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tdeaddons/noatun-plugins/tyler/display.c

482 lines
11 KiB

/*
// Copyright (C) 2000 Julien Carme
// Copyright (C) 2001 Neil Stevens <neil@qualityassistant.com>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2, as
// published by the Free Software Foundation.
//
// 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
*/
#include "renderer.h"
#include "main.h"
#include "display.h"
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <SDL.h>
SDL_Color color_table[NB_PALETTES][256];
short current_colors[256];
byte* surface1;
byte* surface2;
void generate_colors(void)
{
int i,k;
float colors[NB_PALETTES][2][3]={{{1,1,1},{1,1,1}},
{{2,1.5,0},{0,0.5,2}},
{{0,1,2},{0,1,0}},
{{0,2,1},{0,0,1}},
{{2,0,0},{0,1,1}}};
for (k=0;k<NB_PALETTES;k++)
{
for ( i=0; i<128; i++ )
{
color_table[k][i].r = colors[k][0][0]*i;
color_table[k][i].g = colors[k][0][1]*i;
color_table[k][i].b = colors[k][0][2]*i;
}
for ( i=0; i<128; i++ )
{
color_table[k][i+128].r = colors[k][0][0]*127+colors[k][1][0]*i;
color_table[k][i+128].g = colors[k][0][1]*127+colors[k][1][1]*i;
color_table[k][i+128].b = colors[k][0][2]*127+colors[k][1][2]*i;
}
}
}
void change_color(int t2,int t1,int w)
{
unsigned int i;
for (i=0;i<255;i++)
{
int r,g,b;
r = (color_table[t1][i].r*w+color_table[t2][i].r*(256-w) )>>11;
g = (color_table[t1][i].g*w+color_table[t2][i].g*(256-w) )>>10;
b = (color_table[t1][i].b*w+color_table[t2][i].b*(256-w) )>>11;
current_colors[i]=(r<<11)+(g<<5)+b;
}
}
void compute_surface(t_interpol* vector_field)
{
int i,j;
int add_dest=0;
int add_src;
t_interpol *interpol;
register byte* ptr_pix;
int color;
byte* ptr_swap;
for (j=0;j<scr_par.height;j++)
{
for (i=0;i<scr_par.width;i++)
{
interpol=&vector_field[add_dest];
add_src=(interpol->coord & 0xFFFF)*scr_par.width+(interpol->coord>>16);
ptr_pix=&((byte*)surface1)[add_src];
color=(*(ptr_pix)*(interpol->weight>>24)
+*(ptr_pix+1)*((interpol->weight & 0xFFFFFF)>>16)
+*(ptr_pix+scr_par.width)*((interpol->weight & 0xFFFF)>>8)
+*(ptr_pix+scr_par.width+1)*(interpol->weight & 0xFF))>>8;
if (color>255)
surface2[add_dest]=255;
else
surface2[add_dest]=color;
add_dest++;
}
}
ptr_swap=surface1;
surface1=surface2;
surface2=ptr_swap;
}
void display_surface(void)
{
int i,j;
if (scr_par.scale>1)
{
for (i=0;i<scr_par.height;i++)
{
short* pdest=(short*)(screen->pixels+i*screen->pitch*scr_par.scale);
byte* psrc=surface1+i*scr_par.width;
if (scr_par.scale==2)
{
for (j=1; j<scr_par.width; j++)
{
*pdest = current_colors[*psrc++];
pdest++;
*pdest = *(pdest-1);
pdest++;
}
memcpy(screen->pixels+i*screen->pitch*2+screen->pitch,
screen->pixels+i*screen->pitch*2,screen->pitch);
}
/* else
{
for (j=1;j<scr_par.width;j++) {
*(pdest++)=current_colors[*psrc++];
*(pdest++)=*(pdest-1);
*(pdest++)=*(pdest-1);
}
memcpy(screen->pixels+i*screen->pitch*3+screen->pitch,
screen->pixels+i*screen->pitch*3,screen->pitch);
memcpy(screen->pixels+i*screen->pitch*3+screen->pitch*2,
screen->pixels+i*screen->pitch*3,screen->pitch);
}
*/
}
}
else
{
byte* psrc=surface1;
for (i=0;i<scr_par.height;i++)
{
short* pdest=(short*)(screen->pixels+i*screen->pitch);
for (j=0;j<scr_par.width;j++)
*pdest++=current_colors[*psrc++];
}
}
SDL_UpdateRect(screen, 0, 0, 0, 0);
}
