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/*
* File: image.cc
*
* Copyright (C) 2005-2007 Jorge Arellano Cid <jcid@dillo.org>,
* Sebastian Geerken <sgeerken@dillo.org>
*
* 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 3 of the License, or
* (at your option) any later version.
*/
/* @file
* Implements image data transfer methods. It handles the transfer
* of data from an Image to a DwImage widget.
*/
#include "msg.h"
#include "image.hh"
#include "dw/core.hh"
#include "dw/image.hh"
using namespace dw::core;
/** Image to Object-ImgRenderer macro */
#define I2IR(Image) ((dw::core::ImgRenderer*)(Image->img_rndr))
/**
* Create and initialize a new image structure.
*/
DilloImage *a_Image_new(void *layout, void *img_rndr, int32_t bg_color)
{
DilloImage *Image;
Image = dNew(DilloImage, 1);
Image->layout = layout;
Image->img_rndr = img_rndr;
Image->width = 0;
Image->height = 0;
Image->bg_color = bg_color;
Image->ScanNumber = 0;
Image->BitVec = NULL;
Image->State = IMG_Empty;
Image->RefCount = 0;
return Image;
}
/**
* Create and initialize a new image structure with an image widget.
*/
DilloImage *a_Image_new_with_dw(void *layout, const char *alt_text,
int32_t bg_color)
{
dw::Image *dw = new dw::Image(alt_text);
return a_Image_new(layout, (void*)(dw::core::ImgRenderer*)dw, bg_color);
}
/**
* Return the image renderer as a widget. This is somewhat tricky,
* since simple casting leads to wrong (and hard to debug) results,
* because of multiple inheritance. This function can be used from C
* code, where only access to void* is possible.
*/
void *a_Image_get_dw(DilloImage *Image)
{
return (dw::Image*)(dw::core::ImgRenderer*)Image->img_rndr;
}
/**
* Deallocate an Image structure
*/
static void Image_free(DilloImage *Image)
{
a_Bitvec_free(Image->BitVec);
dFree(Image);
}
/**
* Unref and free if necessary
* Do nothing if the argument is NULL
*/
void a_Image_unref(DilloImage *Image)
{
_MSG(" %d ", Image->RefCount);
if (Image && --Image->RefCount == 0)
Image_free(Image);
}
/**
* Add a reference to an Image struct
* Do nothing if the argument is NULL
*/
void a_Image_ref(DilloImage *Image)
{
if (Image)
++Image->RefCount;
}
/**
* Set initial parameters of the image
*/
void a_Image_set_parms(DilloImage *Image, void *v_imgbuf, DilloUrl *url,
int version, uint_t width, uint_t height,
DilloImgType type)
{
_MSG("a_Image_set_parms: width=%d height=%d iw=%d ih=%d\n",
width, height, Image->width, Image->height);
/* Resize from 0,0 to width,height */
bool resize = true;
I2IR(Image)->setBuffer((Imgbuf*)v_imgbuf, resize);
if (!Image->BitVec)
Image->BitVec = a_Bitvec_new(height);
Image->width = width;
Image->height = height;
Image->State = IMG_SetParms;
}
/**
* Implement the write method
*/
void a_Image_write(DilloImage *Image, uint_t y)
{
_MSG("a_Image_write\n");
dReturn_if_fail ( y < Image->height );
/* Update the row in DwImage */
I2IR(Image)->drawRow(y);
a_Bitvec_set_bit(Image->BitVec, y);
Image->State = IMG_Write;
}
/**
* Implement the close method
*/
void a_Image_close(DilloImage *Image)
{
_MSG("a_Image_close\n");
I2IR(Image)->finish();
}
/**
* Implement the abort method
*/
void a_Image_abort(DilloImage *Image)
{
_MSG("a_Image_abort\n");
I2IR(Image)->fatal();
}
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