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#include "imext.h"
#include "imicon.h"
#include "msicon.h"
#include <string.h>
static void
ico_push_error(int error) {
char error_buf[ICO_MAX_MESSAGE];
ico_error_message(error, error_buf, sizeof(error_buf));
i_push_error(error, error_buf);
}
static
i_img *
read_one_icon(ico_reader_t *file, int index, int masked, int alpha_masked) {
ico_image_t *image;
int error;
i_img *result;
image = ico_image_read(file, index, &error);
if (!image) {
ico_push_error(error);
i_push_error(0, "error reading ICO/CUR image");
return NULL;
}
if (masked && (image->bit_count != 32 || alpha_masked)) {
/* check to make sure we should do the masking, if the mask has
nothing set we don't mask */
int pos;
int total = image->width * image->height;
unsigned char *inp = image->mask_data;
masked = 0;
for (pos = 0; pos < total; ++pos) {
if (*inp++) {
masked = 1;
break;
}
}
}
if (image->direct) {
int x, y;
i_color *line_buf;
i_color *outp;
ico_color_t *inp = image->image_data;
int channels = masked || image->bit_count == 32 ? 4 : 3;
if (!i_int_check_image_file_limits(image->width, image->height, channels, 1)) {
ico_image_release(image);
return NULL;
}
result = i_img_8_new(image->width, image->height, channels);
if (!result) {
ico_image_release(image);
return NULL;
}
line_buf = mymalloc(image->width * sizeof(i_color));
for (y = 0; y < image->height; ++y) {
outp = line_buf;
for (x = 0; x < image->width; ++x) {
outp->rgba.r = inp->r;
outp->rgba.g = inp->g;
outp->rgba.b = inp->b;
outp->rgba.a = inp->a;
++outp;
++inp;
}
i_plin(result, 0, image->width, y, line_buf);
}
myfree(line_buf);
}
else {
int pal_index;
int y;
unsigned char *image_data;
int channels = masked ? 4 : 3;
if (!i_int_check_image_file_limits(image->width, image->height, channels, 1)) {
ico_image_release(image);
return NULL;
}
result = i_img_pal_new(image->width, image->height, channels, 256);
if (!result) {
ico_image_release(image);
return NULL;
}
/* fill in the palette */
for (pal_index = 0; pal_index < image->palette_size; ++pal_index) {
i_color c;
c.rgba.r = image->palette[pal_index].r;
c.rgba.g = image->palette[pal_index].g;
c.rgba.b = image->palette[pal_index].b;
c.rgba.a = 255;
if (i_addcolors(result, &c, 1) < 0) {
i_push_error(0, "could not add color to palette");
ico_image_release(image);
i_img_destroy(result);
return NULL;
}
}
/* fill in the image data */
image_data = image->image_data;
for (y = 0; y < image->height; ++y) {
i_ppal(result, 0, image->width, y, image_data);
image_data += image->width;
}
}
{
unsigned char *inp = image->mask_data;
char *outp;
int x, y;
char *mask;
/* fill in the mask tag */
/* space for " .\n", width + 1 chars per line and NUL */
mask = mymalloc(3 + (image->width + 1) * image->height + 1);
outp = mask;
*outp++ = '.';
*outp++ = '*';
*outp++ = '\n';
for (y = 0; y < image->height; ++y) {
for (x = 0; x < image->width; ++x) {
*outp++ = *inp++ ? '*' : '.';
}
if (y != image->height - 1) /* not on the last line */
*outp++ = '\n';
}
*outp++ = '\0';
if (ico_type(file) == ICON_ICON)
i_tags_set(&result->tags, "ico_mask", mask, (outp-mask)-1);
else
i_tags_set(&result->tags, "cur_mask", mask, (outp-mask)-1);
myfree(mask);
}
/* if the user requests, treat the mask as an alpha channel.