void blur(t_interpol* vector_field)
{
compute_surface(vector_field);
display_surface();
}
void plot1(int x,int y,int c);
void plot1(int x,int y,int c)
{
if (x>0 && x<scr_par.width-3 && y>0 && y<scr_par.height-3)
assign_max(&(surface1)[x+y*scr_par.width],c);
}
void plot2(int x,int y,int c);
void plot2(int x,int y,int c)
{
int ty;
if (x>0 && x<scr_par.width-3 && y>0 && y<scr_par.height-3) {
ty = y*scr_par.width;
assign_max(&(surface1)[x+ty],c);
assign_max(&(surface1)[x+1+ty],c);
assign_max(&(surface1)[x+ty+scr_par.width],c);
assign_max(&(surface1)[x+1+ty+scr_par.width],c);
}
}
void plot3(int x,int y,int c);
void plot3(int x,int y,int c)
{
int ty;
if (x>0 && x<scr_par.width-3 && y>0 && y<scr_par.height-3) {
ty = y*scr_par.width;
assign_max(&(surface1)[x+ty],c/3);
assign_max(&(surface1)[x+1+ty],c>>1);
assign_max(&(surface1)[x+ty+scr_par.width],c>>1);
assign_max(&(surface1)[x+1+ty+scr_par.width],c);
assign_max(&(surface1)[x+ty+(scr_par.width<<1)],c/3);
assign_max(&(surface1)[x+2+ty+(scr_par.width<<1)],c/3);
assign_max(&(surface1)[x+1+ty+(scr_par.width<<1)],c>>1);
assign_max(&(surface1)[x+2+ty+scr_par.width],c>>1);
assign_max(&(surface1)[x+2+ty+scr_par.width],c/3);
}
}
#if 0
void line(int x1,int y1,int x2,int y2,int c)
{
int i,j;
float x,y,vx,vy,d;
const float step=1;
if (x1==x2 && y1==y2)
plot3(x1,y1,255);
else {
x=x1;
y=y1;
d=sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
vx=step*(x2-x1)/d;
vy=step*(y2-y1)/d;
for (i=0;i<(int)(d/step)+1;i++) {
plot1(x,y,c);
x+=vx;
y+=vy;
}
}
}
#endif
#define SWAP(x,y) \
x = x + y; \
y = x - y; \
x = x - y;
void line(int _x1, int _y1, int _x2, int _y2, int _c)
{
int dx, dy, cxy, dxy;
/* calculate the distances */
dx = abs(_x1 - _x2);
dy = abs(_y1 - _y2);
cxy = 0;
if (dy > dx)
{
/* Follow Y axis */
if (_y1 > _y2)
{
SWAP(_y1, _y2);
SWAP(_x1, _x2);
}
if (_x1 > _x2)
dxy = -1;
else
dxy = 1;
for (_y1=_y1; _y1<_y2; _y1++)
{
cxy += dx;
if (cxy >= dy)
{
_x1+= dxy;
cxy -= dy;
}
plot1(_x1, _y1, _c);
}
}
else
{
/* Follow X axis */
if (_x1 > _x2)
{
SWAP(_x1, _x2);
SWAP(_y1, _y2);
}
if (_y1 > _y2)
dxy = -1;
else
dxy = 1;
for (_x1=_x1; _x1<_x2; _x1++)
{
cxy += dy;
if (cxy >= dx)
{
_y1+=dxy;
cxy -= dx;
}
plot1(_x1, _y1, _c);
}
}
}
struct sincos
{
int i;
float *f;
};
/* Little optimization for cos/sin functions */
static struct sincos cosw = { 0, NULL };
static struct sincos sinw = { 0, NULL };
void spectral(t_effect* current_effect,short data[2][512])
{
int i, halfheight, halfwidth;
float old_y1,old_y2;
float _y1=(((data[0][0]+data[1][0])>>9)*current_effect->spectral_amplitude*scr_par.height)>>12;
float _y2=(((data[0][0]+data[1][0])>>9)*current_effect->spectral_amplitude*scr_par.height)>>12;
const int density_lines=5;
const int step=4;
const int shift=(current_effect->spectral_shift*scr_par.height)>>8;
if (cosw.i != scr_par.width || sinw.i != scr_par.width)
{
free(cosw.f);
free(sinw.f);
sinw.f = cosw.f = NULL;
sinw.i = cosw.i = 0;
}
if (cosw.i == 0 || cosw.f == NULL)
{
float halfPI = (float)PI/2;
cosw.i = scr_par.width;
cosw.f = malloc(sizeof(float)*scr_par.width);
for (i=0; i<scr_par.width;i+=step)
cosw.f[i] = cos((float)i/scr_par.width*PI+halfPI);
}
if (sinw.i == 0 || sinw.f == NULL)
{
float halfPI = (float)PI/2;
sinw.i = scr_par.width;
