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03badec5d7
We need the ability to parse the GL version irrespective of GL extension handling, so pull it out into its own class. BUG=dawn:580 Change-Id: I620267146159ba8e4fa8cba5f6ebff57e981add0 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/33540 Reviewed-by: Austin Eng <enga@chromium.org> Commit-Queue: Stephen White <senorblanco@chromium.org>
77 lines
2.8 KiB
C++
77 lines
2.8 KiB
C++
// Copyright 2020 The Dawn Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "dawn_native/opengl/OpenGLVersion.h"
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#include <cctype>
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#include <tuple>
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namespace dawn_native { namespace opengl {
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MaybeError OpenGLVersion::Initialize(GetProcAddress getProc) {
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PFNGLGETSTRINGPROC getString = reinterpret_cast<PFNGLGETSTRINGPROC>(getProc("glGetString"));
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if (getString == nullptr) {
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return DAWN_INTERNAL_ERROR("Couldn't load glGetString");
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}
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std::string version = reinterpret_cast<const char*>(getString(GL_VERSION));
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if (version.find("OpenGL ES") != std::string::npos) {
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// ES spec states that the GL_VERSION string will be in the following format:
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// "OpenGL ES N.M vendor-specific information"
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mStandard = Standard::ES;
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mMajorVersion = version[10] - '0';
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mMinorVersion = version[12] - '0';
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// The minor version shouldn't get to two digits.
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ASSERT(version.size() <= 13 || !isdigit(version[13]));
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} else {
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// OpenGL spec states the GL_VERSION string will be in the following format:
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// <version number><space><vendor-specific information>
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// The version number is either of the form major number.minor number or major
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// number.minor number.release number, where the numbers all have one or more
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// digits
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mStandard = Standard::Desktop;
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mMajorVersion = version[0] - '0';
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mMinorVersion = version[2] - '0';
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// The minor version shouldn't get to two digits.
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ASSERT(version.size() <= 3 || !isdigit(version[3]));
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}
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return {};
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}
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bool OpenGLVersion::IsDesktop() const {
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return mStandard == Standard::Desktop;
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}
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bool OpenGLVersion::IsES() const {
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return mStandard == Standard::ES;
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}
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uint32_t OpenGLVersion::GetMajor() const {
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return mMajorVersion;
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}
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uint32_t OpenGLVersion::GetMinor() const {
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return mMinorVersion;
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}
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bool OpenGLVersion::IsAtLeast(uint32_t majorVersion, uint32_t minorVersion) const {
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return std::tie(mMajorVersion, mMinorVersion) >= std::tie(majorVersion, minorVersion);
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}
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}} // namespace dawn_native::opengl
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