C++ Fl_Image类代码示例

void bg_image_input(Fl_Input *w, void *d)
{
    changed=true;

    Fl_String val(w->value());
    filename = fl_file_expand(val);

    if(mini_wpaper) { delete mini_wpaper; mini_wpaper=0; }
    if(mini_image)  { delete mini_image; mini_image=0; }

    Fl_Image *im = Fl_Image::read(filename);
    if(im) {
        im->system_convert();
        float scalew = (float)mini_image_box->w()/(float)desktop->w();
        float scaleh = (float)mini_image_box->h()/(float)desktop->h();
        mini_image = im->scale(int(im->width()*scalew), int(im->height()*scaleh));
        delete im;
    }

    if(mini_image) {
        mini_wpaper = make_image(color, mini_image,
                                 mini_image_box->w(), mini_image_box->h(),
                                 mode, opacity);
        mini_image_box->image(mini_wpaper);
    } else {
        mini_image_box->image(0);
    }

    image_input->value(filename);
    image_input->redraw();
    mini_image_box->redraw();
}

void Icon::update_icon()
{
    if(icon_im) delete icon_im;

    Fl_String path(PREFIX"/share/ede/icons/48x48/");
    path += icon_file;

    if(!fl_file_exists(path)) path = icon_file;

    if(fl_file_exists(path))
    {
        icon_im = Fl_Image::read(path, 0);
    } else {
        icon_im = 0;
    }

    if(!icon_im) {
        icon_im = Fl_Image::read(PREFIX"/share/ede/icons/48x48/folder.png", 0);
    }

    if(icon_im) {
        if(icon_im->width()!=48 || icon_im->height()!=48) {
            Fl_Image *old = icon_im;
            icon_im = old->scale(48,48);
            delete old;
        }
        icon_im->mask_type(MASK_ALPHA);
        icon_im->threshold(128);
    }
}

void Flcc_ValueBox::generate()
{
    int X = 0, Y = 0, W = w(), H = h();
    box()->inset(X,Y,W,H);

    Fl_Image *im = new Fl_Image(W, H, 32);

    uint32 *dst = (uint32*)im->data();
    uint32 rgb;
    int skip = (im->pitch() - W * im->bytespp()) >> 2;

    for(int y = 0; y < H; y++) {

        float Yf = 255*(1.0-float(y)/H);
        fl_rgb888_from_rgb(rgb, uchar(tr*Yf+.5f), uchar(tg*Yf+.5f), uchar(tb*Yf+.5f));

        for(int x = 0; x < W; x++) {
            *dst++ = rgb;
        }

        dst += skip;
    }
    if(bg) delete bg;
    bg = im;
}

void DerivedShared_Image::reload ()
{
    int i;
    FILE * fp;
    uchar header[64];
    Fl_Image * img;

    if (!name_)
        return;

    if ((fp = fl_fopen (name_, "rb")) != NULL)
    {
        if (fread (header, 1, sizeof (header), fp) == 0)
        { /* ignore */
        }
        fclose (fp);
    }
    else
    {
        return;
    }

    if (memcmp (header, "#define", 7) == 0) // XBM file
        img = new Fl_XBM_Image (name_);
    else if (memcmp (header, "/* XPM */", 9) == 0) // XPM file
        img = new Fl_XPM_Image (name_);
    else
    {
        for (i = 0, img = 0; i < num_handlers_; i++)
        {
            // The only difference is the cast
            img = (static_cast<Fl_Image *> (
                (fl_handlers_[i]) (name_, header, sizeof (header))));

            if (img)
                break;
        }
    }

    if (img)
    {
        if (alloc_image_)
            delete image_;

        alloc_image_ = 1;

        if ((img->w () != w () && w ()) || (img->h () != h () && h ()))
        {
            Fl_Image * temp = img->copy (w (), h ());
            delete img;
            image_ = temp;
        }
        else
        {
            image_ = img;
        }

        update ();
    }
};

void desktop_properties(Fl_Widget *, void *arg)
{
    if(!shown) {
        make_desktop_properties();
        shown = true;
    }

    mode = desktop->bg_mode;
    color = desktop->bg_color;
    opacity = desktop->bg_opacity;
    use = desktop->bg_use;
    filename = desktop->bg_filename;

    if(bg_prop_window->visible()) {
        bg_prop_window->show();
        return;
    }

    if(mini_image) { delete mini_image; mini_image=0;  }
    if(mini_wpaper){ delete mini_wpaper; mini_wpaper=0;}

    color_button->selection_color(color);
    mini_image_box->color(color);
    opacity_slider->value(opacity);
    mode_choice->value(mode);
    use_button->value(use);
    image_input->value(filename);

    if(!desktop->bg_filename.empty())
    {
        Fl_Image *im = Fl_Image::read(desktop->bg_filename);
        if(im) {
	    im->system_convert();
            float scalew = (float)mini_image_box->w()/(float)desktop->w();
            float scaleh = (float)mini_image_box->h()/(float)desktop->h();
            mini_image = im->scale(int(im->width()*scalew), int(im->height()*scaleh));
            delete im;
        }
    }

    if(mini_image) {
        mini_wpaper = make_image(color, mini_image,
                                 mini_image_box->w(), mini_image_box->h(),
                                 mode, opacity);
        mini_image_box->image(mini_wpaper);
    } else
        mini_image_box->image(0);

    if(use)
        bg_image_group->activate();
    else {
        bg_image_group->deactivate();
        mini_image_box->image(0);
    }

    bg_prop_window->show();
}

void
Panner::draw_the_box ( int tx, int ty, int tw, int th )
{
    draw_box();

