multiview linker-method

.gitlab-ci.yml

@@ -378,7 +378,7 @@ variables: &tests-targets
     - $env:CCACHE_BASEDIR = Get-Location
     - $env:CCACHE_DIR = "$(Get-Location)\ccache"
     - New-Item -Type Directory -Force -Path $env:CCACHE_DIR
-    - sh CI/before_script.msvc.sh -c $config -p Win64 -v 2019 -k -V -N -b -t -C
+    - sh CI/before_script.msvc.sh -c $config -p Win64 -v 2019 -k -V -N -b -t -C $multiview
     - cd MSVC2019_64_Ninja
     - .\ActivateMSVC.ps1
     - cmake --build . --config $config --target ($targets.Split(','))

apps/openmw/mwrender/renderingmanager.cpp

@@ -412,7 +412,6 @@ namespace MWRender
         globalDefines["preLightEnv"] = Settings::Manager::getBool("apply lighting to environment maps", "Shaders") ? "1" : "0";
         globalDefines["radialFog"] = Settings::Manager::getBool("radial fog", "Shaders") ? "1" : "0";
         globalDefines["useGPUShader4"] = "0";
-        globalDefines["GLSLVersion"] = "120";
         globalDefines["useOVR_multiview"] = "0";
         globalDefines["numViews"] = "1";
 

components/sceneutil/mwshadowtechnique.cpp

@@ -921,7 +921,7 @@ void SceneUtil::MWShadowTechnique::setupCastingShader(Shader::ShaderManager & sh
 {
     // This can't be part of the constructor as OSG mandates that there be a trivial constructor available
 
-    osg::ref_ptr<osg::Shader> castingVertexShader = shaderManager.getShader("shadowcasting_vertex.glsl", { {"GLSLVersion", "120"} }, osg::Shader::VERTEX);
+    osg::ref_ptr<osg::Shader> castingVertexShader = shaderManager.getShader("shadowcasting_vertex.glsl", { }, osg::Shader::VERTEX);
     osg::ref_ptr<osg::GLExtensions> exts = osg::GLExtensions::Get(0, false);
     std::string useGPUShader4 = exts && exts->isGpuShader4Supported ? "1" : "0";
     for (int alphaFunc = GL_NEVER; alphaFunc <= GL_ALWAYS; ++alphaFunc)
@@ -932,8 +932,7 @@ void SceneUtil::MWShadowTechnique::setupCastingShader(Shader::ShaderManager & sh
         program->addShader(shaderManager.getShader("shadowcasting_fragment.glsl", { {"alphaFunc", std::to_string(alphaFunc)},
                                                                                     {"alphaToCoverage", "0"},
                                                                                     {"adjustCoverage", "1"},
-                                                                                    {"useGPUShader4", useGPUShader4},
-                                                                                    {"GLSLVersion", "120"}
+                                                                                    {"useGPUShader4", useGPUShader4}
                                                                                   }, osg::Shader::FRAGMENT));
     }
 }

components/stereo/stereomanager.cpp

@@ -182,7 +182,6 @@ namespace Stereo
     {
         if (getMultiview())
         {
-            defines["GLSLVersion"] = "330 compatibility";
             defines["useOVR_multiview"] = "1";
             defines["numViews"] = "2";
         }

files/shaders/CMakeLists.txt

@@ -18,8 +18,10 @@ set(SHADER_FILES
     objects_fragment.glsl
     openmw_fragment.glsl
     openmw_fragment.h.glsl
+    openmw_fragment_multiview.glsl
     openmw_vertex.glsl
     openmw_vertex.h.glsl
+    openmw_vertex_multiview.glsl
     terrain_vertex.glsl
     terrain_fragment.glsl
     lighting.glsl
@@ -40,8 +42,6 @@ set(SHADER_FILES
     gui_fragment.glsl
     debug_vertex.glsl
     debug_fragment.glsl
-    multiview_fragment.glsl
-    multiview_vertex.glsl
     sky_vertex.glsl
     sky_fragment.glsl
     skypasses.glsl

files/shaders/debug_fragment.glsl

@@ -1,4 +1,4 @@
-#version @GLSLVersion
+#version 120
 
 #include "vertexcolors.glsl"
 

files/shaders/debug_vertex.glsl

@@ -1,4 +1,4 @@
-#version @GLSLVersion
+#version 120
 
 #include "openmw_vertex.h.glsl"
 

files/shaders/groundcover_fragment.glsl

@@ -1,4 +1,4 @@
-#version @GLSLVersion
+#version 120
 
 #if @useUBO
     #extension GL_ARB_uniform_buffer_object : require

files/shaders/groundcover_vertex.glsl

@@ -1,6 +1,6 @@
-#version @GLSLVersion
+#version 120
 
-#include "multiview_vertex.glsl"
+#include "openmw_vertex.h.glsl"
 
