2 * Copyright (c) 2022 Samsung Electronics Co., Ltd.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
19 #include "dali-scene3d/public-api/loader/shader-definition.h"
20 #include <dali-scene3d/internal/graphics/builtin-shader-extern-gen.h>
21 #include "dali-scene3d/public-api/loader/utils.h"
31 const std::string SHADER_HINT_OUTPUT_IS_TRANSPARENT("OUTPUT_IS_TRANSPARENT"); ///< Might generate transparent alpha from opaque inputs.
32 const std::string SHADER_HINT_MODIFIES_GEOMETRY("MODIFIES_GEOMETRY"); ///< Might change position of vertices, this option disables any culling optimizations.
36 ShaderDefinition::ShaderDefinition(const ShaderDefinition& other)
37 : mRendererState(other.mRendererState),
38 mVertexShaderPath(other.mVertexShaderPath),
39 mFragmentShaderPath(other.mFragmentShaderPath),
40 mDefines(other.mDefines),
42 mUniforms(other.mUniforms),
43 mUseBuiltInShader(other.mUseBuiltInShader)
47 void ShaderDefinition::ApplyDefine(std::string& shaderCode, const std::string& definevar)
49 const std::string IF_1 = "#if 1";
51 std::size_t found = shaderCode.find(definevar);
52 while(found != std::string::npos)
54 // Greater then "@" character means is a letter,
55 // therefore is not has the definevar we looking for.
56 if((found + definevar.length()) < shaderCode.length() && shaderCode.at(found + definevar.length()) > '@')
58 found = shaderCode.find(definevar, found + definevar.length());
61 if(found > 0u && shaderCode.at(found - 1) > '@')
63 found = shaderCode.find(definevar, found + definevar.length());
67 std::size_t defidx = shaderCode.rfind("#ifdef", found);
68 std::size_t newlineidx = shaderCode.rfind("\n", found);
69 if(newlineidx < defidx && defidx != std::string::npos)
71 shaderCode.replace(defidx, found - defidx + definevar.length(), IF_1);
72 found = defidx + IF_1.length();
76 found += definevar.length();
78 found = shaderCode.find(definevar, found);
82 ShaderDefinition::RawData
83 ShaderDefinition::LoadRaw(const std::string& shadersPath) const
88 if(!mUseBuiltInShader)
90 raw.mVertexShaderSource = LoadTextFile((shadersPath + mVertexShaderPath).c_str(), &fail);
93 raw.mFragmentShaderSource = LoadTextFile((shadersPath + mFragmentShaderPath).c_str(), &fail);
96 ExceptionFlinger(ASSERT_LOCATION) << "Failed to load shader source from '" << shadersPath + mFragmentShaderPath << "'.";
101 ExceptionFlinger(ASSERT_LOCATION) << "Failed to load shader source from '" << shadersPath + mVertexShaderPath << "'.";
106 raw.mVertexShaderSource = SHADER_DEFAULT_PHYSICALLY_BASED_SHADER_VERT.data();
107 raw.mFragmentShaderSource = SHADER_DEFAULT_PHYSICALLY_BASED_SHADER_FRAG.data();
112 for(auto definevar : mDefines)
114 ApplyDefine(raw.mVertexShaderSource, definevar);
115 ApplyDefine(raw.mFragmentShaderSource, definevar);
122 Shader ShaderDefinition::Load(RawData&& raw) const
124 uint32_t hints = Shader::Hint::NONE;
125 for(const auto& hint : mHints)
127 if(hint == SHADER_HINT_OUTPUT_IS_TRANSPARENT)
129 hints |= Shader::Hint::OUTPUT_IS_TRANSPARENT;
131 else if(hint == SHADER_HINT_MODIFIES_GEOMETRY)
133 hints |= Shader::Hint::MODIFIES_GEOMETRY;
137 Shader shader = Shader::New(raw.mVertexShaderSource, raw.mFragmentShaderSource, static_cast<Shader::Hint::Value>(hints));
138 for(Property::Map::SizeType i0 = 0, i1 = mUniforms.Count(); i0 != i1; ++i0)
140 auto pair = mUniforms.GetKeyValue(i0);
141 DALI_ASSERT_ALWAYS(pair.first.type == Property::Key::STRING);
142 shader.RegisterProperty(pair.first.stringKey, pair.second);
148 } // namespace Loader
149 } // namespace Scene3D