File indexing completed on 2025-03-23 11:13:57

 /*
     KWin - the KDE window manager
     This file is part of the KDE project.
 
     SPDX-FileCopyrightText: 2010 Fredrik Höglund <fredrik@kde.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "kwinglplatform.h"
 // include kwinglutils_funcs.h to avoid the redeclaration issues
 // between qopengl.h and epoxy/gl.h
 #include "kwinglutils_funcs.h"
 #include <epoxy/gl.h>
 
 #include <QDebug>
 #include <QOpenGLContext>
 #include <QRegularExpression>
 #include <QStringList>
 
 #include <sys/utsname.h>
 
 #include <iomanip>
 #include <ios>
 #include <iostream>
 
 namespace KWin
 {
 
 std::unique_ptr<GLPlatform> GLPlatform::s_platform;
 
 static qint64 parseVersionString(const QByteArray &version)
 {
     // Skip any leading non digit
     int start = 0;
     while (start < version.length() && !QChar::fromLatin1(version[start]).isDigit()) {
         start++;
     }
 
     // Strip any non digit, non '.' characters from the end
     int end = start;
     while (end < version.length() && (version[end] == '.' || QChar::fromLatin1(version[end]).isDigit())) {
         end++;
     }
 
     const QByteArray result = version.mid(start, end - start);
     const QList<QByteArray> tokens = result.split('.');
     const qint64 major = tokens.at(0).toInt();
     const qint64 minor = tokens.count() > 1 ? tokens.at(1).toInt() : 0;
     const qint64 patch = tokens.count() > 2 ? tokens.at(2).toInt() : 0;
 
     return kVersionNumber(major, minor, patch);
 }
 
 static qint64 getXServerVersion()
 {
     qint64 major, minor, patch;
     major = 0;
     minor = 0;
     patch = 0;
 
     if (xcb_connection_t *c = connection()) {
         auto setup = xcb_get_setup(c);
         const QByteArray vendorName(xcb_setup_vendor(setup), xcb_setup_vendor_length(setup));
         if (vendorName.contains("X.Org")) {
             const int release = setup->release_number;
             major = (release / 10000000);
             minor = (release / 100000) % 100;
             patch = (release / 1000) % 100;
         }
     }
 
     return kVersionNumber(major, minor, patch);
 }
 
 static qint64 getKernelVersion()
 {
     struct utsname name;
     uname(&name);
 
     if (qstrcmp(name.sysname, "Linux") == 0) {
         return parseVersionString(name.release);
     }
 
     return 0;
 }
 
 // Extracts the portion of a string that matches a regular expression
 static QString extract(const QString &text, const QString &pattern)
 {
     const QRegularExpression regexp(pattern);
     const QRegularExpressionMatch match = regexp.match(text);
     if (!match.hasMatch()) {
         return QString();
     }
     return match.captured();
 }
 
 static ChipClass detectRadeonClass(const QByteArray &chipset)
 {
     if (chipset.isEmpty()) {
         return UnknownRadeon;
     }
 
     if (chipset.contains("R100")
         || chipset.contains("RV100")
         || chipset.contains("RS100")) {
         return R100;
     }
 
     if (chipset.contains("RV200")
         || chipset.contains("RS200")
         || chipset.contains("R200")
         || chipset.contains("RV250")
         || chipset.contains("RS300")
         || chipset.contains("RV280")) {
         return R200;
     }
 
     if (chipset.contains("R300")
         || chipset.contains("R350")
         || chipset.contains("R360")
         || chipset.contains("RV350")
         || chipset.contains("RV370")
         || chipset.contains("RV380")) {
         return R300;
     }
 
     if (chipset.contains("R420")
         || chipset.contains("R423")
         || chipset.contains("R430")
         || chipset.contains("R480")
         || chipset.contains("R481")
         || chipset.contains("RV410")
         || chipset.contains("RS400")
         || chipset.contains("RC410")
         || chipset.contains("RS480")
         || chipset.contains("RS482")
         || chipset.contains("RS600")
         || chipset.contains("RS690")
         || chipset.contains("RS740")) {
         return R400;
     }
 
     if (chipset.contains("RV515")
         || chipset.contains("R520")
         || chipset.contains("RV530")
         || chipset.contains("R580")
         || chipset.contains("RV560")
         || chipset.contains("RV570")) {
         return R500;
     }
 
     if (chipset.contains("R600")
         || chipset.contains("RV610")
         || chipset.contains("RV630")
         || chipset.contains("RV670")
         || chipset.contains("RV620")
         || chipset.contains("RV635")
         || chipset.contains("RS780")
         || chipset.contains("RS880")) {
         return R600;
     }
 
     if (chipset.contains("R700")
         || chipset.contains("RV770")
         || chipset.contains("RV730")
         || chipset.contains("RV710")
         || chipset.contains("RV740")) {
         return R700;
     }
 
     if (chipset.contains("EVERGREEN") // Not an actual chipset, but returned by R600G in 7.9
         || chipset.contains("CEDAR")
         || chipset.contains("REDWOOD")
         || chipset.contains("JUNIPER")
         || chipset.contains("CYPRESS")
         || chipset.contains("HEMLOCK")
         || chipset.contains("PALM")) {
         return Evergreen;
     }
 
     if (chipset.contains("SUMO")
         || chipset.contains("SUMO2")
         || chipset.contains("BARTS")
         || chipset.contains("TURKS")
         || chipset.contains("CAICOS")
         || chipset.contains("CAYMAN")) {
         return NorthernIslands;
     }
 
     if (chipset.contains("TAHITI")
         || chipset.contains("PITCAIRN")
         || chipset.contains("VERDE")
         || chipset.contains("OLAND")
         || chipset.contains("HAINAN")) {
         return SouthernIslands;
     }
 
     if (chipset.contains("BONAIRE")
         || chipset.contains("KAVERI")
         || chipset.contains("KABINI")
         || chipset.contains("HAWAII")
         || chipset.contains("MULLINS")) {
         return SeaIslands;
     }
 
