// 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 int do_image_pbm_ascii(deark *c, lctx *d, struct page_ctx *pg, de_int64 pos1)
{
struct deark_bitmap *img = NULL;
de_int64 xpos, ypos;
de_int64 pos = pos1;
de_byte b;
de_byte v;
img = de_bitmap_create(c, pg->width, pg->height, 1);
xpos=0; ypos=0;
while(1) {
if(pos >= c->infile->len) break; // end of file
if(ypos==(pg->height-1) && xpos>=pg->width) break; // end of image
if(ypos>=pg->height) break;
b = de_getbyte(pos++);
if(b=='1') v=0;
else if(b=='0') v=255;
else continue;
de_bitmap_setpixel_gray(img, xpos, ypos, v);
xpos++;
if(xpos>=pg->width) {
ypos++;
xpos=0;
}
}
de_bitmap_write_to_file_finfo(img, NULL, 0);
de_bitmap_destroy(img);
return 1;
}
// 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 int do_image_pgm_ppm_binary(deark *c, lctx *d, struct page_ctx *pg, de_int64 pos1)
{
struct deark_bitmap *img = NULL;
de_int64 rowspan;
de_int64 nsamples; // For both input and output
de_int64 bytes_per_sample;
de_int64 i, j, k;
de_int64 pos = pos1;
unsigned int samp_ori[3];
de_byte samp_adj[3];
if(fmt_is_ppm(pg->fmt)) nsamples=3;
else nsamples=1;
if(pg->maxval<=255) bytes_per_sample=1;
else bytes_per_sample=2;
rowspan = pg->width * nsamples * bytes_per_sample;
pg->image_data_len = rowspan * pg->height;
img = de_bitmap_create(c, pg->width, pg->height, (int)nsamples);
for(j=0; j<pg->height; j++) {
for(i=0; i<pg->width; i++) {
for(k=0; k<nsamples; k++) {
if(bytes_per_sample==1) {
samp_ori[k] = de_getbyte(pos++);
}
else {
samp_ori[k] = (unsigned int)de_getbyte(pos++) << 8 ;
samp_ori[k] |= (unsigned int)de_getbyte(pos++);
}
samp_adj[k] = de_scale_n_to_255(pg->maxval, samp_ori[k]);
}
if(nsamples==1) {
de_bitmap_setpixel_gray(img, i, j, samp_adj[0]);
}
else {
de_uint32 clr;
clr = DE_MAKE_RGB(samp_adj[0], samp_adj[1], samp_adj[2]);
de_bitmap_setpixel_rgb(img, i, j, clr);
}
}
}
de_bitmap_write_to_file(img, NULL, 0);
de_bitmap_destroy(img);
return 1;
}
static void do_decode_image_default(deark *c, lctx *d, struct tgaimginfo *imginfo, dbuf *unc_pixels,
de_finfo *fi, unsigned int createflags)
{
de_bitmap *img = NULL;
i64 i, j;
u8 b;
u32 clr;
u8 a;
i64 rowspan;
int output_bypp;
unsigned int getrgbflags;
i64 interleave_stride;
i64 interleave_pass;
i64 cur_rownum; // 0-based, does not account for bottom-up orientation
if(d->pixel_depth==1) {
de_warn(c, "1-bit TGA images are not portable, and may not be decoded correctly");
rowspan = (imginfo->width+7)/8;
}
else {
rowspan = imginfo->width*d->bytes_per_pixel;
}
if(d->color_type==TGA_CLRTYPE_GRAYSCALE || d->pixel_depth==1)
output_bypp=1;
else
output_bypp=3;
if(d->has_alpha_channel)
output_bypp++;
if(d->file_format==FMT_VST)
getrgbflags = 0;
else
getrgbflags = DE_GETRGBFLAG_BGR;
img = de_bitmap_create(c, imginfo->width, imginfo->height, output_bypp);
switch(d->interleave_mode) {
case 1: interleave_stride = 2; break;
case 2: interleave_stride = 4; break;
default: interleave_stride = 1;
}
cur_rownum = 0;
interleave_pass = 0;
for(j=0; j<imginfo->height; j++) {
i64 j_adj;
if(d->top_down)
j_adj = cur_rownum;
else
j_adj = imginfo->height-1-cur_rownum;
// Update the row number for next time
cur_rownum += interleave_stride;
if(cur_rownum >= imginfo->height) {
// Went past the end of the image; move back to near the start.
