gambas-source-code/gb.gtk/src/CPicture.cpp

/***************************************************************************

  CPicture.cpp

  (c) 2004-2006 - Daniel Campos Fernández <dcamposf@gmail.com>

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2, or (at your option)
  any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

***************************************************************************/

#define __CPICTURE_CPP

#include "main.h"
#include "gambas.h"
#include "widgets.h"
#include "ggambastag.h"
#include "CDraw.h"
#include "cpaint_impl.h"
#include "CScreen.h"
#include "CImage.h"
#include "CPicture.h"

CPICTURE *CPICTURE_create(gPicture *picture)
{
	CPICTURE *pic;
	GB.New((void **)POINTER(&pic), GB.FindClass("Picture"), 0, 0);
	if (picture)
	{
		pic->picture->unref();
		pic->picture = picture;
		picture->getPixmap();
		picture->setTag(new gGambasTag((void *)pic));
	}
	return pic;
}

void* GTK_GetPicture(GdkPixbuf *buf)
{
	CPICTURE *pic = CPICTURE_create(new gPicture(buf));
	g_object_ref(buf);
	return (void*)pic;
}

/*******************************************************************************

Picture Cache

********************************************************************************/

static GHashTable *_cache = NULL;

static void destroy_key(char *key)
{
  //fprintf(stderr, "destroy_key: '%s'\n", key);
  g_free(key);
}

static void destroy_value(CPICTURE *pic)
{
  //fprintf(stderr, "destroy_value: %p\n", pic);
  GB.Unref((void **)POINTER(&pic));
}

static CPICTURE *cache_get(char *key)
{
	if (!_cache) 
    return NULL;
	
	return (CPICTURE *)g_hash_table_lookup(_cache, (gconstpointer)key);
}

static void cache_add(char *key, CPICTURE *pic)
{
	if (!_cache) 
    _cache = g_hash_table_new_full(g_str_hash, g_str_equal, (GDestroyNotify)destroy_key, (GDestroyNotify)destroy_value);

  if (!key || !*key) 
    return;
  
	GB.Ref((void *)pic);
	//fprintf(stderr, "cache_add: '%s' %p\n", key, pic);
	g_hash_table_replace(_cache, (gpointer)g_strdup(key), (gpointer)pic);
}

static void cache_flush()
{
	if (!_cache) 
    return;

  g_hash_table_destroy(_cache);
	_cache = NULL;
}

/*******************************************************************************

  class Picture

*******************************************************************************/

#define LOAD_IMAGE_FUNC CPICTURE_load_image

#define IMAGE_TYPE gPicture

#define CREATE_IMAGE_FROM_MEMORY(_image, _addr, _len, _ok) \
	_image = gPicture::fromMemory(_addr, _len);

#define DELETE_IMAGE(_image) 

#define CREATE_PICTURE_FROM_IMAGE(_cpicture, _image) \
	_cpicture = CPICTURE_create(_image);

#define GET_FROM_CACHE(_key) (cache_get(_key))

#define GET_FROM_STOCK(_name, _len) gPicture::fromNamedIcon(_name, _len)

#define INSERT_INTO_CACHE(_key, _cpicture) cache_add((_key), (_cpicture))

#define APPLICATION_THEME CAPPLICATION_Theme

#include "gb.form.picture.h"


BEGIN_METHOD(CPICTURE_get, GB_STRING path)

  GB.ReturnObject(get_picture(STRING(path), LENGTH(path)));

END_METHOD


BEGIN_METHOD(CPICTURE_put, GB_OBJECT picture; GB_STRING path)

  set_picture(STRING(path), LENGTH(path), (CPICTURE *)VARG(picture));

END_METHOD


BEGIN_METHOD_VOID(CPICTURE_flush)

	cache_flush();

END_METHOD


BEGIN_METHOD(CPICTURE_new, GB_INTEGER w; GB_INTEGER h; GB_BOOLEAN trans)

  int w = VARGOPT(w, 0);
  int h = VARGOPT(h, 0);
  bool trans = VARGOPT(trans, false);

	PICTURE = new gPicture(gPicture::SERVER, w, h, trans);
	PICTURE->setTag(new gGambasTag(THIS));
	
END_METHOD


BEGIN_METHOD_VOID(CPICTURE_free)

	if (PICTURE) PICTURE->unref();

END_METHOD


BEGIN_METHOD(CPICTURE_resize, GB_INTEGER width; GB_INTEGER height)

	PICTURE->resize(VARG(width),VARG(height));

END_METHOD


BEGIN_PROPERTY(CPICTURE_width)

	GB.ReturnInteger(PICTURE->width());

END_PROPERTY


BEGIN_PROPERTY(CPICTURE_height)

	GB.ReturnInteger(PICTURE->height());

END_PROPERTY


BEGIN_PROPERTY(CPICTURE_depth)