Note: this converts the image into a direct image if it was paletted
*/
if (masked) {
unsigned char *inp = image->mask_data;
int x, y;
i_color *line_buf = mymalloc(sizeof(i_color) * image->width);
for (y = 0; y < image->height; ++y) {
int changed = 0;
int first = 0;
int last = 0;
for (x = 0; x < image->width; ++x) {
if (*inp++) {
if (!changed) {
first = x;
i_glin(result, first, image->width, y, line_buf);
changed = 1;
}
last = x;
line_buf[x-first].rgba.a = 0;
}
}
if (changed) {
i_plin(result, first, last + 1, y, line_buf);
}
}
myfree(line_buf);
}
if (ico_type(file) == ICON_ICON) {
i_tags_setn(&result->tags, "ico_bits", image->bit_count);
i_tags_set(&result->tags, "i_format", "ico", 3);
}
else {
i_tags_setn(&result->tags, "cur_bits", image->bit_count);
i_tags_set(&result->tags, "i_format", "cur", 3);
i_tags_setn(&result->tags, "cur_hotspotx", image->hotspot_x);
i_tags_setn(&result->tags, "cur_hotspoty", image->hotspot_y);
}
ico_image_release(image);
return result;
}
i_img *
i_readico_single(io_glue *ig, int index, int masked, int alpha_masked) {
ico_reader_t *file;
i_img *result;
int error;
i_clear_error();
file = ico_reader_open(ig, &error);
if (!file) {
ico_push_error(error);
i_push_error(0, "error opening ICO/CUR file");
return NULL;
}
/* the index is range checked by msicon.c - don't duplicate it here */
result = read_one_icon(file, index, masked, alpha_masked);
ico_reader_close(file);
return result;
}
i_img **
i_readico_multi(io_glue *ig, int *count, int masked, int alpha_masked) {
ico_reader_t *file;
int index;
int error;
i_img **imgs;
i_clear_error();
file = ico_reader_open(ig, &error);
if (!file) {
ico_push_error(error);
i_push_error(0, "error opening ICO/CUR file");
return NULL;
}
imgs = mymalloc(sizeof(i_img *) * ico_image_count(file));
*count = 0;
for (index = 0; index < ico_image_count(file); ++index) {
i_img *im = read_one_icon(file, index, masked, alpha_masked);
if (!im)
break;
imgs[(*count)++] = im;
}
ico_reader_close(file);
if (*count == 0) {
myfree(imgs);
return NULL;
}
return imgs;
}
static int
validate_image(i_img *im) {
if (im->xsize > 256 || im->ysize > 256) {
i_push_error(0, "image too large for ico file");
return 0;
}
if (im->channels < 1 || im->channels > 4) {
/* this shouldn't happen, but check anyway */
i_push_error(0, "invalid channels");
return 0;
}
return 1;
}
static int
translate_mask(i_img *im, unsigned char *out, const char *in) {
int x, y;
int one, zero;
int len = strlen(in);
int pos;
int newline; /* set to the first newline type we see */
int notnewline; /* set to whatever in ( "\n\r" newline isn't ) */
if (len < 3)
return 0;
zero = in[0];
one = in[1];
if (in[2] == '\n' || in[2] == '\r') {
newline = in[2];
notnewline = '\n' + '\r' - newline;
}
else {
return 0;
}
pos = 3;
y = 0;
while (y < im->ysize && pos < len) {
x = 0;
while (x < im->xsize && pos < len) {
if (in[pos] == newline) {
/* don't process it, we look for it later */
break;
}
else if (in[pos] == notnewline) {
++pos; /* just drop it */
}
else if (in[pos] == one) {
*out++ = 1;
++x;
++pos;
}
