netsurf/image/nssprite.c

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/*
* Copyright 2008 James Shaw <js102@zepler.net>
*
* 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 (librosprite implementation).
*
*/
#include "utils/config.h"
#ifdef WITH_NSSPRITE
#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include <librosprite.h>
#include "utils/config.h"
#include "desktop/plotters.h"
#include "image/bitmap.h"
#include "content/content_protected.h"
#include "utils/log.h"
#include "utils/messages.h"
#include "utils/utils.h"
#define ERRCHK(x) do { \
rosprite_error err = x; \
if (err == ROSPRITE_EOF) { \
LOG(("Got ROSPRITE_EOF when loading sprite file")); \
return false; \
} else if (err == ROSPRITE_BADMODE) { \
LOG(("Got ROSPRITE_BADMODE when loading sprite file")); \
return false; \
} else if (err == ROSPRITE_OK) { \
} else { \
return false; \
} \
} while(0)
/**
* Convert a CONTENT_SPRITE for display.
*
* No conversion is necessary. We merely read the sprite dimensions.
*/
bool nssprite_convert(struct content *c)
{
union content_msg_data msg_data;
struct rosprite_mem_context* ctx;
const char *data;
unsigned long size;
data = content__get_source_data(c, &size);
ERRCHK(rosprite_create_mem_context((uint8_t *) data, size, &ctx));
struct rosprite_area* sprite_area;
ERRCHK(rosprite_load(rosprite_mem_reader, ctx, &sprite_area));
rosprite_destroy_mem_context(ctx);
c->data.nssprite.sprite_area = sprite_area;
assert(sprite_area->sprite_count > 0);
struct rosprite* sprite = sprite_area->sprites[0];
c->bitmap = bitmap_create(sprite->width, sprite->height, BITMAP_NEW);
if (!c->bitmap) {
msg_data.error = messages_get("NoMemory");
content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
return false;
}
unsigned char* imagebuf = bitmap_get_buffer(c->bitmap);
if (!imagebuf) {
msg_data.error = messages_get("NoMemory");
content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
return false;
}
unsigned int row_width = bitmap_get_rowstride(c->bitmap);
memcpy(imagebuf, sprite->image, row_width * sprite->height); // TODO: avoid copying entire image buffer
/* reverse byte order of each word */
for (uint32_t y = 0; y < sprite->height; y++) {
for (uint32_t x = 0; x < sprite->width; x++) {
int offset = 4 * (y * sprite->width + x);
uint32_t r = imagebuf[offset+3];
uint32_t g = imagebuf[offset+2];
uint32_t b = imagebuf[offset+1];
uint32_t a = imagebuf[offset];
imagebuf[offset] = r;
imagebuf[offset+1] = g;
imagebuf[offset+2] = b;
imagebuf[offset+3] = a;
}
}
c->width = sprite->width;
c->height = sprite->height;
bitmap_modified(c->bitmap);
c->status = CONTENT_STATUS_DONE;
return true;
}
/**
* Destroy a CONTENT_SPRITE and free all resources it owns.
*/
void nssprite_destroy(struct content *c)
{
if (c->data.nssprite.sprite_area != NULL)
rosprite_destroy_sprite_area(c->data.nssprite.sprite_area);
if (c->bitmap != NULL)
bitmap_destroy(c->bitmap);
}
/**
* Redraw a CONTENT_SPRITE.
*/
bool nssprite_redraw(struct content *c, int x, int y,
int width, int height, const struct rect *clip,
float scale, colour background_colour)
{
return plot.bitmap(x, y, width, height,
c->bitmap, background_colour, BITMAPF_NONE);
}
bool nssprite_clone(const struct content *old, struct content *new_content)
{
/* Simply replay convert */
if (old->status == CONTENT_STATUS_READY ||
old->status == CONTENT_STATUS_DONE) {
if (nssprite_convert(new_content) == false)
return false;
}
return true;
}
#endif