I think you just need to delete your texture after unbindTexture… Not sure, but sounds logical.
On Nov 23, 2012, at 11:47 AM, Christophe Leske <[email protected]> wrote: > Sorry, > > but this is still not working, although I added the new state saving and > restoring code vaude posted. > > > I got this (see below), and am still getting the same error for the > textureUnbinding call: > > *** OpenGL error 0x0502 (invalid operation) in function "-[QCPlugInInputImage > unbindTextureRepresentationFromCGLContext:textureUnit:]" > > > for the line > > [imageToUse unbindTextureRepresentationFromCGLContext:cgl_ctx > textureUnit:GL_TEXTURE0]; > > > > Did I add everything right? Are there other things being affected by the code > that might need to be saved and restored? > > > Would it help to post the whole project somwhere? I got no problem with this. > > > > > ----> my code from hereon: > > > // open gl > CGLContextObj cgl_ctx = [context CGLContextObj]; > GLenum error; > > > glPushAttrib(GL_ALL_ATTRIB_BITS); > > GLint previousFBO, previousReadFBO,previousDrawFBO; > > glGetIntegerv(GL_FRAMEBUFFER_BINDING_EXT, &previousFBO); > glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING_EXT, &previousReadFBO); > glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING_EXT, &previousDrawFBO); > > > if (![imageToUse lockTextureRepresentationWithColorSpace:colorSpace > forBounds:[imageToUse imageBounds]]) > { > NSLog(@"Locking of texture failed."); > return NO; > } > > [imageToUse bindTextureRepresentationToCGLContext:cgl_ctx > textureUnit:GL_TEXTURE0 normalizeCoordinates:YES]; > > > // scaling in opengl comes here... > const GLuint scaledTexture; > const GLuint myFBO; > > int width = self.inputWidthLEDWall; > int height = self.inputHeightLEDWall; > > > glGenTextures(1, &scaledTexture); // make the destination scaled > texture > // TODO: set up texture dimensions via glTexImage2D > > glGenFramebuffers(1, &myFBO); // make the drawing FBO to perform the > scaling > glBindFramebuffer(GL_FRAMEBUFFER_EXT, myFBO); > glFramebufferTexture2D(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, > GL_TEXTURE_2D, scaledTexture, 0); > glDrawBuffer(GL_COLOR_ATTACHMENT0); > > // bind source texture -- you might just use the bindTextureRep call here? > //glBindTexture(GL_TEXTURE_2D (or rect?), GL_TEXTURE0); > glBindTexture(GL_TEXTURE_2D, GL_TEXTURE0); > > // set up projection -- pixel-for-pixel orthographic > glMatrixMode(GL_MODELVIEW); > glLoadIdentity(); > glMatrixMode(GL_PROJECTION); > glLoadIdentity(); > glOrtho(0,width,height,0,0,1); > > // draw the source to the destination > // TODO: if better-than-bilinear-scaling is desired, add a shader here to > do bicubic or something > glBegin(GL_QUADS); > glTexCoord2f(0,0); > glVertex2f(0,0); > glTexCoord2f(1,0); > glVertex2f(width,0); > glTexCoord2f(1,1); > glVertex2f(width,height); > glTexCoord2f(0,1); > glVertex2f(0, height); > glEnd(); > > // done! scaledTexture now has the scaled contents using bilinear > scaling in hardware > // make sure to delete fbos and texture when done. > GLvoid* pixelData = malloc(width * height *3); > > glReadPixels(0,0,width, height, GL_RGB, GL_UNSIGNED_INT_8_8_8_8, > &pixelData); > > free(pixelData); > > glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, previousFBO); > glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, previousReadFBO); > glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, previousDrawFBO); > > glPopAttrib(); > > > glDeleteTextures(1, &scaledTexture); > glDeleteBuffers(1, &myFBO); > > [imageToUse unbindTextureRepresentationFromCGLContext:cgl_ctx > textureUnit:GL_TEXTURE0]; > > [imageToUse unlockTextureRepresentation]; > > > -- > Christophe Leske > multimedial.de > > ---------------------------------------- > www.multimedial.de - [email protected] > Hohler Strasse 17 - 51645 Gummersbach > +49(0)2261-99824540 // +49(0)177-2497031 > ---------------------------------------- > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Quartzcomposer-dev mailing list ([email protected]) > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/quartzcomposer-dev/info%40cogevj.hu > > This email sent to [email protected] _______________________________________________ Do not post admin requests to the list. They will be ignored. Quartzcomposer-dev mailing list ([email protected]) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/quartzcomposer-dev/archive%40mail-archive.com This email sent to [email protected]
