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Diffstat (limited to 'src/imports/shaders/scenegraph/qsggeometry.h')
| -rw-r--r-- | src/imports/shaders/scenegraph/qsggeometry.h | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/src/imports/shaders/scenegraph/qsggeometry.h b/src/imports/shaders/scenegraph/qsggeometry.h new file mode 100644 index 0000000..b6663f8 --- /dev/null +++ b/src/imports/shaders/scenegraph/qsggeometry.h @@ -0,0 +1,234 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QML Shaders plugin of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QSGGEOMETRY_H +#define QSGGEOMETRY_H + +#include <QtOpenGL/qgl.h> + +QT_BEGIN_HEADER + +QT_BEGIN_NAMESPACE + +class QSGGeometry +{ +public: + struct Attribute + { + int position; + int tupleSize; + int type; + }; + + struct AttributeSet { + int count; + int stride; + const Attribute *attributes; + }; + + struct Point2D { float x, y; }; + struct TexturedPoint2D { float x, y; float tx, ty; }; + struct ColoredPoint2D { float x, y; unsigned char r, g, b, a; }; + + static const AttributeSet &defaultAttributes_Point2D(); + static const AttributeSet &defaultAttributes_TexturedPoint2D(); + static const AttributeSet &defaultAttributes_ColoredPoint2D(); + + QSGGeometry(const QSGGeometry::AttributeSet &attribs, + int vertexCount, + int indexCount = 0, + int indexType = GL_UNSIGNED_SHORT); + ~QSGGeometry(); + + void setDrawingMode(GLenum mode); + inline GLenum drawingMode() const { return m_drawing_mode; } + + void allocate(int vertexCount, int indexCount = 0); + + int vertexCount() const { return m_vertex_count; } + + void *vertexData() { return m_data; } + inline Point2D *vertexDataAsPoint2D(); + inline TexturedPoint2D *vertexDataAsTexturedPoint2D(); + inline ColoredPoint2D *vertexDataAsColoredPoint2D(); + + inline const void *vertexData() const { return m_data; } + inline const Point2D *vertexDataAsPoint2D() const; + inline const TexturedPoint2D *vertexDataAsTexturedPoint2D() const; + inline const ColoredPoint2D *vertexDataAsColoredPoint2D() const; + + inline int indexType() const { return m_index_type; } + + int indexCount() const { return m_index_count; } + + void *indexData(); + inline uint *indexDataAsUInt(); + inline quint16 *indexDataAsUShort(); + + const void *indexData() const; + inline const uint *indexDataAsUInt() const; + inline const quint16 *indexDataAsUShort() const; + + inline int attributeCount() const { return m_attributes.count; } + inline const Attribute *attributes() const { return m_attributes.attributes; } + inline int stride() const { return m_attributes.stride; } + + static void updateRectGeometry(QSGGeometry *g, const QRectF &rect); + static void updateTexturedRectGeometry(QSGGeometry *g, const QRectF &rect, const QRectF &sourceRect); + +private: + int m_drawing_mode; + int m_vertex_count; + int m_index_count; + int m_index_type; + const AttributeSet &m_attributes; + void *m_data; + int m_index_data_offset; + + void *m_reserved_pointer; + + uint m_owns_data : 1; + uint m_reserved_bits : 31; + + float m_prealloc[16]; +}; + +inline uint *QSGGeometry::indexDataAsUInt() +{ + Q_ASSERT(m_index_type == GL_UNSIGNED_INT); + return (uint *) indexData(); +} + +inline quint16 *QSGGeometry::indexDataAsUShort() +{ + Q_ASSERT(m_index_type == GL_UNSIGNED_SHORT); + return (quint16 *) indexData(); +} + +inline const uint *QSGGeometry::indexDataAsUInt() const +{ + Q_ASSERT(m_index_type == GL_UNSIGNED_INT); + return (uint *) indexData(); +} + +inline const quint16 *QSGGeometry::indexDataAsUShort() const +{ + Q_ASSERT(m_index_type == GL_UNSIGNED_SHORT); + return (quint16 *) indexData(); +} + +inline QSGGeometry::Point2D *QSGGeometry::vertexDataAsPoint2D() +{ + Q_ASSERT(m_attributes.count == 1); + Q_ASSERT(m_attributes.stride == 2 * sizeof(float)); + Q_ASSERT(m_attributes.attributes[0].tupleSize == 2); + Q_ASSERT(m_attributes.attributes[0].type == GL_FLOAT); + Q_ASSERT(m_attributes.attributes[0].position == 0); + return (Point2D *) m_data; +} + +inline QSGGeometry::TexturedPoint2D *QSGGeometry::vertexDataAsTexturedPoint2D() +{ + Q_ASSERT(m_attributes.count == 2); + Q_ASSERT(m_attributes.stride == 4 * sizeof(float)); + Q_ASSERT(m_attributes.attributes[0].position == 0); + Q_ASSERT(m_attributes.attributes[0].tupleSize == 2); + Q_ASSERT(m_attributes.attributes[0].type == GL_FLOAT); + Q_ASSERT(m_attributes.attributes[1].position == 1); + Q_ASSERT(m_attributes.attributes[1].tupleSize == 2); + Q_ASSERT(m_attributes.attributes[1].type == GL_FLOAT); + return (TexturedPoint2D *) m_data; +} + +inline QSGGeometry::ColoredPoint2D *QSGGeometry::vertexDataAsColoredPoint2D() +{ + Q_ASSERT(m_attributes.count == 2); + Q_ASSERT(m_attributes.stride == 2 * sizeof(float) + 4 * sizeof(char)); + Q_ASSERT(m_attributes.attributes[0].position == 0); + Q_ASSERT(m_attributes.attributes[0].tupleSize == 2); + Q_ASSERT(m_attributes.attributes[0].type == GL_FLOAT); + Q_ASSERT(m_attributes.attributes[1].position == 1); + Q_ASSERT(m_attributes.attributes[1].tupleSize == 4); + Q_ASSERT(m_attributes.attributes[1].type == GL_UNSIGNED_BYTE); + return (ColoredPoint2D *) m_data; +} + +inline const QSGGeometry::Point2D *QSGGeometry::vertexDataAsPoint2D() const +{ + Q_ASSERT(m_attributes.count == 1); + Q_ASSERT(m_attributes.stride == 2 * sizeof(float)); + Q_ASSERT(m_attributes.attributes[0].tupleSize == 2); + Q_ASSERT(m_attributes.attributes[0].type == GL_FLOAT); + Q_ASSERT(m_attributes.attributes[0].position == 0); + return (const Point2D *) m_data; +} + +inline const QSGGeometry::TexturedPoint2D *QSGGeometry::vertexDataAsTexturedPoint2D() const +{ + Q_ASSERT(m_attributes.count == 2); + Q_ASSERT(m_attributes.stride == 4 * sizeof(float)); + Q_ASSERT(m_attributes.attributes[0].position == 0); + Q_ASSERT(m_attributes.attributes[0].tupleSize == 2); + Q_ASSERT(m_attributes.attributes[0].type == GL_FLOAT); + Q_ASSERT(m_attributes.attributes[1].position == 1); + Q_ASSERT(m_attributes.attributes[1].tupleSize == 2); + Q_ASSERT(m_attributes.attributes[1].type == GL_FLOAT); + return (const TexturedPoint2D *) m_data; +} + +inline const QSGGeometry::ColoredPoint2D *QSGGeometry::vertexDataAsColoredPoint2D() const +{ + Q_ASSERT(m_attributes.count == 2); + Q_ASSERT(m_attributes.stride == 2 * sizeof(float) + 4 * sizeof(char)); + Q_ASSERT(m_attributes.attributes[0].position == 0); + Q_ASSERT(m_attributes.attributes[0].tupleSize == 2); + Q_ASSERT(m_attributes.attributes[0].type == GL_FLOAT); + Q_ASSERT(m_attributes.attributes[1].position == 1); + Q_ASSERT(m_attributes.attributes[1].tupleSize == 4); + Q_ASSERT(m_attributes.attributes[1].type == GL_UNSIGNED_BYTE); + return (const ColoredPoint2D *) m_data; +} + +QT_END_NAMESPACE + +QT_END_HEADER + +#endif // QSGGEOMETRY_H |