| // 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 |