Add GLES2 backend to runtime

Task-number: BOUL-789
Change-Id: I4a076b6a56860275d3ea89dd4d6709cb14fb1c40
Reviewed-by: Tomi Korpipää <tomi.korpipaa@qt.io>
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>

8 files changed, 951 insertions, 0 deletions

diff --git a/src/Runtime/res/effectlib/gles2/SSAOCustomMaterial.glsllib b/src/Runtime/res/effectlib/gles2/SSAOCustomMaterial.glsllib
new file mode 100644
index 00000000..d3994a61
--- /dev/null
+++ b/src/Runtime/res/effectlib/gles2/SSAOCustomMaterial.glsllib
@@ -0,0 +1,100 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 NVIDIA Corporation.
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt 3D Studio.
+**
+** $QT_BEGIN_LICENSE:GPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 or (at your option) any later version
+** approved by the KDE Free Qt Foundation. The licenses are as published by
+** the Free Software Foundation and appearing in the file LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef SSAO_CUSTOM_MATERIAL_GLSLLIB
+#define SSAO_CUSTOM_MATERIAL_GLSLLIB
+
+#ifndef UIC_ENABLE_SSAO
+#define UIC_ENABLE_SSAO 0
+#endif
+
+#ifndef UIC_ENABLE_SSDO
+#define UIC_ENABLE_SSDO 0
+#endif
+
+#if UIC_ENABLE_SSAO || UIC_ENABLE_SSDO
+
+#include "viewProperties.glsllib"
+#if UIC_ENABLE_SSDO
+#include "screenSpaceDO.glsllib"
+
+
+uniform vec4 ao_properties;
+uniform vec4 ao_properties2;
+uniform vec4 shadow_properties;
+uniform vec4 aoScreenConst;
+uniform vec4 UvToEyeConst;
+
+
+uniform sampler2D depth_sampler;
+#endif
+uniform sampler2D ao_sampler;
+uniform vec2 ao_sampler_size;
+
+#endif  // UIC_ENABLE_SSAO || UIC_ENABLE_SSDO
+
+#if UIC_ENABLE_SSAO
+
+float customMaterialAO()
+{
+#if UIC_ENABLE_SSDO
+    vec2 smpUV = (gl_FragCoord.xy) * aoScreenConst.zw;
+#else
+    vec2 smpUV = gl_FragCoord.xy / ao_sampler_size;
+#endif
+    return texture(ao_sampler, smpUV).x;
+}
+
+#else
+
+float customMaterialAO()
+{
+    return 1.0;
+}
+
+#endif
+
+#if UIC_ENABLE_SSDO
+
+float customMaterialShadow( vec3 lightDir, vec3 varWorldPos )
+{
+    return shadowOcclusion( depth_sampler, lightDir, varWorldPos, view_matrix, view_projection_matrix, shadow_properties, camera_properties, aoScreenConst, UvToEyeConst );
+}
+
+#else
+
+float customMaterialShadow( vec3 lightDir, vec3 varWorldPos )
+{
+    return 1.0;
+}
+
+#endif
+
+#endif  // #ifndef SSAO_CUSTOM_MATERIAL_GLSLLIB
diff --git a/src/Runtime/res/effectlib/gles2/defaultMaterialBumpNoLod.glsllib b/src/Runtime/res/effectlib/gles2/defaultMaterialBumpNoLod.glsllib
new file mode 100644
index 00000000..2f3bd150
--- /dev/null
+++ b/src/Runtime/res/effectlib/gles2/defaultMaterialBumpNoLod.glsllib
@@ -0,0 +1,52 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt 3D Studio.
+**
+** $QT_BEGIN_LICENSE:GPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 or (at your option) any later version
+** approved by the KDE Free Qt Foundation. The licenses are as published by
+** the Free Software Foundation and appearing in the file LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+float calcRGBAvg(in vec4 rgba)
+{
+    return (rgba.r + rgba.g + rgba.b) / 3.0;
+}
+
+vec3 defaultMaterialBumpNoLod(in sampler2D sampler, in float factor,
+                              in vec2 texCoord, in vec3 tangent, in vec3 binormal,
+                              in vec3 normal, in vec2 bumpSize )
+{
+    // invert factor
+    float invFactor = -factor;
+
+    vec2 unitStep = 1.0 / bumpSize;
+
+    float du = calcRGBAvg(texture2D( sampler, vec2( texCoord.x + unitStep.x, texCoord.y )))
+             - calcRGBAvg(texture2D( sampler, vec2( texCoord.x, texCoord.y )));
+    float dv = calcRGBAvg(texture2D( sampler, vec2( texCoord.x, texCoord.y + unitStep.y )))
+             - calcRGBAvg(texture2D( sampler, vec2( texCoord.x, texCoord.y )));
+
+    vec3 n = normalize(vec3(invFactor * du, invFactor * dv, 1.0));
+    n = n.x * normalize(tangent) + n.y * normalize(binormal) + n.z * normal;
+    return normalize(normal + n);
+}
diff --git a/src/Runtime/res/effectlib/gles2/funcareaLightVars.glsllib b/src/Runtime/res/effectlib/gles2/funcareaLightVars.glsllib
new file mode 100644
index 00000000..cdb8c92a
--- /dev/null
+++ b/src/Runtime/res/effectlib/gles2/funcareaLightVars.glsllib
@@ -0,0 +1,29 @@
+#define MAX_AREA_LIGHTS 16
+
+// note this struct must exactly match the memory layout of the
+// struct SLightSourceShader in the source code. If you make changes here you need
+// to adjust the struct SLightSourceShader as well
+struct AreaLight
+{
+    vec4  position;
+    vec4  direction;              // Specifies the light direction in world coordinates.
