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Diffstat (limited to 'src/gui/util/qshadergenerator.cpp')
| -rw-r--r-- | src/gui/util/qshadergenerator.cpp | 351 |
1 files changed, 351 insertions, 0 deletions
diff --git a/src/gui/util/qshadergenerator.cpp b/src/gui/util/qshadergenerator.cpp new file mode 100644 index 0000000000..31c2f74746 --- /dev/null +++ b/src/gui/util/qshadergenerator.cpp @@ -0,0 +1,351 @@ +/**************************************************************************** +** +** 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" + +QT_BEGIN_NAMESPACE + +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: + return "varying"; + case QShaderLanguage::Output: + return ""; // Although fragment shaders for <=2 only have fixed outputs + case QShaderLanguage::Uniform: + return "uniform"; + } + } else { + switch (qualifier) { + case QShaderLanguage::Const: + return "const"; + case QShaderLanguage::Input: + return "in"; + case QShaderLanguage::Output: + return "out"; + case QShaderLanguage::Uniform: + return "uniform"; + } + } + + 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) + { + auto result = original; + + for (const auto ¶meterName : node.parameterNames()) { + const auto placeholder = QByteArray(QByteArrayLiteral("$") + parameterName.toUtf8()); + const auto parameter = node.parameter(parameterName); + if (parameter.userType() == qMetaTypeId<QShaderLanguage::StorageQualifier>()) { + const auto qualifier = parameter.value<QShaderLanguage::StorageQualifier>(); + const auto value = toGlsl(qualifier, format); + result.replace(placeholder, value); + } else if (parameter.userType() == qMetaTypeId<QShaderLanguage::VariableType>()) { + const auto type = parameter.value<QShaderLanguage::VariableType>(); + const auto value = toGlsl(type); + result.replace(placeholder, value); + } else { + const auto value = parameter.toString().toUtf8(); + result.replace(placeholder, value); + } + } + + return result; + } +} + +QByteArray QShaderGenerator::createShaderCode(const QStringList &enabledLayers) const +{ + auto code = QByteArrayList(); + + if (format.isValid()) { + const auto isGLES = format.api() == QShaderFormat::OpenGLES; + const auto major = format.version().majorVersion(); + const auto minor = format.version().minorVersion(); + + const auto 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 auto 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); }); + }; + + for (const auto &node : graph.nodes()) { + if (intersectsEnabledLayers(node.layers())) { + for (const auto &snippet : node.rule(format).headerSnippets) { + code << replaceParameters(snippet, node, format); + } + } + } + + code << QByteArray(); + code << QByteArrayLiteral("void main()"); + code << QByteArrayLiteral("{"); + + for (const auto &statement : graph.createStatements(enabledLayers)) { + const auto node = statement.node; + auto line = node.rule(format).substitution; + for (const auto &port : node.ports()) { + const auto portName = port.name; + const auto portDirection = port.direction; + const auto isInput = port.direction == QShaderNodePort::Input; + + const auto portIndex = statement.portIndex(portDirection, portName); + const auto variableIndex = isInput ? statement.inputs.at(portIndex) + : statement.outputs.at(portIndex); + if (variableIndex < 0) + continue; + + const auto placeholder = QByteArray(QByteArrayLiteral("$") + portName.toUtf8()); + const auto variable = QByteArray(QByteArrayLiteral("v") + QByteArray::number(variableIndex)); + line.replace(placeholder, variable); + } + + code << QByteArrayLiteral(" ") + replaceParameters(line, node, format); + } + + code << QByteArrayLiteral("}"); + code << QByteArray(); + return code.join('\n'); +} + +QT_END_NAMESPACE |