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// Copyright 2015 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 <memory>
#include "base/command_line.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/gl/gl_implementation.h"
#include "ui/gl/gl_surface_wgl.h"
#include "ui/gl/gl_wgl_api_implementation.h"
typedef std::pair<std::string, std::string> stringpair;
namespace gl {
class WGLApiTest : public testing::Test {
public:
void SetUp() override {
GLSurfaceWGL::InitializeOneOffForTesting();
fake_arb_extension_string_ = "";
fake_ext_extension_string_ = "";
g_driver_wgl.ClearBindings();
g_driver_wgl.fn.wglGetExtensionsStringARBFn = &FakeGetExtensionsStringARB;
g_driver_wgl.fn.wglGetExtensionsStringEXTFn = &FakeGetExtensionsStringEXT;
SetGLImplementation(kGLImplementationDesktopGL);
SetGLGetProcAddressProc(&FakeGLGetProcAddress);
}
void TearDown() override {
g_current_wgl_context = nullptr;
api_.reset(nullptr);
g_driver_wgl.ClearBindings();
fake_ext_extension_string_ = "";
fake_arb_extension_string_ = "";
}
void InitializeAPI(base::CommandLine* command_line) {
api_.reset(new RealWGLApi());
g_current_wgl_context = api_.get();
if (command_line)
api_->InitializeWithCommandLine(&g_driver_wgl, command_line);
else
api_->Initialize(&g_driver_wgl);
g_driver_wgl.InitializeExtensionBindings();
}
void SetFakeEXTExtensionString(const char* fake_string) {
fake_ext_extension_string_ = fake_string;
}
void SetFakeARBExtensionString(const char* fake_string) {
fake_arb_extension_string_ = fake_string;
}
stringpair GetExtensions() {
auto stringify = [](const char* str) -> std::string {
return str ? str : "";
};
return stringpair(
stringify(wglGetExtensionsStringARB(NULL)),
stringify(wglGetExtensionsStringEXT()));
}
static GLFunctionPointerType WINAPI FakeGLGetProcAddress(const char* proc) {
return NULL;
}
static const char* GL_BINDING_CALL FakeGetExtensionsStringARB(HDC dc) {
return fake_arb_extension_string_;
}
static const char* GL_BINDING_CALL FakeGetExtensionsStringEXT() {
return fake_ext_extension_string_;
}
protected:
static const char* fake_ext_extension_string_;
static const char* fake_arb_extension_string_;
std::unique_ptr<RealWGLApi> api_;
};
const char* WGLApiTest::fake_ext_extension_string_ = "";
const char* WGLApiTest::fake_arb_extension_string_ = "";
TEST_F(WGLApiTest, DisabledExtensionBitTest) {
static const char* kFakeExtensions = "WGL_ARB_extensions_string";
static const char* kFakeDisabledExtensions = "WGL_ARB_extensions_string";
InitializeAPI(nullptr);
EXPECT_FALSE(g_driver_wgl.ext.b_WGL_ARB_extensions_string);
base::CommandLine command_line(base::CommandLine::NO_PROGRAM);
command_line.AppendSwitchASCII(switches::kDisableGLExtensions,
kFakeDisabledExtensions);
// NULL simulates not being able to resolve wglGetExtensionsStringARB
SetFakeARBExtensionString(NULL);
SetFakeEXTExtensionString(kFakeExtensions);
InitializeAPI(nullptr);
EXPECT_TRUE(g_driver_wgl.ext.b_WGL_ARB_extensions_string);
InitializeAPI(&command_line);
EXPECT_FALSE(g_driver_wgl.ext.b_WGL_ARB_extensions_string);
SetFakeARBExtensionString("");
SetFakeEXTExtensionString(kFakeExtensions);
InitializeAPI(nullptr);
// We expect false here, because wglGetExtensionsStringARB
// always takes precedence over wglGetExtensionsStringEXT
// if it is available.
EXPECT_FALSE(g_driver_wgl.ext.b_WGL_ARB_extensions_string);
SetFakeARBExtensionString(kFakeExtensions);
SetFakeEXTExtensionString("");
InitializeAPI(nullptr);
EXPECT_TRUE(g_driver_wgl.ext.b_WGL_ARB_extensions_string);
InitializeAPI(&command_line);
EXPECT_FALSE(g_driver_wgl.ext.b_WGL_ARB_extensions_string);
}
TEST_F(WGLApiTest, DisabledExtensionStringTest) {
static const char* kFakeExtensions = "EGL_EXT_1 EGL_EXT_2"
" EGL_EXT_3 EGL_EXT_4";
static const char* kFakeDisabledExtensions =
"EGL_EXT_1,EGL_EXT_2,EGL_FAKE";
static const char* kFilteredExtensions = "EGL_EXT_3 EGL_EXT_4";
base::CommandLine command_line(base::CommandLine::NO_PROGRAM);
command_line.AppendSwitchASCII(switches::kDisableGLExtensions,
kFakeDisabledExtensions);
SetFakeARBExtensionString(kFakeExtensions);
SetFakeEXTExtensionString(kFakeExtensions);
InitializeAPI(nullptr);
EXPECT_EQ(stringpair(kFakeExtensions, kFakeExtensions),
GetExtensions());
InitializeAPI(&command_line);
EXPECT_EQ(stringpair(kFilteredExtensions, kFilteredExtensions),
GetExtensions());
}
} // namespace gl
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