mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-11-22 21:35:35 +03:00
a8fd76557b
This PR fixes the builtin avatar generator. 1. The random background color makes some images very dirty. So now we only use white background for avatars. 2. We use left-right mirror avatars to satisfy #14799 3. Fix a small padding error in the algorithm
717 lines
10 KiB
Go
717 lines
10 KiB
Go
// Copyright 2021 The Gitea Authors. All rights reserved.
|
|
// Use of this source code is governed by a MIT-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// Copied and modified from https://github.com/issue9/identicon/ (MIT License)
|
|
|
|
package identicon
|
|
|
|
import "image"
|
|
|
|
var (
|
|
// the blocks can appear in center, these blocks can be more beautiful
|
|
centerBlocks = []blockFunc{b0, b1, b2, b3, b19, b26, b27}
|
|
|
|
// all blocks
|
|
blocks = []blockFunc{b0, b1, b2, b3, b4, b5, b6, b7, b8, b9, b10, b11, b12, b13, b14, b15, b16, b17, b18, b19, b20, b21, b22, b23, b24, b25, b26, b27}
|
|
)
|
|
|
|
type blockFunc func(img *image.Paletted, x, y, size int, angle int)
|
|
|
|
// draw a polygon by points, and the polygon is rotated by angle.
|
|
func drawBlock(img *image.Paletted, x, y, size int, angle int, points []int) {
|
|
if angle != 0 {
|
|
m := size / 2
|
|
rotate(points, m, m, angle)
|
|
}
|
|
|
|
for i := 0; i < size; i++ {
|
|
for j := 0; j < size; j++ {
|
|
if pointInPolygon(i, j, points) {
|
|
img.SetColorIndex(x+i, y+j, 1)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// blank
|
|
//
|
|
// --------
|
|
// | |
|
|
// | |
|
|
// | |
|
|
// --------
|
|
func b0(img *image.Paletted, x, y, size int, angle int) {}
|
|
|
|
// full-filled
|
|
//
|
|
// --------
|
|
// |######|
|
|
// |######|
|
|
// |######|
|
|
// --------
|
|
func b1(img *image.Paletted, x, y, size int, angle int) {
|
|
for i := x; i < x+size; i++ {
|
|
for j := y; j < y+size; j++ {
|
|
img.SetColorIndex(i, j, 1)
|
|
}
|
|
}
|
|
}
|
|
|
|
// a small block
|
|
// ----------
|
|
// | |
|
|
// | #### |
|
|
// | #### |
|
|
// | |
|
|
// ----------
|
|
func b2(img *image.Paletted, x, y, size int, angle int) {
|
|
l := size / 4
|
|
x += l
|
|
y += l
|
|
|
|
for i := x; i < x+2*l; i++ {
|
|
for j := y; j < y+2*l; j++ {
|
|
img.SetColorIndex(i, j, 1)
|
|
}
|
|
}
|
|
}
|
|
|
|
// diamond
|
|
//
|
|
// ---------
|
|
// | # |
|
|
// | ### |
|
|
// | ##### |
|
|
// |#######|
|
|
// | ##### |
|
|
// | ### |
|
|
// | # |
|
|
// ---------
|
|
func b3(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
drawBlock(img, x, y, size, 0, []int{
|
|
m, 0,
|
|
size, m,
|
|
m, size,
|
|
0, m,
|
|
m, 0,
|
|
})
|
|
}
|
|
|
|
// b4
|
|
//
|
|
// -------
|
|
// |#####|
|
|
// |#### |
|
|
// |### |
|
|
// |## |
|
|
// |# |
|
|
// |------
|
|
func b4(img *image.Paletted, x, y, size int, angle int) {
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
0, 0,
|
|
size, 0,
|
|
0, size,
|
|
0, 0,
|
|
})
|
|
}
|
|
|
|
// b5
|
|
//
|
|
// ---------
|
|
// | # |
|
|
// | ### |
|
|
// | ##### |
|
|
// |#######|
|
|
func b5(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
m, 0,
|
|
size, size,
|
|
0, size,
|
|
m, 0,
|
|
})
|
|
}
|
|
|
|
// b6
|
|
//
|
|
// --------
|
|
// |### |
|
|
// |### |
|
|
// |### |
|
|
// --------
|
|
func b6(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
0, 0,
|
|
m, 0,
|
|
m, size,
|
|
0, size,
|
|
0, 0,
|
|
})
|
|
}
|
|
|
|
// b7 italic cone
|
|
//
|
|
// ---------
|
|
// | # |
|
|
// | ## |
|
|
// | #####|
|
|
// | ####|
|
|
// |--------
|
|
func b7(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
0, 0,
|
|
size, m,
|
|
size, size,
|
|
m, size,
|
|
0, 0,
|
|
})
|
|
}
|
|
|
|
// b8 three small triangles
|
|
//
|
|
// -----------
|
|
// | # |
|
|
// | ### |
|
|
// | ##### |
|
|
// | # # |
|
|
// | ### ### |
|
|
// |#########|
|
|
// -----------
|
|
func b8(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
