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-rw-r--r--src/jogl/classes/com/jogamp/opengl/FBObject.java130
1 files changed, 92 insertions, 38 deletions
diff --git a/src/jogl/classes/com/jogamp/opengl/FBObject.java b/src/jogl/classes/com/jogamp/opengl/FBObject.java
index c845b46ad..1e2d296f4 100644
--- a/src/jogl/classes/com/jogamp/opengl/FBObject.java
+++ b/src/jogl/classes/com/jogamp/opengl/FBObject.java
@@ -37,6 +37,7 @@ import javax.media.opengl.GL2GL3;
import javax.media.opengl.GL3;
import javax.media.opengl.GLBase;
import javax.media.opengl.GLCapabilities;
+import javax.media.opengl.GLCapabilitiesImmutable;
import javax.media.opengl.GLContext;
import javax.media.opengl.GLException;
import javax.media.opengl.GLProfile;
@@ -1604,6 +1605,68 @@ public class FBObject {
return colbuf;
}
+ private final int getDepthIFormat(final int reqBits) {
+ if( 32 <= reqBits && depth32Avail ) {
+ return GL.GL_DEPTH_COMPONENT32;
+ } else if( 24 <= reqBits && ( depth24Avail || depth32Avail ) ) {
+ if( depth24Avail ) {
+ return GL.GL_DEPTH_COMPONENT24;
+ } else {
+ return GL.GL_DEPTH_COMPONENT32;
+ }
+ } else {
+ return GL.GL_DEPTH_COMPONENT16;
+ }
+ }
+ private final int getStencilIFormat(final int reqBits) {
+ if( 16 <= reqBits && stencil16Avail ) {
+ return GL2GL3.GL_STENCIL_INDEX16;
+ } else if( 8 <= reqBits && ( stencil08Avail || stencil16Avail ) ) {
+ if( stencil08Avail ) {
+ return GL.GL_STENCIL_INDEX8;
+ } else {
+ return GL2GL3.GL_STENCIL_INDEX16;
+ }
+ } else if( 4 <= reqBits && ( stencil04Avail || stencil08Avail || stencil16Avail ) ) {
+ if( stencil04Avail ) {
+ return GL.GL_STENCIL_INDEX4;
+ } else if( stencil08Avail ) {
+ return GL.GL_STENCIL_INDEX8;
+ } else {
+ return GL2GL3.GL_STENCIL_INDEX16;
+ }
+ } else if( 1 <= reqBits && ( stencil01Avail || stencil04Avail || stencil08Avail || stencil16Avail ) ) {
+ if( stencil01Avail ) {
+ return GL.GL_STENCIL_INDEX1;
+ } else if( stencil04Avail ) {
+ return GL.GL_STENCIL_INDEX4;
+ } else if( stencil08Avail ) {
+ return GL.GL_STENCIL_INDEX8;
+ } else {
+ return GL2GL3.GL_STENCIL_INDEX16;
+ }
+ } else {
+ throw new GLException("stencil buffer n/a");
+ }
+ }
+
+ /** Request default bit count for depth- or stencil buffer (depth 24 bits, stencil 8 bits), value {@value} */
+ public static final int DEFAULT_BITS = 0;
+
+ /**
+ * Request current context drawable's <i>requested</i>
+ * {@link GLCapabilitiesImmutable#getDepthBits() depth-} or {@link GLCapabilitiesImmutable#getStencilBits() stencil-}bits; value {@value} */
+ public static final int REQUESTED_BITS = -1;
+
+ /**
+ * Request current context drawable's <i>chosen</i>
+ * {@link GLCapabilitiesImmutable#getDepthBits() depth-} or {@link GLCapabilitiesImmutable#getStencilBits() stencil-}bits; value {@value} */
+ public static final int CHOSEN_BITS = -2;
+
+ /** Request maximum bit count for depth- or stencil buffer (depth 32 bits, stencil 16 bits), value {@value} */
+ public static final int MAXIMUM_BITS = -3;
+
+
/**
* Attaches one depth, stencil or packed-depth-stencil buffer to this FBO's instance,
* selecting the internalFormat automatically.
@@ -1611,7 +1674,8 @@ public class FBObject {
* Stencil and depth buffer can be attached only once.
* </p>
* <p>
- * In case the desired type or bit-number is not supported, the next available one is chosen.
+ * In case the bit-count is not supported,
+ * the next available one is chosen, i.e. next higher (preferred) or lower bit-count.
