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A more complex test modeled on the traditional glxgears.
This commit is contained in:
Alexander Larsson 2014-10-09 11:16:11 +02:00 committed by Matthias Clasen
parent 3b3726ae57
commit 8f3e9d1b05
4 changed files with 736 additions and 0 deletions
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6
tests/Makefile.am
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@ -154,6 +154,7 @@ noinst_PROGRAMS = $(TEST_PROGS) \
testactionbar \
testwindowsize \
testpopover \
gdkgears \
$(NULL)
if USE_X11
@ -501,6 +502,11 @@ testtitlebar_SOURCES = testtitlebar.c
testwindowsize_SOURCES = testwindowsize.c
gdkgears_SOURCES = \
gdkgears.c \
gtkgears.c \
gtkgears.h
EXTRA_DIST += \
gradient1.png \
testgtk.1 \

238
tests/gdkgears.c Normal file
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@ -0,0 +1,238 @@
#include <stdlib.h>
#include <gtk/gtk.h>
#include "gtkgears.h"
/************************************************************************
* DEMO CODE *
************************************************************************/
static void
toggle_alpha (GtkWidget *checkbutton,
GtkWidget *gears)
{
gtk_gl_area_set_has_alpha (GTK_GL_AREA (gears),
gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON(checkbutton)));
}
static void
toggle_overlay (GtkWidget *checkbutton,
GtkWidget *revealer)
{
gtk_revealer_set_reveal_child (GTK_REVEALER (revealer),
gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON(checkbutton)));
}
static void
toggle_spin (GtkWidget *checkbutton,
GtkWidget *spinner)
{
if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON(checkbutton)))
gtk_spinner_start (GTK_SPINNER (spinner));
else
gtk_spinner_stop (GTK_SPINNER (spinner));
}
static void
on_axis_value_change (GtkAdjustment *adjustment,
gpointer data)
{
GtkGears *gears = GTK_GEARS (data);
int axis = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (adjustment), "axis"));
gtk_gears_set_axis (gears, axis, gtk_adjustment_get_value (adjustment));
}
static GtkWidget *
create_axis_slider (GtkGears *gears,
int axis)
{
GtkWidget *box, *label, *slider;
GtkAdjustment *adj;
const char *text;
box = gtk_box_new (GTK_ORIENTATION_VERTICAL, FALSE);
switch (axis)
{
case GTK_GEARS_X_AXIS:
text = "X";
break;
case GTK_GEARS_Y_AXIS:
text = "Y";
break;
case GTK_GEARS_Z_AXIS:
text = "Z";
break;
default:
g_assert_not_reached ();
}
label = gtk_label_new (text);
gtk_container_add (GTK_CONTAINER (box), label);
gtk_widget_show (label);
adj = gtk_adjustment_new (gtk_gears_get_axis (gears, axis), 0.0, 360.0, 1.0, 12.0, 0.0);
g_object_set_data (G_OBJECT (adj), "axis", GINT_TO_POINTER (axis));
g_signal_connect (adj, "value-changed",
G_CALLBACK (on_axis_value_change),
gears);
slider = gtk_scale_new (GTK_ORIENTATION_VERTICAL, adj);
gtk_scale_set_draw_value (GTK_SCALE (slider), FALSE);
gtk_container_add (GTK_CONTAINER (box), slider);
gtk_widget_set_vexpand (slider, TRUE);
gtk_widget_show (slider);
gtk_widget_show (box);
return box;
}
static void
moar_gears (GtkButton *button, gpointer data)
{
GtkContainer *container = GTK_CONTAINER (data);
GtkWidget *gears;
gears = gtk_gears_new ();
gtk_widget_set_size_request (gears, 100, 100);
gtk_container_add (container, gears);
gtk_widget_show (gears);
}
int
main (int argc, char *argv[])
{
GtkWidget *window, *box, *hbox, *button, *spinner, *check,
*fps_label, *gears, *extra_hbox, *bbox, *overlay,
*revealer, *frame, *label, *scrolled;
int i;
gtk_init (&argc, &argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_title (GTK_WINDOW (window), "GdkGears");
gtk_window_set_default_size (GTK_WINDOW (window), 640, 640);
gtk_container_set_border_width (GTK_CONTAINER (window), 12);
g_signal_connect (window, "destroy", G_CALLBACK (gtk_main_quit), NULL);
overlay = gtk_overlay_new ();
