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* Factor most of the cacademo code.

tags/v0.99.beta14
Sam Hocevar sam 18 年之前
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共有 1 個文件被更改，包括 206 次插入 和 237 次删除
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  1. +206
    -237
      src/cacademo.c

+ 206
- 237
src/cacademo.c 查看文件

@@ -1,6 +1,7 @@
/*
* cacademo various demo effects for libcaca
* Copyright (c) 1998 Michele Bini <mibin@tin.it>
* 2003-2004 Jean-Yves Lamoureux <jylam@lnxscene.org>
* 2004 Sam Hocevar <sam@zoy.org>
* All Rights Reserved
*
@@ -17,6 +18,7 @@

#if !defined(__KERNEL__)
# include <stdio.h>
# include <stdlib.h>
# include <string.h>
# include <math.h>
# ifndef M_PI
@@ -27,105 +29,53 @@
#include "cucul.h"
#include "caca.h"

/* Virtual buffer size for dither-based demos */
#define XSIZ 256
#define YSIZ 256
static unsigned char screen[XSIZ * YSIZ];

/* The plasma effect */
#define TABLEX (XSIZ * 2)
#define TABLEY (YSIZ * 2)

static unsigned char table[TABLEX * TABLEY];

static int main_plasma(int, char **);
static void do_plasma(unsigned char *,
double, double, double, double, double, double);
enum action { INIT, UPDATE, DRAW, FREE };

/* The metaball effect */
#define METASIZE 128
#define METABALLS 12
#define CROPBALL 200 /* Colour index where to crop balls */

static int main_ball(int, char **);
static void create_ball(void);
static void draw_ball(unsigned int, unsigned int);
void plasma(enum action, cucul_canvas_t *);
void metaballs(enum action, cucul_canvas_t *);
void moire(enum action, cucul_canvas_t *);

static unsigned char metaball[METASIZE * METASIZE];

/* The moiré effect */
#define DISCSIZ 512
#define DISCTHICKNESS 96
void (*demo_list[])(enum action, cucul_canvas_t *) =
{
plasma,
metaballs,
moire,
};

static unsigned char disc[DISCSIZ * DISCSIZ];
/* Common macros for dither-based demos */
#define XSIZ 256
#define YSIZ 256

static int main_moir(int, char **);
static void put_disc(int, int);
static void draw_disc(int, char);
static void draw_line(int, int, char);
/* Global variables */
static int frame = 0;

int main(int argc, char **argv)
{
switch(cucul_rand(0, 3))
{
case 0:
return main_plasma(argc, argv);
case 1:
return main_ball(argc, argv);
case 2:
return main_moir(argc, argv);
}
static caca_display_t *dp;
static cucul_canvas_t *frontcv, *backcv, *mask;
int demo = 0, pause = 0;

return -1;
}
/* Set up two canvases, a mask, and attach a display to the front one */
frontcv = cucul_create_canvas(0, 0);
backcv = cucul_create_canvas(0, 0);
mask = cucul_create_canvas(0, 0);

static int main_plasma(int argc, char **argv)
{
cucul_canvas_t *cv, *c2, *mask; caca_display_t *dp;
unsigned int red[256], green[256], blue[256], alpha[256];
double r[3], R[6];
cucul_dither_t *dither;
int i, x, y, frame = 0, pause = 0;

cv = cucul_create_canvas(0, 0);
if(!cv)
return 1;
dp = caca_create_display(cv);
dp = caca_create_display(frontcv);
if(!dp)
return 1;

caca_set_display_time(dp, 20000);

c2 = cucul_create_canvas(cucul_get_canvas_width(cv),
cucul_get_canvas_height(cv));
mask = cucul_create_canvas(cucul_get_canvas_width(cv),
cucul_get_canvas_height(cv));

