#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include <string.h>
#include <setjmp.h>
#include <math.h>
#include <magic.h>
#include <jpeglib.h>
#include <jerror.h>
#include <glib.h>
#include <gtk/gtk.h>
#include <gdk/gdkx.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gperl.h>
#include <gtk2perl.h>
#include <assert.h>
#if WEBP
#include <webp/demux.h>
#include <webp/decode.h>
#endif
#if JXL
#include <jxl/decode.h>
#include "jxl/thread_parallel_runner.h"
#endif
#include "perlmulticore.h"
#define IW 80 /* MUST match Schnauzer.pm! */
#define IH 60 /* MUST match Schnauzer.pm! */
#define LINELENGTH 240
#define ELLIPSIS "\xe2\x80\xa6"
typedef char *octet_string;
static magic_t magic_cookie[2]; /* !mime, mime */
struct jpg_err_mgr
{
struct jpeg_error_mgr err;
jmp_buf setjmp_buffer;
};
static void
cv_error_exit (j_common_ptr cinfo)
{
cinfo->err->output_message (cinfo);
longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
}
static void
cv_error_output (j_common_ptr cinfo)
{
char msg[JMSG_LENGTH_MAX];
cinfo->err->format_message (cinfo, msg);
fprintf (stderr, "JPEG decoding error: %s\n", msg);
return;
}
static void
rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
unsigned int *h, unsigned int *s, unsigned int *v)
{
unsigned int mx = r; if (g > mx) mx = g; if (b > mx) mx = b;
unsigned int mn = r; if (g < mn) mn = g; if (b < mn) mn = b;
unsigned int delta = mx - mn;
*v = mx;
*s = mx ? delta * 255 / mx : 0;
if (delta == 0)
*h = 0;
else
{
if (r == mx)
*h = ((int)g - (int)b) * 255 / (int)(delta * 3);
else if (g == mx)
*h = ((int)b - (int)r) * 255 / (int)(delta * 3) + 52;
else if (b == mx)
*h = ((int)r - (int)g) * 255 / (int)(delta * 3) + 103;
*h &= 255;
}
}
struct feature {
float v1, v2, v3; // mean, square, cube
int n;
};
static void
feature_init (struct feature *f)
{
f->v1 = 0.;
f->v2 = 0.;
f->v3 = 0.;
f->n = 0;
}
// didn't find an algorithm to neatly do mean, variance and skew in one pass.
// elmex ist schuld.
static void
feature_update_pass_1 (struct feature *f, unsigned int v)
{
f->v1 += v;
f->n += 1;
}
static void
feature_finish_pass_1 (struct feature *f)
{
if (f->n < 1)
return;
f->v1 /= f->n;
}
static void
feature_update_pass_2 (struct feature *f, unsigned int v)
{
float d = v - f->v1;
f->v2 += d * d;
f->v3 += d * d * d;
}
static void
feature_finish_pass_2 (struct feature *f)
{
if (f->n < 1)
return;
f->v2 /= f->n;
f->v3 /= f->n;
f->v1 /= 255.;
f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2);
f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
}
static guint32 a85_val;
static guint a85_cnt;
static guchar a85_buf[LINELENGTH], *a85_ptr;
static void
a85_init (void)
{
a85_cnt = 4;
a85_ptr = a85_buf;
}
static void
a85_push (PerlIO *fp, guchar c)
{
a85_val = a85_val << 8 | c;
if (!--a85_cnt)
{
a85_cnt = 4;
if (a85_val)
{
a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
a85_ptr[0] = (a85_val ) + 33;
a85_ptr += 5;
}
else
*a85_ptr++ = 'z';
if (a85_ptr >= a85_buf + sizeof (a85_buf) - 7)
{
*a85_ptr++ = '\n';
PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
a85_ptr = a85_buf;
}
}
}
static void
a85_finish (PerlIO *fp)
{
while (a85_cnt != 4)
a85_push (fp, 0);
*a85_ptr++ = '~'; // probably buggy end-marker
*a85_ptr++ = '>'; // probably buggy end-marker
*a85_ptr++ = '\n';
PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
}
/////////////////////////////////////////////////////////////////////////////
// memory source for libjpeg
static void cv_ms_init (j_decompress_ptr cinfo)
{
}
static void cv_ms_term (j_decompress_ptr cinfo)
{
}
static boolean cv_ms_fill (j_decompress_ptr cinfo)
{
// unexpected EOF, warn and generate fake EOI marker
WARNMS (cinfo, JWRN_JPEG_EOF);
struct jpeg_source_mgr *src = (struct jpeg_source_mgr *)cinfo->src;
static const JOCTET eoi[] = { 0xFF, JPEG_EOI };
src->next_input_byte = eoi;
src->bytes_in_buffer = sizeof (eoi);
return TRUE;
}
static void cv_ms_skip (j_decompress_ptr cinfo, long num_bytes)
{
struct jpeg_source_mgr *src = (struct jpeg_source_mgr *)cinfo->src;
src->next_input_byte += num_bytes;
src->bytes_in_buffer -= num_bytes;
}
static void cv_jpeg_mem_src (j_decompress_ptr cinfo, void *buf, size_t buflen)
{
struct jpeg_source_mgr *src;
if (!cinfo->src)
cinfo->src = (struct jpeg_source_mgr *)
(*cinfo->mem->alloc_small) (
(j_common_ptr) cinfo, JPOOL_PERMANENT, sizeof (struct jpeg_source_mgr)
);
src = (struct jpeg_source_mgr *)cinfo->src;
src->init_source = cv_ms_init;
src->fill_input_buffer = cv_ms_fill;
src->skip_input_data = cv_ms_skip;
src->resync_to_restart = jpeg_resync_to_restart;
src->term_source = cv_ms_term;
src->next_input_byte = (JOCTET *)buf;
src->bytes_in_buffer = buflen;
}
/////////////////////////////////////////////////////////////////////////////
/* great, the jpeg-xl reference implementaton requires us to parse bmff files */
struct bmff_box
{
char type[4];
const uint8_t *ptr;
size_t size;
};
static int
bmff_parse_box (struct bmff_box *box, const uint8_t **next_in, size_t *avail_in)
{
if (*avail_in < 8)
return 0;
box->size = ((*next_in)[0] << 24)
| ((*next_in)[1] << 16)
| ((*next_in)[2] << 8)
| ((*next_in)[3] );
if (box->size < 8)
return 0;
if (*avail_in < box->size)
return 0;
memcpy (box->type, *next_in + 4, 4);
box->ptr = *next_in + 8;
*next_in += box->size;
*avail_in -= box->size;
box->size -= 8;
return 1;
}
/////////////////////////////////////////////////////////////////////////////
MODULE = Gtk2::CV PACKAGE = Gtk2::CV
PROTOTYPES: ENABLE
# calculate the common prefix length of two strings
# missing function in perl. really :)
int
common_prefix_length (a, b)
unsigned char *a = (unsigned char *)SvPVutf8_nolen ($arg);
unsigned char *b = (unsigned char *)SvPVutf8_nolen ($arg);
CODE:
RETVAL = 0;
while (*a == *b && *a)
{
RETVAL += (*a & 0xc0) != 0x80;
a++, b++;
}
OUTPUT:
RETVAL
const char *
magic (SV *path_or_data)
ALIAS:
magic = 0
magic_mime = 1
magic_buffer = 2
magic_buffer_mime = 3
CODE:
{
STRLEN len;
char *data = SvPVbyte (path_or_data, len);
if (!magic_cookie[0])
{
magic_cookie[0] = magic_open (MAGIC_SYMLINK);
magic_cookie[1] = magic_open (MAGIC_SYMLINK | MAGIC_MIME_TYPE);
magic_load (magic_cookie[0], 0);
magic_load (magic_cookie[1], 0);
}
perlinterp_release ();
RETVAL = ix & 2
? magic_buffer (magic_cookie[ix & 1], data, len)
: magic_file (magic_cookie[ix & 1], data);
perlinterp_acquire ();
}
OUTPUT:
RETVAL
# missing/broken in Gtk2 perl module
void
gdk_window_clear_hints (GdkWindow *window)
CODE:
gdk_window_set_geometry_hints (window, 0, 0);
gboolean
gdk_net_wm_supports (GdkAtom property)
CODE:
#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