    Fl_Image *i = 0;

    if ( _bg_image && ( _bg_image->h() != th || projection() != _bg_image_projection ) )
    {
        if ( _bg_image_scaled )
            delete _bg_image;
        else
            ((Fl_Shared_Image*)_bg_image)->release();

        _bg_image = 0;
    }

    if ( ! _bg_image )
    {
        if ( projection() == POLAR )
        {
            if ( th <= 92 )
                i = Fl_Shared_Image::get( PIXMAP_PATH "/non-mixer/panner-sphere-92x92.png" );
            else if ( th <= 502 )
                i = Fl_Shared_Image::get( PIXMAP_PATH "/non-mixer/panner-sphere-502x502.png" );
            else if ( th <= 802 )
                i = Fl_Shared_Image::get( PIXMAP_PATH "/non-mixer/panner-sphere-802x802.png" );
        }
        else
        {
            if ( th <= 92 )
                i = Fl_Shared_Image::get( PIXMAP_PATH "/non-mixer/panner-plane-92x92.png" );
            else if ( th <= 502 )
                i = Fl_Shared_Image::get( PIXMAP_PATH "/non-mixer/panner-plane-502x502.png" );
            else if ( th <= 802 )
                i = Fl_Shared_Image::get( PIXMAP_PATH "/non-mixer/panner-plane-802x802.png" );
        }

        if ( i && i->h() != th )
        {
            Fl_Image *scaled = i->copy( th, th );

            _bg_image = scaled;
            _bg_image_scaled = true;
        }
        else
        {
            _bg_image = i;
            _bg_image_scaled = false;
        }
    }
    
    _bg_image_projection = projection();

    if ( _bg_image )
        _bg_image->draw( tx, ty );
}

// Tests Open SLImage
TEST(ImageControllerTest, loadSLImageWithImageController) {
    ImageController imageController;
    imageController.open(filename);
    Fl_Image * image = imageController.getCurrentImage();
    ASSERT_NE((void *)NULL, image ) << "File did not open " << filename;
    EXPECT_EQ(30, image->w());
    EXPECT_EQ(30, image->h());
    EXPECT_EQ(3, image->d());
    EXPECT_EQ(92, image->ld()); //4 byte aligned under OpenCV not under FLTK
}

Fl_Image *Fl_Image_Filter::apply_to_new(Fl_Image *image, Fl_Rect *rect, Fl_Image_Filter *filter, float val1, float val2, float val3)
{
    Fl_Rect r(0,0,image->width(),image->height());
    if(!rect) { rect = &r; }
    Fl_Image *ret = new Fl_Image(*image);

    uint8 *data = ret->data();
    if(!filter->execute(&data, *rect, ret->pitch(), ret->format(), val1, val2, val3)) {
        delete ret;
        return 0;
    }
    return ret;
}

    void draw() {
        if(!(damage()&FL_DAMAGE_ALL)) return;

        int X=0,Y=0,W=w(),H=h();
        box()->inset(X,Y,W,H);

        if(image()) {
            draw_frame();
            fl_push_clip(X,Y,W,H);

            Fl_Image *im = image();

            W=im->width();
            H=im->height();
            int pbw = w() - 10;
            int pbh = h() - 10;
            if(W > pbw || H > pbh) {
                W = pbw;
                H = W * im->height() / im->width();
                if(H > pbh) {
                    H = pbh;
                    W = H * im->width() / im->height();
                }
            }
            X=(w()/2)-W/2;
            Y=(h()/2)-H/2;
            if(X<5) X=5;
            if(Y<5) Y=5;

            im->mask_type(MASK_NONE);
            im->draw(X,Y,W,H,FL_ALIGN_SCALE);

            fl_clip_out(X,Y,W,H);

            X=0,Y=0,W=w(),H=h();
            box()->inset(X,Y,W,H);

            fl_color(color());
            fl_rectf(X,Y,W,H);

            fl_pop_clip();

