source/graphics/MaterialManager.cpp

   1 /* Copyright (C) 2022 Wildfire Games.
   2  * This file is part of 0 A.D.
   3  *
   4  * 0 A.D. is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * 0 A.D. is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "precompiled.h"
  19
  20 #include "MaterialManager.h"
  21
  22 #include "graphics/PreprocessorWrapper.h"
  23 #include "maths/MathUtil.h"
  24 #include "maths/Vector4D.h"
  25 #include "ps/CLogger.h"
  26 #include "ps/ConfigDB.h"
  27 #include "ps/CStrInternStatic.h"
  28 #include "ps/Filesystem.h"
  29 #include "ps/XML/Xeromyces.h"
  30 #include "renderer/RenderingOptions.h"
  31
  32 #include <sstream>
  33
  34 CMaterialManager::CMaterialManager()
  35 {
  36         qualityLevel = 5.0;
  37         CFG_GET_VAL("materialmgr.quality", qualityLevel);
  38         qualityLevel = Clamp(qualityLevel, 0.0f, 10.0f);
  39
  40         if (VfsDirectoryExists(L"art/materials/") && !CXeromyces::AddValidator(g_VFS, "material", "art/materials/material.rng"))
  41                 LOGERROR("CMaterialManager: failed to load grammar file 'art/materials/material.rng'");
  42 }
  43
  44 CMaterial CMaterialManager::LoadMaterial(const VfsPath& pathname)
  45 {
  46         if (pathname.empty())
  47                 return CMaterial();
  48
  49         std::map<VfsPath, CMaterial>::iterator iter = m_Materials.find(pathname);
  50         if (iter != m_Materials.end())
  51                 return iter->second;
  52
  53         CXeromyces xeroFile;
  54         if (xeroFile.Load(g_VFS, pathname, "material") != PSRETURN_OK)
  55                 return CMaterial();
  56
  57         #define EL(x) int el_##x = xeroFile.GetElementID(#x)
  58         #define AT(x) int at_##x = xeroFile.GetAttributeID(#x)
  59         EL(alpha_blending);
  60         EL(alternative);
  61         EL(define);
  62         EL(shader);
  63         EL(uniform);
  64         EL(renderquery);
  65         EL(required_texture);
  66         AT(effect);
  67         AT(if);
  68         AT(define);
  69         AT(quality);
  70         AT(material);
  71         AT(name);
  72         AT(value);
  73         #undef AT
  74         #undef EL
  75
  76         CPreprocessorWrapper preprocessor;
  77         CMaterial material;
  78         material.AddStaticUniform("qualityLevel", CVector4D(qualityLevel, 0, 0, 0));
  79
  80         XMBElement root = xeroFile.GetRoot();
  81         XERO_ITER_EL(root, node)
  82         {
  83                 int token = node.GetNodeName();
  84                 XMBAttributeList attrs = node.GetAttributes();
  85                 if (token == el_alternative)
  86                 {
  87                         CStr cond = attrs.GetNamedItem(at_if);
  88                         if (cond.empty() || !preprocessor.TestConditional(cond))
  89                         {
  90                                 cond = attrs.GetNamedItem(at_quality);
  91                                 if (cond.empty())
  92                                         continue;
  93                                 else
  94                                 {
  95                                         if (cond.ToFloat() <= qualityLevel)
  96                                                 continue;
  97                                 }
  98                         }
  99
 100                         material = LoadMaterial(VfsPath("art/materials") / attrs.GetNamedItem(at_material).FromUTF8());
 101                         break;
 102                 }
 103                 else if (token == el_alpha_blending)
 104                 {
 105                         material.SetUsesAlphaBlending(true);
 106                 }
 107                 else if (token == el_shader)
 108                 {
 109                         material.SetShaderEffect(attrs.GetNamedItem(at_effect));
 110                 }
 111                 else if (token == el_define)
 112                 {
 113                         material.AddShaderDefine(CStrIntern(attrs.GetNamedItem(at_name)), CStrIntern(attrs.GetNamedItem(at_value)));
 114                 }
 115                 else if (token == el_uniform)
 116                 {
 117                         std::stringstream str(attrs.GetNamedItem(at_value));
 118                         CVector4D vec;
 119                         str >> vec.X >> vec.Y >> vec.Z >> vec.W;
 120                         material.AddStaticUniform(attrs.GetNamedItem(at_name).c_str(), vec);
 121                 }
 122                 else if (token == el_renderquery)
 123                 {
 124                         material.AddRenderQuery(attrs.GetNamedItem(at_name).c_str());
 125                 }
 126                 else if (token == el_required_texture)
 127                 {
 128                         material.AddRequiredSampler(attrs.GetNamedItem(at_name));
 129                         if (!attrs.GetNamedItem(at_define).empty())
 130                                 material.AddShaderDefine(CStrIntern(attrs.GetNamedItem(at_define)), str_1);
 131                 }
 132         }
 133
 134         m_Materials[pathname] = material;
 135         return material;
 136 }