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72f6dc612c
OpenGl_ShaderManager - metallic-roughness, emissive, occlusion and normal texture maps are now supported by PBR. Emissive, occlusion and normal texture maps are now supported by Phong shading model. Path-Tracing now handles metallic-roughness and emissive texture maps. Graphic3d_TextureUnit enumeration has been extended by new values corresponding to supported texture maps. OpenGl_TextureSet and OpenGl_ShaderProgram have been extended with bitmask Graphic3d_TextureSetBits identifying texture slots read from GLSL Program and slots defined within Texture Set to avoid undefined behavior by binding mock textures. OpenGl_TextureSet now duplicates texture unit information to handle textures shared across multiple slots (like Occlusion [R] + Metallic-Roughness [GB]). OpenGl_Context::BindTextures() has been extended with active GLSL program paramter to set mock textures to texture units used by program but undefined by texture set. OpenGl_Workspace::ApplyAspects() has been extended with parameter to avoid bining texture set.
89 lines
3.8 KiB
C++
89 lines
3.8 KiB
C++
// Copyright (c) 2017 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#ifndef _Graphic3d_TextureUnit_HeaderFile
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#define _Graphic3d_TextureUnit_HeaderFile
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//! Texture unit.
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enum Graphic3d_TextureUnit
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{
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// value as index number
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Graphic3d_TextureUnit_0,
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Graphic3d_TextureUnit_1,
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Graphic3d_TextureUnit_2,
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Graphic3d_TextureUnit_3,
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Graphic3d_TextureUnit_4,
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Graphic3d_TextureUnit_5,
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Graphic3d_TextureUnit_6,
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Graphic3d_TextureUnit_7,
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Graphic3d_TextureUnit_8,
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Graphic3d_TextureUnit_9,
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Graphic3d_TextureUnit_10,
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Graphic3d_TextureUnit_11,
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Graphic3d_TextureUnit_12,
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Graphic3d_TextureUnit_13,
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Graphic3d_TextureUnit_14,
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Graphic3d_TextureUnit_15,
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// aliases
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//! sampler2D occSamplerBaseColor.
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//! RGB(A) base color of the material and alpha mask/opacity.
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Graphic3d_TextureUnit_BaseColor = Graphic3d_TextureUnit_0,
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//! sampler2D occSamplerEmissive.
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//! RGB emissive map controls the color and intensity of the light being emitted by the material.
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Graphic3d_TextureUnit_Emissive = Graphic3d_TextureUnit_1,
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//! sampler2D occSamplerOcclusion.
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//! Occlusion map indicating areas of indirect lighting.
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//! Encoded into RED channel, with 1.0 meaning no occlusion (full color intensity) and 0.0 complete occlusion (black).
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Graphic3d_TextureUnit_Occlusion = Graphic3d_TextureUnit_2,
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//! sampler2D occSamplerNormal.
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//! XYZ tangent space normal map.
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Graphic3d_TextureUnit_Normal = Graphic3d_TextureUnit_3,
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//! sampler2D occSamplerMetallicRoughness.
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//! Metalness + roughness of the material.
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//! Encoded into GREEN (roughness) + BLUE (metallic) channels,
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//! so that it can be optionally combined with occlusion texture (RED channel).
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Graphic3d_TextureUnit_MetallicRoughness = Graphic3d_TextureUnit_4,
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//! samplerCube occSampler0.
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//! Environment cubemap for background. Rendered by dedicated program and normally occupies first texture unit.
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Graphic3d_TextureUnit_EnvMap = Graphic3d_TextureUnit_0,
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//! sampler2D occSamplerPointSprite.
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//! Sprite alpha-mask or RGBA image mapped using point UV, additional to BaseColor (mapping using vertex UV).
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//! This texture unit is set Graphic3d_TextureUnit_1, so that it can be combined with Graphic3d_TextureUnit_BaseColor,
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//! while other texture maps (normal map and others) are unexpected and unsupported for points.
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//! Note that it can be overridden to Graphic3d_TextureUnit_0 for FFP fallback on hardware without multi-texturing.
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Graphic3d_TextureUnit_PointSprite = Graphic3d_TextureUnit_1,
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//! sampler2D occEnvLUT.
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//! Lookup table for approximated PBR environment lighting.
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//! Configured as index at the end of available texture units - 3.
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Graphic3d_TextureUnit_PbrEnvironmentLUT = -3,
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//! sampler2D occDiffIBLMapSHCoeffs.
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//! Diffuse (irradiance) IBL map's spherical harmonics coefficients baked for PBR from environment cubemap image.
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//! Configured as index at the end of available texture units - 2.
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Graphic3d_TextureUnit_PbrIblDiffuseSH = -2,
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//! samplerCube occSpecIBLMap.
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//! Specular IBL (Image-Based Lighting) environment map baked for PBR from environment cubemap image.
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//! Configured as index at the end of available texture units - 1.
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Graphic3d_TextureUnit_PbrIblSpecular = -1,
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};
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enum
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{
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Graphic3d_TextureUnit_NB = Graphic3d_TextureUnit_15 + 1,
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};
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#endif // _Graphic3d_TextureUnit_HeaderFile
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