interleave_pass++;
cur_rownum = interleave_pass;
}
for(i=0; i<imginfo->width; i++) {
i64 i_adj;
if(d->right_to_left)
i_adj = imginfo->width-1-i;
else
i_adj = i;
if(d->pixel_depth==1) {
de_convert_row_bilevel(unc_pixels, j*rowspan, img, j_adj, 0);
}
else if(d->color_type==TGA_CLRTYPE_TRUECOLOR && (d->pixel_depth==15 || d->pixel_depth==16)) {
clr = (u32)dbuf_getu16le(unc_pixels, j*rowspan + i*d->bytes_per_pixel);
clr = de_rgb555_to_888(clr);
de_bitmap_setpixel_rgb(img, i_adj, j_adj, clr);
}
else if(d->color_type==TGA_CLRTYPE_TRUECOLOR) {
clr = dbuf_getRGB(unc_pixels, j*rowspan + i*d->bytes_per_pixel, getrgbflags);
if(d->has_alpha_channel) {
a = dbuf_getbyte(unc_pixels, j*rowspan + i*d->bytes_per_pixel+3);
de_bitmap_setpixel_rgba(img, i_adj, j_adj, DE_SET_ALPHA(clr, a));
}
else {
de_bitmap_setpixel_rgb(img, i_adj, j_adj, clr);
}
}
else if(d->color_type==TGA_CLRTYPE_GRAYSCALE) {
b = dbuf_getbyte(unc_pixels, j*rowspan + i*d->bytes_per_pixel);
de_bitmap_setpixel_gray(img, i_adj, j_adj, b);
}
else if(d->color_type==TGA_CLRTYPE_PALETTE) {
b = dbuf_getbyte(unc_pixels, j*rowspan + i*d->bytes_per_pixel);
de_bitmap_setpixel_rgb(img, i_adj, j_adj, d->pal[(unsigned int)b]);
}
}
}
de_bitmap_write_to_file_finfo(img, fi, createflags);
de_bitmap_destroy(img);
}
void de_font_bitmap_font_to_image(deark *c, struct de_bitmap_font *font1, de_finfo *fi,
unsigned int createflags)
{
struct font_render_ctx *fctx = NULL;
i64 i, j, k;
de_bitmap *img = NULL;
i64 xpos, ypos;
i64 img_leftmargin, img_topmargin;
i64 img_rightmargin, img_bottommargin;
i64 img_vpixelsperchar;
i64 img_width, img_height;
i64 num_table_rows_to_display;
i64 num_table_rows_total;
i64 last_valid_row;
struct de_bitmap_font *dfont = NULL;
i64 chars_per_row = 32;
const char *s;
struct row_info_struct *row_info = NULL;
struct col_info_struct *col_info = NULL;
int unicode_req = 0;
i64 label_stride;
i64 rownum, colnum;
i64 curpos;
unsigned int dnflags;
fctx = de_malloc(c, sizeof(struct font_render_ctx));
fctx->font = font1;
if(fctx->font->num_chars<1) goto done;
if(fctx->font->num_chars>17*65536) goto done;
if(fctx->font->nominal_width>512 || fctx->font->nominal_height>512) {
de_err(c, "Font size too big (%d"DE_CHAR_TIMES"%d). Not supported.",
(int)fctx->font->nominal_width, (int)fctx->font->nominal_height);
goto done;
}
// -1 = "no preference"
unicode_req = de_get_ext_option_bool(c, "font:tounicode", -1);
if(unicode_req==0 &&
(fctx->font->has_nonunicode_codepoints || !fctx->font->has_unicode_codepoints))
{
; // Render as nonunicode.
