#define SAMPLER2DSHADOW(name, reg) _UNIFORM_BINDING(reg) sampler2DShadow name
+
+#define saturate(x) clamp(x, 0.0, 1.0)
+#define mul(a, b) ((a) * (b))
+
+#define vec2_splat vec2
+#define vec3_splat vec3
+#define vec4_splat vec4
+
+mat4 mtxFromRows(vec4 a, vec4 b, vec4 c, vec4 d)
+{
+    return transpose(mat4(a, b, c, d));
+}
+
+mat3 mtxFromRows(vec3 a, vec3 b, vec3 c)
+{
+    return transpose(mat3(a, b, c));
+}
+
+mat3 mtxFromCols(vec3 a, vec3 b, vec3 c)
+{
+    return mat3(a, b, c);
+}
+
+#define STATIC
+
+#define MAIN_PARAMETERS
+#define MAIN_DECLARATION void main()
+
+#endif
+
+#if !defined(OGRE_HLSL) && !defined(OGRE_CG)
+// semantics as aliases for attribute locations
+#define POSITION    0
+#define BLENDWEIGHT 1
+#define NORMAL      2
+#define COLOR0      3
+#define COLOR1      4
+#define COLOR COLOR0
+#define FOG         5
+#define BLENDINDICES 7
+#define TEXCOORD0   8
+#define TEXCOORD1   9
+#define TEXCOORD2  10
+#define TEXCOORD3  11
+#define TEXCOORD4  12
+#define TEXCOORD5  13
+#define TEXCOORD6  14
+#define TEXCOORD7  15
+#define TANGENT    14
+#endif
+
+#define OGRE_UNIFORMS(params) OGRE_UNIFORMS_BEGIN params OGRE_UNIFORMS_END
+
+// GL_EXT_shader_explicit_arithmetic_types polyfill
+#ifdef OGRE_GLSLES
+#define float32_t highp float
+#define f32vec2 highp vec2
+#define f32vec3 highp vec3
+#define f32vec4 highp vec4
+#else
+#define float32_t float
+#define f32vec2 vec2
+#define f32vec3 vec3
+#define f32vec4 vec4
+#endif

resources/main/Shadow.material

@@ -0,0 +1,85 @@
+// This file is part of the OGRE project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at https://www.ogre3d.org/licensing.
+
+material Ogre/TextureShadowCaster
+{
+    receive_shadows false
+    technique
+    {
+        pass
+        {
+            // Lighting has to be on, because we need shadow coloured objects
+            // Note that because we can't predict vertex programs, we'll have to
+            // bind light values to those, and so we bind White to ambient
+            // reflectance, and we'll set the ambient colour to the shadow colour
+            ambient 1 1 1
+            diffuse 0 0 0
+            specular 0 0 0 1
+            emissive 0 0 0
+            fog_override true none
+            // set depth bias in case this is used with PF_DEPTH
+            depth_bias -1 -1
+        }
+    }
+}
+
+material Ogre/StencilShadowModulationPass
+{
+    technique
+    {
+        pass
+        {
+            lighting off
+            scene_blend modulate
+            depth_write off
+            depth_check off
+            cull_hardware none
+
+            vertex_program_ref Ogre/ShadowBlendVP {}
+            fragment_program_ref Ogre/ShadowBlendFP {}
+            texture_unit {}
+        }
+    }
+}
+
+material Ogre/StencilShadowVolumes
+{
+    technique
+    {
+        pass
+        {
+            // program will be set dynamically to match light type
+            vertex_program_ref Ogre/ShadowExtrudeDirLightFinite
+            {
+                // however, the parameters here are shared between all programs
+                param_named_auto worldviewproj_matrix worldviewproj_matrix
+                param_named_auto light_position_object_space light_position_object_space 0
+                param_named_auto shadow_extrusion_distance shadow_extrusion_distance 0
+            }
+            fragment_program_ref Ogre/ShadowBlendFP {}
+        }
+    }
+}
+
+material Ogre/Debug/ShadowVolumes
+{
+    technique
+    {
+        pass
+        {
+            depth_write off
+            scene_blend add
+            cull_hardware none
+
+            // program will be set dynamically to match light type
+            vertex_program_ref Ogre/ShadowExtrudeDirLight
+            {
+                // however, the parameters here are shared between all programs
+                param_named_auto worldviewproj_matrix worldviewproj_matrix
+                param_named_auto light_position_object_space light_position_object_space 0
+            }
+            fragment_program_ref Ogre/ShadowBlendFP {}
+        }
+    }
+}

resources/main/ShadowBlend.frag

@@ -0,0 +1,11 @@
+#include <OgreUnifiedShader.h>
+
+OGRE_UNIFORMS(
+    uniform vec4 shadowColor;
+)
+
+MAIN_PARAMETERS
+MAIN_DECLARATION
+{
+    gl_FragColor = shadowColor;
+}