gtk_container_add (GTK_CONTAINER (window), overlay);
gtk_widget_show (overlay);
revealer = gtk_revealer_new ();
gtk_widget_set_halign (revealer, GTK_ALIGN_END);
gtk_widget_set_valign (revealer, GTK_ALIGN_START);
gtk_overlay_add_overlay (GTK_OVERLAY (overlay),
revealer);
gtk_widget_show (revealer);
frame = gtk_frame_new (NULL);
gtk_style_context_add_class (gtk_widget_get_style_context (frame),
"app-notification");
gtk_container_add (GTK_CONTAINER (revealer), frame);
gtk_widget_show (frame);
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, FALSE);
gtk_box_set_spacing (GTK_BOX (hbox), 6);
gtk_container_add (GTK_CONTAINER (frame), hbox);
gtk_widget_show (hbox);
label = gtk_label_new ("This is a transparent overlay widget!!!!\nAmazing, eh?");
gtk_container_add (GTK_CONTAINER (hbox), label);
gtk_widget_show (label);
box = gtk_box_new (GTK_ORIENTATION_VERTICAL, FALSE);
gtk_box_set_spacing (GTK_BOX (box), 6);
gtk_container_add (GTK_CONTAINER (overlay), box);
gtk_widget_show (box);
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, FALSE);
gtk_box_set_spacing (GTK_BOX (box), 6);
gtk_container_add (GTK_CONTAINER (box), hbox);
gtk_widget_show (hbox);
gears = gtk_gears_new ();
gtk_widget_set_hexpand (gears, TRUE);
gtk_widget_set_vexpand (gears, TRUE);
gtk_container_add (GTK_CONTAINER (hbox), gears);
gtk_widget_show (gears);
for (i = 0; i < GTK_GEARS_N_AXIS; i++)
gtk_container_add (GTK_CONTAINER (hbox), create_axis_slider (GTK_GEARS (gears), i));
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, FALSE);
gtk_box_set_spacing (GTK_BOX (hbox), 6);
gtk_container_add (GTK_CONTAINER (box), hbox);
gtk_widget_show (hbox);
fps_label = gtk_label_new ("");
gtk_container_add (GTK_CONTAINER (hbox), fps_label);
gtk_widget_show (fps_label);
gtk_gears_set_fps_label (GTK_GEARS (gears), GTK_LABEL (fps_label));
spinner = gtk_spinner_new ();
gtk_box_pack_end (GTK_BOX (hbox), spinner, FALSE, FALSE, 0);
gtk_widget_show (spinner);
gtk_spinner_start (GTK_SPINNER (spinner));
check = gtk_check_button_new_with_label ("Animate spinner");
gtk_box_pack_end (GTK_BOX (hbox), check, FALSE, FALSE, 0);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (check), TRUE);
gtk_widget_show (check);
g_signal_connect (check, "toggled",
G_CALLBACK (toggle_spin), spinner);
check = gtk_check_button_new_with_label ("Alpha");
gtk_box_pack_end (GTK_BOX (hbox), check, FALSE, FALSE, 0);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (check), FALSE);
gtk_widget_show (check);
g_signal_connect (check, "toggled",
G_CALLBACK (toggle_alpha), gears);
check = gtk_check_button_new_with_label ("Overlay");
gtk_box_pack_end (GTK_BOX (hbox), check, FALSE, FALSE, 0);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (check), FALSE);
gtk_widget_show (check);
g_signal_connect (check, "toggled",
G_CALLBACK (toggle_overlay), revealer);
scrolled = gtk_scrolled_window_new (NULL, NULL);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled),
GTK_POLICY_AUTOMATIC,
GTK_POLICY_NEVER);
gtk_container_add (GTK_CONTAINER (box), scrolled);
gtk_widget_show (scrolled);
extra_hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, FALSE);
gtk_box_set_spacing (GTK_BOX (extra_hbox), 6);
gtk_container_add (GTK_CONTAINER (scrolled), extra_hbox);
gtk_widget_show (extra_hbox);
bbox = gtk_button_box_new (GTK_ORIENTATION_HORIZONTAL);
gtk_box_set_spacing (GTK_BOX (bbox), 6);
gtk_container_add (GTK_CONTAINER (box), bbox);
gtk_widget_show (bbox);
button = gtk_button_new_with_label ("Moar gears!");
gtk_widget_set_hexpand (button, TRUE);
gtk_container_add (GTK_CONTAINER (bbox), button);
g_signal_connect (button, "clicked", G_CALLBACK (moar_gears), extra_hbox);
gtk_widget_show (button);
button = gtk_button_new_with_label ("Quit");
gtk_widget_set_hexpand (button, TRUE);
gtk_container_add (GTK_CONTAINER (bbox), button);
