// Rasterized caption
static void handle_2_125(deark *c, lctx *d, const struct ds_info *dsi,
de_int64 pos, de_int64 len)
{
dbuf *unc_pixels = NULL;
struct deark_bitmap *img = NULL;
de_int64 i, j;
de_byte b;
de_int64 rowspan;
de_int64 width, height;
// I can't find any examples of this field, so this may not be correct.
// The format seems to be well-documented, though the pixels are in an
// unusual order.
unc_pixels = dbuf_open_input_subfile(c->infile, pos, len);
width = 460;
height = 128;
img = de_bitmap_create(c, width, height, 1);
rowspan = height/8;
for(j=0; j<width; j++) {
for(i=0; i<height; i++) {
b = de_get_bits_symbol(unc_pixels, 1, rowspan*j, i);
de_bitmap_setpixel_gray(img, j, (height-1-i), b?0:255);
}
}
de_bitmap_write_to_file(img, "caption", DE_CREATEFLAG_IS_AUX);
de_bitmap_destroy(img);
dbuf_close(unc_pixels);
}
static void do_bitmap(deark *c, lctx *d, dbuf *unc_pixels)
{
i64 i, j;
i64 rowspan;
u32 clr;
de_bitmap *img = NULL;
u8 b;
rowspan = (d->w * d->bpp +7)/8;
img = de_bitmap_create(c, d->w, d->h, 3);
for(j=0; j<d->h; j++) {
for(i=0; i<d->w; i++) {
if(d->bpp<=8) {
b = de_get_bits_symbol(unc_pixels, d->bpp, j*rowspan, i);
clr = d->pal[(unsigned int)b];
}
else {
clr = dbuf_getRGB(unc_pixels, j*rowspan + i*3, 0);
}
de_bitmap_setpixel_rgb(img, i, j, clr);
}
}
de_bitmap_write_to_file(img, NULL, 0);
de_bitmap_destroy(img);
}
// Some MacPaint files contain a collection of brush patterns.
// Essentially, MacPaint saves workspace settings inside image files.
// (But these patterns are the only setting.)
static void do_read_patterns(deark *c, lctx *d, de_int64 pos)
{
de_int64 cell;
de_int64 i, j;
de_byte x;
const de_int64 dispwidth = 19;
const de_int64 dispheight = 17;
de_int64 xpos, ypos;
int is_blank;
struct deark_bitmap *pat = NULL;
de_uint32 patcrc;
const char *patsetname;
pos += 4;
patcrc = x_dbuf_crc32(c->infile, pos, 38*8);
patsetname = get_pattern_set_info(patcrc, &is_blank);
de_dbg(c, "brush patterns crc: 0x%08x (%s)\n", (unsigned int)patcrc, patsetname);
if(c->extract_level<2) {
goto done;
}
if(is_blank) {
de_dbg(c, "brush patterns are blank: not extracting\n");
goto done;
}
pat = de_bitmap_create(c, (dispwidth+1)*19+1, (dispheight+1)*2+1, 1);
for(cell=0; cell<38; cell++) {
xpos = (dispwidth+1)*(cell%19)+1;
ypos = (dispheight+1)*(cell/19)+1;
for(j=0; j<dispheight; j++) {
for(i=0; i<dispwidth; i++) {
// TODO: Figure out the proper "brush origin" of these patterns.
// Some of them may be shifted differently than MacPaint displays them.
x = de_get_bits_symbol(c->infile, 1, pos+cell*8+j%8, i%8);
// 0 = white. Only need to set the white pixels, since they start out
// black.
if(x==0) {
de_bitmap_setpixel_gray(pat, xpos+i, ypos+j, 255);
}
}
}
}
de_bitmap_write_to_file(pat, "pat", DE_CREATEFLAG_IS_AUX);
done:
de_bitmap_destroy(pat);
}
static void do_decode_1_4_8bit(deark *c, lctx *d, struct page_ctx *pg)
{
struct deark_bitmap *img = NULL;
de_int64 i, j;
de_byte a, b;
de_byte x;
de_int32 fgcol;
img = de_bitmap_create(c, pg->type_info->width, pg->type_info->height, 4);
for(j=0; j<pg->type_info->height; j++) {
for(i=0; i<pg->type_info->width; i++) {
// Foreground
b = de_get_bits_symbol(c->infile, pg->type_info->bpp, pg->image_pos + pg->rowspan*j, i);
if(pg->type_info->bpp==8) {
fgcol = getpal256((int)b);
}
else if(pg->type_info->bpp==4) {
fgcol = pal16[(unsigned int)b];
}
else {
fgcol = b ? 0x0000000 : 0xffffff;
}
// Opacity
if(pg->mask_pos) {
x = de_get_bits_symbol(c->infile, 1, pg->mask_pos + pg->mask_rowspan*j, i);
a = x ? 0xff : 0x00;
}
else {
a = 0xff;
}
de_bitmap_setpixel_rgba(img, i, j, DE_SET_ALPHA(fgcol, a));
}
}
de_bitmap_write_to_file(img, pg->filename_token, 0);
de_bitmap_destroy(img);
}
static void read_paletted_image(deark *c, lctx *d, dbuf *unc_pixels, de_bitmap *img)
{
i64 i, j, plane;
unsigned int n;
u8 x;
if(d->nplanes<1 || d->nplanes>8) return;
for(j=0; j<d->h; j++) {
for(i=0; i<d->w; i++) {
n = 0;
for(plane=0; plane<d->nplanes; plane++) {
x = de_get_bits_symbol(unc_pixels, 1, j*d->rowspan_total + plane*d->rowspan_per_plane, i);
if(x) n |= 1<<plane;
}
de_bitmap_setpixel_rgb(img, i, j, d->pal[n]);
}
}
}
