diff options
Diffstat (limited to 'modules/avatar/identicon/block.go')
| -rw-r--r-- | modules/avatar/identicon/block.go | 717 |
1 files changed, 717 insertions, 0 deletions
diff --git a/modules/avatar/identicon/block.go b/modules/avatar/identicon/block.go new file mode 100644 index 0000000..cb1803a --- /dev/null +++ b/modules/avatar/identicon/block.go @@ -0,0 +1,717 @@ +// Copyright 2021 The Gitea Authors. All rights reserved. +// SPDX-License-Identifier: MIT + +// 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, angle int) + +// draw a polygon by points, and the polygon is rotated by angle. +func drawBlock(img *image.Paletted, x, y, size, 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, angle int) {} + +// full-filled +// +// -------- +// |######| +// |######| +// |######| +// -------- +func b1(img *image.Paletted, x, y, size, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, + }) +} |