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Use the fact that GLSL supports multiple dispatch based on argument types

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Kovid Goyal 2025-10-05 22:14:01 +05:30
parent e21d2f5191
commit da39257020
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1 changed files with 6 additions and 5 deletions
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11
kitty/cell_vertex.glsl
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@ -76,17 +76,18 @@ vec3 color_to_vec(uint c) {
return vec3(gamma_lut[r], gamma_lut[g], gamma_lut[b]);
}
#define one_if_equal_zero_otherwise(a, b) (1.0f - zero_or_one(abs(float(a) - float(b))))
float one_if_equal_zero_otherwise(float a, float b) { return (1.0f - zero_or_one(abs(float(a) - float(b)))); }
// Wee need an integer variant to accommodate GPU driver bugs, see
// https://github.com/kovidgoyal/kitty/issues/9072
#define one_if_equal_zero_otherwise_integer(a, b) (1u - uint(zero_or_one(abs(float(a) - float(b)))))
uint one_if_equal_zero_otherwise(int a, int b) { return (1u - uint(zero_or_one(abs(float(a) - float(b))))); }
uint one_if_equal_zero_otherwise(uint a, uint b) { return (1u - uint(zero_or_one(abs(float(a) - float(b))))); }
uint resolve_color(uint c, uint defval) {
// Convert a cell color to an actual color based on the color table
int t = int(c & BYTE_MASK);
uint is_one = one_if_equal_zero_otherwise_integer(t, 1);
uint is_two = one_if_equal_zero_otherwise_integer(t, 2);
uint is_one = one_if_equal_zero_otherwise(t, 1);
uint is_two = one_if_equal_zero_otherwise(t, 2);
uint is_neither_one_nor_two = 1u - is_one - is_two;
return is_one * color_table[(c >> 8) & BYTE_MASK] + is_two * (c >> 8) + is_neither_one_nor_two * defval;
}
@ -191,7 +192,7 @@ uvec2 get_decorations_indices(uint in_url /* [0, 1] */, uint text_attrs) {
uint is_cursor(uint x, uint y) {
uint clamped_x = clamp(x, cursor_x1, cursor_x2);
uint clamped_y = clamp(y, cursor_y1, cursor_y2);
return one_if_equal_zero_otherwise_integer(x, clamped_x) * one_if_equal_zero_otherwise_integer(y, clamped_y);
return one_if_equal_zero_otherwise(x, clamped_x) * one_if_equal_zero_otherwise(y, clamped_y);
}
// }}}