+    vec4  up;
+    vec4  right;
+    vec4  diffuse;
+    vec4  ambient;
+    vec4  specular;
+    float spotExponent;           // Specifies the intensity distribution of the light.
+    float spotCutoff;             // Specifies the maximum spread angle of the light.
+    float constantAttenuation;    // Specifies the constant light attenuation factor.
+    float linearAttenuation;      // Specifies the linear light attenuation factor.
+    float quadraticAttenuation;   // Specifies the quadratic light attenuation factor.
+    float range;                  // Specifies the maximum distance of the light influence
+    float width;                  // Specifies the width of the area light surface.
+    float height;                 // Specifies the height of the area light surface;
+    vec4  shadowControls;
+    mat4  shadowView;
+    int   shadowIdx;
+};
+
+uniform int uNumAreaLights;
+uniform AreaLight arealights[MAX_AREA_LIGHTS];
diff --git a/src/Runtime/res/effectlib/gles2/funcsampleLightVars.glsllib b/src/Runtime/res/effectlib/gles2/funcsampleLightVars.glsllib
new file mode 100644
index 00000000..6cb0d831
--- /dev/null
+++ b/src/Runtime/res/effectlib/gles2/funcsampleLightVars.glsllib
@@ -0,0 +1,27 @@
+
+#define MAX_NUM_LIGHTS 16
+
+struct LightSource
+{
+    vec4  position;
+    vec4  direction;              // Specifies the light direction in world coordinates.
+    vec4  up;
+    vec4  right;
+    vec4  diffuse;
+    vec4  ambient;
+    vec4  specular;
+    float spotExponent;           // Specifies the intensity distribution of the light.
+    float spotCutoff;             // Specifies the maximum spread angle of the light.
+    float constantAttenuation;    // Specifies the constant light attenuation factor.
+    float linearAttenuation;      // Specifies the linear light attenuation factor.
+    float quadraticAttenuation;   // Specifies the quadratic light attenuation factor.
+    float range;                  // Specifies the maximum distance of the light influence
+    float width;                  // Specifies the width of the area light surface.
+    float height;                 // Specifies the height of the area light surface;
+    vec4  shadowControls;
+    mat4  shadowView;
+    int   shadowIdx;
+};
+
+uniform int uNumLights;
+uniform LightSource lights[MAX_NUM_LIGHTS];
diff --git a/src/Runtime/res/effectlib/gles2/monoChannel.glsllib b/src/Runtime/res/effectlib/gles2/monoChannel.glsllib
new file mode 100644
index 00000000..1460aae1
--- /dev/null
+++ b/src/Runtime/res/effectlib/gles2/monoChannel.glsllib
@@ -0,0 +1,58 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 NVIDIA Corporation.
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt 3D Studio.
+**
+** $QT_BEGIN_LICENSE:GPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 or (at your option) any later version
+** approved by the KDE Free Qt Foundation. The licenses are as published by
+** the Free Software Foundation and appearing in the file LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef MONO_CHANNEL_GLSLLIB
+#define MONO_CHANNEL_GLSLLIB
+
+#ifdef UIC_DEFINE_API
+#define mono_alpha 0
+#define mono_average 1
+#define mono_luminance 2
+#define mono_maximum 3
+#endif
+
+float monoChannel( in vec4 t, const in int monoSource )
+{
+    if ( monoSource == mono_alpha )
+        return( t.w );
+
+    if ( monoSource == mono_average )
+        return( ( t.x + t.y + t.z ) / 3.0 );
+
+    if ( monoSource == mono_luminance )
+        return( luminance( t.xyz ) );
+
+    if ( monoSource == mono_maximum )
+        return( max( t.x, max( t.y, t.z ) ) );
+
+    return( 1.0 );
+}
+
+#endif
diff --git a/src/Runtime/res/effectlib/gles2/sampleProbe.glsllib b/src/Runtime/res/effectlib/gles2/sampleProbe.glsllib
new file mode 100644
index 00000000..4b328183
--- /dev/null
+++ b/src/Runtime/res/effectlib/gles2/sampleProbe.glsllib
@@ -0,0 +1,482 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 NVIDIA Corporation.
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt 3D Studio.
