protot/3rdparty/bgfx/examples/common/imgui/fs_imgui_image_swizz.sc

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2016-08-29 22:31:11 +02:00
$input v_texcoord0
/*
* Copyright 2014 Dario Manesku. All rights reserved.
* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
*/
#include <bgfx_shader.sh>
uniform vec4 u_imageLodEnabled;
uniform vec4 u_swizzle;
SAMPLER2D(s_texColor, 0);
#define u_imageLod u_imageLodEnabled.x
#define u_imageEnabled u_imageLodEnabled.y
void main()
{
float color = dot(texture2DLod(s_texColor, v_texcoord0, u_imageLod), u_swizzle);
float alpha = 0.2 + 0.8*u_imageEnabled;
gl_FragColor = vec4(vec3_splat(color), alpha);
}