RETVAL = gdk_net_wm_supports (property);
#else
RETVAL = 0;
#endif
OUTPUT:
RETVAL
GdkPixbuf_noinc *
dealpha_expose (GdkPixbuf *pb)
CODE:
perlinterp_release ();
{
int w = gdk_pixbuf_get_width (pb);
int h = gdk_pixbuf_get_height (pb);
int bpp = gdk_pixbuf_get_n_channels (pb);
int x, y, i;
guchar *src = gdk_pixbuf_get_pixels (pb), *dst;
int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
dst = gdk_pixbuf_get_pixels (RETVAL);
dstr = gdk_pixbuf_get_rowstride (RETVAL);
for (x = 0; x < w; x++)
for (y = 0; y < h; y++)
for (i = 0; i < 3; i++)
dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
}
perlinterp_acquire ();
OUTPUT:
RETVAL
GdkPixbuf_noinc *
rotate (GdkPixbuf *pb, int angle)
CODE:
perlinterp_release ();
if (angle < 0)
angle += 360;
RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
: angle);
perlinterp_acquire ();
OUTPUT:
RETVAL
const char *
filetype (SV *image_data)
CODE:
{
STRLEN data_len;
U8 *data = SvPVbyte (image_data, data_len);
static const unsigned char jxl_header[] = {
0, 0, 0, 0x0c, 0x4a, 0x58, 0x4c, 0x20, 0x0d, 0xa, 0x87, 0x0a
};
if (data_len >= 20
&& data[0] == 0xff
&& data[1] == 0xd8
&& data[2] == 0xff)
RETVAL = "image/jpeg";
else if (data_len >= 12
&& data[ 0] == (U8)'R'
&& data[ 1] == (U8)'I'
&& data[ 2] == (U8)'F'
&& data[ 3] == (U8)'F'
&& data[ 8] == (U8)'W'
&& data[ 9] == (U8)'E'
&& data[10] == (U8)'B'
&& data[11] == (U8)'P')
RETVAL = "image/webp";
else if (data_len >= 16
&& data[ 0] == 0x89
&& data[ 1] == (U8)'P'
&& data[ 2] == (U8)'N'
&& data[ 3] == (U8)'G'
&& data[ 4] == 0x0d
&& data[ 5] == 0x0a
&& data[ 6] == 0x1a
&& data[ 7] == 0x0a)
RETVAL = "image/png";
else if (data_len >= sizeof (jxl_header) && memcmp (data, jxl_header, sizeof (jxl_header)) == 0)
RETVAL = "image/jxl"; // todo: might want to use JxlSignatureCheck
else if (data_len >= 2
&& data[0] == 0xff
&& data[1] == 0x0a)
RETVAL = "image/jxl";
else if (data_len >= 13
&& data[0] == 'G'
&& data[1] == 'I'
&& data[2] == 'F'
&& data[3] == '8'
//&& (data[4] == '7' || data[4] == '9')
&& data[5] == 'a')
{
RETVAL = "image/gif";
// now see if its animated - we require the netscape application header for this
int ofs = 13;
if (data[10] & 0x80)
ofs += (1 << ((data[10] & 7) + 1)) * 3;
if (data_len >= ofs + 2 + 1 + 11)
{
// skip a graphic control extension block. we assume
// there is at most one such block - while the NAB
// has to come firstz, some files do not obey this
if (data[ofs] == 0x21 && data[ofs + 1] == 0xf9)
ofs += 3 + data[ofs + 2] + 1;
if (data_len >= ofs + 2 + 1 + 11)
if (!memcmp (data + ofs, "\x21\xff\x0bNETSCAPE2.0", sizeof ("\x21\xff\x0bNETSCAPE2.0") - 1))
RETVAL = "video/gif";
}
}
else
XSRETURN_UNDEF;
}
OUTPUT:
RETVAL
GdkPixbuf_noinc *
decode_webp (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
CODE:
{
#if WEBP
STRLEN data_size;
int alpha;
WebPData data;
WebPDemuxer *demux;
WebPIterator iter;
WebPDecoderConfig config;
int inw, inh;
data.bytes = (uint8_t *)SvPVbyte (image_data, data_size);
data.size = data_size;
perlinterp_release ();
RETVAL = 0;
if (!(demux = WebPDemux (&data)))
goto err_demux;
if (!WebPDemuxGetFrame (demux, 1, &iter))
goto err_iter;
if (!WebPInitDecoderConfig (&config))
goto err_iter;
config.options.use_threads = 1;
if (WebPGetFeatures (iter.fragment.bytes, iter.fragment.size, &config.input) != VP8_STATUS_OK)
