netsurf/riscos/content-handlers/sprite.c
2016-05-02 16:09:28 +01:00

267 lines
6.5 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-riscos-sprite (RISC OS implementation).
*
* No conversion is necessary: we can render RISC OS sprites directly under
* RISC OS.
*/
#include <string.h>
#include <stdlib.h>
#include "oslib/osspriteop.h"
#include "utils/config.h"
#include "utils/config.h"
#include "utils/log.h"
#include "utils/messages.h"
#include "utils/utils.h"
#include "content/content_protected.h"
#include "desktop/plotters.h"
#include "riscos/gui.h"
#include "riscos/image.h"
#include "riscos/content-handlers/sprite.h"
#ifdef WITH_SPRITE
typedef struct sprite_content {
struct content base;
void *data;
} sprite_content;
static nserror sprite_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 sprite_convert(struct content *c);
static void sprite_destroy(struct content *c);
static bool sprite_redraw(struct content *c, struct content_redraw_data *data,
const struct rect *clip, const struct redraw_context *ctx);
static nserror sprite_clone(const struct content *old, struct content **newc);
static content_type sprite_content_type(void);
static const content_handler sprite_content_handler = {
.create = sprite_create,
.data_complete = sprite_convert,
.destroy = sprite_destroy,
.redraw = sprite_redraw,
.clone = sprite_clone,
.type = sprite_content_type,
.no_share = false,
};
static const char *sprite_types[] = {
"image/x-riscos-sprite"
};
CONTENT_FACTORY_REGISTER_TYPES(sprite, sprite_types, sprite_content_handler)
nserror sprite_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)
{
sprite_content *sprite;
nserror error;
sprite = calloc(1, sizeof(sprite_content));
if (sprite == NULL)
return NSERROR_NOMEM;
error = content__init(&sprite->base, handler, imime_type, params,
llcache, fallback_charset, quirks);
if (error != NSERROR_OK) {
free(sprite);
return error;
}
*c = (struct content *) sprite;
return NSERROR_OK;
}
/**
* Convert a CONTENT_SPRITE for display.
*
* No conversion is necessary. We merely read the sprite dimensions.
*/
bool sprite_convert(struct content *c)
{
sprite_content *sprite = (sprite_content *) c;
os_error *error;
int w, h;
union content_msg_data msg_data;
const char *source_data;
unsigned long source_size;
const void *sprite_data;
char *title;
source_data = content__get_source_data(c, &source_size);
sprite_data = source_data - 4;
osspriteop_area *area = (osspriteop_area*) sprite_data;
sprite->data = area;
/* check for bad data */
if ((int)source_size + 4 != area->used) {
msg_data.error = messages_get("BadSprite");
content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
return false;
}
error = xosspriteop_read_sprite_info(osspriteop_PTR,
(osspriteop_area *)0x100,
(osspriteop_id) ((char *) area + area->first),
&w, &h, NULL, NULL);
if (error) {
LOG("xosspriteop_read_sprite_info: 0x%x: %s", error->errnum, error->errmess);
msg_data.error = error->errmess;
content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
return false;
}
c->width = w;
c->height = h;
/* set title text */
title = messages_get_buff("SpriteTitle",
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_SPRITE and free all resources it owns.
*/
void sprite_destroy(struct content *c)
{
/* do not free c->data.sprite.data at it is simply a pointer to
* 4 bytes beforec->source_data. */
}
/**
* Redraw a CONTENT_SPRITE.
*/
bool sprite_redraw(struct content *c, struct content_redraw_data *data,
const struct rect *clip, const struct redraw_context *ctx)
{
sprite_content *sprite = (sprite_content *) c;
if (ctx->plot->flush && !ctx->plot->flush())
return false;
return image_redraw(sprite->data,
ro_plot_origin_x + data->x * 2,
ro_plot_origin_y - data->y * 2,
data->width, data->height,
c->width,
c->height,
data->background_colour,
false, false, false,
IMAGE_PLOT_OS);
}
nserror sprite_clone(const struct content *old, struct content **newc)
{
sprite_content *sprite;
nserror error;
sprite = calloc(1, sizeof(sprite_content));
if (sprite == NULL)
return NSERROR_NOMEM;
error = content__clone(old, &sprite->base);
if (error != NSERROR_OK) {
content_destroy(&sprite->base);
return error;
}
/* Simply rerun convert */
if (old->status == CONTENT_STATUS_READY ||
old->status == CONTENT_STATUS_DONE) {
if (sprite_convert(&sprite->base) == false) {
content_destroy(&sprite->base);
return NSERROR_CLONE_FAILED;
}
}
*newc = (struct content *) sprite;
return NSERROR_OK;
}
content_type sprite_content_type(void)
{
return CONTENT_IMAGE;
}
#endif
/**
* Returns the bit depth of a sprite
*
* \param s sprite
* \return depth in bpp
*/
byte sprite_bpp(const osspriteop_header *s)
{
/* bit 31 indicates the presence of a full alpha channel
* rather than a binary mask */
int type = ((unsigned)s->mode >> osspriteop_TYPE_SHIFT) & 15;
byte bpp = 0;
switch (type) {
case osspriteop_TYPE_OLD:
{
bits psr;
int val;
if (!xos_read_mode_variable(s->mode,
os_MODEVAR_LOG2_BPP, &val, &psr) &&
!(psr & _C))
bpp = 1 << val;
}
break;
case osspriteop_TYPE1BPP: bpp = 1; break;
case osspriteop_TYPE2BPP: bpp = 2; break;
case osspriteop_TYPE4BPP: bpp = 4; break;
case osspriteop_TYPE8BPP: bpp = 8; break;
case osspriteop_TYPE16BPP: bpp = 16; break;
case osspriteop_TYPE32BPP: bpp = 32; break;
case osspriteop_TYPE_CMYK: bpp = 32; break;
}
return bpp;
}