netsurf/image/bmp.c

287 lines
7.0 KiB
C

/*
* Copyright 2006 Richard Wilson <info@tinct.net>
* Copyright 2008 Sean Fox <dyntryx@gmail.com>
*
* 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/bmp (implementation)
*/
#include <assert.h>
#include <string.h>
#include <stdbool.h>
#include <stdlib.h>
#include <libnsbmp.h>
#include "utils/config.h"
#include "content/content_protected.h"
#include "content/hlcache.h"
#include "desktop/plotters.h"
#include "utils/log.h"
#include "utils/messages.h"
#include "utils/talloc.h"
#include "utils/utils.h"
#include "image/bitmap.h"
#include "image/bmp.h"
typedef struct nsbmp_content {
struct content base;
bmp_image *bmp; /** BMP image data */
struct bitmap *bitmap; /**< Created NetSurf bitmap */
} nsbmp_content;
static nserror nsbmp_create_bmp_data(nsbmp_content *bmp)
{
union content_msg_data msg_data;
bmp->bmp = calloc(sizeof(struct bmp_image), 1);
if (bmp->bmp == NULL) {
msg_data.error = messages_get("NoMemory");
content_broadcast(&bmp->base, CONTENT_MSG_ERROR, msg_data);
return NSERROR_NOMEM;
}
bmp_create(bmp->bmp, &bmp_bitmap_callbacks);
return NSERROR_OK;
}
static nserror nsbmp_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)
{
nsbmp_content *bmp;
nserror error;
bmp = talloc_zero(0, nsbmp_content);
if (bmp == NULL)
return NSERROR_NOMEM;
error = content__init(&bmp->base, handler, imime_type, params,
llcache, fallback_charset, quirks);
if (error != NSERROR_OK) {
talloc_free(bmp);
return error;
}
error = nsbmp_create_bmp_data(bmp);
if (error != NSERROR_OK) {
talloc_free(bmp);
return error;
}
*c = (struct content *) bmp;
return NSERROR_OK;
}
/**
* Callback for libnsbmp; forwards the call to bitmap_create()
*
* \param width width of image in pixels
* \param height width of image in pixels
* \param state a flag word indicating the initial state
* \return an opaque struct bitmap, or NULL on memory exhaustion
*/
static void *nsbmp_bitmap_create(int width, int height, unsigned int bmp_state)
{
unsigned int bitmap_state = BITMAP_NEW;
/* set bitmap state based on bmp state */
bitmap_state |= (bmp_state & BMP_OPAQUE) ? BITMAP_OPAQUE : 0;
bitmap_state |= (bmp_state & BMP_CLEAR_MEMORY) ?
BITMAP_CLEAR_MEMORY : 0;
/* return the created bitmap */
return bitmap_create(width, height, bitmap_state);
}
/* The Bitmap callbacks function table;
* necessary for interaction with nsbmplib.
*/
bmp_bitmap_callback_vt bmp_bitmap_callbacks = {
.bitmap_create = nsbmp_bitmap_create,
.bitmap_destroy = bitmap_destroy,
.bitmap_set_suspendable = bitmap_set_suspendable,
.bitmap_get_buffer = bitmap_get_buffer,
.bitmap_get_bpp = bitmap_get_bpp
};
static bool nsbmp_convert(struct content *c)
{
nsbmp_content *bmp = (nsbmp_content *) c;
bmp_result res;
union content_msg_data msg_data;
uint32_t swidth;
const char *data;
unsigned long size;
char title[100];
/* set the bmp data */
data = content__get_source_data(c, &size);
/* analyse the BMP */
res = bmp_analyse(bmp->bmp, size, (unsigned char *) data);
switch (res) {
case BMP_OK:
break;
case BMP_INSUFFICIENT_MEMORY:
msg_data.error = messages_get("NoMemory");
content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
return false;
case BMP_INSUFFICIENT_DATA:
case BMP_DATA_ERROR:
msg_data.error = messages_get("BadBMP");
content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
return false;
}
/* Store our content width and description */
c->width = bmp->bmp->width;
c->height = bmp->bmp->height;
LOG(("BMP width %u height %u", c->width, c->height));
snprintf(title, sizeof(title), messages_get("BMPTitle"),
c->width, c->height, size);
content__set_title(c, title);
swidth = bmp->bmp->bitmap_callbacks.bitmap_get_bpp(bmp->bmp->bitmap) *
bmp->bmp->width;
c->size += (swidth * bmp->bmp->height) + 16 + 44;
/* exit as a success */
bmp->bitmap = bmp->bmp->bitmap;
bitmap_modified(bmp->bitmap);
content_set_ready(c);
content_set_done(c);
/* Done: update status bar */
content_set_status(c, "");
return true;
}
static bool nsbmp_redraw(struct content *c, struct content_redraw_data *data,
const struct rect *clip, const struct redraw_context *ctx)
{
nsbmp_content *bmp = (nsbmp_content *) c;
bitmap_flags_t flags = BITMAPF_NONE;
if (bmp->bmp->decoded == false)
if (bmp_decode(bmp->bmp) != BMP_OK)
return false;
bmp->bitmap = bmp->bmp->bitmap;
if (data->repeat_x)
flags |= BITMAPF_REPEAT_X;
if (data->repeat_y)
flags |= BITMAPF_REPEAT_Y;
return ctx->plot->bitmap(data->x, data->y, data->width, data->height,
bmp->bitmap, data->background_colour, flags);
}
static void nsbmp_destroy(struct content *c)
{
nsbmp_content *bmp = (nsbmp_content *) c;
bmp_finalise(bmp->bmp);
free(bmp->bmp);
}
static nserror nsbmp_clone(const struct content *old, struct content **newc)
{
nsbmp_content *new_bmp;
nserror error;
new_bmp = talloc_zero(0, nsbmp_content);
if (new_bmp == NULL)
return NSERROR_NOMEM;
error = content__clone(old, &new_bmp->base);
if (error != NSERROR_OK) {
content_destroy(&new_bmp->base);
return error;
}
/* We "clone" the old content by replaying creation and conversion */
error = nsbmp_create_bmp_data(new_bmp);
if (error != NSERROR_OK) {
content_destroy(&new_bmp->base);
return error;
}
if (old->status == CONTENT_STATUS_READY ||
old->status == CONTENT_STATUS_DONE) {
if (nsbmp_convert(&new_bmp->base) == false) {
content_destroy(&new_bmp->base);
return NSERROR_CLONE_FAILED;
}
}
*newc = (struct content *) new_bmp;
return NSERROR_OK;
}
static void *nsbmp_get_internal(const struct content *c, void *context)
{
nsbmp_content *bmp = (nsbmp_content *)c;
return bmp->bitmap;
}
static content_type nsbmp_content_type(void)
{
return CONTENT_IMAGE;
}
static const content_handler nsbmp_content_handler = {
.create = nsbmp_create,
.data_complete = nsbmp_convert,
.destroy = nsbmp_destroy,
.redraw = nsbmp_redraw,
.clone = nsbmp_clone,
.get_internal = nsbmp_get_internal,
.type = nsbmp_content_type,
.no_share = false,
};
static const char *nsbmp_types[] = {
"application/bmp",
"application/preview",
"application/x-bmp",
"application/x-win-bitmap",
"image/bmp",
"image/ms-bmp",
"image/x-bitmap",
"image/x-bmp",
"image/x-ms-bmp",
"image/x-win-bitmap",
"image/x-windows-bmp",
"image/x-xbitmap"
};
CONTENT_FACTORY_REGISTER_TYPES(nsbmp, nsbmp_types, nsbmp_content_handler);