 #if @useUBO
     #extension GL_ARB_uniform_buffer_object : require

files/shaders/gui_fragment.glsl

@@ -1,4 +1,4 @@
-#version @GLSLVersion
+#version 120
 
 uniform sampler2D diffuseMap;
 

files/shaders/gui_vertex.glsl

@@ -1,4 +1,4 @@
-#version @GLSLVersion
+#version 120
 
 varying vec2 diffuseMapUV;
 varying vec4 passColor;

files/shaders/multiview_fragment.glsl

@@ -1,48 +0,0 @@
-#ifndef MULTIVIEW_FRAGMENT
-#define MULTIVIEW_FRAGMENT
-
-// This file either enables or disables GL_OVR_multiview2 related code.
-// For use in fragment shaders
-
-// REQUIREMENT:
-// GLSL version: 330 or greater
-// GLSL profile: compatibility
-// NOTE: If stereo is enabled using Misc::StereoView::shaderStereoDefines, version 330 compatibility (or greater) will be set.
-//
-// This file provides symbols for sampling stereo-aware textures. Without multiview, these texture uniforms are sampler2D,
-// while in stereo the same uniforms are sampler2DArray instead. The symbols defined in this file mask this difference, allowing
-// the same code to work in both cases. Use mw_stereoAwareSampler2D and mw_stereoAwareTexture2D, where you otherwise would use 
-// sampler2D and texture2D()
-//
-// USAGE:
-// For stereo-aware textures, such as reflections, use the mw_stereoAwareSampler2D sampler and mw_stereoAwareTexture2D method 
-// instead of the usual sampler2D and texture2D.
-//
-// Using water reflection as an example, the old code for these textures changes from
-//    uniform sampler2D reflectionMap;
-//    ...
-//    vec3 reflection = texture2D(reflectionMap, screenCoords + screenCoordsOffset).rgb;
-//    
-// to
-//    uniform mw_stereoAwareSampler2D reflectionMap;
-//    ...
-//    vec3 reflection = mw_stereoAwareTexture2D(reflectionMap, screenCoords + screenCoordsOffset).rgb;
-//
-
-#if @useOVR_multiview
-
-#extension GL_OVR_multiview : require
-#extension GL_OVR_multiview2 : require
-#extension GL_EXT_texture_array : require
-
-#define mw_stereoAwareSampler2D sampler2DArray
-#define mw_stereoAwareTexture2D(texture, uv) texture2DArray(texture, vec3((uv), gl_ViewID_OVR))
-
-#else // useOVR_multiview
-
-#define mw_stereoAwareSampler2D sampler2D
-#define mw_stereoAwareTexture2D(texture, uv) texture2D(texture, uv)
-
-#endif // useOVR_multiview
-
-#endif // MULTIVIEW_FRAGMENT

files/shaders/multiview_vertex.glsl

@@ -1,80 +0,0 @@
-#ifndef MULTIVIEW_VERTEX
-#define MULTIVIEW_VERTEX
-
-// This file either enables or disables GL_OVR_multiview related code.
-// For use in vertex shaders
-
-// REQUIREMENT:
-// GLSL version: 330 or greater
-// GLSL profile: compatibility
-// NOTE: If stereo is enabled using Misc::StereoView::shaderStereoDefines, version 330 compatibility (or greater) will be set.
-
-// USAGE:
-// To create a stereo-aware vertex shader, use the matrix accessor functions defined in this .glsl file to compute gl_Position.
-// For the vertex stage, usually only gl_Position needs to be computed with stereo awareness, while other variables such as viewPos 
-// should be computed in the center camera's view space and take no stereo awareness.
-//
-// A typical gl_Position line will look like the following:
-//    gl_Position = mw_stereoAwareProjectionMatrix() * (mw_stereoAwareModelViewMatrix() * gl_Vertex);
-//
-// If you need to perform intermediate computations before determining the final values of gl_Position and viewPos,
-// your code might look more like the following:
-//    vec4 intermediateViewPos = gl_ModelViewMatrix * gl_Vertex;
-//    vec4 viewPos = myWhateverCode(intermediateViewPos);
-//    gl_Position = mw_stereoAwareProjectionMatrix() * mw_stereoAwareViewPosition(viewPos);
-//
-
-#if @useOVR_multiview
-
-#extension GL_OVR_multiview : require
-
-#ifndef MULTIVIEW_FRAGMENT
-// Layout cannot be used in the fragment shader
-layout(num_views = @numViews) in;
-#endif
-
-uniform mat4 projectionMatrixMultiView[@numViews];
-uniform mat4 viewMatrixMultiView[@numViews];
-
-// NOTE:
-// stereo-aware inverse view matrices and normal matrices have not been implemented.
-// Some effects like specular highlights would need stereo aware normal matrices to be 100% correct.
-// But the difference is not likely to be noticeable unless you're actively looking for it.
-
-mat4 mw_stereoAwareProjectionMatrix()
-{
-    return projectionMatrixMultiView[gl_ViewID_OVR];
-}
-
-mat4 mw_stereoAwareModelViewMatrix()
-{
-    return viewMatrixMultiView[gl_ViewID_OVR] * gl_ModelViewMatrix;
-}
-
-vec4 mw_stereoAwareViewPosition(vec4 viewPos)
-{
-	return viewMatrixMultiView[gl_ViewID_OVR] * viewPos;
-}
-
-#else // useOVR_multiview
-
-uniform mat4 projectionMatrix;
-
-mat4 mw_stereoAwareProjectionMatrix()
-{
-    return projectionMatrix;
-}
-
-mat4 mw_stereoAwareModelViewMatrix()
-{
-    return gl_ModelViewMatrix;
-}
-
-vec4 mw_stereoAwareViewPosition(vec4 viewPos)
-{
-	return viewPos;
-}
-
-#endif // useOVR_multiview
-
-#endif // MULTIVIEW_VERTEX

