Forums - Arrays of structures are broken in GLSL

On Adreno 320 (Sony Xperia ZL, driver [email protected]), there's a bug with arrays of structures.

If you access a structure from an array with a variable index, all fields of the structure point to the first field.

Here's example code:

glUniform3f(glGetUniformLocation(p, "u_Colors[0].Color1"), 0.2f, 0.0f, 0.0f);

glUniform3f(glGetUniformLocation(p, "u_Colors[0].Color2"), 0.0f, 1.0f, 0.0f);

glUniform3f(glGetUniformLocation(p, "u_Colors[0].Color3"), 0.0f, 0.0f, 1.0f);

struct Colors { vec3 Color1, Color2, Color3; };

uniform Colors u_Colors[1];

void main() {

    vec3 color = vec3(0.0);

    for (int i = 0; i < 1; ++i)

        color += u_Colors[i].Color1 + u_Colors[i].Color2 + u_Colors[i].Color3;

    gl_FragColor = vec4(color, 1.0);

}

This should produce light-cyan-colored pixels (0.2, 1.0, 1.0). However, it gives (0.6, 0.0, 0.0), because Color1, Color2 and Color3 point to Color1.

It works correctly if you index the array with a constant number, however.