netsurf/image/bmp.c

204 lines
5.2 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 "utils/config.h"
#ifdef WITH_BMP
#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 "desktop/plotters.h"
#include "image/bitmap.h"
#include "image/bmp.h"
#include "utils/log.h"
#include "utils/messages.h"
#include "utils/utils.h"
/* 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
};
bool nsbmp_create(struct content *c, const struct http_parameter *params)
{
union content_msg_data msg_data;
c->data.bmp.bmp = calloc(sizeof(struct bmp_image), 1);
if (!c->data.bmp.bmp) {
msg_data.error = messages_get("NoMemory");
content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
return false;
}
bmp_create(c->data.bmp.bmp, &bmp_bitmap_callbacks);
return true;
}
bool nsbmp_convert(struct content *c)
{
bmp_result res;
bmp_image *bmp;
union content_msg_data msg_data;
uint32_t swidth;
const char *data;
unsigned long size;
char title[100];
/* set the bmp data */
bmp = c->data.bmp.bmp;
data = content__get_source_data(c, &size);
/* analyse the BMP */
res = bmp_analyse(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->width;
c->height = 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->bitmap_callbacks.bitmap_get_bpp(bmp->bitmap) * bmp->width;
c->size += (swidth * bmp->height) + 16 + 44;
/* exit as a success */
c->bitmap = bmp->bitmap;
bitmap_modified(c->bitmap);
c->status = CONTENT_STATUS_DONE;
/* Done: update status bar */
content_set_status(c, "");
return true;
}
bool nsbmp_redraw(struct content *c, int x, int y,
int width, int height,
int clip_x0, int clip_y0, int clip_x1, int clip_y1,
float scale, colour background_colour)
{
if (!c->data.bmp.bmp->decoded)
if (bmp_decode(c->data.bmp.bmp) != BMP_OK)
return false;
c->bitmap = c->data.bmp.bmp->bitmap;
return plot.bitmap(x, y, width, height, c->bitmap,
background_colour, BITMAPF_NONE);
}
bool nsbmp_redraw_tiled(struct content *c, int x, int y,
int width, int height,
int clip_x0, int clip_y0, int clip_x1, int clip_y1,
float scale, colour background_colour,
bool repeat_x, bool repeat_y)
{
bitmap_flags_t flags = BITMAPF_NONE;
if (!c->data.bmp.bmp->decoded)
if (bmp_decode(c->data.bmp.bmp) != BMP_OK)
return false;
c->bitmap = c->data.bmp.bmp->bitmap;
if (repeat_x)
flags |= BITMAPF_REPEAT_X;
if (repeat_y)
flags |= BITMAPF_REPEAT_Y;
return plot.bitmap(x, y, width, height, c->bitmap,
background_colour, flags);
}
void nsbmp_destroy(struct content *c)
{
bmp_finalise(c->data.bmp.bmp);
free(c->data.bmp.bmp);
}
bool nsbmp_clone(const struct content *old, struct content *new_content)
{
/* We "clone" the old content by replaying creation and conversion */
if (nsbmp_create(new_content, NULL) == false)
return false;
if (old->status == CONTENT_STATUS_READY ||
old->status == CONTENT_STATUS_DONE) {
if (nsbmp_convert(new_content) == false)
return false;
}
return true;
}
/**
* 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
*/
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);
}
#endif