diff options
Diffstat (limited to 'modules/identicon/block.go')
| -rw-r--r-- | modules/identicon/block.go | 405 |
1 files changed, 405 insertions, 0 deletions
diff --git a/modules/identicon/block.go b/modules/identicon/block.go new file mode 100644 index 0000000000..f8a6c6a341 --- /dev/null +++ b/modules/identicon/block.go @@ -0,0 +1,405 @@ +// Copyright 2015 by caixw, All rights reserved +// Use of this source code is governed by a MIT +// license that can be found in the LICENSE file. + +package identicon + +import ( + "image" +) + +var ( + // 可以出现在中间的方块，一般为了美观，都是对称图像。 + centerBlocks = []blockFunc{b0, b1, b2, b3} + + // 所有方块 + blocks = []blockFunc{b0, b1, b2, b3, b4, b5, b6, b7, b8, b9, b10, b11, b12, b13, b14, b15, b16} +) + +// 所有block函数的类型 +type blockFunc func(img *image.Paletted, x, y, size float64, angle int) + +// 将多边形points旋转angle个角度，然后输出到img上，起点为x,y坐标 +func drawBlock(img *image.Paletted, x, y, size float64, angle int, points []float64) { + if angle > 0 { // 0角度不需要转换 + // 中心坐标与x,y的距离，方便下面指定中心坐标(x+m,y+m)， + // 0.5的偏移值不能少，否则坐靠右，非正中央 + m := size/2 - 0.5 + rotate(points, x+m, y+m, angle) + } + + for i := x; i < x+size; i++ { + for j := y; j < y+size; j++ { + if pointInPolygon(i, j, points) { + img.SetColorIndex(int(i), int(j), 1) + } + } + } +} + +// 全空白 +// +// -------- +// | | +// | | +// | | +// -------- +func b0(img *image.Paletted, x, y, size float64, angle int) { +} + +// 全填充正方形 +// +// -------- +// |######| +// |######| +// |######| +// -------- +func b1(img *image.Paletted, x, y, size float64, angle int) { + isize := int(size) + ix := int(x) + iy := int(y) + for i := ix + 1; i < ix+isize; i++ { + for j := iy + 1; j < iy+isize; j++ { + img.SetColorIndex(i, j, 1) + } + } +} + +// 中间小方块 +// ---------- +// | | +// | #### | +// | #### | +// | | +// ---------- +func b2(img *image.Paletted, x, y, size float64, angle int) { + l := size / 4 + x = x + l + y = y + l + + for i := x; i < x+2*l; i++ { + for j := y; j < y+2*l; j++ { + img.SetColorIndex(int(i), int(j), 1) + } + } +} + +// 菱形 +// +// --------- +// | # | +// | ### | +// | ##### | +// |#######| +// | ##### | +// | ### | +// | # | +// --------- +func b3(img *image.Paletted, x, y, size float64, angle int) { + m := size / 2 + points := []float64{} + + drawBlock(img, x, y, size, 0, append(points, + x+m, y, + x+size, y+m, + x+m, y+size, + x, y+m, + x+m, y, + )) +} + +// b4 +// +// ------- +// |#####| +// |#### | +// |### | +// |## | +// |# | +// |------ +func b4(img *image.Paletted, x, y, size float64, angle int) { + points := []float64{} + drawBlock(img, x, y, size, angle, append(points, + x, y, + x+size, y, + x, y+size, + x, y, + )) +} + +// b5 +// +// --------- +// | # | +// | ### | +// | ##### | +// |#######| +func b5(img *image.Paletted, x, y, size float64, angle int) { + points := []float64{} + m := size / 2 + drawBlock(img, x, y, size, angle, append(points, + x+m, y, + x+size, + y+size, + x, y+size, + x+m, y, + )) +} + +// b6 矩形 +// +// -------- +// |### | +// |### | +// |### | +// -------- +func b6(img *image.Paletted, x, y, size float64, angle int) { + points := []float64{} + m := size / 2 + drawBlock(img, x, y, size, angle, append(points, + x, y, + x+m, y, + x+m, y+size, + x, y+size, + x, y, + )) +} + +// b7 斜放的锥形 +// +// --------- +// | # | +// | ## | +// | #####| +// | ####| +// |-------- +func b7(img *image.Paletted, x, y, size float64, angle int) { + points := []float64{} + m := size / 2 + drawBlock(img, x, y, size, angle, append(points, + x, y, + x+size, y+m, + x+size, y+size, + x+m, y+size, + x, y, + )) +} + +// b8 三个堆叠的三角形 +// +// ----------- +// | # | +// | ### | +// | ##### | +// | # # | +// | ### ### | +// |#########| +// ----------- +func b8(img *image.Paletted, x, y, size float64, angle int) { + points := []float64{} + m := size / 2 + mm := m / 2 + + // 顶部三角形 + drawBlock(img, x, y, size, angle, append(points, + x+m, y, + x+3*mm, y+m, + x+mm, y+m, + x+m, y, + )) + + // 底下左边 + drawBlock(img, x, y, size, angle, append(points[:0], + x+mm, y+m, + x+m, y+size, + x, y+size, + x+mm, y+m, + )) + + // 底下右边 + drawBlock(img, x, y, size, angle, append(points[:0], + x+3*mm, y+m, + x+size, y+size, + x+m, y+size, + x+3*mm, y+m, + )) +} + +// b9 斜靠的三角形 +// +// --------- +// |# | +// | #### | +// | #####| +// | #### | +// | # | +// --------- +func b9(img *image.Paletted, x, y, size float64, angle int) { + points := []float64{} + m := size / 2 + drawBlock(img, x, y, size, angle, append(points, + x, y, + x+size, y+m, + x+m, y+size, + x, y, + )) +} + +// b10 +// +// ---------- +// | ####| +// | ### | +// | ## | +// | # | +// |#### | +// |### | +// |## | +// |# | +// ---------- +func b10(img *image.Paletted, x, y, size float64, angle int) { + points := []float64{} + m := size / 2 + drawBlock(img, x, y, size, angle, append(points, + x+m, y, + x+size, y, + x+m, y+m, + x+m, y, + )) + + drawBlock(img, x, y, size, angle, append(points[:0], + x, y+m, + x+m, y+m, + x, y+size, + x, y+m, + )) +} + +// b11 左上角1/4大小的方块 +// +// ---------- +// |#### | +// |#### | +// |#### | +// | | +// | | +// ---------- +func b11(img *image.Paletted, x, y, size float64, angle int) { + points := []float64{} + m := size / 2 + drawBlock(img, x, y, size, angle, append(points, + x, y, + x+m, y, + x+m, y+m, + x, y+m, + x, y, + )) +} + +// b12 +// +// ----------- +// | | +// | | +// |#########| +// | ##### | +// | # | +// ----------- +func b12(img *image.Paletted, x, y, size float64, angle int) { + points := []float64{} + m := size / 2 + drawBlock(img, x, y, size, angle, append(points, + x, y+m, + x+size, y+m, + x+m, y+size, + x, y+m, + )) +} + +// b13 +// +// ----------- +// | | +// | | +// | # | +// | ##### | +// |#########| +// ----------- +func b13(img *image.Paletted, x, y, size float64, angle int) { + points := []float64{} + m := size / 2 + drawBlock(img, x, y, size, angle, append(points, + x+m, y+m, + x+size, y+size, + x, y+size, + x+m, y+m, + )) +} + +// b14 +// +// --------- +// | # | +// | ### | +// |#### | +// | | +// | | +// --------- +func b14(img *image.Paletted, x, y, size float64, angle int) { + points := []float64{} + m := size / 2 + drawBlock(img, x, y, size, angle, append(points, + x+m, y, + x+m, y+m, + x, y+m, + x+m, y, + )) +} + +// b15 +// +// ---------- +// |##### | +// |### | +// |# | +// | | +// | | +// ---------- +func b15(img *image.Paletted, x, y, size float64, angle int) { + points := []float64{} + m := size / 2 + drawBlock(img, x, y, size, angle, append(points, + x, y, + x+m, y, + x, y+m, + x, y, + )) +} + +// b16 +// +// --------- +// | # | +// | ##### | +// |#######| +// | # | +// | ##### | +// |#######| +// --------- +func b16(img *image.Paletted, x, y, size float64, angle int) { + points := []float64{} + m := size / 2 + drawBlock(img, x, y, size, angle, append(points, + x+m, y, + x+size, y+m, + x, y+m, + x+m, y, + )) + + drawBlock(img, x, y, size, angle, append(points[:0], + x+m, y+m, + x+size, y+size, + x, y+size, + x+m, y+m, + )) +} |