C++ (Cpp) de_read_palette_rgb Examples

Example #1

File: png.c Project: jsummers/deark

static void handler_PLTE(deark *c, lctx *d, struct handler_params *hp)
{
	// pal is a dummy variable, since we don't need to keep the palette.
	// TODO: Maybe de_read_palette_rgb shouldn't require the palette to be returned.
	u32 pal[256];
	i64 nentries;

	nentries = hp->dlen/3;
	de_dbg(c, "num palette entries: %d", (int)nentries);
	de_read_palette_rgb(c->infile, hp->dpos, nentries, 3, pal, DE_ITEMS_IN_ARRAY(pal), 0);
}

Example #2

File: alphabmp.c Project: jsummers/deark

static int do_read_palette(deark *c, lctx *d, i64 pos, i64 *pal_nbytes)
{
	de_dbg(c, "palette at %d", (int)pos);
	de_dbg_indent(c, 1);

	d->num_pal_entries = de_getu16le(pos) + 1;
	de_dbg(c, "number of palette colors: %d", (int)d->num_pal_entries);
	if(d->palette_is_hls)
		*pal_nbytes = 2 + d->num_pal_entries * 6;
	else
		*pal_nbytes = 2 + d->num_pal_entries * 3;
	if(d->palette_is_hls) goto done;

	de_read_palette_rgb(c->infile, pos+2, d->num_pal_entries, 3, d->pal, 256, 0);
done:
	de_dbg_indent(c, -1);
	return 1;
}

Example #3

static void do_read_palette(deark *c, lctx *d)
{
	de_int64 pal_size_in_bytes;

	if(d->pal_entries<1) return;

	pal_size_in_bytes = d->pal_entries*d->bytes_per_pal_entry;
	if(d->pal_pos+pal_size_in_bytes > d->bits_offset) {
		de_warn(c, "Palette at %d (size %d) overlaps bitmap at %d\n",
			(int)d->pal_pos, (int)pal_size_in_bytes, (int)d->bits_offset);
		if(d->version==DE_BMPVER_OS2V2) {
			do_os2v2_bad_palette(c, d);
		}
	}

	de_dbg(c, "color table at %d, %d entries\n", (int)d->pal_pos, (int)d->pal_entries);

	de_dbg_indent(c, 1);
	de_read_palette_rgb(c->infile, d->pal_pos, d->pal_entries, d->bytes_per_pal_entry,
		d->pal, 256, DE_GETRGBFLAG_BGR);

	d->pal_is_grayscale = de_is_grayscale_palette(d->pal, d->pal_entries);
	de_dbg_indent(c, -1);
}