[add]: Start of a basic rendering backend

1 files changed, 47 insertions, 0 deletions

diff --git a/src/Platform/OpenGL/OpenGLShader.h b/src/Platform/OpenGL/OpenGLShader.h
new file mode 100644
index 0000000..2ebde12
--- /dev/null
+++ b/src/Platform/OpenGL/OpenGLShader.h
@@ -0,0 +1,47 @@
+#pragma once
+
+#include "Rendering/Shader.h"
+#include <unordered_map>
+#include <glm/glm.hpp>
+
+namespace Donut 
+{
+    class OpenGLShader 
+        : public Shader 
+    {
+    public:
+        OpenGLShader(const std::string& filepath);
+        OpenGLShader(const std::string& name, const std::string& vertexSrc, const std::string& fragmentSrc);
+        virtual ~OpenGLShader();
+
+        virtual void Bind()   const override;
+        virtual void Unbind() const override;
+
+        virtual void SetInt(const std::string& name, int value) override;
+        virtual void SetIntArray(const std::string& name, int* values, uint32_t count) override;
+        virtual void SetFloat(const std::string& name, float value) override;
+        virtual void SetFloat3(const std::string& name, const glm::vec3& value) override;
+        virtual void SetFloat4(const std::string& name, const glm::vec4& value) override;
+        virtual void SetMat4(const std::string& name, const glm::mat4& value) override;
+
+        virtual const std::string& GetName() const override { return m_Name; }
+
+        void UploadUniformInt(const std::string& name, int value);
+        void UploadUniformIntArray(const std::string& name, int* values, uint32_t count);
+        void UploadUniformFloat(const std::string& name, float value);
+        void UploadUniformFloat2(const std::string& name, const glm::vec2& value);
+        void UploadUniformFloat3(const std::string& name, const glm::vec3& value);
+        void UploadUniformFloat4(const std::string& name, const glm::vec4& value);
+        void UploadUniformMat3(const std::string& name, const glm::mat3& matrix);
+        void UploadUniformMat4(const std::string& name, const glm::mat4& matrix);
+
+    private:
+        std::string ReadFile(const std::string& filepath);
+        std::unordered_map<uint32_t, std::string> PreProcess(const std::string& source);
+        void Compile(const std::unordered_map<uint32_t, std::string>& shaderSources);
+
+    private:
+        uint32_t m_RendererID;
+        std::string m_Name;
+    };
+};