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-rw-r--r--src/net/java/games/jogl/GLJPanel.java98
1 files changed, 63 insertions, 35 deletions
diff --git a/src/net/java/games/jogl/GLJPanel.java b/src/net/java/games/jogl/GLJPanel.java
index 61b1016af..819d85b54 100644
--- a/src/net/java/games/jogl/GLJPanel.java
+++ b/src/net/java/games/jogl/GLJPanel.java
@@ -87,11 +87,15 @@ public final class GLJPanel extends JPanel implements GLDrawable {
private GLCapabilities offscreenCaps;
private GLCapabilitiesChooser chooser;
private GLDrawable shareWith;
+ // This image is exactly the correct size to render into the panel
private BufferedImage offscreenImage;
- private int neededOffscreenImageWidth;
- private int neededOffscreenImageHeight;
- private DataBufferByte dbByte;
- private DataBufferInt dbInt;
+ // One of these is used to store the read back pixels before storing
+ // in the BufferedImage
+ private byte[] readBackBytes;
+ private int[] readBackInts;
+ private int readBackWidthInPixels;
+ private int readBackHeightInPixels;
+ // Width of the actual GLJPanel
private int panelWidth = 0;
private int panelHeight = 0;
private Updater updater;
@@ -235,8 +239,8 @@ public final class GLJPanel extends JPanel implements GLDrawable {
Runnable r = new Runnable() {
public void run() {
GLContext context = null;
- neededOffscreenImageWidth = 0;
- neededOffscreenImageHeight = 0;
+ readBackWidthInPixels = 0;
+ readBackHeightInPixels = 0;
if (!hardwareAccelerationDisabled) {
// Use factor larger than 2 during shrinks for some hysteresis
@@ -271,18 +275,16 @@ public final class GLJPanel extends JPanel implements GLDrawable {
// bottleneck. Should probably make the size of the offscreen
// image be the exact size of the pbuffer to save some work on
// resize operations...
- neededOffscreenImageWidth = pbufferWidth;
- neededOffscreenImageHeight = fheight;
+ readBackWidthInPixels = pbufferWidth;
+ readBackHeightInPixels = fheight;
} else {
offscreenContext.resizeOffscreenContext(fwidth, fheight);
context = offscreenContext;
- neededOffscreenImageWidth = fwidth;
- neededOffscreenImageHeight = fheight;
+ readBackWidthInPixels = fwidth;
+ readBackHeightInPixels = fheight;
}
- if (offscreenImage != null &&
- (offscreenImage.getWidth() != neededOffscreenImageWidth ||
- offscreenImage.getHeight() != neededOffscreenImageHeight)) {
+ if (offscreenImage != null) {
offscreenImage.flush();
offscreenImage = null;
}
@@ -554,14 +556,14 @@ public final class GLJPanel extends JPanel implements GLDrawable {
awtFormat = offscreenContext.getOffscreenContextBufferedImageType();
}
- offscreenImage = new BufferedImage(neededOffscreenImageWidth,
- neededOffscreenImageHeight,
+ offscreenImage = new BufferedImage(panelWidth,
+ panelHeight,
awtFormat);
switch (awtFormat) {
case BufferedImage.TYPE_3BYTE_BGR:
glFormat = GL.GL_BGR;
glType = GL.GL_UNSIGNED_BYTE;
- dbByte = (DataBufferByte) offscreenImage.getRaster().getDataBuffer();
+ readBackBytes = new byte[readBackWidthInPixels * readBackHeightInPixels * 3];
break;
case BufferedImage.TYPE_INT_RGB:
@@ -570,7 +572,7 @@ public final class GLJPanel extends JPanel implements GLDrawable {
glType = (hardwareAccelerationDisabled
? offscreenContext.getOffscreenContextPixelDataType()
: hwGLFormat);
- dbInt = (DataBufferInt) offscreenImage.getRaster().getDataBuffer();
+ readBackInts = new int[readBackWidthInPixels * readBackHeightInPixels];
break;
default:
@@ -593,17 +595,17 @@ public final class GLJPanel extends JPanel implements GLDrawable {
gl.glGetIntegerv(GL.GL_PACK_ALIGNMENT, alignment);
gl.glPixelStorei(GL.GL_PACK_SWAP_BYTES, GL.GL_FALSE);
- gl.glPixelStorei(GL.GL_PACK_ROW_LENGTH, offscreenImage.getWidth());
+ gl.glPixelStorei(GL.GL_PACK_ROW_LENGTH, readBackWidthInPixels);
gl.glPixelStorei(GL.GL_PACK_SKIP_ROWS, 0);
gl.glPixelStorei(GL.GL_PACK_SKIP_PIXELS, 0);
gl.glPixelStorei(GL.GL_PACK_ALIGNMENT, 1);
// Actually read the pixels.
