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718 lines
10 KiB
Go
718 lines
10 KiB
Go
// Copyright 2021 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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// Copied and modified from https://github.com/issue9/identicon/ (MIT License)
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package identicon
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import "image"
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var (
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// the blocks can appear in center, these blocks can be more beautiful
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centerBlocks = []blockFunc{b0, b1, b2, b3, b19, b26, b27}
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// all blocks
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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}
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)
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type blockFunc func(img *image.Paletted, x, y, size, angle int)
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// draw a polygon by points, and the polygon is rotated by angle.
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func drawBlock(img *image.Paletted, x, y, size, angle int, points []int) {
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if angle != 0 {
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m := size / 2
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rotate(points, m, m, angle)
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}
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for i := 0; i < size; i++ {
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for j := 0; j < size; j++ {
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if pointInPolygon(i, j, points) {
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img.SetColorIndex(x+i, y+j, 1)
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}
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}
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}
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}
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// blank
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//
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// --------
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// | |
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// | |
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// | |
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// --------
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func b0(img *image.Paletted, x, y, size, angle int) {}
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// full-filled
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//
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// --------
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// |######|
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// |######|
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// |######|
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// --------
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func b1(img *image.Paletted, x, y, size, angle int) {
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for i := x; i < x+size; i++ {
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for j := y; j < y+size; j++ {
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img.SetColorIndex(i, j, 1)
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}
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}
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}
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// a small block
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// ----------
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// | |
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// | #### |
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// | #### |
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// | |
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// ----------
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func b2(img *image.Paletted, x, y, size, angle int) {
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l := size / 4
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x += l
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y += l
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for i := x; i < x+2*l; i++ {
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for j := y; j < y+2*l; j++ {
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img.SetColorIndex(i, j, 1)
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}
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}
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}
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// diamond
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//
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// ---------
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// | # |
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// | ### |
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// | ##### |
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// |#######|
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// | ##### |
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// | ### |
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// | # |
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// ---------
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func b3(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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drawBlock(img, x, y, size, 0, []int{
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m, 0,
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size, m,
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m, size,
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0, m,
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m, 0,
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})
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}
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// b4
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//
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// -------
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// |#####|
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// |#### |
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// |### |
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// |## |
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// |# |
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// |------
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func b4(img *image.Paletted, x, y, size, angle int) {
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drawBlock(img, x, y, size, angle, []int{
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0, 0,
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size, 0,
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0, size,
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0, 0,
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})
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}
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// b5
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//
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// ---------
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// | # |
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// | ### |
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// | ##### |
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// |#######|
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func b5(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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drawBlock(img, x, y, size, angle, []int{
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m, 0,
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size, size,
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0, size,
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m, 0,
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})
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}
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// b6
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//
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// --------
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// |### |
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// |### |
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// |### |
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// --------
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func b6(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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drawBlock(img, x, y, size, angle, []int{
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0, 0,
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m, 0,
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m, size,
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0, size,
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0, 0,
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})
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}
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// b7 italic cone
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//
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// ---------
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// | # |
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// | ## |
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// | #####|
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// | ####|
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// |--------
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func b7(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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drawBlock(img, x, y, size, angle, []int{
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0, 0,
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size, m,
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size, size,
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m, size,
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0, 0,
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})
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}
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// b8 three small triangles
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//
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// -----------
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// | # |
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// | ### |
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// | ##### |
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// | # # |
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// | ### ### |
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// |#########|
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// -----------
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func b8(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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mm := m / 2
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// top
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drawBlock(img, x, y, size, angle, []int{
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m, 0,
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3 * mm, m,
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mm, m,
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m, 0,
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})
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// bottom left
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drawBlock(img, x, y, size, angle, []int{
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mm, m,
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m, size,
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0, size,
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mm, m,
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})
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// bottom right
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drawBlock(img, x, y, size, angle, []int{
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3 * mm, m,
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size, size,
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m, size,
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3 * mm, m,
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})
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}
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// b9 italic triangle
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//
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// ---------
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// |# |
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// | #### |
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// | #####|
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// | #### |
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// | # |
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// ---------
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func b9(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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drawBlock(img, x, y, size, angle, []int{
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0, 0,
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size, m,
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m, size,
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0, 0,
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})
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}
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// b10
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//
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// ----------
