netsurf/riscos/jpeg.c

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/*
* This file is part of NetSurf, http://netsurf.sourceforge.net/
* Licensed under the GNU General Public License,
* http://www.opensource.org/licenses/gpl-license
* Copyright 2003 James Bursa <bursa@users.sourceforge.net>
*/
/**
* This is just a temporary implementation using the JPEG renderer
* available in some versions of RISC OS.
*/
#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include "netsurf/content/content.h"
#include "netsurf/riscos/jpeg.h"
#include "netsurf/utils/utils.h"
#include "oslib/jpeg.h"
void jpeg_create(struct content *c)
{
c->data.jpeg.data = xcalloc(0, 1);
c->data.jpeg.length = 0;
}
void jpeg_process_data(struct content *c, char *data, unsigned long size)
{
c->data.jpeg.data = xrealloc(c->data.jpeg.data, c->data.jpeg.length + size);
memcpy(c->data.jpeg.data + c->data.jpeg.length, data, size);
c->data.jpeg.length += size;
c->size += size;
}
int jpeg_convert(struct content *c, unsigned int width, unsigned int height)
{
os_error *error;
int w, h;
error = xjpeginfo_dimensions(c->data.jpeg.data, (int) c->data.jpeg.length,
0, &w, &h, 0, 0, 0);
if (error != 0)
return 1;
c->width = w;
c->height = h;
c->title = xcalloc(100, 1);
sprintf(c->title, "JPEG image (%ux%u, %lu bytes)", w, h, c->data.jpeg.length);
c->status = CONTENT_STATUS_DONE;
return 0;
}
void jpeg_revive(struct content *c, unsigned int width, unsigned int height)
{
}
void jpeg_reformat(struct content *c, unsigned int width, unsigned int height)
{
}
void jpeg_destroy(struct content *c)
{
xfree(c->data.jpeg.data);
xfree(c->title);
}
void jpeg_redraw(struct content *c, long x, long y,
unsigned long width, unsigned long height,
long clip_x0, long clip_y0, long clip_x1, long clip_y1)
{
os_factors factors;
factors.xmul = width;
factors.ymul = height;
factors.xdiv = c->width * 2;
factors.ydiv = c->height * 2;
xjpeg_plot_scaled((jpeg_image *) c->data.jpeg.data,
x, y - height,
&factors, (int) c->data.jpeg.length,
jpeg_SCALE_DITHERED);
}