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#include <mbgl/test/util.hpp>
#include <mbgl/renderer/renderer_backend.hpp>
#include <mbgl/gfx/backend_scope.hpp>
#include <functional>
using namespace mbgl;
class StubRendererBackend: public RendererBackend {
public:
void bind() override {
}
mbgl::Size getFramebufferSize() const override {
return mbgl::Size{};
}
void activate() override {
if (activateFunction) activateFunction();
}
void deactivate() override {
if (deactivateFunction) deactivateFunction();
}
void updateAssumedState() override {
if (updateAssumedStateFunction) updateAssumedStateFunction();
}
gl::ProcAddress getExtensionFunctionPointer(const char*) override {
return {};
}
std::function<void ()> activateFunction;
std::function<void ()> deactivateFunction;
std::function<void ()> updateAssumedStateFunction;
};
// A scope should activate on construction
// and deactivate on descruction (going out
// of scope)
TEST(BackendScope, SingleScope) {
bool activated;
bool deactivated;
StubRendererBackend backend;
backend.activateFunction = [&] { activated = true; };
backend.deactivateFunction = [&] { deactivated = true; };
{
gfx::BackendScope test { backend };
}
ASSERT_TRUE(activated);
ASSERT_TRUE(deactivated);
}
// With nested scopes, only the outer scope
// should activate/deactivate
TEST(BackendScope, NestedScopes) {
int activated = 0;
int deactivated = 0;
StubRendererBackend backend;
backend.activateFunction = [&] { activated++; };
backend.deactivateFunction = [&] { deactivated++; };
{
gfx::BackendScope outer { backend };
ASSERT_EQ(1, activated);
{
gfx::BackendScope inner { backend };
ASSERT_EQ(1, activated);
}
ASSERT_EQ(0, deactivated);
}
ASSERT_EQ(1, deactivated);
}
// With chained scopes, where scopes have
// different backends, the scopes should each
// activate the scope on entering and de-activating
// on leaving the scope
TEST(BackendScope, ChainedScopes) {
bool activatedA = false;
bool activatedB = false;
StubRendererBackend backendA;
backendA.activateFunction = [&] { activatedA = true; };
backendA.deactivateFunction = [&] { activatedA = false; };
StubRendererBackend backendB;
backendB.activateFunction = [&] { activatedB = true; };
backendB.deactivateFunction = [&] { activatedB = false; };
{
gfx::BackendScope scopeA { backendA };
ASSERT_TRUE(activatedA);
{
gfx::BackendScope scopeB { backendB };
ASSERT_FALSE(activatedA);
ASSERT_TRUE(activatedB);
}
ASSERT_FALSE(activatedB);
ASSERT_TRUE(activatedA);
}
ASSERT_FALSE(activatedA);
ASSERT_FALSE(activatedB);
}
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