# Test generated by:
# ../../../glsl-1.10/variable-index-read.sh 1.10

[require]
GLSL >= 1.10

[vertex shader]
#version 110
uniform int index;
uniform int col;
uniform int row;
uniform float expect;
varying mat4 m[3];
varying vec4 color;

void main()
{
    gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;

    m[0] = mat4(1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0, 13.0, 14.0, 15.0, 16.0);
    m[1] = mat4(17.0, 18.0, 19.0, 20.0, 21.0, 22.0, 23.0, 24.0, 25.0, 26.0, 27.0, 28.0, 29.0, 30.0, 31.0, 32.0);
    m[2] = mat4(33.0, 34.0, 35.0, 36.0, 37.0, 38.0, 39.0, 40.0, 41.0, 42.0, 43.0, 44.0, 45.0, 46.0, 47.0, 48.0);

    /* From page 23 (page 30 of the PDF) of the GLSL 1.10 spec:
     *
     *     "A vertex shader may also read varying variables, getting back the
     *     same values it has written. Reading a varying variable in a vertex
     *     shader returns undefined values if it is read before being
     *     written."
     */
    color = (m[index][col][row] == expect)
        ? vec4(0.0, 1.0, 0.0, 1.0) : vec4(1.0, 0.0, 0.0, 1.0);
}

[fragment shader]
#version 110
uniform int index;
uniform int col;
uniform int row;
uniform float expect;
varying mat4 m[3];
varying vec4 color;

void main()
{
    /* There is some trickery here.  The fragment shader has to actually use
     * the varyings generated by the vertex shader, or the compiler (more
     * likely the linker) might demote the varying outputs to just be vertex
     * shader global variables.  Since the point of the test is the vertex
     * shader reading from a varying, that would defeat the test.
     */
    gl_FragColor = (m[index][col][row] == expect)
        ? color : vec4(1.0, 0.0, 0.0, 1.0);
}

[test]
clear color 0.5 0.5 0.5 0.5
clear
ortho

uniform int index 0
uniform int col 0
uniform int row 0
uniform float expect 1
draw rect 5 5 10 10
probe rgb 10 10 0.0 1.0 0.0

uniform int row 1
uniform float expect 2
draw rect 5 20 10 10
probe rgb 10 25 0.0 1.0 0.0

uniform int row 2
uniform float expect 3
draw rect 5 35 10 10
probe rgb 10 40 0.0 1.0 0.0

uniform int row 3
uniform float expect 4
draw rect 5 50 10 10
probe rgb 10 55 0.0 1.0 0.0

uniform int col 1
uniform int row 0
uniform float expect 5
draw rect 20 5 10 10
probe rgb 25 10 0.0 1.0 0.0

uniform int row 1
uniform float expect 6
draw rect 20 20 10 10
probe rgb 25 25 0.0 1.0 0.0

uniform int row 2
uniform float expect 7
draw rect 20 35 10 10
probe rgb 25 40 0.0 1.0 0.0

uniform int row 3
uniform float expect 8
draw rect 20 50 10 10
probe rgb 25 55 0.0 1.0 0.0

uniform int col 2
uniform int row 0
uniform float expect 9
draw rect 35 5 10 10
probe rgb 40 10 0.0 1.0 0.0

uniform int row 1
uniform float expect 10
draw rect 35 20 10 10
probe rgb 40 25 0.0 1.0 0.0

uniform int row 2
uniform float expect 11
draw rect 35 35 10 10
probe rgb 40 40 0.0 1.0 0.0

uniform int row 3
uniform float expect 12
draw rect 35 50 10 10
probe rgb 40 55 0.0 1.0 0.0

uniform int col 3
uniform int row 0
uniform float expect 13
draw rect 50 5 10 10
probe rgb 55 10 0.0 1.0 0.0

uniform int row 1
uniform float expect 14
draw rect 50 20 10 10
probe rgb 55 25 0.0 1.0 0.0

uniform int row 2
uniform float expect 15
draw rect 50 35 10 10
probe rgb 55 40 0.0 1.0 0.0

uniform int row 3
uniform float expect 16
draw rect 50 50 10 10
probe rgb 55 55 0.0 1.0 0.0

uniform int index 1
uniform int col 0
uniform int row 0
uniform float expect 17
draw rect 75 5 10 10
probe rgb 80 10 0.0 1.0 0.0