goto err_iter;
inw = config.input.width;
inh = config.input.height;
if (thumbnail)
{
if (inw * ih > inh * iw)
ih = (iw * inh + inw - 1) / inw;
else
iw = (ih * inw + inh - 1) / inh;
config.options.bypass_filtering = 1;
config.options.no_fancy_upsampling = 1;
config.options.use_scaling = 1;
config.options.scaled_width = iw;
config.options.scaled_height = ih;
}
else
{
iw = inw;
ih = inh;
}
alpha = !!config.input.has_alpha;
RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, alpha, 8, iw, ih);
if (!RETVAL)
goto err_iter;
config.output.colorspace = alpha ? MODE_RGBA : MODE_RGB;
config.output.u.RGBA.rgba = gdk_pixbuf_get_pixels (RETVAL);
config.output.u.RGBA.stride = gdk_pixbuf_get_rowstride (RETVAL);
config.output.u.RGBA.size = gdk_pixbuf_get_byte_length (RETVAL);
config.output.is_external_memory = 1;
if (WebPDecode (iter.fragment.bytes, iter.fragment.size, &config) != VP8_STATUS_OK)
{
g_object_unref (RETVAL);
RETVAL = 0;
goto err_iter;
}
err_iter:
WebPDemuxReleaseIterator (&iter);
err_demux:
WebPDemuxDelete (demux);
perlinterp_acquire ();
#else
croak ("load_webp: webp not enabled at compile time");
#endif
}
OUTPUT:
RETVAL
GdkPixbuf_noinc *
decode_jxl (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
CODE:
{
#if JXL
JxlDecoder *dec;
JxlBasicInfo info;
const uint8_t *next_in = (uint8_t *)SvPVbyte_nolen (image_data);
size_t avail_in = SvCUR (image_data);
const char *error = 0;
JxlDecoderStatus status;
static void *runner_cache;
void *runner = 0;
RETVAL = 0;
if (runner_cache)
runner = runner_cache;
else
runner = JxlThreadParallelRunnerCreate (0, JxlThreadParallelRunnerDefaultNumWorkerThreads ());
runner_cache = 0;
perlinterp_release ();
dec = JxlDecoderCreate (0);
error = "JxlDecoderCreate failed";
if (!dec)
goto done;
status = JxlDecoderSetParallelRunner (dec, JxlThreadParallelRunner, runner);
error = "JxlDecoderSetParallelRunner failed";
if (status != JXL_DEC_SUCCESS)
goto done;
error = "JxlDecoderSubscribeEvents failed";
status = JxlDecoderSubscribeEvents (dec, JXL_DEC_BASIC_INFO | JXL_DEC_FULL_IMAGE);
if (status != JXL_DEC_SUCCESS)
goto done;
status = JxlDecoderSetInput (dec, next_in, avail_in);
error = "JxlDecoderSetInput failed";
if (status != JXL_DEC_SUCCESS)
goto done;
for (;;)
{
status = JxlDecoderProcessInput (dec);
switch (status)
{
case JXL_DEC_FULL_IMAGE:
error = 0;
goto done;
case JXL_DEC_ERROR:
error = "JxlDecoderProcessInput failed";
goto done;
case JXL_DEC_NEED_MORE_INPUT:
error = "incomplete file";
goto done;
case JXL_DEC_SUCCESS:
error = "incomplete decode";
goto done;
case JXL_DEC_BASIC_INFO:
{
status = JxlDecoderGetBasicInfo (dec, &info);
error = "JxlDecoderGetBasicInfo failed";
if (status != JXL_DEC_SUCCESS)
goto done;
RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, !!info.alpha_bits, 8, info.xsize, info.ysize);
error = "unable to allocate pixbuf";
if (!RETVAL)
goto done;
JxlPixelFormat format = {
info.alpha_bits ? 4 : 3,
JXL_TYPE_UINT8,
JXL_NATIVE_ENDIAN,
gdk_pixbuf_get_rowstride (RETVAL)
};
// cannot use gdk_pixbuf_get_byte_length because that does
// not return the size of the buffer, but the size of the buffer without
// the last padding bytes. the internal buffer is rowstride * ysize,
// and this is what the jxl decoder needs. none of this is documented
// in either library, of course.