+**
+** $QT_BEGIN_LICENSE:GPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 or (at your option) any later version
+** approved by the KDE Free Qt Foundation. The licenses are as published by
+** the Free Software Foundation and appearing in the file LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef SAMPLE_PROBE_GLSLLIB
+#define SAMPLE_PROBE_GLSLLIB 1
+
+#ifndef UIC_ENABLE_LIGHT_PROBE_2
+#define UIC_ENABLE_LIGHT_PROBE_2 0
+#endif
+
+#ifndef UIC_ENABLE_IBL_FOV
+#define UIC_ENABLE_IBL_FOV 0
+#endif
+
+uniform sampler2D light_probe;
+uniform vec4 light_probe_props;
+uniform vec4 light_probe_rotation;
+uniform vec4 light_probe_offset;    // light_probe_offset.w = number of mipmaps
+uniform vec2 light_probe_size;
+
+#if UIC_ENABLE_LIGHT_PROBE_2
+uniform sampler2D light_probe2;
+uniform vec4 light_probe2_props;
+uniform vec2 light_probe2_size;
+#endif
+
+#if UIC_ENABLE_IBL_FOV
+uniform vec4 light_probe_opts;
+#endif
+
+float noise1d(vec2 n)
+{
+    return 0.5 + 0.5 * fract(sin(dot(n.xy, vec2(12.9898, 78.233)))* 43758.5453);
+}
+
+mat3 orthoNormalize( in mat3 tanFrame )
+{
+   mat3 outMat;
+   outMat[0] = normalize( cross( tanFrame[1], tanFrame[2] ) );
+   outMat[1] = normalize( cross( tanFrame[2], outMat[0] ) );
+   outMat[2] = tanFrame[2];
+
+   return outMat;
+}
+
+mat3 tangentFrame( vec3 N, vec3 p )
+{
+    // get edge vectors of the pixel triangle
+    vec3 dp1 = dFdx( p );
+    vec3 dp2 = dFdy( p );
+    // Using dPdu and dPdv would be nicer, but the nature of our materials
+    // are not ones with intrinsic UVs, so we can't really go there.
+//    vec2 duv1 = dFdx( uv );
+//    vec2 duv2 = dFdy( uv );
+
+    // solve the linear system
+    vec3 dp2perp = cross( dp2, N );
+    vec3 dp1perp = cross( N, dp1 );
+//    vec3 T = dp2perp * duv1.x + dp1perp * duv2.x;
+//    vec3 B = dp2perp * duv1.y + dp1perp * duv2.y;
+
+    vec3 T = normalize(dp1perp);
+    vec3 B = normalize(dp2perp);
+    return mat3( T , B , N );
+}
+
+vec2 transformSample( vec2 origUV, vec4 probeRot, vec2 probeOfs )
+{
+    vec2 retUV;
+    retUV.x = dot( vec3(origUV, 1.0), vec3(probeRot.xy, probeOfs.x) );
+    retUV.y = dot( vec3(origUV, 1.0), vec3(probeRot.zw, probeOfs.y) );
+    return retUV;
+}
+
+// This is broken out into its own routine so that if we get some other
+// format image than a lat-long, then we can account for that by changing
+// the code here alone.
+vec2 getProbeSampleUV( vec3 smpDir, vec4 probeRot, vec2 probeOfs )
+{
+    vec2 smpUV;
+
+#if UIC_ENABLE_IBL_FOV
+    smpUV.x = (2.0 * atan(-smpDir.z, smpDir.x) + 3.14159265358 ) / light_probe_opts.x;
+    smpUV.y = (2.0 * atan(-smpDir.z, smpDir.y) + 3.14159265358 ) / light_probe_opts.x;
+#else
+    smpUV.x = atan( smpDir.x, -smpDir.z) / 3.14159265359;
+    smpUV.y = 1.0 - (acos(smpDir.y) / 1.57079632679);
+#endif
+    smpUV = transformSample( smpUV.xy * 0.5, probeRot, probeOfs ) + vec2(0.5, 0.5);
+
+    return smpUV;
+}
+
+vec4 getTopLayerSample( vec3 inDir, float lodShift, vec3 lodOffsets )
+{
+#if UIC_ENABLE_LIGHT_PROBE_2
+    if ( light_probe2_props.w < 0.5 )
+        return vec4(0.0, 0.0, 0.0, 0.0);
+
+    vec2 smpUV = getProbeSampleUV( inDir, vec4(1.0, 0.0, 0.0, 1.0), light_probe_props.xy );
+    smpUV.x -= 0.5;
+    smpUV.x *= light_probe2_props.x;
+    smpUV.x += light_probe2_props.y;
+
+    vec4 retVal = 0.4 * textureLod( light_probe2, smpUV , lodShift );
+    retVal += 0.2 * textureLod( light_probe2, smpUV , lodShift+lodOffsets.x );
+    retVal += 0.3 * textureLod( light_probe2, smpUV , lodShift+lodOffsets.y );
+    retVal += 0.1 * textureLod( light_probe2, smpUV , lodShift+lodOffsets.z );
+    return retVal;
+#else
+    return vec4(0.0, 0.0, 0.0, 0.0);
+#endif
+}
+
+vec3 getProbeSample( vec3 smpDir, float lodShift, vec3 normal )
+{
+    vec2 smpUV = getProbeSampleUV( smpDir, light_probe_rotation, light_probe_offset.xy );
+    return textureLod( light_probe, smpUV , lodShift ).xyz;
+}
+
+vec3 getProbeWeightedSample( vec3 smpDir, float lodShift, float roughness, vec3 normal )
+{
+    // This gives us a weighted sum that approximates the total filter support
+    // of the full-blown convolution.