files/shaders/nv_default_fragment.glsl

@@ -1,4 +1,4 @@
-#version @GLSLVersion
+#version 120
 #pragma import_defines(FORCE_OPAQUE)
 
 #if @useUBO

files/shaders/nv_default_vertex.glsl

@@ -1,6 +1,6 @@
-#version @GLSLVersion
+#version 120
 
-#include "multiview_vertex.glsl"
+#include "openmw_vertex.h.glsl"
 
 #if @useUBO
     #extension GL_ARB_uniform_buffer_object : require

files/shaders/nv_nolighting_fragment.glsl

@@ -1,4 +1,4 @@
-#version @GLSLVersion
+#version 120
 #pragma import_defines(FORCE_OPAQUE)
 
 #if @useGPUShader4

files/shaders/nv_nolighting_vertex.glsl

@@ -1,4 +1,4 @@
-#version @GLSLVersion
+#version 120
 
 #include "openmw_vertex.h.glsl"
 

files/shaders/objects_fragment.glsl

@@ -1,4 +1,4 @@
-#version @GLSLVersion
+#version 120
 #pragma import_defines(FORCE_OPAQUE)
 
 #if @useUBO

files/shaders/objects_vertex.glsl

@@ -1,6 +1,6 @@
-#version @GLSLVersion
+#version 120
 
-#include "multiview_vertex.glsl"
+#include "openmw_vertex.h.glsl"
 
 #if @useUBO
     #extension GL_ARB_uniform_buffer_object : require

files/shaders/openmw_fragment.h.glsl

@@ -1,4 +1,5 @@
-@link "openmw_fragment.glsl"
+@link "openmw_fragment.glsl" if !@useOVR_multiview
+@link "openmw_fragment_multiview.glsl" if @useOVR_multiview
 
 vec4 mw_sampleReflectionMap(vec2 uv);
 

files/shaders/openmw_fragment_multiview.glsl

@@ -0,0 +1,31 @@
+#version 330 compatibility
+
+#extension GL_OVR_multiview : require
+#extension GL_OVR_multiview2 : require
+#extension GL_EXT_texture_array : require
+
+#include "openmw_fragment.h.glsl"
+
+uniform sampler2DArray reflectionMap;
+
+vec4 mw_sampleReflectionMap(vec2 uv)
+{
+    return texture2DArray(reflectionMap, vec3((uv), gl_ViewID_OVR));
+}
+
+#if @refraction_enabled
+
+uniform sampler2DArray refractionMap;
+uniform sampler2DArray refractionDepthMap;
+
+vec4 mw_sampleRefractionMap(vec2 uv)
+{
+    return texture2DArray(refractionMap, vec3((uv), gl_ViewID_OVR));
+}
+
+float mw_sampleRefractionDepthMap(vec2 uv)
+{
+    return texture2DArray(refractionDepthMap, vec3((uv), gl_ViewID_OVR)).x;
+}
+
+#endif

files/shaders/openmw_vertex.h.glsl

@@ -1,4 +1,5 @@
-@link "openmw_vertex.glsl"
+@link "openmw_vertex.glsl" if !@useOVR_multiview
+@link "openmw_vertex_multiview.glsl" if @useOVR_multiview
 
 vec4 mw_modelToClip(vec4 pos);
 vec4 mw_modelToView(vec4 pos);