sinw.f = malloc(sizeof(float)*scr_par.width);
for (i=0; i<scr_par.width;i+=step)
sinw.f[i] = sin((float)i/scr_par.width*PI+halfPI);
}
if (current_effect->mode_spectre==3)
{
if (_y1<0)
_y1=0;
if (_y2<0)
_y2=0;
}
halfheight = scr_par.height >> 1;
halfwidth = scr_par.width >> 1;
for (i=step;i<scr_par.width;i+=step)
{
old_y1=_y1;
old_y2=_y2;
_y1=((data[1][(i<<9)/scr_par.width/density_lines]>>8)*
current_effect->spectral_amplitude*scr_par.height)>>12;
_y2=((data[0][(i<<9)/scr_par.width/density_lines]>>8)*
current_effect->spectral_amplitude*scr_par.height)>>12;
switch (current_effect->mode_spectre)
{
case 0:
line(i-step,halfheight+shift+old_y2,
i,halfheight+shift+_y2,
current_effect->spectral_color);
break;
case 1:
line(i-step,halfheight+shift+old_y1,
i,halfheight+shift+_y1,
current_effect->spectral_color);
line(i-step,halfheight-shift+old_y2,
i,halfheight-shift+_y2,
current_effect->spectral_color);
break;
case 2:
line(i-step,halfheight+shift+old_y1,
i,halfheight+shift+_y1,
current_effect->spectral_color);
line(i-step,halfheight-shift+old_y1,
i,halfheight-shift+_y1,
current_effect->spectral_color);
line(halfwidth+shift+old_y2,i-step,
halfwidth+shift+_y2,i,
current_effect->spectral_color);
line(halfwidth-shift+old_y2,i-step,
halfwidth-shift+_y2,i,
current_effect->spectral_color);
break;
case 3:
if (_y1<0)
_y1=0;
if (_y2<0)
_y2=0;
case 4:
line(halfwidth + cosw.f[i-step] * (shift+old_y1),
halfheight + sinw.f[i-step] * (shift+old_y1),
halfwidth + cosw.f[i] * (shift+_y1),
halfheight + sinw.f[i] * (shift+_y1),
current_effect->spectral_color);
line(halfwidth - cosw.f[i-step] * (shift+old_y2),
halfheight + sinw.f[i-step] * (shift+old_y2),
halfwidth - cosw.f[i] * (shift+_y2),
halfheight + sinw.f[i] * (shift+_y2),
current_effect->spectral_color);
break;
}
}
if (current_effect->mode_spectre==3 || current_effect->mode_spectre==4)
line(halfwidth + cosw.f[scr_par.width - step] * (shift+_y1),
halfheight + sinw.f[scr_par.width - step] * (shift+_y1),
halfwidth - cosw.f[scr_par.width - step] * (shift+_y2),
halfheight + sinw.f[scr_par.width - step] * (shift+_y2),
current_effect->spectral_color);
}
void curve(t_effect* current_effect)
{
int i,j,k;
float v,vr;
float x,y;
float amplitude=(float)current_effect->curve_amplitude/256;
for (j=0;j<2;j++)
{
v=80;
vr=0.001;
k=current_effect->x_curve;
for (i=0;i<64;i++)
{
x=cos((float)(k)/(v+v*j*1.34))*scr_par.height*amplitude;
y=sin((float)(k)/(1.756*(v+v*j*0.93)))*scr_par.height*amplitude;
plot2(x*cos((float)k*vr)+y*sin((float)k*vr)+scr_par.width/2,
x*sin((float)k*vr)-y*cos((float)k*vr)+scr_par.height/2,
current_effect->curve_color);
k++;
}
}
current_effect->x_curve=k;
}
void init_sdl(void)
{
surface1=(byte*)malloc(scr_par.width*scr_par.height);
surface2=(byte*)malloc(scr_par.width*scr_par.height);
if ( SDL_Init(SDL_INIT_VIDEO) < 0 )
{
fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
exit(1);
}
SDL_WM_SetCaption("Tyler", 0L);
screen = SDL_SetVideoMode(scr_par.width * scr_par.scale,
scr_par.height * scr_par.scale, 16, VIDEO_FLAGS);
if ( screen == NULL )
{
fprintf(stderr, "Couldn't init video mode: %s\n", SDL_GetError());
exit(1);
}
SDL_ShowCursor(0);
SDL_EnableKeyRepeat(0,0);
}
void toggle_fullscreen(void)
{
SDL_WM_ToggleFullScreen(screen);
}
void close_sdl(void)
{
SDL_Quit();
}