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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* 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; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2006 Blender Foundation.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): Alfredo de Greef (eeshlo)
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/nodes/composite/nodes/node_composite_lensdist.c
* \ingroup cmpnodes
*/
#include "node_composite_util.h"
static bNodeSocketTemplate cmp_node_lensdist_in[]= {
{ SOCK_RGBA, 1, N_("Image"), 1.0f, 1.0f, 1.0f, 1.0f},
{ SOCK_FLOAT, 1, N_("Distort"), 0.f, 0.f, 0.f, 0.f, -0.999f, 1.f, PROP_NONE},
{ SOCK_FLOAT, 1, N_("Dispersion"), 0.f, 0.f, 0.f, 0.f, 0.f, 1.f, PROP_NONE},
{ -1, 0, "" }
};
static bNodeSocketTemplate cmp_node_lensdist_out[]= {
{ SOCK_RGBA, 0, N_("Image")},
{ -1, 0, "" }
};
#ifdef WITH_COMPOSITOR_LEGACY
/* assumes *dst is type RGBA */
static void lensDistort(CompBuf *dst, CompBuf *src, float kr, float kg, float kb, int jit, int proj, int fit)
{
int x, y, z;
const float cx = 0.5f*(float)dst->x, cy = 0.5f*(float)dst->y;
if (proj) {
// shift
CompBuf *tsrc = dupalloc_compbuf(src);
for (z=0; z<tsrc->type; ++z)
IIR_gauss(tsrc, (kr+0.5f)*(kr+0.5f), z, 1);
kr *= 20.f;
for (y=0; y<dst->y; y++) {
fRGB *colp = (fRGB*)&dst->rect[y*dst->x*dst->type];
const float v = (y + 0.5f)/(float)dst->y;
for (x=0; x<dst->x; x++) {
const float u = (x + 0.5f)/(float)dst->x;
qd_getPixelLerpChan(tsrc, (u*dst->x + kr) - 0.5f, v*dst->y - 0.5f, 0, colp[x]);
if (tsrc->type == CB_VAL)
colp[x][1] = tsrc->rect[x + y*tsrc->x];
else
colp[x][1] = tsrc->rect[(x + y*tsrc->x)*tsrc->type + 1];
qd_getPixelLerpChan(tsrc, (u*dst->x - kr) - 0.5f, v*dst->y - 0.5f, 2, colp[x]+2);
/* set alpha */
colp[x][3]= 1.0f;
}
}
free_compbuf(tsrc);
}
else {
// Spherical
// Scale factor to make bottom/top & right/left sides fit in window after deform
// so in the case of pincushion (kn < 0), corners will be outside window.
// Now also optionally scales image such that black areas are not visible when distort factor is positive
// (makes distorted corners match window corners, but really only valid if mk<=0.5)
const float mk = MAX3(kr, kg, kb);
const float sc = (fit && (mk > 0.f)) ? (1.f/(1.f + 2.f*mk)) : (1.f/(1.f + mk));
const float drg = 4.f*(kg - kr), dgb = 4.f*(kb - kg);
kr *= 4.f, kg *= 4.f, kb *= 4.f;
for (y=0; y<dst->y; y++) {
fRGB *colp = (fRGB*)&dst->rect[y*dst->x*dst->type];
const float v = sc*((y + 0.5f) - cy)/cy;
for (x=0; x<dst->x; x++) {
int dr = 0, dg = 0, db = 0;
float d, t, ln[6] = {0, 0, 0, 0, 0, 0};
fRGB c1, tc = {0, 0, 0, 0};
const float u = sc*((x + 0.5f) - cx)/cx;
const float uv_dot = u * u + v * v;
int sta = 0, mid = 0, end = 0;
if ((t = 1.f - kr*uv_dot) >= 0.f) {
d = 1.f/(1.f + sqrtf(t));
ln[0] = (u*d + 0.5f)*dst->x - 0.5f, ln[1] = (v*d + 0.5f)*dst->y - 0.5f;
sta = 1;
}
if ((t = 1.f - kg*uv_dot) >= 0.f) {
d = 1.f/(1.f + sqrtf(t));
ln[2] = (u*d + 0.5f)*dst->x - 0.5f, ln[3] = (v*d + 0.5f)*dst->y - 0.5f;