status = JxlDecoderSetImageOutBuffer (
dec,
&format,
gdk_pixbuf_get_pixels (RETVAL),
gdk_pixbuf_get_rowstride (RETVAL) * info.ysize
);
error = "JxlDecoderSetImageOutBuffer failed";
if (status != JXL_DEC_SUCCESS)
goto done;
}
break;
default:
error = "unexpected event";
goto done;
}
}
done:
if (dec)
JxlDecoderDestroy (dec);
perlinterp_acquire ();
if (runner_cache)
JxlThreadParallelRunnerDestroy (runner);
runner_cache = runner;
if (error)
{
if (RETVAL)
g_object_unref (RETVAL);
croak ("load_jxl: %s (status %d)", error, status);
}
#else
croak ("load_jxl: jpeg-xl not enabled at compile time");
#endif
}
OUTPUT:
RETVAL
GdkPixbuf_noinc *
decode_jpeg (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
CODE:
{
struct jpeg_decompress_struct cinfo;
struct jpg_err_mgr jerr;
int rs;
volatile GdkPixbuf *pb = 0;
STRLEN data_len;
guchar *data = SvPVbyte (image_data, data_len);
RETVAL = 0;
perlinterp_release ();
cinfo.err = jpeg_std_error (&jerr.err);
jerr.err.error_exit = cv_error_exit;
jerr.err.output_message = cv_error_output;
if ((rs = setjmp (jerr.setjmp_buffer)))
{
jpeg_destroy_decompress (&cinfo);
if (pb)
g_object_unref ((gpointer)pb);
perlinterp_acquire ();
XSRETURN_UNDEF;
}
if (!data_len)
longjmp (jerr.setjmp_buffer, 4);
jpeg_create_decompress (&cinfo);
cv_jpeg_mem_src (&cinfo, data, data_len);
jpeg_read_header (&cinfo, TRUE);
cinfo.dct_method = JDCT_DEFAULT;
cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
cinfo.do_block_smoothing = FALSE;
cinfo.out_color_space = JCS_RGB;
cinfo.quantize_colors = FALSE;
cinfo.scale_num = 1;
cinfo.scale_denom = 1;
jpeg_calc_output_dimensions (&cinfo);
if (thumbnail)
{
cinfo.dct_method = JDCT_FASTEST;
cinfo.do_fancy_upsampling = FALSE;
while (cinfo.scale_denom < 8
&& cinfo.output_width >= iw*4
&& cinfo.output_height >= ih*4)
{
cinfo.scale_denom <<= 1;
jpeg_calc_output_dimensions (&cinfo);
}
}
if (cinfo.output_components != 3)
longjmp (jerr.setjmp_buffer, 3);
if (cinfo.jpeg_color_space == JCS_YCCK || cinfo.jpeg_color_space == JCS_CMYK)
{
cinfo.out_color_space = JCS_CMYK;
cinfo.output_components = 4;
}
pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, cinfo.output_components == 4, 8, cinfo.output_width, cinfo.output_height);
if (!RETVAL)
longjmp (jerr.setjmp_buffer, 2);
data = gdk_pixbuf_get_pixels (RETVAL);
rs = gdk_pixbuf_get_rowstride (RETVAL);
jpeg_start_decompress (&cinfo);
while (cinfo.output_scanline < cinfo.output_height)
{
int remaining = cinfo.output_height - cinfo.output_scanline;
JSAMPROW rp[4];
rp [0] = data + cinfo.output_scanline * rs;
rp [1] = (guchar *)rp [0] + rs;
rp [2] = (guchar *)rp [1] + rs;
rp [3] = (guchar *)rp [2] + rs;
jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
}
if (cinfo.out_color_space == JCS_CMYK)
{
guchar *end = data + cinfo.output_height * rs;
while (data < end)
{
U32 c = data [0];
U32 m = data [1];
U32 y = data [2];
U32 k = data [3];
if (0)
if (cinfo.Adobe_transform == 2)
{
c ^= 0xff;
m ^= 0xff;
y ^= 0xff;
k ^= 0xff;
}
data [0] = (c * k + 0x80) / 0xff;
data [1] = (m * k + 0x80) / 0xff;
data [2] = (y * k + 0x80) / 0xff;
data [3] = 0xff;
data += 4;
}
}
jpeg_finish_decompress (&cinfo);
jpeg_destroy_decompress (&cinfo);