     if (chipset.contains("TONGA")
         || chipset.contains("TOPAZ")
         || chipset.contains("FIJI")
         || chipset.contains("CARRIZO")
         || chipset.contains("STONEY")) {
         return VolcanicIslands;
     }
 
     if (chipset.contains("POLARIS10")
         || chipset.contains("POLARIS11")
         || chipset.contains("POLARIS12")
         || chipset.contains("VEGAM")) {
         return ArcticIslands;
     }
 
     if (chipset.contains("VEGA10")
         || chipset.contains("VEGA12")
         || chipset.contains("VEGA20")
         || chipset.contains("RAVEN")
         || chipset.contains("RAVEN2")
         || chipset.contains("RENOIR")
         || chipset.contains("ARCTURUS")) {
         return Vega;
     }
 
     if (chipset.contains("NAVI10")
         || chipset.contains("NAVI12")
         || chipset.contains("NAVI14")) {
         return Navi;
     }
 
     const QString chipset16 = QString::fromLatin1(chipset);
     QString name = extract(chipset16, QStringLiteral("HD [0-9]{4}")); // HD followed by a space and 4 digits
     if (!name.isEmpty()) {
         const int id = QStringView(name).right(4).toInt();
         if (id == 6250 || id == 6310) { // Palm
             return Evergreen;
         }
 
         if (id >= 6000 && id < 7000) {
             return NorthernIslands; // HD 6xxx
         }
 
         if (id >= 5000 && id < 6000) {
             return Evergreen; // HD 5xxx
         }
 
         if (id >= 4000 && id < 5000) {
             return R700; // HD 4xxx
         }
 
         if (id >= 2000 && id < 4000) { // HD 2xxx/3xxx
             return R600;
         }
 
         return UnknownRadeon;
     }
 
     name = extract(chipset16, QStringLiteral("X[0-9]{3,4}")); // X followed by 3-4 digits
     if (!name.isEmpty()) {
         const int id = QStringView(name).mid(1, -1).toInt();
 
         // X1xxx
         if (id >= 1300) {
             return R500;
         }
 
         // X7xx, X8xx, X12xx, 2100
         if ((id >= 700 && id < 1000) || id >= 1200) {
             return R400;
         }
 
         // X200, X3xx, X5xx, X6xx, X10xx, X11xx
         if ((id >= 300 && id < 700) || (id >= 1000 && id < 1200)) {
             return R300;
         }
 
         return UnknownRadeon;
     }
 
     name = extract(chipset16, QStringLiteral("\\b[0-9]{4}\\b")); // A group of 4 digits
     if (!name.isEmpty()) {
         const int id = name.toInt();
 
         // 7xxx
         if (id >= 7000 && id < 8000) {
             return R100;
         }
 
         // 8xxx, 9xxx
         if (id >= 8000 && id < 9500) {
             return R200;
         }
 
         // 9xxx
         if (id >= 9500) {
             return R300;
         }
 
         if (id == 2100) {
             return R400;
         }
     }
 
     return UnknownRadeon;
 }
 
 static ChipClass detectNVidiaClass(const QString &chipset)
 {
     QString name = extract(chipset, QStringLiteral("\\bNV[0-9,A-F]{2}\\b")); // NV followed by two hexadecimal digits
     if (!name.isEmpty()) {
         const int id = QStringView(chipset).mid(2, -1).toInt(nullptr, 16); // Strip the 'NV' from the id
 
         switch (id & 0xf0) {
         case 0x00:
         case 0x10:
             return NV10;
 
         case 0x20:
             return NV20;
 
         case 0x30:
             return NV30;
 
         case 0x40:
         case 0x60:
             return NV40;
 
         case 0x50:
         case 0x80:
         case 0x90:
         case 0xA0:
             return G80;
 
         default:
             return UnknownNVidia;
         }
     }
 
     if (chipset.contains(QLatin1String("GeForce2")) || chipset.contains(QLatin1String("GeForce 256"))) {
         return NV10;
     }
 
     if (chipset.contains(QLatin1String("GeForce3"))) {
         return NV20;
     }
 
     if (chipset.contains(QLatin1String("GeForce4"))) {
         if (chipset.contains(QLatin1String("MX 420"))
             || chipset.contains(QLatin1String("MX 440")) // including MX 440SE
             || chipset.contains(QLatin1String("MX 460"))
             || chipset.contains(QLatin1String("MX 4000"))
             || chipset.contains(QLatin1String("PCX 4300"))) {
             return NV10;
         }
 
         return NV20;
     }
 
     // GeForce 5,6,7,8,9
     name = extract(chipset, QStringLiteral("GeForce (FX |PCX |Go )?\\d{4}(M|\\b)")).trimmed();
     if (!name.isEmpty()) {
         if (!name[name.length() - 1].isDigit()) {
             name.chop(1);
         }
 
         const int id = QStringView(name).right(4).toInt();
         if (id < 6000) {
             return NV30;
         }
 
         if (id >= 6000 && id < 8000) {
             return NV40;
         }
 
         if (id >= 8000) {
             return G80;
         }
 
         return UnknownNVidia;
     }
 
     // GeForce 100/200/300/400/500
     name = extract(chipset, QStringLiteral("GeForce (G |GT |GTX |GTS )?\\d{3}(M|\\b)")).trimmed();
     if (!name.isEmpty()) {
         if (!name[name.length() - 1].isDigit()) {
             name.chop(1);
         }
 
         const int id = QStringView(name).right(3).toInt();
         if (id >= 100 && id < 600) {
             if (id >= 400) {
                 return GF100;
             }
 
             return G80;
         }
         return UnknownNVidia;
     }
 
     return UnknownNVidia;
 }
 static inline ChipClass detectNVidiaClass(const QByteArray &chipset)
 {
     return detectNVidiaClass(QString::fromLatin1(chipset));
 }
 
 static ChipClass detectIntelClass(const QByteArray &chipset)
 {
     // see mesa repository: src/mesa/drivers/dri/intel/intel_context.c
     // GL 1.3, DX8? SM ?
     if (chipset.contains("845G")
         || chipset.contains("830M")
         || chipset.contains("852GM/855GM")
         || chipset.contains("865G")) {
         return I8XX;
     }
 
