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Diffstat (limited to 'src/gui/util/qshadergenerator.cpp')
| -rw-r--r-- | src/gui/util/qshadergenerator.cpp | 638 |
1 files changed, 0 insertions, 638 deletions
diff --git a/src/gui/util/qshadergenerator.cpp b/src/gui/util/qshadergenerator.cpp deleted file mode 100644 index 4933e913a3..0000000000 --- a/src/gui/util/qshadergenerator.cpp +++ /dev/null @@ -1,638 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB). -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the QtGui module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** 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 Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 3 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL3 included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 3 requirements -** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 2.0 or (at your option) the GNU General -** Public license version 3 or 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.GPL2 and 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-2.0.html and -** https://www.gnu.org/licenses/gpl-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qshadergenerator_p.h" - -#include "qshaderlanguage_p.h" -#include <QRegularExpression> - -#include <cctype> - -QT_BEGIN_NAMESPACE - -Q_LOGGING_CATEGORY(ShaderGenerator, "ShaderGenerator", QtWarningMsg) - -namespace -{ - QByteArray toGlsl(QShaderLanguage::StorageQualifier qualifier, const QShaderFormat &format) - { - if (format.version().majorVersion() <= 2) { - // Note we're assuming fragment shader only here, it'd be different - // values for vertex shader, will need to be fixed properly at some - // point but isn't necessary yet (this problem already exists in past - // commits anyway) - switch (qualifier) { - case QShaderLanguage::Const: - return "const"; - case QShaderLanguage::Input: - if (format.shaderType() == QShaderFormat::Vertex) - return "attribute"; - else - return "varying"; - case QShaderLanguage::Output: - return ""; // Although fragment shaders for <=2 only have fixed outputs - case QShaderLanguage::Uniform: - return "uniform"; - case QShaderLanguage::BuiltIn: - return "//"; - } - } else { - switch (qualifier) { - case QShaderLanguage::Const: - return "const"; - case QShaderLanguage::Input: - return "in"; - case QShaderLanguage::Output: - return "out"; - case QShaderLanguage::Uniform: - return "uniform"; - case QShaderLanguage::BuiltIn: - return "//"; - } - } - - Q_UNREACHABLE(); - } - - QByteArray toGlsl(QShaderLanguage::VariableType type) - { - switch (type) { - case QShaderLanguage::Bool: - return "bool"; - case QShaderLanguage::Int: - return "int"; - case QShaderLanguage::Uint: - return "uint"; - case QShaderLanguage::Float: - return "float"; - case QShaderLanguage::Double: - return "double"; - case QShaderLanguage::Vec2: - return "vec2"; - case QShaderLanguage::Vec3: - return "vec3"; - case QShaderLanguage::Vec4: - return "vec4"; - case QShaderLanguage::DVec2: - return "dvec2"; - case QShaderLanguage::DVec3: - return "dvec3"; - case QShaderLanguage::DVec4: - return "dvec4"; - case QShaderLanguage::BVec2: - return "bvec2"; - case QShaderLanguage::BVec3: - return "bvec3"; - case QShaderLanguage::BVec4: - return "bvec4"; - case QShaderLanguage::IVec2: - return "ivec2"; - case QShaderLanguage::IVec3: - return "ivec3"; - case QShaderLanguage::IVec4: - return "ivec4"; - case QShaderLanguage::UVec2: - return "uvec2"; - case QShaderLanguage::UVec3: - return "uvec3"; - case QShaderLanguage::UVec4: - return "uvec4"; - case QShaderLanguage::Mat2: - return "mat2"; - case QShaderLanguage::Mat3: - return "mat3"; - case QShaderLanguage::Mat4: - return "mat4"; - case QShaderLanguage::Mat2x2: - return "mat2x2"; - case QShaderLanguage::Mat2x3: - return "mat2x3"; - case QShaderLanguage::Mat2x4: - return "mat2x4"; - case QShaderLanguage::Mat3x2: - return "mat3x2"; - case QShaderLanguage::Mat3x3: - return "mat3x3"; - case QShaderLanguage::Mat3x4: - return "mat3x4"; - case QShaderLanguage::Mat4x2: - return "mat4x2"; - case QShaderLanguage::Mat4x3: - return "mat4x3"; - case QShaderLanguage::Mat4x4: - return "mat4x4"; - case QShaderLanguage::DMat2: - return "dmat2"; - case QShaderLanguage::DMat3: - return "dmat3"; - case QShaderLanguage::DMat4: - return "dmat4"; - case QShaderLanguage::DMat2x2: - return "dmat2x2"; - case QShaderLanguage::DMat2x3: - return "dmat2x3"; - case QShaderLanguage::DMat2x4: - return "dmat2x4"; - case QShaderLanguage::DMat3x2: - return "dmat3x2"; - case QShaderLanguage::DMat3x3: - return "dmat3x3"; - case QShaderLanguage::DMat3x4: - return "dmat3x4"; - case QShaderLanguage::DMat4x2: - return "dmat4x2"; - case QShaderLanguage::DMat4x3: - return "dmat4x3"; - case QShaderLanguage::DMat4x4: - return "dmat4x4"; - case QShaderLanguage::Sampler1D: - return "sampler1D"; - case QShaderLanguage::Sampler2D: - return "sampler2D"; - case QShaderLanguage::Sampler3D: - return "sampler3D"; - case QShaderLanguage::SamplerCube: - return "samplerCube"; - case QShaderLanguage::Sampler2DRect: - return "sampler2DRect"; - case QShaderLanguage::Sampler2DMs: - return "sampler2DMS"; - case QShaderLanguage::SamplerBuffer: - return "samplerBuffer"; - case QShaderLanguage::Sampler1DArray: - return "sampler1DArray"; - case QShaderLanguage::Sampler2DArray: - return "sampler2DArray"; - case QShaderLanguage::Sampler2DMsArray: - return "sampler2DMSArray"; - case QShaderLanguage::SamplerCubeArray: - return "samplerCubeArray"; - case QShaderLanguage::Sampler1DShadow: - return "sampler1DShadow"; - case QShaderLanguage::Sampler2DShadow: - return "sampler2DShadow"; - case QShaderLanguage::Sampler2DRectShadow: - return "sampler2DRectShadow"; - case QShaderLanguage::Sampler1DArrayShadow: - return "sampler1DArrayShadow"; - case QShaderLanguage::Sampler2DArrayShadow: - return "sample2DArrayShadow"; - case QShaderLanguage::SamplerCubeShadow: - return "samplerCubeShadow"; - case QShaderLanguage::SamplerCubeArrayShadow: - return "samplerCubeArrayShadow"; - case QShaderLanguage::ISampler1D: - return "isampler1D"; - case QShaderLanguage::ISampler2D: - return "isampler2D"; - case QShaderLanguage::ISampler3D: - return "isampler3D"; - case QShaderLanguage::ISamplerCube: - return "isamplerCube"; - case QShaderLanguage::ISampler2DRect: - return "isampler2DRect"; - case QShaderLanguage::ISampler2DMs: - return "isampler2DMS"; - case QShaderLanguage::ISamplerBuffer: - return "isamplerBuffer"; - case QShaderLanguage::ISampler1DArray: - return "isampler1DArray"; - case QShaderLanguage::ISampler2DArray: - return "isampler2DArray"; - case QShaderLanguage::ISampler2DMsArray: - return "isampler2DMSArray"; - case QShaderLanguage::ISamplerCubeArray: - return "isamplerCubeArray"; - case QShaderLanguage::USampler1D: - return "usampler1D"; - case QShaderLanguage::USampler2D: - return "usampler2D"; - case QShaderLanguage::USampler3D: - return "usampler3D"; - case QShaderLanguage::USamplerCube: - return "usamplerCube"; - case QShaderLanguage::USampler2DRect: - return "usampler2DRect"; - case QShaderLanguage::USampler2DMs: - return "usampler2DMS"; - case QShaderLanguage::USamplerBuffer: - return "usamplerBuffer"; - case QShaderLanguage::USampler1DArray: - return "usampler1DArray"; - case QShaderLanguage::USampler2DArray: - return "usampler2DArray"; - case QShaderLanguage::USampler2DMsArray: - return "usampler2DMSArray"; - case QShaderLanguage::USamplerCubeArray: - return "usamplerCubeArray"; - } - - Q_UNREACHABLE(); - } - - QByteArray replaceParameters(const QByteArray &original, const QShaderNode &node, const QShaderFormat &format) - { - QByteArray result = original; - - const QStringList parameterNames = node.parameterNames(); - for (const QString ¶meterName : parameterNames) { - const QByteArray placeholder = QByteArray(QByteArrayLiteral("$") + parameterName.toUtf8()); - const QVariant parameter = node.parameter(parameterName); - if (parameter.userType() == qMetaTypeId<QShaderLanguage::StorageQualifier>()) { - const