Renderer.h

// Copyright(c) 2019 - 2020, #Momo
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// 
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// modification, are permitted provided that the following conditions are met :
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// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
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#pragma once

#include "Platform/GraphicAPI.h"

enum class BlendFactor
{
    NONE,
    ONE_MINUS_SRC_COLOR,
    SRC_ALPHA,
    ONE_MINUS_SRC_ALPHA,
    DST_ALPHA,
    ONE_MINUS_DST_ALPHA,
    DST_COLOR,
    ONE_MINUS_DST_COLOR,
    CONSTANT_COLOR,
    ONE_MINUS_CONSTANT_COLOR,
    CONSTANT_ALPHA,
    ONE_MINUS_CONSTANT_ALPHA,
};

namespace MxEngine
{
    class Renderer
    {
        bool depthBufferEnabled = false;
        unsigned int clearMask = 0;
    public:
        Renderer();

        void DrawTriangles(const VertexArray& vao, const IndexBuffer& ibo, const Shader& shader) const;
        void DrawTriangles(const VertexArray& vao, size_t vertexCount, const Shader& shader) const;
        void DrawTrianglesInstanced(const VertexArray& vao, const IndexBuffer& ibo, const Shader& shader, size_t count) const;
        void DrawTrianglesInstanced(const VertexArray& vao, size_t vertexCount, const Shader& shader, size_t count) const;
        void DrawLines(const VertexArray& vao, size_t vertexCount, const Shader& shader) const;
        void DrawLines(const VertexArray& vao, const IndexBuffer& ibo, const Shader& shader) const;
        void DrawLinesInstanced(const VertexArray& vao, const IndexBuffer& ibo, const Shader& shader, size_t count) const;
        void DrawLinesInstanced(const VertexArray& vao, size_t vertexCount, const Shader& shader, size_t count) const;
        void SetDefaultVertexAttribute(size_t index, float v) const;
        void SetDefaultVertexAttribute(size_t index, const Vector2& vec) const;
        void SetDefaultVertexAttribute(size_t index, const Vector3& vec) const;
        void SetDefaultVertexAttribute(size_t index, const Vector4& vec) const;
        void SetDefaultVertexAttribute(size_t index, const Matrix4x4& mat) const;
        void SetDefaultVertexAttribute(size_t index, const Matrix3x3& mat) const;
        void Clear() const;
        void Flush() const;
        void Finish() const;
        void SetViewport(int x, int y, int width, int height) const;
        Renderer& UseColorMask(bool r, bool g, bool b, bool a);
        Renderer& UseDepthBufferMask(bool value = true);
        Renderer& UseSampling(bool value = true);
        Renderer& UseDepthBuffer(bool value = true);
        Renderer& UseReversedDepth(bool value = true);
        Renderer& UseCulling(bool value = true, bool counterClockWise = true, bool cullBack = true);
        Renderer& UseClearColor(float r, float g, float b, float a = 0.0f);
        Renderer& UseBlending(BlendFactor src, BlendFactor dist);
        Renderer& UseAnisotropicFiltering(float factor);
        Renderer& UseLineWidth(size_t width);
        float GetLargestAnisotropicFactor() const;
    };
}