dt_picture.c

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/*
 * Copyright 2011 - 2012 Chris Young <chris@unsatisfactorysoftware.co.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
 * DataTypes picture handler (implementation)
*/
 
#ifdef WITH_AMIGA_DATATYPES
#include "amiga/os3support.h"
 
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <proto/datatypes.h>
#include <proto/dos.h>
#include <proto/intuition.h>
#include <datatypes/pictureclass.h>
#include <intuition/classusr.h>
 
#include "utils/log.h"
#include "utils/messages.h"
#include "netsurf/plotters.h"
#include "netsurf/bitmap.h"
#include "content/llcache.h"
#include "content/content.h"
#include "content/content_protected.h"
#include "content/content_factory.h"
#include "content/handlers/image/image_cache.h"
 
#include "amiga/bitmap.h"
#include "amiga/filetype.h"
#include "amiga/datatypes.h"
 
 
static nserror amiga_dt_picture_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 amiga_dt_picture_convert(struct content *c);
static nserror amiga_dt_picture_clone(const struct content *old, struct content **newc);
static void amiga_dt_picture_destroy(struct content *c);
 
static const content_handler amiga_dt_picture_content_handler = {
        .create = amiga_dt_picture_create,
        .data_complete = amiga_dt_picture_convert,
        .destroy = amiga_dt_picture_destroy,
        .redraw = image_cache_redraw,
        .clone = amiga_dt_picture_clone,
        .get_internal = image_cache_get_internal,
        .type = image_cache_content_type,
        .no_share = false,
};
 
struct amiga_dt_picture_content {
        struct content c;
        Object *dto;
};
 
nserror amiga_dt_picture_init(void)
{
        struct DataType *dt, *prevdt = NULL;
        lwc_string *type;
        nserror error;
        struct Node *node = NULL;
 
        while((dt = ObtainDataType(DTST_RAM, NULL,
                        DTA_DataType, prevdt,
                        DTA_GroupID, GID_PICTURE, // we only support images for now
                        TAG_DONE)) != NULL)
        {
                if(prevdt) ReleaseDataType(prevdt);
                prevdt = dt;
 
                do {
                        node = ami_mime_from_datatype(dt, &type, node);
 
                        if(node)
                        {
                                error = content_factory_register_handler(
                                        lwc_string_data(type), 
                                        &amiga_dt_picture_content_handler);
 
                                if (error != NSERROR_OK)
                                        return error;
                        }
 
                }while (node != NULL);
 
        }
 
        ReleaseDataType(prevdt);
 
        return NSERROR_OK;
}
 
nserror amiga_dt_picture_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)
{
        struct amiga_dt_picture_content *adt;
        nserror error;
 
        adt = calloc(1, sizeof(struct amiga_dt_picture_content));
        if (adt == NULL)
                return NSERROR_NOMEM;
 
        error = content__init((struct content *)adt, handler, imime_type, params,
                        llcache, fallback_charset, quirks);
        if (error != NSERROR_OK) {
                free(adt);
                return error;
        }
 
        *c = (struct content *)adt;
 
        return NSERROR_OK;
}
 
static Object *amiga_dt_picture_newdtobject(struct amiga_dt_picture_content *adt)
{
        const uint8_t *data;
        size_t size;
 
        if(adt->dto == NULL) {
                data = content__get_source_data((struct content *)adt, &size);
 
                adt->dto = NewDTObject(NULL,
                                        DTA_SourceType, DTST_MEMORY,
                                        DTA_SourceAddress, data,
                                        DTA_SourceSize, size,
                                        DTA_GroupID, GID_PICTURE,
                                        PDTA_DestMode, PMODE_V43,
                                        PDTA_PromoteMask, TRUE,
                                        TAG_DONE);
        }
 
        return adt->dto;
}
 
static char *amiga_dt_picture_datatype(struct content *c)
{
        const uint8_t *data;
        size_t size;
        struct DataType *dt;
        char *filetype = NULL;
        
        data = content__get_source_data(c, &size);
 
