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/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL$
** 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 General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) 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.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-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <Qt3DCore/QEntity>
#include <Qt3DRender/QMaterial>
#include <Qt3DRender/QEffect>
#include <Qt3DRender/QTechnique>
#include <Qt3DRender/QParameter>
#include <Qt3DRender/QRenderPass>
#include <Qt3DRender/QShaderProgram>
#include <Qt3DRender/QGraphicsApiFilter>
#include <QtCore/QLoggingCategory>
#include "q3dsdefaultmaterialgenerator_p.h"
#include "q3dsutils_p.h"
#include "q3dslogging_p.h"
#include "q3dsgraphicslimits_p.h"
#include "shadergenerator/q3dsshadermanager_p.h"
QT_BEGIN_NAMESPACE
// List of Qt3D builtin Uniforms: (from RenderView)
//
// mat4 modelMatrix
// mat4 viewMatrix
// mat4 projectionMatrix
// mat4 modelView
// mat4 viewProjectionMatrix
// mat4 modelViewProjection or mvp
// mat4 inverseModelMatrix
// mat4 inverseViewMatrix
// mat4 inverseProjectionMatrix
// mat4 inverseModelView
// mat4 inverseViewProjectionMatrix
// mat4 inverseModelViewProjection
// mat3 modelNormalMatrix <- normal_matrix
// mat3 modelViewNormal
// mat4 viewportMatrix
// mat4 inverseViewportMatrix;
// float exposure
// float gamma
// float time
// vec3 eyePosition <- "eyePosition"
// List of Qt3D Default Attribute Names
//
// vec3 vertexPosition
// vec3 vertexNormal
// vec3 vertexColor
// vec2 vertexTexCoord
// vec3 vertexTangent
// List of Q3DS Default Attribute Names
//
// vec3 attr_textan;
// vec3 attr_binormal;
// vec3 attr_pos;
// vec3 attr_norm;
// vec2 attr_uv0
// Caller takes ownership everything generated in the method
Qt3DRender::QMaterial *Q3DSDefaultMaterialGenerator::generateMaterial(Q3DSDefaultMaterial *defaultMaterial,
Q3DSReferencedMaterial *referencedMaterial,
const QVector<Qt3DRender::QParameter *> ¶ms,
const QVector<Q3DSLightNode*> &lights,
Q3DSLayerNode *layer3DS)
{
Qt3DRender::QMaterial *material = new Qt3DRender::QMaterial;
Qt3DRender::QEffect *effect = new Qt3DRender::QEffect;
Qt3DRender::QTechnique *technique = new Qt3DRender::QTechnique;
Q3DSSceneManager::markAsMainTechnique(technique);
Q3DSLayerAttached *layerData = static_cast<Q3DSLayerAttached *>(layer3DS->attached());
Q_ASSERT(layerData);
Q3DSShaderFeatureSet features;
fillFeatureSet(&features, layer3DS, defaultMaterial, referencedMaterial);
Qt3DRender::QShaderProgram *shaderProgram = Q3DSShaderManager::instance().generateShaderProgram(*defaultMaterial,
referencedMaterial,
lights,
false,
features);
// The returned program may be a cached instance, ensure it is not parented
// to the QMaterial by parenting it to something else now.
