added rest of the openGL implementation theoreticaly the engine can render now

TSE_GlfwOpenGlImpl/src/buffer/FrameBuffer.cpp

@@ -0,0 +1,97 @@
+#include "FrameBuffer.hpp"
+#include "Debug.hpp"
+
+TSE::GLFW::FrameBuffer::FrameBuffer(const Vector2 &size)
+{
+    this->size = size;
+    CreateFBTexture();
+    for (auto const& i : objectsToResize)
+    {
+        i->OnResize(size.x, size.y, this);
+    }
+    Initialize();
+}
+
+void TSE::GLFW::FrameBuffer::Bind()
+{
+    glBindFramebuffer(GL_FRAMEBUFFER, bufferID);
+}
+
+void TSE::GLFW::FrameBuffer::Unbind()
+{
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+}
+
+TSE::GLFW::FrameBuffer::~FrameBuffer()
+{
+    glDeleteFramebuffers(1,&bufferID);
+    glDeleteTextures(1, &textureID);
+    glDeleteRenderbuffers(1, &depthRboID);
+}
+
+void TSE::GLFW::FrameBuffer::Resize(Vector2 size)
+{
+    this->size = size;
+    shouldResize = true;
+}
+
+void TSE::GLFW::FrameBuffer::Update()
+{
+    if (!shouldResize) return;
+    shouldResize = false;
+    CreateFBTexture();
+    for (auto const& i : objectsToResize)
+    {
+        i->OnResize(size.x, size.y, this);
+    }
+}
+
+TSE::uint TSE::GLFW::FrameBuffer::GetTextureId() const
+{
+    return textureID;
+}
+
+TSE::Vector2 TSE::GLFW::FrameBuffer::GetSize() const
+{
+    return size;
+}
+
+void TSE::GLFW::FrameBuffer::Initialize()
+{
+    glGenFramebuffers(1, &bufferID);
+    Bind();
+    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, textureID, 0);
+    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depthRboID);
+    
+    if(glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
+    {
+        TSE_ERROR("Failed to create OpenGL FBO.");
+        TSE_LOG(std::to_string(glGetError()));
+    }
+    Unbind();
+}
+
+void TSE::GLFW::FrameBuffer::LoadFBTexture()
+{
+    glBindTexture(GL_TEXTURE_2D, textureID);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, size.x, size.y, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
+
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+    glBindRenderbuffer(GL_RENDERBUFFER, depthRboID);
+    glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, size.x, size.y);
+}
+
+void TSE::GLFW::FrameBuffer::CreateFBTexture()
+{
+    glViewport(0,0, size.x, size.y);
+    //resize
+    if(textureID == 0)
+        glGenTextures(1, &textureID);
+    if(depthRboID == 0)
+        glGenRenderbuffers(1, &depthRboID);
+    LoadFBTexture();
+}