+    vec2 smpUV = getProbeSampleUV( smpDir, light_probe_rotation, light_probe_offset.xy );
+    float wt = 1.0;
+
+#if UIC_ENABLE_IBL_FOV
+    wt = min(wt, smoothstep(roughness * -0.25, roughness * 0.25, smpUV.x));
+    wt = min(wt, smoothstep(roughness * -0.25, roughness * 0.25, smpUV.y));
+    wt = min(wt, 1.0 - smoothstep(1.0 - roughness*0.25, 1.0 + roughness*0.25, smpUV.x));
+    wt = min(wt, 1.0 - smoothstep(1.0 - roughness*0.25, 1.0 + roughness*0.25, smpUV.y));
+#endif
+
+    vec3 lodOffsets;
+    lodOffsets.x = mix(-2.0, -0.70710678, roughness);
+    lodOffsets.y = min( 2.0 * smoothstep(0.0, 0.1, roughness), 2.0 - 1.29289 * smoothstep(0.1, 1.0, roughness) );
+    lodOffsets.z = min( 6.0 * smoothstep(0.0, 0.1, roughness), 6.0 - 4.585786 * smoothstep(0.1, 1.0, roughness) );
+
+    ivec2 iSize = ivec2(light_probe_size);
+    vec3 ddx = dFdx( smpDir ) * float(iSize.x);
+    vec3 ddy = dFdy( smpDir ) * float(iSize.y);
+//    vec2 ddxUV = dFdx( smpUV ) * float(iSize.x);
+//    vec2 ddyUV = dFdy( smpUV ) * float(iSize.y);
+
+    vec2 deriv;
+    deriv.x = max( dot(ddx, ddx), dot(ddy, ddy) );
+//    deriv.y = max( dot(ddxUV, ddxUV), dot(ddyUV, ddyUV) );
+    deriv = clamp( deriv, vec2(1.0), vec2(iSize.x * iSize.y) );
+    vec2 lodBound = 0.5 * log2( deriv ) - vec2(1.0);
+
+//    float minLod = 0.5 * (lodBound.x + lodBound.y);
+    float minLod = lodBound.x;
+    float maxLod = log2( max(float(iSize.x), float(iSize.y)) );
+    minLod = clamp( minLod / maxLod, 0.0, 1.0 );
+    minLod *= minLod * maxLod;
+
+    lodShift = max( lodShift, minLod );
+
+    vec3 retVal = 0.4 * textureLod( light_probe, smpUV , lodShift ).xyz;
+    retVal += 0.2 * textureLod( light_probe, smpUV , max(minLod, lodShift+lodOffsets.x) ).xyz;
+    retVal += 0.3 * textureLod( light_probe, smpUV , lodShift+lodOffsets.y ).xyz;
+    retVal += 0.1 * textureLod( light_probe, smpUV , lodShift+lodOffsets.z ).xyz;
+
+#if UIC_ENABLE_LIGHT_PROBE_2
+    vec4 topSmp = getTopLayerSample( smpDir, lodShift, lodOffsets );
+    vec3 tempVal = mix( retVal, topSmp.xyz, topSmp.w );
+    retVal = mix( retVal, tempVal, light_probe2_props.z );
+#endif
+
+    if (light_probe_props.z > -1.0) {
+        float ctr = 0.5 + 0.5 * light_probe_props.z;
+        float vertWt = smoothstep(ctr-roughness*0.25, ctr+roughness*0.25, smpUV.y);
+        float wtScaled = mix(1.0, vertWt, light_probe_props.z + 1.0);
+        retVal *= wtScaled;
+    }
+
+    return retVal * wt;
+}
+
+vec2 textureSizeLod( vec2 size, int level )
+{
+    return size / pow(2.0, float(level));
+}
+
+vec3 getProbeAnisoSample( vec3 smpDir, float roughU, float roughV, mat3 tanFrame )
+{
+    float minRough = min(roughU, roughV);
+    float maxRough = max(roughU, roughV);
+
+    float lodMin = log2( (minRough*3.0 + maxRough)*0.25 ) + (light_probe_offset.w - 2.0);
+
+    float ratio = clamp( maxRough / minRough, 1.01, 27.0);
+    vec2 texSize = textureSizeLod( light_probe_size, int(floor( lodMin )) );
+    texSize = mix( texSize, texSize * 0.5, fract(lodMin) );
+
+    // Boundary of 1.0..9.0 is just to keep the number of samples to within a
+    // reasonable number of samples in the filter.  Similarly, with the clamping
+    // of the ratio to a max of 27.0 is just to prevent the step size in the filter
+    // to be no bigger than 3 texels (beyond which, there are some artifacts at high
+    // roughness, aka low texture res).
+    float stepFig = clamp(floor( ratio ), 1.0, 9.0);
+
+    // numSteps is half the number of samples we need to take, which makes it
+    // the number of steps to take on each side.
+    int numSteps = int( floor(stepFig * 0.5) );
+
+    vec2 smpUV = getProbeSampleUV( smpDir, light_probe_rotation, light_probe_offset.xy );
+    vec4 result = vec4(0.0);
+
+    vec3 smpDirOfs = (maxRough == roughU) ? 0.01 * tanFrame[0] : 0.01 * tanFrame[1];
+    vec2 stepPos = getProbeSampleUV(normalize(smpDir + smpDirOfs), light_probe_rotation, light_probe_offset.xy);
+    vec2 stepNeg = getProbeSampleUV(normalize(smpDir - smpDirOfs), light_probe_rotation, light_probe_offset.xy);
+    stepPos -= smpUV;     stepNeg -= smpUV;
+    stepPos *= texSize;   stepNeg *= texSize;
+
+    // This ensures that we step along a size that makes sense even if one of the two
+    // sammpling directions wraps around the edges of the IBL texture.