QShaderLanguage::StorageQualifier qualifier = qvariant_cast<QShaderLanguage::StorageQualifier>(parameter); - const QByteArray value = toGlsl(qualifier, format); - result.replace(placeholder, value); - } else if (parameter.userType() == qMetaTypeId<QShaderLanguage::VariableType>()) { - const QShaderLanguage::VariableType type = qvariant_cast<QShaderLanguage::VariableType>(parameter); - const QByteArray value = toGlsl(type); - result.replace(placeholder, value); - } else { - const QByteArray value = parameter.toString().toUtf8(); - result.replace(placeholder, value); - } - } - - return result; - } -} - -QByteArray QShaderGenerator::createShaderCode(const QStringList &enabledLayers) const -{ - auto code = QByteArrayList(); - - if (format.isValid()) { - const bool isGLES = format.api() == QShaderFormat::OpenGLES; - const int major = format.version().majorVersion(); - const int minor = format.version().minorVersion(); - - const int version = major == 2 && isGLES ? 100 - : major == 3 && isGLES ? 300 - : major == 2 ? 100 + 10 * (minor + 1) - : major == 3 && minor <= 2 ? 100 + 10 * (minor + 3) - : major * 100 + minor * 10; - - const QByteArray profile = isGLES && version > 100 ? QByteArrayLiteral(" es") - : version >= 150 && format.api() == QShaderFormat::OpenGLCoreProfile ? QByteArrayLiteral(" core") - : version >= 150 && format.api() == QShaderFormat::OpenGLCompatibilityProfile ? QByteArrayLiteral(" compatibility") - : QByteArray(); - - code << (QByteArrayLiteral("#version ") + QByteArray::number(version) + profile); - code << QByteArray(); - } - - const auto intersectsEnabledLayers = [enabledLayers] (const QStringList &layers) { - return layers.isEmpty() - || std::any_of(layers.cbegin(), layers.cend(), - [enabledLayers] (const QString &s) { return enabledLayers.contains(s); }); - }; - - QList<QString> globalInputVariables; - const QRegularExpression globalInputExtractRegExp(QStringLiteral("^.*\\s+(\\w+).*;$")); - - const QList<QShaderNode> nodes = graph.nodes(); - for (const QShaderNode &node : nodes) { - if (intersectsEnabledLayers(node.layers())) { - const QByteArrayList headerSnippets = node.rule(format).headerSnippets; - for (const QByteArray &snippet : headerSnippets) { - code << replaceParameters(snippet, node, format); - - // If node is an input, record the variable name into the globalInputVariables list - if (node.type() == QShaderNode::Input) { - const QRegularExpressionMatch match = globalInputExtractRegExp.match(QString::fromUtf8(code.last())); - if (match.hasMatch()) - globalInputVariables.push_back(match.captured(1)); - } - } - } - } - - code << QByteArray(); - code << QByteArrayLiteral("void main()"); - code << QByteArrayLiteral("{"); - - const QRegularExpression temporaryVariableToAssignmentRegExp(QStringLiteral("([^;]*\\s+(v\\d+))\\s*=\\s*([^;]*);")); - const QRegularExpression temporaryVariableInAssignmentRegExp(QStringLiteral("\\W*(v\\d+)\\W*")); - const QRegularExpression statementRegExp(QStringLiteral("\\s*(\\w+)\\s*=\\s*([^;]*);")); - - struct Variable; - - struct Assignment - { - QString expression; - QList<Variable *> referencedVariables; - }; - - struct Variable - { - enum Type { - GlobalInput, - TemporaryAssignment, - Output - }; - - QString name; - QString declaration; - int referenceCount = 0; - Assignment assignment; - Type type = TemporaryAssignment; - bool substituted = false; - - static void substitute(Variable *v) - { - if (v->substituted) - return; - - qCDebug(ShaderGenerator) << "Begin Substituting " << v->name << " = " << v->assignment.expression; - for (Variable *ref : qAsConst(v->assignment.referencedVariables)) { - // Recursively substitute - Variable::substitute(ref); - - // Replace all variables referenced only once in the assignment - // by their actual expression - if (ref->referenceCount == 1 || ref->type == Variable::GlobalInput) { - const QRegularExpression r(QStringLiteral("(.*\\b)(%1)(\\b.