Hi Ken, the problem was solved by checking bitsPerPixel and changed the pixel format to GL_RGB, GL_UNSIGNED_BYTE
but, if the best combination of format / type is GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV so does it means we need to convert RGB / RGBA to BGRA? sorry for posting in cocoa list 2010/3/13 Ken Ferry <kenfe...@gmail.com> > Hi, > > Please go down to the phrase "apps are rather fond of hardcoding bitmap > formats" in the AppKit release notes. > http://developer.apple.com/mac/library/releasenotes/cocoa/appkit.html > > >> If the latter I suspect that your file is not in the needed format. > > Does your image have alpha? > > format is bmp > > > The file format is bmp, but there's also a pixel format, which is the > layout of the uncompressed bytes in memory. It is necessary to convert the > data to the pixel format that you're telling GL the data is in. You > said GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV. > > The version you have involving NSImage is not safe either, it just happens > to work today. > > -ken > > On Fri, Mar 12, 2010 at 10:03 AM, Ariel Feinerman > <arielfap...@gmail.com>wrote: > >> 2010/3/12 Alexander Spohr <a...@freeport.de> >> >> Exactly what does not work? >> > The loading? Or the opengl command? >> > >> > >> texture is corrupted with artifact on the screen and sometimes >> >> >> gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGBA, [image pixelsWide], [image >> pixelsHigh], GL_RGBA, GL_UNSIGNED_INT_8_8_8_8_REV, [image bitmapData]); >> >> take an exception >> >> If the latter I suspect that your file is not in the needed format. >> > Does your image have alpha? >> > >> > format is bmp >> >> there is of the matter is that messages -initWithCIImage and >> -initWithFocusedViewRect >> read bitmap date from offscreen window so image is rendered twice, isn`t >> it? >> >> reference >> >> The image in the *ciImage* parameter must be fully rendered before the >> receiver can be initialized. If you specify an object whose rendering was >> deferred (and thus does not have any pixels available now), this method >> forces the image to be rendered immediately. Rendering the image could >> result in a performance penalty if the image has a complex rendering chain >> or accelerated rendering hardware is not available. >> >> Is the way to get NSBitmapImageRep for OpenGL without offscreen rendering >> image? >> >> atze >> > >> > >> > >> > Am 12.03.2010 um 13:09 schrieb Ariel Feinerman: >> > >> > > // not work >> > > >> > > NSData *data = [NSData dataWithContentsOfFile: filename]; >> > > >> > > NSBitmapImageRep *image = [[NSBitmapImageRep alloc] initWithData: >> data]; >> > > >> > > >> > > as opposed to: >> > > >> > > // works fine >> > > >> > > NSImage *source = [[NSImage alloc] initWithContentsOfFile: filename]; >> > > >> > > NSSize size = [source size]; >> > > >> > > [source lockFocus]; >> > > >> > > NSBitmapImageRep *image = [[NSBitmapImageRep alloc] >> > initWithFocusedViewRect: >> > > NSMakeRect(0.0, 0.0, size.width, size.height)]; >> > > >> > > [source unlockFocus]; >> > > >> > > >> > > // OpenGL commands >> > > >> > > >> > > gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGBA, [image pixelsWide], [image >> > > pixelsHigh], GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, [image >> bitmapData]); >> > > >> > > why? >> > > >> > > >> > > as opposed to >> > > _______________________________________________ >> > > >> > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) >> > > >> > > Please do not post admin requests or moderator comments to the list. >> > > Contact the moderators at cocoa-dev-admins(at)lists.apple.com >> > > >> > > Help/Unsubscribe/Update your Subscription: >> > > http://lists.apple.com/mailman/options/cocoa-dev/atze%40freeport.de >> > > >> > > This email sent to a...@freeport.de >> > >> > >> -- >> best regards >> Ariel >> _______________________________________________ >> >> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) >> >> Please do not post admin requests or moderator comments to the list. >> Contact the moderators at cocoa-dev-admins(at)lists.apple.com >> >> Help/Unsubscribe/Update your Subscription: >> http://lists.apple.com/mailman/options/cocoa-dev/kenferry%40gmail.com >> >> This email sent to kenfe...@gmail.com >> > > _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
