mirror of https://github.com/GNOME/gimp.git
app: remove gaussian_blur_region() and its helpers
This commit is contained in:
Michael Natterer
parent
4455e29303
commit
ef3cfb48cc
|
|
@ -95,8 +95,6 @@ static const guchar no_mask = OPAQUE_OPACITY;
|
|||
|
||||
/* Local function prototypes */
|
||||
|
||||
static gint * make_curve (gdouble sigma_square,
|
||||
gint *length);
|
||||
static gdouble cubic (gdouble dx,
|
||||
gint jm1,
|
||||
gint j,
|
||||
|
|
@ -117,42 +115,6 @@ static void apply_layer_mode_replace (const guchar *src1,
|
|||
static inline void rotate_pointers (guchar **p,
|
||||
guint32 n);
|
||||
|
||||
/*
|
||||
* The equations: g(r) = exp (- r^2 / (2 * sigma^2))
|
||||
* r = sqrt (x^2 + y^2)
|
||||
*/
|
||||
|
||||
static gint *
|
||||
make_curve (gdouble sigma_square,
|
||||
gint *length)
|
||||
{
|
||||
const gdouble sigma2 = 2 * sigma_square;
|
||||
const gdouble l = sqrt (-sigma2 * LOG_1_255);
|
||||
|
||||
gint *curve;
|
||||
gint i, n;
|
||||
|
||||
n = ceil (l) * 2;
|
||||
if ((n % 2) == 0)
|
||||
n += 1;
|
||||
|
||||
curve = g_new (gint, n);
|
||||
|
||||
*length = n / 2;
|
||||
curve += *length;
|
||||
curve[0] = 255;
|
||||
|
||||
for (i = 1; i <= *length; i++)
|
||||
{
|
||||
gint temp = (gint) (exp (- SQR (i) / sigma2) * 255);
|
||||
|
||||
curve[-i] = temp;
|
||||
curve[i] = temp;
|
||||
}
|
||||
|
||||
return curve;
|
||||
}
|
||||
|
||||
|
||||
static inline void
|
||||
run_length_encode (const guchar *src,
|
||||
|
|
@ -2312,177 +2274,6 @@ separate_alpha_region (PixelRegion *srcR)
|
|||
}
|
||||
}
|
||||
|
||||
void
|
||||
gaussian_blur_region (PixelRegion *srcR,
|
||||
gdouble radius_x,
|
||||
gdouble radius_y)
|
||||
{
|
||||
glong width, height;
|
||||
guint bytes;
|
||||
guchar *src, *sp;
|
||||
guchar *dest, *dp;
|
||||
guchar *data;
|
||||
guint *buf, *b;
|
||||
gint pixels;
|
||||
gint total;
|
||||
gint i, row, col;
|
||||
gint start, end;
|
||||
gint *curve;
|
||||
gint *sum;
|
||||
gint val;
|
||||
gint length;
|
||||
gint alpha;
|
||||
gint initial_p;
|
||||
gint initial_m;
|
||||
|
||||
if (radius_x == 0.0 && radius_y == 0.0)
|
||||
return;
|
||||
|
||||
/* allocate the result buffer */
|
||||
length = MAX (srcR->w, srcR->h) * srcR->bytes;
|
||||
data = g_new (guchar, length * 2);
|
||||
src = data;
|
||||
dest = data + length;
|
||||
|
||||
width = srcR->w;
|
||||
height = srcR->h;
|
||||
bytes = srcR->bytes;
|
||||
alpha = bytes - 1;
|
||||
|
||||
buf = g_new (guint, MAX (width, height) * 2);
|
||||
|
||||
if (radius_y != 0.0)
|
||||
{
|
||||
curve = make_curve (- SQR (radius_y) / (2 * LOG_1_255), &length);
|
||||
|
||||
sum = g_new (gint, 2 * length + 1);
|
||||
sum[0] = 0;
|
||||
|
||||
for (i = 1; i <= length * 2; i++)
|
||||
sum[i] = curve[i - length - 1] + sum[i - 1];
|
||||
|
||||
sum += length;
|
||||
|
||||
total = sum[length] - sum[-length];
|
||||
|
||||
for (col = 0; col < width; col++)
|
||||
{
|
||||
pixel_region_get_col (srcR, col + srcR->x, srcR->y, height, src, 1);
|
||||
sp = src + alpha;
|
||||
|
||||
initial_p = sp[0];
|
||||
initial_m = sp[(height - 1) * bytes];
|
||||
|
||||
/* Determine a run-length encoded version of the column */
