void
sixel_chunk_destroy(
sixel_chunk_t * const /* in */ pchunk)
{
sixel_allocator_t *allocator;
if (pchunk) {
allocator = pchunk->allocator;
sixel_allocator_free(allocator, pchunk->buffer);
sixel_allocator_free(allocator, pchunk);
sixel_allocator_unref(allocator);
}
}
SIXELAPI void
sixel_dither_destroy(
sixel_dither_t /* in */ *dither)
{
sixel_allocator_t *allocator;
if (dither) {
allocator = dither->allocator;
sixel_allocator_free(allocator, dither->cachetable);
dither->cachetable = NULL;
sixel_allocator_free(allocator, dither);
sixel_allocator_unref(allocator);
}
}
SIXELSTATUS
sixel_chunk_new(
sixel_chunk_t /* out */ **ppchunk,
char const /* in */ *filename,
int /* in */ finsecure,
int const /* in */ *cancel_flag,
sixel_allocator_t /* in */ *allocator)
{
SIXELSTATUS status = SIXEL_FALSE;
if (ppchunk == NULL) {
sixel_helper_set_additional_message(
"sixel_chunk_new: ppchunk is null.");
status = SIXEL_BAD_ARGUMENT;
goto end;
}
if (allocator == NULL) {
sixel_helper_set_additional_message(
"sixel_chunk_new: allocator is null.");
status = SIXEL_BAD_ARGUMENT;
goto end;
}
*ppchunk = (sixel_chunk_t *)sixel_allocator_malloc(allocator, sizeof(sixel_chunk_t));
if (*ppchunk == NULL) {
sixel_helper_set_additional_message(
"sixel_chunk_new: sixel_allocator_malloc() failed.");
status = SIXEL_BAD_ALLOCATION;
goto end;
}
/* set allocator to chunk object */
(*ppchunk)->allocator = allocator;
status = sixel_chunk_init(*ppchunk, 1024 * 32);
if (SIXEL_FAILED(status)) {
sixel_allocator_free(allocator, *ppchunk);
*ppchunk = NULL;
goto end;
}
sixel_allocator_ref(allocator);
if (filename != NULL && strstr(filename, "://")) {
status = sixel_chunk_from_url(filename, *ppchunk, finsecure);
} else {
status = sixel_chunk_from_file(filename, *ppchunk, cancel_flag);
}
if (SIXEL_FAILED(status)) {
sixel_chunk_destroy(*ppchunk);
*ppchunk = NULL;
goto end;
}
status = SIXEL_OK;
end:
return status;
}
/* destroy output context object */
SIXELAPI void
sixel_output_destroy(sixel_output_t *output)
{
sixel_allocator_t *allocator;
if (output) {
allocator = output->allocator;
sixel_allocator_free(allocator, output);
sixel_allocator_unref(allocator);
}
}
static SIXELSTATUS
gif_init_frame(
sixel_frame_t /* in */ *frame,
gif_t /* in */ *pg,
unsigned char /* in */ *bgcolor,
int /* in */ reqcolors,
int /* in */ fuse_palette)
{
SIXELSTATUS status = SIXEL_OK;
int i;
int ncolors;
frame->delay = pg->delay;
ncolors = 2 << (pg->flags & 7);
if (frame->palette == NULL) {
frame->palette = (unsigned char *)sixel_allocator_malloc(frame->allocator, ncolors * 3);
} else if (frame->ncolors < ncolors) {
sixel_allocator_free(frame->allocator, frame->palette);
frame->palette = (unsigned char *)sixel_allocator_malloc(frame->allocator, ncolors * 3);
}
if (frame->palette == NULL) {
sixel_helper_set_additional_message(
"gif_init_frame: sixel_allocator_malloc() failed.");
status = SIXEL_BAD_ALLOCATION;
goto end;
}
frame->ncolors = ncolors;
if (frame->ncolors <= reqcolors && fuse_palette) {
frame->pixelformat = SIXEL_PIXELFORMAT_PAL8;
sixel_allocator_free(frame->allocator, frame->pixels);
frame->pixels = (unsigned char *)sixel_allocator_malloc(frame->allocator,
frame->width * frame->height);
if (frame->pixels == NULL) {
sixel_helper_set_additional_message(
"sixel_allocator_malloc() failed in gif_init_frame().");
status = SIXEL_BAD_ALLOCATION;
goto end;
}
memcpy(frame->pixels, pg->out, frame->width * frame->height);
for (i = 0; i < frame->ncolors; ++i) {
frame->palette[i * 3 + 0] = pg->color_table[i * 3 + 2];
frame->palette[i * 3 + 1] = pg->color_table[i * 3 + 1];
frame->palette[i * 3 + 2] = pg->color_table[i * 3 + 0];
}
if (pg->lflags & 0x80) {
if (pg->eflags & 0x01) {
if (bgcolor) {
frame->palette[pg->transparent * 3 + 0] = bgcolor[0];
frame->palette[pg->transparent * 3 + 1] = bgcolor[1];
frame->palette[pg->transparent * 3 + 2] = bgcolor[2];
} else {
frame->transparent = pg->transparent;
}
}
} else if (pg->flags & 0x80) {
if (pg->eflags & 0x01) {
if (bgcolor) {
frame->palette[pg->transparent * 3 + 0] = bgcolor[0];
frame->palette[pg->transparent * 3 + 1] = bgcolor[1];
frame->palette[pg->transparent * 3 + 2] = bgcolor[2];
} else {
frame->transparent = pg->transparent;
}
}
}
} else {
frame->pixelformat = SIXEL_PIXELFORMAT_RGB888;
frame->pixels = (unsigned char *)sixel_allocator_malloc(frame->allocator,
pg->w * pg->h * 3);
if (frame->pixels == NULL) {
sixel_helper_set_additional_message(
"sixel_allocator_malloc() failed in gif_init_frame().");
status = SIXEL_BAD_ALLOCATION;
goto end;
}
for (i = 0; i < pg->w * pg->h; ++i) {
frame->pixels[i * 3 + 0] = pg->color_table[pg->out[i] * 3 + 2];
frame->pixels[i * 3 + 1] = pg->color_table[pg->out[i] * 3 + 1];
frame->pixels[i * 3 + 2] = pg->color_table[pg->out[i] * 3 + 0];
}
}
frame->multiframe = (pg->loop_count != (-1));
status = SIXEL_OK;
end:
return status;
}
