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Open Source Computer Vision Library https://opencv.org/
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opencv/modules/highgui/src/window_gtk.cpp

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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
//
//
// Intel License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2000, Intel Corporation, all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * The name of Intel Corporation may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/
#include "precomp.hpp"
#ifndef WIN32
#ifdef HAVE_GTK
#include "gtk/gtk.h"
#include "gdk/gdkkeysyms.h"
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <stdio.h>
#ifdef HAVE_OPENGL
#include <gtk/gtkgl.h>
#include <GL/gl.h>
#include <GL/glu.h>
#endif
// TODO Fix the initial window size when flags=0. Right now the initial window is by default
// 320x240 size. A better default would be actual size of the image. Problem
// is determining desired window size with trackbars while still allowing resizing.
//
// Gnome Totem source may be of use here, see bacon_video_widget_set_scale_ratio
// in totem/src/backend/bacon-video-widget-xine.c
////////////////////////////////////////////////////////////
// CvImageWidget GTK Widget Public API
////////////////////////////////////////////////////////////
typedef struct _CvImageWidget CvImageWidget;
typedef struct _CvImageWidgetClass CvImageWidgetClass;
struct _CvImageWidget {
GtkWidget widget;
CvMat * original_image;
CvMat * scaled_image;
int flags;
};
struct _CvImageWidgetClass
{
GtkWidgetClass parent_class;
};
/** Allocate new image viewer widget */
GtkWidget* cvImageWidgetNew (int flags);
/** Set the image to display in the widget */
void cvImageWidgetSetImage(CvImageWidget * widget, const CvArr *arr);
// standard GTK object macros
#define CV_IMAGE_WIDGET(obj) G_TYPE_CHECK_INSTANCE_CAST (obj, cvImageWidget_get_type (), CvImageWidget)
#define CV_IMAGE_WIDGET_CLASS(klass) GTK_CHECK_CLASS_CAST (klass, cvImageWidget_get_type (), CvImageWidgetClass)
#define CV_IS_IMAGE_WIDGET(obj) G_TYPE_CHECK_INSTANCE_TYPE (obj, cvImageWidget_get_type ())
/////////////////////////////////////////////////////////////////////////////
// Private API ////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
GType cvImageWidget_get_type (void);
static GtkWidgetClass * parent_class = NULL;
// flag to help size initial window
#define CV_WINDOW_NO_IMAGE 2
void cvImageWidgetSetImage(CvImageWidget * widget, const CvArr *arr){
CvMat * mat, stub;
int origin=0;
//printf("cvImageWidgetSetImage\n");
if( CV_IS_IMAGE_HDR( arr ))
origin = ((IplImage*)arr)->origin;
mat = cvGetMat(arr, &stub);
if(widget->original_image && !CV_ARE_SIZES_EQ(mat, widget->original_image)){
cvReleaseMat( &widget->original_image );
}
if(!widget->original_image){
widget->original_image = cvCreateMat( mat->rows, mat->cols, CV_8UC3 );
gtk_widget_queue_resize( GTK_WIDGET( widget ) );
}
cvConvertImage( mat, widget->original_image,
(origin != 0 ? CV_CVTIMG_FLIP : 0) + CV_CVTIMG_SWAP_RB );
if(widget->scaled_image){
cvResize( widget->original_image, widget->scaled_image, CV_INTER_AREA );
}
// window does not refresh without this
gtk_widget_queue_draw( GTK_WIDGET(widget) );
}
GtkWidget*
cvImageWidgetNew (int flags)
{
CvImageWidget *image_widget;
image_widget = CV_IMAGE_WIDGET( gtk_widget_new (cvImageWidget_get_type (), NULL) );
image_widget->original_image = 0;
image_widget->scaled_image = 0;
image_widget->flags = flags | CV_WINDOW_NO_IMAGE;
return GTK_WIDGET (image_widget);
}
static void
cvImageWidget_realize (GtkWidget *widget)
{
GdkWindowAttr attributes;
gint attributes_mask;
//printf("cvImageWidget_realize\n");
g_return_if_fail (widget != NULL);
g_return_if_fail (CV_IS_IMAGE_WIDGET (widget));
gtk_widget_set_realized(widget, TRUE);
attributes.x = widget->allocation.x;
attributes.y = widget->allocation.y;
attributes.width = widget->allocation.width;
attributes.height = widget->allocation.height;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.window_type = GDK_WINDOW_CHILD;
attributes.event_mask = gtk_widget_get_events (widget) |
GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK;
attributes.visual = gtk_widget_get_visual (widget);
attributes.colormap = gtk_widget_get_colormap (widget);
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
widget->window = gdk_window_new (widget->parent->window, &attributes, attributes_mask);
widget->style = gtk_style_attach (widget->style, widget->window);
gdk_window_set_user_data (widget->window, widget);
gtk_style_set_background (widget->style, widget->window, GTK_STATE_ACTIVE);
}
