simono41/TerminalImageViewer
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256 color mode support

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This commit is contained in:
Stefan Haustein 2016-06-26 13:09:25 +02:00
parent 3f421d467d
commit de5fb08cf0
1 changed files with 39 additions and 16 deletions
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55
src/main/java/TerminalImageViewer.java
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@ -26,27 +26,33 @@ public class TerminalImageViewer {
int start = 0;
int w = 80 * 4;
if (args[0].equals("-w") && args.length > 2) {
w = 4 * Integer.parseInt(args[1]);
start = 2;
int mode = Ansi.MODE_24BIT;
while (start < args.length && args[start].startsWith("-")) {
String option = args[start];
if (option.equals("-w") && args.length > start + 1) {
w = 4 * Integer.parseInt(args[++start]);
} else if (option.equals("-256")) {
mode = Ansi.MODE_256;
}
start++;
}
if (start == args.length - 1) {
String name = args[start];
BufferedImage original = loadImage(args[start]);
BufferedImage original = loadImage(name);
int ow = original.getWidth();
int oh = original.getHeight();
int h = oh * w / ow;
if (w == ow) {
dump(original);
dump(original, mode);
} else {
BufferedImage image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
Graphics2D graphics = image.createGraphics();
graphics.drawImage(original, 0, 0, w, h, null);
dump(image);
dump(image, mode);
}
} else {
// Directory-style rendering.
@ -77,7 +83,7 @@ public class TerminalImageViewer {
// Probably no image; ignore.
}
}
dump(image);
dump(image, mode);
System.out.println(sb.toString());
System.out.println();
}
@ -92,7 +98,7 @@ public class TerminalImageViewer {
return ImageIO.read(new File(name));
}
static void dump(BufferedImage image) {
static void dump(BufferedImage image, int mode) {
int w = image.getWidth();
ImageData imageData = new ImageData(w, image.getHeight());
byte[] data = imageData.data;
@ -108,7 +114,7 @@ public class TerminalImageViewer {
pos++;
}
}
System.out.print(imageData.dump());
System.out.print(imageData.dump(mode));
}
/**
@ -116,13 +122,30 @@ public class TerminalImageViewer {
*/
static class Ansi {
public static final String RESET = "\u001b[0m";
public static int FG = 0;
public static int BG = 1;
public static int MODE_256 = 2;
public static int MODE_24BIT = 0;
public static String fgColor(int r, int g, int b) {
return "\u001b[38;2;" + (r & 255) + ";" + (g & 255) + ";" + (b & 255) + "m";
public static int clamp(int value, int min, int max) {
return Math.min(Math.max(value, min), max);
}
public static String bgColor(int r, int g, int b) {
return "\u001b[48;2;" + (r & 255) + ";" + (g & 255) + ";" + (b & 255) + "m";
public static String color(int flags, int r, int g, int b) {
r = clamp(r, 0, 255);
g = clamp(g, 0, 255);
b = clamp(b, 0, 255);
boolean bg = (flags & BG) != 0;
if ((flags & MODE_256) != 0) {
r = Math.round(r / 51f);
g = Math.round(g / 51f);
b = Math.round(b / 51f);
return (bg ? "\u001B[48;5;" : "\u001B[38;5;") + (16 + 36 * r + 6 * g + b) + "m";
} else {
return (bg ? "\u001b[48;2;" : "\u001b[38;2;") + r + ";" + g + ";" + b + "m";
}
}
}
@ -373,7 +396,7 @@ public class TerminalImageViewer {
/**
* Convert the image to an Ansi control character string setting the colors
*/
public String dump() {
public String dump(int mode) {
StringBuilder sb = new StringBuilder();
BlockChar blockChar = new BlockChar();
@ -383,8 +406,8 @@ public class TerminalImageViewer {
String lastBg = "";
for (int x = 0; x < width - 3; x += 4) {
blockChar.load(data, pos, width * 4);
String fg = Ansi.fgColor(blockChar.fgColor[0], blockChar.fgColor[1], blockChar.fgColor[2]);
String bg = Ansi.bgColor(blockChar.bgColor[0], blockChar.bgColor[1], blockChar.bgColor[2]);
String fg = Ansi.color(Ansi.FG|mode, blockChar.fgColor[0], blockChar.fgColor[1], blockChar.fgColor[2]);
String bg = Ansi.color(Ansi.BG|mode, blockChar.bgColor[0], blockChar.bgColor[1], blockChar.bgColor[2]);
if (!fg.equals(lastFg)) {
sb.append(fg);
lastFg = fg;