feat: start of a basic rendering backend

1 files changed, 47 insertions, 0 deletions

diff --git a/src/platform/opengl/opengl_shader.h b/src/platform/opengl/opengl_shader.h
new file mode 100644
index 0000000..e87c839
--- /dev/null
+++ b/src/platform/opengl/opengl_shader.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& vertex_src, const std::string& fragment_src);
+        virtual ~OpenGLShader();
+
+        virtual void bind()   const override;
+        virtual void unbind() const override;
+
+        virtual void set_int(const std::string& name, int value) override;
+        virtual void set_int_array(const std::string& name, int* values, uint32_t count) override;
+        virtual void set_float(const std::string& name, float value) override;
+        virtual void set_float3(const std::string& name, const glm::vec3& value) override;
+        virtual void set_float4(const std::string& name, const glm::vec4& value) override;
+        virtual void set_mat4(const std::string& name, const glm::mat4& value) override;
+
+        virtual const std::string& get_name() const override { return m_name; }
+
+        void upload_uniform_int(const std::string& name, int value);
+        void upload_uniform_int_array(const std::string& name, int* values, uint32_t count);
+        void upload_uniform_float(const std::string& name, float value);
+        void upload_uniform_float2(const std::string& name, const glm::vec2& value);
+        void upload_uniform_float3(const std::string& name, const glm::vec3& value);
+        void upload_uniform_float4(const std::string& name, const glm::vec4& value);
+        void upload_uniform_mat3(const std::string& name, const glm::mat3& matrix);
+        void upload_uniform_mat4(const std::string& name, const glm::mat4& matrix);
+
+    private:
+        std::string read_file(const std::string& filepath);
+        std::unordered_map<uint32_t, std::string> pre_process(const std::string& source);
+        void compile(const std::unordered_map<uint32_t, std::string>& shader_sources);
+
+    private:
+        uint32_t m_renderer_id;
+        std::string m_name;
+    };
+};