resources/main/ShadowBlend.vert

@@ -0,0 +1,12 @@
+#include <OgreUnifiedShader.h>
+
+OGRE_UNIFORMS(
+    uniform mat4 worldViewProj;
+)
+
+MAIN_PARAMETERS
+IN(vec4 vertex, POSITION)
+MAIN_DECLARATION
+{
+    gl_Position = mul(worldViewProj, vertex);
+}

resources/main/ShadowExtrudeDirLight.vert

@@ -0,0 +1,18 @@
+#include <OgreUnifiedShader.h>
+
+// Directional light extrude
+uniform mat4 worldviewproj_matrix;
+uniform vec4 light_position_object_space; // homogenous, object space
+
+MAIN_PARAMETERS
+IN(vec4 uv0, TEXCOORD0)
+IN(vec4 position, POSITION)
+MAIN_DECLARATION
+{
+    // Extrusion in object space
+    // Vertex unmodified if w==1, extruded if w==0
+    vec4 newpos =
+        (uv0.xxxx * (position + light_position_object_space)) - light_position_object_space;
+
+    gl_Position = mul(worldviewproj_matrix, newpos);
+}

resources/main/ShadowExtrudeDirLightFinite.vert

@@ -0,0 +1,22 @@
+#include <OgreUnifiedShader.h>
+
+// Directional light extrude - FINITE
+uniform mat4 worldviewproj_matrix;
+uniform vec4 light_position_object_space; // homogenous, object space
+uniform float shadow_extrusion_distance;  // how far to extrude
+
+MAIN_PARAMETERS
+IN(vec4 uv0, TEXCOORD0)
+IN(vec4 position, POSITION)
+MAIN_DECLARATION
+{
+    // Extrusion in object space
+    // Vertex unmodified if w==1, extruded if w==0
+    vec3 extrusionDir = - light_position_object_space.xyz;
+    extrusionDir = normalize(extrusionDir);
+
+    vec4 newpos = vec4(position.xyz +
+        ((1.0 - uv0.x) * shadow_extrusion_distance * extrusionDir), 1.0);
+
+    gl_Position = mul(worldviewproj_matrix, newpos);
+}

resources/main/ShadowExtrudePointLight.vert

@@ -0,0 +1,19 @@
+#include <OgreUnifiedShader.h>
+
+// Point light shadow volume extrude
+uniform mat4 worldviewproj_matrix;
+uniform vec4 light_position_object_space; // homogenous, object space
+
+MAIN_PARAMETERS
+IN(vec4 uv0, TEXCOORD0)
+IN(vec4 position, POSITION)
+MAIN_DECLARATION
+{
+    // Extrusion in object space
+    // Vertex unmodified if w==1, extruded if w==0
+    vec4 newpos =
+        (uv0.xxxx * light_position_object_space) +
+        vec4(position.xyz - light_position_object_space.xyz, 0.0);
+
+    gl_Position = mul(worldviewproj_matrix, newpos);
+}

resources/main/ShadowExtrudePointLightFinite.vert

@@ -0,0 +1,22 @@
+#include <OgreUnifiedShader.h>
+
+// Point light shadow volume extrude - FINITE
+uniform mat4 worldviewproj_matrix;
+uniform vec4 light_position_object_space; // homogenous, object space
+uniform float shadow_extrusion_distance; // how far to extrude
+
+MAIN_PARAMETERS
+IN(vec4 uv0, TEXCOORD0)
+IN(vec4 position, POSITION)
+MAIN_DECLARATION
+{
+    // Extrusion in object space
+    // Vertex unmodified if w==1, extruded if w==0
+    vec3 extrusionDir = position.xyz - light_position_object_space.xyz;
+    extrusionDir = normalize(extrusionDir);
+
+    vec4 newpos = vec4(position.xyz +
+        ((1.0 - uv0.x) * shadow_extrusion_distance * extrusionDir), 1.0);
+
+    gl_Position = mul(worldviewproj_matrix, newpos);
+}

resources/main/ShadowVolumeExtude.program

@@ -0,0 +1,41 @@
+// This file is part of the OGRE project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at https://www.ogre3d.org/licensing.
+
+vertex_program Ogre/ShadowBlendVP glsl glsles hlsl glslang
+{
+    source ShadowBlend.vert
+    default_params
+    {
+        param_named_auto worldViewProj worldviewproj_matrix
+    }
+}
+
+fragment_program Ogre/ShadowBlendFP glsl glsles hlsl glslang
+{
+    source ShadowBlend.frag
+    default_params
+    {
+        param_named_auto shadowColor shadow_colour
+    }
+}
+
+vertex_program Ogre/ShadowExtrudePointLight glsl glsles hlsl
+{
+    source ShadowExtrudePointLight.vert
+}
+
+vertex_program Ogre/ShadowExtrudeDirLight glsl glsles hlsl
+{
+    source ShadowExtrudeDirLight.vert
+}
+
+vertex_program Ogre/ShadowExtrudePointLightFinite glsl glsles hlsl
+{
+    source ShadowExtrudePointLightFinite.vert
+}
+
+vertex_program Ogre/ShadowExtrudeDirLightFinite glsl glsles hlsl
+{
+    source ShadowExtrudeDirLightFinite.vert
+}