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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qsgflatcolormaterial.h"
#include <private/qsgmaterialshader_p.h>
QT_BEGIN_NAMESPACE
class FlatColorMaterialRhiShader : public QSGMaterialShader
{
public:
FlatColorMaterialRhiShader(int viewCount);
bool updateUniformData(RenderState &state, QSGMaterial *newMaterial, QSGMaterial *oldMaterial) override;
static QSGMaterialType type;
};
QSGMaterialType FlatColorMaterialRhiShader::type;
FlatColorMaterialRhiShader::FlatColorMaterialRhiShader(int viewCount)
{
setShaderFileName(VertexStage, QStringLiteral(":/qt-project.org/scenegraph/shaders_ng/flatcolor.vert.qsb"), viewCount);
setShaderFileName(FragmentStage, QStringLiteral(":/qt-project.org/scenegraph/shaders_ng/flatcolor.frag.qsb"), viewCount);
}
bool FlatColorMaterialRhiShader::updateUniformData(RenderState &state,
QSGMaterial *newMaterial,
QSGMaterial *oldMaterial)
{
Q_ASSERT(!oldMaterial || newMaterial->type() == oldMaterial->type());
QSGFlatColorMaterial *oldMat = static_cast<QSGFlatColorMaterial *>(oldMaterial);
QSGFlatColorMaterial *mat = static_cast<QSGFlatColorMaterial *>(newMaterial);
bool changed = false;
QByteArray *buf = state.uniformData();
const int shaderMatrixCount = newMaterial->viewCount();
const int matrixCount = qMin(state.projectionMatrixCount(), shaderMatrixCount);
for (int viewIndex = 0; viewIndex < matrixCount; ++viewIndex) {
if (state.isMatrixDirty()) {
const QMatrix4x4 m = state.combinedMatrix(viewIndex);
memcpy(buf->data() + 64 * viewIndex, m.constData(), 64);
changed = true;
}
}
const QColor &c = mat->color();
if (!oldMat || c != oldMat->color() || state.isOpacityDirty()) {
float r, g, b, a;
c.getRgbF(&r, &g, &b, &a);
const float opacity = state.opacity() * a;
QVector4D v(r * opacity, g * opacity, b * opacity, opacity);
Q_ASSERT(sizeof(v) == 16);
memcpy(buf->data() + 64 * shaderMatrixCount, &v, 16);
changed = true;
}
return changed;
}
/*!
\class QSGFlatColorMaterial
\brief The QSGFlatColorMaterial class provides a convenient way of rendering
solid colored geometry in the scene graph.
\inmodule QtQuick
\ingroup qtquick-scenegraph-materials
\warning This utility class is only functional when running with the default
backend of the Qt Quick scenegraph.
The flat color material will fill every pixel in a geometry using
a solid color. The color can contain transparency.
The geometry to be rendered with a flat color material requires
vertices in attribute location 0 in the QSGGeometry object to render
correctly. The QSGGeometry::defaultAttributes_Point2D() returns an attribute
set compatible with this material.
The flat color material respects both current opacity and current matrix
when updating its rendering state.
*/
/*!
Constructs a new flat color material.
The default color is white.
*/
QSGFlatColorMaterial::QSGFlatColorMaterial() : m_color(QColor(255, 255, 255))
{
}
/*!
\fn const QColor &QSGFlatColorMaterial::color() const
Returns this flat color material's color.
The default color is white.
*/
/*!
Sets this flat color material's color to \a color.
*/
void QSGFlatColorMaterial::setColor(const QColor &color)
{
m_color = color;
setFlag(Blending, m_color.alpha() != 0xff);
}
/*!
\internal
*/
QSGMaterialType *QSGFlatColorMaterial::type() const
{
return &FlatColorMaterialRhiShader::type;
}
/*!
\internal
*/
QSGMaterialShader *QSGFlatColorMaterial::createShader(QSGRendererInterface::RenderMode renderMode) const
{
Q_UNUSED(renderMode);
return new FlatColorMaterialRhiShader(viewCount());
}
/*!
\internal
*/
int QSGFlatColorMaterial::compare(const QSGMaterial *other) const
{
const QSGFlatColorMaterial *flat = static_cast<const QSGFlatColorMaterial *>(other);
return m_color.rgba() - flat->color().rgba();
}
QT_END_NAMESPACE
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