shaderProgram->setParent(layerData->entity);
for (Qt3DRender::QRenderPass *pass : Q3DSSceneManager::standardRenderPasses(shaderProgram,
layer3DS,
defaultMaterial->blendMode(),
defaultMaterial->displacementMap() != nullptr))
{
technique->addRenderPass(pass);
}
addDefaultApiFilter(technique);
effect->addTechnique(technique);
if (hasCompute()) {
for (Qt3DRender::QTechnique *computeTechnique : Q3DSSceneManager::computeTechniques(layer3DS))
effect->addTechnique(computeTechnique);
}
static const bool paramDebug = qEnvironmentVariableIntValue("Q3DS_DEBUG") >= 2;
if (paramDebug)
qCDebug(lcScene) << effect << "for default material" << defaultMaterial->id() << "has parameters:";
for (Qt3DRender::QParameter *param : params) {
effect->addParameter(param);
if (paramDebug)
qCDebug(lcScene) << " " << param << param->name() << param->value();
}
material->setEffect(effect);
return material;
}
void Q3DSDefaultMaterialGenerator::addDefaultApiFilter(Qt3DRender::QTechnique *technique, bool *isGLES)
{
Q3DSGraphicsLimits gfxLimits = Q3DS::graphicsLimits();
const bool isOpenGLES = gfxLimits.format.renderableType() == QSurfaceFormat::OpenGLES;
if (isGLES)
*isGLES = isOpenGLES;
if (isOpenGLES)
technique->graphicsApiFilter()->setApi(Qt3DRender::QGraphicsApiFilter::OpenGLES);
else
technique->graphicsApiFilter()->setApi(Qt3DRender::QGraphicsApiFilter::OpenGL);
technique->graphicsApiFilter()->setMajorVersion(gfxLimits.format.majorVersion());
technique->graphicsApiFilter()->setMinorVersion(gfxLimits.format.minorVersion());
if (gfxLimits.format.profile() == QSurfaceFormat::CoreProfile)
technique->graphicsApiFilter()->setProfile(Qt3DRender::QGraphicsApiFilter::CoreProfile);
}
bool Q3DSDefaultMaterialGenerator::hasCompute()
{
Q3DSGraphicsLimits gfxLimits = Q3DS::graphicsLimits();
const bool isOpenGLES = gfxLimits.format.renderableType() == QSurfaceFormat::OpenGLES;
if (isOpenGLES)
return gfxLimits.format.version() >= qMakePair(3, 1);
else
return gfxLimits.format.version() >= qMakePair(4, 3);
}
void Q3DSDefaultMaterialGenerator::fillFeatureSet(Q3DSShaderFeatureSet *features,
Q3DSLayerNode *layer3DS,
Q3DSDefaultMaterial *material,
Q3DSReferencedMaterial *referencedMaterial)
{
Q3DSLayerAttached *layerData = static_cast<Q3DSLayerAttached *>(layer3DS->attached());
Q_ASSERT(layerData);
// Figure out if IBL data has been set
bool enableLightProbe = false;
bool enableLightProbe2 = false;
bool enableIblFov = false;
// Check Layer
if (layer3DS->lightProbe())
enableLightProbe = true;
if (layer3DS->lightProbe2())
enableLightProbe2 = true;
if (layer3DS->probeFov() < 180.0f && enableLightProbe)
enableIblFov = true;
// Check for Override in material or referenced material
if (material->lightProbe() || (referencedMaterial && referencedMaterial->lightProbe()))
enableLightProbe = true;
features->append(Q3DSShaderPreprocessorFeature(QLatin1String("QT3DS_ENABLE_CG_LIGHTING"), true));
features->append(Q3DSShaderPreprocessorFeature(QLatin1String("QT3DS_ENABLE_IBL_FOV"), enableIblFov));
features->append(Q3DSShaderPreprocessorFeature(QLatin1String("QT3DS_ENABLE_LIGHT_PROBE"), enableLightProbe));
features->append(Q3DSShaderPreprocessorFeature(QLatin1String("QT3DS_ENABLE_LIGHT_PROBE_2"), enableLightProbe2));
features->append(Q3DSShaderPreprocessorFeature(QLatin1String("QT3DS_ENABLE_SSDO"), false));
features->append(Q3DSShaderPreprocessorFeature(QLatin1String("QT3DS_ENABLE_SSM"), !layerData->shadowMapData.shadowCasters.isEmpty()));
features->append(Q3DSShaderPreprocessorFeature(QLatin1String("QT3DS_ENABLE_SSAO"), layerData->ssaoTextureData.enabled));
}
QT_END_NAMESPACE
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