     // GL 1.4, DX 9.0, SM 2.0
     if (chipset.contains("915G")
         || chipset.contains("E7221G")
         || chipset.contains("915GM")
         || chipset.contains("945G") // DX 9.0c
         || chipset.contains("945GM")
         || chipset.contains("945GME")
         || chipset.contains("Q33") // GL1.5
         || chipset.contains("Q35")
         || chipset.contains("G33")
         || chipset.contains("965Q") // GMA 3000, but apparently considered gen 4 by the driver
         || chipset.contains("946GZ") // GMA 3000, but apparently considered gen 4 by the driver
         || chipset.contains("IGD")) {
         return I915;
     }
 
     // GL 2.0, DX 9.0c, SM 3.0
     if (chipset.contains("965G")
         || chipset.contains("G45/G43") // SM 4.0
         || chipset.contains("965GM") // GL 2.1
         || chipset.contains("965GME/GLE")
         || chipset.contains("GM45")
         || chipset.contains("Q45/Q43")
         || chipset.contains("G41")
         || chipset.contains("B43")
         || chipset.contains("Ironlake")) {
         return I965;
     }
 
     // GL 3.1, CL 1.1, DX 10.1
     if (chipset.contains("Sandybridge") || chipset.contains("SNB GT")) {
         return SandyBridge;
     }
 
     // GL4.0, CL1.1, DX11, SM 5.0
     if (chipset.contains("Ivybridge") || chipset.contains("IVB GT")) {
         return IvyBridge;
     }
 
     // GL4.0, CL1.2, DX11.1, SM 5.0
     if (chipset.contains("Haswell") || chipset.contains("HSW GT")) {
         return Haswell;
     }
     if (chipset.contains("BYT")) {
         return BayTrail;
     }
     if (chipset.contains("CHV") || chipset.contains("BSW")) {
         return Cherryview;
     }
     if (chipset.contains("BDW GT")) {
         return Broadwell;
     }
     if (chipset.contains("SKL GT")) {
         return Skylake;
     }
     if (chipset.contains("APL")) {
         return ApolloLake;
     }
     if (chipset.contains("KBL GT")) {
         return KabyLake;
     }
     if (chipset.contains("WHL GT")) {
         return WhiskeyLake;
     }
     if (chipset.contains("CML GT")) {
         return CometLake;
     }
     if (chipset.contains("CNL GT")) {
         return CannonLake;
     }
     if (chipset.contains("CFL GT")) {
         return CoffeeLake;
     }
     if (chipset.contains("ICL GT")) {
         return IceLake;
     }
     if (chipset.contains("TGL GT")) {
         return TigerLake;
     }
 
     return UnknownIntel;
 }
 
 static ChipClass detectQualcommClass(const QByteArray &chipClass)
 {
     if (!chipClass.contains("Adreno")) {
         return UnknownChipClass;
     }
     const auto parts = chipClass.split(' ');
     if (parts.count() < 3) {
         return UnknownAdreno;
     }
     bool ok = false;
     const int value = parts.at(2).toInt(&ok);
     if (ok) {
         if (value >= 100 && value < 200) {
             return Adreno1XX;
         } else if (value >= 200 && value < 300) {
             return Adreno2XX;
         } else if (value >= 300 && value < 400) {
             return Adreno3XX;
         } else if (value >= 400 && value < 500) {
             return Adreno4XX;
         } else if (value >= 500 && value < 600) {
             return Adreno5XX;
         }
     }
     return UnknownAdreno;
 }
 
 static ChipClass detectPanfrostClass(const QByteArray &chipClass)
 {
 // Keep the list of supported Mali chipset up to date with https://docs.mesa3d.org/drivers/panfrost.html
     if (chipClass.contains("T720") || chipClass.contains("T760")) {
         return MaliT7XX;
     }
 
     if (chipClass.contains("T820") || chipClass.contains("T830") || chipClass.contains("T860") || chipClass.contains("T880")) {
         return MaliT8XX;
     }
 
     if (chipClass.contains("G31") || chipClass.contains("G51") || chipClass.contains("G52") || chipClass.contains("G57") || chipClass.contains("G72") || chipClass.contains("G76")) {
         return MaliGXX;
     }
 
     return UnknownPanfrost;
 }
 
 static ChipClass detectLimaClass(const QByteArray &chipClass)
 {
     if (chipClass.contains("400")) {
         return Mali400;
     } else if (chipClass.contains("450")) {
         return Mali450;
     } else if (chipClass.contains("470")) {
         return Mali470;
     }
 
     return UnknownLima;
 }
 
 static ChipClass detectVC4Class(const QByteArray &chipClass)
 {
     if (chipClass.contains("2.1")) {
         return VC4_2_1;
     }
 
     return UnknownVideoCore4;
 }
 
 static ChipClass detectV3DClass(const QByteArray &chipClass)
 {
     if (chipClass.contains("4.2")) {
         return V3D_4_2;
     }
 
     return UnknownVideoCore3D;
 }
 
 QString GLPlatform::versionToString(qint64 version)
 {
     return QString::fromLatin1(versionToString8(version));
 }
 QByteArray GLPlatform::versionToString8(qint64 version)
 {
     int major = (version >> 32);
     int minor = (version >> 16) & 0xffff;
     int patch = version & 0xffff;
 
