Add OpenGLPipelineState and integrate into main.cpp

engine/include/XCEngine/RHI/OpenGL/OpenGLPipelineState.h

@@ -0,0 +1,100 @@
+#pragma once
+
+#include <GLFW/glfw3.h>
+
+namespace XCEngine {
+namespace RHI {
+
+enum class ComparisonFunc {
+    Never,
+    Less,
+    Equal,
+    LessEqual,
+    Greater,
+    NotEqual,
+    GreaterEqual,
+    Always
+};
+
+enum class BlendFactor {
+    Zero,
+    One,
+    SrcColor,
+    OneMinusSrcColor,
+    DstColor,
+    OneMinusDstColor,
+    SrcAlpha,
+    OneMinusSrcAlpha,
+    DstAlpha,
+    OneMinusDstAlpha,
+    ConstantColor,
+    OneMinusConstantColor,
+    ConstantAlpha,
+    OneMinusConstantAlpha
+};
+
+enum class CullFace {
+    Front,
+    Back,
+    FrontAndBack
+};
+
+enum class FrontFace {
+    Clockwise,
+    CounterClockwise
+};
+
+struct DepthStencilState {
+    bool depthTestEnable = true;
+    bool depthWriteEnable = true;
+    ComparisonFunc depthFunc = ComparisonFunc::Less;
+};
+
+struct BlendState {
+    bool blendEnable = false;
+    BlendFactor srcBlend = BlendFactor::SrcAlpha;
+    BlendFactor dstBlend = BlendFactor::OneMinusSrcAlpha;
+    BlendFactor srcBlendAlpha = BlendFactor::One;
+    BlendFactor dstBlendAlpha = BlendFactor::Zero;
+};
+
+struct RasterizerState {
+    bool cullFaceEnable = true;
+    CullFace cullFace = CullFace::Back;
+    FrontFace frontFace = FrontFace::CounterClockwise;
+    bool polygonModeFill = true;
+};
+
+struct ViewportState {
+    int x = 0;
+    int y = 0;
+    int width = 0;
+    int height = 0;
+    float minDepth = 0.0f;
+    float maxDepth = 1.0f;
+};
+
+class OpenGLPipelineState {
+public:
+    OpenGLPipelineState();
+    ~OpenGLPipelineState();
+
+    void SetDepthStencilState(const DepthStencilState& state);
+    void SetBlendState(const BlendState& state);
+    void SetRasterizerState(const RasterizerState& state);
+    void SetViewport(const ViewportState& state);
+
+    void Apply();
+    void SetClearColor(float r, float g, float b, float a);
+    void Clear(unsigned int buffers);
+
+private:
+    DepthStencilState m_depthStencilState;
+    BlendState m_blendState;
+    RasterizerState m_rasterizerState;
+    ViewportState m_viewportState;
+    float m_clearColor[4];
+};
+
+} // namespace RHI
+} // namespace XCEngine