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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.
*/
/*
* This file implements image data transfer methods. It handles the transfer
* of data from an Image to a DwImage widget.
*/
#include <stdio.h>
#include <string.h>
#include "msg.h"
#include "image.hh"
#include "dw/core.hh"
#include "dw/image.hh"
using namespace dw::core;
// Image to Object-Image macro
#define OI(Image) ((dw::Image*)(Image->dw))
/*
* Local data
*/
static size_t linebuf_size = 0;
static uchar_t *linebuf = NULL;
/*
* Create and initialize a new image structure.
*/
DilloImage *a_Image_new(int width,
int height,
const char *alt_text,
int32_t bg_color)
{
DilloImage *Image;
Image = dNew(DilloImage, 1);
Image->dw = (void*) new dw::Image(alt_text);
Image->width = 0;
Image->height = 0;
Image->cmap = NULL;
Image->in_type = DILLO_IMG_TYPE_NOTSET;
Image->bg_color = bg_color;
Image->ProcessedBytes = 0;
Image->ScanNumber = 0;
Image->BitVec = NULL;
Image->State = IMG_Empty;
Image->RefCount = 1;
return Image;
}
/*
* Deallocate an Image structure
*/
static void Image_free(DilloImage *Image)
{
a_Bitvec_free(Image->BitVec);
dFree(Image);
}
/*
* Unref and free if necessary
*/
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
*/
void a_Image_ref(DilloImage *Image)
{
if (Image)
++Image->RefCount;
}
/*
* Decode 'buf' (an image line) into RGB format.
*/
static uchar_t *
Image_line(DilloImage *Image, const uchar_t *buf, const uchar_t *cmap, int y)
{
uint_t x;
switch (Image->in_type) {
case DILLO_IMG_TYPE_INDEXED:
if (cmap) {
for (x = 0; x < Image->width; x++)
memcpy(linebuf + x * 3, cmap + buf[x] * 3, 3);
} else {
MSG("Gif:: WARNING, image lacks a color map\n");
}
break;
case DILLO_IMG_TYPE_GRAY:
for (x = 0; x < Image->width; x++)
memset(linebuf + x * 3, buf[x], 3);
break;
case DILLO_IMG_TYPE_RGB:
/* avoid a memcpy here! --Jcid */
return (uchar_t *)buf;
case DILLO_IMG_TYPE_NOTSET:
MSG_ERR("Image_line: type not set...\n");
break;
}
return linebuf;
}
/*
* 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\n", width, height);
bool resize = (Image->width != width || Image->height != height);
OI(Image)->setBuffer((Imgbuf*)v_imgbuf, resize);
if (!Image->BitVec)
Image->BitVec = a_Bitvec_new(height);
Image->in_type = type;
Image->width = width;
Image->height = height;
if (3 * width > linebuf_size) {
linebuf_size = 3 * width;
linebuf = (uchar_t*) dRealloc(linebuf, linebuf_size);
}
Image->State = IMG_SetParms;
}
/*
* Reference the dicache entry color map
*/
void a_Image_set_cmap(DilloImage *Image, const uchar_t *cmap)
{
Image->cmap = cmap;
Image->State = IMG_SetCmap;
}
/*
* Begin a new scan for a multiple-scan image
*/
void a_Image_new_scan(DilloImage *Image, void *v_imgbuf)
{
a_Bitvec_clear(Image->BitVec);
Image->ScanNumber++;
((Imgbuf*)v_imgbuf)->newScan();
}
/*
* Implement the write method
*/
void a_Image_write(DilloImage *Image, void *v_imgbuf,
const uchar_t *buf, uint_t y, int decode)
{
uchar_t *newbuf;
dReturn_if_fail ( y < Image->height );
if (decode) {
/* Decode 'buf' and copy it into the DicEntry buffer */
newbuf = Image_line(Image, buf, Image->cmap, y);
((Imgbuf*)v_imgbuf)->copyRow(y, (byte *)newbuf);
}
a_Bitvec_set_bit(Image->BitVec, y);
Image->State = IMG_Write;
/* Update the row in DwImage */
OI(Image)->drawRow(y);
}
/*
* Implement the close method
*/
void a_Image_close(DilloImage *Image)
{
a_Image_unref(Image);
}
// Wrappers for Imgbuf -------------------------------------------------------
/*
* Increment reference count for an Imgbuf
*/
void a_Image_imgbuf_ref(void *v_imgbuf)
{
((Imgbuf*)v_imgbuf)->ref();
}
/*
* Decrement reference count for an Imgbuf
*/
void a_Image_imgbuf_unref(void *v_imgbuf)
{
((Imgbuf*)v_imgbuf)->unref();
}
/*
* Create a new Imgbuf
*/
void *a_Image_imgbuf_new(void *v_dw, int img_type, int width, int height)
{
Layout *layout = ((Widget*)v_dw)->getLayout();
if (!layout) {
MSG_ERR("a_Image_imgbuf_new: layout is NULL.\n");
exit(1);
}
return (void*)layout->createImgbuf(Imgbuf::RGB, width, height);
}
/*
* Last reference for this Imgbuf?
*/
int a_Image_imgbuf_last_reference(void *v_imgbuf)
{
return ((Imgbuf*)v_imgbuf)->lastReference () ? 1 : 0;
}
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