GameCodingCompleteLinux/Source/GCC4/Graphics3D/OpenGLRenderer.cpp

#include "OpenGLRenderer.h"
#include "../Unix/GameCodeStd.h"
#include <SDL3/SDL.h>
#include <GL/glew.h>
#include <imgui.h>
#include <imgui_impl_sdl3.h>
#include <imgui_impl_opengl3.h>

void OpenGLRenderer46::VSetBackgroundColor(unsigned char bgA, unsigned char bgR, unsigned char bgG, unsigned char bgB)
{
	glClearColor(
		(float) bgR / 255.0f,
		(float) bgG / 255.0f,
		(float) bgB / 255.0f,
		(float) bgA / 255.0f
	);
}

int OpenGLRenderer46::VOnRestore()
{
	return 0;
}

void OpenGLRenderer46::VShutdown()
{

}

bool OpenGLRenderer46::VPreRender()
{
	// clear screen
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    // Start the Dear ImGui frame
	ImGui_ImplOpenGL3_NewFrame();
	ImGui_ImplSDL3_NewFrame();
	ImGui::NewFrame();
    return true;
}

bool OpenGLRenderer46::VPostRender()
{

	// Rendering
	ImGui::Render();
	
	// update the screen
	ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
	SDL_GL_SwapWindow(g_pApp->m_Window);
	return true;
}

std::shared_ptr<IRenderState> OpenGLRenderer46::VPrepareAlphaPass()
{
	return std::shared_ptr<IRenderState>();
}

std::shared_ptr<IRenderState> OpenGLRenderer46::VPrepareSkyBoxPass()
{
	return std::shared_ptr<IRenderState>();
}

void OpenGLRenderer46::VSetWorldTransform(glm::mat4 m)
{
	// TODO(munnellg) - implement
}

void OpenGLRenderer46::VSetViewTransform(glm::mat4 m)
{
	// TODO(munnellg) - implement
}

void OpenGLRenderer46::VSetProjectionTransform(glm::mat4 m)
{
	// TODO(munnellg) - implement
}