+    smpDirOfs /= min( length(stepPos), length(stepNeg) );
+    smpDirOfs *= ratio / stepFig;
+
+    float sigma = mix(0.0, 2.0, ratio / 27.0);
+    sigma *= sigma;
+
+    float wt = (1.0 / (ratio - 1.0)) + 1.0;
+    result.xyz += wt * getProbeWeightedSample( smpDir, lodMin, minRough, tanFrame[2] );
+    result.w += wt;
+    for (int i = 0; i < numSteps; ++i)
+    {
+        wt = sigma / (sigma + float(i * i));
+        vec2 uv0 = getProbeSampleUV(normalize(smpDir + smpDirOfs * float(i)), light_probe_rotation, light_probe_offset.xy);
+        vec2 uv1 = getProbeSampleUV(normalize(smpDir - smpDirOfs * float(i)), light_probe_rotation, light_probe_offset.xy);
+        result.xyz += wt * textureLod( light_probe, uv0 , lodMin ).xyz;
+        result.w += wt;
+        result.xyz += wt * textureLod( light_probe, uv1 , lodMin ).xyz;
+        result.w += wt;
+    }
+
+    result /= result.w;
+    return result.xyz;
+}
+
+vec4 sampleDiffuse( mat3 tanFrame )
+{
+    if ( light_probe_props.w < 0.005 )
+        return vec4( 0.0 );
+
+//    if ( light_probe_offset.w > 0.5 )
+//    {
+        // The LOD offset comes from the assumption that a full diffuse convolution
+        // has a support of pi/2, which translates into x pixels, and the base 2 log
+        // gives us this LOD...  Technically, "x" pixels depends on what the original
+        // texture resolution was, which is why we use light_probe_offset.w, which holds
+        // the number of mip levels the texture has.
+
+        return vec4( light_probe_props.w * getProbeWeightedSample( tanFrame[2], light_probe_offset.w - 2.65149613, 1.0, tanFrame[2] ), 1.0 );
+//    }
+
+    /*
+    // PKC -- the code below is for full-blown IBL, which we'll skip for now
+
+    // Hand-calculated Hammersley points for t = 2, n = 33
+    // I exclude the 0,0 first point, hence why n=33 and not 32
+    // Nice thing about 2d Hammersley points is that any subset is
+    // also stratified, so even if I have 1000 points and truncate
+    // anywhere, I'm fine.  Each of these represent the y of an xy
+    // while x for the kth point is always (k+1)/n.
+    float kernel[32];
+    kernel[0] = 0.5; kernel[1] = 0.25;
+    kernel[2] = 0.75; kernel[3] = 0.125;
+    kernel[4] = 0.625; kernel[5] = 0.375;
+    kernel[6] = 0.875; kernel[7] = 0.0625;
+    kernel[8] = 0.5625; kernel[9] = 0.3125;
+    kernel[10] = 0.8125; kernel[11] = 0.1875;
+    kernel[12] = 0.6875; kernel[13] = 0.4375;
+    kernel[14] = 0.9375; kernel[15] = 0.03125;
+    kernel[16] = 0.53125; kernel[17] = 0.28125;
+    kernel[18] = 0.78125; kernel[19] = 0.15625;
+    kernel[20] = 0.65625; kernel[21] = 0.40625;
+    kernel[22] = 0.90625; kernel[23] = 0.09375;
+    kernel[24] = 0.59375; kernel[25] = 0.34375;
+    kernel[26] = 0.84375; kernel[27] = 0.28175;
+    kernel[28] = 0.71875; kernel[29] = 0.46875;
+    kernel[30] = 0.96875; kernel[31] = 0.015625;
+
+    float phiShift = noise1d(gl_FragCoord.xy) - 0.5;
+
+    vec3 ret = vec3(0, 0, 0);
+
+    int ct = 24;
+    float step = 25.0;
+
+    // Importance sampling a cosine-weighted distribution.  Since this
+    // matches the BSDF exactly, we are just going to assume that the PDF
+    // and the BSDF cancel out in sampling, so we just need to accumulate
+    // texture colors.  The noise function puts randomized "twist" into
+    // the sampled directions.
+    for( int i = 0; i < ct; ++i )
+    {
+        vec3 localDir;
+        float phi = 6.28318530718 * (kernel[i] + phiShift);
+        float cosTheta = sqrt( float(i+1) / step);
+        localDir.z = sqrt(1.0 - cosTheta*cosTheta);
+        localDir.x = cos(phi) * cosTheta;
+        localDir.y = sin(phi) * cosTheta;
+        vec3 smpDir = tanFrame[0]*localDir.x + tanFrame[1]*localDir.y + tanFrame[2]*localDir.z;
+
+
+        float lodShift = light_probe_offset.w - 2 + log2( 3.1415926535 / (localDir.z * step) );
+        vec3 smpColor = getProbeSample( smpDir, lodShift, tanFrame[2] );
+
+        // The assumption here is that the BSDF and the sampling PDF are identical
+        // so they cancel out and therefore, we don't need to include it here.
