mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-09-20 05:50:11 +00:00
352 lines
12 KiB
C
352 lines
12 KiB
C
/* OpenGL/Transitions and Effects
|
|
* #Keywords: OpenGL, shader, effect
|
|
*
|
|
* Create transitions between pages using a custom fragment shader.
|
|
*
|
|
* The example transitions here are taken from gl-transitions.com, and you
|
|
* can edit the shader code itself on the last page of the stack.
|
|
*
|
|
* The transitions work with arbitrary content. We use images, shaders
|
|
* GL areas and plain old widgets to demonstrate this.
|
|
*
|
|
* The demo also shows some over-the-top effects like wobbly widgets,
|
|
* and animated backgrounds.
|
|
*/
|
|
|
|
#include <math.h>
|
|
#include <gtk/gtk.h>
|
|
#include "gtkshaderstack.h"
|
|
#include "gtkshaderbin.h"
|
|
#include "gtkshadertoy.h"
|
|
#include "gskshaderpaintable.h"
|
|
|
|
static GtkWidget *demo_window = NULL;
|
|
|
|
static void
|
|
close_window (GtkWidget *widget)
|
|
{
|
|
/* Reset the state */
|
|
demo_window = NULL;
|
|
}
|
|
|
|
static void
|
|
text_changed (GtkTextBuffer *buffer,
|
|
GtkWidget *button)
|
|
{
|
|
gtk_widget_show (button);
|
|
}
|
|
|
|
static void
|
|
apply_text (GtkWidget *button,
|
|
GtkTextBuffer *buffer)
|
|
{
|
|
GtkWidget *stack;
|
|
GskGLShader *shader;
|
|
GtkTextIter start, end;
|
|
char *text;
|
|
|
|
stack = g_object_get_data (G_OBJECT (button), "the-stack");
|
|
|
|
gtk_text_buffer_get_bounds (buffer, &start, &end);
|
|
text = gtk_text_buffer_get_text (buffer, &start, &end, TRUE);
|
|
|
|
GBytes *bytes = g_bytes_new_take (text, strlen (text));
|
|
shader = gsk_gl_shader_new_from_bytes (bytes);
|
|
|
|
gtk_shader_stack_set_shader (GTK_SHADER_STACK (stack), shader);
|
|
|
|
g_object_unref (shader);
|
|
g_bytes_unref (bytes);
|
|
|
|
gtk_widget_hide (button);
|
|
}
|
|
|
|
static void
|
|
go_back (GtkWidget *button,
|
|
GtkWidget *stack)
|
|
{
|
|
gtk_shader_stack_transition (GTK_SHADER_STACK (stack), FALSE);
|
|
}
|
|
|
|
static void
|
|
go_forward (GtkWidget *button,
|
|
GtkWidget *stack)
|
|
{
|
|
gtk_shader_stack_transition (GTK_SHADER_STACK (stack), TRUE);
|
|
}
|
|
|
|
static void
|
|
clicked_cb (GtkGestureClick *gesture,
|
|
guint n_pressed,
|
|
double x,
|
|
double y,
|
|
gpointer data)
|
|
{
|
|
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_CLAIMED);
|
|
}
|
|
|
|
static GtkWidget *
|
|
ripple_bin_new (void)
|
|
{
|
|
GtkWidget *bin = gtk_shader_bin_new ();
|
|
static GskGLShader *shader = NULL;
|
|
|
|
if (shader == NULL)
|
|
shader = gsk_gl_shader_new_from_resource ("/gltransition/ripple.glsl");
|
|
|
|
gtk_shader_bin_add_shader (GTK_SHADER_BIN (bin), shader, GTK_STATE_FLAG_PRELIGHT, GTK_STATE_FLAG_PRELIGHT, 20);
|
|
|
|
return bin;
|
|
}
|
|
|
|
static GtkWidget *
|
|
new_shadertoy (const char *path)
|
|
{
|
|
GBytes *shader;
|
|
GtkWidget *toy;
|
|
|
|
toy = gtk_shadertoy_new ();
|
|
shader = g_resources_lookup_data (path, 0, NULL);
|
|
gtk_shadertoy_set_image_shader (GTK_SHADERTOY (toy),
|
|
g_bytes_get_data (shader, NULL));
|
|
g_bytes_unref (shader);
|
