a9ddf5b7fd
Port of https://github.com/mapbox/mapbox-gl-js/pull/5101: adds a new render pass `Pass3D` before any other rendering wherein we render layers with 3D passes (fill-extrusion layers) to offscreen framebuffers, sharing a depth renderbuffer between those layers in order to render 3D space correctly. Those framebuffers are saved on the RenderLayers and copied back to the map during the translucent pass. Rendering to offscreen framebuffers before we do any clear + draw means we can avoid expensive framebuffer restores.
54 lines
1.1 KiB
C++
54 lines
1.1 KiB
C++
#pragma once
|
|
|
|
#include <mbgl/renderer/renderer_backend.hpp>
|
|
|
|
#include <memory>
|
|
#include <functional>
|
|
|
|
namespace mbgl {
|
|
|
|
class HeadlessDisplay;
|
|
|
|
class HeadlessBackend : public RendererBackend {
|
|
public:
|
|
HeadlessBackend(Size = { 256, 256 });
|
|
~HeadlessBackend() override;
|
|
|
|
void bind() override;
|
|
Size getFramebufferSize() const override;
|
|
void updateAssumedState() override;
|
|
|
|
void setSize(Size);
|
|
PremultipliedImage readStillImage();
|
|
|
|
struct Impl {
|
|
virtual ~Impl() = default;
|
|
virtual void activateContext() = 0;
|
|
virtual void deactivateContext() {}
|
|
};
|
|
|
|
private:
|
|
// Implementation specific functions
|
|
gl::ProcAddress initializeExtension(const char*) override;
|
|
|
|
void activate() override;
|
|
void deactivate() override;
|
|
|
|
bool hasContext() const { return bool(impl); }
|
|
bool hasDisplay();
|
|
|
|
void createContext();
|
|
|
|
std::shared_ptr<HeadlessDisplay> display;
|
|
std::unique_ptr<Impl> impl;
|
|
|
|
Size size;
|
|
float pixelRatio;
|
|
bool active = false;
|
|
|
|
class View;
|
|
std::unique_ptr<View> view;
|
|
};
|
|
|
|
} // namespace mbgl
|