static CvSize cvImageWidget_calc_size( int im_width, int im_height, int max_width, int max_height ){
float aspect = (float)im_width/(float)im_height;
float max_aspect = (float)max_width/(float)max_height;
if(aspect > max_aspect){
return cvSize( max_width, cvRound(max_width/aspect) );
}
return cvSize( cvRound(max_height*aspect), max_height );
}
static void
cvImageWidget_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
CvImageWidget * image_widget = CV_IMAGE_WIDGET( widget );
//printf("cvImageWidget_size_request ");
// the case the first time cvShowImage called or when AUTOSIZE
if( image_widget->original_image &&
((image_widget->flags & CV_WINDOW_AUTOSIZE) ||
(image_widget->flags & CV_WINDOW_NO_IMAGE)))
{
//printf("original ");
requisition->width = image_widget->original_image->cols;
requisition->height = image_widget->original_image->rows;
}
// default case
else if(image_widget->scaled_image){
//printf("scaled ");
requisition->width = image_widget->scaled_image->cols;
requisition->height = image_widget->scaled_image->rows;
}
// the case before cvShowImage called
else{
//printf("default ");
requisition->width = 320;
requisition->height = 240;
}
//printf("%d %d\n",requisition->width, requisition->height);
}
static void cvImageWidget_set_size(GtkWidget * widget, int max_width, int max_height){
CvImageWidget * image_widget = CV_IMAGE_WIDGET( widget );
//printf("cvImageWidget_set_size %d %d\n", max_width, max_height);
// don't allow to set the size
if(image_widget->flags & CV_WINDOW_AUTOSIZE) return;
if(!image_widget->original_image) return;
CvSize scaled_image_size = cvImageWidget_calc_size( image_widget->original_image->cols,
image_widget->original_image->rows, max_width, max_height );
if( image_widget->scaled_image &&
( image_widget->scaled_image->cols != scaled_image_size.width ||
image_widget->scaled_image->rows != scaled_image_size.height ))
{
cvReleaseMat( &image_widget->scaled_image );
}
if( !image_widget->scaled_image ){
image_widget->scaled_image = cvCreateMat( scaled_image_size.height, scaled_image_size.width, CV_8UC3 );
}
assert( image_widget->scaled_image );
}
static void
cvImageWidget_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
CvImageWidget *image_widget;
//printf("cvImageWidget_size_allocate\n");
g_return_if_fail (widget != NULL);
g_return_if_fail (CV_IS_IMAGE_WIDGET (widget));
g_return_if_fail (allocation != NULL);
widget->allocation = *allocation;
image_widget = CV_IMAGE_WIDGET (widget);
if( (image_widget->flags & CV_WINDOW_AUTOSIZE)==0 && image_widget->original_image ){
// (re) allocated scaled image
if( image_widget->flags & CV_WINDOW_NO_IMAGE ){
cvImageWidget_set_size( widget, image_widget->original_image->cols,
image_widget->original_image->rows);
}
else{
cvImageWidget_set_size( widget, allocation->width, allocation->height );
}
cvResize( image_widget->original_image, image_widget->scaled_image, CV_INTER_AREA );
}
if (gtk_widget_get_realized (widget))
{
image_widget = CV_IMAGE_WIDGET (widget);
if( image_widget->original_image &&
((image_widget->flags & CV_WINDOW_AUTOSIZE) ||
(image_widget->flags & CV_WINDOW_NO_IMAGE)) )
{
widget->allocation.width = image_widget->original_image->cols;
widget->allocation.height = image_widget->original_image->rows;
gdk_window_move_resize( widget->window, allocation->x, allocation->y,
image_widget->original_image->cols, image_widget->original_image->rows );
if(image_widget->flags & CV_WINDOW_NO_IMAGE){
image_widget->flags &= ~CV_WINDOW_NO_IMAGE;
gtk_widget_queue_resize( GTK_WIDGET(widget) );
}
}
else{
gdk_window_move_resize (widget->window,
allocation->x, allocation->y,
allocation->width, allocation->height );
}
}
}
static void
cvImageWidget_destroy (GtkObject *object)
{
CvImageWidget *image_widget;
g_return_if_fail (object != NULL);
g_return_if_fail (CV_IS_IMAGE_WIDGET (object));
image_widget = CV_IMAGE_WIDGET (object);
cvReleaseMat( &image_widget->scaled_image );
cvReleaseMat( &image_widget->original_image );
if (GTK_OBJECT_CLASS (parent_class)->destroy)
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
static void cvImageWidget_class_init (CvImageWidgetClass * klass)
{
GtkObjectClass *object_class;
GtkWidgetClass *widget_class;
object_class = (GtkObjectClass*) klass;
widget_class = (GtkWidgetClass*) klass;
parent_class = GTK_WIDGET_CLASS( g_type_class_peek (gtk_widget_get_type ()) );
object_class->destroy = cvImageWidget_destroy;
widget_class->realize = cvImageWidget_realize;
widget_class->size_request = cvImageWidget_size_request;
widget_class->size_allocate = cvImageWidget_size_allocate;
widget_class->button_press_event = NULL;
widget_class->button_release_event = NULL;
widget_class->motion_notify_event = NULL;