gl.glReadBuffer(GL.GL_FRONT);
- if (dbByte != null) {
- gl.glReadPixels(0, 0, offscreenImage.getWidth(), offscreenImage.getHeight(), glFormat, glType, dbByte.getData());
- } else if (dbInt != null) {
- gl.glReadPixels(0, 0, offscreenImage.getWidth(), offscreenImage.getHeight(), glFormat, glType, dbInt.getData());
+ if (readBackBytes != null) {
+ gl.glReadPixels(0, 0, readBackWidthInPixels, readBackHeightInPixels, glFormat, glType, readBackBytes);
+ } else if (readBackInts != null) {
+ gl.glReadPixels(0, 0, readBackWidthInPixels, readBackHeightInPixels, glFormat, glType, readBackInts);
}
// Restore saved modes.
@@ -612,20 +614,46 @@ public final class GLJPanel extends JPanel implements GLDrawable {
gl.glPixelStorei(GL.GL_PACK_SKIP_ROWS, skiprows[0]);
gl.glPixelStorei(GL.GL_PACK_SKIP_PIXELS, skippixels[0]);
gl.glPixelStorei(GL.GL_PACK_ALIGNMENT, alignment[0]);
-
- if (!hardwareAccelerationDisabled ||
- offscreenContext.offscreenImageNeedsVerticalFlip()) {
- // This performs reasonably well; the snippet below does not.
- // Should figure out if we need to set the image scaling
- // preference to FAST since it doesn't require subsampling
- // of pixels -- FIXME
- for (int i = 0; i < panelHeight; i++) {
- g.drawImage(offscreenImage,
- 0, i, panelWidth, i+1,
- 0, panelHeight - i - 1, panelWidth, panelHeight - i,
- GLJPanel.this);
+
+ if (readBackBytes != null || readBackInts != null) {
+ // Copy temporary data into raster of BufferedImage for faster
+ // blitting Note that we could avoid this copy in the cases
+ // where !offscreenContext.offscreenImageNeedsVerticalFlip(),
+ // but that's the software rendering path which is very slow
+ // anyway
+ Object src = null;
+ Object dest = null;
+ int srcIncr = 0;
+ int destIncr = 0;
+
+ if (readBackBytes != null) {
+ src = readBackBytes;
+ dest = ((DataBufferByte) offscreenImage.getRaster().getDataBuffer()).getData();
+ srcIncr = readBackWidthInPixels * 3;
+ destIncr = offscreenImage.getWidth() * 3;
+ } else {
+ src = readBackInts;
+ dest = ((DataBufferInt) offscreenImage.getRaster().getDataBuffer()).getData();
+ srcIncr = readBackWidthInPixels;
+ destIncr = offscreenImage.getWidth();
+ }
+
+ if (!hardwareAccelerationDisabled ||
+ offscreenContext.offscreenImageNeedsVerticalFlip()) {
+ int srcPos = 0;
+ int destPos = (offscreenImage.getHeight() - 1) * destIncr;
+ for (; destPos >= 0; srcPos += srcIncr, destPos -= destIncr) {
+ System.arraycopy(src, srcPos, dest, destPos, destIncr);
+ }
+ } else {
+ int srcPos = 0;
+ int destEnd = destIncr * offscreenImage.getHeight();
+ for (int destPos = 0; destPos < destEnd; srcPos += srcIncr, destPos += destIncr) {
+ System.arraycopy(src, srcPos, dest, destPos, destIncr);
+ }
}
- } else {
+
+ // Draw resulting image in one shot
g.drawImage(offscreenImage, 0, 0, offscreenImage.getWidth(), offscreenImage.getHeight(), GLJPanel.this);
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-16 18:22:14 +0000