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// 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.
#ifndef UI_GL_GL_VERSION_INFO_H_
#define UI_GL_GL_VERSION_INFO_H_
#include <set>
#include <string>
#include "base/macros.h"
#include "build/build_config.h"
#include "ui/gfx/extension_set.h"
#include "ui/gl/gl_export.h"
namespace gl {
struct GL_EXPORT GLVersionInfo {
GLVersionInfo(const char* version_str,
const char* renderer_str,
const gfx::ExtensionSet& exts);
bool IsAtLeastGL(unsigned major, unsigned minor) const {
return !is_es && (major_version > major ||
(major_version == major && minor_version >= minor));
}
bool IsLowerThanGL(unsigned major, unsigned minor) const {
return !is_es && (major_version < major ||
(major_version == major && minor_version < minor));
}
bool IsAtLeastGLES(unsigned major, unsigned minor) const {
return is_es && (major_version > major ||
(major_version == major && minor_version >= minor));
}
bool BehavesLikeGLES() const {
return is_es || is_desktop_core_profile;
}
bool SupportsFixedType() const {
return is_es || IsAtLeastGL(4, 1);
}
struct VersionStrings {
const char* gl_version;
const char* glsl_version;
};
// Returns version strings for GL and GLSL (similar to glGetString(GL_VERSION)
// and glGetString(GL_SHADING_LANGUAGE_VERSION) matching major/minor versions
VersionStrings GetFakeVersionStrings(unsigned major, unsigned minor) const;
// Returns true if the major/minor version was changed for any reasons and we
// might need to propagate changes further, e.g. to Skia
bool IsVersionSubstituted() const;
// We need to emulate GL_ALPHA and GL_LUMINANCE and GL_LUMINANCE_ALPHA
// texture formats on core profile and ES3, except for ANGLE and Swiftshader.
bool NeedsLuminanceAlphaEmulation() const {
return !is_angle && !is_swiftshader && (is_es3 || is_desktop_core_profile);
}
bool is_es = false;
bool is_angle = false;
bool is_d3d = false;
bool is_mesa = false;
bool is_swiftshader = false;
bool is_angle_metal = false;
bool is_angle_swiftshader = false;
bool is_angle_vulkan = false;
unsigned major_version = 0;
unsigned minor_version = 0;
bool is_es2 = false;
bool is_es3 = false;
bool is_desktop_core_profile = false;
bool is_es3_capable = false;
std::string driver_vendor;
std::string driver_version;
static void DisableES3ForTesting();
private:
void Initialize(const char* version_str,
const char* renderer_str,
const gfx::ExtensionSet& extensions);
void ParseVersionString(const char* version_str);
void ExtractDriverVendorANGLE(const char* renderer_str);
bool IsES3Capable(const gfx::ExtensionSet& extensions) const;
DISALLOW_COPY_AND_ASSIGN(GLVersionInfo);
};
} // namespace gl
#endif // UI_GL_GL_VERSION_INFO_H_
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