/* Fill various tables */
for(i = 0 ; i < 256; i++)
red[i] = green[i] = blue[i] = alpha[i] = 0;

for(i = 0; i < 3; i++)
r[i] = (double)(cucul_rand(1, 1000)) / 60000 * M_PI;
cucul_set_canvas_size(backcv, cucul_get_canvas_width(frontcv),
cucul_get_canvas_height(frontcv));
cucul_set_canvas_size(mask, cucul_get_canvas_width(frontcv),
cucul_get_canvas_height(frontcv));

for(i = 0; i < 6; i++)
R[i] = (double)(cucul_rand(1, 1000)) / 10000;

for(y = 0 ; y < TABLEY ; y++)
for(x = 0 ; x < TABLEX ; x++)
{
double tmp = (((double)((x - (TABLEX / 2)) * (x - (TABLEX / 2))
+ (y - (TABLEX / 2)) * (y - (TABLEX / 2))))
* (M_PI / (TABLEX * TABLEX + TABLEY * TABLEY)));
caca_set_display_time(dp, 20000);

table[x + y * TABLEX] = (1.0 + sin(12.0 * sqrt(tmp))) * 256 / 6;
}
demo = cucul_rand(0, 3);

/* Create a libcucul dither */
dither = cucul_create_dither(8, XSIZ, YSIZ, XSIZ, 0, 0, 0, 0);
demo_list[demo](INIT, NULL);

/* Main loop */
for(;;)
for(;;)
{
caca_event_t ev;
if(caca_get_event(dp, CACA_EVENT_KEY_PRESS, &ev, 0))
@@ -140,6 +90,74 @@ static int main_plasma(int argc, char **argv)
if(pause)
goto paused;

demo_list[demo](UPDATE, NULL);
frame++;
paused:
demo_list[demo](DRAW, frontcv);
cucul_set_color(frontcv, CUCUL_COLOR_WHITE, CUCUL_COLOR_BLUE);
cucul_putstr(frontcv, cucul_get_canvas_width(frontcv) - 30,
cucul_get_canvas_height(frontcv) - 2,
" -=[ Powered by libcaca ]=- ");
caca_refresh_display(dp);
}
end:
demo_list[demo](FREE, NULL);

caca_free_display(dp);
cucul_free_canvas(mask);
cucul_free_canvas(backcv);
cucul_free_canvas(frontcv);

return 0;
}

/* The plasma effect */
#define TABLEX (XSIZ * 2)
#define TABLEY (YSIZ * 2)
static uint8_t table[TABLEX * TABLEY];

static void do_plasma(uint8_t *,
double, double, double, double, double, double);

void plasma(enum action action, cucul_canvas_t *cv)
{
static cucul_dither_t *dither;
static uint8_t *screen;
static unsigned int red[256], green[256], blue[256], alpha[256];
static double r[3], R[6];

int i, x, y;

switch(action)
{
case INIT:
screen = malloc(XSIZ * YSIZ * sizeof(uint8_t));

/* Fill various tables */
for(i = 0 ; i < 256; i++)
red[i] = green[i] = blue[i] = alpha[i] = 0;

for(i = 0; i < 3; i++)
r[i] = (double)(cucul_rand(1, 1000)) / 60000 * M_PI;

for(i = 0; i < 6; i++)
R[i] = (double)(cucul_rand(1, 1000)) / 10000;

for(y = 0 ; y < TABLEY ; y++)
for(x = 0 ; x < TABLEX ; x++)
{
double tmp = (((double)((x - (TABLEX / 2)) * (x - (TABLEX / 2))
+ (y - (TABLEX / 2)) * (y - (TABLEX / 2))))
* (M_PI / (TABLEX * TABLEX + TABLEY * TABLEY)));

table[x + y * TABLEX] = (1.0 + sin(12.0 * sqrt(tmp))) * 256 / 6;
}

/* Create a libcucul dither */
dither = cucul_create_dither(8, XSIZ, YSIZ, XSIZ, 0, 0, 0, 0);
break;

case UPDATE:
for(i = 0 ; i < 256; i++)
{
double z = ((double)i) / 256 * 6 * M_PI;
@@ -159,36 +177,21 @@ static int main_plasma(int argc, char **argv)
(1.0 + sin(((double)frame) * R[3])) / 2,
(1.0 + sin(((double)frame) * R[4])) / 2,
(1.0 + sin(((double)frame) * R[5])) / 2);
frame++;

