diff options
author | Robert Holcomb <bob_holcomb@hotmail.com> | 2007-03-24 09:57:29 +0300 |
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committer | Robert Holcomb <bob_holcomb@hotmail.com> | 2007-03-24 09:57:29 +0300 |
commit | 611d1c523c6872e048ba0f379d116d727a756e1e (patch) | |
tree | f6624b8fd1d4d9bb4cef9da2710dfc1ec6bce67a /source/blender/nodes/intern/CMP_nodes/CMP_displace.c | |
parent | f4c816869c8a9240eb6ed9abef194c4887256df2 (diff) |
Initial commit. Not in build system so shouldn't interfere with anything at this point. Will commit modified versions of existing files once build system is tested.
Diffstat (limited to 'source/blender/nodes/intern/CMP_nodes/CMP_displace.c')
-rw-r--r-- | source/blender/nodes/intern/CMP_nodes/CMP_displace.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/source/blender/nodes/intern/CMP_nodes/CMP_displace.c b/source/blender/nodes/intern/CMP_nodes/CMP_displace.c new file mode 100644 index 00000000000..371f978ef1a --- /dev/null +++ b/source/blender/nodes/intern/CMP_nodes/CMP_displace.c @@ -0,0 +1,158 @@ +/** + * $Id$ + * + * ***** 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * The Original Code is Copyright (C) 2006 Blender Foundation. + * All rights reserved. + * + * The Original Code is: all of this file. + * + * Contributor(s): none yet. + * + * ***** END GPL LICENSE BLOCK ***** + */ + +#include "../CMP_util.h" + + +/* **************** Displace ******************** */ + +static bNodeSocketType cmp_node_displace_in[]= { + { SOCK_RGBA, 1, "Image", 0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f}, + { SOCK_VECTOR, 1, "Vector", 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f}, + { SOCK_VALUE, 1, "X Scale", 0.0f, 0.0f, 0.0f, 0.0f, -1000.0f, 1000.0f}, + { SOCK_VALUE, 1, "Y Scale", 0.0f, 0.0f, 0.0f, 0.0f, -1000.0f, 1000.0f}, + { -1, 0, "" } +}; +static bNodeSocketType cmp_node_displace_out[]= { + { SOCK_RGBA, 0, "Image", 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f}, + { -1, 0, "" } +}; + +static void do_displace(CompBuf *stackbuf, CompBuf *cbuf, CompBuf *vecbuf, float *veccol, float *xscale, float *yscale) +{ + ImBuf *ibuf; + int x, y, sx, sy; + float dx=0.0, dy=0.0; + float dspx, dspy; + float uv[2]; + + float *out= stackbuf->rect, *vec=vecbuf->rect, *in= cbuf->rect; + float *vp, *vpnext, *vpprev; + + int row = 3*vecbuf->x; + + /* ibuf needed for sampling */ + ibuf= IMB_allocImBuf(cbuf->x, cbuf->y, 32, 0, 0); + ibuf->rect_float= cbuf->rect; + + vec = vecbuf->rect; + + sx= stackbuf->x; + sy= stackbuf->y; + + for(y=0; y<sy; y++) { + for(x= 0; x< sx; x++, out+=4, in+=4, vec+=3) { + + /* the x-xrad stuff is a bit weird, but i seem to need it otherwise + * my returned pixels are offset weirdly */ + vp = compbuf_get_pixel(vecbuf, veccol, x-vecbuf->xrad, y-vecbuf->yrad, vecbuf->xrad, vecbuf->yrad); + + /* find the new displaced co-ords, also correcting for translate offset */ + dspx = x - (*xscale * vp[0]); + dspy = y - (*yscale * vp[1]); + + /* convert image space to 0.0-1.0 UV space for sampling, correcting for translate offset */ + uv[0] = dspx / (float)sx; + uv[1] = dspy / (float)sy; + + if(x>0 && x< vecbuf->x-1 && y>0 && y< vecbuf->y-1) { + vpnext = vp+row; + vpprev = vp-row; + + /* adaptive sampling, X channel */ + dx= 0.5f*(fabs(vp[0]-vp[-3]) + fabs(vp[0]-vp[3])); + + dx+= 0.25f*(fabs(vp[0]-vpprev[-3]) + fabs(vp[0]-vpnext[-3])); + dx+= 0.25f*(fabs(vp[0]-vpprev[+3]) + fabs(vp[0]-vpnext[+3])); + + /* adaptive sampling, Y channel */ + dy= 0.5f*(fabs(vp[1]-vp[-row+1]) + fabs(vp[1]-vp[row+1])); + + dy+= 0.25f*(fabs(vp[1]-vpprev[+1-3]) + fabs(vp[1]-vpnext[+1-3])); + dy+= 0.25f*(fabs(vp[1]-vpprev[+1+3]) + fabs(vp[1]-vpnext[+1+3])); + + /* scaled down to prevent blurriness */ + /* 8: magic number, provides a good level of sharpness without getting too aliased */ + dx /= 8; + dy /= 8; + } + + /* should use mipmap */ + if(dx > 0.006f) dx= 0.006f; + if(dy > 0.006f) dy= 0.006f; + if ((vp[0]> 0.0) && (dx < 0.004)) dx = 0.004; + if ((vp[1]> 0.0) && (dy < 0.004)) dy = 0.004; + + + ibuf_sample(ibuf, uv[0], uv[1], dx, dy, out); + } + } + + IMB_freeImBuf(ibuf); +} + + +static void node_composit_exec_displace(void *data, bNode *node, bNodeStack **in, bNodeStack **out) +{ + if(out[0]->hasoutput==0) + return; + + if(in[0]->data && in[1]->data) { + CompBuf *cbuf= in[0]->data; + CompBuf *vecbuf= in[1]->data; + CompBuf *stackbuf; + + cbuf= typecheck_compbuf(cbuf, CB_RGBA); + vecbuf= typecheck_compbuf(vecbuf, CB_VEC3); + stackbuf= alloc_compbuf(cbuf->x, cbuf->y, CB_RGBA, 1); /* allocs */ + + do_displace(stackbuf, cbuf, vecbuf, in[1]->vec, in[2]->vec, in[3]->vec); + + out[0]->data= stackbuf; + + + if(cbuf!=in[0]->data) + free_compbuf(cbuf); + if(vecbuf!=in[1]->data) + free_compbuf(vecbuf); + } +} + +bNodeType cmp_node_displace= { + /* type code */ CMP_NODE_DISPLACE, + /* name */ "Displace", + /* width+range */ 140, 100, 320, + /* class+opts */ NODE_CLASS_DISTORT, NODE_OPTIONS, + /* input sock */ cmp_node_displace_in, + /* output sock */ cmp_node_displace_out, + /* storage */ "", + /* execfunc */ node_composit_exec_displace, + /* butfunc */ NULL +}; + |