1 files changed, 133 insertions, 0 deletions
diff --git a/release/plugins/sequence/gamma.c b/release/plugins/sequence/gamma.c
new file mode 100644
index 00000000000..828e2fd8841
--- /dev/null
+++ b/release/plugins/sequence/gamma.c
@@ -0,0 +1,133 @@
+/*
+ * Gamma Correction Plugin (RGB Version) 0.01
+ *
+ * Copyright (c) 2005 Peter Schlaile
+ *
+ * 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.
+ *
+ */
+
+#include "math.h"
+#include "plugin.h"
+#include <stdio.h>
+
+char name[]= "Gamma Correction";
+
+VarStruct varstr[]= {
+	{ NUMSLI|FLO, "St M:", 0.0,	-1.0,	1.0, "Setup Main"}, 
+	{ NUMSLI|FLO, "Gn M:",  1.0,	0.0,	10.0,"Gain Main"},
+	{ NUMSLI|FLO, "Ga M:", 1.0,	0.0,	10.0, "Gamma Main"},
+
+	{ NUMSLI|FLO, "St R:", 0.0,	-1.0,	1.0, "Setup Red"}, 
+	{ NUMSLI|FLO, "Gn R:",  1.0,	0.0,	10.0,"Gain Red"},
+	{ NUMSLI|FLO, "Ga R:", 1.0,	0.0,	10.0, "Gamma Red"},
+
+	{ NUMSLI|FLO, "St G:", 0.0,	-1.0,	1.0, "Setup Green"}, 
+	{ NUMSLI|FLO, "Gn G:",  1.0,	0.0,	10.0,"Gain Green"},
+	{ NUMSLI|FLO, "Ga G:", 1.0,	0.0,	10.0, "Gamma Green"},
+
+	{ NUMSLI|FLO, "St B:", 0.0,	-1.0,	1.0, "Setup Blue"}, 
+	{ NUMSLI|FLO, "Gn B:",  1.0,	0.0,	10.0,"Gain Blue"},
+	{ NUMSLI|FLO, "Ga B:", 1.0,	0.0,	10.0, "Gamma Blue"},
+};
+
+typedef struct Cast {
+	float setup_m;
+	float gain_m;
+	float gamma_m;
+
+	float setup_r;
+	float gain_r;
+	float gamma_r;
+
+	float setup_g;
+	float gain_g;
+	float gamma_g;
+
+	float setup_b;
+	float gain_b;
+	float gamma_b;
+} Cast;
+
+float cfra;
+
+void plugin_seq_doit(Cast *, float, float, int, int, ImBuf *, ImBuf *, ImBuf *, ImBuf *);
+
+int plugin_seq_getversion(void) { return B_PLUGIN_VERSION;}
+void plugin_but_changed(int but) {}
+void plugin_init() {}
+
+void plugin_getinfo(PluginInfo *info) {
+	info->name= name;
+	info->nvars= sizeof(varstr)/sizeof(VarStruct);
+	info->cfra= &cfra;
+
+	info->varstr= varstr;
+
+	info->init= plugin_init;
+	info->seq_doit= (SeqDoit) plugin_seq_doit;
+	info->callback= plugin_but_changed;
+}
+
+static void make_gamma_table(float setup, float gain, float gamma,
+			     unsigned char * table)
+{
+	int y;
+
+	for (y = 0; y < 256; y++) {
+	        float v = 1.0 * y / 255;
+		v += setup;
+		v *= gain;
+		v = pow(v, gamma);
+		if ( v > 1.0) {
+			v = 1.0;
+		} else if (v < 0.0) {
+			v = 0.0;
+		}
+		table[y] = v * 255;
+	}
+
+}
+
+void plugin_seq_doit(Cast *cast, float facf0, float facf1, int width, 
+	int height, ImBuf *ibuf1, ImBuf *ibuf2, ImBuf *out, ImBuf *use) {
+	char *dest, *src1, *src2;
+	int x, y, c;
+	float rgb[3];
+	float yuv[3];
+	unsigned char gamma_table_m[256];
+	unsigned char gamma_table_r[256];
+	unsigned char gamma_table_g[256];
+	unsigned char gamma_table_b[256];
+	
+	if (!ibuf1) return;
+
+	dest= (char *) out->rect;
+	src1= (char *) ibuf1->rect;
+
+	make_gamma_table(cast->setup_m, cast->gain_m, cast->gamma_m,
+			 gamma_table_m);
+	make_gamma_table(cast->setup_r, cast->gain_r, cast->gamma_r,
+			 gamma_table_r);
+	make_gamma_table(cast->setup_g, cast->gain_g, cast->gamma_g,
+			 gamma_table_g);
+	make_gamma_table(cast->setup_b, cast->gain_b, cast->gamma_b,
+			 gamma_table_b);
+
+	for (y = 0; y < height; y++) {
+		for (x = 0; x < width; x++) {
+			*dest++ = gamma_table_r[gamma_table_m[*src1++]];
+			*dest++ = gamma_table_g[gamma_table_m[*src1++]];
+			*dest++ = gamma_table_b[gamma_table_m[*src1++]];
+			dest++; src1++;
+		}
+	}
+}