diff options
Diffstat (limited to 'frontends/riscos/content-handlers/sprite.c')
| -rw-r--r-- | frontends/riscos/content-handlers/sprite.c | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/frontends/riscos/content-handlers/sprite.c b/frontends/riscos/content-handlers/sprite.c new file mode 100644 index 000000000..12fed4931 --- /dev/null +++ b/frontends/riscos/content-handlers/sprite.c @@ -0,0 +1,266 @@ +/* + * 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; +} |