+        ret += smpColor;
+    }
+
+    ret *= aoFactor / 24.0;
+    return ret;
+    */
+}
+
+vec4 sampleDiffuseCustomMaterial( vec3 normal, vec3 worldPos, float aoFactor  )
+{
+
+    mat3 tanFrame = tangentFrame( normal, worldPos );
+    return sampleDiffuse( tanFrame );
+}
+
+vec4 sampleGlossyAniso( mat3 tanFrame, vec3 viewDir, float roughU, float roughV )
+{
+    if ( light_probe_props.w < 0.005 )
+        return vec4( 0.0 );
+
+    // PKC : If we do the full IBL sampling, it's useful to square the roughnesses because
+    // it makes the effect of roughness feel more linear in the low end.  This isn't necessary
+    // for fast IBL.
+//    float sigmaU = clamp(roughU*roughU, 0.0001, 1.0);
+//    float sigmaV = clamp(roughV*roughV, 0.0001, 1.0);
+    float sigmaU = smoothstep( 0.0, 1.0, clamp(roughU, 0.0001, 1.0) );
+    float sigmaV = smoothstep( 0.0, 1.0, clamp(roughV, 0.0001, 1.0) );
+    vec3 ret = vec3(0, 0, 0);
+
+//    if ( light_probe_offset.w > 0.5 )
+//    {
+        vec3 smpDir = reflect( -viewDir, tanFrame[2] );
+        float sigma = sqrt(sigmaU * sigmaV);
+
+        // Compute the Geometric occlusion/self-shadowing term
+        float NdotL = clamp( dot( smpDir, tanFrame[2] ), 0.0, 0.999995);
+        float k = sigma * 0.31830988618;    // roughness / pi
+        float Gl = clamp( (NdotL / (NdotL*(1.0-k) + k) + (1.0 - k*k)) * 0.5, 0.0, 1.0 );
+
+        vec3 outColor;
+
+        outColor = getProbeAnisoSample( smpDir, sigmaU, sigmaV, tanFrame );
+
+        return vec4( light_probe_props.w * Gl * outColor, 1.0 );
+//    }
+
+    // PKC -- the code below is for full-blown IBL, which we'll skip for now
+
+/*
+    float step = clamp( ceil(32.0 * sqrt(max(sigmaU, sigmaV))), 4.0, 32.0 );
+    int actualCt = int(step);
+    float phiShift = noise1d(gl_FragCoord.xy) - 0.5;
+
+    // Hand-calculated Hammersley points for t = 2, n = 33
+    // I exclude the 0,0 first point, hence why n=33 and not 32
+    // Nice thing about 2d Hammersley points is that any subset is
+    // also stratified, so even if I have 1000 points and truncate
+    // anywhere, I'm fine.  Each of these represent the y of an xy
+    // while x for the kth point is always (k+1)/n.
+    float kernel[32];
+    kernel[0] = 0.5; kernel[1] = 0.25;
+    kernel[2] = 0.75; kernel[3] = 0.125;
+    kernel[4] = 0.625; kernel[5] = 0.375;
+    kernel[6] = 0.875; kernel[7] = 0.0625;
+    kernel[8] = 0.5625; kernel[9] = 0.3125;
+    kernel[10] = 0.8125; kernel[11] = 0.1875;
+    kernel[12] = 0.6875; kernel[13] = 0.4375;
+    kernel[14] = 0.9375; kernel[15] = 0.03125;
+    kernel[16] = 0.53125; kernel[17] = 0.28125;
+    kernel[18] = 0.78125; kernel[19] = 0.15625;
+    kernel[20] = 0.65625; kernel[21] = 0.40625;
+    kernel[22] = 0.90625; kernel[23] = 0.09375;
+    kernel[24] = 0.59375; kernel[25] = 0.34375;
+    kernel[26] = 0.84375; kernel[27] = 0.28175;
+    kernel[28] = 0.71875; kernel[29] = 0.46875;
+    kernel[30] = 0.96875; kernel[31] = 0.015625;
+
+    float thetaI = acos( dot(viewDir, tanFrame[2]) );
+
+    // NOTE : The model I'm using here is actually based on the KGGX model used in
+    // physGlossyBSDF.  This is my own variation on the original GGX which uses something
+    // closer to a pure Cauchy distribution in tangent space, but also supports anisotropy.
+    for (int i = 0; i < actualCt; ++i)
+    {
+        vec3 localDir;
+
+        float phi = 6.28318530718 * (kernel[i] + phiShift);
+        float u = float(i + 1) / (step + 1.0);
+        float rU = cos(phi) * sigmaU;
+        float rV = sin(phi) * sigmaV;
+        float sigma = sqrt(rU * rU + rV * rV);
+
+        float boundA = atan( ((thetaI - 1.57079632679) * 0.5) / sigma );
+        float boundB = atan( ((thetaI + 1.57079632679) * 0.5) / sigma );
+        float t = (1.0 - u) * boundA + u * boundB;
+        float thetaH = tan( t ) * sigma;
+
+        float cosThetaH = cos( thetaH );
+        float sinThetaH = sin( thetaH );
+        localDir.z = cosThetaH;
+        localDir.y = sin(phi) * sinThetaH;
+        localDir.x = cos(phi) * sinThetaH;
+
+        vec3 halfDir = tanFrame[0]*localDir.x + tanFrame[1]*localDir.y + tanFrame[2]*localDir.z;
+        halfDir = normalize(halfDir);
+        vec3 smpDir = reflect( -viewDir, halfDir );
+
+        vec2 scaledXY = localDir.xy / vec2(sigmaU, sigmaV);
+        float PDF = (sigmaU*sigmaV) / (sigmaU*sigmaV + dot(scaledXY, scaledXY));
+        vec3 Haf = smpDir + viewDir;    // We need the unnormalized half vecter as well as the normalized one
+        float HdotL = dot(halfDir, smpDir);
+        // normalize the PDF to compute the filter support
+        // This gives us the ideal miplevel at which to sample the texture map.
