netsurf/frontends/riscos/content-handlers/draw.c
Daniel Silverstone 49a82109ce riscos: Deal with silly typos. I'm too tired now.
Signed-off-by: Daniel Silverstone <dsilvers@digital-scurf.org>
2019-08-05 22:18:50 +01:00

260 lines
6.4 KiB
C

/*
* Copyright 2003 John M Bell <jmb202@ecs.soton.ac.uk>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf 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; version 2 of the License.
*
* NetSurf 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, see <http://www.gnu.org/licenses/>.
*/
/** \file
* Content for image/x-drawfile (RISC OS implementation).
*
* The DrawFile module is used to plot the DrawFile.
*/
#include "utils/config.h"
#ifdef WITH_DRAW
#include <string.h>
#include <stdlib.h>
#include "oslib/drawfile.h"
#include "utils/config.h"
#include "utils/log.h"
#include "utils/messages.h"
#include "utils/utils.h"
#include "netsurf/plotters.h"
#include "netsurf/content.h"
#include "content/content_protected.h"
#include "content/llcache.h"
#include "riscos/content-handlers/draw.h"
#include "riscos/gui.h"
typedef struct draw_content {
struct content base;
int x0, y0;
} draw_content;
static nserror draw_create(const content_handler *handler,
lwc_string *imime_type, const struct http_parameter *params,
llcache_handle *llcache, const char *fallback_charset,
bool quirks, struct content **c);
static bool draw_convert(struct content *c);
static void draw_destroy(struct content *c);
static bool draw_redraw(struct content *c, struct content_redraw_data *data,
const struct rect *clip, const struct redraw_context *ctx);
static nserror draw_clone(const struct content *old, struct content **newc);
static content_type draw_content_type(void);
static const content_handler draw_content_handler = {
.create = draw_create,
.data_complete = draw_convert,
.destroy = draw_destroy,
.redraw = draw_redraw,
.clone = draw_clone,
.type = draw_content_type,
.no_share = false,
};
static const char *draw_types[] = {
"application/drawfile",
"application/x-drawfile",
"image/drawfile",
"image/x-drawfile"
};
CONTENT_FACTORY_REGISTER_TYPES(draw, draw_types, draw_content_handler)
nserror draw_create(const content_handler *handler,
lwc_string *imime_type, const struct http_parameter *params,
llcache_handle *llcache, const char *fallback_charset,
bool quirks, struct content **c)
{
draw_content *draw;
nserror error;
draw = calloc(1, sizeof(draw_content));
if (draw == NULL)
return NSERROR_NOMEM;
error = content__init(&draw->base, handler, imime_type, params,
llcache, fallback_charset, quirks);
if (error != NSERROR_OK) {
free(draw);
return error;
}
*c = (struct content *) draw;
return NSERROR_OK;
}
/**
* 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)
{
draw_content *draw = (draw_content *) c;
union content_msg_data msg_data;
const uint8_t *source_data;
size_t source_size;
const void *data;
os_box bbox;
os_error *error;
char *title;
source_data = content__get_source_data(c, &source_size);
data = source_data;
/* BBox contents in Draw units (256*OS unit) */
error = xdrawfile_bbox(0, (drawfile_diagram *) data,
(int) source_size, 0, &bbox);
if (error) {
NSLOG(netsurf, INFO, "xdrawfile_bbox: 0x%x: %s",
error->errnum, error->errmess);
msg_data.errordata.errorcode = NSERROR_UNKNOWN;
msg_data.errordata.errormsg = error->errmess;
content_broadcast(c, CONTENT_MSG_ERROR, &msg_data);
return false;
}
if (bbox.x1 > bbox.x0 && bbox.y1 > bbox.y0) {
/* 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);
}
else
/* invalid/undefined bounding box */
c->height = c->width = 0;
draw->x0 = bbox.x0;
draw->y0 = bbox.y0;
title = messages_get_buff("DrawTitle",
nsurl_access_leaf(llcache_handle_get_url(c->llcache)),
c->width, c->height);
if (title != NULL) {
content__set_title(c, title);
free(title);
}
content_set_ready(c);
content_set_done(c);
/* Done: update status bar */
content_set_status(c, "");
return true;
}
/**
* Destroy a CONTENT_DRAW and free all resources it owns.
*/
void draw_destroy(struct content *c)
{
}
/**
* Redraw a CONTENT_DRAW.
*/
bool draw_redraw(struct content *c, struct content_redraw_data *data,
const struct rect *clip, const struct redraw_context *ctx)
{
draw_content *draw = (draw_content *) c;
os_trfm matrix;
const uint8_t *source_data;
size_t source_size;
const void *src_data;
os_error *error;
if (ctx->plot->flush && (ctx->plot->flush(ctx) != NSERROR_OK))
return false;
if (!c->width || !c->height)
return false;
source_data = content__get_source_data(c, &source_size);
src_data = source_data;
/* Scaled image. Transform units (65536*OS units) */
matrix.entries[0][0] = data->width * 65536 / c->width;
matrix.entries[0][1] = 0;
matrix.entries[1][0] = 0;
matrix.entries[1][1] = data->height * 65536 / c->height;
/* Draw units. (x,y) = bottom left */
matrix.entries[2][0] = ro_plot_origin_x * 256 + data->x * 512 -
draw->x0 * data->width / c->width;
matrix.entries[2][1] = ro_plot_origin_y * 256 -
(data->y + data->height) * 512 -
draw->y0 * data->height / c->height;
error = xdrawfile_render(0, (drawfile_diagram *) src_data,
(int) source_size, &matrix, 0, 0);
if (error) {
NSLOG(netsurf, INFO, "xdrawfile_render: 0x%x: %s",
error->errnum, error->errmess);
return false;
}
return true;
}
/**
* Clone a CONTENT_DRAW
*/
nserror draw_clone(const struct content *old, struct content **newc)
{
draw_content *draw;
nserror error;
draw = calloc(1, sizeof(draw_content));
if (draw == NULL)
return NSERROR_NOMEM;
error = content__clone(old, &draw->base);
if (error != NSERROR_OK) {
content_destroy(&draw->base);
return error;
}
/* Simply rerun convert */
if (old->status == CONTENT_STATUS_READY ||
old->status == CONTENT_STATUS_DONE) {
if (draw_convert(&draw->base) == false) {
content_destroy(&draw->base);
return NSERROR_CLONE_FAILED;
}
}
*newc = (struct content *) draw;
return NSERROR_OK;
}
content_type draw_content_type(void)
{
return CONTENT_IMAGE;
}
#endif