netsurf/riscos/gif.c

230 lines
5.9 KiB
C

/*
* This file is part of NetSurf, http://netsurf.sourceforge.net/
* Licensed under the GNU General Public License,
* http://www.opensource.org/licenses/gpl-license
* Copyright 2003 John M Bell <jmb202@ecs.soton.ac.uk>
* Parts modified from IGviewer source by Peter Hartley
* http://utter.chaos.org/~pdh/software/intergif.htm
*/
#include <assert.h>
#include <string.h>
#include <stdbool.h>
#include <stdlib.h>
#include "animlib/animlib.h"
#include "oslib/colourtrans.h"
#include "oslib/os.h"
#include "oslib/osspriteop.h"
#include "netsurf/utils/config.h"
#include "netsurf/content/content.h"
#include "netsurf/riscos/gif.h"
#include "netsurf/utils/log.h"
#include "netsurf/utils/messages.h"
#include "netsurf/utils/utils.h"
#ifdef WITH_GIF
static osspriteop_area *create_buffer_sprite(struct content *c, anim a);
void nsgif_init(void)
{
}
void nsgif_create(struct content *c, const char *params[])
{
c->data.gif.sprite_area = 0;
c->data.gif.data = xcalloc(0, 1);
c->data.gif.length = 0;
c->data.gif.buffer_pos = 0;
}
void nsgif_process_data(struct content *c, char *data, unsigned long size)
{
c->data.gif.data = xrealloc(c->data.gif.data, c->data.gif.length + size);
memcpy(c->data.gif.data + c->data.gif.length, data, size);
c->data.gif.length += size;
c->size += size;
}
int nsgif_convert(struct content *c, unsigned int iwidth, unsigned int iheight)
{
anim a;
frame f;
pixel *img, *mask;
struct osspriteop_header *header;
struct osspriteop_area *area;
a = Anim_FromData(c->data.gif.data, c->data.gif.length, NULL, false, false, false);
if (!a) {
LOG(("Error creating anim object"));
return 1;
}
if(!Anim_CommonPalette(a)) {
LOG(("bad palette"));
Anim_Destroy(&a);
return 1;
}
area = create_buffer_sprite(c, a);
if(!area) {
LOG(("Failed to create sprite"));
Anim_Destroy(&a);
return 1;
}
c->data.gif.sprite_area = area;
header = (osspriteop_header*)((char*)c->data.gif.sprite_area +
c->data.gif.sprite_area->first);
f = a->pFrames + 0;
img = (pixel*)header + header->image;
mask = (pixel*)header + header->mask;
if (!Anim_DecompressAligned(f->pImageData, f->nImageSize,
a->nWidth, a->nHeight, img)) {
LOG(("Anim_DecompressAligned image failed"));
Anim_Destroy(&a);
xfree(area);
return 1;
}
if(f->pMaskData) {
int i,n = header->mask - header->image;
if (!Anim_DecompressAligned(f->pMaskData, f->nMaskSize,
a->nWidth, a->nHeight, mask)) {
LOG(("Anim_DecompressAligned mask failed"));
Anim_Destroy(&a);
xfree(area);
return 1;
}
for(i=0; i<n; i++)
if(!mask[i]) {
img[i] = 255;
mask[i] = 0;
}
}
else
memset(mask, 255, (unsigned int)(header->mask - header->image));
c->title = xcalloc(100, sizeof(char));
sprintf(c->title, messages_get("GIFTitle"), c->width, c->height);
c->status = CONTENT_STATUS_DONE;
/* xosspriteop_save_sprite_file(osspriteop_USER_AREA,
c->data.gif.sprite_area, "gif"); */
return 0;
}
void nsgif_revive(struct content *c, unsigned int width, unsigned int height)
{
}
void nsgif_reformat(struct content *c, unsigned int width, unsigned int height)
{
}
void nsgif_redraw(struct content *c, long x, long y,
unsigned long width, unsigned long height,
long clip_x0, long clip_y0, long clip_x1, long clip_y1,
float scale)
{
unsigned int size;
osspriteop_trans_tab *table;
os_factors factors;
xcolourtrans_generate_table_for_sprite(c->data.gif.sprite_area,
(osspriteop_id) ((char*)c->data.gif.sprite_area +
c->data.gif.sprite_area->first),
colourtrans_CURRENT_MODE, colourtrans_CURRENT_PALETTE,
0, colourtrans_GIVEN_SPRITE, 0, 0, &size);
table = xcalloc(size, 1);
xcolourtrans_generate_table_for_sprite(c->data.gif.sprite_area,
(osspriteop_id) ((char*)c->data.gif.sprite_area +
c->data.gif.sprite_area->first),
colourtrans_CURRENT_MODE, colourtrans_CURRENT_PALETTE,
table, colourtrans_GIVEN_SPRITE, 0, 0, 0);
factors.xmul = width;
factors.ymul = height;
factors.xdiv = c->width * 2;
factors.ydiv = c->height * 2;
xosspriteop_put_sprite_scaled(osspriteop_PTR,
c->data.gif.sprite_area,
(osspriteop_id) ((char*)c->data.gif.sprite_area +
c->data.gif.sprite_area->first),
x, (int)(y - height),
/* osspriteop_USE_PALETTE is RO 3.5+ only.
* behaviour on RO < 3.5 is unknown...
*/
(osspriteop_action)(osspriteop_USE_MASK |
osspriteop_USE_PALETTE),
&factors, table);
xfree(table);
}
void nsgif_destroy(struct content *c)
{
xfree(c->title);
xfree(c->data.gif.sprite_area);
xfree(c->data.gif.data);
}
static osspriteop_area *create_buffer_sprite( struct content *c, anim a )
{
unsigned int abw = ((a->nWidth + 3 ) & ~3u) * a->nHeight;
unsigned int nBytes = abw*2 + 44 + 16 + 256*8;
struct osspriteop_area *result = xcalloc(1, nBytes);
struct osspriteop_header *spr = (osspriteop_header*)(result+1);
int i,n;
unsigned int *pPalDest = (unsigned int*)(spr+1);
unsigned int *pPalSrc;
if ( !result )
return NULL;
result->size = nBytes;
result->sprite_count = 1;
result->first = sizeof(*result);
result->used = nBytes;
spr->size = nBytes-sizeof(*result);
strncpy( spr->name, "gif", 12 );
spr->width = ((a->nWidth+3)>>2)-1;
spr->height = a->nHeight-1;
spr->left_bit = 0;
spr->right_bit = ((a->nWidth & 3) * 8 - 1) & 31;
spr->image = sizeof(*spr) + 256*8;
spr->mask = sizeof(*spr) + 256*8 + abw;
spr->mode = os_MODE8BPP90X90; /* 28 */
c->data.gif.sprite_image = ((char*)spr) + spr->image;
c->width = a->nWidth;
c->height = a->nHeight;
n = a->pFrames->pal->nColours;
pPalSrc = a->pFrames->pal->pColours;
for ( i=0; i<n; i++ )
{
*pPalDest++ = *pPalSrc;
*pPalDest++ = *pPalSrc++;
}
return result;
}
#endif