* </p>
* <p>
* Use {@link #getDepthAttachment()} and/or {@link #getStencilAttachment()} to retrieve details
@@ -1623,68 +1687,58 @@ public class FBObject {
*
* @param gl
* @param atype either {@link Type#DEPTH}, {@link Type#STENCIL} or {@link Type#DEPTH_STENCIL}
- * @param reqBits desired bits for depth or -1 for default (24 bits)
+ * @param reqBits desired bits for depth or stencil,
+ * may use generic values {@link #DEFAULT_BITS}, {@link #REQUESTED_BITS}, {@link #CHOSEN_BITS} or {@link #MAXIMUM_BITS}.
* @throws GLException in case the renderbuffer couldn't be allocated or one is already attached.
* @throws IllegalArgumentException
* @see #getDepthAttachment()
* @see #getStencilAttachment()
*/
- public final void attachRenderbuffer(final GL gl, final Attachment.Type atype, int reqBits) throws GLException, IllegalArgumentException {
- if( 0 > reqBits ) {
- reqBits = 24;
+ public final void attachRenderbuffer(final GL gl, final Attachment.Type atype, final int reqBits) throws GLException, IllegalArgumentException {
+ final int reqDepth, reqStencil;
+ if( MAXIMUM_BITS > reqBits ) {
+ throw new IllegalArgumentException("reqBits out of range, shall be >= "+MAXIMUM_BITS);
+ } else if( MAXIMUM_BITS == reqBits ) {
+ reqDepth = 32;
+ reqStencil = 16;
+ } else if( CHOSEN_BITS == reqBits ) {
+ final GLCapabilitiesImmutable caps = gl.getContext().getGLDrawable().getChosenGLCapabilities();
+ reqDepth = caps.getDepthBits();
+ reqStencil = caps.getStencilBits();
+ } else if( REQUESTED_BITS == reqBits ) {
+ final GLCapabilitiesImmutable caps = gl.getContext().getGLDrawable().getRequestedGLCapabilities();
+ reqDepth = caps.getDepthBits();
+ reqStencil = caps.getStencilBits();
+ } else if( DEFAULT_BITS == reqBits ) {
+ reqDepth = 24;
+ reqStencil = 8;
+ } else {
+ reqDepth = reqBits;
+ reqStencil = reqBits;
}
final int internalFormat;
int internalStencilFormat = -1;
switch ( atype ) {
case DEPTH:
- if( 32 <= reqBits && depth32Avail ) {
- internalFormat = GL.GL_DEPTH_COMPONENT32;
- } else if( 24 <= reqBits && depth24Avail ) {
- internalFormat = GL.GL_DEPTH_COMPONENT24;
- } else {
- internalFormat = GL.GL_DEPTH_COMPONENT16;
- }
+ internalFormat = getDepthIFormat(reqDepth);
break;
case STENCIL:
- if( 16 <= reqBits && stencil16Avail ) {
- internalFormat = GL2GL3.GL_STENCIL_INDEX16;
- } else if( 8 <= reqBits && stencil08Avail ) {
- internalFormat = GL.GL_STENCIL_INDEX8;
- } else if( 4 <= reqBits && stencil04Avail ) {
- internalFormat = GL.GL_STENCIL_INDEX4;
- } else if( 1 <= reqBits && stencil01Avail ) {
- internalFormat = GL.GL_STENCIL_INDEX1;
- } else {
- throw new GLException("stencil buffer n/a");
- }
+ internalFormat = getStencilIFormat(reqStencil);
break;
case DEPTH_STENCIL:
if( packedDepthStencilAvail ) {
internalFormat = GL.GL_DEPTH24_STENCIL8;
} else {
- if( 24 <= reqBits && depth24Avail ) {
- internalFormat = GL.GL_DEPTH_COMPONENT24;
- } else {
- internalFormat = GL.GL_DEPTH_COMPONENT16;
- }
- if( stencil08Avail ) {
- internalStencilFormat = GL.GL_STENCIL_INDEX8;
- } else if( stencil04Avail ) {
- internalStencilFormat = GL.GL_STENCIL_INDEX4;
- } else if( stencil01Avail ) {
- internalStencilFormat = GL.GL_STENCIL_INDEX1;
- } else {
- throw new GLException("stencil buffer n/a");
- }
+ internalFormat = getDepthIFormat(reqDepth);
+ internalStencilFormat = getStencilIFormat(reqStencil);
}
break;
default:
throw new IllegalArgumentException("only depth/stencil types allowed, was "+atype+", "+this);
}
-
attachRenderbufferImpl(gl, atype, internalFormat);
if(0<=internalStencilFormat) {
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-30 12:40:59 +0000