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add more plumbing to set the compression level on JPEG and the DPI for PNG

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This commit is contained in:
Ben Fry
2022-01-30 19:23:12 -05:00
parent 586b572cd3
commit 72a8eb9adf
1 changed files with 21 additions and 7 deletions
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28
core/src/processing/awt/ShimAWT.java
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@@ -6,8 +6,10 @@ import java.awt.image.*;
import java.io.*;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.HashMap;
import java.util.Iterator;
import java.awt.geom.AffineTransform;
import java.util.Map;
import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
@@ -495,7 +497,7 @@ public class ShimAWT implements PConstants {
// . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
static public boolean saveImage(PImage image, String path) {
static public boolean saveImage(PImage image, String path, String... args) {
if (saveImageExtensions == null) {
saveImageExtensions = javax.imageio.ImageIO.getWriterFormatNames();
}
@@ -503,7 +505,7 @@ public class ShimAWT implements PConstants {
if (saveImageExtensions != null) {
for (String saveImageFormat : saveImageExtensions) {
if (path.endsWith("." + saveImageFormat)) {
if (!saveImageIO(image, path)) {
if (!saveImageIO(image, path, args)) {
System.err.println("Error while saving image.");
return false;
}
@@ -530,11 +532,24 @@ public class ShimAWT implements PConstants {
* To get a list of the supported formats for writing, use: <BR>
* <TT>println(javax.imageio.ImageIO.getReaderFormatNames())</TT>
*/
static protected boolean saveImageIO(PImage image, String path) throws IOException {
static protected boolean saveImageIO(PImage image, String path, String... args) throws IOException {
try {
int outputFormat = (image.format == ARGB) ?
BufferedImage.TYPE_INT_ARGB : BufferedImage.TYPE_INT_RGB;
Map<String, Number> params = new HashMap<>();
params.put("quality", 0.9f); // default JPEG quality
params.put("dpi", 100.0); // default DPI for PNG
if (args != null) {
for (String arg : args) {
if (arg.startsWith("quality=")) {
params.put("quality", Float.parseFloat(arg.substring(8)));
} else if (arg.startsWith("dpi=")) {
params.put("dpi", Double.parseDouble(arg.substring(4)));
}
}
}
String extension =
path.substring(path.lastIndexOf('.') + 1).toLowerCase();
@@ -563,16 +578,15 @@ public class ShimAWT implements PConstants {
// it's a completely different algorithm.
param = writer.getDefaultWriteParam();
param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
param.setCompressionQuality(0.9f);
//param.setCompressionQuality(0.9f);
param.setCompressionQuality((Float) params.get("quality"));
}
}
if (extension.equals("png")) {
if ((writer = imageioWriter("png")) != null) {
param = writer.getDefaultWriteParam();
if (false) {
metadata = imageioDPI(writer, param, 100);
}
metadata = imageioDPI(writer, param, (Double) params.get("dpi"));
}
}