}
static void
cvImageWidget_init (CvImageWidget *image_widget)
{
image_widget->original_image=0;
image_widget->scaled_image=0;
image_widget->flags=0;
}
GType cvImageWidget_get_type (void){
static GType image_type = 0;
if (!image_type)
{
image_type = g_type_register_static_simple( GTK_TYPE_WIDGET,
(gchar*) "CvImageWidget",
sizeof(CvImageWidgetClass),
(GClassInitFunc) cvImageWidget_class_init,
sizeof(CvImageWidget),
(GInstanceInitFunc) cvImageWidget_init,
(GTypeFlags)NULL);
}
return image_type;
}
/////////////////////////////////////////////////////////////////////////////
// End CvImageWidget
/////////////////////////////////////////////////////////////////////////////
struct CvWindow;
typedef struct CvTrackbar
{
int signature;
GtkWidget* widget;
char* name;
CvTrackbar* next;
CvWindow* parent;
int* data;
int pos;
int maxval;
CvTrackbarCallback notify;
CvTrackbarCallback2 notify2;
void* userdata;
}
CvTrackbar;
typedef struct CvWindow
{
int signature;
GtkWidget* widget;
GtkWidget* frame;
GtkWidget* paned;
char* name;
CvWindow* prev;
CvWindow* next;
int last_key;
int flags;
int status;//0 normal, 1 fullscreen (YV)
CvMouseCallback on_mouse;
void* on_mouse_param;
struct
{
int pos;
int rows;
CvTrackbar* first;
}
toolbar;
#ifdef HAVE_OPENGL
bool useGl;
CvOpenGlDrawCallback glDrawCallback;
void* glDrawData;
#endif
}
CvWindow;
static gboolean icvOnClose( GtkWidget* widget, GdkEvent* event, gpointer user_data );
static gboolean icvOnKeyPress( GtkWidget* widget, GdkEventKey* event, gpointer user_data );
static void icvOnTrackbar( GtkWidget* widget, gpointer user_data );
static gboolean icvOnMouse( GtkWidget *widget, GdkEvent *event, gpointer user_data );
#ifdef HAVE_GTHREAD
int thread_started=0;
static gpointer icvWindowThreadLoop();
GMutex* last_key_mutex;
GCond* cond_have_key;
GMutex* window_mutex;
GThread* window_thread;
GtkWidget* cvTopLevelWidget = 0;
#endif
static int last_key = -1;
static CvWindow* hg_windows = 0;
CV_IMPL int cvInitSystem( int argc, char** argv )
{
static int wasInitialized = 0;
// check initialization status
if( !wasInitialized )
{
hg_windows = 0;
gtk_disable_setlocale();
gtk_init( &argc, &argv );
#ifdef HAVE_OPENGL
gtk_gl_init(&argc, &argv);
#endif
wasInitialized = 1;
}
return 0;
}
CV_IMPL int cvStartWindowThread(){
#ifdef HAVE_GTHREAD
cvInitSystem(0,NULL);
if (!thread_started) {
if (!g_thread_supported ()) {
/* the GThread system wasn't inited, so init it */
g_thread_init(NULL);
}
// this mutex protects the window resources
window_mutex = g_mutex_new();
// protects the 'last key pressed' variable
last_key_mutex = g_mutex_new();
// conditional that indicates a key has been pressed
cond_have_key = g_cond_new();
// this is the window update thread
window_thread = g_thread_create((GThreadFunc) icvWindowThreadLoop,
NULL, TRUE, NULL);
}
thread_started = window_thread!=NULL;
return thread_started;
#else
return 0;
#endif
}
#ifdef HAVE_GTHREAD
gpointer icvWindowThreadLoop(){
while(1){
g_mutex_lock(window_mutex);
gtk_main_iteration_do(FALSE);
g_mutex_unlock(window_mutex);
// little sleep
g_usleep(500);
g_thread_yield();
}
return NULL;
}
#define CV_LOCK_MUTEX() \
if(thread_started && g_thread_self()!=window_thread){ g_mutex_lock( window_mutex ); } else { }
#define CV_UNLOCK_MUTEX() \
if(thread_started && g_thread_self()!=window_thread){ g_mutex_unlock( window_mutex); } else { }
#else
#define CV_LOCK_MUTEX()
#define CV_UNLOCK_MUTEX()
#endif
static CvWindow* icvFindWindowByName( const char* name )
{
CvWindow* window = hg_windows;
while( window != 0 && strcmp(name, window->name) != 0 )
window = window->next;
return window;
}
static CvWindow* icvWindowByWidget( GtkWidget* widget )
{
CvWindow* window = hg_windows;
while( window != 0 && window->widget != widget &&
window->frame != widget && window->paned != widget )
window = window->next;
return window;
}
double cvGetModeWindow_GTK(const char* name)//YV
{
double result = -1;
CV_FUNCNAME( "cvGetModeWindow_GTK" );
__BEGIN__;
CvWindow* window;
if (!name)
CV_ERROR( CV_StsNullPtr, "NULL name string" );
window = icvFindWindowByName( name );
if (!window)
CV_ERROR( CV_StsNullPtr, "NULL window" );
CV_LOCK_MUTEX();
result = window->status;
CV_UNLOCK_MUTEX();
__END__;
return result;
}
void cvSetModeWindow_GTK( const char* name, double prop_value)//Yannick Verdie
{
CV_FUNCNAME( "cvSetModeWindow_GTK" );
__BEGIN__;
CvWindow* window;
if(!name)
CV_ERROR( CV_StsNullPtr, "NULL name string" );
window = icvFindWindowByName( name );
if( !window )
CV_ERROR( CV_StsNullPtr, "NULL window" );
if(window->flags & CV_WINDOW_AUTOSIZE)//if the flag CV_WINDOW_AUTOSIZE is set
EXIT;
//so easy to do fullscreen here, Linux rocks !