*)").arg(ref->name)); - if (v->assignment.referencedVariables.size() == 1) - v->assignment.expression.replace(r, - QStringLiteral("\\1%2\\3").arg(ref->assignment.expression)); - else - v->assignment.expression.replace(r, - QStringLiteral("(\\1%2\\3)").arg(ref->assignment.expression)); - } - } - qCDebug(ShaderGenerator) << "Done Substituting " << v->name << " = " << v->assignment.expression; - v->substituted = true; - } - }; - - struct LineContent - { - QByteArray rawContent; - Variable *var = nullptr; - }; - - // Table to store temporary variables that should be replaced: - // - If variable references a a global variables - // -> we will use the global variable directly - // - If variable references a function results - // -> will be kept only if variable is referenced more than once. - // This avoids having vec3 v56 = vertexPosition; when we could - // just use vertexPosition directly. - // The added benefit is when having arrays, we don't try to create - // mat4 v38 = skinningPalelette[100] which would be invalid - QList<Variable> temporaryVariables; - // Reserve more than enough space to ensure no reallocation will take place - temporaryVariables.reserve(nodes.size() * 8); - - QList<LineContent> lines; - - auto createVariable = [&] () -> Variable * { - Q_ASSERT(temporaryVariables.capacity() > 0); - temporaryVariables.resize(temporaryVariables.size() + 1); - return &temporaryVariables.last(); - }; - - auto findVariable = [&] (const QString &name) -> Variable * { - const auto end = temporaryVariables.end(); - auto it = std::find_if(temporaryVariables.begin(), end, - [=] (const Variable &a) { return a.name == name; }); - if (it != end) - return &(*it); - return nullptr; - }; - - auto gatherTemporaryVariablesFromAssignment = [&] (Variable *v, const QString &assignmentContent) { - QRegularExpressionMatchIterator subMatchIt = temporaryVariableInAssignmentRegExp.globalMatch(assignmentContent); - while (subMatchIt.hasNext()) { - const QRegularExpressionMatch subMatch = subMatchIt.next(); - const QString variableName = subMatch.captured(1); - - // Variable we care about should already exists -> an expression cannot reference a variable that hasn't been defined - Variable *u = findVariable(variableName); - Q_ASSERT(u); - - // Increase reference count for u - ++u->referenceCount; - // Insert u as reference for variable v - v->assignment.referencedVariables.push_back(u); - } - }; - - for (const QShaderGraph::Statement &statement : graph.createStatements(enabledLayers)) { - const QShaderNode node = statement.node; - QByteArray line = node.rule(format).substitution; - const QList<QShaderNodePort> ports = node.ports(); - - struct VariableReplacement { - QByteArray placeholder; - QByteArray variable; - }; - - QList<VariableReplacement> variableReplacements; - - // Generate temporary variable names vN - for (const QShaderNodePort &port : ports) { - const QString portName = port.name; - const QShaderNodePort::Direction portDirection = port.direction; - const bool isInput = port.direction == QShaderNodePort::Input; - - const int portIndex = statement.portIndex(portDirection, portName); - - Q_ASSERT(portIndex >= 0); - - const int variableIndex = isInput ? statement.inputs.at(portIndex) - : statement.outputs.at(portIndex); - if (variableIndex < 0) - continue; - - VariableReplacement replacement; - replacement.placeholder = QByteArrayLiteral("$") + portName.toUtf8(); - replacement.variable = QByteArrayLiteral("v") + QByteArray::number(variableIndex); - - variableReplacements.append(std::move(replacement)); - } - - int begin = 0; - while ((begin = line.indexOf('$', begin)) != -1) { - int end = begin + 1; - char endChar = line.at(end); - const int size = line.size(); - while (end < size && (std::isalnum(endChar) || endChar == '_')) { - ++end; - endChar = line.at(end); - } - - const int placeholderLength = end - begin; - - const QByteArray variableName = line.mid(begin, placeholderLength); - const auto replacementIt = std::find_if(variableReplacements.cbegin(), variableReplacements.cend(), - [&variableName](const