}
else if(fctx->font->has_unicode_codepoints &&
(unicode_req>0 || fctx->font->prefer_unicode || !fctx->font->has_nonunicode_codepoints))
{
fctx->render_as_unicode = 1;
}
s = de_get_ext_option(c, "font:charsperrow");
if(s) {
chars_per_row = de_atoi64(s);
if(chars_per_row<1) chars_per_row=1;
}
dfont = make_digit_font(c);
fctx->codepoint_tmp = de_mallocarray(c, fctx->font->num_chars, sizeof(i32));
fixup_codepoints(c, fctx);
get_min_max_codepoint(fctx);
if(fctx->num_valid_chars<1) goto done;
num_table_rows_total = fctx->max_codepoint/chars_per_row+1;
// TODO: Clean up these margin calculations, and make it more general.
if(fctx->render_as_unicode) {
img_leftmargin = dfont->nominal_width * 5 + 6;
}
else {
if(fctx->max_codepoint >= 1000)
img_leftmargin = dfont->nominal_width * 5 + 6;
else
img_leftmargin = dfont->nominal_width * 3 + 6;
}
img_topmargin = dfont->nominal_height + 6;
img_rightmargin = 1;
img_bottommargin = 1;
// Scan the characters, and record relevant information.
row_info = de_mallocarray(c, num_table_rows_total, sizeof(struct row_info_struct));
col_info = de_mallocarray(c, chars_per_row, sizeof(struct col_info_struct));
for(i=0; i<chars_per_row; i++) {
#define MIN_CHAR_CELL_WIDTH 5
col_info[i].display_width = MIN_CHAR_CELL_WIDTH;
}
for(k=0; k<fctx->font->num_chars; k++) {
i64 char_display_width;
if(fctx->codepoint_tmp[k] == DE_CODEPOINT_INVALID) continue;
if(!is_valid_char(&fctx->font->char_array[k])) continue;
rownum = fctx->codepoint_tmp[k] / chars_per_row;
colnum = fctx->codepoint_tmp[k] % chars_per_row;
if(rownum<0 || rownum>=num_table_rows_total) {
de_err(c, "internal: bad rownum");
de_fatalerror(c);
}
// Remember that there is at least one valid character in this character's row.
row_info[rownum].is_visible = 1;
// Track the maximum width of any character in this character's column.
char_display_width = (i64)(fctx->font->char_array[k].width +
(int)fctx->font->char_array[k].extraspace_l +
(int)fctx->font->char_array[k].extraspace_r);
if(char_display_width > col_info[colnum].display_width) {
col_info[colnum].display_width = char_display_width;
}
}
img_vpixelsperchar = fctx->font->nominal_height + 1;
// Figure out how many rows are used, and where to draw them.
num_table_rows_to_display = 0;
last_valid_row = -1;
curpos = img_topmargin;
for(j=0; j<num_table_rows_total; j++) {
if(!row_info[j].is_visible) continue;
// If we skipped one or more rows, leave some extra vertical space.
if(num_table_rows_to_display>0 && !row_info[j-1].is_visible) curpos+=3;
last_valid_row = j;
row_info[j].display_pos = curpos;
curpos += img_vpixelsperchar;
num_table_rows_to_display++;
}
if(num_table_rows_to_display<1) goto done;
// Figure out the positions of the columns.
curpos = img_leftmargin;
for(i=0; i<chars_per_row; i++) {
col_info[i].display_pos = curpos;
curpos += col_info[i].display_width + 1;
}
img_width = col_info[chars_per_row-1].display_pos +
col_info[chars_per_row-1].display_width + img_rightmargin;
img_height = row_info[last_valid_row].display_pos +
img_vpixelsperchar -1 + img_bottommargin;
img = de_bitmap_create(c, img_width, img_height, 1);
// Clear the image
for(j=0; j<img->height; j++) {
for(i=0; i<img->width; i++) {
de_bitmap_setpixel_gray(img, i, j, 128);
}
}
// Draw/clear the cell backgrounds
for(j=0; j<num_table_rows_total; j++) {
if(!row_info[j].is_visible) continue;
ypos = row_info[j].display_pos;
for(i=0; i<chars_per_row; i++) {
i64 ii, jj;
xpos = col_info[i].display_pos;
for(jj=0; jj<img_vpixelsperchar-1; jj++) {
for(ii=0; ii<col_info[i].display_width; ii++) {
de_bitmap_setpixel_gray(img, xpos+ii, ypos+jj, (ii/2+jj/2)%2 ? 176 : 192);
}
}
}
}
// Draw the labels in the top margin.