if (window->status==CV_WINDOW_FULLSCREEN && prop_value==CV_WINDOW_NORMAL)
{
CV_LOCK_MUTEX();
gtk_window_unfullscreen(GTK_WINDOW(window->frame));
window->status=CV_WINDOW_NORMAL;
CV_UNLOCK_MUTEX();
EXIT;
}
if (window->status==CV_WINDOW_NORMAL && prop_value==CV_WINDOW_FULLSCREEN)
{
CV_LOCK_MUTEX();
gtk_window_fullscreen(GTK_WINDOW(window->frame));
window->status=CV_WINDOW_FULLSCREEN;
CV_UNLOCK_MUTEX();
EXIT;
}
__END__;
}
double cvGetPropWindowAutoSize_GTK(const char* name)
{
double result = -1;
CV_FUNCNAME( "cvGetPropWindowAutoSize_GTK" );
__BEGIN__;
CvWindow* window;
if (!name)
CV_ERROR( CV_StsNullPtr, "NULL name string" );
window = icvFindWindowByName( name );
if (!window)
EXIT; // keep silence here
result = window->flags & CV_WINDOW_AUTOSIZE;
__END__;
return result;
}
double cvGetRatioWindow_GTK(const char* name)
{
double result = -1;
CV_FUNCNAME( "cvGetRatioWindow_GTK" );
__BEGIN__;
CvWindow* window;
if (!name)
CV_ERROR( CV_StsNullPtr, "NULL name string" );
window = icvFindWindowByName( name );
if (!window)
EXIT; // keep silence here
result = static_cast<double>(window->widget->allocation.width) / window->widget->allocation.height;
__END__;
return result;
}
double cvGetOpenGlProp_GTK(const char* name)
{
double result = -1;
#ifdef HAVE_OPENGL
CV_FUNCNAME( "cvGetOpenGlProp_GTK" );
__BEGIN__;
CvWindow* window;
if (!name)
CV_ERROR( CV_StsNullPtr, "NULL name string" );
window = icvFindWindowByName( name );
if (!window)
EXIT; // keep silence here
result = window->useGl;
__END__;
#else
(void)name;
#endif
return result;
}
// OpenGL support
#ifdef HAVE_OPENGL
namespace
{
void createGlContext(CvWindow* window)
{
GdkGLConfig* glconfig;
CV_FUNCNAME( "createGlContext" );
__BEGIN__;
// Try double-buffered visual
glconfig = gdk_gl_config_new_by_mode((GdkGLConfigMode)(GDK_GL_MODE_RGB | GDK_GL_MODE_DEPTH | GDK_GL_MODE_DOUBLE));
if (!glconfig)
CV_ERROR( CV_OpenGlApiCallError, "Can't Create A GL Device Context" );
// Set OpenGL-capability to the widget
if (!gtk_widget_set_gl_capability(window->widget, glconfig, NULL, TRUE, GDK_GL_RGBA_TYPE))
CV_ERROR( CV_OpenGlApiCallError, "Can't Create A GL Device Context" );
window->useGl = true;
__END__;
}
void drawGl(CvWindow* window)
{
CV_FUNCNAME( "drawGl" );
__BEGIN__;
GdkGLContext* glcontext = gtk_widget_get_gl_context(window->widget);
GdkGLDrawable* gldrawable = gtk_widget_get_gl_drawable(window->widget);
if (!gdk_gl_drawable_gl_begin (gldrawable, glcontext))
CV_ERROR( CV_OpenGlApiCallError, "Can't Activate The GL Rendering Context" );
glViewport(0, 0, window->widget->allocation.width, window->widget->allocation.height);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
if (window->glDrawCallback)
window->glDrawCallback(window->glDrawData);
if (gdk_gl_drawable_is_double_buffered (gldrawable))
gdk_gl_drawable_swap_buffers(gldrawable);
else
glFlush();
gdk_gl_drawable_gl_end(gldrawable);
__END__;
}
}
#endif // HAVE_OPENGL
static gboolean cvImageWidget_expose(GtkWidget* widget, GdkEventExpose* event, gpointer data)
{
#ifdef HAVE_OPENGL
CvWindow* window = (CvWindow*)data;
if (window->useGl)
{
drawGl(window);
return TRUE;
}
#else
(void)data;
#endif
CvImageWidget *image_widget = NULL;
cairo_t *cr = NULL;
GdkPixbuf *pixbuf = NULL;
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (CV_IS_IMAGE_WIDGET (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
if (event->count > 0)
return FALSE;
cr = gdk_cairo_create(widget->window);
image_widget = CV_IMAGE_WIDGET (widget);
if( image_widget->scaled_image ){
// center image in available region
int x0 = (widget->allocation.width - image_widget->scaled_image->cols)/2;
int y0 = (widget->allocation.height - image_widget->scaled_image->rows)/2;
pixbuf = gdk_pixbuf_new_from_data(image_widget->scaled_image->data.ptr, GDK_COLORSPACE_RGB, false,
8, MIN(image_widget->scaled_image->cols, widget->allocation.width),
MIN(image_widget->scaled_image->rows, widget->allocation.height),
image_widget->scaled_image->step, NULL, NULL);
gdk_cairo_set_source_pixbuf(cr, pixbuf, x0, y0);
}
else if( image_widget->original_image ){
pixbuf = gdk_pixbuf_new_from_data(image_widget->original_image->data.ptr, GDK_COLORSPACE_RGB, false,
8, MIN(image_widget->original_image->cols, widget->allocation.width),
MIN(image_widget->original_image->rows, widget->allocation.height),
image_widget->original_image->step, NULL, NULL);
gdk_cairo_set_source_pixbuf(cr, pixbuf, 0, 0);
}
cairo_paint(cr);
cairo_destroy(cr);
return TRUE;
}
CV_IMPL int cvNamedWindow( const char* name, int flags )
{
int result = 0;
CV_FUNCNAME( "cvNamedWindow" );
__BEGIN__;
CvWindow* window;
int len;
cvInitSystem(1,(char**)&name);
if( !name )
CV_ERROR( CV_StsNullPtr, "NULL name string" );
// Check the name in the storage
if( icvFindWindowByName( name ) != 0 )
{
result = 1;
EXIT;
}
len = strlen(name);
CV_CALL( window = (CvWindow*)cvAlloc(sizeof(CvWindow) + len + 1));
memset( window, 0, sizeof(*window));
window->name = (char*)(window + 1);
memcpy( window->name, name, len + 1 );
window->flags = flags;
window->signature = CV_WINDOW_MAGIC_VAL;
window->last_key = 0;
window->on_mouse = 0;
window->on_mouse_param = 0;
memset( &window->toolbar, 0, sizeof(window->toolbar));
window->next = hg_windows;
window->prev = 0;
window->status = CV_WINDOW_NORMAL;//YV
CV_LOCK_MUTEX();
window->frame = gtk_window_new( GTK_WINDOW_TOPLEVEL );
window->paned = gtk_vbox_new( FALSE, 0 );
window->widget = cvImageWidgetNew( flags );
gtk_box_pack_end( GTK_BOX(window->paned), window->widget, TRUE, TRUE, 0 );
gtk_widget_show( window->widget );
gtk_container_add( GTK_CONTAINER(window->frame), window->paned );
gtk_widget_show( window->paned );
#ifndef HAVE_OPENGL
if (flags & CV_WINDOW_OPENGL)
CV_ERROR( CV_OpenGlNotSupported, "Library was built without OpenGL support" );
#else
if (flags & CV_WINDOW_OPENGL)
createGlContext(window);
window->glDrawCallback = 0;
window->glDrawData = 0;
#endif
//
// configure event handlers
// TODO -- move this to CvImageWidget ?