+        PDF *= dot(Haf, Haf) / (4.0 * dot(Haf, smpDir) * HdotL * sigmaU*sigmaV * (boundB-boundA)*(boundB-boundA));
+
+        // Again assuming that the pdf and BSDF are equivalent -- that's not generally valid,
+        // but it saves a lot of ALU cycles.
+        float lodShift = log2( 512.0 * sigma / PDF );
+
+        float k = sigma * 0.31830988618;    // roughness / pi
+        float Gl = clamp( (HdotL / (HdotL*(1.0-k) + k) + (1.0 - k*k)) * 0.5, 0.0, 1.0 );
+
+        vec3 smpColor = Gl * getProbeSample( smpDir, lodShift, tanFrame[2] );
+        ret += smpColor;
+    }
+    ret /= float(actualCt);
+    return vec4(ret, 1.0);
+*/
+}
+
+vec4 sampleGlossy( mat3 tanFrame, vec3 viewDir, float roughness )
+{
+    return sampleGlossyAniso( tanFrame, viewDir, roughness, roughness );
+}
+
+vec4 sampleGlossyCustomMaterial( vec3 normal, vec3 worldPos, vec3 viewDir, float roughness )
+{
+    mat3 tanFrame = tangentFrame( normal, worldPos );
+    return sampleGlossy( tanFrame, viewDir, roughness );
+}
+
+#endif
diff --git a/src/Runtime/res/effectlib/gles2/shadowMapping.glsllib b/src/Runtime/res/effectlib/gles2/shadowMapping.glsllib
new file mode 100644
index 00000000..183ef974
--- /dev/null
+++ b/src/Runtime/res/effectlib/gles2/shadowMapping.glsllib
@@ -0,0 +1,106 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 NVIDIA Corporation.
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt 3D Studio.
+**
+** $QT_BEGIN_LICENSE:GPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 or (at your option) any later version
+** approved by the KDE Free Qt Foundation. The licenses are as published by
+** the Free Software Foundation and appearing in the file LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef SHADOW_MAPPING_GLSLLIB
+#define SHADOW_MAPPING_GLSLLIB
+
+#include "depthpass.glsllib"
+
+float sampleParaboloid( in sampler2D shadowMap, in vec4 shadowControls, in mat4 shadowMatrix, in vec3 worldPos, in vec2 cameraProps, out vec2 smpUV )
+{
+    vec4 projCoord = shadowMatrix * vec4( worldPos, 1.0 );
+    vec3 smpCoord = projCoord.xyz / projCoord.w;
+
+    float ptDepth = depthValueToLinearDistance( 1.0 - smpCoord.z, cameraProps );
+    ptDepth = (ptDepth - cameraProps.x) / (cameraProps.y - cameraProps.x);
+    smpCoord = normalize( smpCoord.xyz );
+    smpCoord.xy /= -( smpCoord.z + 1.0 );
+    smpCoord.xy = vec2(1.0) - smpCoord.xy;
+    smpCoord.xy *= 0.5;
+
+    smpUV = smpCoord.xy; // This is just for debug purposes to ensure what the sampled UV cooord is.