paused:
break;
case DRAW:
cucul_dither_bitmap(cv, 0, 0,
cucul_get_canvas_width(cv),
cucul_get_canvas_height(cv),
dither, screen);

cucul_blit(c2, 0, 0, cv, NULL);
cucul_invert(c2);


cucul_blit(cv, 0, 0, c2, mask);

cucul_set_color(cv, CUCUL_COLOR_WHITE, CUCUL_COLOR_BLUE);
cucul_putstr(cv, cucul_get_canvas_width(cv) - 30,
cucul_get_canvas_height(cv) - 2,
" -=[ Powered by libcaca ]=- ");
caca_refresh_display(dp);
break;
case FREE:
free(screen);
cucul_free_dither(dither);
break;
}

end:
cucul_free_dither(dither);
caca_free_display(dp);
cucul_free_canvas(cv);

return 0;
}

static void do_plasma(unsigned char *pixels, double x_1, double y_1,
static void do_plasma(uint8_t *pixels, double x_1, double y_1,
double x_2, double y_2, double x_3, double y_3)
{
unsigned int X1 = x_1 * (TABLEX / 2),
@@ -198,91 +201,80 @@ static void do_plasma(unsigned char *pixels, double x_1, double y_1,
X3 = x_3 * (TABLEX / 2),
Y3 = y_3 * (TABLEY / 2);
unsigned int y;
unsigned char * t1 = table + X1 + Y1 * TABLEX,
* t2 = table + X2 + Y2 * TABLEX,
* t3 = table + X3 + Y3 * TABLEX;
uint8_t * t1 = table + X1 + Y1 * TABLEX,
* t2 = table + X2 + Y2 * TABLEX,
* t3 = table + X3 + Y3 * TABLEX;

for(y = 0; y < YSIZ; y++)
{
unsigned int x;
unsigned char * tmp = pixels + y * YSIZ;
uint8_t * tmp = pixels + y * YSIZ;
unsigned int ty = y * TABLEX, tmax = ty + XSIZ;
for(x = 0; ty < tmax; ty++, tmp++)
tmp[0] = t1[ty] + t2[ty] + t3[ty];
}
}

static int main_ball(int argc, char **argv)
{
cucul_canvas_t *cv; caca_display_t *dp;
unsigned int r[256], g[256], b[256], a[256];
float dd[METABALLS], di[METABALLS], dj[METABALLS], dk[METABALLS];
unsigned int x[METABALLS], y[METABALLS];
cucul_dither_t *cucul_dither;
float i = 10.0, j = 17.0, k = 11.0;
int p, frame = 0, pause = 0;
double frameOffset[360 + 80];

cv = cucul_create_canvas(0, 0);
if(!cv)
return 1;
dp = caca_create_display(cv);
if(!dp)
return 1;

caca_set_display_time(dp, 20000);
/* The metaball effect */
#define METASIZE (XSIZ/2)
#define METABALLS 12
#define CROPBALL 200 /* Colour index where to crop balls */
static uint8_t metaball[METASIZE * METASIZE];

/* Make the palette eatable by libcaca */
for(p = 0; p < 256; p++)
r[p] = g[p] = b[p] = a[p] = 0x0;
r[255] = g[255] = b[255] = 0xfff;
static void create_ball(void);
static void draw_ball(uint8_t *, unsigned int, unsigned int);

/* Create a libcucul dither smaller than our pixel buffer, so that we
* display only the interesting part of it */
cucul_dither = cucul_create_dither(8, XSIZ - METASIZE, YSIZ - METASIZE,
XSIZ, 0, 0, 0, 0);
void metaballs(enum action action, cucul_canvas_t *cv)
{
static cucul_dither_t *cucul_dither;
static uint8_t *screen;
static unsigned int r[256], g[256], b[256], a[256];
static float dd[METABALLS], di[METABALLS], dj[METABALLS], dk[METABALLS];
static unsigned int x[METABALLS], y[METABALLS];
static float i = 10.0, j = 17.0, k = 11.0;
static double offset[360 + 80];

