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normalmap.c
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/*
normalmap GIMP plugin
Copyright (C) 2002-2012 Shawn Kirst <skirst@gmail.com>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; see the file COPYING. If not, write to
the Free Software Foundation, 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301 USA.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <gtk/gtk.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "scale.h"
#include "preview3d.h"
#define PREVIEW_SIZE 150
enum FILTER_TYPE
{
FILTER_NONE = 0, FILTER_SOBEL_3x3, FILTER_SOBEL_5x5, FILTER_PREWITT_3x3,
FILTER_PREWITT_5x5, FILTER_3x3, FILTER_5x5, FILTER_7x7, FILTER_9x9,
MAX_FILTER_TYPE
};
enum ALPHA_TYPE
{
ALPHA_NONE = 0, ALPHA_HEIGHT, ALPHA_INVERSE_HEIGHT, ALPHA_ZERO, ALPHA_ONE,
ALPHA_INVERT, ALPHA_MAP, MAX_ALPHA_TYPE
};
enum CONVERSION_TYPE
{
CONVERT_NONE = 0, CONVERT_BIASED_RGB, CONVERT_RED, CONVERT_GREEN,
CONVERT_BLUE, CONVERT_MAX_RGB, CONVERT_MIN_RGB, CONVERT_COLORSPACE,
CONVERT_NORMALIZE_ONLY, CONVERT_DUDV_TO_NORMAL, CONVERT_HEIGHTMAP,
MAX_CONVERSION_TYPE
};
enum DUDV_TYPE
{
DUDV_NONE, DUDV_8BIT_SIGNED, DUDV_8BIT_UNSIGNED, DUDV_16BIT_SIGNED,
DUDV_16BIT_UNSIGNED,
MAX_DUDV_TYPE
};
typedef struct
{
gint filter;
gdouble minz;
gdouble scale;
gint wrap;
gint height_source;
gint alpha;
gint conversion;
gint dudv;
gint xinvert;
gint yinvert;
gint swapRGB;
gdouble contrast;
gint32 alphamap_id;
} NormalmapVals;
static void query(void);
static void run(const gchar *name, gint params, const GimpParam *param,
gint *nreturn_vals, GimpParam **return_vals);
static gint32 normalmap(GimpDrawable *drawable, gboolean preview_mode);
static gint normalmap_dialog(GimpDrawable *drawable);
GimpPlugInInfo PLUG_IN_INFO =
{
0, 0, query, run
};
NormalmapVals nmapvals =
{
.filter = 0,
.minz = 0.0,
.scale = 1.0,
.wrap = 0,
.height_source = 0,
.alpha = ALPHA_NONE,
.conversion = CONVERT_NONE,
.dudv = DUDV_NONE,
.xinvert = 0,
.yinvert = 0,
.swapRGB = 0,
.contrast = 0.0,
.alphamap_id = 0
};
static const float oneover255 = 1.0f / 255.0f;
gint runme = 0;
static GtkWidget *dialog;
static GtkWidget *preview;
static GtkWidget *btn3DP;
MAIN()
static void query(void)
{
static GimpParamDef args[]=
{
{GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive"},
{GIMP_PDB_IMAGE, "image", "Input image (unused)"},
{GIMP_PDB_DRAWABLE, "drawable", "Input drawable"},
{GIMP_PDB_INT32, "filter", "Filter type (0 = 4 sample, 1 = sobel 3x3, 2 = sobel 5x5, 3 = prewitt 3x3, 4 = prewitt 5x5, 5-8 = 3x3,5x5,7x7,9x9)"},
{GIMP_PDB_FLOAT, "minz", "Minimun Z (0 to 1)"},
{GIMP_PDB_FLOAT, "scale", "Scale (>0)"},
{GIMP_PDB_INT32, "wrap", "Wrap (0 = no)"},
{GIMP_PDB_INT32, "height_source", "Height source (0 = average RGB, 1 = alpha channel)"},
{GIMP_PDB_INT32, "alpha", "Alpha (0 = unchanged, 1 = set to height, 2 = set to inverse height, 3 = set to 0, 4 = set to 1, 5 = invert, 6 = set to alpha map value)"},
{GIMP_PDB_INT32, "conversion", "Conversion (0 = normalize only, 1 = Biased RGB, 2 = Red, 3 = Green, 4 = Blue, 5 = Max RGB, 6 = Min RGB, 7 = Colorspace, 8 = Normalize only, 9 = Convert to height map)"},
{GIMP_PDB_INT32, "dudv", "DU/DV map (0 = none, 1 = 8-bit, 2 = 8-bit unsigned, 3 = 16-bit, 4 = 16-bit unsigned)"},
{GIMP_PDB_INT32, "xinvert", "Invert X component of normal"},
{GIMP_PDB_INT32, "yinvert", "Invert Y component of normal"},
{GIMP_PDB_INT32, "swapRGB", "Swap RGB components"},
{GIMP_PDB_FLOAT, "contrast", "Height contrast (0 to 1). If converting to a height map, this value is applied to the results"},