+
+    float sampleDepth = texture( shadowMap, smpCoord.xy ).x + shadowControls.x;
+    sampleDepth *= sampleDepth;
+    ptDepth *= ptDepth;
+    float shadowFac = min(1.0, exp(shadowControls.y * sampleDepth * sampleDepth) / exp(shadowControls.y * ptDepth * ptDepth));
+
+    smpUV.xy *= shadowFac;
+    return shadowFac;
+}
+
+float sampleCubemap( in samplerCube shadowCube, in vec4 shadowControls, in mat4 shadowViewMat, in vec3 lightPos, in vec3 worldPos, in vec2 cameraProps )
+{
+    vec3 viewDir = worldPos - vec3(lightPos.x, lightPos.y, lightPos.z);
+    float ptDepth = length(viewDir.xyz);
+    vec4 viewCoord = shadowViewMat * vec4( viewDir.xyz, 0.0 );
+    viewCoord.xyz /= ptDepth;
+    ptDepth = clamp((ptDepth - 1.0) / (cameraProps.y - 1.0), 0.0, 1.0);
+
+    float smpDepth = textureCube( shadowCube, viewDir.xyz ).x + shadowControls.x;
+
+    float shadowFac =  min(1.0, exp(shadowControls.y * smpDepth) / exp(shadowControls.y * ptDepth));
+    return shadowFac;
+}
+
+float sampleOrthographic( in sampler2D shadowMap, in vec4 shadowControls, in mat4 shadowMatrix, in vec3 worldPos, in vec2 cameraProps )
+{
+    vec4 projCoord = shadowMatrix * vec4( worldPos, 1.0 );
+    vec3 smpCoord = projCoord.xyz / projCoord.w;
+
+    float sampleDepth = texture( shadowMap, smpCoord.xy ).x + shadowControls.x;
+
+    return min(1.0, exp(shadowControls.y * sampleDepth) / exp(shadowControls.y * smpCoord.z));
+}
+
+
+struct ParaboloidMapResult
+{
+    vec4 m_Position;
+    vec4 m_WorldPos;
+};
+
+ParaboloidMapResult VertexParaboloidDepth(vec3 pos, mat4 inMVP)
+{
+    vec4 glPos = inMVP * vec4( pos, 1.0 );
+    glPos /= glPos.w;
+    glPos.xyz = normalize( glPos.xyz );
+    vec4 world_pos;
+    world_pos.w = glPos.z;
+    glPos.xy /= glPos.z + 1.0;
+    world_pos.xyz = pos.xyz;
+
+    ParaboloidMapResult retval;
+    retval.m_Position = glPos;
+    retval.m_WorldPos = world_pos;
+    return retval;
+}
+
+#endif
diff --git a/src/Runtime/res/effectlib/gles2/tangentSpaceNormalTexture.glsllib b/src/Runtime/res/effectlib/gles2/tangentSpaceNormalTexture.glsllib
new file mode 100644
index 00000000..fd0a1415
--- /dev/null
+++ b/src/Runtime/res/effectlib/gles2/tangentSpaceNormalTexture.glsllib
@@ -0,0 +1,97 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 NVIDIA Corporation.
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt 3D Studio.
+**
+** $QT_BEGIN_LICENSE:GPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 or (at your option) any later version
+** approved by the KDE Free Qt Foundation. The licenses are as published by
+** the Free Software Foundation and appearing in the file LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef FILE_NORMAL_TEXTURE_GLSLLIB
+#define FILE_NORMAL_TEXTURE_GLSLLIB
+
+#ifdef UIC_DEFINE_API
+
+#include "luminance.glsllib"
+#include "monoChannel.glsllib"
+#include "textureCoordinateInfo.glsllib"
+#define wrap_clamp 0
+#define wrap_repeat 1
+#define wrap_mirrored_repeat 2
+#include "rotationTranslationScale.glsllib"
+#include "transformCoordinate.glsllib"
+
+#endif
+
+int modulo(int a, int b)
+{
+    int k = (a / b);
+    return a - k*b;
+}
+
+//interpreting the color values of a bitmap as a vector in tangent space
+vec3 tangentSpaceNormalTexture( in sampler2D tex, in float factor, in bool flipTangentU, in bool flipTangentV
+                              , in texture_coordinate_info uvw, in vec2 cropU, in vec2 cropV, in int wrapU, in int wrapV )
+{
+  // if we mirror repeat a tangent space texture, tangent space needs to be flipped for every other tile
+  bool flipU = flipTangentU;
+  bool flipV = flipTangentV;
+  if ( wrapU == wrap_mirrored_repeat )
+  {
+    if (    ( ( 0.0 < uvw.position.x ) && ( modulo(int( uvw.position.x ), 2) == 1 ) )
+        ||  ( ( uvw.position.x < 0.0 ) && ( modulo(int( uvw.position.x ), 2) == 0 ) ) )
+    {
+      flipU = !flipU;
+    }
+    if (    ( ( 0.0 < uvw.position.y ) && ( modulo(int( uvw.position.y ), 2) == 1 ) )
+        ||  ( ( uvw.position.y < 0.0 ) && ( modulo(int( uvw.position.y ), 2) == 0 ) ) )
+    {
+      flipV = !flipV;
+    }
+  }
+
+  vec3 tangent = 2.0 * texture( tex, uvw.position.xy ).xyz - 1.0;
+
+  vec3 tangentU = normalize( flipU ? -uvw.tangent_u : uvw.tangent_u );
+  vec3 tangentV = normalize( flipV ? -uvw.tangent_v : uvw.tangent_v );
+  vec3 normal = normalize( cross( tangentU, tangentV ) );
+
+  return( mix( normal, normalize( tangent.x * tangentU - tangent.y * tangentV + tangent.z * normal ), factor ) );
+}
+
+#include "textureCoordinateInfo.glsllib"
+
+//Simpler version built to run from UIC image data
+//In our case, we have already generated the texture coordinate x,y position
+//TODO - figure out if we need to manipulate tangent_u, tangent_v.
+vec3 uicDefaultMaterialFileNormalTexture( in sampler2D sampler, in float factor, vec2 texCoord, vec3 tangent, vec3 binormal )
+{
+  // factor should be in [0,1] range
+  return tangentSpaceNormalTexture( sampler, clamp(factor, 0.0, 1.0), false, false
+                                  , textureCoordinateInfo( vec3( texCoord.x, texCoord.y, 0.0 ), tangent, binormal )
+                                  , vec2( 0.000000, 1.000000 ), vec2( 0.000000, 1.000000 )
+                                  , wrap_repeat, wrap_repeat);
+}
+
+#endif