uniform int row 1
uniform float expect 18
draw rect 75 20 10 10
probe rgb 80 25 0.0 1.0 0.0

uniform int row 2
uniform float expect 19
draw rect 75 35 10 10
probe rgb 80 40 0.0 1.0 0.0

uniform int row 3
uniform float expect 20
draw rect 75 50 10 10
probe rgb 80 55 0.0 1.0 0.0

uniform int col 1
uniform int row 0
uniform float expect 21
draw rect 90 5 10 10
probe rgb 95 10 0.0 1.0 0.0

uniform int row 1
uniform float expect 22
draw rect 90 20 10 10
probe rgb 95 25 0.0 1.0 0.0

uniform int row 2
uniform float expect 23
draw rect 90 35 10 10
probe rgb 95 40 0.0 1.0 0.0

uniform int row 3
uniform float expect 24
draw rect 90 50 10 10
probe rgb 95 55 0.0 1.0 0.0

uniform int col 2
uniform int row 0
uniform float expect 25
draw rect 105 5 10 10
probe rgb 110 10 0.0 1.0 0.0

uniform int row 1
uniform float expect 26
draw rect 105 20 10 10
probe rgb 110 25 0.0 1.0 0.0

uniform int row 2
uniform float expect 27
draw rect 105 35 10 10
probe rgb 110 40 0.0 1.0 0.0

uniform int row 3
uniform float expect 28
draw rect 105 50 10 10
probe rgb 110 55 0.0 1.0 0.0

uniform int col 3
uniform int row 0
uniform float expect 29
draw rect 120 5 10 10
probe rgb 125 10 0.0 1.0 0.0

uniform int row 1
uniform float expect 30
draw rect 120 20 10 10
probe rgb 125 25 0.0 1.0 0.0

uniform int row 2
uniform float expect 31
draw rect 120 35 10 10
probe rgb 125 40 0.0 1.0 0.0

uniform int row 3
uniform float expect 32
draw rect 120 50 10 10
probe rgb 125 55 0.0 1.0 0.0

uniform int index 2
uniform int col 0
uniform int row 0
uniform float expect 33
draw rect 145 5 10 10
probe rgb 150 10 0.0 1.0 0.0

uniform int row 1
uniform float expect 34
draw rect 145 20 10 10
probe rgb 150 25 0.0 1.0 0.0

uniform int row 2
uniform float expect 35
draw rect 145 35 10 10
probe rgb 150 40 0.0 1.0 0.0

uniform int row 3
uniform float expect 36
draw rect 145 50 10 10
probe rgb 150 55 0.0 1.0 0.0

uniform int col 1
uniform int row 0
uniform float expect 37
draw rect 160 5 10 10
probe rgb 165 10 0.0 1.0 0.0

uniform int row 1
uniform float expect 38
draw rect 160 20 10 10
probe rgb 165 25 0.0 1.0 0.0

uniform int row 2
uniform float expect 39
draw rect 160 35 10 10
probe rgb 165 40 0.0 1.0 0.0

uniform int row 3
uniform float expect 40
draw rect 160 50 10 10
probe rgb 165 55 0.0 1.0 0.0

uniform int col 2
uniform int row 0
uniform float expect 41
draw rect 175 5 10 10
probe rgb 180 10 0.0 1.0 0.0

uniform int row 1
uniform float expect 42
draw rect 175 20 10 10
probe rgb 180 25 0.0 1.0 0.0

uniform int row 2
uniform float expect 43
draw rect 175 35 10 10
probe rgb 180 40 0.0 1.0 0.0

uniform int row 3
uniform float expect 44
draw rect 175 50 10 10
probe rgb 180 55 0.0 1.0 0.0

uniform int col 3
uniform int row 0
uniform float expect 45
draw rect 190 5 10 10
probe rgb 195 10 0.0 1.0 0.0

uniform int row 1
uniform float expect 46
draw rect 190 20 10 10
probe rgb 195 25 0.0 1.0 0.0

uniform int row 2
uniform float expect 47
draw rect 190 35 10 10
probe rgb 195 40 0.0 1.0 0.0

uniform int row 3
uniform float expect 48
draw rect 190 50 10 10
probe rgb 195 55 0.0 1.0 0.0