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OpenGLUtil.cpp
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OpenGLUtil.cpp
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/*
* Copyright 2021 Arx Libertatis Team (see the AUTHORS file)
*
* This file is part of Arx Libertatis.
*
* Arx Libertatis is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Arx Libertatis is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Arx Libertatis. If not, see <http://www.gnu.org/licenses/>.
*/
#include "graphics/opengl/OpenGLUtil.h"
#include <cstring>
#include <boost/algorithm/string/predicate.hpp>
#include <boost/foreach.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/tokenizer.hpp>
#include "core/Config.h"
#include "io/log/Logger.h"
#include "platform/ProgramOptions.h"
static std::string g_glExtensionOverride;
static void setGlOverride(const std::string & string) {
g_glExtensionOverride = string;
}
ARX_PROGRAM_OPTION_ARG("override-gl", NULL, "Override OpenGL version and extensions", &setGlOverride, "OVERRIDES")
OpenGLInfo::OpenGLInfo()
: m_versionString("")
, m_vendor("")
, m_renderer("")
, m_isES(false)
, m_version(0)
, m_versionOverride(std::numeric_limits<s32>::max())
{
#if ARX_HAVE_EPOXY
m_isES = !epoxy_is_desktop_gl();
m_version = epoxy_gl_version();
#elif ARX_HAVE_GLEW
if(glewIsSupported("GL_VERSION_4_4")) {
m_version = 44;
} else if(glewIsSupported("GL_VERSION_4_3")) {
m_version = 43;
} else if(glewIsSupported("GL_VERSION_4_2")) {
m_version = 42;
} else if(glewIsSupported("GL_VERSION_4_1")) {
m_version = 41;
} else if(glewIsSupported("GL_VERSION_4_0")) {
m_version = 40;
} else if(glewIsSupported("GL_VERSION_3_2")) {
m_version = 32;
} else if(glewIsSupported("GL_VERSION_3_1")) {
m_version = 31;
} else if(glewIsSupported("GL_VERSION_3_0")) {
m_version = 30;
} else if(glewIsSupported("GL_VERSION_2_1")) {
m_version = 21;
} else if(glewIsSupported("GL_VERSION_2_0")) {
m_version = 20;
} else if(glewIsSupported("GL_VERSION_1_5")) {
m_version = 15;
} else if(glewIsSupported("GL_VERSION_1_4")) {
m_version = 14;
}
#endif
m_versionString = reinterpret_cast<const char *>(glGetString(GL_VERSION));
const char * prefix = "OpenGL ";
if(boost::starts_with(m_versionString, prefix)) {
m_versionString += std::strlen(prefix);
}
m_vendor = reinterpret_cast<const char *>(glGetString(GL_VENDOR));
m_renderer = reinterpret_cast<const char *>(glGetString(GL_RENDERER));
// Some older OpenGL implementations incorrectly claim support for GL_ARB_texture_non_power_of_two
if(!isES() && !is(3, 0)) {
GLint max = 0;
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max);
if(max < 8192) {
m_extensionOverrides.push_back("-GL_ARB_texture_non_power_of_two");
}
}
// Some versions of Intel's ig7icd32.dll/ig7icd64.dll Windows drivers crash when using per-sample shading
// See bug https://arx.vg/1152 and duplicates (2018-2021)
// Confirmed by users in http://arx.vg/1250 and https://arx.vg/1532 to be triggered by Crisp Alpha Cutout AA
// with device "Intel(R) HD Graphics 4000" and versions "4.0.0 - Build 10.18.10.4276" and …".4252".
// Other build numbers in similar-looking but unconfirmed crashes are 4358, 4653, 4885, 5059, 5069, 5129
// and 5146 and for some of them the renderer does not have the " 4000" suffix.
// There are also undiagnosed crash reports with device "Intel(R) HD Graphics 2500" and build number 5161.
//
// Note that there are also (other) crashes (most on shutdown) with matching driver versions seen in
// http://arx.vg/645 and duplicates, before Crisp Alpha Cutout AA was added so other functionality may
// also be buggy with this driver.
#if ARX_PLATFORM == ARX_PLATFORM_WIN32
if(!isES() && boost::equals(vendor(), "Intel")
&& boost::starts_with(renderer(), "Intel(R) HD Graphics")
&& boost::contains(versionString(), "Build 10.18.10.")) {
m_extensionOverrides.push_back("-GL_ARB_sample_shading");
}
#endif
parseOverrideConfig(config.video.extensionOverride);
parseOverrideConfig(g_glExtensionOverride);
}
void OpenGLInfo::parseOverrideConfig(const std::string & string) {
boost::char_separator<char> separator(" \t\r\n,;:");
boost::tokenizer< boost::char_separator<char> > tokens(string, separator);
bool first = true;
BOOST_FOREACH(const std::string & token, tokens) {
if(boost::starts_with(token, "+GL_") || boost::starts_with(token, "-GL_")) {
m_extensionOverrides.push_back(token);
first = false;
} else {
try {
size_t offset = boost::starts_with(token, "GL") ? 2 : 0;
size_t dot = token.find('.', offset);
if(token == "+*" || token == "+") {
m_versionOverride = std::numeric_limits<s32>::max();
} else if(token == "-*" || token == "-") {
m_versionOverride = m_version;
} else if(dot != std::string::npos) {
u32 major = boost::lexical_cast<u32>(token.substr(offset, dot - offset));
u32 minor = boost::lexical_cast<u32>(token.substr(dot + 1));
if(minor > 10 || major > std::numeric_limits<u32>::max() / 10) {
throw std::exception();
}
m_versionOverride = major * 10 + minor;
} else if(token.length() - offset > 1) {
m_versionOverride = boost::lexical_cast<u32>(token.substr(offset));
} else {
m_versionOverride = boost::lexical_cast<u32>(token.substr(offset)) * 10;
}
if(!first) {
LogWarning << "Ignoring OpenGL feature overrides before '" << token << "'";
}
m_extensionOverrides.clear();
first = false;
} catch(...) {
LogWarning << "Invalid OpenGL feature override '" << token << "'";
}
}
}
}
bool OpenGLInfo::has(const char * extension, u32 version) const {
if(m_version < version) {
#if ARX_HAVE_EPOXY
bool supported = epoxy_has_gl_extension(extension);
#elif ARX_HAVE_GLEW
bool supported = glewIsSupported(extension);
#endif
if(!supported) {
return false;
}
}
BOOST_REVERSE_FOREACH(const std::string & override, m_extensionOverrides) {
arx_assert(!override.empty());
if(override.compare(1, override.size() - 1, extension) == 0) {
if(override[0] == '+') {
return true;
} else {
LogInfo << "Ignoring OpenGL extension " << extension;
return false;
}
}
}
if(m_versionOverride >= version) {
return true;
} else {
LogInfo << "Ignoring OpenGL extension " << extension;
return false;
}
}