mm := m / 2
|
|
|
|
// top
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
m, 0,
|
|
3 * mm, m,
|
|
mm, m,
|
|
m, 0,
|
|
})
|
|
|
|
// bottom left
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
mm, m,
|
|
m, size,
|
|
0, size,
|
|
mm, m,
|
|
})
|
|
|
|
// bottom right
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
3 * mm, m,
|
|
size, size,
|
|
m, size,
|
|
3 * mm, m,
|
|
})
|
|
}
|
|
|
|
// b9 italic triangle
|
|
//
|
|
// ---------
|
|
// |# |
|
|
// | #### |
|
|
// | #####|
|
|
// | #### |
|
|
// | # |
|
|
// ---------
|
|
func b9(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
0, 0,
|
|
size, m,
|
|
m, size,
|
|
0, 0,
|
|
})
|
|
}
|
|
|
|
// b10
|
|
//
|
|
// ----------
|
|
// | ####|
|
|
// | ### |
|
|
// | ## |
|
|
// | # |
|
|
// |#### |
|
|
// |### |
|
|
// |## |
|
|
// |# |
|
|
// ----------
|
|
func b10(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
m, 0,
|
|
size, 0,
|
|
m, m,
|
|
m, 0,
|
|
})
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
0, m,
|
|
m, m,
|
|
0, size,
|
|
0, m,
|
|
})
|
|
}
|
|
|
|
// b11
|
|
//
|
|
// ----------
|
|
// |#### |
|
|
// |#### |
|
|
// |#### |
|
|
// | |
|
|
// | |
|
|
// ----------
|
|
func b11(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
0, 0,
|
|
m, 0,
|
|
m, m,
|
|
0, m,
|
|
0, 0,
|
|
})
|
|
}
|
|
|
|
// b12
|
|
//
|
|
// -----------
|
|
// | |
|
|
// | |
|
|
// |#########|
|
|
// | ##### |
|
|
// | # |
|
|
// -----------
|
|
func b12(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
0, m,
|
|
size, m,
|
|
m, size,
|
|
0, m,
|
|
})
|
|
}
|
|
|
|
// b13
|
|
//
|
|
// -----------
|
|
// | |
|
|
// | |
|
|
// | # |
|
|
// | ##### |
|
|
// |#########|
|
|
// -----------
|
|
func b13(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
m, m,
|
|
size, size,
|
|
0, size,
|
|
m, m,
|
|
})
|
|
}
|
|
|
|
// b14
|
|
//
|
|
// ---------
|
|
// | # |
|
|
// | ### |
|
|
// |#### |
|
|
// | |
|
|
// | |
|
|
// ---------
|
|
func b14(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
m, 0,
|
|
m, m,
|
|
0, m,
|
|
m, 0,
|
|
})
|
|
}
|
|
|
|
// b15
|
|
//
|
|
// ----------
|
|
// |##### |
|
|
// |### |
|
|
// |# |
|
|
// | |
|
|
// | |
|
|
// ----------
|
|
func b15(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
0, 0,
|
|
m, 0,
|
|
0, m,
|
|
0, 0,
|
|
})
|
|
}
|
|
|
|
// b16
|
|
//
|
|
// ---------
|
|
// | # |
|
|
// | ##### |
|
|
// |#######|
|
|
// | # |
|
|
// | ##### |
|
|
// |#######|
|
|
// ---------
|
|
func b16(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
m, 0,
|
|
size, m,
|
|
0, m,
|
|
m, 0,
|
|
})
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
m, m,
|
|
size, size,
|
|
0, size,
|
|
m, m,
|
|
})
|
|
}
|
|
|
|
// b17
|
|
//
|
|
// ----------
|
|
// |##### |
|
|
// |### |
|
|
// |# |
|
|
// | ##|
|
|
// | ##|
|
|
// ----------
|
|
func b17(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
0, 0,
|
|
m, 0,
|
|
0, m,
|
|
0, 0,
|
|
})
|
|
|
|
quarter := size / 4
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
size - quarter, size - quarter,
|
|
size, size - quarter,
|
|
size, size,
|
|
size - quarter, size,
|
|
size - quarter, size - quarter,
|
|
})
|
|
}
|
|
|
|
// b18
|
|
//
|
|
// ----------
|
|
// |##### |
|
|
// |#### |
|
|
// |### |
|
|
// |## |
|
|
// |# |
|
|
// ----------
|
|
func b18(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
0, 0,
|
|
m, 0,
|
|
0, size,
|
|
0, 0,
|
|
})
|
|
}
|
|
|
|
// b19
|
|
//
|
|
// ----------
|
|
// |########|
|
|
// |### ###|
|
|
// |# #|
|
|
// |### ###|
|
|
// |########|
|
|
// ----------
|
|
func b19(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
0, 0,
|
|
m, 0,
|
|
0, m,
|
|
0, 0,
|
|
})
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
m, 0,
|
|
size, 0,
|
|
size, m,
|
|
m, 0,
|
|
})
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
size, m,
|
|
size, size,
|
|
m, size,
|
|
size, m,
|
|
})