|
||||
run_length_encode (sp, buf, height, bytes);
|
||||
|
||||
for (row = 0; row < height; row++)
|
||||
{
|
||||
start = (row < length) ? -row : -length;
|
||||
end = (height <= (row + length)) ? (height - row - 1) : length;
|
||||
|
||||
val = total / 2;
|
||||
i = start;
|
||||
b = buf + (row + i) * 2;
|
||||
|
||||
if (start != -length)
|
||||
val += initial_p * (sum[start] - sum[-length]);
|
||||
|
||||
while (i < end)
|
||||
{
|
||||
pixels = b[0];
|
||||
i += pixels;
|
||||
if (i > end)
|
||||
i = end;
|
||||
val += b[1] * (sum[i] - sum[start]);
|
||||
b += (pixels * 2);
|
||||
start = i;
|
||||
}
|
||||
|
||||
if (end != length)
|
||||
val += initial_m * (sum[length] - sum[end]);
|
||||
|
||||
sp[row * bytes] = val / total;
|
||||
}
|
||||
|
||||
pixel_region_set_col (srcR, col + srcR->x, srcR->y, height, src);
|
||||
}
|
||||
|
||||
g_free (sum - length);
|
||||
g_free (curve - length);
|
||||
}
|
||||
|
||||
if (radius_x != 0.0)
|
||||
{
|
||||
curve = make_curve (- SQR (radius_x) / (2 * LOG_1_255), &length);
|
||||
|
||||
sum = g_new (gint, 2 * length + 1);
|
||||
sum[0] = 0;
|
||||
|
||||
for (i = 1; i <= length * 2; i++)
|
||||
sum[i] = curve[i - length - 1] + sum[i - 1];
|
||||
|
||||
sum += length;
|
||||
|
||||
total = sum[length] - sum[-length];
|
||||
|
||||
for (row = 0; row < height; row++)
|
||||
{
|
||||
pixel_region_get_row (srcR, srcR->x, row + srcR->y, width, src, 1);
|
||||
sp = src + alpha;
|
||||
dp = dest + alpha;
|
||||
|
||||
initial_p = sp[0];
|
||||
initial_m = sp[(width - 1) * bytes];
|
||||
|
||||
/* Determine a run-length encoded version of the row */
|
||||
run_length_encode (sp, buf, width, bytes);
|
||||
|
||||
for (col = 0; col < width; col++)
|
||||
{
|
||||
start = (col < length) ? -col : -length;
|
||||
end = (width <= (col + length)) ? (width - col - 1) : length;
|
||||
|
||||
val = total / 2;
|
||||
i = start;
|
||||
b = buf + (col + i) * 2;
|
||||
|
||||
if (start != -length)
|
||||
val += initial_p * (sum[start] - sum[-length]);
|
||||
|
||||
while (i < end)
|
||||
{
|
||||
pixels = b[0];
|
||||
|
||||
i += pixels;
|
||||
|
||||
if (i > end)
|
||||
i = end;
|
||||
|
||||
val += b[1] * (sum[i] - sum[start]);
|
||||
b += (pixels * 2);
|
||||
start = i;
|
||||
}
|
||||
|
||||
if (end != length)
|
||||
val += initial_m * (sum[length] - sum[end]);
|
||||
|
||||
val = val / total;
|
||||
|
||||
dp[col * bytes] = val;
|
||||
}
|
||||
|
||||
pixel_region_set_row (srcR, srcR->x, row + srcR->y, width, dest);
|
||||
}
|
||||
|
||||
g_free (sum - length);
|
||||
g_free (curve - length);
|
||||
}
|
||||
|
||||
g_free (data);
|
||||
g_free (buf);
|
||||
}
|
||||
|
||||
static inline void
|
||||
rotate_pointers (guchar **p,
|
||||
guint32 n)
|
||||
|
|
|
|||
|
|
@ -400,10 +400,6 @@ void multiply_alpha_region (PixelRegion *srcR);
|
|||
|
||||
void separate_alpha_region (PixelRegion *srcR);
|
||||
|
||||
void gaussian_blur_region (PixelRegion *srcR,
|
||||
gdouble radius_x,
|
||||
gdouble radius_y);
|
||||
|
||||
void border_region (PixelRegion *src,
|
||||
gint16 xradius,
|
||||
gint16 yradius,
|
||||
|
|
|
|||
Loading…
Reference in New Issue