{GIMP_PDB_DRAWABLE, "alphamap", "Alpha map drawable"}
};
static gint nargs = sizeof(args) / sizeof(args[0]);
gimp_install_procedure("plug_in_normalmap",
"Converts image to an RGB normalmap",
"foo!",
"Shawn Kirst",
"Shawn Kirst",
"February 2002",
"<Image>/Filters/Map/Normalmap...",
"RGB*",
GIMP_PLUGIN,
nargs, 0,
args, NULL);
}
static void run(const gchar *name, gint nparams, const GimpParam *param,
gint *nreturn_vals, GimpParam **return_vals)
{
static GimpParam values[1];
GimpDrawable *drawable;
GimpRunMode run_mode;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
run_mode = param[0].data.d_int32;
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
drawable = gimp_drawable_get(param[2].data.d_drawable);
switch(run_mode)
{
case GIMP_RUN_INTERACTIVE:
gimp_ui_init("normalmap", 0);
gimp_get_data("plug_in_normalmap", &nmapvals);
if(!normalmap_dialog(drawable))
{
gimp_drawable_detach(drawable);
return;
}
break;
case GIMP_RUN_NONINTERACTIVE:
if(nparams != 16)
status=GIMP_PDB_CALLING_ERROR;
else
{
nmapvals.filter = param[3].data.d_int32;
nmapvals.minz = param[4].data.d_float;
nmapvals.scale = param[5].data.d_float;
nmapvals.wrap = param[6].data.d_int32;
nmapvals.height_source = param[7].data.d_int32;
nmapvals.alpha = param[8].data.d_int32;
nmapvals.conversion = param[9].data.d_int32;
nmapvals.dudv = param[10].data.d_int32;
nmapvals.xinvert = param[11].data.d_int32;
nmapvals.yinvert = param[12].data.d_int32;
nmapvals.swapRGB = param[13].data.d_int32;
nmapvals.contrast = param[14].data.d_float;
nmapvals.alphamap_id = param[15].data.d_int32;
if(nmapvals.alphamap_id != 0)
nmapvals.alphamap_id = gimp_drawable_get(param[15].data.d_drawable)->drawable_id;
}
break;
case GIMP_RUN_WITH_LAST_VALS:
gimp_get_data("plug_in_normalmap", &nmapvals);
break;
default:
break;
}
gimp_progress_init("Creating normalmap...");
if(normalmap(drawable,FALSE) == -1)
status = GIMP_PDB_EXECUTION_ERROR;
gimp_progress_end();
if(run_mode != GIMP_RUN_NONINTERACTIVE)
gimp_displays_flush();
if(run_mode == GIMP_RUN_INTERACTIVE)
gimp_set_data("plug_in_normalmap", &nmapvals, sizeof(nmapvals));
values[0].data.d_status = status;
gimp_drawable_detach(drawable);
}
#ifndef min
# ifdef __GNUC__
# define min(a,b) ({typeof(a) _a = (a); typeof(b) _b = (b); _a < _b ? _a : _b;})
# else
# define min(a,b) ((a)<(b) ? (a) : (b))
# endif
#endif
#ifndef max
# ifdef __GNUC__
# define max(a,b) ({typeof(a) _a = (a); typeof(b) _b = (b); _a > _b ? _a : _b;})
# else
# define max(a,b) ((a)>(b) ? (a) : (b))
# endif
#endif
#define SQR(x) ((x) * (x))
#define LERP(a,b,c) ((a) + ((b) - (a)) * (c))
static inline void NORMALIZE(float *v)
{
float len = sqrtf(SQR(v[0]) + SQR(v[1]) + SQR(v[2]));
if(len > 1e-04f)
{
len = 1.0f / len;
v[0] *= len;
v[1] *= len;
v[2] *= len;
}
else
v[0] = v[1] = v[2] = 0;
}
typedef struct
{
int x,y;
float w;
} kernel_element;
static void make_kernel(kernel_element *k, float *weights, int size)
{
int x, y, idx;
for(y = 0; y < size; ++y)
{
for(x = 0; x < size; ++x)
{
idx = x + y * size;
k[idx].x = x - (size / 2);
k[idx].y = (size / 2) - y;
k[idx].w = weights[idx];
}
}
}
static void rotate_array(float *dst, float *src, int size)
{
int x, y, newx, newy;
for(y = 0; y < size; ++y)
{
for(x = 0; x < size; ++x)
{
newy = size - x - 1;
newx = y;
dst[newx + newy * size] = src[x + y * size];
}
}
}
static int sample_alpha_map(unsigned char *pixels, int x, int y,
int w, int h, int sw, int sh)
{
int ix, iy, wx, wy, v;
int a, b, c, d;
unsigned char *s;
if(sh > 1)
{
iy = (((h - 1) * y) << 7) / (sh - 1);
if(y == sh - 1) --iy;
wy = iy & 0x7f;
iy >>= 7;
}
else
iy = wy = 0;
if(sw > 1)
{
