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#pragma once
#include <mbgl/gfx/headless_backend.hpp>
#include <mbgl/gl/renderer_backend.hpp>
#include <memory>
#include <functional>
namespace mbgl {
namespace gl {
class HeadlessBackend final : public gl::RendererBackend, public gfx::HeadlessBackend {
public:
HeadlessBackend(Size = {256, 256},
SwapBehaviour = SwapBehaviour::NoFlush,
gfx::ContextMode = gfx::ContextMode::Unique);
~HeadlessBackend() override;
void updateAssumedState() override;
gfx::Renderable& getDefaultRenderable() override;
PremultipliedImage readStillImage() override;
RendererBackend* getRendererBackend() override;
void swap();
class Impl {
public:
virtual ~Impl() = default;
virtual gl::ProcAddress getExtensionFunctionPointer(const char*) = 0;
virtual void activateContext() = 0;
virtual void deactivateContext() {}
};
private:
// Implementation specific functions
gl::ProcAddress getExtensionFunctionPointer(const char*) override;
void activate() override;
void deactivate() override;
void createImpl();
private:
std::unique_ptr<Impl> impl;
bool active = false;
SwapBehaviour swapBehaviour = SwapBehaviour::NoFlush;
};
} // namespace gl
} // namespace mbgl
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