I don't know the format, size, etc. of the images that you are working with. There are a few things that can affect the time it takes to move image data around. GTK should be able to handle the problem well though.
Try setting up a test environment with a frame counter and a timer on your image transfer function and see how long it takes. Work from there to optimize the situation. You can use a Pixbuf or a cairo image surface if you need to deal with byte copies or pixel by pixel copies. It's worth a try. https://developer.gnome.org/gdk-pixbuf/stable/gdk-pixbuf-The-GdkPixbuf-Structure.html https://cairographics.org/manual/cairo-Image-Surfaces.html Eric /* gcc -Wall cairo_image1.c -o cairo_image1 `pkg-config gtk+-3.0 --cflags --libs` Tested on Ubuntu16.04 32-bit with GTK3.18. */ #include<gtk/gtk.h> #include<stdint.h> cairo_surface_t *surface=NULL; static gboolean animate_drawing(GtkWidget *drawing, GdkFrameClock *frame_clock, gpointer data); static gboolean da_drawing(GtkWidget *da, cairo_t *cr, gpointer data); static void draw_image(cairo_t *cr); int main(int argc, char *argv[]) { gtk_init(&argc, &argv); GtkWidget *window=gtk_window_new(GTK_WINDOW_TOPLEVEL); gtk_window_set_title(GTK_WINDOW(window), "Cairo Image"); gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER); gtk_window_set_default_size(GTK_WINDOW(window), 400, 400); g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL); surface=cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 400, 400); GtkWidget *da=gtk_drawing_area_new(); gtk_widget_set_hexpand(da, TRUE); gtk_widget_set_vexpand(da, TRUE); g_signal_connect(da, "draw", G_CALLBACK(da_drawing), NULL); GtkWidget *grid=gtk_grid_new(); gtk_grid_attach(GTK_GRID(grid), da, 0, 0, 1, 1); gtk_container_add(GTK_CONTAINER(window), grid); gtk_widget_show_all(window); gtk_widget_add_tick_callback(GTK_WIDGET(da), (GtkTickCallback)animate_drawing, NULL, NULL); gtk_main(); cairo_surface_destroy(surface); return 0; } static gboolean animate_drawing(GtkWidget *da, GdkFrameClock *frame_clock, gpointer data) { //Check frame rate. gint64 frame=gdk_frame_clock_get_frame_counter(frame_clock); gint64 current_time=gdk_frame_clock_get_frame_time(frame_clock); gint64 start = gdk_frame_clock_get_history_start(frame_clock); gint64 history_len=frame-start; GdkFrameTimings *previous_timings=gdk_frame_clock_get_timings(frame_clock, frame-history_len); gint64 previous_frame_time=gdk_frame_timings_get_frame_time(previous_timings); g_print("Frame %i, %f fps\n", (gint)frame, (gdouble)(history_len)*G_USEC_PER_SEC/(gdouble)(current_time-previous_frame_time)); gtk_widget_queue_draw(da); return G_SOURCE_CONTINUE; } static gboolean da_drawing(GtkWidget *da, cairo_t *cr, gpointer data) { //Get the draw time. GTimer *timer=g_timer_new(); draw_image(cr); g_print("Time %f\n", g_timer_elapsed(timer, NULL)); g_timer_destroy(timer); return FALSE; } static void draw_image(cairo_t *cr) { static gint counter=0; gint i=0; gint j=0; gint width=cairo_image_surface_get_width(surface); gint height=cairo_image_surface_get_height(surface); uint32_t *p1=(uint32_t*)cairo_image_surface_get_data(surface); for(i=0;i<height;i++) { for(j=0;j<width;j++) { if(counter==i||counter==i+1) *p1=0xffff00ff; else *p1=0xffffffff; p1++; } } cairo_surface_mark_dirty(surface); cairo_set_source_surface(cr, surface, 0.0, 0.0); cairo_paint(cr); if(counter>height) counter=0; else counter++; }
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