45 lines
1.1 KiB
Plaintext
45 lines
1.1 KiB
Plaintext
|
// VERTEX_SHADER:
|
||
|
|
// repeat.glsl
|
||
|
|
|
||
|
|
void main() {
|
||
|
|
gl_Position = u_projection * u_modelview * vec4(aPosition, 0.0, 1.0);
|
||
|
|
|
||
|
|
vUv = vec2(aUv.x, aUv.y);
|
||
|
|
}
|
||
|
|
|
||
|
|
// FRAGMENT_SHADER:
|
||
|
|
// repeat.glsl
|
||
|
|
|
||
|
|
uniform vec4 u_child_bounds;
|
||
|
|
uniform vec4 u_texture_rect;
|
||
|
|
|
||
|
|
float wrap(float f, float wrap_for) {
|
||
|
|
return mod(f, wrap_for);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* We get the texture coordinates via vUv,
|
||
|
|
* but that might be on a texture atlas, so we need to do the
|
||
|
|
* wrapping ourselves.
|
||
|
|
*/
|
||
|
|
void main() {
|
||
|
|
|
||
|
|
/* We map the texture coordinate to [1;0], then wrap it and scale the result again */
|
||
|
|
|
||
|
|
float tw = u_texture_rect.z - u_texture_rect.x;
|
||
|
|
float th = u_texture_rect.w - u_texture_rect.y;
|
||
|
|
|
||
|
|
float mapped_x = (vUv.x - u_texture_rect.x) / tw;
|
||
|
|
float mapped_y = (vUv.y - u_texture_rect.y) / th;
|
||
|
|
|
||
|
|
float wrapped_x = wrap(u_child_bounds.x + mapped_x * u_child_bounds.z, 1.0);
|
||
|
|
float wrapped_y = wrap(u_child_bounds.y + mapped_y * u_child_bounds.w, 1.0);
|
||
|
|
|
||
|
|
vec2 tp;
|
||
|
|
tp.x = u_texture_rect.x + (wrapped_x * tw);
|
||
|
|
tp.y = u_texture_rect.y + (wrapped_y * th);
|
||
|
|
|
||
|
|
vec4 diffuse = GskTexture(u_source, tp);
|
||
|
|
|
||
|
|
gskSetScaledOutputColor(diffuse, u_alpha);
|
||
|
|
}
|