     QByteArray string = QByteArray::number(major) + '.' + QByteArray::number(minor);
     if (patch != 0) {
         string += '.' + QByteArray::number(patch);
     }
 
     return string;
 }
 
 QString GLPlatform::driverToString(Driver driver)
 {
     return QString::fromLatin1(driverToString8(driver));
 }
 QByteArray GLPlatform::driverToString8(Driver driver)
 {
     switch (driver) {
     case Driver_R100:
         return QByteArrayLiteral("Radeon");
     case Driver_R200:
         return QByteArrayLiteral("R200");
     case Driver_R300C:
         return QByteArrayLiteral("R300C");
     case Driver_R300G:
         return QByteArrayLiteral("R300G");
     case Driver_R600C:
         return QByteArrayLiteral("R600C");
     case Driver_R600G:
         return QByteArrayLiteral("R600G");
     case Driver_RadeonSI:
         return QByteArrayLiteral("RadeonSI");
     case Driver_Nouveau:
         return QByteArrayLiteral("Nouveau");
     case Driver_Intel:
         return QByteArrayLiteral("Intel");
     case Driver_NVidia:
         return QByteArrayLiteral("NVIDIA");
     case Driver_Catalyst:
         return QByteArrayLiteral("Catalyst");
     case Driver_Swrast:
         return QByteArrayLiteral("Software rasterizer");
     case Driver_Softpipe:
         return QByteArrayLiteral("softpipe");
     case Driver_Llvmpipe:
         return QByteArrayLiteral("LLVMpipe");
     case Driver_VirtualBox:
         return QByteArrayLiteral("VirtualBox (Chromium)");
     case Driver_VMware:
         return QByteArrayLiteral("VMware (SVGA3D)");
     case Driver_Qualcomm:
         return QByteArrayLiteral("Qualcomm");
     case Driver_Virgl:
         return QByteArrayLiteral("Virgl (virtio-gpu, Qemu/KVM guest)");
     case Driver_Panfrost:
         return QByteArrayLiteral("Panfrost");
     case Driver_Lima:
         return QByteArrayLiteral("Mali (Lima)");
     case Driver_VC4:
         return QByteArrayLiteral("VideoCore IV");
     case Driver_V3D:
         return QByteArrayLiteral("VideoCore 3D");
 
     default:
         return QByteArrayLiteral("Unknown");
     }
 }
 
 QString GLPlatform::chipClassToString(ChipClass chipClass)
 {
     return QString::fromLatin1(chipClassToString8(chipClass));
 }
 QByteArray GLPlatform::chipClassToString8(ChipClass chipClass)
 {
     switch (chipClass) {
     case R100:
         return QByteArrayLiteral("R100");
     case R200:
         return QByteArrayLiteral("R200");
     case R300:
         return QByteArrayLiteral("R300");
     case R400:
         return QByteArrayLiteral("R400");
     case R500:
         return QByteArrayLiteral("R500");
     case R600:
         return QByteArrayLiteral("R600");
     case R700:
         return QByteArrayLiteral("R700");
     case Evergreen:
         return QByteArrayLiteral("EVERGREEN");
     case NorthernIslands:
         return QByteArrayLiteral("Northern Islands");
     case SouthernIslands:
         return QByteArrayLiteral("Southern Islands");
     case SeaIslands:
         return QByteArrayLiteral("Sea Islands");
     case VolcanicIslands:
         return QByteArrayLiteral("Volcanic Islands");
     case ArcticIslands:
         return QByteArrayLiteral("Arctic Islands");
     case Vega:
         return QByteArrayLiteral("Vega");
     case Navi:
         return QByteArrayLiteral("Navi");
 
     case NV10:
         return QByteArrayLiteral("NV10");
     case NV20:
         return QByteArrayLiteral("NV20");
     case NV30:
         return QByteArrayLiteral("NV30");
     case NV40:
         return QByteArrayLiteral("NV40/G70");
     case G80:
         return QByteArrayLiteral("G80/G90");
     case GF100:
         return QByteArrayLiteral("GF100");
 
     case I8XX:
         return QByteArrayLiteral("i830/i835");
     case I915:
         return QByteArrayLiteral("i915/i945");
     case I965:
         return QByteArrayLiteral("i965");
     case SandyBridge:
         return QByteArrayLiteral("SandyBridge");
     case IvyBridge:
         return QByteArrayLiteral("IvyBridge");
     case Haswell:
         return QByteArrayLiteral("Haswell");
     case BayTrail:
         return QByteArrayLiteral("Bay Trail");
     case Cherryview:
         return QByteArrayLiteral("Cherryview");
     case Broadwell:
         return QByteArrayLiteral("Broadwell");
     case ApolloLake:
         return QByteArrayLiteral("Apollo Lake");
     case Skylake:
         return QByteArrayLiteral("Skylake");
     case GeminiLake:
         return QByteArrayLiteral("Gemini Lake");
     case KabyLake:
         return QByteArrayLiteral("Kaby Lake");
     case CoffeeLake:
         return QByteArrayLiteral("Coffee Lake");
     case WhiskeyLake:
         return QByteArrayLiteral("Whiskey Lake");
     case CometLake:
         return QByteArrayLiteral("Comet Lake");
     case CannonLake:
         return QByteArrayLiteral("Cannon Lake");
     case IceLake:
         return QByteArrayLiteral("Ice Lake");
     case TigerLake:
         return QByteArrayLiteral("Tiger Lake");
 
     case Adreno1XX:
         return QByteArrayLiteral("Adreno 1xx series");
     case Adreno2XX:
         return QByteArrayLiteral("Adreno 2xx series");
     case Adreno3XX:
         return QByteArrayLiteral("Adreno 3xx series");
     case Adreno4XX:
         return QByteArrayLiteral("Adreno 4xx series");
     case Adreno5XX:
         return QByteArrayLiteral("Adreno 5xx series");
 
     case Mali400:
         return QByteArrayLiteral("Mali 400 series");
     case Mali450:
         return QByteArrayLiteral("Mali 450 series");
     case Mali470:
         return QByteArrayLiteral("Mali 470 series");
 
     case MaliT7XX:
         return QByteArrayLiteral("Mali T7xx series");
     case MaliT8XX:
         return QByteArrayLiteral("Mali T8xx series");
     case MaliGXX:
         return QByteArrayLiteral("Mali Gxx series");
 
