netsurf/riscos/draw.c

112 lines
2.7 KiB
C

/*
* 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 John M Bell <jmb202@ecs.soton.ac.uk>
*/
/** \file
* Content for image/x-drawfile (RISC OS implementation).
*
* The DrawFile module is used to plot the DrawFile.
*/
#include <string.h>
#include <stdlib.h>
#include "oslib/drawfile.h"
#include "netsurf/utils/config.h"
#include "netsurf/content/content.h"
#include "netsurf/riscos/draw.h"
#include "netsurf/riscos/gui.h"
#include "netsurf/utils/utils.h"
#include "netsurf/utils/messages.h"
#include "netsurf/utils/log.h"
#ifdef WITH_DRAW
/**
* Convert a CONTENT_DRAW for display.
*
* No conversion is necessary. We merely read the DrawFile dimensions and
* bounding box bottom-left.
*/
bool draw_convert(struct content *c, int width, int height)
{
union content_msg_data msg_data;
os_box bbox;
os_error *error;
/* BBox contents in Draw units (256*OS unit) */
error = xdrawfile_bbox(0, (drawfile_diagram*)(c->source_data),
(int) c->source_size, 0, &bbox);
if (error) {
LOG(("xdrawfile_bbox: 0x%x: %s",
error->errnum, error->errmess));
msg_data.error = error->errmess;
content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
return false;
}
/* c->width & c->height stored as (OS units/2)
=> divide by 512 to convert from draw units */
c->width = ((bbox.x1 - bbox.x0) / 512);
c->height = ((bbox.y1 - bbox.y0) / 512);
c->data.draw.x0 = bbox.x0;
c->data.draw.y0 = bbox.y0;
c->title = malloc(100);
if (c->title)
snprintf(c->title, 100, messages_get("DrawTitle"), c->width,
c->height, c->source_size);
c->status = CONTENT_STATUS_DONE;
return true;
}
/**
* Destroy a CONTENT_DRAW and free all resources it owns.
*/
void draw_destroy(struct content *c)
{
free(c->title);
}
/**
* Redraw a CONTENT_DRAW.
*/
bool draw_redraw(struct content *c, int x, int y,
int width, int height,
int clip_x0, int clip_y0, int clip_x1, int clip_y1,
float scale, colour background_colour)
{
os_error *error;
os_trfm matrix;
/* Scaled image. Transform units (65536*OS units) */
matrix.entries[0][0] = width * 65536 / c->width;
matrix.entries[0][1] = 0;
matrix.entries[1][0] = 0;
matrix.entries[1][1] = height * 65536 / c->height;
/* Draw units. (x,y) = bottom left */
matrix.entries[2][0] = ro_plot_origin_x * 256 + x * 512 -
c->data.draw.x0 * width / c->width;
matrix.entries[2][1] = ro_plot_origin_y * 256 - (y + height) * 512 -
c->data.draw.y0 * height / c->height;
error = xdrawfile_render(0, (drawfile_diagram*)(c->source_data),
(int)c->source_size, &matrix, 0, 0);
if (error) {
LOG(("xdrawfile_render: 0x%x: %s",
error->errnum, error->errmess));
return false;
}
return true;
}
#endif