Repo created

libs/drape/graphics_context.hpp

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+#pragma once
+
+#include "drape/drape_global.hpp"
+#include "drape/pointers.hpp"
+
+#include <string>
+
+namespace dp
+{
+enum ClearBits : uint32_t
+{
+  ColorBit = 1,
+  DepthBit = 1 << 1,
+  StencilBit = 1 << 2
+};
+
+uint32_t constexpr kClearBitsStoreAll = ClearBits::ColorBit | ClearBits::DepthBit | ClearBits::StencilBit;
+
+enum class TestFunction : uint8_t
+{
+  Never = 0,
+  Less,
+  Equal,
+  LessOrEqual,
+  Greater,
+  NotEqual,
+  GreaterOrEqual,
+  Always
+};
+
+enum class StencilFace : uint8_t
+{
+  Front = 0,
+  Back,
+  FrontAndBack
+};
+
+enum class StencilAction : uint8_t
+{
+  Keep = 0,
+  Zero,
+  Replace,
+  Increment,
+  IncrementWrap,
+  Decrement,
+  DecrementWrap,
+  Invert
+};
+
+class GraphicsContext
+{
+public:
+  virtual ~GraphicsContext() = default;
+  virtual bool BeginRendering() { return true; }
+  virtual void EndRendering() {}
+  virtual void Present() = 0;
+  virtual void MakeCurrent() = 0;
+  virtual void DoneCurrent() {}
+  // The value 'nullptr' means default(system) framebuffer.
+  virtual void SetFramebuffer(ref_ptr<BaseFramebuffer> framebuffer) = 0;
+  virtual void ForgetFramebuffer(ref_ptr<BaseFramebuffer> framebuffer) = 0;
+  virtual void ApplyFramebuffer(std::string const & framebufferLabel) = 0;
+  // w, h - pixel size of render target (logical size * visual scale).
+  virtual void Resize(uint32_t /* w */, uint32_t /* h */) {}
+  virtual void SetRenderingEnabled(bool /* enabled */) {}
+  virtual void SetPresentAvailable(bool /* available */) {}
+  virtual bool Validate() { return true; }
+  virtual void CollectMemory() {}
+
+  virtual void Init(ApiVersion apiVersion) = 0;
+  virtual ApiVersion GetApiVersion() const = 0;
+  virtual std::string GetRendererName() const = 0;
+  virtual std::string GetRendererVersion() const = 0;
+  virtual bool HasPartialTextureUpdates() const { return true; }
+
+  virtual void DebugSynchronizeWithCPU() {}
+  virtual void PushDebugLabel(std::string const & label) = 0;
+  virtual void PopDebugLabel() = 0;
+
+  virtual void SetClearColor(Color const & color) = 0;
+  virtual void Clear(uint32_t clearBits, uint32_t storeBits) = 0;
+  virtual void Flush() = 0;
+  virtual void SetViewport(uint32_t x, uint32_t y, uint32_t w, uint32_t h) = 0;
+  virtual void SetScissor(uint32_t x, uint32_t y, uint32_t w, uint32_t h) = 0;
+  virtual void SetDepthTestEnabled(bool enabled) = 0;
+  virtual void SetDepthTestFunction(TestFunction depthFunction) = 0;
+  virtual void SetStencilTestEnabled(bool enabled) = 0;
+  virtual void SetStencilFunction(StencilFace face, TestFunction stencilFunction) = 0;
+  virtual void SetStencilActions(StencilFace face, StencilAction stencilFailAction, StencilAction depthFailAction,
+                                 StencilAction passAction) = 0;
+  virtual void SetStencilReferenceValue(uint32_t stencilReferenceValue) = 0;
+  virtual void SetCullingEnabled(bool enabled) = 0;
+};
+}  // namespace dp