66 lines
2.7 KiB
GLSL
66 lines
2.7 KiB
GLSL
/**
|
|
* Adaptation of SMAA (Enhanced Subpixel Morphological Antialiasing)
|
|
* for FlightGear.
|
|
* See http://www.iryoku.com/smaa/ for details.
|
|
* Licensed under the MIT license, see below.
|
|
*/
|
|
|
|
/**
|
|
* Copyright (C) 2013 Jorge Jimenez (jorge@iryoku.com)
|
|
* Copyright (C) 2013 Jose I. Echevarria (joseignacioechevarria@gmail.com)
|
|
* Copyright (C) 2013 Belen Masia (bmasia@unizar.es)
|
|
* Copyright (C) 2013 Fernando Navarro (fernandn@microsoft.com)
|
|
* Copyright (C) 2013 Diego Gutierrez (diegog@unizar.es)
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* this software and associated documentation files (the "Software"), to deal in
|
|
* the Software without restriction, including without limitation the rights to
|
|
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
|
|
* of the Software, and to permit persons to whom the Software is furnished to
|
|
* do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software. As clarification, there
|
|
* is no requirement that the copyright notice and permission be included in
|
|
* binary distributions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
|
|
#version 330 core
|
|
|
|
#define SMAA_MAX_SEARCH_STEPS 16
|
|
|
|
#define mad(a, b, c) (a * b + c)
|
|
|
|
out vec2 texCoord;
|
|
out vec2 pixCoord;
|
|
out vec4 vOffset[3];
|
|
|
|
uniform vec4 fg_Viewport;
|
|
|
|
#define SMAA_RT_METRICS vec4(1.0 / fg_Viewport.z, 1.0 / fg_Viewport.w, fg_Viewport.z, fg_Viewport.w)
|
|
|
|
void main()
|
|
{
|
|
vec2 pos = vec2(gl_VertexID % 2, gl_VertexID / 2) * 4.0 - 1.0;
|
|
texCoord = pos * 0.5 + 0.5;
|
|
gl_Position = vec4(pos, 0.0, 1.0);
|
|
|
|
pixCoord = texCoord * SMAA_RT_METRICS.zw;
|
|
|
|
// We will use these offsets for the searches later on (see @PSEUDO_GATHER4):
|
|
vOffset[0] = mad(SMAA_RT_METRICS.xyxy, vec4(-0.25, -0.125, 1.25, -0.125), texCoord.xyxy);
|
|
vOffset[1] = mad(SMAA_RT_METRICS.xyxy, vec4(-0.125,-0.25, -0.125, 1.25 ), texCoord.xyxy);
|
|
|
|
// And these for the searches, they indicate the ends of the loops:
|
|
vOffset[2] = mad(SMAA_RT_METRICS.xxyy,
|
|
vec4(-2.0, 2.0, -2.0, 2.0) * float(SMAA_MAX_SEARCH_STEPS),
|
|
vec4(vOffset[0].xz, vOffset[1].yw));
|
|
}
|