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277 lines
6.8 KiB
277 lines
6.8 KiB
/*
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* Copyright 2003 John M Bell <jmb202@ecs.soton.ac.uk>
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* \file
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* Content for image/x-riscos-sprite (RISC OS implementation).
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*
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* No conversion is necessary: we can render RISC OS sprites directly under
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* RISC OS.
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*/
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#include <string.h>
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#include <stdlib.h>
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#include "oslib/osspriteop.h"
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#include "utils/config.h"
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#include "utils/config.h"
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#include "utils/log.h"
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#include "utils/messages.h"
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#include "utils/utils.h"
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#include "netsurf/plotters.h"
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#include "netsurf/content.h"
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#include "content/llcache.h"
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#include "content/content.h"
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#include "content/content_protected.h"
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#include "content/content_factory.h"
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#include "riscos/gui.h"
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#include "riscos/image.h"
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#include "riscos/content-handlers/sprite.h"
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#ifdef WITH_SPRITE
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typedef struct sprite_content {
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struct content base;
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void *data;
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} sprite_content;
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static nserror sprite_create(const content_handler *handler,
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lwc_string *imime_type, const struct http_parameter *params,
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llcache_handle *llcache, const char *fallback_charset,
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bool quirks, struct content **c);
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static bool sprite_convert(struct content *c);
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static void sprite_destroy(struct content *c);
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static bool sprite_redraw(struct content *c, struct content_redraw_data *data,
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const struct rect *clip, const struct redraw_context *ctx);
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static nserror sprite_clone(const struct content *old, struct content **newc);
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static content_type sprite_content_type(void);
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static const content_handler sprite_content_handler = {
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.create = sprite_create,
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.data_complete = sprite_convert,
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.destroy = sprite_destroy,
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.redraw = sprite_redraw,
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.clone = sprite_clone,
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.type = sprite_content_type,
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.no_share = false,
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};
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static const char *sprite_types[] = {
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"image/x-riscos-sprite"
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};
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CONTENT_FACTORY_REGISTER_TYPES(sprite, sprite_types, sprite_content_handler)
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nserror sprite_create(const content_handler *handler,
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lwc_string *imime_type, const struct http_parameter *params,
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llcache_handle *llcache, const char *fallback_charset,
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bool quirks, struct content **c)
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{
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sprite_content *sprite;
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nserror error;
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sprite = calloc(1, sizeof(sprite_content));
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if (sprite == NULL)
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return NSERROR_NOMEM;
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error = content__init(&sprite->base, handler, imime_type, params,
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llcache, fallback_charset, quirks);
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if (error != NSERROR_OK) {
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free(sprite);
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return error;
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}
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*c = (struct content *) sprite;
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return NSERROR_OK;
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}
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/**
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* Convert a CONTENT_SPRITE for display.
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*
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* No conversion is necessary. We merely read the sprite dimensions.
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*/
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bool sprite_convert(struct content *c)
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{
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sprite_content *sprite = (sprite_content *) c;
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os_error *error;
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int w, h;
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union content_msg_data msg_data;
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const uint8_t *source_data;
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size_t source_size;
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const void *sprite_data;
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char *title;
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source_data = content__get_source_data(c, &source_size);
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sprite_data = source_data - 4;
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osspriteop_area *area = (osspriteop_area*) sprite_data;
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sprite->data = area;
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/* check for bad data */
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if ((int)source_size + 4 != area->used) {
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msg_data.errordata.errorcode = NSERROR_UNKNOWN;
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msg_data.errordata.errormsg = messages_get("BadSprite");
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content_broadcast(c, CONTENT_MSG_ERROR, &msg_data);
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return false;
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}
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error = xosspriteop_read_sprite_info(osspriteop_PTR,
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(osspriteop_area *)0x100,
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(osspriteop_id) ((char *) area + area->first),
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&w, &h, NULL, NULL);
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if (error) {
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NSLOG(netsurf, INFO,
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"xosspriteop_read_sprite_info: 0x%x: %s",
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error->errnum,
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error->errmess);
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msg_data.errordata.errorcode = NSERROR_UNKNOWN;
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msg_data.errordata.errormsg = error->errmess;
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content_broadcast(c, CONTENT_MSG_ERROR, &msg_data);
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return false;
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}
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c->width = w;
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c->height = h;
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/* set title text */
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title = messages_get_buff("SpriteTitle",
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nsurl_access_leaf(llcache_handle_get_url(c->llcache)),
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c->width, c->height);
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if (title != NULL) {
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content__set_title(c, title);
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free(title);
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}
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content_set_ready(c);
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content_set_done(c);
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/* Done: update status bar */
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content_set_status(c, "");
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return true;
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}
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/**
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* Destroy a CONTENT_SPRITE and free all resources it owns.
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*/
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void sprite_destroy(struct content *c)
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{
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/* do not free c->data.sprite.data at it is simply a pointer to
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* 4 bytes beforec->source_data. */
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}
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/**
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* Redraw a CONTENT_SPRITE.
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*/
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bool sprite_redraw(struct content *c, struct content_redraw_data *data,
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const struct rect *clip, const struct redraw_context *ctx)
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{
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sprite_content *sprite = (sprite_content *) c;
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if (ctx->plot->flush && (ctx->plot->flush(ctx) != NSERROR_OK))
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return false;
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return image_redraw(sprite->data,
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ro_plot_origin_x + data->x * 2,
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ro_plot_origin_y - data->y * 2,
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data->width, data->height,
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c->width,
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c->height,
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data->background_colour,
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false, false, false,
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IMAGE_PLOT_OS);
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}
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nserror sprite_clone(const struct content *old, struct content **newc)
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{
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sprite_content *sprite;
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nserror error;
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sprite = calloc(1, sizeof(sprite_content));
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if (sprite == NULL)
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return NSERROR_NOMEM;
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error = content__clone(old, &sprite->base);
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if (error != NSERROR_OK) {
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content_destroy(&sprite->base);
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return error;
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}
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/* Simply rerun convert */
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if (old->status == CONTENT_STATUS_READY ||
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old->status == CONTENT_STATUS_DONE) {
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if (sprite_convert(&sprite->base) == false) {
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content_destroy(&sprite->base);
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return NSERROR_CLONE_FAILED;
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}
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}
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*newc = (struct content *) sprite;
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return NSERROR_OK;
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}
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content_type sprite_content_type(void)
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{
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return CONTENT_IMAGE;
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}
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#endif
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/**
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* Returns the bit depth of a sprite
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*
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* \param s sprite
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* \return depth in bpp
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*/
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byte sprite_bpp(const osspriteop_header *s)
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{
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/* bit 31 indicates the presence of a full alpha channel
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* rather than a binary mask */
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int type = ((unsigned)s->mode >> osspriteop_TYPE_SHIFT) & 15;
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byte bpp = 0;
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switch (type) {
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case osspriteop_TYPE_OLD:
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{
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bits psr;
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int val;
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if (!xos_read_mode_variable(s->mode,
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os_MODEVAR_LOG2_BPP, &val, &psr) &&
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!(psr & _C))
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bpp = 1 << val;
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}
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break;
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case osspriteop_TYPE1BPP: bpp = 1; break;
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case osspriteop_TYPE2BPP: bpp = 2; break;
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case osspriteop_TYPE4BPP: bpp = 4; break;
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case osspriteop_TYPE8BPP: bpp = 8; break;
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case osspriteop_TYPE16BPP: bpp = 16; break;
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case osspriteop_TYPE32BPP: bpp = 32; break;
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case osspriteop_TYPE_CMYK: bpp = 32; break;
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}
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return bpp;
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}
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