| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "ui/gl/gl_version_info.h" |
| |
| #include "base/stl_util.h" |
| #include "base/strings/string_split.h" |
| #include "base/strings/string_util.h" |
| #include "base/version.h" |
| |
| namespace { |
| |
| bool DesktopCoreCommonCheck( |
| bool is_es, unsigned major_version, unsigned minor_version) { |
| return (!is_es && |
| ((major_version == 3 && minor_version >= 2) || |
| major_version > 3)); |
| } |
| |
| } // namespace |
| |
| namespace gl { |
| |
| GLVersionInfo::GLVersionInfo(const char* version_str, |
| const char* renderer_str, |
| const gfx::ExtensionSet& extensions) |
| : is_es(false), |
| is_angle(false), |
| is_d3d(false), |
| is_mesa(false), |
| is_swiftshader(false), |
| major_version(0), |
| minor_version(0), |
| is_es2(false), |
| is_es3(false), |
| is_desktop_core_profile(false), |
| is_es3_capable(false) { |
| Initialize(version_str, renderer_str, extensions); |
| } |
| |
| void GLVersionInfo::Initialize(const char* version_str, |
| const char* renderer_str, |
| const gfx::ExtensionSet& extensions) { |
| if (version_str) |
| ParseVersionString(version_str); |
| if (renderer_str) { |
| is_angle = base::StartsWith(renderer_str, "ANGLE", |
| base::CompareCase::SENSITIVE); |
| is_mesa = base::StartsWith(renderer_str, "Mesa", |
| base::CompareCase::SENSITIVE); |
| is_swiftshader = base::StartsWith(renderer_str, "Google SwiftShader", |
| base::CompareCase::SENSITIVE); |
| |
| // An ANGLE renderer string contains "Direct3D9", "Direct3DEx", or |
| // "Direct3D11" on D3D backends. |
| std::string renderer_string = std::string(renderer_str); |
| is_d3d = renderer_string.find("Direct3D") != std::string::npos; |
| // (is_d3d should only be possible if is_angle is true.) |
| DCHECK(!is_d3d || is_angle); |
| } |
| is_desktop_core_profile = |
| DesktopCoreCommonCheck(is_es, major_version, minor_version) && |
| !gfx::HasExtension(extensions, "GL_ARB_compatibility"); |
| is_es3_capable = IsES3Capable(extensions); |
| } |
| |
| void GLVersionInfo::ParseVersionString(const char* version_str) { |
| // Make sure the outputs are always initialized. |
| major_version = 0; |
| minor_version = 0; |
| is_es = false; |
| is_es2 = false; |
| is_es3 = false; |
| if (!version_str) |
| return; |
| base::StringPiece lstr(version_str); |
| constexpr base::StringPiece kESPrefix = "OpenGL ES "; |
| if (base::StartsWith(lstr, kESPrefix, base::CompareCase::SENSITIVE)) { |
| is_es = true; |
| lstr.remove_prefix(kESPrefix.size()); |
| } |
| std::vector<base::StringPiece> pieces = base::SplitStringPiece( |
| lstr, " -()@", base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY); |
| if (pieces.size() == 0) { |
| // This should never happen, but let's just tolerant bad driver behavior. |
| return; |
| } |
| |
| if (is_es) { |
| // Desktop GL doesn't specify the GL_VERSION format, but ES spec requires |
| // the string to be in the format of "OpenGL ES major.minor other_info". |
| DCHECK_LE(3u, pieces[0].size()); |
| if (pieces[0][pieces[0].size() - 1] == 'V') { |
| // On Nexus 6 with Android N, GL_VERSION string is not spec compliant. |
| // There is no space between "3.1" and "V@104.0". |
| pieces[0].remove_suffix(1); |
| } |
| } |
| std::string gl_version; |
| pieces[0].CopyToString(&gl_version); |
| base::Version version(gl_version); |
| if (version.IsValid()) { |
| if (version.components().size() >= 1) { |
| major_version = version.components()[0]; |
| } |
| if (version.components().size() >= 2) { |
| minor_version = version.components()[1]; |
| } |
| if (is_es) { |
| if (major_version == 2) |
| is_es2 = true; |
| if (major_version == 3) |
| is_es3 = true; |
| } |
| } |
| |
| if (pieces.size() == 1) |
| return; |
| |
| constexpr base::StringPiece kVendors[] = { |
| "ANGLE", "Mesa", "INTEL", "NVIDIA", "ATI", "FireGL", "Chromium", "APPLE"}; |
| for (size_t ii = 1; ii < pieces.size(); ++ii) { |
| for (auto vendor : kVendors) { |
| if (pieces[ii] == vendor) { |
| vendor.CopyToString(&driver_vendor); |
| if (ii + 1 < pieces.size()) |
| pieces[ii + 1].CopyToString(&driver_version); |
| return; |
| } |
| } |
| } |
| if (pieces.size() == 2) { |
| if (pieces[1][0] == 'V') |
| pieces[1].remove_prefix(1); |
| pieces[1].CopyToString(&driver_version); |
| return; |
| } |
| constexpr base::StringPiece kMaliPrefix = "v1.r"; |
| if (base::StartsWith(pieces[1], kMaliPrefix, base::CompareCase::SENSITIVE)) { |
| // Mali drivers: v1.r12p0-04rel0.44f2946824bb8739781564bffe2110c9 |
| pieces[1].remove_prefix(kMaliPrefix.size()); |
| std::vector<base::StringPiece> numbers = base::SplitStringPiece( |
| pieces[1], "p", base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY); |
| if (numbers.size() != 2) |
| return; |
| std::vector<base::StringPiece> parts = base::SplitStringPiece( |
| pieces[2], ".", base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY); |
| if (parts.size() != 2) |
| return; |
| driver_vendor = "ARM"; |
| numbers[0].CopyToString(&driver_version); |
| driver_version += "."; |
| numbers[1].AppendToString(&driver_version); |
| driver_version += "."; |
| parts[0].AppendToString(&driver_version); |
| return; |
| } |
| for (size_t ii = 1; ii < pieces.size(); ++ii) { |
| if (pieces[ii].find('.') != std::string::npos) { |
| pieces[ii].CopyToString(&driver_version); |
| return; |
| } |
| } |
| } |
| |
| bool GLVersionInfo::IsES3Capable(const gfx::ExtensionSet& extensions) const { |
| // Version ES3 capable without extensions needed. |
| if (IsAtLeastGLES(3, 0) || IsAtLeastGL(4, 2)) { |
| return true; |
| } |
| |
| // Don't try supporting ES3 on ES2, or desktop before 3.3. |
| if (is_es || !IsAtLeastGL(3, 3)) { |
| return false; |
| } |
| |
| bool has_transform_feedback = |
| (IsAtLeastGL(4, 0) || |
| gfx::HasExtension(extensions, "GL_ARB_transform_feedback2")); |
| |
| // This code used to require the GL_ARB_gpu_shader5 extension in order to |
| // have support for dynamic indexing of sampler arrays, which was |
| // optionally supported in ESSL 1.00. However, since this is expressly |
| // forbidden in ESSL 3.00, and some desktop drivers (specifically |
| // Mesa/Gallium on AMD GPUs) don't support it, we no longer require it. |
| |
| // tex storage is available in core spec since GL 4.2. |
| bool has_tex_storage = |
| gfx::HasExtension(extensions, "GL_ARB_texture_storage"); |
| |
| // TODO(cwallez) check for texture related extensions. See crbug.com/623577 |
| |
| return (has_transform_feedback && has_tex_storage); |
| } |
| |
| } // namespace gl |