     case VC4_2_1:
         return QByteArrayLiteral("VideoCore IV");
     case V3D_4_2:
         return QByteArrayLiteral("VideoCore 3D");
 
     default:
         return QByteArrayLiteral("Unknown");
     }
 }
 
 // -------
 
 GLPlatform::GLPlatform()
     : m_driver(Driver_Unknown)
     , m_chipClass(UnknownChipClass)
     , m_recommendedCompositor(QPainterCompositing)
     , m_glVersion(0)
     , m_glslVersion(0)
     , m_mesaVersion(0)
     , m_driverVersion(0)
     , m_galliumVersion(0)
     , m_serverVersion(0)
     , m_kernelVersion(0)
     , m_looseBinding(false)
     , m_supportsGLSL(false)
     , m_limitedGLSL(false)
     , m_textureNPOT(false)
     , m_limitedNPOT(false)
     , m_packInvert(false)
     , m_virtualMachine(false)
     , m_preferBufferSubData(false)
     , m_platformInterface(NoOpenGLPlatformInterface)
     , m_gles(false)
 {
 }
 
 GLPlatform::~GLPlatform()
 {
 }
 
 void GLPlatform::detect(OpenGLPlatformInterface platformInterface)
 {
     m_platformInterface = platformInterface;
 
     m_vendor = (const char *)glGetString(GL_VENDOR);
     m_renderer = (const char *)glGetString(GL_RENDERER);
     m_version = (const char *)glGetString(GL_VERSION);
 
     // Parse the OpenGL version
     const QList<QByteArray> versionTokens = m_version.split(' ');
     if (versionTokens.count() > 0) {
         const QByteArray version = QByteArray(m_version);
         m_glVersion = parseVersionString(version);
         if (platformInterface == EglPlatformInterface) {
             // only EGL can have OpenGLES, GLX is OpenGL only
             if (version.startsWith("OpenGL ES")) {
                 // from GLES 2: "Returns a version or release number of the form OpenGL<space>ES<space><version number><space><vendor-specific information>."
                 // from GLES 3: "Returns a version or release number." and "The version number uses one of these forms: major_number.minor_number major_number.minor_number.release_number"
                 m_gles = true;
             }
         }
     }
 
     if (!isGLES() && m_glVersion >= kVersionNumber(3, 0)) {
         int count;
         glGetIntegerv(GL_NUM_EXTENSIONS, &count);
 
         for (int i = 0; i < count; i++) {
             const char *name = (const char *)glGetStringi(GL_EXTENSIONS, i);
             m_extensions.insert(name);
         }
     } else {
         const QByteArray extensions = (const char *)glGetString(GL_EXTENSIONS);
         QList<QByteArray> extensionsList = extensions.split(' ');
         m_extensions = {extensionsList.constBegin(), extensionsList.constEnd()};
     }
 
     // Parse the Mesa version
     const int mesaIndex = versionTokens.indexOf("Mesa");
     if (mesaIndex != -1) {
         const QByteArray &version = versionTokens.at(mesaIndex + 1);
         m_mesaVersion = parseVersionString(version);
     }
 
     if (isGLES()) {
         m_supportsGLSL = true;
         m_textureNPOT = true;
     } else {
         m_supportsGLSL = (m_extensions.contains("GL_ARB_shader_objects")
                           && m_extensions.contains("GL_ARB_fragment_shader")
                           && m_extensions.contains("GL_ARB_vertex_shader"));
 
         m_textureNPOT = m_extensions.contains("GL_ARB_texture_non_power_of_two");
     }
 
     m_serverVersion = getXServerVersion();
     m_kernelVersion = getKernelVersion();
 
     m_glslVersion = 0;
     m_glsl_version.clear();
 
     if (m_supportsGLSL) {
         // Parse the GLSL version
         m_glsl_version = (const char *)glGetString(GL_SHADING_LANGUAGE_VERSION);
         m_glslVersion = parseVersionString(m_glsl_version);
     }
 
     m_chipset = QByteArrayLiteral("Unknown");
     m_preferBufferSubData = false;
     m_packInvert = m_extensions.contains("GL_MESA_pack_invert");
 
     // Mesa classic drivers
     // ====================================================
 
     // Radeon
     if (m_renderer.startsWith("Mesa DRI R")) {
         // Sample renderer string: Mesa DRI R600 (RV740 94B3) 20090101 x86/MMX/SSE2 TCL DRI2
         const QList<QByteArray> tokens = m_renderer.split(' ');
         const QByteArray &chipClass = tokens.at(2);
         m_chipset = tokens.at(3).mid(1, -1); // Strip the leading '('
 
         if (chipClass == "R100") {
             // Vendor: Tungsten Graphics, Inc.
             m_driver = Driver_R100;
 
         } else if (chipClass == "R200") {
             // Vendor: Tungsten Graphics, Inc.
             m_driver = Driver_R200;
 
         } else if (chipClass == "R300") {
             // Vendor: DRI R300 Project
             m_driver = Driver_R300C;
 
         } else if (chipClass == "R600") {
             // Vendor: Advanced Micro Devices, Inc.
             m_driver = Driver_R600C;
         }
 
         m_chipClass = detectRadeonClass(m_chipset);
     }
 
     // Intel
     else if (m_renderer.contains("Intel")) {
         // Vendor: Tungsten Graphics, Inc.
         // Sample renderer string: Mesa DRI Mobile Intel® GM45 Express Chipset GEM 20100328 2010Q1
 
         QByteArray chipset;
         if (m_renderer.startsWith("Intel(R) Integrated Graphics Device")) {
             chipset = "IGD";
         } else {
             chipset = m_renderer;
         }
 
         m_driver = Driver_Intel;
         m_chipClass = detectIntelClass(chipset);
     }
 