else if (in[pos] == zero) {
*out++ = 0;
++x;
++pos;
}
else if (in[pos] == ' ' || in[pos] == '\t') {
/* just ignore whitespace */
++pos;
}
else {
return 0;
}
}
while (x++ < im->xsize) {
*out++ = 0;
}
while (pos < len && in[pos] != newline)
++pos;
if (pos < len && in[pos] == newline)
++pos; /* actually skip the newline */
++y;
}
while (y++ < im->ysize) {
for (x = 0; x < im->xsize; ++x)
*out++ = 0;
}
return 1;
}
static void
derive_mask(i_img *im, ico_image_t *ico) {
if (im->channels == 1 || im->channels == 3) {
/* msicon.c's default mask is what we want */
myfree(ico->mask_data);
ico->mask_data = NULL;
}
else {
int channel = im->channels - 1;
i_sample_t *linebuf = mymalloc(sizeof(i_sample_t) * im->xsize);
int x, y;
unsigned char *out = ico->mask_data;
for (y = 0; y < im->ysize; ++y) {
i_gsamp(im, 0, im->xsize, y, linebuf, &channel, 1);
for (x = 0; x < im->xsize; ++x) {
*out++ = linebuf[x] == 255 ? 0 : 1;
}
}
myfree(linebuf);
}
}
static void
fill_image_base(i_img *im, ico_image_t *ico, const char *mask_name) {
int x, y;
ico->width = im->xsize;
ico->height = im->ysize;
ico->direct = im->type == i_direct_type;
if (ico->direct) {
int channels[4];
int set_alpha = 0;
ico_color_t *out;
i_sample_t *in;
unsigned char *linebuf = mymalloc(ico->width * 4);
ico->image_data = mymalloc(sizeof(ico_color_t) * ico->width * ico->height);
switch (im->channels) {
case 1:
channels[0] = channels[1] = channels[2] = channels[3] = 0;
++set_alpha;
break;
case 2:
channels[0] = channels[1] = channels[2] = 0;
channels[3] = 1;
break;
case 3:
channels[0] = 0;
channels[1] = 1;
channels[2] = 2;
channels[3] = 2;
++set_alpha;
break;
case 4:
channels[0] = 0;
channels[1] = 1;
channels[2] = 2;
channels[3] = 3;
break;
}
out = ico->image_data;
for (y = 0; y < im->ysize; ++y) {
i_gsamp(im, 0, im->xsize, y, linebuf, channels, 4);
in = linebuf;
for (x = 0; x < im->xsize; ++x) {
out->r = *in++;
out->g = *in++;
out->b = *in++;
out->a = set_alpha ? 255 : *in;
in++;
++out;
}
}
myfree(linebuf);
ico->palette = NULL;
}
else {
unsigned char *out;
i_color *colors;
int i;
i_palidx *in;
i_palidx *linebuf = mymalloc(sizeof(i_palidx) * ico->width);
ico->image_data = mymalloc(sizeof(ico_color_t) * ico->width * ico->height);
out = ico->image_data;
for (y = 0; y < im->ysize; ++y) {
i_gpal(im, 0, im->xsize, y, linebuf);
in = linebuf;
for (x = 0; x < im->xsize; ++x) {
*out++ = *in++;
}
}
myfree(linebuf);
ico->palette_size = i_colorcount(im);
ico->palette = mymalloc(sizeof(ico_color_t) * ico->palette_size);
colors = mymalloc(sizeof(i_color) * ico->palette_size);
i_getcolors(im, 0, colors, ico->palette_size);
for (i = 0; i < ico->palette_size; ++i) {
if (im->channels == 1 || im->channels == 2) {
ico->palette[i].r = ico->palette[i].g =
ico->palette[i].b = colors[i].rgba.r;
}
else {
ico->palette[i].r = colors[i].rgba.r;
ico->palette[i].g = colors[i].rgba.g;
ico->palette[i].b = colors[i].rgba.b;
}
}
myfree(colors);
}
{
/* build the mask */
int mask_index;
ico->mask_data = mymalloc(im->xsize * im->ysize);
if (!i_tags_find(&im->tags, mask_name, 0, &mask_index)
