Re: cairo: multiple sprites images in one PNG
Le 15 mars 2012, Christopher Howard a écrit : Question for the veterans: -- ship_surf = cairo_image_surface_create_from_png(ship.png); // ... cairo_set_source_surface (cr, ship_surf, x, y); cairo_paint (cr); -- But what if I want, for ease of maintainability (and less system I/O calls) to put a whole bunch of sprites in one PNG? Is it possible for me to either... * load one PNG image into a surface, and then draw to a CR using only a small part of that surface? or * load one PNG into a surface, and then split that surface into multiple smaller surfaces? I'm no veteran, but I'd create one small cairo_t per sprite, then repeat your last two lines above (where cr would be the sprite), once for each sprite, with appropriate x and y : Cairo will automatically clip what falls outside the sprite's cairo_t. (Your first option seems feasible with clipping, but might be more complicated: you'd need to clip each time you draw the sprite.) -- Lucas Levrel ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
how to i set hscale wigdet to -- say -- 17?
thanks to a great amount of help from this list , my let the computer speak for the speech-impaired [AKA VBC] is making good progress. in fact, my Options pop-up from the menubar is almost ready for integration. but i still want it to look like the program 'gespeaker'---meaning that i want to set, say, Pitch to 17, Speed to 100, Speed in words/minute to a nice, slow 190. and the Delay in 10ths of a second between words to 2 or 3. i have experimented with people who suffer from a hearing loss and some whose native language is not English, c. so: better to default to a slower rate. i want to know how to have gtk draw that orange line from 0 to my default starting point. gespeaker presents a good example. i haven't found the magic google term[s] to find what gtk command i need. can any of you help? thanks in advance, gary -- Gary Kline kl...@thought.org http://www.thought.org Public Service Unix Voice By Computer (for Universal Access): http:/www.thought.org/vbc The 8.57a release of Jottings: http://jottings.thought.org Twenty-five years of service to the Unix community. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
key press events holding keys down
Hey guys -- thanks again for the help I received recently regarding several noobie issues. I'm still working on my space combat game, and came across this little problem: I control the spacecraft with the arrow keys, which I do by grabbing the GdkEventKey and then checking it against GDK_KEY_Left, GDK_KEY_Right, and so forth. Strictly speaking what I am concerned with is whether or not the key is held down, but this seems to work because the key event gets repeated. However, if one of the arrows is held down, and another arrow is pressed, then it shuts off events for the first arrow. That's bad, of course, because in my game the player may want to hold down two arrows keys at once (e.g., UP for acceleration and LEFT to turn the spacecraft). So... * are there configuration settings I need to adjust to change how these GdKEventKeys are generated? or * is there some totally different method of checking and handling key depression state that I should be using? -- frigidcode.com indicium.us ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
