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Diffstat (limited to 'src/render/backend/uniform_p.h')
| -rw-r--r-- | src/render/backend/uniform_p.h | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/src/render/backend/uniform_p.h b/src/render/backend/uniform_p.h new file mode 100644 index 000000000..aa4b06bf9 --- /dev/null +++ b/src/render/backend/uniform_p.h @@ -0,0 +1,208 @@ +/**************************************************************************** +** +** Copyright (C) 2016 Klaralvdalens Datakonsult AB (KDAB). +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the Qt3D 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. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QT3DRENDER_RENDER_UNIFORM_P_H +#define QT3DRENDER_RENDER_UNIFORM_P_H + +// +// W A R N I N G +// ------------- +// +// This file is not part of the Qt API. It exists for the convenience +// of other Qt classes. This header file may change from version to +// version without notice, or even be removed. +// +// We mean it. +// + +#include <qt3drender_global.h> +#include <Qt3DCore/qnodeid.h> + +#include <QMatrix4x4> +#include <QVector2D> +#include <QVector3D> +#include <QColor> + +#include <QDebug> +#include <string.h> + +QT_BEGIN_NAMESPACE + +namespace Qt3DRender { +namespace Render { + +enum UniformType { + Float = 0, + Vec2, + Vec3, + Vec4, + Double, + DVec2, + DVec3, + DVec4, + Int, + IVec2, + IVec3, + IVec4, + UInt, + UIVec2, + UIVec3, + UIVec4, + Bool, + BVec2, + BVec3, + BVec4, + Mat2, + Mat3, + Mat4, + Mat2x3, + Mat3x2, + Mat2x4, + Mat4x2, + Mat3x4, + Mat4x3, + Sampler, + Unknown +}; + +class Q_AUTOTEST_EXPORT UniformValue +{ +public: + enum ValueType { + ScalarValue, + NodeId, + TextureValue, + BufferValue + }; + + struct Texture { + int textureId = 0; // Set first so that glUniform1iv will work + Qt3DCore::QNodeId nodeId; + }; + + // UniformValue implicitely converts doubles to floats to ensure + // correct rendering behavior for the cases where Qt3D parameters created from + // a double or QVariant(double) are used to fill uniform values that in reality + // should be floats. This occur especially with QML where qreal might be double + // and not float. Otherwise, at when filling the uniforms, calling constData<float> + // on something that contains a double will result in wrong values + + UniformValue() {} + UniformValue(int i) { m_data.ivec[0] = i; } + UniformValue(uint i) { m_data.ivec[0] = i; } + UniformValue(float f) { m_data.fvec[0] = f; } + UniformValue(double d) { m_data.fvec[0] = d; } // Double to float conversion + UniformValue(bool b) { m_data.ivec[0] = b; } + UniformValue(const QVector2D &vec2) { memcpy(&m_data, &vec2, sizeof(QVector2D)); } + UniformValue(const QVector3D &vec3) { memcpy(&m_data, &vec3, sizeof(QVector3D)); } + UniformValue(const QVector4D &vec4) { memcpy(&m_data, &vec4, sizeof(QVector4D)); } + + UniformValue(const QMatrix3x3 &mat33) + { + // Use constData because we want column-major layout + memcpy(&m_data, mat33.constData(), 9 * sizeof(float)); + } + + UniformValue(const QMatrix4x4 &mat44) + { + // Use constData because we want column-major layout + memcpy(&m_data, mat44.constData(), 16 * sizeof(float)); + } + + // For nodes which will later be replaced by a Texture or Buffer + UniformValue(Qt3DCore::QNodeId id) + { + m_valueType = NodeId; + memcpy(&m_data, &id, sizeof(Qt3DCore::QNodeId)); + } + + // For textures + UniformValue(UniformValue::Texture t) + { + m_valueType = TextureValue; + memcpy(&m_data, &t, sizeof(Texture)); + } + + ValueType valueType() const { return m_valueType; } + + static UniformValue fromVariant(const QVariant &variant); + + template<typename T> + const T *constData() const + { + return reinterpret_cast<const T *>(&m_data); + } + + template<typename T> + T *data() + { + return reinterpret_cast<T *>(&m_data); + } + + bool operator==(const UniformValue &other) const + { + return memcmp(&m_data, &other.m_data, sizeof(u_Uniform)) == 0; + } + + bool operator!=(const UniformValue &other) const + { + return !(*this == other); + } +private: + union u_Uniform { + int ivec[4]; // store uint/ints/bools + float fvec[16]; // for matrix4 (note: we could have a special case for matrices) + + u_Uniform() + { + memset(this, 0, sizeof(u_Uniform)); + } + } m_data; + + ValueType m_valueType = ScalarValue; +}; + +} // namespace Render +} // namespace Qt3DRender + +QT_END_NAMESPACE + +Q_DECLARE_METATYPE(Qt3DRender::Render::UniformType) + +#endif // QT3DRENDER_RENDER_UNIFORM_P_H |