blob: ccfefecbbf2a1b8866349a37c20e68de2ec2db16 [file] [log] [blame] [edit]
// Copyright 2020 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "dawn/native/opengl/OpenGLVersion.h"
#include <cctype>
#include <string>
#include <tuple>
namespace dawn::native::opengl {
MaybeError OpenGLVersion::Initialize(GLGetProcProc getProc) {
PFNGLGETSTRINGPROC getString = reinterpret_cast<PFNGLGETSTRINGPROC>(getProc("glGetString"));
if (getString == nullptr) {
return DAWN_INTERNAL_ERROR("Couldn't load glGetString");
}
const char* version = reinterpret_cast<const char*>(getString(GL_VERSION));
if (strstr(version, "OpenGL ES") != nullptr) {
// ES spec states that the GL_VERSION string will be in the following format:
// "OpenGL ES N.M vendor-specific information"
mStandard = Standard::ES;
mMajorVersion = version[10] - '0';
mMinorVersion = version[12] - '0';
// The minor version shouldn't get to two digits.
DAWN_ASSERT(strlen(version) <= 13 || !isdigit(version[13]));
} else {
// OpenGL spec states the GL_VERSION string will be in the following format:
// <version number><space><vendor-specific information>
// The version number is either of the form major number.minor number or major
// number.minor number.release number, where the numbers all have one or more
// digits
mStandard = Standard::Desktop;
mMajorVersion = version[0] - '0';
mMinorVersion = version[2] - '0';
// The minor version shouldn't get to two digits.
DAWN_ASSERT(strlen(version) <= 3 || !isdigit(version[3]));
}
return {};
}
bool OpenGLVersion::IsDesktop() const {
return mStandard == Standard::Desktop;
}
bool OpenGLVersion::IsES() const {
return mStandard == Standard::ES;
}
OpenGLVersion::Standard OpenGLVersion::GetStandard() const {
return mStandard;
}
uint32_t OpenGLVersion::GetMajor() const {
return mMajorVersion;
}
uint32_t OpenGLVersion::GetMinor() const {
return mMinorVersion;
}
bool OpenGLVersion::IsAtLeast(uint32_t majorVersion, uint32_t minorVersion) const {
return std::tie(mMajorVersion, mMinorVersion) >= std::tie(majorVersion, minorVersion);
}
} // namespace dawn::native::opengl