g_signal_connect( window->frame, "key-press-event",
G_CALLBACK(icvOnKeyPress), window );
g_signal_connect( window->widget, "button-press-event",
G_CALLBACK(icvOnMouse), window );
g_signal_connect( window->widget, "button-release-event",
G_CALLBACK(icvOnMouse), window );
g_signal_connect( window->widget, "motion-notify-event",
G_CALLBACK(icvOnMouse), window );
g_signal_connect( window->frame, "delete-event",
G_CALLBACK(icvOnClose), window );
g_signal_connect( window->widget, "expose-event",
G_CALLBACK(cvImageWidget_expose), window );
gtk_widget_add_events (window->widget, GDK_BUTTON_RELEASE_MASK | GDK_BUTTON_PRESS_MASK | GDK_POINTER_MOTION_MASK) ;
gtk_widget_show( window->frame );
gtk_window_set_title( GTK_WINDOW(window->frame), name );
if( hg_windows )
hg_windows->prev = window;
hg_windows = window;
gtk_window_set_resizable( GTK_WINDOW(window->frame), (flags & CV_WINDOW_AUTOSIZE) == 0 );
// allow window to be resized
if( (flags & CV_WINDOW_AUTOSIZE)==0 ){
GdkGeometry geometry;
geometry.min_width = 50;
geometry.min_height = 50;
gtk_window_set_geometry_hints( GTK_WINDOW( window->frame ), GTK_WIDGET( window->widget ),
&geometry, (GdkWindowHints) (GDK_HINT_MIN_SIZE));
}
CV_UNLOCK_MUTEX();
#ifdef HAVE_OPENGL
if (window->useGl)
cvSetOpenGlContext(name);
#endif
result = 1;
__END__;
return result;
}
#ifdef HAVE_OPENGL
CV_IMPL void cvSetOpenGlContext(const char* name)
{
CvWindow* window;
GdkGLContext* glcontext;
GdkGLDrawable* gldrawable;
CV_FUNCNAME( "cvSetOpenGlContext" );
__BEGIN__;
if(!name)
CV_ERROR( CV_StsNullPtr, "NULL name string" );
window = icvFindWindowByName( name );
if (!window)
CV_ERROR( CV_StsNullPtr, "NULL window" );
if (!window->useGl)
CV_ERROR( CV_OpenGlNotSupported, "Window doesn't support OpenGL" );
glcontext = gtk_widget_get_gl_context(window->widget);
gldrawable = gtk_widget_get_gl_drawable(window->widget);
if (!gdk_gl_drawable_make_current(gldrawable, glcontext))
CV_ERROR( CV_OpenGlApiCallError, "Can't Activate The GL Rendering Context" );
__END__;
}
CV_IMPL void cvUpdateWindow(const char* name)
{
CV_FUNCNAME( "cvUpdateWindow" );
__BEGIN__;
CvWindow* window;
if (!name)
CV_ERROR( CV_StsNullPtr, "NULL name string" );
window = icvFindWindowByName( name );
if (!window)
EXIT;
// window does not refresh without this
gtk_widget_queue_draw( GTK_WIDGET(window->widget) );
__END__;
}
CV_IMPL void cvSetOpenGlDrawCallback(const char* name, CvOpenGlDrawCallback callback, void* userdata)
{
CvWindow* window;
CV_FUNCNAME( "cvCreateOpenGLCallback" );
__BEGIN__;
if(!name)
CV_ERROR( CV_StsNullPtr, "NULL name string" );
window = icvFindWindowByName( name );
if( !window )
EXIT;
if (!window->useGl)
CV_ERROR( CV_OpenGlNotSupported, "Window was created without OpenGL context" );
window->glDrawCallback = callback;
window->glDrawData = userdata;
__END__;
}
#endif // HAVE_OPENGL
static void icvDeleteWindow( CvWindow* window )
{
CvTrackbar* trackbar;
if( window->prev )
window->prev->next = window->next;
else
hg_windows = window->next;
if( window->next )
window->next->prev = window->prev;
window->prev = window->next = 0;
gtk_widget_destroy( window->frame );
for( trackbar = window->toolbar.first; trackbar != 0; )
{
CvTrackbar* next = trackbar->next;
cvFree( &trackbar );
trackbar = next;
}
cvFree( &window );
#ifdef HAVE_GTHREAD
// if last window, send key press signal
// to jump out of any waiting cvWaitKey's
if(hg_windows==0 && thread_started){
g_cond_broadcast(cond_have_key);
}
#endif
}
CV_IMPL void cvDestroyWindow( const char* name )
{
CV_FUNCNAME( "cvDestroyWindow" );
__BEGIN__;
CvWindow* window;
if(!name)
CV_ERROR( CV_StsNullPtr, "NULL name string" );
window = icvFindWindowByName( name );
if( !window )
EXIT;
// note that it is possible for the update thread to run this function
// if there is a call to cvShowImage in a mouse callback
// (this would produce a deadlock on window_mutex)
CV_LOCK_MUTEX();
icvDeleteWindow( window );
CV_UNLOCK_MUTEX();
__END__;
}
CV_IMPL void
cvDestroyAllWindows( void )
{
CV_LOCK_MUTEX();
while( hg_windows )
{
CvWindow* window = hg_windows;
icvDeleteWindow( window );
}
CV_UNLOCK_MUTEX();
}