VariableReplacement &replacement) { - return variableName == replacement.placeholder; - }); - - if (replacementIt != variableReplacements.cend()) { - line.replace(begin, placeholderLength, replacementIt->variable); - begin += replacementIt->variable.length(); - } else { - begin = end; - } - } - - // Substitute variable names by generated vN variable names - const QByteArray substitutionedLine = replaceParameters(line, node, format); - - QRegularExpressionMatchIterator matches; - - switch (node.type()) { - case QShaderNode::Input: - case QShaderNode::Output: - matches = statementRegExp.globalMatch(QString::fromUtf8(substitutionedLine)); - break; - case QShaderNode::Function: - matches = temporaryVariableToAssignmentRegExp.globalMatch(QString::fromUtf8(substitutionedLine)); - break; - case QShaderNode::Invalid: - break; - } - - while (matches.hasNext()) { - QRegularExpressionMatch match = matches.next(); - - Variable *v = nullptr; - - switch (node.type()) { - // Record name of temporary variable that possibly references a global input - // We will replace the temporary variables by the matching global variables later - case QShaderNode::Input: { - const QString localVariable = match.captured(1); - const QString globalVariable = match.captured(2); - - v = createVariable(); - v->name = localVariable; - v->type = Variable::GlobalInput; - - Assignment assignment; - assignment.expression = globalVariable; - v->assignment = assignment; - break; - } - - case QShaderNode::Function: { - const QString localVariableDeclaration = match.captured(1); - const QString localVariableName = match.captured(2); - const QString assignmentContent = match.captured(3); - - // Add new variable -> it cannot exist already - v = createVariable(); - v->name = localVariableName; - v->declaration = localVariableDeclaration; - v->assignment.expression = assignmentContent; - - // Find variables that may be referenced in the assignment - gatherTemporaryVariablesFromAssignment(v, assignmentContent); - break; - } - - case QShaderNode::Output: { - const QString outputDeclaration = match.captured(1); - const QString assignmentContent = match.captured(2); - - v = createVariable(); - v->name = outputDeclaration; - v->declaration = outputDeclaration; - v->type = Variable::Output; - - Assignment assignment; - assignment.expression = assignmentContent; - v->assignment = assignment; - - // Find variables that may be referenced in the assignment - gatherTemporaryVariablesFromAssignment(v, assignmentContent); - break; - } - case QShaderNode::Invalid: - break; - } - - LineContent lineContent; - lineContent.rawContent = QByteArray(QByteArrayLiteral(" ") + substitutionedLine); - lineContent.var = v; - lines << lineContent; - } - } - - // Go through all lines - // Perform substitution of line with temporary variables substitution - for (LineContent &lineContent : lines) { - Variable *v = lineContent.var; - qCDebug(ShaderGenerator) << lineContent.rawContent; - if (v != nullptr) { - Variable::substitute(v); - - qCDebug(ShaderGenerator) << "Line " << lineContent.rawContent << "is assigned to temporary" << v->name; - - // Check number of occurrences a temporary variable is referenced - if (v->referenceCount == 1 || v->type == Variable::GlobalInput) { - // If it is referenced only once, no point in creating a temporary - // Clear content for current line - lineContent.rawContent.clear(); - // We assume expression that were referencing vN will have vN properly substituted - } else { - lineContent.rawContent = QStringLiteral(" %1 = %2;").arg(v->declaration) - .arg(v->assignment.expression) - .toUtf8(); - } - - qCDebug(ShaderGenerator) << "Updated Line is " << lineContent.rawContent; - } - } - - // Go throug all lines and insert content - for (const LineContent &lineContent : qAsConst(lines)) { - if (!lineContent.rawContent.isEmpty()) { - code << lineContent.rawContent; - } - } - - code << QByteArrayLiteral("}"); - code << QByteArray(); - - return code.join('\n'); -} - -QT_END_NAMESPACE |