files/shaders/openmw_vertex_multiview.glsl

@@ -0,0 +1,41 @@
+#version 330 compatibility
+
+#extension GL_OVR_multiview : require
+#extension GL_OVR_multiview2 : require
+
+layout(num_views = @numViews) in;
+
+#include "openmw_vertex.h.glsl"
+
+uniform mat4 projectionMatrixMultiView[@numViews];
+uniform mat4 viewMatrixMultiView[@numViews];
+
+vec4 mw_modelToClip(vec4 pos)
+{
+    return projectionMatrixMultiView[gl_ViewID_OVR] * mw_modelToView(pos);
+}
+
+vec4 mw_modelToView(vec4 pos)
+{
+    return viewMatrixMultiView[gl_ViewID_OVR] * gl_ModelViewMatrix * pos;
+}
+
+vec4 mw_viewToClip(vec4 pos)
+{
+    return projectionMatrixMultiView[gl_ViewID_OVR] * pos;
+}
+
+vec4 mw_viewStereoAdjust(vec4 pos)
+{
+    return viewMatrixMultiView[gl_ViewID_OVR] * pos;
+}
+
+mat4 mw_viewMatrix()
+{
+    return viewMatrixMultiView[gl_ViewID_OVR] * gl_ModelViewMatrix;
+}
+
+mat4 mw_projectionMatrix()
+{
+    return projectionMatrixMultiView[gl_ViewID_OVR];
+}

files/shaders/s360_fragment.glsl

@@ -1,4 +1,4 @@
-#version @GLSLVersion
+#version 120
 
 varying vec2 uv;
 uniform samplerCube cubeMap;

files/shaders/s360_vertex.glsl

@@ -1,4 +1,4 @@
-#version @GLSLVersion
+#version 120
 
 varying vec2 uv;
 

files/shaders/shadowcasting_fragment.glsl

@@ -1,4 +1,4 @@
-#version @GLSLVersion
+#version 120
 
 #if @useGPUShader4
     #extension GL_EXT_gpu_shader4: require

files/shaders/shadowcasting_vertex.glsl

@@ -1,4 +1,4 @@
-#version @GLSLVersion
+#version 120
 
 varying vec2 diffuseMapUV;
 

files/shaders/sky_fragment.glsl

@@ -1,4 +1,4 @@
-#version @GLSLVersion
+#version 120
 
 #include "skypasses.glsl"
 

files/shaders/sky_vertex.glsl

@@ -1,6 +1,6 @@
-#version @GLSLVersion
+#version 120
 
-#include "multiview_vertex.glsl"
+#include "openmw_vertex.h.glsl"
 
 #include "openmw_vertex.h.glsl"
 
@@ -14,12 +14,12 @@ varying vec2 diffuseMapUV;
 mat4 selectModelViewMatrix()
 {
 #if @useOVR_multiview
-    mat4 viewOffsetMatrix = viewMatrixMultiView[gl_ViewID_OVR];
+    mat4 viewOffsetMatrix = mw_viewMatrix();
     // Sky geometries aren't actually all that distant. So delete view translation to keep them looking distant.
     viewOffsetMatrix[3][0] = 0;
     viewOffsetMatrix[3][1] = 0;
     viewOffsetMatrix[3][2] = 0;
-    return viewOffsetMatrix * gl_ModelViewMatrix;
+    return viewOffsetMatrix;
 #else
     return gl_ModelViewMatrix;
 #endif
@@ -27,7 +27,7 @@ mat4 selectModelViewMatrix()
 
 void main()
 {
-    gl_Position = mw_modelToClip(gl_Vertex);
+    gl_Position = mw_viewToClip(selectModelViewMatrix() * gl_Vertex);
     passColor = gl_Color;
 
     if (pass == PASS_CLOUDS)

files/shaders/terrain_fragment.glsl

@@ -1,4 +1,4 @@
-#version @GLSLVersion
+#version 120
 
 #if @useUBO
     #extension GL_ARB_uniform_buffer_object : require

files/shaders/terrain_vertex.glsl

@@ -1,6 +1,6 @@
-#version @GLSLVersion
+#version 120
 
-#include "multiview_vertex.glsl"
+#include "openmw_vertex.h.glsl"
 
 #if @useUBO
     #extension GL_ARB_uniform_buffer_object : require

files/shaders/water_fragment.glsl

@@ -1,6 +1,6 @@
-#version @GLSLVersion
+#version 120
 
-#include "multiview_fragment.glsl"
+#include "openmw_fragment.h.glsl"
 
 #if @useUBO
     #extension GL_ARB_uniform_buffer_object : require

files/shaders/water_vertex.glsl

@@ -1,4 +1,4 @@
-#version @GLSLVersion
+#version 120
 
 #include "openmw_vertex.h.glsl"