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
0, m,
|
|
m, size,
|
|
0, size,
|
|
0, m,
|
|
})
|
|
}
|
|
|
|
// b20
|
|
//
|
|
// ----------
|
|
// | ## |
|
|
// |### |
|
|
// |## |
|
|
// |## |
|
|
// |# |
|
|
// ----------
|
|
func b20(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
q := size / 4
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
q, 0,
|
|
0, size,
|
|
0, m,
|
|
q, 0,
|
|
})
|
|
}
|
|
|
|
// b21
|
|
//
|
|
// ----------
|
|
// | #### |
|
|
// |## #####|
|
|
// |## ##|
|
|
// |## |
|
|
// |# |
|
|
// ----------
|
|
func b21(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
q := size / 4
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
q, 0,
|
|
0, size,
|
|
0, m,
|
|
q, 0,
|
|
})
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
q, 0,
|
|
size, q,
|
|
size, m,
|
|
q, 0,
|
|
})
|
|
}
|
|
|
|
// b22
|
|
//
|
|
// ----------
|
|
// | #### |
|
|
// |## ### |
|
|
// |## ##|
|
|
// |## ##|
|
|
// |# #|
|
|
// ----------
|
|
func b22(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
q := size / 4
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
q, 0,
|
|
0, size,
|
|
0, m,
|
|
q, 0,
|
|
})
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
q, 0,
|
|
size, q,
|
|
size, size,
|
|
q, 0,
|
|
})
|
|
}
|
|
|
|
// b23
|
|
//
|
|
// ----------
|
|
// | #######|
|
|
// |### #|
|
|
// |## |
|
|
// |## |
|
|
// |# |
|
|
// ----------
|
|
func b23(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
q := size / 4
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
q, 0,
|
|
0, size,
|
|
0, m,
|
|
q, 0,
|
|
})
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
q, 0,
|
|
size, 0,
|
|
size, q,
|
|
q, 0,
|
|
})
|
|
}
|
|
|
|
// b24
|
|
//
|
|
// ----------
|
|
// | ## ###|
|
|
// |### ###|
|
|
// |## ## |
|
|
// |## ## |
|
|
// |# # |
|
|
// ----------
|
|
func b24(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
q := size / 4
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
q, 0,
|
|
0, size,
|
|
0, m,
|
|
q, 0,
|
|
})
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
m, 0,
|
|
size, 0,
|
|
m, size,
|
|
m, 0,
|
|
})
|
|
}
|
|
|
|
// b25
|
|
//
|
|
// ----------
|
|
// |# #|
|
|
// |## ###|
|
|
// |## ## |
|
|
// |###### |
|
|
// |#### |
|
|
// ----------
|
|
func b25(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
q := size / 4
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
0, 0,
|
|
0, size,
|
|
q, size,
|
|
0, 0,
|
|
})
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
0, m,
|
|
size, 0,
|
|
q, size,
|
|
0, m,
|
|
})
|
|
}
|
|
|
|
// b26
|
|
//
|
|
// ----------
|
|
// |# #|
|
|
// |### ###|
|
|
// | #### |
|
|
// |### ###|
|
|
// |# #|
|
|
// ----------
|
|
func b26(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
q := size / 4
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
0, 0,
|
|
m, q,
|
|
q, m,
|
|
0, 0,
|
|
})
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
size, 0,
|
|
m + q, m,
|
|
m, q,
|
|
size, 0,
|
|
})
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
size, size,
|
|
m, m + q,
|
|
q + m, m,
|
|
size, size,
|
|
})
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
0, size,
|
|
q, m,
|
|
m, q + m,
|
|
0, size,
|
|
})
|
|
}
|
|
|
|
// b27
|
|
//
|
|
// ----------
|
|
// |########|
|
|
// |## ###|
|
|
// |# #|
|
|
// |### ##|
|
|
// |########|
|
|
// ----------
|
|
func b27(img *image.Paletted, x, y, size int, angle int) {
|
|
m := size / 2
|
|
q := size / 4
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
0, 0,
|
|
size, 0,
|
|
0, q,
|
|
0, 0,
|
|
})
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
q + m, 0,
|
|
size, 0,
|
|
size, size,
|
|
q + m, 0,
|
|
})
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
size, q + m,
|
|
size, size,
|
|
0, size,
|
|
size, q + m,
|
|
})
|
|
|
|
drawBlock(img, x, y, size, angle, []int{
|
|
0, size,
|
|
0, 0,
|
|
q, size,
|
|
0, size,
|
|
})
|
|
}
|