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https://github.com/encounter/dawn-cmake.git
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a0afd31585
The effect to the user is the same, the Dawn device gets lost. However we need to make the difference internally because when the backend device is lost we can clean up immediately. On the contrary on internal errors, the backend device is still alive and processing commands so we need to gracefully shut it down. Bug: dawn:269 Change-Id: Ie13b33a4f9ac2e1f5f98b3723d83cf1c6205c988 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/17965 Commit-Queue: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Austin Eng <enga@chromium.org>
88 lines
3.5 KiB
C++
88 lines
3.5 KiB
C++
// Copyright 2019 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/OpenGLFunctions.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 OpenGLFunctions::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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DAWN_TRY(LoadOpenGLESProcs(getProc, mMajorVersion, mMinorVersion));
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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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DAWN_TRY(LoadDesktopGLProcs(getProc, mMajorVersion, mMinorVersion));
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}
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InitializeSupportedGLExtensions();
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return {};
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}
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void OpenGLFunctions::InitializeSupportedGLExtensions() {
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int32_t numExtensions;
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GetIntegerv(GL_NUM_EXTENSIONS, &numExtensions);
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for (int32_t i = 0; i < numExtensions; ++i) {
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const char* extensionName = reinterpret_cast<const char*>(GetStringi(GL_EXTENSIONS, i));
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mSupportedGLExtensionsSet.insert(extensionName);
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}
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}
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bool OpenGLFunctions::IsGLExtensionSupported(const char* extension) const {
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ASSERT(extension != nullptr);
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return mSupportedGLExtensionsSet.count(extension) != 0;
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}
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bool OpenGLFunctions::IsAtLeastGL(uint32_t majorVersion, uint32_t minorVersion) const {
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return mStandard == Standard::Desktop &&
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std::tie(mMajorVersion, mMinorVersion) >= std::tie(majorVersion, minorVersion);
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}
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bool OpenGLFunctions::IsAtLeastGLES(uint32_t majorVersion, uint32_t minorVersion) const {
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return mStandard == Standard::ES &&
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std::tie(mMajorVersion, mMinorVersion) >= std::tie(majorVersion, minorVersion);
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}
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}} // namespace dawn_native::opengl
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