     // Properietary drivers
     // ====================================================
     else if (m_vendor == "ATI Technologies Inc.") {
         m_chipClass = detectRadeonClass(m_renderer);
         m_driver = Driver_Catalyst;
 
         if (versionTokens.count() > 1 && versionTokens.at(2)[0] == '(') {
             m_driverVersion = parseVersionString(versionTokens.at(1));
         } else if (versionTokens.count() > 0) {
             m_driverVersion = parseVersionString(versionTokens.at(0));
         } else {
             m_driverVersion = 0;
         }
     }
 
     else if (m_vendor == "NVIDIA Corporation") {
         m_chipClass = detectNVidiaClass(m_renderer);
         m_driver = Driver_NVidia;
 
         int index = versionTokens.indexOf("NVIDIA");
         if (versionTokens.count() > index) {
             m_driverVersion = parseVersionString(versionTokens.at(index + 1));
         } else {
             m_driverVersion = 0;
         }
     }
 
     else if (m_vendor == "Qualcomm") {
         m_driver = Driver_Qualcomm;
         m_chipClass = detectQualcommClass(m_renderer);
     }
 
     else if (m_renderer.contains("Panfrost")) {
         m_driver = Driver_Panfrost;
         m_chipClass = detectPanfrostClass(m_renderer);
     }
 
     else if (m_renderer.contains("Mali")) {
         m_driver = Driver_Lima;
         m_chipClass = detectLimaClass(m_renderer);
     }
 
     else if (m_renderer.startsWith("VC4 ")) {
         m_driver = Driver_VC4;
         m_chipClass = detectVC4Class(m_renderer);
     }
 
     else if(m_renderer.startsWith("V3D ")) {
         m_driver = Driver_V3D;
         m_chipClass = detectV3DClass(m_renderer);
     }
 
     else if (m_renderer == "Software Rasterizer") {
         m_driver = Driver_Swrast;
     }
 
     // Virtual Hardware
     // ====================================================
     else if (m_vendor == "Humper" && m_renderer == "Chromium") {
         // Virtual Box
         m_driver = Driver_VirtualBox;
 
         const int index = versionTokens.indexOf("Chromium");
         if (versionTokens.count() > index) {
             m_driverVersion = parseVersionString(versionTokens.at(index + 1));
         } else {
             m_driverVersion = 0;
         }
     }
 
     // Gallium drivers
     // ====================================================
     else {
         const QList<QByteArray> tokens = m_renderer.split(' ');
         if (m_renderer.contains("Gallium")) {
             // Sample renderer string: Gallium 0.4 on AMD RV740
             m_galliumVersion = parseVersionString(tokens.at(1));
             m_chipset = (tokens.at(3) == "AMD" || tokens.at(3) == "ATI") ? tokens.at(4) : tokens.at(3);
         } else {
             // The renderer string does not contain "Gallium" anymore.
             m_chipset = tokens.at(0);
             // We don't know the actual version anymore, but it's at least 0.4.
             m_galliumVersion = kVersionNumber(0, 4, 0);
         }
 
         // R300G
         if (m_vendor == QByteArrayLiteral("X.Org R300 Project")) {
             m_chipClass = detectRadeonClass(m_chipset);
             m_driver = Driver_R300G;
         }
 
         // R600G
         else if (m_vendor == "X.Org" && (m_renderer.contains("R6") || m_renderer.contains("R7") || m_renderer.contains("RV6") || m_renderer.contains("RV7") || m_renderer.contains("RS780") || m_renderer.contains("RS880") || m_renderer.contains("CEDAR") || m_renderer.contains("REDWOOD") || m_renderer.contains("JUNIPER") || m_renderer.contains("CYPRESS") || m_renderer.contains("HEMLOCK") || m_renderer.contains("PALM") || m_renderer.contains("EVERGREEN") || m_renderer.contains("SUMO") || m_renderer.contains("SUMO2") || m_renderer.contains("BARTS") || m_renderer.contains("TURKS") || m_renderer.contains("CAICOS") || m_renderer.contains("CAYMAN"))) {
             m_chipClass = detectRadeonClass(m_chipset);
             m_driver = Driver_R600G;
         }
 
         // RadeonSI
         else if ((m_vendor == "X.Org" || m_vendor == "AMD") && (m_renderer.contains("TAHITI") || m_renderer.contains("PITCAIRN") || m_renderer.contains("VERDE") || m_renderer.contains("OLAND") || m_renderer.contains("HAINAN") || m_renderer.contains("BONAIRE") || m_renderer.contains("KAVERI") || m_renderer.contains("KABINI") || m_renderer.contains("HAWAII") || m_renderer.contains("MULLINS") || m_renderer.contains("TOPAZ") || m_renderer.contains("TONGA") || m_renderer.contains("FIJI") || m_renderer.contains("CARRIZO") || m_renderer.contains("STONEY") || m_renderer.contains("POLARIS10") || m_renderer.contains("POLARIS11") || m_renderer.contains("POLARIS12") || m_renderer.contains("VEGAM") || m_renderer.contains("VEGA10") || m_renderer.contains("VEGA12") || m_renderer.contains("VEGA20") || m_renderer.contains("RAVEN") || m_renderer.contains("RAVEN2") || m_renderer.contains("RENOIR") || m_renderer.contains("ARCTURUS") || m_renderer.contains("NAVI10") || m_renderer.contains("NAVI12") || m_renderer.contains("NAVI14"))) {
             m_chipClass = detectRadeonClass(m_renderer);
             m_driver = Driver_RadeonSI;
         }
 
         // Nouveau
         else if (m_vendor == "nouveau") {
             m_chipClass = detectNVidiaClass(m_chipset);
             m_driver = Driver_Nouveau;
         }
 
         // softpipe
         else if (m_chipset == "softpipe") {
             m_driver = Driver_Softpipe;
         }
 
         // llvmpipe
         else if (m_chipset == "llvmpipe") {
             m_driver = Driver_Llvmpipe;
         }
 
         // SVGA3D
         else if (m_vendor == "VMware, Inc." && m_chipset.contains("SVGA3D")) {
             m_driver = Driver_VMware;
         }
 
