| 1 | package be.nikiroo.jvcard.tui; |
| 2 | |
| 3 | import java.awt.Graphics; |
| 4 | import java.awt.Image; |
| 5 | import java.awt.image.BufferedImage; |
| 6 | import java.awt.image.ImageObserver; |
| 7 | |
| 8 | import com.googlecode.lanterna.TerminalSize; |
| 9 | |
| 10 | public class ImageText { |
| 11 | private Image image; |
| 12 | private TerminalSize size; |
| 13 | private String text; |
| 14 | private boolean ready; |
| 15 | |
| 16 | public ImageText(Image image, TerminalSize size) { |
| 17 | setImage(image, size); |
| 18 | } |
| 19 | |
| 20 | public void setImage(Image image) { |
| 21 | setImage(image, size); |
| 22 | } |
| 23 | |
| 24 | public void setImage(TerminalSize size) { |
| 25 | setImage(image, size); |
| 26 | } |
| 27 | |
| 28 | public void setImage(Image image, TerminalSize size) { |
| 29 | this.text = null; |
| 30 | this.ready = false; |
| 31 | this.size = size; |
| 32 | if (image != null) { |
| 33 | this.image = image; |
| 34 | } |
| 35 | } |
| 36 | |
| 37 | public String getText() { |
| 38 | if (text == null) { |
| 39 | if (image == null) |
| 40 | return ""; |
| 41 | |
| 42 | int w = size.getColumns() * 2; |
| 43 | int h = size.getRows() * 2; |
| 44 | BufferedImage buff = new BufferedImage(w, h, |
| 45 | BufferedImage.TYPE_INT_ARGB); |
| 46 | Graphics gfx = buff.getGraphics(); |
| 47 | |
| 48 | TerminalSize srcSize = getSize(image); |
| 49 | int x = 0; |
| 50 | int y = 0; |
| 51 | if (srcSize.getColumns() > srcSize.getRows()) { |
| 52 | double ratio = (double) srcSize.getRows() |
| 53 | / (double) srcSize.getColumns(); |
| 54 | h = (int) Math.round(ratio * h); |
| 55 | y = (buff.getHeight() - h) / 2; |
| 56 | } else { |
| 57 | double ratio = (double) srcSize.getColumns() |
| 58 | / (double) srcSize.getRows(); |
| 59 | w = (int) Math.round(ratio * w); |
| 60 | x = (buff.getWidth() - w) / 2; |
| 61 | |
| 62 | } |
| 63 | |
| 64 | if (gfx.drawImage(image, x, y, w, h, new ImageObserver() { |
| 65 | @Override |
| 66 | public boolean imageUpdate(Image img, int infoflags, int x, |
| 67 | int y, int width, int height) { |
| 68 | ImageText.this.ready = true; |
| 69 | return true; |
| 70 | } |
| 71 | })) { |
| 72 | ready = true; |
| 73 | } |
| 74 | |
| 75 | while (!ready) { |
| 76 | try { |
| 77 | Thread.sleep(100); |
| 78 | } catch (InterruptedException e) { |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | gfx.dispose(); |
| 83 | |
| 84 | int[][] square = new int[2][2]; |
| 85 | StringBuilder builder = new StringBuilder(); |
| 86 | for (int row = 0; row < buff.getHeight(); row += 2) { |
| 87 | if (row > 0) |
| 88 | builder.append('\n'); |
| 89 | |
| 90 | for (int col = 0; col < buff.getWidth(); col += 2) { |
| 91 | square[0][0] = buff.getRGB(col, row); |
| 92 | square[0][1] = buff.getRGB(col, row + 1); |
| 93 | square[1][0] = buff.getRGB(col + 1, row); |
| 94 | square[1][1] = buff.getRGB(col + 1, row + 1); |
| 95 | builder.append(getChar(square)); |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | text = builder.toString(); |
| 100 | } |
| 101 | |
| 102 | return text; |
| 103 | } |
| 104 | |
| 105 | @Override |
