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-rw-r--r--src/jogl/classes/com/jogamp/opengl/util/GLPixelBuffer.java24
1 files changed, 17 insertions, 7 deletions
diff --git a/src/jogl/classes/com/jogamp/opengl/util/GLPixelBuffer.java b/src/jogl/classes/com/jogamp/opengl/util/GLPixelBuffer.java
index 0e3497bd4..845c23080 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/GLPixelBuffer.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/GLPixelBuffer.java
@@ -321,14 +321,24 @@ public class GLPixelBuffer {
} else if( 4 == componentCount || glesReadMode ) {
final GLContext ctx = gl.getContext();
final int _dFormat = ctx.getDefaultPixelDataFormat();
- final int dComps = GLBuffers.componentCount(_dFormat);
- if( dComps == componentCount || 4 == dComps ) { // accept if desired component count or 4 components
- dFormat = _dFormat;
- dType = ctx.getDefaultPixelDataType();
- } else {
- dFormat = GL.GL_RGBA;
- dType = GL.GL_UNSIGNED_BYTE;
+ final int _dComps = GLBuffers.componentCount(_dFormat);
+ if( _dComps == componentCount || 4 == _dComps ) { // accept if desired component count or 4 components
+ // pre-check whether default is supported by implementation
+ final int _dType = ctx.getDefaultPixelDataType();
+ final PixelFormat _pixFmt = getPixelFormat(_dFormat, _dType);
+ if( null != _pixFmt) {
+ return new GLPixelAttributes(null, _pixFmt, _dFormat, _dType, pack, true);
+ }
+ if( GLContext.DEBUG ) {
+ System.err.println("GLPixelAttributes.convert("+gl.getGLProfile()+", comps "+componentCount+", pack "+pack+
+ "): GL-impl default unsupported: "+
+ "[fmt 0x"+Integer.toHexString(_dFormat)+", type 0x"+Integer.toHexString(_dType)+"]: Using std RGBA+UBYTE");
+ Thread.dumpStack();
+ }
+ // fall-through intended to set dFormat/dType to std values
}
+ dFormat = GL.GL_RGBA;
+ dType = GL.GL_UNSIGNED_BYTE;
} else {
return null;
}