uniform mat4 vp_matrix;
uniform sampler2D tex;

#pragma MSP stage(vertex)
layout(location=0) in vec4 position;
layout(location=1) in vec2 texcoord;
layout(location=2) in vec4 instance_transform[3];
void main()
{
	passthrough;
	mat4 model_matrix = transpose(mat4(instance_transform[0], instance_transform[1], instance_transform[2], vec4(0.0, 0.0, 0.0, 1.0)));
	gl_Position = vp_matrix*model_matrix*position;
}

#pragma MSP stage(geometry)
layout(triangles) in;
layout(triangles, max_vertices=3) out;
void main()
{
	for(int i=0; i<3; ++i)
	{
		passthrough[i];
		EmitVertex();
	}
}

#pragma MSP stage(fragment)
layout(location=0) out vec4 frag_color;
void main()
{
	frag_color = texture(tex, texcoord);
}

/* Expected output: vertex
uniform mat4 vp_matrix;
layout(location=0) in vec4 position;
layout(location=1) in vec2 texcoord;
layout(location=2) in vec4 instance_transform[3];
out vec2 _vs_out_texcoord;
void main()
{
  _vs_out_texcoord = texcoord;
  gl_Position = vp_matrix*transpose(mat4(instance_transform[0], instance_transform[1], instance_transform[2], vec4(0.0, 0.0, 0.0, 1.0)))*position;
}
*/

/* Expected output: geometry
layout(triangles) in;
layout(triangles, max_vertices=3) out;
in vec2 _vs_out_texcoord[];
out vec2 _gs_out_texcoord;
void main()
{
	for(int i = 0; i<3; ++i)
	{
		gl_Position = gl_in[i].gl_Position;
		_gs_out_texcoord = _vs_out_texcoord[i];
		EmitVertex();
	}
}
*/

/* Expected output: fragment
uniform sampler2D tex;
layout(location=0) out vec4 frag_color;
in vec2 _gs_out_texcoord;
void main()
{
	frag_color = texture(tex, _gs_out_texcoord);
}
*/