g_signal_connect_swapped (button, "clicked", G_CALLBACK (gtk_widget_destroy), window);
gtk_widget_show (button);
gtk_widget_show (window);
gtk_main ();
return EXIT_SUCCESS;
}

448
tests/gtkgears.c Normal file
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@ -0,0 +1,448 @@
/* The rendering code in here is taken from glxgears, which has the
* following copyright notice:
*
* Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <math.h>
#include <epoxy/gl.h>
#include "gtkgears.h"
typedef struct {
GLfloat view_rot[GTK_GEARS_N_AXIS];
GLint gear1, gear2, gear3;
GLfloat angle;
gint64 first_frame_time;
guint tick;
GtkLabel *fps_label;
} GtkGearsPrivate;
G_DEFINE_TYPE_WITH_PRIVATE (GtkGears, gtk_gears, GTK_TYPE_GL_AREA);
static gboolean gtk_gears_render (GtkGLArea *area,
GdkGLContext *context);
static void gtk_gears_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_gears_realize (GtkWidget *widget);
static gboolean gtk_gears_tick (GtkWidget *widget,
GdkFrameClock *frame_clock,
gpointer user_data);
GtkWidget *
gtk_gears_new ()
{
GtkWidget *gears;
gears = g_object_new (gtk_gears_get_type (),
"has-depth-buffer", TRUE,
NULL);
return gears;
}
static void
gtk_gears_init (GtkGears *gears)
{
GtkGearsPrivate *priv = gtk_gears_get_instance_private (gears);
priv->view_rot[GTK_GEARS_X_AXIS] = 20.0;
priv->view_rot[GTK_GEARS_Y_AXIS] = 30.0;
priv->view_rot[GTK_GEARS_Z_AXIS] = 20.0;
priv->tick = gtk_widget_add_tick_callback (GTK_WIDGET (gears), gtk_gears_tick, gears, NULL);
}
static void
gtk_gears_finalize (GObject *obj)
{
GtkGears *gears = GTK_GEARS (obj);
GtkGearsPrivate *priv = gtk_gears_get_instance_private (gears);
gtk_widget_remove_tick_callback (GTK_WIDGET (gears), priv->tick);
g_clear_object (&priv->fps_label);
G_OBJECT_CLASS (gtk_gears_parent_class)->finalize (obj);
}
static void
gtk_gears_class_init (GtkGearsClass *klass)
{
GTK_GL_AREA_CLASS (klass)->render = gtk_gears_render;
GTK_WIDGET_CLASS (klass)->realize = gtk_gears_realize;
GTK_WIDGET_CLASS (klass)->size_allocate = gtk_gears_size_allocate;
G_OBJECT_CLASS (klass)->finalize = gtk_gears_finalize;
}
/*
*
* Draw a gear wheel. You'll probably want to call this function when
* building a display list since we do a lot of trig here.
*
* Input: inner_radius - radius of hole at center
* outer_radius - radius at center of teeth
* width - width of gear
* teeth - number of teeth
* tooth_depth - depth of tooth
*/
static void
gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
GLint teeth, GLfloat tooth_depth)
{
GLint i;
GLfloat r0, r1, r2;
GLfloat angle, da;
GLfloat u, v, len;
r0 = inner_radius;
r1 = outer_radius - tooth_depth / 2.0;
r2 = outer_radius + tooth_depth / 2.0;
da = 2.0 * G_PI / teeth / 4.0;
glShadeModel(GL_FLAT);
glNormal3f(0.0, 0.0, 1.0);
/* draw front face */
glBegin(GL_QUAD_STRIP);
for (i = 0; i <= teeth; i++) {
angle = i * 2.0 * M_PI / teeth;
glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
if (i < teeth) {
glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
width * 0.5);
}
}
glEnd();
/* draw front sides of teeth */
glBegin(GL_QUADS);
da = 2.0 * M_PI / teeth / 4.0;
for (i = 0; i < teeth; i++) {
angle = i * 2.0 * M_PI / teeth;
glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
width * 0.5);
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
width * 0.5);
}
glEnd();
glNormal3f(0.0, 0.0, -1.0);
/* draw back face */
glBegin(GL_QUAD_STRIP);
for (i = 0; i <= teeth; i++) {
angle = i * 2.0 * M_PI / teeth;
glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
if (i < teeth) {
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
-width * 0.5);
glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
}
}
glEnd();
/* draw back sides of teeth */
glBegin(GL_QUADS);
da = 2.0 * M_PI / teeth / 4.0;
for (i = 0; i < teeth; i++) {
angle = i * 2.0 * M_PI / teeth;
