gstreamer/subprojects/gst-plugins-good/gst/goom/lines.c

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/* Goom Project
* Copyright (C) <2003> iOS-Software
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "lines.h"
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include "goom_tools.h"
#include "drawmethods.h"
#include "goom_plugin_info.h"
static inline unsigned char
lighten (unsigned char value, float power)
{
int val = value;
float t = (float) val * log10 (power) / 2.0;
if (t > 0) {
val = (int) t; /* (32.0f * log (t)); */
if (val > 255)
val = 255;
if (val < 0)
val = 0;
return val;
} else {
return 0;
}
}
static void
lightencolor (guint32 * col, float power)
{
unsigned char *color;
color = (unsigned char *) col;
*color = lighten (*color, power);
color++;
*color = lighten (*color, power);
color++;
*color = lighten (*color, power);
color++;
*color = lighten (*color, power);
}
static void
genline (int id, float param, GMUnitPointer * l, int rx, int ry)
{
int i;
switch (id) {
case GML_HLINE:
for (i = 0; i < 512; i++) {
l[i].x = ((float) i * rx) / 512.0f;
l[i].y = param;
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l[i].angle = G_PI / 2.0f;
}
return;
case GML_VLINE:
for (i = 0; i < 512; i++) {
l[i].y = ((float) i * ry) / 512.0f;
l[i].x = param;
l[i].angle = 0.0f;
}
return;
case GML_CIRCLE:
for (i = 0; i < 512; i++) {
float cosa, sina;
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l[i].angle = 2.0f * G_PI * (float) i / 512.0f;
cosa = param * cos (l[i].angle);
sina = param * sin (l[i].angle);
l[i].x = ((float) rx / 2.0f) + cosa;
l[i].y = (float) ry / 2.0f + sina;
}
return;
}
}
static guint32
getcouleur (int mode)
{
switch (mode) {
case GML_RED:
return (230 << (ROUGE * 8)) | (120 << (VERT * 8)) | (18 << (BLEU * 8));
case GML_ORANGE_J:
return (120 << (VERT * 8)) | (252 << (ROUGE * 8)) | (18 << (BLEU * 8));
case GML_ORANGE_V:
return (160 << (VERT * 8)) | (236 << (ROUGE * 8)) | (40 << (BLEU * 8));
case GML_BLEUBLANC:
return (40 << (BLEU * 8)) | (220 << (ROUGE * 8)) | (140 << (VERT * 8));
case GML_VERT:
return (200 << (VERT * 8)) | (80 << (ROUGE * 8)) | (18 << (BLEU * 8));
case GML_BLEU:
return (250 << (BLEU * 8)) | (30 << (VERT * 8)) | (80 << (ROUGE * 8));
case GML_BLACK:
return (16 << (BLEU * 8)) | (16 << (VERT * 8)) | (16 << (ROUGE * 8));
}
return 0;
}
void
goom_lines_set_res (GMLine * gml, int rx, int ry)
{
if (gml != NULL) {
gml->screenX = rx;
gml->screenY = ry;
genline (gml->IDdest, gml->param, gml->points2, rx, ry);
}
}
static void
goom_lines_move (GMLine * l)
{
int i;
unsigned char *c1, *c2;
for (i = 0; i < 512; i++) {
l->points[i].x = (l->points2[i].x + 39.0f * l->points[i].x) / 40.0f;
l->points[i].y = (l->points2[i].y + 39.0f * l->points[i].y) / 40.0f;
l->points[i].angle =
(l->points2[i].angle + 39.0f * l->points[i].angle) / 40.0f;
}
c1 = (unsigned char *) &l->color;
c2 = (unsigned char *) &l->color2;
for (i = 0; i < 4; i++) {
int cc1, cc2;
cc1 = *c1;
cc2 = *c2;
*c1 = (unsigned char) ((cc1 * 63 + cc2) >> 6);
++c1;
++c2;
}
l->power += l->powinc;
if (l->power < 1.1f) {
l->power = 1.1f;
l->powinc = (float) (goom_irand (l->goomInfo->gRandom, 20) + 10) / 300.0f;
}
if (l->power > 17.5f) {
l->power = 17.5f;
l->powinc = -(float) (goom_irand (l->goomInfo->gRandom, 20) + 10) / 300.0f;
}
l->amplitude = (99.0f * l->amplitude + l->amplitudeF) / 100.0f;
}
void
goom_lines_switch_to (GMLine * gml, int IDdest,
float param, float amplitude, int col)
{
genline (IDdest, param, gml->points2, gml->screenX, gml->screenY);
gml->IDdest = IDdest;
gml->param = param;
gml->amplitudeF = amplitude;
gml->color2 = getcouleur (col);
}
GMLine *
goom_lines_init (PluginInfo * goomInfo, int rx, int ry,
int IDsrc, float paramS, int coulS, int IDdest, float paramD, int coulD)
{
GMLine *l = (GMLine *) malloc (sizeof (GMLine));
l->goomInfo = goomInfo;
l->points = (GMUnitPointer *) malloc (512 * sizeof (GMUnitPointer));
l->points2 = (GMUnitPointer *) malloc (512 * sizeof (GMUnitPointer));
l->nbPoints = 512;
l->IDdest = IDdest;
l->param = paramD;
l->amplitude = l->amplitudeF = 1.0f;
genline (IDsrc, paramS, l->points, rx, ry);
genline (IDdest, paramD, l->points2, rx, ry);
l->color = getcouleur (coulS);
l->color2 = getcouleur (coulD);
l->screenX = rx;
l->screenY = ry;
l->power = 0.0f;
l->powinc = 0.01f;
goom_lines_switch_to (l, IDdest, paramD, 1.0f, coulD);
return l;
}
void
goom_lines_free (GMLine ** l)
{
free ((*l)->points2);
free ((*l)->points);
free (*l);
l = NULL;
}
void
goom_lines_draw (PluginInfo * plug, GMLine * line, gint16 data[512], Pixel * p)
{
if (line != NULL) {
int i, x1, y1;
guint32 color = line->color;
GMUnitPointer *pt = &(line->points[0]);
float cosa = cos (pt->angle) / 1000.0f;
float sina = sin (pt->angle) / 1000.0f;
lightencolor (&color, line->power);
x1 = (int) (pt->x + cosa * line->amplitude * data[0]);
y1 = (int) (pt->y + sina * line->amplitude * data[0]);
for (i = 1; i < 512; i++) {
int x2, y2;
GMUnitPointer *pt = &(line->points[i]);
float cosa = cos (pt->angle) / 1000.0f;
float sina = sin (pt->angle) / 1000.0f;
x2 = (int) (pt->x + cosa * line->amplitude * data[i]);
y2 = (int) (pt->y + sina * line->amplitude * data[i]);
plug->methods.draw_line (p, x1, y1, x2, y2, color, line->screenX,
line->screenY);
x1 = x2;
y1 = y2;
}
goom_lines_move (line);
}
}