// CvSize icvCalcOptimalWindowSize( CvWindow * window, CvSize new_image_size){
// CvSize window_size;
// GtkWidget * toplevel = gtk_widget_get_toplevel( window->frame );
// gdk_drawable_get_size( GDK_DRAWABLE(toplevel->window),
// &window_size.width, &window_size.height );
// window_size.width = window_size.width + new_image_size.width - window->widget->allocation.width;
// window_size.height = window_size.height + new_image_size.height - window->widget->allocation.height;
// return window_size;
// }
CV_IMPL void
cvShowImage( const char* name, const CvArr* arr )
{
CV_FUNCNAME( "cvShowImage" );
__BEGIN__;
CvWindow* window;
if( !name )
CV_ERROR( CV_StsNullPtr, "NULL name" );
CV_LOCK_MUTEX();
window = icvFindWindowByName(name);
if(!window)
{
cvNamedWindow(name, 1);
window = icvFindWindowByName(name);
}
if( window && arr )
{
#ifdef HAVE_OPENGL
if (window->useGl)
{
cv::imshow(name, cv::cvarrToMat(arr));
return;
}
#endif
CvImageWidget * image_widget = CV_IMAGE_WIDGET( window->widget );
cvImageWidgetSetImage( image_widget, arr );
}
CV_UNLOCK_MUTEX();
__END__;
}
CV_IMPL void cvResizeWindow(const char* name, int width, int height )
{
CV_FUNCNAME( "cvResizeWindow" );
__BEGIN__;
CvWindow* window;
CvImageWidget * image_widget;
if( !name )
CV_ERROR( CV_StsNullPtr, "NULL name" );
window = icvFindWindowByName(name);
if(!window)
EXIT;
image_widget = CV_IMAGE_WIDGET( window->widget );
//if(image_widget->flags & CV_WINDOW_AUTOSIZE)
//EXIT;
CV_LOCK_MUTEX();
gtk_window_set_resizable( GTK_WINDOW(window->frame), 1 );
gtk_window_resize( GTK_WINDOW(window->frame), width, height );
// disable initial resize since presumably user wants to keep
// this window size
image_widget->flags &= ~CV_WINDOW_NO_IMAGE;
CV_UNLOCK_MUTEX();
__END__;
}
CV_IMPL void cvMoveWindow( const char* name, int x, int y )
{
CV_FUNCNAME( "cvMoveWindow" );
__BEGIN__;
CvWindow* window;
if( !name )
CV_ERROR( CV_StsNullPtr, "NULL name" );
window = icvFindWindowByName(name);
if(!window)
EXIT;
CV_LOCK_MUTEX();
gtk_window_move( GTK_WINDOW(window->frame), x, y );
CV_UNLOCK_MUTEX();
__END__;
}
static CvTrackbar*
icvFindTrackbarByName( const CvWindow* window, const char* name )
{
CvTrackbar* trackbar = window->toolbar.first;
for( ; trackbar != 0 && strcmp( trackbar->name, name ) != 0; trackbar = trackbar->next )
;
return trackbar;
}
static int
icvCreateTrackbar( const char* trackbar_name, const char* window_name,
int* val, int count, CvTrackbarCallback on_notify,
CvTrackbarCallback2 on_notify2, void* userdata )
{
int result = 0;
CV_FUNCNAME( "icvCreateTrackbar" );
__BEGIN__;
/*char slider_name[32];*/
CvWindow* window = 0;
CvTrackbar* trackbar = 0;
if( !window_name || !trackbar_name )
CV_ERROR( CV_StsNullPtr, "NULL window or trackbar name" );
if( count <= 0 )
CV_ERROR( CV_StsOutOfRange, "Bad trackbar maximal value" );
window = icvFindWindowByName(window_name);
if( !window )
EXIT;
trackbar = icvFindTrackbarByName(window,trackbar_name);
CV_LOCK_MUTEX();
if( !trackbar )
{
int len = strlen(trackbar_name);
trackbar = (CvTrackbar*)cvAlloc(sizeof(CvTrackbar) + len + 1);
memset( trackbar, 0, sizeof(*trackbar));
trackbar->signature = CV_TRACKBAR_MAGIC_VAL;
trackbar->name = (char*)(trackbar+1);
memcpy( trackbar->name, trackbar_name, len + 1 );
trackbar->parent = window;
trackbar->next = window->toolbar.first;
window->toolbar.first = trackbar;
GtkWidget* hscale_box = gtk_hbox_new( FALSE, 10 );
GtkWidget* hscale_label = gtk_label_new( trackbar_name );
GtkWidget* hscale = gtk_hscale_new_with_range( 0, count, 1 );
gtk_scale_set_digits( GTK_SCALE(hscale), 0 );
//gtk_scale_set_value_pos( hscale, GTK_POS_TOP );
gtk_scale_set_draw_value( GTK_SCALE(hscale), TRUE );
trackbar->widget = hscale;
gtk_box_pack_start( GTK_BOX(hscale_box), hscale_label, FALSE, FALSE, 5 );
gtk_widget_show( hscale_label );
gtk_box_pack_start( GTK_BOX(hscale_box), hscale, TRUE, TRUE, 5 );
gtk_widget_show( hscale );
gtk_box_pack_start( GTK_BOX(window->paned), hscale_box, FALSE, FALSE, 5 );
gtk_widget_show( hscale_box );
}
if( val )
{
int value = *val;
if( value < 0 )
value = 0;
if( value > count )
value = count;
gtk_range_set_value( GTK_RANGE(trackbar->widget), value );