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
-width * 0.5);
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
-width * 0.5);
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
}
glEnd();
/* draw outward faces of teeth */
glBegin(GL_QUAD_STRIP);
for (i = 0; i < teeth; i++) {
angle = i * 2.0 * M_PI / teeth;
glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
u = r2 * cos(angle + da) - r1 * cos(angle);
v = r2 * sin(angle + da) - r1 * sin(angle);
len = sqrt(u * u + v * v);
u /= len;
v /= len;
glNormal3f(v, -u, 0.0);
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
glNormal3f(cos(angle), sin(angle), 0.0);
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
width * 0.5);
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
-width * 0.5);
u = r1 * cos(angle + 3 * da) - r2 * cos(angle + 2 * da);
v = r1 * sin(angle + 3 * da) - r2 * sin(angle + 2 * da);
glNormal3f(v, -u, 0.0);
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
width * 0.5);
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
-width * 0.5);
glNormal3f(cos(angle), sin(angle), 0.0);
}
glVertex3f(r1 * cos(0), r1 * sin(0), width * 0.5);
glVertex3f(r1 * cos(0), r1 * sin(0), -width * 0.5);
glEnd();
glShadeModel(GL_SMOOTH);
/* draw inside radius cylinder */
glBegin(GL_QUAD_STRIP);
for (i = 0; i <= teeth; i++) {
angle = i * 2.0 * M_PI / teeth;
glNormal3f(-cos(angle), -sin(angle), 0.0);
glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
}
glEnd();
}
/* new window size or exposure */
static void
reshape(int width, int height)
{
GLfloat h = (GLfloat) height / (GLfloat) width;
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glFrustum(-1.0, 1.0, -h, h, 5.0, 60.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glTranslatef(0.0, 0.0, -40.0);
}
static gboolean
gtk_gears_render (GtkGLArea *area,
GdkGLContext *context)
{
GtkGearsPrivate *priv = gtk_gears_get_instance_private (GTK_GEARS (area));
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(priv->view_rot[GTK_GEARS_X_AXIS], 1.0, 0.0, 0.0);
glRotatef(priv->view_rot[GTK_GEARS_Y_AXIS], 0.0, 1.0, 0.0);
glRotatef(priv->view_rot[GTK_GEARS_Z_AXIS], 0.0, 0.0, 1.0);
glPushMatrix();
glTranslatef(-3.0, -2.0, 0.0);
glRotatef(priv->angle, 0.0, 0.0, 1.0);
glCallList(priv->gear1);
glPopMatrix();
glPushMatrix();
glTranslatef(3.1, -2.0, 0.0);
glRotatef(-2.0 * priv->angle - 9.0, 0.0, 0.0, 1.0);
glCallList(priv->gear2);
glPopMatrix();
glPushMatrix();
glTranslatef(-3.1, 4.2, 0.0);
glRotatef(-2.0 * priv->angle - 25.0, 0.0, 0.0, 1.0);
glCallList(priv->gear3);
glPopMatrix();
glPopMatrix();
return TRUE;
}
static void
gtk_gears_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkGLArea *glarea = GTK_GL_AREA (widget);
GTK_WIDGET_CLASS (gtk_gears_parent_class)->size_allocate (widget, allocation);
if (gtk_widget_get_realized (widget))
{
if (!gtk_gl_area_make_current (glarea))
{
g_warning ("Unable to make gl context current");
return;
}
reshape (allocation->width, allocation->height);
}
}
static void
gtk_gears_realize (GtkWidget *widget)
{
GtkGLArea *glarea = GTK_GL_AREA (widget);
GtkGears *gears = GTK_GEARS(widget);
GtkGearsPrivate *priv = gtk_gears_get_instance_private (gears);
GtkAllocation allocation;
static GLfloat pos[4] = { 5.0, 5.0, 10.0, 0.0 };
static GLfloat red[4] = { 0.8, 0.1, 0.0, 1.0 };
static GLfloat green[4] = { 0.0, 0.8, 0.2, 1.0 };
static GLfloat blue[4] = { 0.2, 0.2, 1.0, 1.0 };
GTK_WIDGET_CLASS (gtk_gears_parent_class)->realize (widget);
if (!gtk_gl_area_make_current (glarea))
{
g_warning ("Unable to make gl context current");
return;
}
glLightfv(GL_LIGHT0, GL_POSITION, pos);
glEnable(GL_CULL_FACE);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_DEPTH_TEST);
/* make the gears */
priv->gear1 = glGenLists(1);
glNewList(priv->gear1, GL_COMPILE);
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red);
