1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
/* -*- c -*- */
#version 330
// must match VBO_location_line in GL_image_display.c
layout (location = 1) in vec2 vertex;
uniform vec2 aspect;
uniform vec2 center01;
uniform float visible_width01;
uniform int image_width_full, image_height_full;
uniform int flip_x, flip_y;
void main(void)
{
// This is just like image.vertex.glsl: I map image pixel coordinates
// convert pixel coords to [0,1] coords in the image
vec2 v01 = (vertex + 0.5) / vec2(int(image_width_full),int(image_height_full));
if(flip_x != 0)
v01.x = 1.0 - v01.x;
if(flip_y == 0)
v01.y = 1.0 - v01.y;
gl_Position = vec4( (v01 - center01) / visible_width01 * 2.,
0, 1 );
gl_Position.x *= aspect.x;
gl_Position.y *= aspect.y;
}
|
