nodes from eechlo

* glare
* tonemap
* lense distort
* fast gauss blur

http://projects.blender.org/tracker/?func=detail&atid=127&aid=7505&group_id=9

made fast gauss blur an option for the blur node rather then a separate node.

1 files changed, 173 insertions, 0 deletions

diff --git a/source/blender/nodes/intern/CMP_nodes/CMP_tonemap.c b/source/blender/nodes/intern/CMP_nodes/CMP_tonemap.c
new file mode 100644
index 00000000000..b7c0475884b
--- /dev/null
+++ b/source/blender/nodes/intern/CMP_nodes/CMP_tonemap.c
@@ -0,0 +1,173 @@
+/**
+ *
+ * ***** 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): Alfredo de Greef  (eeshlo)
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#include "../CMP_util.h"
+
+static bNodeSocketType cmp_node_tonemap_in[]= {
+	{	SOCK_RGBA, 1, "Image",			0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f},
+	{	-1, 0, ""	}
+};
+static bNodeSocketType cmp_node_tonemap_out[]= {
+	{	SOCK_RGBA, 0, "Image",			0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f},
+	{	-1, 0, ""	}
+};
+
+
+static float avgLogLum(CompBuf *src, float* auto_key, float* Lav, float* Cav)
+{
+	float lsum = 0;
+	int p = src->x*src->y;
+	fRGB* bc = (fRGB*)src->rect;
+	float avl, maxl = -1e10f, minl = 1e10f;
+	const float sc = 1.f/(src->x*src->y);
+	*Lav = 0.f;
+	while (p--) {
+		float L = 0.212671f*bc[0][0] + 0.71516f*bc[0][1] + 0.072169f*bc[0][2];
+		*Lav += L;
+		fRGB_add(Cav, bc[0]);
+		lsum += logf(MAX2(L, 0.f) + 1e-5f);
+		maxl = (L > maxl) ? L : maxl;
+		minl = (L < minl) ? L : minl;
+		bc++;
+	}
+	*Lav *= sc;
+	fRGB_mult(Cav, sc);
+	maxl = logf(maxl + 1e-5f), minl = logf(minl + 1e-5f), avl = lsum*sc;
+	*auto_key = (maxl > minl) ? ((maxl - avl) / (maxl - minl)) : 1.f;
+	return expf(avl);
+}
+
+
+void static tonemap(NodeTonemap* ntm, CompBuf* dst, CompBuf* src)
+{
+	int x, y;
+	float dr, dg, db, al, igm = (ntm->gamma==0.f) ? 1 : (1.f / ntm->gamma);
+	float auto_key, Lav, Cav[3] = {0, 0, 0};
+
+	al = avgLogLum(src, &auto_key, &Lav, Cav);
+	al = (al == 0.f) ? 0.f : (ntm->key / al);
+
+	if (ntm->type == 1) {
+		// Reinhard/Devlin photoreceptor
+		const float f = expf(-ntm->f);
+		const float m = (ntm->m > 0.f) ? ntm->m : (0.3f + 0.7f*powf(auto_key, 1.4f));
+		const float ic = 1.f - ntm->c, ia = 1.f - ntm->a;
+		if (ntm->m == 0.f) printf("tonemap node, M: %g\n", m); 
+		for (y=0; y<src->y; ++y) {
+			fRGB* sp = (fRGB*)&src->rect[y*src->x*src->type];
+			fRGB* dp = (fRGB*)&dst->rect[y*src->x*src->type];
+			for (x=0; x<src->x; ++x) {
+				const float L = 0.212671f*sp[x][0] + 0.71516f*sp[x][1] + 0.072169f*sp[x][2];
+				float I_l = sp[x][0] + ic*(L - sp[x][0]);
+				float I_g = Cav[0] + ic*(Lav - Cav[0]);
+				float I_a = I_l + ia*(I_g - I_l);
+				dp[x][0] /= (dp[x][0] + powf(f*I_a, m));
+				I_l = sp[x][1] + ic*(L - sp[x][1]);
+				I_g = Cav[1] + ic*(Lav - Cav[1]);
+				I_a = I_l + ia*(I_g - I_l);
+				dp[x][1] /= (dp[x][1] + powf(f*I_a, m));
+				I_l = sp[x][2] + ic*(L - sp[x][2]);
+				I_g = Cav[2] + ic*(Lav - Cav[2]);
+				I_a = I_l + ia*(I_g - I_l);
+				dp[x][2] /= (dp[x][2] + powf(f*I_a, m));
+			}
+		}
+		return;
+	}
+
+	// Reinhard simple photographic tm (simplest, not using whitepoint var)
+	for (y=0; y<src->y; y++) {
+		fRGB* sp = (fRGB*)&src->rect[y*src->x*src->type];
+		fRGB* dp = (fRGB*)&dst->rect[y*src->x*src->type];
+		for (x=0; x<src->x; x++) {
+			fRGB_copy(dp[x], sp[x]);
+			fRGB_mult(dp[x], al);
+			dr = dp[x][0] + ntm->offset;
+			dg = dp[x][1] + ntm->offset;
+			db = dp[x][2] + ntm->offset;
+			dp[x][0] /= ((dr == 0.f) ? 1.f : dr);
+			dp[x][1] /= ((dg == 0.f) ? 1.f : dg);
+			dp[x][2] /= ((db == 0.f) ? 1.f : db);
+			if (igm != 0.f) {
+				dp[x][0] = powf(MAX2(dp[x][0], 0.f), igm);
+				dp[x][1] = powf(MAX2(dp[x][1], 0.f), igm);
+				dp[x][2] = powf(MAX2(dp[x][2], 0.f), igm);
+			}
+		}
+	}
+}
+
+
+static void node_composit_exec_tonemap(void *data, bNode *node, bNodeStack **in, bNodeStack **out)
+{
+	CompBuf *new, *img = in[0]->data;
+
+	if ((img==NULL) || (out[0]->hasoutput==0)) return;
+
+	if (img->type != CB_RGBA)
+		new = typecheck_compbuf(img, CB_RGBA);
+	else
+		new = dupalloc_compbuf(img);
+
+	tonemap(node->storage, new, img);
+
+	out[0]->data = new;
+}
+
+static void node_composit_init_tonemap(bNode* node)
+{
+	NodeTonemap *ntm = MEM_callocN(sizeof(NodeTonemap), "node tonemap data");
+	ntm->type = 1;
+	ntm->key = 0.18;
+	ntm->offset = 1;
+	ntm->gamma = 1;
+	ntm->f = 0;
+	ntm->m = 0;	// actual value is set according to input
+	// default a of 1 works well with natural HDR images, but not always so for cgi.
+	// Maybe should use 0 or at least lower initial value instead
+	ntm->a = 1;
+	ntm->c = 0;
+	node->storage = ntm;
+}
+
+bNodeType cmp_node_tonemap = {
+	/* *next,*prev */	NULL, NULL,
+	/* type code   */	CMP_NODE_TONEMAP,
+	/* name        */	"Tonemap",
+	/* width+range */	150, 120, 200,
+	/* class+opts  */	NODE_CLASS_OP_COLOR, NODE_OPTIONS,
+	/* input sock  */	cmp_node_tonemap_in,
+	/* output sock */	cmp_node_tonemap_out,
+	/* storage     */	"NodeTonemap",
+	/* execfunc    */	node_composit_exec_tonemap,
+	/* butfunc     */	NULL,
+	/* initfunc    */	node_composit_init_tonemap,
+	/* freestoragefunc    */	node_free_standard_storage,
+	/* copystoragefunc    */	node_copy_standard_storage,
+	/* id          */	NULL
+};