【DxLib】ブラー処理させたい【2D】

構成

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ブラー処理させよう

      ブラー処理させよう

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参考ページ
https://dixq.net/forum/viewtopic.php?t=3768

させました。ドン！（構造体にした以外参考ページのまんま）

#pragma once
#ifndef _BLURSCREEN_HPP
#define _BLURSCREEN_HPP
#include "DxLib.h"



struct BlurScreen
{
private:
	int m_screen[2];
	int m_current;
	int m_alpha;
	int m_screenWidth, m_screenHeight;
	int m_offsetX1, m_offsetX2, m_offsetY1, offsetY2;
	int m_notBlendDraw;


public:
	BlurScreen() 
	{
		m_screen[0] = 0;
		m_screen[1] = 0;
		m_current = 0;
		m_alpha = 0;
		m_screenWidth = 0;
		m_screenHeight = 0;
		m_offsetX1 = 0;
		m_offsetX2 = 0; 
		m_offsetY1 = 0; 
		offsetY2 = 0; 
		m_notBlendDraw = 0;
	}
	~BlurScreen() {}


	void Init(int alpha, int offsetX1, int offsetY1, int offsetX2, int offsetY2);
	void ReplayInit();
	void Release();

	void PreRenderBlurScreen();

	void PostRenderBlurScreen();
};

#endif // !_BLURSCREEN_HPP

#include "BlurScreen.hpp"



/// ------------------------------------------------------------------------------------------------------------
void BlurScreen::Init(int t_alpha, int t_offsetX1, int t_offsetY1, int t_offsetX2, int t_offsetY2)
{
	m_screenWidth = 1920;
	m_screenHeight = 1080;
	for (int i = 0; i < 2; ++i)
	{
		m_screen[i] = -1;
		m_screen[i] = MakeScreen(m_screenWidth, m_screenHeight);
	}
	m_current = 0;
	m_alpha = t_alpha;
	m_offsetX1 = t_offsetX1;
	m_offsetX2 = t_offsetX2;
	m_offsetY1 = t_offsetY1;
	offsetY2 = t_offsetY2;

	m_notBlendDraw = 0;
}



/// ------------------------------------------------------------------------------------------------------------
void BlurScreen::ReplayInit()
{
	for (int i = 0; i < 2; ++i)
	{
		if (m_screen[i] != -1) DeleteGraph(m_screen[i]);
		m_screen[i] = MakeScreen(m_screenWidth, m_screenHeight);
	}
	m_current = 0;

	m_notBlendDraw = 0;
}



/// ------------------------------------------------------------------------------------------------------------
void BlurScreen::Release()
{
	for (int i = 0; i < 2; ++i)
	{
		if (m_screen[i] != -1) DeleteGraph(m_screen[i]);
	}
}



/// ------------------------------------------------------------------------------------------------------------
void BlurScreen::PreRenderBlurScreen()
{
	SetDrawScreen(m_screen[m_current]);
	ClearDrawScreen();
}



/// ------------------------------------------------------------------------------------------------------------
void BlurScreen::PostRenderBlurScreen()
{
	int drawMode = GetDrawMode();
	SetDrawMode(DX_DRAWMODE_BILINEAR);

	int blendMode, param;
	GetDrawBlendMode(&blendMode, &param);
	SetDrawBlendMode(DX_BLENDMODE_ALPHA, m_alpha);

	if (m_notBlendDraw++ > 2)
	{
		DrawExtendGraph(m_offsetX1, m_offsetY1, m_screenWidth + m_offsetX2, m_screenHeight + offsetY2, m_screen[1 - m_current], false);
	}
	SetDrawBlendMode(blendMode, param);
	SetDrawMode(drawMode);

	SetDrawScreen(DX_SCREEN_BACK);
	DrawGraph(0, 0, m_screen[m_current], false);
	m_current = 1 - m_current;
}

ReplayInit()がある理由としては、開始時に初期化が必要だったため。

あとは行うところで描画の最前にPreRenderBlurScreen()を読んで最後にPostRenderBlurScreen()を呼ぶだけ。