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Added Fl_Shared_Image::scale(width, height) to support scaled image drawing (STR #3185).

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Useful for printing, PostScript or PDF output, or retina displays.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@10615 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Manolo Gouy
2015-03-10 21:06:22 +00:00
parent cc2436954d
commit dbde470f8d
9 changed files with 302 additions and 40 deletions
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test/pixmap_browser.cxx
+40 -16
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@@ -3,7 +3,7 @@
//
// A shared image test program for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2010 by Bill Spitzak and others.
// Copyright 1998-2015 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
@@ -21,6 +21,7 @@
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Button.H>
#include <FL/Fl_Shared_Image.H>
#include <FL/Fl_Printer.H>
#include <string.h>
#include <errno.h>
#include <FL/Fl_File_Chooser.H>
@@ -35,7 +36,7 @@ static char name[1024];
void load_file(const char *n) {
if (img) {
img->release();
((Fl_Shared_Image*)b->image())->release();
img = 0L;
}
if (fl_filename_isdir(n)) {
@@ -46,8 +47,9 @@ void load_file(const char *n) {
b->redraw();
return;
}
img = Fl_Shared_Image::get(n);
if (!img) {
Fl_Shared_Image *img2 = Fl_Shared_Image::get(n);
if (!img2) {
b->label("@filenew"); // show an empty document
b->labelsize(64);
b->labelcolor(FL_LIGHT2);
@@ -55,18 +57,23 @@ void load_file(const char *n) {
b->redraw();
return;
}
if (img->w() > b->w() || img->h() > b->h()) {
Fl_Image *temp;
if (img->w() > img->h()) temp = img->copy(b->w(), b->h() * img->h() / img->w());
else temp = img->copy(b->w() * img->w() / img->h(), b->h());
img->release();
img = (Fl_Shared_Image *)temp;
}
b->label(name);
img = img2;
b->labelsize(14);
b->labelcolor(FL_FOREGROUND_COLOR);
#if FLTK_ABI_VERSION >= 10304
b->image(img);
img->scale(b->w(), b->h());
#else
if (img->w() <= b->w() && img->h() <= b->h()) b->image(img);
else {
float fw = img->w() / float(b->w());
float fh = img->h() / float(b->h());
float f = fw > fh ? fw : fh;
b->image(img->copy(img->w()/f, img->h()/f));
img->release();
}
#endif
b->label(NULL);
b->redraw();
}
@@ -83,6 +90,20 @@ void button_cb(Fl_Widget *,void *) {
puts(fname ? fname : "(null)"); fflush(stdout);
fl_file_chooser_callback(0);
}
void print_cb(Fl_Widget *widget, void *) {
Fl_Printer printer;
int width, height;
if (printer.start_job(1)) return;
printer.start_page();
printer.printable_rect(&width, &height);
float fw = widget->window()->decorated_w() / float(width);
float fh = widget->window()->decorated_h() / float(height);
if (fh > fw) fw = fh;
printer.scale(1/fw);
printer.print_window(widget->window());
printer.end_page();
printer.end_job();
}
int dvisual = 0;
int arg(int, char **argv, int &i) {
@@ -97,15 +118,18 @@ int main(int argc, char **argv) {
Fl::args(argc,argv,i,arg);
Fl_Double_Window window(400,435); ::w = &window;
Fl_Double_Window window(400,450); ::w = &window;
Fl_Box b(10,45,380,380); ::b = &b;
b.box(FL_THIN_DOWN_BOX);
b.align(FL_ALIGN_INSIDE|FL_ALIGN_CENTER);
b.align(FL_ALIGN_INSIDE|FL_ALIGN_CENTER|FL_ALIGN_CLIP);
Fl_Button button(150,5,100,30,"load");
button.callback(button_cb);
if (!dvisual) Fl::visual(FL_RGB);
if (argv[1]) load_file(argv[1]);
window.resizable(window);
window.resizable(b);
Fl_Button print(300,425,50,25,"Print");
print.callback(print_cb);
window.show(argc,argv);
return Fl::run();
}