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Diffstat (limited to 'examples/animgifimage.cxx')
| -rw-r--r-- | examples/animgifimage.cxx | 303 |
1 files changed, 303 insertions, 0 deletions
diff --git a/examples/animgifimage.cxx b/examples/animgifimage.cxx new file mode 100644 index 000000000..515b76b65 --- /dev/null +++ b/examples/animgifimage.cxx @@ -0,0 +1,303 @@ +// +// Test program for displaying animated GIF files using the +// Fl_Anim_GIF_Image class. +// +#include <FL/Fl_Anim_GIF_Image.H> + +#include <FL/Fl_Double_Window.H> +#include <FL/Fl_File_Chooser.H> +#include <FL/Fl_Shared_Image.H> +#include <FL/Fl_Tiled_Image.H> +#include <stdlib.h> + +static int g_good_count = 0, g_bad_count = 0, g_frame_count = 0; + +static const Fl_Color BackGroundColor = FL_GRAY; // use e.g. FL_RED to see + // transparent parts better +static const double RedrawDelay = 1./20; // interval [sec] for forced redraw + +static void quit_cb(Fl_Widget* w_, void*) { + exit(0); +} + +static void set_title(Fl_Window *win, Fl_Anim_GIF_Image *animgif) { + char buf[200]; + snprintf(buf, sizeof(buf), "%s (%d frames) %2.2fx", fl_filename_name(animgif->name()), + animgif->frames(), animgif->speed()); + if (animgif->frame_uncache()) + strcat(buf, " U"); + win->copy_label(buf); + win->copy_tooltip(buf); +} + +static void cb_forced_redraw(void *d) { + Fl_Window *win = Fl::first_window(); + while (win) { + if (!win->menu_window()) + win->redraw(); + win = Fl::next_window(win); + } + if (Fl::first_window()) + Fl::repeat_timeout(RedrawDelay, cb_forced_redraw); +} + +Fl_Window *openFile(const char *name, char *flags, bool close = false) { + // determine test options from 'flags' + bool uncache = strchr(flags, 'u'); + char *d = flags - 1; + int debug = 0; + while ((d = strchr(++d, 'd'))) debug++; + bool optimize_mem = strchr(flags, 'm'); + bool desaturate = strchr(flags, 'D'); + bool average = strchr(flags, 'A'); + bool test_tiles = strchr(flags, 'T'); + bool test_forced_redraw = strchr(flags, 'f'); + char *r = strchr(flags, 'r'); + bool resizable = r && !test_tiles; + double scale = 1.0; + if (r && resizable) scale = atof(r+1); + if (scale <= 0.1 || scale > 5) + scale = resizable ? 0.7 : 1.0; + + // setup window + Fl::remove_timeout(cb_forced_redraw); + Fl_Double_Window *win = new Fl_Double_Window(300, 300); + win->color(BackGroundColor); + if (close) + win->callback(quit_cb); + printf("Loading '%s'%s%s ... ", name, + uncache ? " (uncached)" : "", + optimize_mem ? " (optimized)" : ""); + + // create a canvas for the animation + Fl_Box *canvas = test_tiles ? 0 : new Fl_Box(0, 0, 0, 0); // canvas will be resized by animation + Fl_Box *canvas2 = 0; + unsigned short gif_flags = debug ? Fl_Anim_GIF_Image::LOG_FLAG : 0; + if (debug > 1) + gif_flags |= Fl_Anim_GIF_Image::DEBUG_FLAG; + if (optimize_mem) + gif_flags |= Fl_Anim_GIF_Image::OPTIMIZE_MEMORY; + + // create animation, specifying this canvas as display widget + Fl_Anim_GIF_Image *animgif = new Fl_Anim_GIF_Image(name, canvas, gif_flags); + bool good( animgif->ld() == 0 && animgif->valid() ); + printf("%s: %d x %d (%d frames) %s\n", + animgif->name(), animgif->w(), animgif->h(), animgif->frames(), good ? "OK" : "ERROR"); + // for the statistics (when run on testsuite): + g_good_count += good; + g_bad_count += !good; + g_frame_count += animgif->frames(); + + win->user_data(animgif); // store address of image (see note in main()) + + // exercise the optional tests on the animation + animgif->frame_uncache(uncache); + if (scale != 