From a4f9d20ae1fc1040ba1481f02560697c38856ede Mon Sep 17 00:00:00 2001 From: Alexander Larsson Date: Thu, 4 Sep 2014 11:03:49 +0200 Subject: [PATCH] Add gdkgears test This is a version of the traditional glxgears app that uses the gdk gl integration for the setup and integration. It also has some extra features like an animated gtk widget (spinner) that is synced with the gl drawing, and support for multiple instances of the gears. --- tests/Makefile.am | 1 + tests/gdkgears.c | 634 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 635 insertions(+) create mode 100644 tests/gdkgears.c diff --git a/tests/Makefile.am b/tests/Makefile.am index 861ee463dbd..483e5a09e8c 100644 --- a/tests/Makefile.am +++ b/tests/Makefile.am @@ -150,6 +150,7 @@ noinst_PROGRAMS = $(TEST_PROGS) \ testactionbar \ testwindowsize \ testpopover \ + gdkgears \ $(NULL) if USE_X11 diff --git a/tests/gdkgears.c b/tests/gdkgears.c new file mode 100644 index 00000000000..10ffdde9636 --- /dev/null +++ b/tests/gdkgears.c @@ -0,0 +1,634 @@ +#include +#include +#include + +#include + +/* 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. + */ + +enum { + X_AXIS, + Y_AXIS, + Z_AXIS, + + 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; + + GLfloat view_rot[N_AXIS]; + GLint gear1, gear2, gear3; + GLfloat angle; + gint64 first_frame_time; + guint tick; + GtkLabel *fps_label; +} GtkGears; + +typedef struct { + GtkGLAreaClass parent_class; +} GtkGearsClass; + +G_DEFINE_TYPE (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 () +{ + GdkGLPixelFormat *pixel_format; + GtkWidget *gears; + + pixel_format = gdk_gl_pixel_format_new ("double-buffer", TRUE, + NULL); + + gears = g_object_new (gtk_gears_get_type (), + "pixel-format", pixel_format, + NULL); + + g_object_unref (pixel_format); + + return gears; +} + +static void +gtk_gears_init (GtkGears *gears) +{ + gears->view_rot[X_AXIS] = 20.0; + gears->view_rot[Y_AXIS] = 30.0; + gears->view_rot[Z_AXIS] = 20.0; + + gears->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); + + gtk_widget_remove_tick_callback (GTK_WIDGET (gears), gears->tick); + + g_clear_object (&gears->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) +{ + GtkGears *gears = GTK_GEARS(area); + + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + + glPushMatrix(); + glRotatef(gears->view_rot[X_AXIS], 1.0, 0.0, 0.0); + glRotatef(gears->view_rot[Y_AXIS], 0.0, 1.0, 0.0); + glRotatef(gears->view_rot[Z_AXIS], 0.0, 0.0, 1.0); + + glPushMatrix(); + glTranslatef(-3.0, -2.0, 0.0); + glRotatef(gears->angle, 0.0, 0.0, 1.0); + glCallList(gears->gear1); + glPopMatrix(); + + glPushMatrix(); + glTranslatef(3.1, -2.0, 0.0); + glRotatef(-2.0 * gears->angle - 9.0, 0.0, 0.0, 1.0); + glCallList(gears->gear2); + glPopMatrix(); + + glPushMatrix(); + glTranslatef(-3.1, 4.2, 0.0); + glRotatef(-2.0 * gears->angle - 25.0, 0.0, 0.0, 1.0); + glCallList(gears->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); + 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 */ + gears->gear1 = glGenLists(1); + glNewList(gears->gear1, GL_COMPILE); + glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red); + gear(1.0, 4.0, 1.0, 20, 0.7); + glEndList(); + + gears->gear2 = glGenLists(1); + glNewList(gears->gear2, GL_COMPILE); + glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green); + gear(0.5, 2.0, 2.0, 10, 0.7); + glEndList(); + + gears->gear3 = glGenLists(1); + glNewList(gears->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); + 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 (gears->first_frame_time == 0) + { + /* No need for changes on first frame */ + gears->first_frame_time = frame_time; + if (gears->fps_label) + gtk_label_set_label (gears->fps_label, "FPS: ---"); + return G_SOURCE_CONTINUE; + } + + /* glxgears advances 70 degrees per second, so do the same */ + + gears->angle = fmod ((frame_time - gears->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 (gears->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 (gears->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) +{ + if (axis < 0 || axis >= N_AXIS) + return; + + gears->view_rot[axis] = value; + + gtk_widget_queue_draw (GTK_WIDGET (gears)); +} + +double +gtk_gears_get_axis (GtkGears *gears, int axis) +{ + if (axis < 0 || axis >= N_AXIS) + return 0.0; + + return gears->view_rot[axis]; +} + +void +gtk_gears_set_fps_label (GtkGears *gears, GtkLabel *label) +{ + if (label) + g_object_ref (label); + + g_clear_object (&gears->fps_label); + + gears->fps_label = label; +} + +/************************************************************************ + * DEMO CODE * + ************************************************************************/ + +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 X_AXIS: + text = "X"; + break; + + case Y_AXIS: + text = "Y"; + break; + + case 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; + 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); + + box = gtk_box_new (GTK_ORIENTATION_VERTICAL, FALSE); + gtk_box_set_spacing (GTK_BOX (box), 6); + gtk_container_add (GTK_CONTAINER (window), 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 < 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); + + + extra_hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, FALSE); + gtk_box_set_spacing (GTK_BOX (extra_hbox), 6); + gtk_container_add (GTK_CONTAINER (box), 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; +}