trackbar->pos = value;
trackbar->data = val;
}
trackbar->maxval = count;
trackbar->notify = on_notify;
trackbar->notify2 = on_notify2;
trackbar->userdata = userdata;
g_signal_connect( trackbar->widget, "value-changed",
G_CALLBACK(icvOnTrackbar), trackbar );
// queue a widget resize to trigger a window resize to
// compensate for the addition of trackbars
gtk_widget_queue_resize( GTK_WIDGET(window->widget) );
CV_UNLOCK_MUTEX();
result = 1;
__END__;
return result;
}
CV_IMPL int
cvCreateTrackbar( const char* trackbar_name, const char* window_name,
int* val, int count, CvTrackbarCallback on_notify )
{
return icvCreateTrackbar(trackbar_name, window_name, val, count,
on_notify, 0, 0);
}
CV_IMPL int
cvCreateTrackbar2( const char* trackbar_name, const char* window_name,
int* val, int count, CvTrackbarCallback2 on_notify2,
void* userdata )
{
return icvCreateTrackbar(trackbar_name, window_name, val, count,
0, on_notify2, userdata);
}
CV_IMPL void
cvSetMouseCallback( const char* window_name, CvMouseCallback on_mouse, void* param )
{
CV_FUNCNAME( "cvSetMouseCallback" );
__BEGIN__;
CvWindow* window = 0;
if( !window_name )
CV_ERROR( CV_StsNullPtr, "NULL window name" );
window = icvFindWindowByName(window_name);
if( !window )
EXIT;
window->on_mouse = on_mouse;
window->on_mouse_param = param;
__END__;
}
CV_IMPL int cvGetTrackbarPos( const char* trackbar_name, const char* window_name )
{
int pos = -1;
CV_FUNCNAME( "cvGetTrackbarPos" );
__BEGIN__;
CvWindow* window;
CvTrackbar* trackbar = 0;
if( trackbar_name == 0 || window_name == 0 )
CV_ERROR( CV_StsNullPtr, "NULL trackbar or window name" );
window = icvFindWindowByName( window_name );
if( window )
trackbar = icvFindTrackbarByName( window, trackbar_name );
if( trackbar )
pos = trackbar->pos;
__END__;
return pos;
}
CV_IMPL void cvSetTrackbarPos( const char* trackbar_name, const char* window_name, int pos )
{
CV_FUNCNAME( "cvSetTrackbarPos" );
__BEGIN__;
CvWindow* window;
CvTrackbar* trackbar = 0;
if( trackbar_name == 0 || window_name == 0 )
CV_ERROR( CV_StsNullPtr, "NULL trackbar or window name" );
window = icvFindWindowByName( window_name );
if( window )
trackbar = icvFindTrackbarByName( window, trackbar_name );
if( trackbar )
{
if( pos < 0 )
pos = 0;
if( pos > trackbar->maxval )
pos = trackbar->maxval;
}
CV_LOCK_MUTEX();
gtk_range_set_value( GTK_RANGE(trackbar->widget), pos );
CV_UNLOCK_MUTEX();
__END__;
}
CV_IMPL void* cvGetWindowHandle( const char* window_name )
{
void* widget = 0;
CV_FUNCNAME( "cvGetWindowHandle" );
__BEGIN__;
CvWindow* window;
if( window_name == 0 )
CV_ERROR( CV_StsNullPtr, "NULL window name" );
window = icvFindWindowByName( window_name );
if( window )
widget = (void*)window->widget;
__END__;
return widget;
}
CV_IMPL const char* cvGetWindowName( void* window_handle )
{
const char* window_name = "";
CV_FUNCNAME( "cvGetWindowName" );
__BEGIN__;
CvWindow* window;
if( window_handle == 0 )
CV_ERROR( CV_StsNullPtr, "NULL window" );
window = icvWindowByWidget( (GtkWidget*)window_handle );
if( window )
window_name = window->name;
__END__;
return window_name;
}
static gboolean icvOnKeyPress( GtkWidget * /*widget*/,
GdkEventKey* event, gpointer /*user_data*/ )
{
int code = 0;
switch( event->keyval )
{
case GDK_Escape:
code = 27;
break;
case GDK_Return:
case GDK_Linefeed:
code = '\n';
break;
case GDK_Tab:
code = '\t';
break;
default:
code = event->keyval;
}
code |= event->state << 16;
#ifdef HAVE_GTHREAD
if(thread_started) g_mutex_lock(last_key_mutex);
#endif
last_key = code;
#ifdef HAVE_GTHREAD
if(thread_started){
// signal any waiting threads
g_cond_broadcast(cond_have_key);
g_mutex_unlock(last_key_mutex);
}
#endif
return FALSE;
}
static void icvOnTrackbar( GtkWidget* widget, gpointer user_data )
{
int pos = cvRound( gtk_range_get_value(GTK_RANGE(widget)));
CvTrackbar* trackbar = (CvTrackbar*)user_data;
if( trackbar && trackbar->signature == CV_TRACKBAR_MAGIC_VAL &&
trackbar->widget == widget )
{
trackbar->pos = pos;
if( trackbar->data )
*trackbar->data = pos;
if( trackbar->notify2 )
trackbar->notify2(pos, trackbar->userdata);
else if( trackbar->notify )
trackbar->notify(pos);