ix = (((w - 1) * x) << 7) / (sw - 1);
if(x == sw - 1) --ix;
wx = ix & 0x7f;
ix >>= 7;
}
else
ix = wx = 0;
s = pixels + ((iy - 1) * w + (ix - 1));
b = icerp(s[w + 0],
s[w + 1],
s[w + 2],
s[w + 3], wx);
if(iy > 0)
{
a = icerp(s[0],
s[1],
s[2],
s[3], wx);
}
else
a = b;
c = icerp(s[2 * w + 0],
s[2 * w + 1],
s[2 * w + 2],
s[2 * w + 3], wx);
if(iy < sh - 1)
{
d = icerp(s[3 * w + 0],
s[3 * w + 1],
s[3 * w + 2],
s[3 * w + 3], wx);
}
else
d = c;
v = icerp(a, b, c, d, wy);
if(v < 0) v = 0;
if(v > 255) v = 255;
return((unsigned char)v);
}
static void make_heightmap(unsigned char *image, int w, int h, int bpp)
{
unsigned int i, num_pixels = w * h;
int x, y;
float v, hmin, hmax;
float *s, *r;
s = (float*)g_malloc(w * h * 3 * sizeof(float));
if(s == 0)
{
g_message("Memory allocation error!");
return;
}
r = (float*)g_malloc(w * h * 4 * sizeof(float));
if(r == 0)
{
g_free(s);
g_message("Memory allocation error!");
return;
}
/* scale into 0 to 1 range, make signed -1 to 1 */
for(i = 0; i < num_pixels; ++i)
{
s[3 * i + 0] = (((float)image[bpp * i + 0] / 255.0f) - 0.5) * 2.0f;
s[3 * i + 1] = (((float)image[bpp * i + 1] / 255.0f) - 0.5) * 2.0f;
s[3 * i + 2] = (((float)image[bpp * i + 2] / 255.0f) - 0.5) * 2.0f;
}
memset(r, 0, w * h * 4 * sizeof(float));
#define S(x, y, n) s[(y) * (w * 3) + ((x) * 3) + (n)]
#define R(x, y, n) r[(y) * (w * 4) + ((x) * 4) + (n)]
/* top-left to bottom-right */
for(x = 1; x < w; ++x)
R(x, 0, 0) = R(x - 1, 0, 0) + S(x - 1, 0, 0);
for(y = 1; y < h; ++y)
R(0, y, 0) = R(0, y - 1, 0) + S(0, y - 1, 1);
for(y = 1; y < h; ++y)
{
for(x = 1; x < w; ++x)
{
R(x, y, 0) = (R(x, y - 1, 0) + R(x - 1, y, 0) +
S(x - 1, y, 0) + S(x, y - 1, 1)) * 0.5f;
}
}
/* top-right to bottom-left */
for(x = w - 2; x >= 0; --x)
R(x, 0, 1) = R(x + 1, 0, 1) - S(x + 1, 0, 0);
for(y = 1; y < h; ++y)
R(0, y, 1) = R(0, y - 1, 1) + S(0, y - 1, 1);
for(y = 1; y < h; ++y)
{
for(x = w - 2; x >= 0; --x)
{
R(x, y, 1) = (R(x, y - 1, 1) + R(x + 1, y, 1) -
S(x + 1, y, 0) + S(x, y - 1, 1)) * 0.5f;
}
}
/* bottom-left to top-right */
for(x = 1; x < w; ++x)
R(x, 0, 2) = R(x - 1, 0, 2) + S(x - 1, 0, 0);
for(y = h - 2; y >= 0; --y)
R(0, y, 2) = R(0, y + 1, 2) - S(0, y + 1, 1);
for(y = h - 2; y >= 0; --y)
{
for(x = 1; x < w; ++x)
{
R(x, y, 2) = (R(x, y + 1, 2) + R(x - 1, y, 2) +
S(x - 1, y, 0) - S(x, y + 1, 1)) * 0.5f;
}
}
/* bottom-right to top-left */
for(x = w - 2; x >= 0; --x)
R(x, 0, 3) = R(x + 1, 0, 3) - S(x + 1, 0, 0);
for(y = h - 2; y >= 0; --y)
R(0, y, 3) = R(0, y + 1, 3) - S(0, y + 1, 1);
for(y = h - 2; y >= 0; --y)
{
for(x = w - 2; x >= 0; --x)
{
R(x, y, 3) = (R(x, y + 1, 3) + R(x + 1, y, 3) -
S(x + 1, y, 0) - S(x, y + 1, 1)) * 0.5f;
}
}
#undef S
#undef R
/* accumulate, find min/max */
hmin = 1e10f;
hmax = -1e10f;
for(i = 0; i < num_pixels; ++i)
{
r[4 * i] += r[4 * i + 1] + r[4 * i + 2] + r[4 * i + 3];
if(r[4 * i] < hmin) hmin = r[4 * i];
if(r[4 * i] > hmax) hmax = r[4 * i];
}
/* scale into 0 - 1 range */
for(i = 0; i < num_pixels; ++i)
{
v = (r[4 * i] - hmin) / (hmax - hmin);
/* adjust contrast */
v = (v - 0.5f) * nmapvals.contrast + v;
if(v < 0) v = 0;
if(v > 1) v = 1;
r[4 * i] = v;
}
/* write out results */
for(i = 0; i < num_pixels; ++i)
{
v = r[4 * i] * 255.0f;
image[bpp * i + 0] = (unsigned char)v;
image[bpp * i + 1] = (unsigned char)v;
image[bpp * i + 2] = (unsigned char)v;
}
g_free(s);
g_free(r);
}
static gint32 normalmap(GimpDrawable *drawable, gboolean preview_mode)
{
gint x, y;
gint width, height, bpp, rowbytes, pw, ph, amap_w = 0, amap_h = 0;
guchar *d, *dst, *s, *src, *tmp, *amap = 0;
float *heights;
float val, du, dv, n[3], weight;