perlinterp_acquire ();
}
OUTPUT:
RETVAL
void
compare (GdkPixbuf *a, GdkPixbuf *b)
PPCODE:
perlinterp_release ();
{
int w = gdk_pixbuf_get_width (a);
int h = gdk_pixbuf_get_height (a);
int sa = gdk_pixbuf_get_rowstride (a);
int sb = gdk_pixbuf_get_rowstride (b);
guchar *pa = gdk_pixbuf_get_pixels (a);
guchar *pb = gdk_pixbuf_get_pixels (b);
int x, y;
assert (w == gdk_pixbuf_get_width (b));
assert (h == gdk_pixbuf_get_height (b));
assert (gdk_pixbuf_get_n_channels (a) == 3);
assert (gdk_pixbuf_get_n_channels (b) == 3);
double diff = 0.;
int peak = 0;
if (w && h)
for (y = 0; y < h; y++)
{
guchar *pa_ = pa + y * sa;
guchar *pb_ = pb + y * sb;
for (x = 0; x < w; x++)
{
int d;
d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
}
}
perlinterp_acquire ();
EXTEND (SP, 2);
PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
PUSHs (sv_2mortal (newSVnv (peak / 255.)));
}
#############################################################################
MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
# currently only works for filenames (octet strings)
SV *
foldcase (SV *pathsv)
PROTOTYPE: $
CODE:
{
STRLEN plen;
U8 *path = (U8 *)SvPV (pathsv, plen);
U8 *pend = path + plen;
U8 dst [plen * 8 * 3], *dstp = dst;
while (path < pend)
{
U8 ch = *path;
if (ch >= 'a' && ch <= 'z')
*dstp++ = *path++;
else if (ch >= 'A' && ch <= 'Z')
*dstp++ = *path++ + ('a' - 'A');
else if (ch >= '0' && ch <= '9')
{
/* version sort, up to 8 digits */
STRLEN el, nl = 0;
while (*path >= '0' && *path <= '9' && path < pend)
path++, nl++;
for (el = nl; el < 8; el++)
*dstp++ = '0';
memcpy (dstp, path - nl, nl);
dstp += nl;
}
else
*dstp++ = *path++;
#if 0
else
{
STRLEN cl;
to_utf8_fold (path, dstp, &cl);
dstp += cl;
path += is_utf8_char (path);
}
#endif
}
RETVAL = newSVpvn ((const char *)dst, dstp - dst);
}
OUTPUT:
RETVAL
GdkPixbuf_noinc *
p7_to_pb (int w, int h, SV *src_sv)
PROTOTYPE: @
CODE:
{
int x, y;
guchar *dst, *d;
int dstr;
guchar *src = (guchar *)SvPVbyte_nolen (src_sv);
RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
dst = gdk_pixbuf_get_pixels (RETVAL);
dstr = gdk_pixbuf_get_rowstride (RETVAL);
for (y = 0; y < h; y++)
for (d = dst + y * dstr, x = 0; x < w; x++)
{
*d++ = (((*src >> 5) & 7) * 255 + 4) / 7;
*d++ = (((*src >> 2) & 7) * 255 + 4) / 7;
*d++ = (((*src >> 0) & 3) * 255 + 2) / 3;
src++;
}
}
OUTPUT:
RETVAL
#############################################################################
MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
void
dump_ascii85 (PerlIO *fp, GdkPixbuf *pb)
CODE:
{
int w = gdk_pixbuf_get_width (pb);
int h = gdk_pixbuf_get_height (pb);
int x, y, i;
guchar *dst;
int bpp = gdk_pixbuf_get_n_channels (pb);
guchar *src = gdk_pixbuf_get_pixels (pb);
int sstr = gdk_pixbuf_get_rowstride (pb);
a85_init ();
for (y = 0; y < h; y++)
for (x = 0; x < w; x++)
for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
a85_push (fp, src [x * bpp + y * sstr + i]);
a85_finish (fp);
}
void
dump_binary (PerlIO *fp, GdkPixbuf *pb)
CODE:
{
int w = gdk_pixbuf_get_width (pb);
int h = gdk_pixbuf_get_height (pb);
int x, y, i;
guchar *dst;
int bpp = gdk_pixbuf_get_n_channels (pb);
guchar *src = gdk_pixbuf_get_pixels (pb);
