implemented SDL3 as an option for window manager

TSE_OpenGlImpl/src/buffer/FrameBuffer.cpp

@@ -0,0 +1,119 @@
+#include "FrameBuffer.hpp"
+#include "Debug.hpp"
+
+TSE::OpenGL::FrameBuffer::FrameBuffer(const Vector2 &size, uint textureCount)
+{
+    textureOutputCount = textureCount;
+    width = size.x;
+    height = size.y;
+    CreateFBTexture();
+    for (auto const& i : objectsToResize)
+    {
+        i->OnResize(size.x, size.y, this);
+    }
+    Initialize();
+}
+
+void TSE::OpenGL::FrameBuffer::Bind()
+{
+    glBindFramebuffer(GL_FRAMEBUFFER, bufferID);
+}
+
+void TSE::OpenGL::FrameBuffer::Unbind()
+{
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+}
+
+TSE::OpenGL::FrameBuffer::~FrameBuffer()
+{
+    glDeleteFramebuffers(1,&bufferID);
+    for (int i = 0; i < textureOutputCount; i++)
+    {
+        glDeleteTextures(1, &(textureIDs[i]));
+    }
+    glDeleteRenderbuffers(1, &depthRboID);
+}
+
+void TSE::OpenGL::FrameBuffer::Resize(Vector2 size)
+{
+    width = size.x;
+    height = size.y;
+    shouldResize = true;
+}
+
+void TSE::OpenGL::FrameBuffer::Update()
+{
+    if (!shouldResize) return;
+    shouldResize = false;
+    CreateFBTexture();
+    for (auto const& i : objectsToResize)
+    {
+        i->OnResize(width, height, this);
+    }
+}
+
+TSE::uint TSE::OpenGL::FrameBuffer::GetTextureId(uint id) const
+{
+    return textureIDs[id];
+}
+
+TSE::Vector2 TSE::OpenGL::FrameBuffer::GetSize() const
+{
+    return {width, height};
+}
+
+void TSE::OpenGL::FrameBuffer::Initialize()
+{
+    glGenFramebuffers(1, &bufferID);
+    Bind();
+    uint bufs[32];
+    for (int i = 0; i < textureOutputCount; i++)
+    {
+        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + i, GL_TEXTURE_2D, textureIDs[i], 0);
+        bufs[i] = GL_COLOR_ATTACHMENT0 + i;
+    }
+    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depthRboID);
+    
+    if(textureOutputCount > 1)
+        glDrawBuffers(textureOutputCount, bufs);
+
+    if(glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
+    {
+        TSE_ERROR("Failed to create OpenGL FBO.");
+        TSE_LOG(std::to_string(glGetError()));
+    }
+    Unbind();
+}
+
+void TSE::OpenGL::FrameBuffer::LoadFBTexture()
+{
+    for (int i = 0; i < textureOutputCount; i++)
+    {
+        glBindTexture(GL_TEXTURE_2D, textureIDs[i]);
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 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);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
+
+        glBindRenderbuffer(GL_RENDERBUFFER, depthRboID);
+        glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, width, height);
+    }
+}
+
+void TSE::OpenGL::FrameBuffer::CreateFBTexture()
+{
+    glViewport(0,0, width, height);
+    //resize
+    for (int i = 0; i < textureOutputCount; i++)
+    {
+        if(textureIDs[i] == 0)
+            glGenTextures(1, &(textureIDs[i]));
+    }
+    if(depthRboID == 0)
+        glGenRenderbuffers(1, &depthRboID);
+    LoadFBTexture();
+}