         // virgl
         else if (m_renderer == "virgl") {
             m_driver = Driver_Virgl;
         }
     }
 
     // Driver/GPU specific features
     // ====================================================
     if (isRadeon()) {
         // R200 technically has a programmable pipeline, but since it's SM 1.4,
         // it's too limited to to be of any practical value to us.
         if (m_chipClass < R300) {
             m_supportsGLSL = false;
         }
 
         m_limitedGLSL = false;
         m_limitedNPOT = false;
 
         if (m_chipClass < R600) {
             if (driver() == Driver_Catalyst) {
                 m_textureNPOT = m_limitedNPOT = false; // Software fallback
             } else if (driver() == Driver_R300G) {
                 m_limitedNPOT = m_textureNPOT;
             }
 
             m_limitedGLSL = m_supportsGLSL;
         }
 
         if (m_chipClass < R300) {
             // fallback to NoCompositing for R100 and R200
             m_recommendedCompositor = NoCompositing;
         } else if (m_chipClass < R600) {
             // NoCompositing due to NPOT limitations not supported by KWin's shaders
             m_recommendedCompositor = NoCompositing;
         } else {
             m_recommendedCompositor = OpenGLCompositing;
         }
 
         if (driver() == Driver_R600G || (driver() == Driver_R600C && m_renderer.contains("DRI2"))) {
             m_looseBinding = true;
         }
     }
 
     if (isNvidia()) {
         if (m_driver == Driver_NVidia && m_chipClass < NV40) {
             m_supportsGLSL = false; // High likelihood of software emulation
         }
 
         if (m_driver == Driver_NVidia) {
             m_looseBinding = true;
             m_preferBufferSubData = true;
         }
 
         if (m_chipClass < NV40) {
             m_recommendedCompositor = NoCompositing;
         } else {
             m_recommendedCompositor = OpenGLCompositing;
         }
 
         m_limitedNPOT = m_textureNPOT && m_chipClass < NV40;
         m_limitedGLSL = m_supportsGLSL && m_chipClass < G80;
     }
 
     if (isIntel()) {
         if (m_chipClass < I915) {
             m_supportsGLSL = false;
         }
 
         m_limitedGLSL = m_supportsGLSL && m_chipClass < I965;
         // see https://bugs.freedesktop.org/show_bug.cgi?id=80349#c1
         m_looseBinding = false;
 
         if (m_chipClass < I915) {
             m_recommendedCompositor = NoCompositing;
         } else {
             m_recommendedCompositor = OpenGLCompositing;
         }
     }
 
     if (isPanfrost()) {
         m_recommendedCompositor = OpenGLCompositing;
     }
 
     if (isLima()) {
         m_recommendedCompositor = OpenGLCompositing;
         m_supportsGLSL = true;
     }
 
     if (isVideoCore4()) {
         // OpenGL works, but is much slower than QPainter
         m_recommendedCompositor = QPainterCompositing;
     }
 
     if (isVideoCore3D()) {
         // OpenGL works, but is much slower than QPainter
         m_recommendedCompositor = QPainterCompositing;
     }
 
     if (isMesaDriver() && platformInterface == EglPlatformInterface) {
         // According to the reference implementation in
         // mesa/demos/src/egl/opengles1/texture_from_pixmap
         // the mesa egl implementation does not require a strict binding (so far).
         m_looseBinding = true;
     }
 
     if (isSoftwareEmulation()) {
         if (m_driver < Driver_Llvmpipe) {
             // we recommend QPainter
             m_recommendedCompositor = QPainterCompositing;
             // Software emulation does not provide GLSL
             m_limitedGLSL = m_supportsGLSL = false;
         } else {
             // llvmpipe does support GLSL
             m_recommendedCompositor = OpenGLCompositing;
             m_limitedGLSL = false;
             m_supportsGLSL = true;
         }
     }
 
     if (m_driver == Driver_Qualcomm) {
         if (m_chipClass == Adreno1XX) {
             m_recommendedCompositor = NoCompositing;
         } else {
             // all other drivers support at least GLES 2
             m_recommendedCompositor = OpenGLCompositing;
         }
     }
 
     if (m_chipClass == UnknownChipClass && m_driver == Driver_Unknown) {
         // we don't know the hardware. Let's be optimistic and assume OpenGL compatible hardware
         m_recommendedCompositor = OpenGLCompositing;
         m_supportsGLSL = true;
     }
 
     if (isVirtualBox()) {
         m_virtualMachine = true;
         m_recommendedCompositor = OpenGLCompositing;
     }
 
     if (isVMware()) {
         m_virtualMachine = true;
         m_recommendedCompositor = OpenGLCompositing;
     }
 
     if (m_driver == Driver_Virgl) {
         m_virtualMachine = true;
         m_recommendedCompositor = OpenGLCompositing;
     }
 
     // and force back to shader supported on gles, we wouldn't have got a context if not supported
     if (isGLES()) {
         m_supportsGLSL = true;
         m_limitedGLSL = false;
     }
 }
 
 static void print(const QByteArray &label, const QByteArray &setting)
 {
     qInfo("%-40s%s", label.data(), setting.data());
 }
 
 void GLPlatform::printResults() const
 {
     print(QByteArrayLiteral("OpenGL vendor string:"), m_vendor);
     print(QByteArrayLiteral("OpenGL renderer string:"), m_renderer);
     print(QByteArrayLiteral("OpenGL version string:"), m_version);
 
     if (m_supportsGLSL) {
         print(QByteArrayLiteral("OpenGL shading language version string:"), m_glsl_version);
     }
 
     print(QByteArrayLiteral("Driver:"), driverToString8(m_driver));
     if (!isMesaDriver()) {
         print(QByteArrayLiteral("Driver version:"), versionToString8(m_driverVersion));
     }
 
     print(QByteArrayLiteral("GPU class:"), chipClassToString8(m_chipClass));
 
     print(QByteArrayLiteral("OpenGL version:"), versionToString8(m_glVersion));
 