|| !im->tags.tags[mask_index].data
|| !translate_mask(im, ico->mask_data,
im->tags.tags[mask_index].data)) {
derive_mask(im, ico);
}
}
}
static void
unfill_image(ico_image_t *ico) {
myfree(ico->image_data);
if (ico->palette)
myfree(ico->palette);
if (ico->mask_data)
myfree(ico->mask_data);
}
static void
fill_image_icon(i_img *im, ico_image_t *ico) {
fill_image_base(im, ico, "ico_mask");
ico->hotspot_x = ico->hotspot_y = 0;
}
int
i_writeico_wiol(i_io_glue_t *ig, i_img *im) {
ico_image_t ico;
int error;
i_clear_error();
if (!validate_image(im))
return 0;
fill_image_icon(im, &ico);
if (!ico_write(ig, &ico, 1, ICON_ICON, &error)) {
ico_push_error(error);
unfill_image(&ico);
return 0;
}
unfill_image(&ico);
if (i_io_close(ig) < 0) {
i_push_error(0, "error closing output");
return 0;
}
return 1;
}
int
i_writeico_multi_wiol(i_io_glue_t *ig, i_img **ims, int count) {
ico_image_t *icons;
int error;
int i;
i_clear_error();
if (count > 0xFFFF) {
i_push_error(0, "too many images for ico files");
return 0;
}
for (i = 0; i < count; ++i)
if (!validate_image(ims[i]))
return 0;
icons = mymalloc(sizeof(ico_image_t) * count);
for (i = 0; i < count; ++i)
fill_image_icon(ims[i], icons + i);
if (!ico_write(ig, icons, count, ICON_ICON, &error)) {
ico_push_error(error);
for (i = 0; i < count; ++i)
unfill_image(icons + i);
myfree(icons);
return 0;
}
for (i = 0; i < count; ++i)
unfill_image(icons + i);
myfree(icons);
if (i_io_close(ig) < 0) {
i_push_error(0, "error closing output");
return 0;
}
return 1;
}
void
fill_image_cursor(i_img *im, ico_image_t *ico) {
int hotx, hoty;
fill_image_base(im, ico, "ico_mask");
if (!i_tags_get_int(&im->tags, "cur_hotspotx", 0, &hotx))
hotx = 0;
if (!i_tags_get_int(&im->tags, "cur_hotspoty", 0, &hoty))
hoty = 0;
if (hotx < 0)
hotx = 0;
else if (hotx >= im->xsize)
hotx = im->xsize - 1;
if (hoty < 0)
hoty = 0;
else if (hoty >= im->ysize)
hoty = im->ysize - 1;
ico->hotspot_x = hotx;
ico->hotspot_y = hoty;
}
int
i_writecur_wiol(i_io_glue_t *ig, i_img *im) {
ico_image_t ico;
int error;
i_clear_error();
if (!validate_image(im))
return 0;
fill_image_cursor(im, &ico);
if (!ico_write(ig, &ico, 1, ICON_CURSOR, &error)) {
ico_push_error(error);
unfill_image(&ico);
return 0;
}
unfill_image(&ico);
if (i_io_close(ig) < 0) {
i_push_error(0, "error closing output");
return 0;
}
return 1;
}
int
i_writecur_multi_wiol(i_io_glue_t *ig, i_img **ims, int count) {
ico_image_t *icons;
int error;
int i;
i_clear_error();
if (count > 0xFFFF) {
i_push_error(0, "too many images for ico files");
return 0;
}
for (i = 0; i < count; ++i)
if (!validate_image(ims[i]))
return 0;
icons = mymalloc(sizeof(ico_image_t) * count);
for (i = 0; i < count; ++i)
fill_image_cursor(ims[i], icons + i);
if (!ico_write(ig, icons, count, ICON_CURSOR, &error)) {
ico_push_error(error);
for (i = 0; i < count; ++i)
unfill_image(icons + i);
myfree(icons);
return 0;
}
for (i = 0; i < count; ++i)
unfill_image(icons + i);
myfree(icons);
if (i_io_close(ig) < 0) {
i_push_error(0, "error closing output");
return 0;
}
return 1;
}