	GB.ReturnInteger(PICTURE->depth());

END_PROPERTY


BEGIN_METHOD(CPICTURE_load, GB_STRING path)

	CPICTURE *picture;
	char *addr;
	int len;

	if (!GB.LoadFile(STRING(path), LENGTH(path), &addr, &len))
	{
		gPicture *pic = gPicture::fromMemory(addr, len);
		GB.ReleaseFile(addr, len);
		
		if (pic)
		{
			picture = CPICTURE_create(pic);
			GB.ReturnObject(picture);
			return;
		}
	}

	GB.Error("Unable to load picture");

END_METHOD

/*
BEGIN_METHOD(CPICTURE_fromMemory,GB_STRING data;)

	CPICTURE *pic=NULL;

	if (!LENGTH(data)) return;

	GB.New((void **)&pic, GB.FindClass("Picture"), 0, 0);
	pic->picture->fromMemory(STRING(data),LENGTH(data));
	GB.ReturnObject(pic);


END_METHOD
*/

BEGIN_METHOD(CPICTURE_save, GB_STRING path; GB_INTEGER quality)

	switch (PICTURE->save(GB.FileName(STRING(path), LENGTH(path)), VARGOPT(quality, -1)))
	{
		case 0: break;
		case -1: GB.Error("Unknown format"); break;
		case -2: GB.Error("Unable to save picture"); break;
	}

END_METHOD


BEGIN_METHOD_VOID(CPICTURE_clear)

  PICTURE->clear();

END_METHOD


BEGIN_METHOD(CPICTURE_fill, GB_INTEGER col)

	PICTURE->fill(VARG(col));

END_METHOD


BEGIN_METHOD(CPICTURE_copy, GB_INTEGER x; GB_INTEGER y; GB_INTEGER w; GB_INTEGER h)

	CPICTURE *pic=NULL;
	int x=0;
	int y=0;
	int w=PICTURE->width();
	int h=PICTURE->height();

	if (!MISSING(x)) x=VARG(x);
	if (!MISSING(y)) y=VARG(y);
	if (!MISSING(w)) w=VARG(w);
	if (!MISSING(h)) h=VARG(h);

  pic = CPICTURE_create(PICTURE->copy(x, y, w, h));
	GB.ReturnObject(pic);

END_METHOD


BEGIN_PROPERTY(CPICTURE_image)

	CIMAGE *img = CIMAGE_create(PICTURE->copy());
	CIMAGE_get(img)->getPixbuf();
	GB.ReturnObject((void*)img);

END_PROPERTY

BEGIN_PROPERTY(CPICTURE_transparent)

	if (READ_PROPERTY) { GB.ReturnBoolean(PICTURE->isTransparent()); return; }
	PICTURE->setTransparent(VPROP(GB_BOOLEAN));

END_PROPERTY


GB_DESC CPictureDesc[] =
{
  GB_DECLARE("Picture", sizeof(CPICTURE)),

  //GB_STATIC_METHOD("_exit", NULL, CPICTURE_flush, NULL),

  GB_METHOD("_new", 0, CPICTURE_new, "[(Width)i(Height)i(Transparent)b]"),
  GB_METHOD("_free", 0, CPICTURE_free, 0),
  GB_STATIC_METHOD("_exit",0,CPICTURE_flush,0),

  GB_STATIC_METHOD("_get", "Picture", CPICTURE_get, "(Path)s"),
  GB_STATIC_METHOD("_put", 0, CPICTURE_put, "(Picture)Picture;(Path)s"),
  GB_STATIC_METHOD("Flush", 0, CPICTURE_flush, 0),

  GB_PROPERTY_READ("Width", "i", CPICTURE_width),
  GB_PROPERTY_READ("Height", "i", CPICTURE_height),
  GB_PROPERTY_READ("W", "i", CPICTURE_width),
  GB_PROPERTY_READ("H", "i", CPICTURE_height),
  GB_PROPERTY_READ("Depth", "i", CPICTURE_depth),
  GB_PROPERTY("Transparent", "b", CPICTURE_transparent),

  GB_STATIC_METHOD("Load", "Picture", CPICTURE_load, "(Path)s"),
  GB_METHOD("Save", 0, CPICTURE_save, "(Path)s[(Quality)i]"),
  GB_METHOD("Resize", 0, CPICTURE_resize, "(Width)i(Height)i"),

  GB_METHOD("Clear", 0, CPICTURE_clear, 0),
  GB_METHOD("Fill", 0, CPICTURE_fill, "(Color)i"),

  GB_METHOD("Copy", "Picture", CPICTURE_copy, "[(X)i(Y)i(Width)i(Height)i]"),
  GB_PROPERTY_READ("Image", "Image", CPICTURE_image),

  GB_INTERFACE("Draw", &DRAW_Interface),
  GB_INTERFACE("Paint", &PAINT_Interface),

  GB_END_DECLARE
};