mid = 1;
}
if ((t = 1.f - kb*uv_dot) >= 0.f) {
d = 1.f/(1.f + sqrtf(t));
ln[4] = (u*d + 0.5f)*dst->x - 0.5f, ln[5] = (v*d + 0.5f)*dst->y - 0.5f;
end = 1;
}
if (sta && mid && end) {
// RG
const int dx = ln[2] - ln[0], dy = ln[3] - ln[1];
const float dsf = sqrtf(dx*dx + dy*dy) + 1.f;
const int ds = (int)(jit ? ((dsf < 4.f) ? 2.f : sqrtf(dsf)) : dsf);
const float sd = 1.f/(float)ds;
for (z=0; z<ds; ++z) {
const float tz = ((float)z + (jit ? BLI_frand() : 0.5f))*sd;
t = 1.f - (kr + tz*drg)*uv_dot;
d = 1.f / (1.f + sqrtf(t));
qd_getPixelLerp(src, (u*d + 0.5f)*dst->x - 0.5f, (v*d + 0.5f)*dst->y - 0.5f, c1);
if (src->type == CB_VAL) c1[1] = c1[2] = c1[0];
tc[0] += (1.f-tz)*c1[0], tc[1] += tz*c1[1];
dr++, dg++;
}
// GB
{
const int dx = ln[4] - ln[2], dy = ln[5] - ln[3];
const float dsf = sqrtf(dx*dx + dy*dy) + 1.f;
const int ds = (int)(jit ? ((dsf < 4.f) ? 2.f : sqrtf(dsf)) : dsf);
const float sd = 1.f/(float)ds;
for (z=0; z<ds; ++z) {
const float tz = ((float)z + (jit ? BLI_frand() : 0.5f))*sd;
t = 1.f - (kg + tz*dgb)*uv_dot;
d = 1.f / (1.f + sqrtf(t));
qd_getPixelLerp(src, (u*d + 0.5f)*dst->x - 0.5f, (v*d + 0.5f)*dst->y - 0.5f, c1);
if (src->type == CB_VAL) c1[1] = c1[2] = c1[0];
tc[1] += (1.f-tz)*c1[1], tc[2] += tz*c1[2];
dg++, db++;
}
}
}
if (dr) colp[x][0] = 2.f*tc[0] / (float)dr;
if (dg) colp[x][1] = 2.f*tc[1] / (float)dg;
if (db) colp[x][2] = 2.f*tc[2] / (float)db;
/* set alpha */
colp[x][3]= 1.0f;
}
}
}
}
static void node_composit_exec_lensdist(void *UNUSED(data), bNode *node, bNodeStack **in, bNodeStack **out)
{
CompBuf *new, *img = in[0]->data;
NodeLensDist *nld = node->storage;
const float k = MAX2(MIN2(in[1]->vec[0], 1.f), -0.999f);
// smaller dispersion range for somewhat more control
const float d = 0.25f*MAX2(MIN2(in[2]->vec[0], 1.f), 0.f);
const float kr = MAX2(MIN2((k+d), 1.f), -0.999f), kb = MAX2(MIN2((k-d), 1.f), -0.999f);
if ((img==NULL) || (out[0]->hasoutput==0)) return;
new = alloc_compbuf(img->x, img->y, CB_RGBA, 1);
lensDistort(new, img, (nld->proj ? d : kr), k, kb, nld->jit, nld->proj, nld->fit);
out[0]->data = new;
}
#endif /* WITH_COMPOSITOR_LEGACY */
static void node_composit_init_lensdist(bNodeTree *UNUSED(ntree), bNode *node, bNodeTemplate *UNUSED(ntemp))
{
NodeLensDist *nld = MEM_callocN(sizeof(NodeLensDist), "node lensdist data");
nld->jit = nld->proj = nld->fit = 0;
node->storage = nld;
}
void register_node_type_cmp_lensdist(bNodeTreeType *ttype)
{
static bNodeType ntype;
node_type_base(ttype, &ntype, CMP_NODE_LENSDIST, "Lens Distortion", NODE_CLASS_DISTORT, NODE_OPTIONS);
node_type_socket_templates(&ntype, cmp_node_lensdist_in, cmp_node_lensdist_out);
node_type_size(&ntype, 150, 120, 200);
node_type_init(&ntype, node_composit_init_lensdist);
node_type_storage(&ntype, "NodeLensDist", node_free_standard_storage, node_copy_standard_storage);
#ifdef WITH_COMPOSITOR_LEGACY
node_type_exec(&ntype, node_composit_exec_lensdist);
#endif
nodeRegisterType(ttype, &ntype);
}
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