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/*
Copyright 2016-2023 melonDS team
This file is part of melonDS.
melonDS is free software: you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option)
any later version.
melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with melonDS. If not, see http://www.gnu.org/licenses/.
*/
#pragma once
#include "OpenGLSupport.h"
#include <array>
#include <optional>
namespace melonDS
{
class GPU;
struct RenderSettings;
class GLRenderer;
class GLCompositor
{
public:
static std::optional<GLCompositor> New() noexcept;
GLCompositor(const GLCompositor&) = delete;
GLCompositor& operator=(const GLCompositor&) = delete;
GLCompositor(GLCompositor&&) noexcept;
GLCompositor& operator=(GLCompositor&&) noexcept;
~GLCompositor();
void SetScaleFactor(int scale) noexcept;
[[nodiscard]] int GetScaleFactor() const noexcept { return Scale; }
void Stop(const GPU& gpu) noexcept;
void RenderFrame(const GPU& gpu, GLRenderer& renderer) noexcept;
void BindOutputTexture(int buf);
private:
GLCompositor(std::array<GLuint, 3> CompShader) noexcept;
int Scale = 0;
int ScreenH = 0, ScreenW = 0;
std::array<GLuint, 3> CompShader {};
GLuint CompScaleLoc = 0;
GLuint Comp3DXPosLoc = 0;
GLuint CompVertexBufferID = 0;
GLuint CompVertexArrayID = 0;
struct CompVertex
{
std::array<float, 2> Position {};
std::array<float, 2> Texcoord {};
};
std::array<CompVertex, 2*3*2> CompVertices {};
GLuint CompScreenInputTex = 0;
std::array<GLuint, 2> CompScreenOutputTex {};
std::array<GLuint, 2> CompScreenOutputFB {};
};
}
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