1// Copyright (C) 2016 Klaralvdalens Datakonsult AB (KDAB).
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#include "scene3dsgmaterialshader_p.h"
5
6#include <qopenglcontext.h>
7#include <qopenglfunctions.h>
8#include <QtGui/qsurfaceformat.h>
9
10#include <scene3dsgmaterial_p.h>
11
12QT_BEGIN_NAMESPACE
13
14namespace {
15
16inline bool isPowerOfTwo(int x)
17{
18 // Assumption: x >= 1
19 return x == (x & -x);
20}
21
22}
23
24namespace Qt3DRender {
25
26/*!
27 \class Qt3DCore::SCene3DMaterialShader
28 \internal
29
30 \brief The Qt3DRender::Scene3DSGMaterialShader class is a custom
31 QSGMaterialShader subclass instantiated by a Qt3DRender::Scene3DSGMateria1
32
33 The Qt3DRender::Scene3DSGMaterialShader provides a shader that renders a texture
34 using premultiplied alpha.
35 */
36
37QSGMaterialType Scene3DSGMaterialShader::type;
38
39Scene3DSGMaterialShader::Scene3DSGMaterialShader()
40 : QSGMaterialShader()
41{
42 // Generated with qsb, we target all GL version Qt3D can handle
43 // qsb -b --glsl "460,450,440,430,420,410,400,330,150,120,320 es,300 es,100 es" --hlsl 50 --msl 12 -o scene3dmaterial.vert.qsb scene3dmaterial.vert
44 // qsb --glsl "460,450,440,430,420,410,400,330,150,120,320 es,300 es,100 es" --hlsl 50 --msl 12 -o scene3dmaterial.frag.qsb scene3dmaterial.frag
45 setShaderFileName(stage: VertexStage, filename: QLatin1String(":/shaders/scene3dmaterial.vert.qsb"));
46 setShaderFileName(stage: FragmentStage, filename: QLatin1String(":/shaders/scene3dmaterial.frag.qsb"));
47}
48
49bool Scene3DSGMaterialShader::updateUniformData(QSGMaterialShader::RenderState &state,
50 QSGMaterial *newMaterial,
51 QSGMaterial *oldMaterial)
52{
53 // layout(std140, binding = 0) uniform buf {
54 // mat4 qt_Matrix; // offset 0, sizeof(float) * 16
55 // float qt_Opacity; // offset sizeof(float) * 16, sizeof(float)
56 // bool visible; // offset sizeof(float) * 17, sizeof(float)
57 // };
58
59 QByteArray *buf = state.uniformData();
60 Q_ASSERT(buf->size() >= int(18 * sizeof(float)));
61 Scene3DSGMaterial *tx = static_cast<Scene3DSGMaterial *>(newMaterial);
62 Scene3DSGMaterial *oldTx = static_cast<Scene3DSGMaterial *>(oldMaterial);
63
64 bool updateMade = false;
65
66 if (state.isMatrixDirty()) {
67 const QMatrix4x4 &m = state.combinedMatrix();
68 memcpy(dest: buf->data(), src: m.constData(), n: 16 * sizeof(float));
69 updateMade = true;
70 }
71
72 if (state.isOpacityDirty()) {
73 const float opacity = state.opacity();
74 memcpy(dest: buf->data() + 16 * sizeof(float), src: &opacity, n: sizeof(float));
75 updateMade = true;
76 }
77
78 if (oldTx == nullptr || oldTx->visible() != tx->visible()) {
79 const float value = tx->visible() ? 1.0f : -1.0f;
80 memcpy(dest: buf->data() + 17 * sizeof(float), src: &value, n: sizeof(float));
81 updateMade = true;
82 }
83
84 return updateMade;
85}
86
87void Scene3DSGMaterialShader::updateSampledImage(QSGMaterialShader::RenderState &state,
88 int binding,
89 QSGTexture **texture,
90 QSGMaterial *newMaterial,
91 QSGMaterial *oldMaterial)
92{
93 Q_UNUSED(state);
94 Q_UNUSED(binding);
95 Scene3DSGMaterial *tx = static_cast<Scene3DSGMaterial *>(newMaterial);
96 Scene3DSGMaterial *oldTx = static_cast<Scene3DSGMaterial *>(oldMaterial);
97 QSGTexture *t = tx->texture();
98
99 if (t != nullptr) {
100 // TODO QT6 FIXME
101 // bool npotSupported = const_cast<QOpenGLContext *>(state.context())
102 // ->functions()->hasOpenGLFeature(QOpenGLFunctions::NPOTTextureRepeat);
103 bool npotSupported = true;
104 if (!npotSupported) {
105 const QSize size = t->textureSize();
106 const bool isNpot = !isPowerOfTwo(x: size.width()) || !isPowerOfTwo(x: size.height());
107 if (isNpot) {
108 t->setHorizontalWrapMode(QSGTexture::ClampToEdge);
109 t->setVerticalWrapMode(QSGTexture::ClampToEdge);
110 }
111 }
112
113 if (oldTx == nullptr || oldTx->texture() != t)
114 *texture = t;
115 }
116}
117
118} // namespace Qt3DRender
119
120QT_END_NAMESPACE
121

source code of qt3d/src/quick3d/imports/scene3d/scene3dsgmaterialshader.cpp