        if((dt = ObtainDataType(DTST_MEMORY, NULL,
                                        DTA_SourceAddress, data,
                                        DTA_SourceSize, size,
                                        DTA_GroupID, GID_PICTURE,
                                        TAG_DONE))) {
                filetype = strdup(dt->dtn_Header->dth_Name);
                ReleaseDataType(dt);
        }
        
        if(filetype == NULL) filetype = strdup("DataTypes");
        return filetype;
}
 
static struct bitmap *amiga_dt_picture_cache_convert(struct content *c)
{
        NSLOG(netsurf, INFO, "amiga_dt_picture_cache_convert");
 
        union content_msg_data msg_data;
        UBYTE *bm_buffer;
        Object *dto;
        struct bitmap *bitmap;
        struct amiga_dt_picture_content *adt = (struct amiga_dt_picture_content *)c;
 
        if((dto = amiga_dt_picture_newdtobject(adt)))
        {
                bitmap = amiga_bitmap_create(c->width, c->height, BITMAP_NONE);
                if (!bitmap) {
                        msg_data.errordata.errorcode = NSERROR_NOMEM;
                        msg_data.errordata.errormsg = messages_get("NoMemory");
                        content_broadcast(c, CONTENT_MSG_ERROR, &msg_data);
                        return NULL;
                }
 
                bm_buffer = amiga_bitmap_get_buffer(bitmap);
 
                IDoMethod(dto, PDTM_READPIXELARRAY,
                        bm_buffer, PBPAFMT_RGBA,
                        amiga_bitmap_get_rowstride(bitmap),
                        0, 0, c->width, c->height);
 
                amiga_bitmap_set_opaque(bitmap, bitmap_test_opaque(bitmap));
                
                DisposeDTObject(dto);
                adt->dto = NULL;
        }
        else return NULL;
 
        return bitmap;
}
 
bool amiga_dt_picture_convert(struct content *c)
{
        NSLOG(netsurf, INFO, "amiga_dt_picture_convert");
 
        int width, height;
        char *title;
        Object *dto;
        struct BitMapHeader *bmh;
        char *filetype;
 
        if((dto = amiga_dt_picture_newdtobject((struct amiga_dt_picture_content *)c))) {
                if(GetDTAttrs(dto, PDTA_BitMapHeader, &bmh, TAG_DONE)) {
                        width = (int)bmh->bmh_Width;
                        height = (int)bmh->bmh_Height;
                }
                else return false;
        }
        else return false;
 
        c->width = width;
        c->height = height;
        c->size = width * height * 4;
 
        /* set title text */
        if((filetype = amiga_dt_picture_datatype(c))) {
                title = messages_get_buff("DataTypesTitle",
                        nsurl_access_leaf(llcache_handle_get_url(c->llcache)),
                        filetype, c->width, c->height);
                if (title != NULL) {
                        content__set_title(c, title);
                        free(title);
                }
                free(filetype);
        }
        
        image_cache_add(c, NULL, amiga_dt_picture_cache_convert);
 
        content_set_ready(c);
        content_set_done(c);
        content_set_status(c, "");
        return true;
}
 
nserror amiga_dt_picture_clone(const struct content *old, struct content **newc)
{
        struct content *adt;
        nserror error;
 
        NSLOG(netsurf, INFO, "amiga_dt_picture_clone");
 
        adt = calloc(1, sizeof(struct content));
        if (adt == NULL)
                return NSERROR_NOMEM;
 
        error = content__clone(old, adt);
        if (error != NSERROR_OK) {
                content_destroy(adt);
                return error;
        }
 
        /* We "clone" the old content by replaying conversion */
        if ((old->status == CONTENT_STATUS_READY) || 
            (old->status == CONTENT_STATUS_DONE)) {
                if (amiga_dt_picture_convert(adt) == false) {
                        content_destroy(adt);
                        return NSERROR_CLONE_FAILED;
                }
        }
 
        *newc = adt;
 
        return NSERROR_OK;
}
 
static void amiga_dt_picture_destroy(struct content *c)
{
        struct amiga_dt_picture_content *adt = (struct amiga_dt_picture_content *)c;
 
        DisposeDTObject(adt->dto);
        adt->dto = NULL;
        
        image_cache_destroy(c);
}
 
#endif