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// | ####|
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// | ### |
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// | ## |
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// | # |
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// |#### |
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// |### |
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// |## |
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// |# |
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// ----------
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func b10(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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drawBlock(img, x, y, size, angle, []int{
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m, 0,
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size, 0,
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m, m,
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m, 0,
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})
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drawBlock(img, x, y, size, angle, []int{
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0, m,
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m, m,
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0, size,
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0, m,
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})
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}
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// b11
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//
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// ----------
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// |#### |
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// |#### |
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// |#### |
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// | |
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// | |
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// ----------
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func b11(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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drawBlock(img, x, y, size, angle, []int{
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0, 0,
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m, 0,
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m, m,
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0, m,
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0, 0,
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})
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}
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// b12
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//
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// -----------
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// | |
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// | |
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// |#########|
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// | ##### |
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// | # |
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// -----------
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func b12(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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drawBlock(img, x, y, size, angle, []int{
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0, m,
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size, m,
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m, size,
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0, m,
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})
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}
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// b13
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//
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// -----------
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// | |
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// | |
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// | # |
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// | ##### |
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// |#########|
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// -----------
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func b13(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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drawBlock(img, x, y, size, angle, []int{
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m, m,
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size, size,
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0, size,
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m, m,
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})
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}
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// b14
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//
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// ---------
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// | # |
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// | ### |
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// |#### |
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// | |
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// | |
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// ---------
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func b14(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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drawBlock(img, x, y, size, angle, []int{
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m, 0,
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m, m,
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0, m,
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m, 0,
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})
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}
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// b15
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//
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// ----------
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// |##### |
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// |### |
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// |# |
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// | |
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// | |
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// ----------
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func b15(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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drawBlock(img, x, y, size, angle, []int{
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0, 0,
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m, 0,
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0, m,
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0, 0,
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})
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}
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// b16
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//
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// ---------
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// | # |
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// | ##### |
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// |#######|
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// | # |
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// | ##### |
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// |#######|
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// ---------
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func b16(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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drawBlock(img, x, y, size, angle, []int{
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m, 0,
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size, m,
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0, m,
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m, 0,
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})
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drawBlock(img, x, y, size, angle, []int{
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m, m,
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size, size,
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0, size,
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m, m,
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})
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}
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// b17
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//
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// ----------
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// |##### |
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// |### |
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// |# |
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// | ##|
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// | ##|
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// ----------
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func b17(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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drawBlock(img, x, y, size, angle, []int{
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0, 0,
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m, 0,
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0, m,
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0, 0,
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})
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quarter := size / 4
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drawBlock(img, x, y, size, angle, []int{
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size - quarter, size - quarter,
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size, size - quarter,
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size, size,
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size - quarter, size,
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size - quarter, size - quarter,
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})
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}
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// b18
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//
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// ----------
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// |##### |
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// |#### |
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// |### |
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// |## |
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// |# |
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// ----------
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func b18(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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drawBlock(img, x, y, size, angle, []int{
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0, 0,
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m, 0,
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0, size,
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0, 0,
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})
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}
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// b19
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//
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// ----------
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// |########|
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// |### ###|
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// |# #|
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// |### ###|
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// |########|
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// ----------
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func b19(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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drawBlock(img, x, y, size, angle, []int{
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0, 0,
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m, 0,
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0, m,
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0, 0,
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})
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drawBlock(img, x, y, size, angle, []int{
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m, 0,
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size, 0,
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size, m,
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m, 0,
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})
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drawBlock(img, x, y, size, angle, []int{
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size, m,
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size, size,
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m, size,
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size, m,
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})
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drawBlock(img, x, y, size, angle, []int{
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0, m,
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m, size,
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0, size,
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0, m,
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})
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}
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// b20
