1 | // Copyright (C) 2016 The Qt Company Ltd. |
---|---|
2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only |
3 | |
4 | #ifdef QTGRAPHS_QUTILS_H |
5 | #error Mixing QtDataVisualization and QtGraphs in the same TU is unsupported since they use\ |
6 | the same class names. |
7 | #endif |
8 | |
9 | #ifndef QTDATAVIS3D_QUTILS_H |
10 | #define QTDATAVIS3D_QUTILS_H |
11 | |
12 | #include <QtGui/QSurfaceFormat> |
13 | #include <QtGui/QOpenGLContext> |
14 | #include <QtGui/QOpenGLFunctions> |
15 | #include <QtGui/QOffscreenSurface> |
16 | #include <QtCore/QCoreApplication> |
17 | |
18 | QT_BEGIN_NAMESPACE |
19 | |
20 | [[maybe_unused]] |
21 | static inline QSurfaceFormat qDefaultSurfaceFormat(bool antialias) |
22 | { |
23 | bool isES = false; |
24 | |
25 | QSurfaceFormat surfaceFormat; |
26 | |
27 | // Common attributes |
28 | surfaceFormat.setDepthBufferSize(24); |
29 | surfaceFormat.setStencilBufferSize(8); |
30 | surfaceFormat.setSwapBehavior(QSurfaceFormat::DoubleBuffer); |
31 | surfaceFormat.setRenderableType(QSurfaceFormat::DefaultRenderableType); |
32 | |
33 | QOpenGLContext *ctx = QOpenGLContext::currentContext(); |
34 | QOffscreenSurface *dummySurface = nullptr; |
35 | if (!ctx) { |
36 | dummySurface = new QOffscreenSurface(); |
37 | dummySurface->setFormat(surfaceFormat); |
38 | dummySurface->create(); |
39 | ctx = new QOpenGLContext; |
40 | ctx->setFormat(surfaceFormat); |
41 | ctx->create(); |
42 | ctx->makeCurrent(surface: dummySurface); |
43 | } |
44 | |
45 | #if QT_CONFIG(opengles2) |
46 | isES = true; |
47 | #elif (QT_VERSION < QT_VERSION_CHECK(5, 3, 0)) |
48 | isES = false; |
49 | #else |
50 | isES = ctx->isOpenGLES(); |
51 | #endif |
52 | |
53 | #if (QT_VERSION >= QT_VERSION_CHECK(5, 4, 0)) |
54 | // We support only ES2 emulation with software renderer for now |
55 | QString versionStr; |
56 | #ifdef Q_OS_WIN |
57 | const GLubyte *openGLVersion = ctx->functions()->glGetString(GL_VERSION); |
58 | versionStr = QString::fromLatin1(reinterpret_cast<const char *>(openGLVersion)).toLower(); |
59 | #endif |
60 | if (versionStr.contains(QStringLiteral("mesa")) |
61 | || QCoreApplication::testAttribute(attribute: Qt::AA_UseSoftwareOpenGL)) { |
62 | qWarning(msg: "Only OpenGL ES2 emulation is available for software rendering."); |
63 | isES = true; |
64 | } |
65 | #endif |
66 | |
67 | if (dummySurface) { |
68 | ctx->doneCurrent(); |
69 | delete ctx; |
70 | delete dummySurface; |
71 | } |
72 | |
73 | if (isES) { |
74 | // For ES2 only attributes |
75 | surfaceFormat.setRedBufferSize(8); |
76 | surfaceFormat.setBlueBufferSize(8); |
77 | surfaceFormat.setGreenBufferSize(8); |
78 | } else { |
79 | surfaceFormat.setVersion(major: 2, minor: 1); |
80 | surfaceFormat.setProfile(QSurfaceFormat::CoreProfile); |
81 | // For OpenGL only attributes |
82 | if (antialias) |
83 | surfaceFormat.setSamples(8); |
84 | else |
85 | surfaceFormat.setSamples(0); |
86 | } |
87 | |
88 | return surfaceFormat; |
89 | } |
90 | |
91 | QT_END_NAMESPACE |
92 | |
93 | #endif |
94 |