| 106 | public String toString() { |
| 107 | return getText(); |
| 108 | } |
| 109 | |
| 110 | static private TerminalSize getSize(Image img) { |
| 111 | TerminalSize size = null; |
| 112 | while (size == null) { |
| 113 | int w = img.getWidth(null); |
| 114 | int h = img.getHeight(null); |
| 115 | if (w > -1 && h > -1) { |
| 116 | size = new TerminalSize(w, h); |
| 117 | } else { |
| 118 | try { |
| 119 | Thread.sleep(100); |
| 120 | } catch (InterruptedException e) { |
| 121 | } |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | return size; |
| 126 | } |
| 127 | |
| 128 | static private char getChar(int[][] square) { |
| 129 | int choice = 0; |
| 130 | if (rgb2hsl(square[0][0])[3] > 50) |
| 131 | choice += 1; |
| 132 | if (rgb2hsl(square[0][1])[3] > 50) |
| 133 | choice += 2; |
| 134 | if (rgb2hsl(square[1][0])[3] > 50) |
| 135 | choice += 4; |
| 136 | if (rgb2hsl(square[1][1])[3] > 50) |
| 137 | choice += 8; |
| 138 | |
| 139 | switch (choice) { |
| 140 | case 0: |
| 141 | return ' '; |
| 142 | case 1: |
| 143 | return '▘'; |
| 144 | case 2: |
| 145 | return '▝'; |
| 146 | case 3: |
| 147 | return '▀'; |
| 148 | case 4: |
| 149 | return '▖'; |
| 150 | case 5: |
| 151 | return '▌'; |
| 152 | case 6: |
| 153 | return '▞'; |
| 154 | case 7: |
| 155 | return '▛'; |
| 156 | case 8: |
| 157 | return '▗'; |
| 158 | case 9: |
| 159 | return '▚'; |
| 160 | case 10: |
| 161 | return '▐'; |
| 162 | case 11: |
| 163 | return '▜'; |
| 164 | case 12: |
| 165 | return '▄'; |
| 166 | case 13: |
| 167 | return '▙'; |
| 168 | case 14: |
| 169 | return '▟'; |
| 170 | case 15: |
| 171 | return '█'; |
| 172 | } |
| 173 | |
| 174 | return ' '; |
| 175 | } |
| 176 | |
| 177 | // return [a, h, s, l]; a/s/l: 0 to 100%, h = 0 to 359° |
| 178 | static int[] rgb2hsl(int argb) { |
| 179 | double a, r, g, b; |
| 180 | a = ((argb & 0xff000000) >> 24) / 255.0; |
| 181 | r = ((argb & 0x00ff0000) >> 16) / 255.0; |
| 182 | g = ((argb & 0x0000ff00) >> 8) / 255.0; |
| 183 | b = ((argb & 0x000000ff)) / 255.0; |
| 184 | |
| 185 | double rgbMin, rgbMax; |
| 186 | rgbMin = Math.min(r, Math.min(g, b)); |
| 187 | rgbMax = Math.max(r, Math.max(g, b)); |
| 188 | |
| 189 | double l; |
| 190 | l = (rgbMin + rgbMax) / 2; |
| 191 | |
| 192 | double s; |
| 193 | if (rgbMin == rgbMax) { |
| 194 | s = 0; |
| 195 | } else { |
| 196 | if (l <= 0.5) { |
| 197 | s = (rgbMax - rgbMin) / (rgbMax + rgbMin); |
| 198 | } else { |
| 199 | s = (rgbMax - rgbMin) / (2.0 - rgbMax - rgbMin); |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | double h; |
| 204 | if (r > g && r > b) { |
| 205 | h = (g - b) / (rgbMax - rgbMin); |
| 206 | } else if (g > b) { |
| 207 | h = 2.0 + (b - r) / (rgbMax - rgbMin); |
| 208 | } else { |
| 209 | h = 4.0 + (r - g) / (rgbMax - rgbMin); |
| 210 | } |
| 211 | |
| 212 | int aa = (int) Math.round(100 * a); |
| 213 | int hh = (int) (60 * h); |
| 214 | if (hh < 0) |
| 215 | hh += 360; |
| 216 | int ss = (int) Math.round(100 * s); |
| 217 | int ll = (int) Math.round(100 * l); |
| 218 | |
| 219 | return new int[] { aa, hh, ss, ll }; |
| 220 | } |
| 221 | } |