float rgb_bias[3];
int i, num_elements = 0;
kernel_element *kernel_du = 0;
kernel_element *kernel_dv = 0;
GimpPixelRgn src_rgn, dst_rgn, amap_rgn;
GdkCursor *cursor = 0;
if(nmapvals.filter < 0 || nmapvals.filter >= MAX_FILTER_TYPE)
nmapvals.filter = FILTER_NONE;
if(drawable->bpp != 4) nmapvals.height_source = 0;
if(drawable->bpp != 4 && (nmapvals.dudv == DUDV_16BIT_SIGNED ||
nmapvals.dudv == DUDV_16BIT_UNSIGNED))
nmapvals.dudv = DUDV_NONE;
width = drawable->width;
height = drawable->height;
bpp = drawable->bpp;
rowbytes = width * bpp;
dst = g_malloc(width * height * bpp);
if(dst == 0)
{
g_message("Memory allocation error!");
return(-1);
}
src = g_malloc(width * height * bpp);
if(src == 0)
{
g_message("Memory allocation error!");
return(-1);
}
heights = g_new(float, width * height);
if(heights == 0)
{
g_message("Memory allocation error!");
return(-1);
}
if(!nmapvals.dudv && drawable->bpp == 4 && nmapvals.alpha == ALPHA_MAP &&
nmapvals.alphamap_id != 0)
{
GimpDrawable *alphamap = gimp_drawable_get(nmapvals.alphamap_id);
amap_w = alphamap->width;
amap_h = alphamap->height;
amap = g_malloc(amap_w * amap_h);
gimp_pixel_rgn_init(&amap_rgn, alphamap, 0, 0, amap_w, amap_h, 0, 0);
gimp_pixel_rgn_get_rect(&amap_rgn, amap, 0, 0, amap_w, amap_h);
}
gimp_pixel_rgn_init(&src_rgn, drawable, 0, 0, width, height, 0, 0);
gimp_pixel_rgn_get_rect(&src_rgn, src, 0, 0, width, height);
switch(nmapvals.filter)
{
case FILTER_NONE:
num_elements = 2;
kernel_du = (kernel_element*)g_malloc(2 * sizeof(kernel_element));
kernel_dv = (kernel_element*)g_malloc(2 * sizeof(kernel_element));
kernel_du[0].x = -1; kernel_du[0].y = 0; kernel_du[0].w = -0.5f;
kernel_du[1].x = 1; kernel_du[1].y = 0; kernel_du[1].w = 0.5f;
kernel_dv[0].x = 0; kernel_dv[0].y = 1; kernel_dv[0].w = 0.5f;
kernel_dv[1].x = 0; kernel_dv[1].y = -1; kernel_dv[1].w = -0.5f;
break;
case FILTER_SOBEL_3x3:
num_elements = 6;
kernel_du = (kernel_element*)g_malloc(6 * sizeof(kernel_element));
kernel_dv = (kernel_element*)g_malloc(6 * sizeof(kernel_element));
kernel_du[0].x = -1; kernel_du[0].y = 1; kernel_du[0].w = -1.0f;
kernel_du[1].x = -1; kernel_du[1].y = 0; kernel_du[1].w = -2.0f;
kernel_du[2].x = -1; kernel_du[2].y = -1; kernel_du[2].w = -1.0f;
kernel_du[3].x = 1; kernel_du[3].y = 1; kernel_du[3].w = 1.0f;
kernel_du[4].x = 1; kernel_du[4].y = 0; kernel_du[4].w = 2.0f;
kernel_du[5].x = 1; kernel_du[5].y = -1; kernel_du[5].w = 1.0f;
kernel_dv[0].x = -1; kernel_dv[0].y = 1; kernel_dv[0].w = 1.0f;
kernel_dv[1].x = 0; kernel_dv[1].y = 1; kernel_dv[1].w = 2.0f;
kernel_dv[2].x = 1; kernel_dv[2].y = 1; kernel_dv[2].w = 1.0f;
kernel_dv[3].x = -1; kernel_dv[3].y = -1; kernel_dv[3].w = -1.0f;
kernel_dv[4].x = 0; kernel_dv[4].y = -1; kernel_dv[4].w = -2.0f;
kernel_dv[5].x = 1; kernel_dv[5].y = -1; kernel_dv[5].w = -1.0f;
break;
case FILTER_SOBEL_5x5:
num_elements = 20;
kernel_du = (kernel_element*)g_malloc(20 * sizeof(kernel_element));
kernel_dv = (kernel_element*)g_malloc(20 * sizeof(kernel_element));
kernel_du[ 0].x = -2; kernel_du[ 0].y = 2; kernel_du[ 0].w = -1.0f;
kernel_du[ 1].x = -2; kernel_du[ 1].y = 1; kernel_du[ 1].w = -4.0f;
kernel_du[ 2].x = -2; kernel_du[ 2].y = 0; kernel_du[ 2].w = -6.0f;
kernel_du[ 3].x = -2; kernel_du[ 3].y = -1; kernel_du[ 3].w = -4.0f;
kernel_du[ 4].x = -2; kernel_du[ 4].y = -2; kernel_du[ 4].w = -1.0f;
kernel_du[ 5].x = -1; kernel_du[ 5].y = 2; kernel_du[ 5].w = -2.0f;
kernel_du[ 6].x = -1; kernel_du[ 6].y = 1; kernel_du[ 6].w = -8.0f;
kernel_du[ 7].x = -1; kernel_du[ 7].y = 0; kernel_du[ 7].w = -12.0f;
kernel_du[ 8].x = -1; kernel_du[ 8].y = -1; kernel_du[ 8].w = -8.0f;
