| /**************************************************************************** |
| ** |
| ** 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. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
| ** GNU Lesser General Public License Usage |
| ** 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. |
| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU General |
| ** Public License version 3.0 as published by the Free Software Foundation |
| ** and appearing in the file LICENSE.GPL included in the packaging of this |
| ** file. Please review the following information to ensure the GNU General |
| ** Public License version 3.0 requirements will be met: |
| ** http://www.gnu.org/copyleft/gpl.html. |
| ** |
| ** Other Usage |
| ** Alternatively, this file may be used in accordance with the terms and |
| ** conditions contained in a signed written agreement between you and Nokia. |
| ** |
| ** |
| ** |
| ** |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #include "qsggeometry.h" |
| |
| QT_BEGIN_NAMESPACE |
| |
| |
| const QSGGeometry::AttributeSet &QSGGeometry::defaultAttributes_Point2D() |
| { |
| static Attribute data[] = { |
| { 0, 2, GL_FLOAT } |
| }; |
| static AttributeSet attrs = { 1, sizeof(float) * 2, data }; |
| return attrs; |
| } |
| |
| |
| const QSGGeometry::AttributeSet &QSGGeometry::defaultAttributes_TexturedPoint2D() |
| { |
| static Attribute data[] = { |
| { 0, 2, GL_FLOAT }, |
| { 1, 2, GL_FLOAT } |
| }; |
| static AttributeSet attrs = { 2, sizeof(float) * 4, data }; |
| return attrs; |
| } |
| |
| |
| const QSGGeometry::AttributeSet &QSGGeometry::defaultAttributes_ColoredPoint2D() |
| { |
| static Attribute data[] = { |
| { 0, 2, GL_FLOAT }, |
| { 1, 4, GL_UNSIGNED_BYTE } |
| }; |
| static AttributeSet attrs = { 2, 2 * sizeof(float) + 4 * sizeof(char), data }; |
| return attrs; |
| } |
| |
| |
| |
| QSGGeometry::QSGGeometry(const QSGGeometry::AttributeSet &attributes, |
| int vertexCount, |
| int indexCount, |
| int indexType) |
| : m_drawing_mode(GL_TRIANGLE_STRIP) |
| , m_vertex_count(0) |
| , m_index_count(0) |
| , m_index_type(indexType) |
| , m_attributes(attributes) |
| , m_data(0) |
| , m_index_data_offset(-1) |
| , m_owns_data(false) |
| { |
| Q_ASSERT(m_attributes.count > 0); |
| Q_ASSERT(m_attributes.stride > 0); |
| |
| // Because allocate reads m_vertex_count, m_index_count and m_owns_data, these |
| // need to be set before calling allocate... |
| allocate(vertexCount, indexCount); |
| } |
| |
| QSGGeometry::~QSGGeometry() |
| { |
| if (m_owns_data) |
| qFree(m_data); |
| } |
| |
| void *QSGGeometry::indexData() |
| { |
| return m_index_data_offset < 0 |
| ? 0 |
| : ((char *) m_data + m_index_data_offset); |
| } |
| |
| const void *QSGGeometry::indexData() const |
| { |
| return m_index_data_offset < 0 |
| ? 0 |
| : ((char *) m_data + m_index_data_offset); |
| } |
| |
| void QSGGeometry::setDrawingMode(GLenum mode) |
| { |
| m_drawing_mode = mode; |
| } |
| |
| void QSGGeometry::allocate(int vertexCount, int indexCount) |
| { |
| if (vertexCount == m_vertex_count && indexCount == m_index_count) |
| return; |
| |
| m_vertex_count = vertexCount; |
| m_index_count = indexCount; |
| |
| bool canUsePrealloc = m_index_count <= 0; |
| int vertexByteSize = m_attributes.stride * m_vertex_count; |
| |
| if (m_owns_data) |
| qFree(m_data); |
| |
| if (canUsePrealloc && vertexByteSize <= (int) sizeof(m_prealloc)) { |
| m_data = (void *) &m_prealloc[0]; |
| m_index_data_offset = -1; |
| m_owns_data = false; |
| } else { |
| Q_ASSERT(m_index_type == GL_UNSIGNED_INT || m_index_type == GL_UNSIGNED_SHORT); |
| int indexByteSize = indexCount * (m_index_type == GL_UNSIGNED_SHORT ? sizeof(quint16) : sizeof(quint32)); |
| m_data = (void *) qMalloc(vertexByteSize + indexByteSize); |
| m_index_data_offset = vertexByteSize; |
| m_owns_data = true; |
| } |
| |
| } |
| |
| void QSGGeometry::updateRectGeometry(QSGGeometry *g, const QRectF &rect) |
| { |
| Point2D *v = g->vertexDataAsPoint2D(); |
| v[0].x = rect.left(); |
| v[0].y = rect.top(); |
| |
| v[1].x = rect.right(); |
| v[1].y = rect.top(); |
| |
| v[2].x = rect.left(); |
| v[2].y = rect.bottom(); |
| |
| v[3].x = rect.right(); |
| v[3].y = rect.bottom(); |
| } |
| |
| void QSGGeometry::updateTexturedRectGeometry(QSGGeometry *g, const QRectF &rect, const QRectF &textureRect) |
| { |
| TexturedPoint2D *v = g->vertexDataAsTexturedPoint2D(); |
| v[0].x = rect.left(); |
| v[0].y = rect.top(); |
| v[0].tx = textureRect.left(); |
| v[0].ty = textureRect.top(); |
| |
| v[1].x = rect.right(); |
| v[1].y = rect.top(); |
| v[1].tx = textureRect.right(); |
| v[1].ty = textureRect.top(); |
| |
| v[2].x = rect.left(); |
| v[2].y = rect.bottom(); |
| v[2].tx = textureRect.left(); |
| v[2].ty = textureRect.bottom(); |
| |
| v[3].x = rect.right(); |
| v[3].y = rect.bottom(); |
| v[3].tx = textureRect.right(); |
| v[3].ty = textureRect.bottom(); |
| } |
| |
| QT_END_NAMESPACE |