     if (m_supportsGLSL) {
         print(QByteArrayLiteral("GLSL version:"), versionToString8(m_glslVersion));
     }
 
     if (isMesaDriver()) {
         print(QByteArrayLiteral("Mesa version:"), versionToString8(mesaVersion()));
     }
     // if (galliumVersion() > 0)
     //     print("Gallium version:", versionToString(m_galliumVersion));
     if (serverVersion() > 0) {
         print(QByteArrayLiteral("X server version:"), versionToString8(m_serverVersion));
     }
     if (kernelVersion() > 0) {
         print(QByteArrayLiteral("Linux kernel version:"), versionToString8(m_kernelVersion));
     }
 
     print(QByteArrayLiteral("Requires strict binding:"), !m_looseBinding ? QByteArrayLiteral("yes") : QByteArrayLiteral("no"));
     print(QByteArrayLiteral("GLSL shaders:"), m_supportsGLSL ? (m_limitedGLSL ? QByteArrayLiteral("limited") : QByteArrayLiteral("yes")) : QByteArrayLiteral("no"));
     print(QByteArrayLiteral("Texture NPOT support:"), m_textureNPOT ? (m_limitedNPOT ? QByteArrayLiteral("limited") : QByteArrayLiteral("yes")) : QByteArrayLiteral("no"));
     print(QByteArrayLiteral("Virtual Machine:"), m_virtualMachine ? QByteArrayLiteral("yes") : QByteArrayLiteral("no"));
 }
 
 bool GLPlatform::supports(GLFeature feature) const
 {
     switch (feature) {
     case LooseBinding:
         return m_looseBinding;
 
     case GLSL:
         return m_supportsGLSL;
 
     case LimitedGLSL:
         return m_limitedGLSL;
 
     case TextureNPOT:
         return m_textureNPOT;
 
     case LimitedNPOT:
         return m_limitedNPOT;
 
     case PackInvert:
         return m_packInvert;
 
     default:
         return false;
     }
 }
 
 qint64 GLPlatform::glVersion() const
 {
     return m_glVersion;
 }
 
 qint64 GLPlatform::glslVersion() const
 {
     return m_glslVersion;
 }
 
 qint64 GLPlatform::mesaVersion() const
 {
     return m_mesaVersion;
 }
 
 qint64 GLPlatform::galliumVersion() const
 {
     return m_galliumVersion;
 }
 
 qint64 GLPlatform::serverVersion() const
 {
     return m_serverVersion;
 }
 
 qint64 GLPlatform::kernelVersion() const
 {
     return m_kernelVersion;
 }
 
 qint64 GLPlatform::driverVersion() const
 {
     if (isMesaDriver()) {
         return mesaVersion();
     }
 
     return m_driverVersion;
 }
 
 Driver GLPlatform::driver() const
 {
     return m_driver;
 }
 
 ChipClass GLPlatform::chipClass() const
 {
     return m_chipClass;
 }
 
 bool GLPlatform::isMesaDriver() const
 {
     return mesaVersion() > 0;
 }
 
 bool GLPlatform::isGalliumDriver() const
 {
     return galliumVersion() > 0;
 }
 
 bool GLPlatform::isRadeon() const
 {
     return m_chipClass >= R100 && m_chipClass <= UnknownRadeon;
 }
 
 bool GLPlatform::isNvidia() const
 {
     return m_chipClass >= NV10 && m_chipClass <= UnknownNVidia;
 }
 
 bool GLPlatform::isIntel() const
 {
     return m_chipClass >= I8XX && m_chipClass <= UnknownIntel;
 }
 
 bool GLPlatform::isVirtualBox() const
 {
     return m_driver == Driver_VirtualBox;
 }
 
 bool GLPlatform::isVMware() const
 {
     return m_driver == Driver_VMware;
 }
 
 bool GLPlatform::isVirgl() const
 {
     return m_driver == Driver_Virgl;
 }
 
 bool GLPlatform::isSoftwareEmulation() const
 {
     return m_driver == Driver_Softpipe || m_driver == Driver_Swrast || m_driver == Driver_Llvmpipe;
 }
 
 bool GLPlatform::isAdreno() const
 {
     return m_chipClass >= Adreno1XX && m_chipClass <= UnknownAdreno;
 }
 
 bool GLPlatform::isPanfrost() const
 {
     return m_chipClass >= MaliT7XX && m_chipClass <= UnknownPanfrost;
 }
 
 bool GLPlatform::isLima() const
 {
     return m_chipClass >= Mali400 && m_chipClass <= UnknownLima;
 }
 
 bool GLPlatform::isVideoCore4() const
 {
     return m_chipClass >= VC4_2_1 && m_chipClass <= UnknownVideoCore4;
 }
 
 bool GLPlatform::isVideoCore3D() const
 {
     return m_chipClass >= V3D_4_2 && m_chipClass <= UnknownVideoCore3D;
 }
 
 const QByteArray &GLPlatform::glRendererString() const
 {
     return m_renderer;
 }
 
 const QByteArray &GLPlatform::glVendorString() const
 {
     return m_vendor;
 }
 
 const QByteArray &GLPlatform::glVersionString() const
 {
     return m_version;
 }
 
 const QByteArray &GLPlatform::glShadingLanguageVersionString() const
 {
     return m_glsl_version;
 }
 
 bool GLPlatform::isLooseBinding() const
 {
     return m_looseBinding;
 }
 
 bool GLPlatform::isVirtualMachine() const
 {
     return m_virtualMachine;
 }
 
 CompositingType GLPlatform::recommendedCompositor() const
 {
     return m_recommendedCompositor;
 }
 
 bool GLPlatform::preferBufferSubData() const
 {
     return m_preferBufferSubData;
 }
 
 OpenGLPlatformInterface GLPlatform::platformInterface() const
 {
     return m_platformInterface;
 }
 
 bool GLPlatform::isGLES() const
 {
     return m_gles;
 }
 
 void GLPlatform::cleanup()
 {
     s_platform.reset();
 }
 
 } // namespace KWin