kernel_du[ 9].x = -1; kernel_du[ 9].y = -2; kernel_du[ 9].w = -2.0f;
kernel_du[10].x = 1; kernel_du[10].y = 2; kernel_du[10].w = 2.0f;
kernel_du[11].x = 1; kernel_du[11].y = 1; kernel_du[11].w = 8.0f;
kernel_du[12].x = 1; kernel_du[12].y = 0; kernel_du[12].w = 12.0f;
kernel_du[13].x = 1; kernel_du[13].y = -1; kernel_du[13].w = 8.0f;
kernel_du[14].x = 1; kernel_du[14].y = -2; kernel_du[14].w = 2.0f;
kernel_du[15].x = 2; kernel_du[15].y = 2; kernel_du[15].w = 1.0f;
kernel_du[16].x = 2; kernel_du[16].y = 1; kernel_du[16].w = 4.0f;
kernel_du[17].x = 2; kernel_du[17].y = 0; kernel_du[17].w = 6.0f;
kernel_du[18].x = 2; kernel_du[18].y = -1; kernel_du[18].w = 4.0f;
kernel_du[19].x = 2; kernel_du[19].y = -2; kernel_du[19].w = 1.0f;
kernel_dv[ 0].x = -2; kernel_dv[ 0].y = 2; kernel_dv[ 0].w = 1.0f;
kernel_dv[ 1].x = -1; kernel_dv[ 1].y = 2; kernel_dv[ 1].w = 4.0f;
kernel_dv[ 2].x = 0; kernel_dv[ 2].y = 2; kernel_dv[ 2].w = 6.0f;
kernel_dv[ 3].x = 1; kernel_dv[ 3].y = 2; kernel_dv[ 3].w = 4.0f;
kernel_dv[ 4].x = 2; kernel_dv[ 4].y = 2; kernel_dv[ 4].w = 1.0f;
kernel_dv[ 5].x = -2; kernel_dv[ 5].y = 1; kernel_dv[ 5].w = 2.0f;
kernel_dv[ 6].x = -1; kernel_dv[ 6].y = 1; kernel_dv[ 6].w = 8.0f;
kernel_dv[ 7].x = 0; kernel_dv[ 7].y = 1; kernel_dv[ 7].w = 12.0f;
kernel_dv[ 8].x = 1; kernel_dv[ 8].y = 1; kernel_dv[ 8].w = 8.0f;
kernel_dv[ 9].x = 2; kernel_dv[ 9].y = 1; kernel_dv[ 9].w = 2.0f;
kernel_dv[10].x = -2; kernel_dv[10].y = -1; kernel_dv[10].w = -2.0f;
kernel_dv[11].x = -1; kernel_dv[11].y = -1; kernel_dv[11].w = -8.0f;
kernel_dv[12].x = 0; kernel_dv[12].y = -1; kernel_dv[12].w = -12.0f;
kernel_dv[13].x = 1; kernel_dv[13].y = -1; kernel_dv[13].w = -8.0f;
kernel_dv[14].x = 2; kernel_dv[14].y = -1; kernel_dv[14].w = -2.0f;
kernel_dv[15].x = -2; kernel_dv[15].y = -2; kernel_dv[15].w = -1.0f;
kernel_dv[16].x = -1; kernel_dv[16].y = -2; kernel_dv[16].w = -4.0f;
kernel_dv[17].x = 0; kernel_dv[17].y = -2; kernel_dv[17].w = -6.0f;
kernel_dv[18].x = 1; kernel_dv[18].y = -2; kernel_dv[18].w = -4.0f;
kernel_dv[19].x = 2; kernel_dv[19].y = -2; kernel_dv[19].w = -1.0f;
break;
case FILTER_PREWITT_3x3:
num_elements = 6;
kernel_du = (kernel_element*)g_malloc(6 * sizeof(kernel_element));
kernel_dv = (kernel_element*)g_malloc(6 * sizeof(kernel_element));
kernel_du[0].x = -1; kernel_du[0].y = 1; kernel_du[0].w = -1.0f;
kernel_du[1].x = -1; kernel_du[1].y = 0; kernel_du[1].w = -1.0f;
kernel_du[2].x = -1; kernel_du[2].y = -1; kernel_du[2].w = -1.0f;
kernel_du[3].x = 1; kernel_du[3].y = 1; kernel_du[3].w = 1.0f;
kernel_du[4].x = 1; kernel_du[4].y = 0; kernel_du[4].w = 1.0f;
kernel_du[5].x = 1; kernel_du[5].y = -1; kernel_du[5].w = 1.0f;
kernel_dv[0].x = -1; kernel_dv[0].y = 1; kernel_dv[0].w = 1.0f;
kernel_dv[1].x = 0; kernel_dv[1].y = 1; kernel_dv[1].w = 1.0f;
kernel_dv[2].x = 1; kernel_dv[2].y = 1; kernel_dv[2].w = 1.0f;
kernel_dv[3].x = -1; kernel_dv[3].y = -1; kernel_dv[3].w = -1.0f;
kernel_dv[4].x = 0; kernel_dv[4].y = -1; kernel_dv[4].w = -1.0f;
kernel_dv[5].x = 1; kernel_dv[5].y = -1; kernel_dv[5].w = -1.0f;
break;
case FILTER_PREWITT_5x5:
num_elements = 20;
kernel_du = (kernel_element*)g_malloc(20 * sizeof(kernel_element));
kernel_dv = (kernel_element*)g_malloc(20 * sizeof(kernel_element));
kernel_du[ 0].x = -2; kernel_du[ 0].y = 2; kernel_du[ 0].w = -1.0f;
kernel_du[ 1].x = -2; kernel_du[ 1].y = 1; kernel_du[ 1].w = -1.0f;
kernel_du[ 2].x = -2; kernel_du[ 2].y = 0; kernel_du[ 2].w = -1.0f;
kernel_du[ 3].x = -2; kernel_du[ 3].y = -1; kernel_du[ 3].w = -1.0f;
kernel_du[ 4].x = -2; kernel_du[ 4].y = -2; kernel_du[ 4].w = -1.0f;
