//////////////////////////////////////////////////////////////////////////////

#ifdef VERTEX

layout (location = 0) in vec2 a_pos;
layout (location = 1) in vec2 a_texcoord;

out vec2 v_texcoord;

uniform mat4 u_proj;
uniform mat4 u_model;

void main()
{
	gl_Position = u_proj * u_model * vec4(a_pos, 0.0f, 1.0f);
	v_texcoord = a_texcoord;
}

#endif

//////////////////////////////////////////////////////////////////////////////

#ifdef FRAGMENT

in vec2 v_texcoord;
out vec4 f_color;

uniform sampler2D u_texture;
uniform vec3 u_color;

void main()
{
	// 8-bit value is stored in Red value; interpret as alpha for blending
	vec4 value = vec4(1.0f, 1.0f, 1.0f, texture(u_texture, v_texcoord).r);
	f_color = vec4(u_color, 1.0f) * value;
}

#endif

//////////////////////////////////////////////////////////////////////////////