}
}
static gboolean icvOnClose( GtkWidget* widget, GdkEvent* /*event*/, gpointer user_data )
{
CvWindow* window = (CvWindow*)user_data;
if( window->signature == CV_WINDOW_MAGIC_VAL &&
window->frame == widget )
{
icvDeleteWindow(window);
}
return TRUE;
}
static gboolean icvOnMouse( GtkWidget *widget, GdkEvent *event, gpointer user_data )
{
// TODO move this logic to CvImageWidget
CvWindow* window = (CvWindow*)user_data;
CvPoint2D32f pt32f(-1., -1.);
CvPoint pt(-1,-1);
int cv_event = -1, state = 0;
CvImageWidget * image_widget = CV_IMAGE_WIDGET( widget );
if( window->signature != CV_WINDOW_MAGIC_VAL ||
window->widget != widget || !window->widget ||
!window->on_mouse /*|| !image_widget->original_image*/)
return FALSE;
if( event->type == GDK_MOTION_NOTIFY )
{
GdkEventMotion* event_motion = (GdkEventMotion*)event;
cv_event = CV_EVENT_MOUSEMOVE;
pt32f.x = cvRound(event_motion->x);
pt32f.y = cvRound(event_motion->y);
state = event_motion->state;
}
else if( event->type == GDK_BUTTON_PRESS ||
event->type == GDK_BUTTON_RELEASE ||
event->type == GDK_2BUTTON_PRESS )
{
GdkEventButton* event_button = (GdkEventButton*)event;
pt32f.x = cvRound(event_button->x);
pt32f.y = cvRound(event_button->y);
if( event_button->type == GDK_BUTTON_PRESS )
{
cv_event = event_button->button == 1 ? CV_EVENT_LBUTTONDOWN :
event_button->button == 2 ? CV_EVENT_MBUTTONDOWN :
event_button->button == 3 ? CV_EVENT_RBUTTONDOWN : 0;
}
else if( event_button->type == GDK_BUTTON_RELEASE )
{
cv_event = event_button->button == 1 ? CV_EVENT_LBUTTONUP :
event_button->button == 2 ? CV_EVENT_MBUTTONUP :
event_button->button == 3 ? CV_EVENT_RBUTTONUP : 0;
}
else if( event_button->type == GDK_2BUTTON_PRESS )
{
cv_event = event_button->button == 1 ? CV_EVENT_LBUTTONDBLCLK :
event_button->button == 2 ? CV_EVENT_MBUTTONDBLCLK :
event_button->button == 3 ? CV_EVENT_RBUTTONDBLCLK : 0;
}
state = event_button->state;
}
if( cv_event >= 0 ){
// scale point if image is scaled
if( (image_widget->flags & CV_WINDOW_AUTOSIZE)==0 &&
image_widget->original_image &&
image_widget->scaled_image ){
// image origin is not necessarily at (0,0)
int x0 = (widget->allocation.width - image_widget->scaled_image->cols)/2;
int y0 = (widget->allocation.height - image_widget->scaled_image->rows)/2;
pt.x = cvRound( ((pt32f.x-x0)*image_widget->original_image->cols)/
image_widget->scaled_image->cols );
pt.y = cvRound( ((pt32f.y-y0)*image_widget->original_image->rows)/
image_widget->scaled_image->rows );
}
else{
pt = cvPointFrom32f( pt32f );
}
// if((unsigned)pt.x < (unsigned)(image_widget->original_image->width) &&
// (unsigned)pt.y < (unsigned)(image_widget->original_image->height) )
{
int flags = (state & GDK_SHIFT_MASK ? CV_EVENT_FLAG_SHIFTKEY : 0) |
(state & GDK_CONTROL_MASK ? CV_EVENT_FLAG_CTRLKEY : 0) |
(state & (GDK_MOD1_MASK|GDK_MOD2_MASK) ? CV_EVENT_FLAG_ALTKEY : 0) |
(state & GDK_BUTTON1_MASK ? CV_EVENT_FLAG_LBUTTON : 0) |
(state & GDK_BUTTON2_MASK ? CV_EVENT_FLAG_MBUTTON : 0) |
(state & GDK_BUTTON3_MASK ? CV_EVENT_FLAG_RBUTTON : 0);
window->on_mouse( cv_event, pt.x, pt.y, flags, window->on_mouse_param );
}
}
return FALSE;
}
static gboolean icvAlarm( gpointer user_data )
{
*(int*)user_data = 1;
return FALSE;
}
CV_IMPL int cvWaitKey( int delay )
{
#ifdef HAVE_GTHREAD
if(thread_started && g_thread_self()!=window_thread){
gboolean expired;
int my_last_key;
// wait for signal or timeout if delay > 0
if(delay>0){
GTimeVal timer;
g_get_current_time(&timer);
g_time_val_add(&timer, delay*1000);
expired = !g_cond_timed_wait(cond_have_key, last_key_mutex, &timer);
}
else{
g_cond_wait(cond_have_key, last_key_mutex);
expired=false;
}
my_last_key = last_key;
g_mutex_unlock(last_key_mutex);
if(expired || hg_windows==0){
return -1;
}
return my_last_key;
}
else{
#endif
int expired = 0;
guint timer = 0;
if( delay > 0 )
timer = g_timeout_add( delay, icvAlarm, &expired );
last_key = -1;
while( gtk_main_iteration_do(TRUE) && last_key < 0 && !expired && hg_windows != 0 )
;
if( delay > 0 && !expired )
g_source_remove(timer);
#ifdef HAVE_GTHREAD
}
#endif
return last_key;
}
#endif // HAVE_GTK
#endif // WIN32
/* End of file. */