// TODO: Better label spacing logic.
if(fctx->font->nominal_width <= 12)
label_stride = 2;
else
label_stride = 1;
for(i=0; i<chars_per_row; i++) {
if(i%label_stride != 0) continue;
xpos = col_info[i].display_pos + col_info[i].display_width/2;
ypos = img_topmargin - 3;
dnflags = DNFLAG_HCENTER;
if(fctx->render_as_unicode) dnflags |= DNFLAG_HEX;
draw_number(c, img, dfont, i, xpos, ypos, dnflags);
}
// Draw the labels in the left margin.
for(j=0; j<num_table_rows_total; j++) {
if(!row_info[j].is_visible) continue;
xpos = img_leftmargin - 3;
ypos = row_info[j].display_pos + (img_vpixelsperchar + dfont->nominal_height + 1)/2;
dnflags = 0;
if(fctx->render_as_unicode) dnflags |= DNFLAG_HEX | DNFLAG_LEADING_ZEROES;
draw_number(c, img, dfont, j*chars_per_row, xpos, ypos, dnflags);
}
// Render the glyphs.
for(k=0; k<fctx->font->num_chars; k++) {
if(fctx->codepoint_tmp[k] == DE_CODEPOINT_INVALID) continue;
if(!is_valid_char(&fctx->font->char_array[k])) continue;
rownum = fctx->codepoint_tmp[k] / chars_per_row;
colnum = fctx->codepoint_tmp[k] % chars_per_row;
if(rownum<0 || rownum>=num_table_rows_total) {
de_err(c, "internal: bad rownum");
de_fatalerror(c);
}
xpos = col_info[colnum].display_pos;
ypos = row_info[rownum].display_pos;
de_font_paint_character_idx(c, img, fctx->font, k, xpos, ypos,
DE_STOCKCOLOR_BLACK, DE_STOCKCOLOR_WHITE, 0);
}
de_bitmap_write_to_file_finfo(img, fi, createflags);
done:
if(dfont) {
de_free(c, dfont->char_array);
de_destroy_bitmap_font(c, dfont);
}
de_bitmap_destroy(img);
de_free(c, row_info);
de_free(c, col_info);
if(fctx) {
de_free(c, fctx->codepoint_tmp);
de_free(c, fctx);
}
}
static int do_image_pgm_ppm_ascii(deark *c, lctx *d, struct page_ctx *pg, de_int64 pos1)
{
struct deark_bitmap *img = NULL;
de_int64 nsamples; // For both input and output
de_int64 pos = pos1;
de_int64 xpos, ypos, sampidx;
char samplebuf[32];
size_t samplebuf_used;
de_byte b;
if(fmt_is_ppm(pg->fmt)) nsamples=3;
else nsamples=1;
img = de_bitmap_create(c, pg->width, pg->height, (int)nsamples);
xpos=0; ypos=0;
sampidx=0;
samplebuf_used=0;
while(1) {
if(pos >= c->infile->len) break; // end of file
if(ypos==(pg->height-1) && xpos>=pg->width) break; // end of image
if(ypos>=pg->height) break;
b = de_getbyte(pos++);
if(is_pnm_whitespace(b)) {
if(samplebuf_used>0) {
de_int64 v;
de_byte v_adj;
// Completed a sample
samplebuf[samplebuf_used] = '\0'; // NUL terminate for de_atoi64()
v = de_atoi64((const char*)samplebuf);
v_adj = de_scale_n_to_255(pg->maxval, v);
samplebuf_used = 0;
if(nsamples>1) {
de_bitmap_setsample(img, xpos, ypos, sampidx, v_adj);
}
else {
de_bitmap_setpixel_gray(img, xpos, ypos, v_adj);
}
sampidx++;
if(sampidx>=nsamples) {
sampidx=0;
xpos++;
if(xpos>=pg->width) {
xpos=0;
ypos++;
}
}
}
else { // Skip extra whitespace
continue;
}
}
else {
// Non-whitespace. Save for later.
if(samplebuf_used < sizeof(samplebuf_used)-1) {
samplebuf[samplebuf_used++] = b;
}
}
}
de_bitmap_write_to_file(img, NULL, 0);
de_bitmap_destroy(img);
return 1;
}