|
|
|
return toy;
|
|
}
|
|
|
|
static gboolean
|
|
update_paintable (GtkWidget *widget,
|
|
GdkFrameClock *frame_clock,
|
|
gpointer user_data)
|
|
{
|
|
GskShaderPaintable *paintable;
|
|
gint64 frame_time;
|
|
|
|
paintable = GSK_SHADER_PAINTABLE (gtk_picture_get_paintable (GTK_PICTURE (widget)));
|
|
frame_time = gdk_frame_clock_get_frame_time (frame_clock);
|
|
gsk_shader_paintable_update_time (paintable, 0, frame_time);
|
|
|
|
return G_SOURCE_CONTINUE;
|
|
}
|
|
|
|
static GtkWidget *
|
|
make_shader_stack (const char *name,
|
|
const char *resource_path,
|
|
int active_child,
|
|
GtkWidget *scale)
|
|
{
|
|
GtkWidget *stack, *child, *widget, *vbox, *hbox, *bin;
|
|
GtkWidget *label, *button, *tv;
|
|
GskGLShader *shader;
|
|
GObjectClass *class;
|
|
GParamSpecFloat *pspec;
|
|
GtkAdjustment *adjustment;
|
|
GtkTextBuffer *buffer;
|
|
GBytes *bytes;
|
|
GtkEventController *controller;
|
|
GtkCssProvider *provider;
|
|
GdkPaintable *paintable;
|
|
|
|
stack = gtk_shader_stack_new ();
|
|
shader = gsk_gl_shader_new_from_resource (resource_path);
|
|
gtk_shader_stack_set_shader (GTK_SHADER_STACK (stack), shader);
|
|
g_object_unref (shader);
|
|
|
|
child = gtk_picture_new_for_resource ("/css_blendmodes/ducky.png");
|
|
gtk_picture_set_can_shrink (GTK_PICTURE (child), TRUE);
|
|
gtk_shader_stack_add_child (GTK_SHADER_STACK (stack), child);
|
|
|
|
shader = gsk_gl_shader_new_from_resource ("/gltransition/cogs2.glsl");
|
|
paintable = gsk_shader_paintable_new (shader, NULL);
|
|
|
|
child = gtk_picture_new_for_paintable (paintable);
|
|
gtk_widget_add_tick_callback (child, update_paintable, NULL, NULL);
|
|
gtk_picture_set_can_shrink (GTK_PICTURE (child), TRUE);
|
|
gtk_shader_stack_add_child (GTK_SHADER_STACK (stack), child);
|
|
|
|
child = gtk_picture_new_for_resource ("/transparent/portland-rose.jpg");
|
|
gtk_picture_set_can_shrink (GTK_PICTURE (child), TRUE);
|
|
gtk_shader_stack_add_child (GTK_SHADER_STACK (stack), child);
|
|
|
|
child = new_shadertoy ("/shadertoy/neon.glsl");
|
|
gtk_shader_stack_add_child (GTK_SHADER_STACK (stack), child);
|
|
|
|
child = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);
|
|
|
|
class = g_type_class_ref (GTK_TYPE_SHADER_STACK);
|
|
pspec = G_PARAM_SPEC_FLOAT (g_object_class_find_property (class, "duration"));
|
|
|
|
adjustment = gtk_range_get_adjustment (GTK_RANGE (scale));
|
|
if (gtk_adjustment_get_lower (adjustment) == 0.0 &&
|
|
gtk_adjustment_get_upper (adjustment) == 0.0)
|
|
{
|
|
gtk_adjustment_configure (adjustment,
|
|
pspec->default_value,
|
|
pspec->minimum,
|
|
pspec->maximum,
|
|
0.1, 0.5, 0);
|
|
}
|
|
|
|
g_type_class_unref (class);
|
|
|
|
g_object_bind_property (adjustment, "value",
|
|
stack, "duration",
|
|
G_BINDING_DEFAULT);
|
|
|
|
widget = gtk_scrolled_window_new ();
|
|
gtk_scrolled_window_set_has_frame (GTK_SCROLLED_WINDOW (widget), TRUE);
|
|
gtk_widget_set_hexpand (widget, TRUE);
|
|
gtk_widget_set_vexpand (widget, TRUE);
|
|
|
|
controller = GTK_EVENT_CONTROLLER (gtk_gesture_click_new ());
|
|
gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (controller), 0);
|
|
g_signal_connect (controller, "released", G_CALLBACK (clicked_cb), NULL);
|
|
gtk_event_controller_set_propagation_phase (controller, GTK_PHASE_BUBBLE);
|
|
gtk_widget_add_controller (GTK_WIDGET (widget), controller);
|
|
|
|
tv = gtk_text_view_new ();
|
|
gtk_text_view_set_left_margin (GTK_TEXT_VIEW (tv), 4);
|
|
gtk_text_view_set_right_margin (GTK_TEXT_VIEW (tv), 4);
|
|
gtk_text_view_set_top_margin (GTK_TEXT_VIEW (tv), 4);
|
|
gtk_text_view_set_bottom_margin (GTK_TEXT_VIEW (tv), 4);
|
|
buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (tv));
|
|
bytes = g_resources_lookup_data (resource_path, 0, NULL);
|
|
gtk_text_buffer_set_text (buffer,
|
|
(const char *)g_bytes_get_data (bytes, NULL),
|
|
g_bytes_get_size (bytes));
|
|
g_bytes_unref (bytes);
|
|
gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (widget), tv);
|
|
|
|
gtk_box_append (GTK_BOX (child), widget);
|
|
|
|
gtk_shader_stack_add_child (GTK_SHADER_STACK (stack), child);
|
|
|
|
gtk_shader_stack_set_active (GTK_SHADER_STACK (stack), active_child);
|
|
|
|
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);
|
|
|
|
widget = gtk_center_box_new ();
|
|
label = gtk_label_new (name);
|
|
gtk_widget_add_css_class (label, "title-4");
|
|
gtk_widget_set_size_request (label, -1, 26);
|
|
gtk_center_box_set_center_widget (GTK_CENTER_BOX (widget), label);
|
|
|
|
button = gtk_button_new_from_icon_name ("view-refresh-symbolic");
|
|
g_signal_connect (buffer, "changed", G_CALLBACK (text_changed), button);
|
|
g_object_set_data (G_OBJECT (button), "the-stack", stack);
|
|
g_signal_connect (button, "clicked", G_CALLBACK (apply_text), buffer);
|
|
provider = gtk_css_provider_new ();
|
|
gtk_css_provider_load_from_data (provider, "button.small { padding: 0; }", -1);
|
|
gtk_style_context_add_provider (gtk_widget_get_style_context (button),
|
|
GTK_STYLE_PROVIDER (provider),
|
|
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
|
|
g_object_unref (provider);
|
|
gtk_widget_set_halign (button, GTK_ALIGN_CENTER);
|
|
gtk_widget_set_valign (button, GTK_ALIGN_CENTER);
|
|
gtk_widget_add_css_class (button, "small");
|
|
gtk_widget_hide (button);
|
|
gtk_center_box_set_end_widget (GTK_CENTER_BOX (widget), button);
|
|
|
|
gtk_box_append (GTK_BOX (vbox), widget);
|
|
|
|
GtkWidget *bin2 = ripple_bin_new ();
|
|
gtk_shader_bin_set_child (GTK_SHADER_BIN (bin2), stack);
|
|
|
|
gtk_box_append (GTK_BOX (vbox), bin2);
|
|
|
|
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
|
|
gtk_widget_set_halign (hbox, GTK_ALIGN_CENTER);
|
|
|
|
gtk_box_append (GTK_BOX (vbox), hbox);
|
|
|
|
button = gtk_button_new_from_icon_name ("go-previous-symbolic");
|
|
g_signal_connect (button, "clicked", G_CALLBACK (go_back), stack);
|
|
bin = ripple_bin_new ();
|
|
gtk_shader_bin_set_child (GTK_SHADER_BIN (bin), button);
|
|
gtk_box_append (GTK_BOX (hbox), bin);
|
|
|
|
button = gtk_button_new_from_icon_name ("go-next-symbolic");
|
|
g_signal_connect (button, "clicked", G_CALLBACK (go_forward), stack);