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//
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// ----------
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// | ## |
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// |### |
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// |## |
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// |## |
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// |# |
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// ----------
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func b20(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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q := size / 4
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drawBlock(img, x, y, size, angle, []int{
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q, 0,
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0, size,
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0, m,
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q, 0,
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})
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}
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// b21
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//
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// ----------
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// | #### |
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// |## #####|
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// |## ##|
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// |## |
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// |# |
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// ----------
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func b21(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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q := size / 4
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drawBlock(img, x, y, size, angle, []int{
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q, 0,
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0, size,
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0, m,
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q, 0,
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})
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drawBlock(img, x, y, size, angle, []int{
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q, 0,
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size, q,
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size, m,
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q, 0,
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})
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}
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// b22
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//
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// ----------
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// | #### |
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// |## ### |
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// |## ##|
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// |## ##|
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// |# #|
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// ----------
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func b22(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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q := size / 4
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drawBlock(img, x, y, size, angle, []int{
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q, 0,
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0, size,
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0, m,
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q, 0,
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})
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drawBlock(img, x, y, size, angle, []int{
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q, 0,
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size, q,
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size, size,
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q, 0,
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})
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}
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// b23
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//
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// ----------
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// | #######|
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// |### #|
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// |## |
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// |## |
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// |# |
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// ----------
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func b23(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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q := size / 4
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drawBlock(img, x, y, size, angle, []int{
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q, 0,
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0, size,
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0, m,
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q, 0,
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})
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drawBlock(img, x, y, size, angle, []int{
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q, 0,
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size, 0,
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size, q,
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q, 0,
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})
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}
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// b24
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//
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// ----------
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// | ## ###|
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// |### ###|
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// |## ## |
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// |## ## |
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// |# # |
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// ----------
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func b24(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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q := size / 4
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drawBlock(img, x, y, size, angle, []int{
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q, 0,
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0, size,
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0, m,
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q, 0,
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})
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drawBlock(img, x, y, size, angle, []int{
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m, 0,
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size, 0,
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m, size,
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m, 0,
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})
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}
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// b25
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//
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// ----------
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// |# #|
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// |## ###|
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// |## ## |
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// |###### |
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// |#### |
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// ----------
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func b25(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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q := size / 4
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drawBlock(img, x, y, size, angle, []int{
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0, 0,
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0, size,
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q, size,
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0, 0,
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})
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drawBlock(img, x, y, size, angle, []int{
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0, m,
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size, 0,
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q, size,
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0, m,
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})
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}
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// b26
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//
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// ----------
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// |# #|
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// |### ###|
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// | #### |
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// |### ###|
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// |# #|
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// ----------
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func b26(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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q := size / 4
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drawBlock(img, x, y, size, angle, []int{
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0, 0,
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m, q,
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q, m,
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0, 0,
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})
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drawBlock(img, x, y, size, angle, []int{
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size, 0,
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m + q, m,
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m, q,
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size, 0,
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})
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drawBlock(img, x, y, size, angle, []int{
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size, size,
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m, m + q,
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q + m, m,
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size, size,
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})
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drawBlock(img, x, y, size, angle, []int{
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0, size,
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q, m,
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m, q + m,
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0, size,
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})
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}
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// b27
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//
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// ----------
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// |########|
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// |## ###|
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// |# #|
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// |### ##|
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// |########|
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// ----------
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func b27(img *image.Paletted, x, y, size, angle int) {
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m := size / 2
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q := size / 4
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drawBlock(img, x, y, size, angle, []int{
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0, 0,
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size, 0,
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0, q,
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0, 0,
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})
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drawBlock(img, x, y, size, angle, []int{
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q + m, 0,
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size, 0,
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size, size,
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q + m, 0,
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})
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drawBlock(img, x, y, size, angle, []int{
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size, q + m,
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size, size,
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0, size,
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size, q + m,
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})
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drawBlock(img, x, y, size, angle, []int{
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0, size,
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0, 0,
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q, size,
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0, size,
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})
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}
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