kernel_du[ 5].x = -1; kernel_du[ 5].y = 2; kernel_du[ 5].w = -2.0f;
kernel_du[ 6].x = -1; kernel_du[ 6].y = 1; kernel_du[ 6].w = -2.0f;
kernel_du[ 7].x = -1; kernel_du[ 7].y = 0; kernel_du[ 7].w = -2.0f;
kernel_du[ 8].x = -1; kernel_du[ 8].y = -1; kernel_du[ 8].w = -2.0f;
kernel_du[ 9].x = -1; kernel_du[ 9].y = -2; kernel_du[ 9].w = -2.0f;
kernel_du[10].x = 1; kernel_du[10].y = 2; kernel_du[10].w = 2.0f;
kernel_du[11].x = 1; kernel_du[11].y = 1; kernel_du[11].w = 2.0f;
kernel_du[12].x = 1; kernel_du[12].y = 0; kernel_du[12].w = 2.0f;
kernel_du[13].x = 1; kernel_du[13].y = -1; kernel_du[13].w = 2.0f;
kernel_du[14].x = 1; kernel_du[14].y = -2; kernel_du[14].w = 2.0f;
kernel_du[15].x = 2; kernel_du[15].y = 2; kernel_du[15].w = 1.0f;
kernel_du[16].x = 2; kernel_du[16].y = 1; kernel_du[16].w = 1.0f;
kernel_du[17].x = 2; kernel_du[17].y = 0; kernel_du[17].w = 1.0f;
kernel_du[18].x = 2; kernel_du[18].y = -1; kernel_du[18].w = 1.0f;
kernel_du[19].x = 2; kernel_du[19].y = -2; kernel_du[19].w = 1.0f;
kernel_dv[ 0].x = -2; kernel_dv[ 0].y = 2; kernel_dv[ 0].w = 1.0f;
kernel_dv[ 1].x = -1; kernel_dv[ 1].y = 2; kernel_dv[ 1].w = 1.0f;
kernel_dv[ 2].x = 0; kernel_dv[ 2].y = 2; kernel_dv[ 2].w = 1.0f;
kernel_dv[ 3].x = 1; kernel_dv[ 3].y = 2; kernel_dv[ 3].w = 1.0f;
kernel_dv[ 4].x = 2; kernel_dv[ 4].y = 2; kernel_dv[ 4].w = 1.0f;
kernel_dv[ 5].x = -2; kernel_dv[ 5].y = 1; kernel_dv[ 5].w = 2.0f;
kernel_dv[ 6].x = -1; kernel_dv[ 6].y = 1; kernel_dv[ 6].w = 2.0f;
kernel_dv[ 7].x = 0; kernel_dv[ 7].y = 1; kernel_dv[ 7].w = 2.0f;
kernel_dv[ 8].x = 1; kernel_dv[ 8].y = 1; kernel_dv[ 8].w = 2.0f;
kernel_dv[ 9].x = 2; kernel_dv[ 9].y = 1; kernel_dv[ 9].w = 2.0f;
kernel_dv[10].x = -2; kernel_dv[10].y = -1; kernel_dv[10].w = -2.0f;
kernel_dv[11].x = -1; kernel_dv[11].y = -1; kernel_dv[11].w = -2.0f;
kernel_dv[12].x = 0; kernel_dv[12].y = -1; kernel_dv[12].w = -2.0f;
kernel_dv[13].x = 1; kernel_dv[13].y = -1; kernel_dv[13].w = -2.0f;
kernel_dv[14].x = 2; kernel_dv[14].y = -1; kernel_dv[14].w = -2.0f;
kernel_dv[15].x = -2; kernel_dv[15].y = -2; kernel_dv[15].w = -1.0f;
kernel_dv[16].x = -1; kernel_dv[16].y = -2; kernel_dv[16].w = -1.0f;
kernel_dv[17].x = 0; kernel_dv[17].y = -2; kernel_dv[17].w = -1.0f;
kernel_dv[18].x = 1; kernel_dv[18].y = -2; kernel_dv[18].w = -1.0f;
kernel_dv[19].x = 2; kernel_dv[19].y = -2; kernel_dv[19].w = -1.0f;
break;
case FILTER_3x3:
num_elements = 6;
kernel_du = (kernel_element*)g_malloc(6 * sizeof(kernel_element));
kernel_dv = (kernel_element*)g_malloc(6 * sizeof(kernel_element));
weight = 1.0f / 6.0f;
kernel_du[0].x = -1; kernel_du[0].y = 1; kernel_du[0].w = -weight;
kernel_du[1].x = -1; kernel_du[1].y = 0; kernel_du[1].w = -weight;
kernel_du[2].x = -1; kernel_du[2].y = -1; kernel_du[2].w = -weight;
kernel_du[3].x = 1; kernel_du[3].y = 1; kernel_du[3].w = weight;
kernel_du[4].x = 1; kernel_du[4].y = 0; kernel_du[4].w = weight;
kernel_du[5].x = 1; kernel_du[5].y = -1; kernel_du[5].w = weight;
kernel_dv[0].x = -1; kernel_dv[0].y = 1; kernel_dv[0].w = weight;
kernel_dv[1].x = 0; kernel_dv[1].y = 1; kernel_dv[1].w = weight;
kernel_dv[2].x = 1; kernel_dv[2].y = 1; kernel_dv[2].w = weight;
kernel_dv[3].x = -1; kernel_dv[3].y = -1; kernel_dv[3].w = -weight;
kernel_dv[4].x = 0; kernel_dv[4].y = -1; kernel_dv[4].w = -weight;
kernel_dv[5].x = 1; kernel_dv[5].y = -1; kernel_dv[5].w = -weight;
break;
case FILTER_5x5:
{
int n;
float usum = 0, vsum = 0;
float wt22 = 1.0f / 16.0f;
float wt12 = 1.0f / 10.0f;
float wt02 = 1.0f / 8.0f;
float wt11 = 1.0f / 2.8f;
num_elements = 20;