int sstr = gdk_pixbuf_get_rowstride (pb);
for (y = 0; y < h; y++)
for (x = 0; x < w; x++)
for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
}
#############################################################################
MODULE = Gtk2::CV PACKAGE = Gtk2::CV
SV *
pb_to_hv84 (GdkPixbuf *pb)
CODE:
{
int w = gdk_pixbuf_get_width (pb);
int h = gdk_pixbuf_get_height (pb);
int x, y;
guchar *dst;
int bpp = gdk_pixbuf_get_n_channels (pb);
guchar *src = gdk_pixbuf_get_pixels (pb);
int sstr = gdk_pixbuf_get_rowstride (pb);
RETVAL = newSV (6 * 8 * 12 / 8);
SvPOK_only (RETVAL);
SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
dst = (guchar *)SvPVX (RETVAL);
/* some primitive error distribution + random dithering */
for (y = 0; y < h; y++)
{
guchar *p = src + y * sstr;
for (x = 0; x < w; x += 2)
{
unsigned int r, g, b, h, s, v, H, V1, V2;
if (bpp == 3)
r = *p++, g = *p++, b = *p++;
else if (bpp == 1)
r = g = b = *p++;
else
abort ();
rgb_to_hsv (r, g, b, &h, &s, &v);
H = (h * 15 / 255) << 4;
V1 = v;
if (bpp == 3)
r = *p++, g = *p++, b = *p++;
else if (bpp == 1)
r = g = b = *p++;
else
abort ();
rgb_to_hsv (r, g, b, &h, &s, &v);
H |= h * 15 / 255;
V2 = v;
*dst++ = H;
*dst++ = V1;
*dst++ = V2;
}
}
}
OUTPUT:
RETVAL
SV *
hv84_to_av (unsigned char *hv84)
CODE:
{
int i = 72 / 3;
AV *av = newAV ();
RETVAL = (SV *)newRV_noinc ((SV *)av);
while (i--)
{
int h = *hv84++;
int v1 = *hv84++;
int v2 = *hv84++;
av_push (av, newSViv (v1));
av_push (av, newSViv ((h >> 4) * 255 / 15));
av_push (av, newSViv (v2));
av_push (av, newSViv ((h & 15) * 255 / 15));
}
}
OUTPUT:
RETVAL
#############################################################################
MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
SV *
extract_features (SV *ar)
CODE:
{
int i;
AV *av, *result;
if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV)
croak ("Not an array ref as first argument to extract_features");
av = (AV *) SvRV (ar);
result = newAV ();
for (i = 0; i <= av_len (av); ++i)
{
SV *sv = *av_fetch (av, i, 1);
SV *histsv = newSV (9 * sizeof (float) + 1);
SvPOK_on (histsv);
SvCUR_set (histsv, 9 * sizeof (float));
float *hist = (float *)SvPVX (histsv);
struct feature f_h, f_s, f_v;
feature_init (&f_h);
feature_init (&f_s);
feature_init (&f_v);
{
STRLEN len;
unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
while (len >= 3)
{
unsigned int r, g, b, h, s, v;
r = *buf++; g = *buf++; b = *buf++;
rgb_to_hsv (r, g, b, &h, &s, &v);
feature_update_pass_1 (&f_h, h);
feature_update_pass_1 (&f_s, s);
feature_update_pass_1 (&f_v, v);
len -= 3;
}
feature_finish_pass_1 (&f_h);
feature_finish_pass_1 (&f_s);
feature_finish_pass_1 (&f_v);
}
{
STRLEN len;
unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
while (len >= 3)
{
unsigned int r, g, b, h, s, v;
r = *buf++; g = *buf++; b = *buf++;
rgb_to_hsv (r, g, b, &h, &s, &v);
feature_update_pass_2 (&f_h, h);
feature_update_pass_2 (&f_s, s);
feature_update_pass_2 (&f_v, v);
len -= 3;
}
feature_finish_pass_2 (&f_h);
feature_finish_pass_2 (&f_s);
feature_finish_pass_2 (&f_v);
}
hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
av_push (result, histsv);
}
RETVAL = newRV_noinc ((SV *)result);
}
OUTPUT:
RETVAL