gear(1.0, 4.0, 1.0, 20, 0.7);
glEndList();
priv->gear2 = glGenLists(1);
glNewList(priv->gear2, GL_COMPILE);
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green);
gear(0.5, 2.0, 2.0, 10, 0.7);
glEndList();
priv->gear3 = glGenLists(1);
glNewList(priv->gear3, GL_COMPILE);
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue);
gear(1.3, 2.0, 0.5, 10, 0.7);
glEndList();
glEnable(GL_NORMALIZE);
gtk_widget_get_allocation (widget, &allocation);
reshape (allocation.width, allocation.height);
}
static gboolean
gtk_gears_tick (GtkWidget *widget,
GdkFrameClock *frame_clock,
gpointer user_data)
{
GtkGears *gears = GTK_GEARS (widget);
GtkGearsPrivate *priv = gtk_gears_get_instance_private (gears);
GdkFrameTimings *timings, *previous_timings;
gint64 previous_frame_time = 0;
gint64 frame_time;
gint64 history_start, history_len;
gint64 frame;
char *s;
frame = gdk_frame_clock_get_frame_counter (frame_clock);
frame_time = gdk_frame_clock_get_frame_time (frame_clock);
if (priv->first_frame_time == 0)
{
/* No need for changes on first frame */
priv->first_frame_time = frame_time;
if (priv->fps_label)
gtk_label_set_label (priv->fps_label, "FPS: ---");
return G_SOURCE_CONTINUE;
}
/* glxgears advances 70 degrees per second, so do the same */
priv->angle = fmod ((frame_time - priv->first_frame_time) / (double)G_USEC_PER_SEC * 70.0, 360.0);
gtk_widget_queue_draw (widget);
history_start = gdk_frame_clock_get_history_start (frame_clock);
if (priv->fps_label && frame % 60 == 0)
{
history_len = frame - history_start;
if (history_len > 0)
{
previous_timings = gdk_frame_clock_get_timings (frame_clock, frame - history_len);
previous_frame_time = gdk_frame_timings_get_frame_time (previous_timings);
s = g_strdup_printf ("FPS: %-4.1f", (G_USEC_PER_SEC * history_len) / (double)(frame_time - previous_frame_time));
gtk_label_set_label (priv->fps_label, s);
g_free (s);
}
}
timings = gdk_frame_clock_get_current_timings (frame_clock);
previous_timings = gdk_frame_clock_get_timings (frame_clock,
gdk_frame_timings_get_frame_counter (timings) - 1);
if (previous_timings != NULL)
previous_frame_time = gdk_frame_timings_get_frame_time (previous_timings);
return G_SOURCE_CONTINUE;
}
void
gtk_gears_set_axis (GtkGears *gears, int axis, double value)
{
GtkGearsPrivate *priv = gtk_gears_get_instance_private (gears);
if (axis < 0 || axis >= GTK_GEARS_N_AXIS)
return;
priv->view_rot[axis] = value;
gtk_widget_queue_draw (GTK_WIDGET (gears));
}
double
gtk_gears_get_axis (GtkGears *gears, int axis)
{
GtkGearsPrivate *priv = gtk_gears_get_instance_private (gears);
if (axis < 0 || axis >= GTK_GEARS_N_AXIS)
return 0.0;
return priv->view_rot[axis];
}
void
gtk_gears_set_fps_label (GtkGears *gears, GtkLabel *label)
{
GtkGearsPrivate *priv = gtk_gears_get_instance_private (gears);
if (label)
g_object_ref (label);
g_clear_object (&priv->fps_label);
priv->fps_label = label;
}

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tests/gtkgears.h Normal file
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#ifndef __GTK_GEARS_H__
#define __GTK_GEARS_H__
#include <gtk/gtk.h>
G_BEGIN_DECLS
enum {
GTK_GEARS_X_AXIS,
GTK_GEARS_Y_AXIS,
GTK_GEARS_Z_AXIS,
GTK_GEARS_N_AXIS
};
#define GTK_TYPE_GEARS (gtk_gears_get_type ())
#define GTK_GEARS(inst) (G_TYPE_CHECK_INSTANCE_CAST ((inst), \
GTK_TYPE_GEARS, \
GtkGears))
#define GTK_IS_GEARS(inst) (G_TYPE_CHECK_INSTANCE_TYPE ((inst), \
GTK_TYPE_GEARS))
typedef struct {
GtkGLArea parent;
} GtkGears;
typedef struct {
GtkGLAreaClass parent_class;
} GtkGearsClass;
GtkWidget *gtk_gears_new ();
void gtk_gears_set_axis (GtkGears *gears,
int axis,
double value);
double gtk_gears_get_axis (GtkGears *gears,
int axis);
void gtk_gears_set_fps_label (GtkGears *gears,
GtkLabel *label);
G_END_DECLS
#endif /* __GTK_GEARS_H__ */