|
|
bin = ripple_bin_new ();
|
|
gtk_shader_bin_set_child (GTK_SHADER_BIN (bin), button);
|
|
gtk_box_append (GTK_BOX (hbox), bin);
|
|
|
|
return vbox;
|
|
}
|
|
|
|
static GtkWidget *
|
|
create_gltransition_window (GtkWidget *do_widget)
|
|
{
|
|
GtkWidget *window, *headerbar, *scale, *outer_grid, *grid, *background;
|
|
GdkPaintable *paintable;
|
|
|
|
window = gtk_window_new ();
|
|
gtk_window_set_display (GTK_WINDOW (window), gtk_widget_get_display (do_widget));
|
|
gtk_window_set_title (GTK_WINDOW (window), "Transitions and Effects");
|
|
headerbar = gtk_header_bar_new ();
|
|
scale = gtk_scale_new (GTK_ORIENTATION_HORIZONTAL, NULL);
|
|
gtk_scale_set_draw_value (GTK_SCALE (scale), FALSE);
|
|
gtk_widget_set_size_request (scale, 100, -1);
|
|
gtk_widget_set_tooltip_text (scale, "Transition duration");
|
|
gtk_header_bar_pack_end (GTK_HEADER_BAR (headerbar), scale);
|
|
gtk_window_set_titlebar (GTK_WINDOW (window), headerbar);
|
|
gtk_window_set_default_size (GTK_WINDOW (window), 800, 600);
|
|
g_signal_connect (window, "destroy", G_CALLBACK (close_window), NULL);
|
|
|
|
outer_grid = gtk_grid_new ();
|
|
gtk_window_set_child (GTK_WINDOW (window), outer_grid);
|
|
|
|
paintable = gsk_shader_paintable_new (gsk_gl_shader_new_from_resource ("/gltransition/background.glsl"), NULL);
|
|
background = gtk_picture_new_for_paintable (paintable);
|
|
gtk_widget_add_tick_callback (background, update_paintable, NULL, NULL);
|
|
|
|
gtk_grid_attach (GTK_GRID (outer_grid),
|
|
background,
|
|
0, 0, 1, 1);
|
|
|
|
grid = gtk_grid_new ();
|
|
gtk_grid_attach (GTK_GRID (outer_grid),
|
|
grid,
|
|
0, 0, 1, 1);
|
|
|
|
gtk_widget_set_halign (grid, GTK_ALIGN_CENTER);
|
|
gtk_widget_set_valign (grid, GTK_ALIGN_CENTER);
|
|
gtk_widget_set_margin_start (grid, 12);
|
|
gtk_widget_set_margin_end (grid, 12);
|
|
gtk_widget_set_margin_top (grid, 12);
|
|
gtk_widget_set_margin_bottom (grid, 12);
|
|
gtk_grid_set_row_spacing (GTK_GRID (grid), 6);
|
|
gtk_grid_set_column_spacing (GTK_GRID (grid), 6);
|
|
gtk_grid_set_row_homogeneous (GTK_GRID (grid), TRUE);
|
|
gtk_grid_set_column_homogeneous (GTK_GRID (grid), TRUE);
|
|
|
|
gtk_grid_attach (GTK_GRID (grid),
|
|
make_shader_stack ("Wind", "/gltransition/wind.glsl", 0, scale),
|
|
0, 0, 1, 1);
|
|
gtk_grid_attach (GTK_GRID (grid),
|
|
make_shader_stack ("Radial", "/gltransition/radial.glsl", 1, scale),
|
|
1, 0, 1, 1);
|
|
gtk_grid_attach (GTK_GRID (grid),
|
|
make_shader_stack ("Crosswarp", "/gltransition/crosswarp.glsl", 2, scale),
|
|
0, 1, 1, 1);
|
|
gtk_grid_attach (GTK_GRID (grid),
|
|
make_shader_stack ("Kaleidoscope", "/gltransition/kaleidoscope.glsl", 3, scale),
|
|
1, 1, 1, 1);
|
|
|
|
return window;
|
|
}
|
|
|
|
GtkWidget *
|
|
do_gltransition (GtkWidget *do_widget)
|
|
{
|
|
if (!demo_window)
|
|
demo_window = create_gltransition_window (do_widget);
|
|
|
|
if (!gtk_widget_get_visible (demo_window))
|
|
gtk_widget_show (demo_window);
|
|
else
|
|
gtk_window_destroy (GTK_WINDOW (demo_window));
|
|
|
|
return demo_window;
|
|
}
|