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Diffstat (limited to 'src/core/render/backend/rendershader.cpp')
| -rw-r--r-- | src/core/render/backend/rendershader.cpp | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/src/core/render/backend/rendershader.cpp b/src/core/render/backend/rendershader.cpp new file mode 100644 index 000000000..243cf4ffa --- /dev/null +++ b/src/core/render/backend/rendershader.cpp @@ -0,0 +1,150 @@ +/**************************************************************************** +** +** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB). +** Contact: http://www.qt-project.org/legal +** +** 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 Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/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 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, Digia gives you certain additional +** rights. These rights are described in the Digia 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. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "rendershader.h" + +#include <QDebug> +#include <QOpenGLContext> +#include <QOpenGLShaderProgram> + +#include <shaderprogram.h> + +namespace Qt3D +{ + +RenderShader::RenderShader(ShaderProgram *peer) : + m_program(NULL), + m_peer(peer) +{ + Q_ASSERT(peer); +} + +QOpenGLShaderProgram *RenderShader::getOrCreateProgram() +{ + if (!m_program) { + // waiting for shader source to be loaded + if (!m_peer->isLoaded()) { + + // FIXME - should not be done in the backend! + m_peer->load(); + //return NULL; + } + + m_program = createProgram(); + if (!m_program) + m_program = createDefaultProgram(); + } + + return m_program; +} + +void RenderShader::setStandardUniform(Parameter::StandardUniform su, QString name) +{ + Q_ASSERT(su != Parameter::None); + Q_ASSERT(!name.isEmpty()); + int index = static_cast<int>(su); + if (index >= m_standardUniformNames.size()) + m_standardUniformNames.resize(index + 1); + m_standardUniformNames[index] = name; +} + +QString RenderShader::name() const +{ + return m_peer->objectName(); +} + +QOpenGLShaderProgram* RenderShader::createProgram() +{ + Q_ASSERT(QOpenGLContext::currentContext()); + // scoped pointer so early-returns delete automatically + QScopedPointer<QOpenGLShaderProgram> p(new QOpenGLShaderProgram); + bool ok = p->addShaderFromSourceCode(QOpenGLShader::Vertex, + m_peer->vertexSourceCode()); + if (!ok) { + qWarning() << "bad vertex source:" << m_program->log(); + return NULL; + } + + ok = p->addShaderFromSourceCode(QOpenGLShader::Fragment, + m_peer->fragmentSourceCode()); + if (!ok) { + qWarning() << "bad fragment source:" << m_program->log(); + return NULL; + } + + ok = p->link(); + if (!ok) { + qWarning() << "program failed to link:" << m_program->log(); + return NULL; + } + + m_standardUniformLocations.resize(m_standardUniformNames.size()); + for (int i=0; i<m_standardUniformNames.size(); ++i) { + QString n = m_standardUniformNames.at(i); + if (n.isEmpty()) { + m_standardUniformLocations[i] = -1; + continue; + } + + m_standardUniformLocations[i] = p->uniformLocation(n); + // qDebug() << "resolved location" << m_standardUniformLocations[i] << + // "for uniform" << n; + } + + // take from scoped-pointer so it doesn't get deleted + return p.take(); +} + +QOpenGLShaderProgram* RenderShader::createDefaultProgram() +{ + QOpenGLShaderProgram* p = new QOpenGLShaderProgram; + p->addShaderFromSourceCode(QOpenGLShader::Vertex, + ""); + + p->addShaderFromSourceCode(QOpenGLShader::Fragment, + ""); + + p->link(); + + return p; +} + +} // of namespace Qt3D |