1.0) { + animgif->resize(scale); + printf("TEST: resized %s by %.2f to %d x %d\n", animgif->name(), scale, animgif->w(), animgif->h()); + } + if (average) { + printf("TEST: color_average %s\n", animgif->name()); + animgif->color_average(FL_GREEN, 0.5); // currently hardcoded + } + if (desaturate) { + printf("TEST: desaturate %s\n", animgif->name()); + animgif->desaturate(); + } + int W = animgif->w(); + int H = animgif->h(); + if (animgif->frames()) { + if (test_tiles) { + // demonstrate a way how to use the animation with Fl_Tiled_Image + printf("TEST: use %s as tiles\n", animgif->name()); + W *= 2; + H *= 2; + Fl_Tiled_Image *tiled_image = new Fl_Tiled_Image(animgif); + Fl_Group *group = new Fl_Group(0, 0, win->w(), win->h()); + group->image(tiled_image); + group->align(FL_ALIGN_INSIDE); + animgif->canvas(group, Fl_Anim_GIF_Image::DONT_RESIZE_CANVAS | Fl_Anim_GIF_Image::DONT_SET_AS_IMAGE ); + win->resizable(group); + } else { + // demonstrate a way how to use same animation in another canvas simultaneously: + // as the current implementation allows only automatic redraw of one canvas.. + if (test_forced_redraw) { + if (W < 400) { + printf("TEST: open %s in another animation with application redraw\n", animgif->name()); + canvas2 = new Fl_Box(W, 0, animgif->w(), animgif->h()); // another canvas for animation + canvas2->image(animgif); // is set to same animation! + W *= 2; + Fl::add_timeout(RedrawDelay, cb_forced_redraw); // force periodic redraw + } + } + } + // make window resizable (must be done before show()) + if (resizable && canvas && !test_tiles) { + win->resizable(win); + } + win->size(W, H); // change to actual size of canvas + // start the animation + win->end(); + win->show(); + win->wait_for_expose(); + set_title(win, animgif); + if (resizable && !test_tiles) { + // need to reposition the widgets (have been moved by setting resizable()) + if (canvas && canvas2) { + canvas->resize(0, 0, W/2, canvas->h()); + canvas2->resize(W/2, 0, W/2, canvas2->h()); + } + else if (canvas) { + canvas->resize(0, 0, animgif->canvas_w(), animgif->canvas_h()); + } + } + win->init_sizes(); // IMPORTANT: otherwise weird things happen at Ctrl+/- scaling + } else { + delete win; + return 0; + } + if (debug >=3) { + // open each frame in a separate window + for (int i = 0; i < animgif->frames(); i++) { + char buf[200]; + snprintf(buf, sizeof(buf), "Frame #%d", i + 1); + Fl_Double_Window *win = new Fl_Double_Window(animgif->w(), animgif->h()); + win->copy_tooltip(buf); + win->copy_label(buf); + win->color(BackGroundColor); + int w = animgif->image(i)->w(); + int h = animgif->image(i)->h(); + // in 'optimize_mem' mode frames must be offsetted to canvas + int x = (w == animgif->w() && h == animgif->h()) ? 0 : animgif->frame_x(i); + int y = (w == animgif->w() && h == animgif->h()) ? 0 : animgif->frame_y(i); + Fl_Box *b = new Fl_Box(x, y, w, h); + // get the frame image + b->image(animgif->image(i)); + win->end(); + win->show(); + } + } + return win; +} + +#include <FL/filename.H> +bool openDirectory(const char *dir, char *flags) { + dirent **list; + int nbr_of_files = fl_filename_list(dir, &list, fl_alphasort); + if (nbr_of_files <= 0) + return false; + int cnt = 0; + for (int i = 0; i < nbr_of_files; i++) { + char buf[512]; + const char *name = list[i]->d_name; + if (!strcmp(name, ".") || !strcmp(name, "..")) continue; + const char *p = strstr(name, ".gif"); + if (!p) p = strstr(name, ".GIF"); + if (!p) continue; + if (*(p+4)) continue; // is no extension! + snprintf(buf, sizeof(buf), "%s/%s", dir, name); + if (strstr(name, "debug")) // hack: when name contains 'debug' open single frames + strcat(flags, "d"); + if (openFile(buf, flags, cnt == 0)) + cnt++; + } + return cnt != 0; +} + +static void change_speed(double delta) { + Fl_Widget *below = Fl::belowmouse(); + if (below && below->image()) { + Fl_Anim_GIF_Image *animgif = 0; + // Q: is there a way to determine Fl_Tiled_Image without using dynamic cast? + Fl_Tiled_Image *tiled = dynamic_cast<Fl_Tiled_Image *>(below->image()); + animgif = tiled ? + dynamic_cast<Fl_Anim_GIF_Image *>(tiled->image()) : + dynamic_cast<Fl_Anim_GIF_Image *>(below->image()); + if (animgif && animgif->playing()) { + double speed = animgif->speed(); + if (!delta) speed = 1.; + else speed += delta; + if (speed < 0.1) speed = 0.1; + if (speed > 10) speed = 10; + animgif->speed(speed); + set_title(below->window(), animgif); + } + } +} + +static int events(int event) { + if (event == FL_SHORTCUT) { + if (Fl::event_key() == '+') + change_speed(0.1); + else if (Fl::event_key() == '-') + change_speed(-0.1); + else if (Fl::event_key() == '0') + change_speed(0); + else + return 0; + return 1; + } + return 0; +} + +static const char testsuite[] = "testsuite"; + +int main(int argc, char *argv[]) { + fl_register_images(); + Fl::add_handler(events); + char *openFlags = (char *)calloc(1024, 1); + if (argc > 1) { + // started with argumemts + if (strstr(argv[1], "-h")) { + printf("Usage:\n" + " -t [directory] [-{flags}] open all files in directory (default name: %s) [with options]\n" + " filename [-{flags}] open single file [with options] \n" + " No arguments open a fileselector\n" + " {flags} can be: d=debug mode, u=uncached, D=desaturated, A=color averaged, T=tiled\n" + " m=minimal update, r[scale factor]=resize by 'scale factor'\n" + " Use keys '+'/'-/0' to change speed of the active image (belowmouse).\n", testsuite); + exit(1); + } + for (int i = 1; i < argc; i++) { + if (argv[i][0] == '-') + strcat(openFlags, &argv[i][1]); + } + if (strchr(openFlags, 't')) { // open all GIF-files in a given directory + const char *dir = testsuite; + for (int i = 2; i < argc; i++) + if (argv[i][0] != '-') + dir = argv[i]; + openDirectory(dir, openFlags); + printf("Summary: good=%d, bad=%d, frames=%d\n", g_good_count, g_bad_count, g_frame_count); + } else { // open given file(s) + for (int i = 1; i < argc; i++) + if (argv[i][0] != '-') + openFile(argv[i], openFlags, strchr(openFlags, 'd')); + } + } else { + // started without arguments: choose file + Fl_GIF_Image::animate = true; // create animated shared .GIF images (e.g. file chooser) + while (1) { + Fl::add_timeout(0.1, cb_forced_redraw); // animate images in chooser + const char *filename = fl_file_chooser("Select a GIF image file","*.{gif,GIF}", NULL); + Fl::remove_timeout(cb_forced_redraw); + if (!filename) + break; + Fl_Window *win = openFile(filename, openFlags); + Fl::run(); + // delete last window (which is now just hidden) to test destructors + // NOTE: it is essential that *before* doing this also the + // animated image is destroyed, otherwise it will crash + // because it's canvas will be gone. + // In order to keep this demo simple, the adress of the + // Fl_Anim_GIF_Image has been stored in the window's user_data. + // In a real-life application you will probably store + // it somewhere in the window's or canvas' object and destroy + // the image in the window's or canvas' destructor. + if (win && win->user_data()) + delete ((Fl_Anim_GIF_Image *)win->user_data()); + delete win; + } + } + return Fl::run(); +} |