diff options
Diffstat (limited to 'gl4java/utils/textures/AWTTextureLoader.java')
| -rw-r--r-- | gl4java/utils/textures/AWTTextureLoader.java | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/gl4java/utils/textures/AWTTextureLoader.java b/gl4java/utils/textures/AWTTextureLoader.java new file mode 100644 index 0000000..2df3145 --- /dev/null +++ b/gl4java/utils/textures/AWTTextureLoader.java @@ -0,0 +1,169 @@ +package gl4java.utils.textures;
+
+import gl4java.*;
+
+import java.awt.*;
+import java.awt.image.*;
+// import java.awt.Color.*;
+// import java.awt.color.*;
+import java.awt.event.*;
+import java.applet.*;
+import java.io.*;
+import java.net.*;
+
+/**
+ * This Class implements the universal
+ * texture-loader using the AWT's standard interface !
+ *
+ * The number of image-types depends
+ * on the JDK version you use !
+ *
+ * @see TextureLoader
+ */
+public class AWTTextureLoader
+extends TextureLoader
+{
+ Component comp;
+
+ public AWTTextureLoader(Component comp, GLFunc gl, GLUFunc glu)
+ {
+ super(gl, glu);
+ this.comp=comp;
+ }
+
+ public boolean readTexture(String fname)
+ {
+ Image img = comp.getToolkit().getImage(fname);
+ return readTexture(comp, img);
+ }
+
+ public boolean readTexture(URL base, String uri)
+ {
+ try {
+ URL url = new URL (base, uri);
+ Image img = comp.getToolkit().getImage(url);
+ return readTexture(comp, img);
+ } catch (Exception ex) {
+ System.out.println("AWTTextureLoader.readTexture <"+
+ base+" / "+uri+"> failed !\n"+ex);
+ }
+ return false;
+ }
+
+ private boolean readTexture(Component comp, Image img)
+ {
+ try {
+ try {
+ MediaTracker tracker = new MediaTracker(comp);
+ tracker.addImage(img, 0);
+ tracker.waitForID(0);
+ }
+ catch ( Exception e ) {}
+
+ imageWidth = img.getWidth(comp);
+ imageHeight = img.getHeight(comp);
+ /* This is Java2 only code :-(
+ BufferedImage image =
+ new BufferedImage(imageWidth, imageHeight,
+ BufferedImage.TYPE_INT_RGB);
+
+ Graphics g = image.createGraphics();
+ g.drawImage(img,0,0,comp);
+
+ imageWidth = image.getWidth();
+ imageHeight = image.getHeight();
+ */
+
+ // Read entire PNG image (doesn't throw exceptions)
+ int[] iPixels = new int[imageWidth * imageHeight];
+
+ PixelGrabber pp=new PixelGrabber(img,
+ 0,0,
+ imageWidth, imageHeight,
+ iPixels,
+ 0,
+ imageWidth);
+ try
+ {
+ pp.grabPixels();
+ }
+ catch (InterruptedException e)
+ {
+ System.err.println("interrupted waiting for pixel!");
+ error=true;
+ return false;
+ }
+ if ((pp.getStatus() & ImageObserver.ABORT) != 0)
+ {
+ System.err.println("image fetch aborted or errored");
+ error=true;
+ return false;
+ }
+
+ /* This is Java2 only code :-(
+ int imagetype = image.getType();
+ switch(imagetype)
+ {
+ case BufferedImage.TYPE_INT_RGB:
+ glFormat=GL_RGB;
+ break;
+ case BufferedImage.TYPE_INT_ARGB:
+ case BufferedImage.TYPE_INT_ARGB_PRE:
+ glFormat=GL_RGBA;
+ break;
+ default:
+ error=true;
+ System.err.println("unsupported format: "+imagetype);
+ return false;
+ };
+ */
+ //
+ // we are guessing the RGB type,
+ // because fetching the true type
+ // is Java2 only code :-(
+ //
+ glFormat=GL_RGB;
+
+ setTextureSize();
+ pixel=new byte[imageWidth * imageHeight * getComponents()];
+
+ int offset=0;
+ int aPixel;
+ int y_desc;
+ for(y_desc=imageHeight-1; y_desc>=0; y_desc--)
+ {
+ for(int x=0;x<imageWidth;x++)
+ {
+ aPixel = iPixels[y_desc*imageWidth + x];
+
+ // red
+ pixel[offset++]=
+ new Integer( (aPixel >> 16) & 0xff ).byteValue();
+
+ // green
+ pixel[offset++]=
+ new Integer( (aPixel >> 8) & 0xff ).byteValue();
+
+ // blue
+ pixel[offset++]=
+ new Integer( (aPixel ) & 0xff ).byteValue();
+
+ // alpha
+ if(glFormat==GL_RGBA)
+ pixel[offset++]=
+ new Integer( (aPixel >> 24) & 0xff ).byteValue();
+ }
+ }
+
+ return true;
+
+ } catch (Exception e) {
+ System.out.println("An exception occured, while loading a AWTTexture");
+ System.out.println(e);
+ error=true;
+ }
+ return false;
+ }
+
+}
+
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