kernel_du = (kernel_element*)g_malloc(20 * sizeof(kernel_element));
kernel_dv = (kernel_element*)g_malloc(20 * sizeof(kernel_element));
kernel_du[0 ].x = -2; kernel_du[0 ].y = 2; kernel_du[0 ].w = -wt22;
kernel_du[1 ].x = -1; kernel_du[1 ].y = 2; kernel_du[1 ].w = -wt12;
kernel_du[2 ].x = 1; kernel_du[2 ].y = 2; kernel_du[2 ].w = wt12;
kernel_du[3 ].x = 2; kernel_du[3 ].y = 2; kernel_du[3 ].w = wt22;
kernel_du[4 ].x = -2; kernel_du[4 ].y = 1; kernel_du[4 ].w = -wt12;
kernel_du[5 ].x = -1; kernel_du[5 ].y = 1; kernel_du[5 ].w = -wt11;
kernel_du[6 ].x = 1; kernel_du[6 ].y = 1; kernel_du[6 ].w = wt11;
kernel_du[7 ].x = 2; kernel_du[7 ].y = 1; kernel_du[7 ].w = wt12;
kernel_du[8 ].x = -2; kernel_du[8 ].y = 0; kernel_du[8 ].w = -wt02;
kernel_du[9 ].x = -1; kernel_du[9 ].y = 0; kernel_du[9 ].w = -0.5f;
kernel_du[10].x = 1; kernel_du[10].y = 0; kernel_du[10].w = 0.5f;
kernel_du[11].x = 2; kernel_du[11].y = 0; kernel_du[11].w = wt02;
kernel_du[12].x = -2; kernel_du[12].y = -1; kernel_du[12].w = -wt12;
kernel_du[13].x = -1; kernel_du[13].y = -1; kernel_du[13].w = -wt11;
kernel_du[14].x = 1; kernel_du[14].y = -1; kernel_du[14].w = wt11;
kernel_du[15].x = 2; kernel_du[15].y = -1; kernel_du[15].w = wt12;
kernel_du[16].x = -2; kernel_du[16].y = -2; kernel_du[16].w = -wt22;
kernel_du[17].x = -1; kernel_du[17].y = -2; kernel_du[17].w = -wt12;
kernel_du[18].x = 1; kernel_du[18].y = -2; kernel_du[18].w = wt12;
kernel_du[19].x = 2; kernel_du[19].y = -2; kernel_du[19].w = wt22;
kernel_dv[0 ].x = -2; kernel_dv[0 ].y = 2; kernel_dv[0 ].w = wt22;
kernel_dv[1 ].x = -1; kernel_dv[1 ].y = 2; kernel_dv[1 ].w = wt12;
kernel_dv[2 ].x = 0; kernel_dv[2 ].y = 2; kernel_dv[2 ].w = 0.25f;
kernel_dv[3 ].x = 1; kernel_dv[3 ].y = 2; kernel_dv[3 ].w = wt12;
kernel_dv[4 ].x = 2; kernel_dv[4 ].y = 2; kernel_dv[4 ].w = wt22;
kernel_dv[5 ].x = -2; kernel_dv[5 ].y = 1; kernel_dv[5 ].w = wt12;
kernel_dv[6 ].x = -1; kernel_dv[6 ].y = 1; kernel_dv[6 ].w = wt11;
kernel_dv[7 ].x = 0; kernel_dv[7 ].y = 1; kernel_dv[7 ].w = 0.5f;
kernel_dv[8 ].x = 1; kernel_dv[8 ].y = 1; kernel_dv[8 ].w = wt11;
kernel_dv[9 ].x = 2; kernel_dv[9 ].y = 1; kernel_dv[9 ].w = wt22;
kernel_dv[10].x = -2; kernel_dv[10].y = -1; kernel_dv[10].w = -wt22;
kernel_dv[11].x = -1; kernel_dv[11].y = -1; kernel_dv[11].w = -wt11;
kernel_dv[12].x = 0; kernel_dv[12].y = -1; kernel_dv[12].w = -0.5f;
kernel_dv[13].x = 1; kernel_dv[13].y = -1; kernel_dv[13].w = -wt11;
kernel_dv[14].x = 2; kernel_dv[14].y = -1; kernel_dv[14].w = -wt12;
kernel_dv[15].x = -2; kernel_dv[15].y = -2; kernel_dv[15].w = -wt22;
kernel_dv[16].x = -1; kernel_dv[16].y = -2; kernel_dv[16].w = -wt12;
kernel_dv[17].x = 0; kernel_dv[17].y = -2; kernel_dv[17].w = -0.25f;
kernel_dv[18].x = 1; kernel_dv[18].y = -2; kernel_dv[18].w = -wt12;
kernel_dv[19].x = 2; kernel_dv[19].y = -2; kernel_dv[19].w = -wt22;
for(n = 0; n < 20; ++n)
{
usum += fabsf(kernel_du[n].w);
vsum += fabsf(kernel_dv[n].w);
}
for(n = 0; n < 20; ++n)
{
kernel_du[n].w /= usum;
kernel_dv[n].w /= vsum;
}
break;
}
case FILTER_7x7:
{
float du_weights[]=
{
-1, -2, -3, 0, 3, 2, 1,
-2, -3, -4, 0, 4, 3, 2,
-3, -4, -5, 0, 5, 4, 3,
-4, -5, -6, 0, 6, 5, 4,
-3, -4, -5, 0, 5, 4, 3,
-2, -3, -4, 0, 4, 3, 2,
-1, -2, -3, 0, 3, 2, 1
};
float dv_weights[49];
int n;
float usum = 0, vsum = 0;
num_elements = 49;
kernel_du = (kernel_element*)g_malloc(49 * sizeof(kernel_element));
kernel_dv = (kernel_element*)g_malloc(49 * sizeof(kernel_element));
make_kernel(kernel_du, du_weights, 7);
rotate_array(dv_weights, du_weights, 7);
make_kernel(kernel_dv, dv_weights, 7);
for(n = 0; n < 49; ++n)
{
usum += fabsf(kernel_du[n].w);