        } else {

            draw_box();

            if(w()<=120) label_size(8);
            if(w()>120) label_size(10);
            if(w()>180) label_size(12);
            if(w()>250) label_size(14);

            if(label()[0]=='?'&&label()[1]=='\0') label_size(100);

            draw_label(X, Y, W, H, align());
        }
    }

FltkImage * FltkImage::load(char const * filename) const {
	if (SLStringUtil::empty(filename))
		return 0;
	Fl_Shared_Image *sharedImage = Fl_Shared_Image::get(filename);
	Fl_Image * image = sharedImage->copy();
	sharedImage->release();
	if ( image->h() == 0 ) {
		delete image;
		return 0;
	}
	FltkImage * result = new FltkImage(image);
	result->setFilename(filename);
	return result;
}

Fl_Image *make_bg(int w, int h)
{
#ifdef GENERATE_16BIT
    Fl_Image *ret = new Fl_Image(w, h, 16, 0, true, 0x0000F000, 0x00000F00, 0x000000F0, 0x0000000F);
#else
    Fl_Image *ret = new Fl_Image(w, h, 32, 0, true, 0xFF000000, 0x00FF0000, 0x0000FF00, 0x000000FF);
#endif

    printf("BG Format:\n Rmask: 0x%08x\n Gmask: 0x%08x\n Bmask: 0x%08x\n", ret->format()->Rmask, ret->format()->Gmask, ret->format()->Bmask);

    // pitch = WORD alignment bits per line
    int pitch=Fl_Renderer::calc_pitch(ret->format()->bytespp, w);
    int skip = pitch - w * ret->format()->bytespp;

    uint8 *p = ret->data();
    uint8 r,g,b;

    for (int y = 0; y < h; y++) {
        double Y = double(y)/(h-1);
        for (int x = 0; x < w; x++) {
            double X = double(x)/(w-1);
            r = uchar(255*((1-X)*(1-Y))); // red in upper-left
            g = uchar(255*((1-X)*Y));	// green in lower-left
            b = uchar(255*(X*Y));	// blue in lower-right
            fl_assemble_rgb(p,
                            ret->format()->bytespp, ret->format(),
                            r, g, b);
            p+=ret->format()->bytespp;
        }
        p+=skip;
    }
    return ret;
}

Fl_Image *Fl_Image::scale(int W, int H)
{
    Fl_Image *ret = new Fl_Image(W, H, bitspp());
    ret->format()->copy(format());

    Fl_Rect olds(0,0,width(),height()); Fl_Rect news(0,0,W,H);
    bool success = Fl_Renderer::stretch(m_data, bytespp(), pitch(), &olds,
                                        ret->data(), bytespp(), ret->pitch(), &news);
    if(!success) {
        delete ret;
        ret = 0;
    }
    return ret;
}

MovableIcon::MovableIcon(Icon *i)
: Fl_Window(desktop->x()+i->x(), desktop->y()+i->y(), i->w(), i->h())
{
    icon = i;
    set_override();
    create();

    Fl_Image *im = i->icon_im;
    if(im)
    {
        Pixmap mask = im->create_mask(im->width(), im->height());
        XShapeCombineMask(fl_display, fl_xid(this), ShapeBounding, 0, 0, mask, ShapeSet);

        align(FL_ALIGN_INSIDE);
        image(im);
    }
}

MovableIcon::MovableIcon(Icon* i) : Fl_Window(i->x(), i->y(), i->w(), i->h()), icon(i)
{
	assert(icon != NULL);
	set_override();
	create();

	Fl_Image* img = icon->icon_image();
	if(img)
	{
#ifdef SHAPE
		Pixmap mask = img->create_mask(img->width(), img->height());
		XShapeCombineMask(fl_display, fl_xid(this), ShapeBounding, 0, 0, mask, ShapeSet);
#endif
		align(FL_ALIGN_INSIDE);
		image(img);
	}
}

void Icon::draw()
{
    Fl_Flags f=0;
    Fl_Image *im = icon_im;
    if(focused()) {
        f=FL_SELECTED;
    }

    if(im)
        im->draw(0, 0, w(), h(),f);
    else {
        fl_color(FL_RED);
        fl_rect(0,0,w(),h());
        fl_color(FL_BLACK);
        fl_rectf(1,1,w()-2,h()-2);
        fl_color(FL_WHITE);
        fl_font(label_font()->bold(), 10);
        fl_draw("NO ICON FOUND!", 1, 1, w()-2, h()-2, FL_ALIGN_TOP|FL_ALIGN_LEFT|FL_ALIGN_WRAP);
    }

    int X = w()-(w()/2)-(lwidth/2);
    int Y = h()+2;

    if(!label_trans) {
        fl_color(label_background);
        fl_rectf(X,Y,lwidth,lheight);
    }

    if(focused()) {
        focus_box()->draw(X, Y, lwidth, lheight, color(), 0);
    }

    fl_font(label_font(), label_size());

    // A little shadow, from Dejan's request :)
    // SUCKS!
    /*fl_color(fl_darker(label_color()));
    fl_draw(label(), X-1, Y+1, lwidth, lheight, flags());
    fl_draw(label(), X, Y+1, lwidth, lheight, flags());
    */

    fl_color(label_color());
    fl_draw(label(), X, Y, lwidth, lheight, flags());
}