Drawing

	shader.begin();
	
	shader.setUniformTexture("tex", buffer.getTexture(), 0);//白黒の図形を描画したofFbo
 	if (currentVid->isFrameNew())
		shader.setUniformTexture("video", currentVid->getTexture(), 1);//ofVideoPlayerのテクスチャ

	shader.setUniform4f("pl_1", pal.getColorArray(currentPalette)[0]);//配色用のofFloatColor配列
	shader.setUniform4f("pl_2", pal.getColorArray(currentPalette)[1]);
	shader.setUniform4f("pl_3", pal.getColorArray(currentPalette)[2]);
	shader.setUniform4f("pl_4", pal.getColorArray(currentPalette)[3]);
	shader.setUniform4f("pl_5", pal.getColorArray(currentPalette)[4]);
	
	GLfloat verts[] = {0.0, 0.0, screen_width, 0.0, 0.0, screen_height, screen_width, screen_height};

	//画面サイズの四角形を描画(無駄が無いように生GLで書いてますがofDrawRectangleでもいいかも)
	glEnableClientState(GL_VERTEX_ARRAY);
	glEnableClientState(GL_TEXTURE_COORD_ARRAY);
	
	glVertexPointer		(2, GL_FLOAT, 0, verts);
	glTexCoordPointer	(2, GL_FLOAT, 0, verts);
	
	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
	
	glDisableClientState(GL_TEXTURE_COORD_ARRAY);
	glDisableClientState(GL_VERTEX_ARRAY);
	
	shader.end();

palete_glsl

uniform sampler2DRect tex; //図形のFboテクスチャ
uniform sampler2DRect video;//動画のテクスチャ
	
uniform vec4 pl_1;//パレット5色
uniform vec4 pl_2;
uniform vec4 pl_3;
uniform vec4 pl_4;
uniform vec4 pl_5;
	
void main(void)
{
	vec2 st = gl_TexCoord[0].st;
	vec4 palette[5];
	
	palette[0] = pl_1;//base
	palette[1] = pl_2;
	palette[2] = pl_3;//accent
	palette[3] = pl_4;
	palette[4] = pl_5;
	
	vec4 col = texture2DRect(tex, st);
	vec4 vcl = texture2DRect(video, st / 1.5);
	vec4 dst;
		
	if (col.r == 0.2) //図形の明度が0.2の時だけ動画テクスチャ色を足す
		col += vcl;
		
	float gray = (col.r + col.g + col.b) / 3.0;
		
	float index = min(gray * 5.0, 4.0);//明るさから使用する配色を選択
	float mixer = mod(index, 1.0);
		
	dst = mix(palette[int(index)],
			  palette[int(mod(index + 1.0, 5.0))],
			  mixer);//アンチエイリアス風処理
	
	gl_FragColor = dst;//色確定
}