vsum += fabsf(kernel_dv[n].w);
}
for(n = 0; n < 49; ++n)
{
kernel_du[n].w /= usum;
kernel_dv[n].w /= vsum;
}
break;
}
case FILTER_9x9:
{
float du_weights[]=
{
-1, -2, -3, -4, 0, 4, 3, 2, 1,
-2, -3, -4, -5, 0, 5, 4, 3, 2,
-3, -4, -5, -6, 0, 6, 5, 4, 3,
-4, -5, -6, -7, 0, 7, 6, 5, 4,
-5, -6, -7, -8, 0, 8, 7, 6, 5,
-4, -5, -6, -7, 0, 7, 6, 5, 4,
-3, -4, -5, -6, 0, 6, 5, 4, 3,
-2, -3, -4, -5, 0, 5, 4, 3, 2,
-1, -2, -3, -4, 0, 4, 3, 2, 1
};
float dv_weights[81];
int n;
float usum = 0, vsum = 0;
num_elements = 81;
kernel_du = (kernel_element*)g_malloc(81 * sizeof(kernel_element));
kernel_dv = (kernel_element*)g_malloc(81 * sizeof(kernel_element));
make_kernel(kernel_du, du_weights, 9);
rotate_array(dv_weights, du_weights, 9);
make_kernel(kernel_dv, dv_weights, 9);
for(n = 0; n < 81; ++n)
{
usum += fabsf(kernel_du[n].w);
vsum += fabsf(kernel_dv[n].w);
}
for(n = 0; n < 81; ++n)
{
kernel_du[n].w /= usum;
kernel_dv[n].w /= vsum;
}
break;
}
}
if(nmapvals.conversion == CONVERT_BIASED_RGB)
{
/* approximated average color of the image
* scale to 16x16, accumulate the pixels and average */
unsigned int sum[3];
tmp = g_malloc(16 * 16 * bpp);
scale_pixels(tmp, 16, 16, src, width, height, bpp);
sum[0] = sum[1] = sum[2] = 0;
s = src;
for(y = 0; y < 16; ++y)
{
for(x = 0; x < 16; ++x)
{
sum[0] += *s++;
sum[1] += *s++;
sum[2] += *s++;
if(bpp == 4) s++;
}
}
rgb_bias[0] = (float)sum[0] / 256.0f;
rgb_bias[1] = (float)sum[1] / 256.0f;
rgb_bias[2] = (float)sum[2] / 256.0f;
g_free(tmp);
}
else
{
rgb_bias[0] = 0;
rgb_bias[1] = 0;
rgb_bias[2] = 0;
}
if(nmapvals.conversion != CONVERT_NORMALIZE_ONLY &&
nmapvals.conversion != CONVERT_DUDV_TO_NORMAL &&
nmapvals.conversion != CONVERT_HEIGHTMAP)
{
s = src;
for(y = 0; y < height; ++y)
{
for(x = 0; x < width; ++x)
{
if(!nmapvals.height_source)
{
switch(nmapvals.conversion)
{
case CONVERT_NONE:
val = (float)s[0] * 0.3f +
(float)s[1] * 0.59f +
(float)s[2] * 0.11f;
break;
case CONVERT_BIASED_RGB:
val = (((float)max(0, s[0] - rgb_bias[0])) * 0.3f ) +
(((float)max(0, s[1] - rgb_bias[1])) * 0.59f) +
(((float)max(0, s[2] - rgb_bias[2])) * 0.11f);
break;
case CONVERT_RED:
val = (float)s[0];
break;
case CONVERT_GREEN:
val = (float)s[1];
break;
case CONVERT_BLUE:
val = (float)s[2];
break;
case CONVERT_MAX_RGB:
val = (float)max(s[0], max(s[1], s[2]));
break;
case CONVERT_MIN_RGB:
val = (float)min(s[0], min(s[1], s[2]));
break;
case CONVERT_COLORSPACE:
val = (1.0f - ((1.0f - ((float)s[0] / 255.0f)) *
(1.0f - ((float)s[1] / 255.0f)) *
(1.0f - ((float)s[2] / 255.0f)))) * 255.0f;
break;
default:
val = 255.0f;
break;
}
}
else
val = (float)s[3];
heights[x + y * width] = val * oneover255;
s += bpp;
}
}
}
#define HEIGHT(x,y) \
(heights[(max(0, min(width - 1, (x)))) + (max(0, min(height - 1, (y)))) * width])
#define HEIGHT_WRAP(x,y) \
(heights[((x) < 0 ? (width + (x)) : ((x) >= width ? ((x) - width) : (x)))+ \
(((y) < 0 ? (height + (y)) : ((y) >= height ? ((y) - height) : (y))) * width)])
if(preview_mode)
{
cursor = gdk_cursor_new(GDK_WATCH);
gdk_window_set_cursor(GDK_WINDOW(dialog->window), cursor);
gdk_cursor_unref(cursor);
}
for(y = 0; y < height; ++y)
{
while(gtk_events_pending())
gtk_main_iteration();
for(x = 0; x < width; ++x)
{
d = dst + ((y * rowbytes) + (x * bpp));
s = src + ((y * rowbytes) + (x * bpp));
if(nmapvals.conversion == CONVERT_NORMALIZE_ONLY ||
nmapvals.conversion == CONVERT_HEIGHTMAP)
{
n[0] = (((float)s[0] * oneover255) - 0.5f) * 2.0f;
n[1] = (((float)s[1] * oneover255) - 0.5f) * 2.0f;
n[2] = (((float)s[2] * oneover255) - 0.5f) * 2.0f;
n[0] *= nmapvals.scale;
n[1] *= nmapvals.scale;