202 2006-02-07 12:07:21 +0100 Render to texture no longer working correctly 2010-11-19 12:31:29 +0100 0 0 3 JogAmp Jogl core 1 All windows VERIFIED INVALID http://www.cs.rutgers.edu/~tedmunds/share/jogl/RenderToTextureBasic.java P5 normal --- 1 sgothel sgothel DEFECT --- oldest_to_newest 218 0 sgothel 2010-03-24 07:48:27 +0100 ---- Reported by tedmunds 2006-02-07 12:07:21 ---- The (relatively) recent changes to how Pbuffer contexts are managed has resulted in undesirable behaviour on a simple render-to-texture test case. In the test case, the Pbuffer is bound to a texture, a scene is rendered to the Pbuffer, the Pbuffer is unbound, and then the texture is used in rendering to the main frame buffer. Before the implementation changes for JSR-231, this test application functioned correctly (i.e. when the texture was mapped onto a rectangle, the image was as expected); now, the rendering to texture does not seem to have been completed before the texture is accessed for rendering in the frame buffer. By alternating the colour of the scene each time when rendering to the Pbuffer, it becomes clear that the texture access is getting a mix of the old contents and the new contents of the Pbuffer. This behaviour is present in both the latest release and the latest nightly build. The associated URL points to the code for the example application. ---- Additional Comments From tedmunds 2006-02-07 12:08:27 ---- Created an attachment Example application (in demos.renderToTexture package). ---- Additional Comments From tedmunds 2006-02-07 14:25:34 ---- I have downgraded the priority of this defect after discovering that the framebuffer object extension is now sufficiently accessible to provide the desired functionality. An example implementation using framebuffer objects that corresponds to the submitted defect example is available at http://www.cs.rutgers.edu/~tedmunds/share/jogl/RenderToTextureFBO.java (and will be attached to this issue). ---- Additional Comments From tedmunds 2006-02-07 14:28:43 ---- Created an attachment Framebuffer object implementation of the desired functionality ---- Additional Comments From kbr 2006-02-15 19:44:09 ---- The basic problem doesn't seem to be reproducible, at least not on all hardware. The RenderToTextureBasic test case seems to render properly, with four orange teapots showing up on the square background behind the gray teapot. It's possible that an appropriately-placed glFinish() call in the application will cause it to behave better. In general the render-to-texture support in the GLCapabilities is non-portable and not to be relied on. The submitter is correct that FBOs are the best way to do render-to-texture portably. This bug will probably be closed as "works for me", but would like to incorporate these test cases, slightly modified, into the jogl-demos package. Will contact the submitter for permission. --- Bug imported by sgothel@jausoft.com 2010-03-24 07:48 EDT --- This bug was previously known as _bug_ 202 at https://jogl.dev.java.net/bugs/show_bug.cgi?id=202 Imported an attachment (id=72) Imported an attachment (id=73) The original submitter of attachment 72 is unknown. Reassigning to the person who moved it here: sgothel@jausoft.com. The original submitter of attachment 73 is unknown. Reassigning to the person who moved it here: sgothel@jausoft.com. 601 1 sgothel 2010-11-19 12:31:29 +0100 not reproducable 72 2006-02-07 12:08:00 +0100 2006-02-07 12:08:00 +0100 Example application (in demos.renderToTexture package). 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