/* Generate ball sprite */
create_ball();
int p, angle;

for(p = 0; p < METABALLS; p++)
switch(action)
{
dd[p] = cucul_rand(0, 100);
di[p] = (float)cucul_rand(500, 4000) / 6000.0;
dj[p] = (float)cucul_rand(500, 4000) / 6000.0;
dk[p] = (float)cucul_rand(500, 4000) / 6000.0;
}
case INIT:
screen = malloc(XSIZ * YSIZ * sizeof(uint8_t));

for(frame = 0; frame < 360 + 80; frame++)
frameOffset[frame] = 1.0 + sin((double)(frame * M_PI / 60));
/* Make the palette eatable by libcaca */
for(p = 0; p < 256; p++)
r[p] = g[p] = b[p] = a[p] = 0x0;
r[255] = g[255] = b[255] = 0xfff;

/* Go ! */
for(;;)
{
caca_event_t ev;
if(caca_get_event(dp, CACA_EVENT_KEY_PRESS, &ev, 0))
/* Create a libcucul dither smaller than our pixel buffer, so that we
* display only the interesting part of it */
cucul_dither = cucul_create_dither(8, XSIZ - METASIZE, YSIZ - METASIZE,
XSIZ, 0, 0, 0, 0);
/* Generate ball sprite */
create_ball();

for(p = 0; p < METABALLS; p++)
{
switch(ev.data.key.ch)
{
case CACA_KEY_ESCAPE: goto end;
case ' ': pause = !pause;
}
dd[p] = cucul_rand(0, 100);
di[p] = (float)cucul_rand(500, 4000) / 6000.0;
dj[p] = (float)cucul_rand(500, 4000) / 6000.0;
dk[p] = (float)cucul_rand(500, 4000) / 6000.0;
}

if(pause)
goto paused;
for(p = 0; p < 360 + 80; p++)
offset[p] = 1.0 + sin((double)(p * M_PI / 60));
break;

frame++;
if(frame >= 360)
frame = 0;
case UPDATE:
angle = frame % 360;

/* Crop the palette */
for(p = CROPBALL; p < 255; p++)
{
int t1, t2, t3;
double c1 = frameOffset[frame];
double c2 = frameOffset[frame+40];
double c3 = frameOffset[frame+80];
double c1 = offset[angle];
double c2 = offset[angle + 40];
double c3 = offset[angle + 80];

t1 = p < 0x40 ? 0 : p < 0xc0 ? (p - 0x40) * 0x20 : 0xfff;
t2 = p < 0xe0 ? 0 : (p - 0xe0) * 0x80;
@@ -316,29 +308,21 @@ static int main_ball(int argc, char **argv)
/* Here is all the trick. Maybe if you're that
* clever you'll understand. */
for(p = 0; p < METABALLS; p++)
draw_ball(x[p], y[p]);
draw_ball(screen, x[p], y[p]);
break;

paused:
/* Draw our virtual buffer to screen, letting libcucul resize it */
case DRAW:
cucul_dither_bitmap(cv, 0, 0,
cucul_get_canvas_width(cv),
cucul_get_canvas_height(cv),
cucul_dither, screen + (METASIZE / 2) * (1 + XSIZ));
cucul_set_color(cv, CUCUL_COLOR_WHITE, CUCUL_COLOR_BLUE);
cucul_putstr(cv, cucul_get_canvas_width(cv) - 30,
cucul_get_canvas_height(cv) - 2,
" -=[ Powered by libcaca ]=- ");
break;

caca_refresh_display(dp);
case FREE:
free(screen);
cucul_free_dither(cucul_dither);
break;
}

/* End, bye folks */
end:
cucul_free_dither(cucul_dither);
caca_free_display(dp);
cucul_free_canvas(cv);

return 0;
}

/* Generate ball sprite
@@ -359,7 +343,7 @@ static void create_ball(void)
}

/* You missed the trick ? */
static void draw_ball(unsigned int bx, unsigned int by)
static void draw_ball(uint8_t *screen, unsigned int bx, unsigned int by)
{
unsigned int color;
unsigned int i, e = 0;
@@ -383,52 +367,44 @@ static void draw_ball(unsigned int bx, unsigned int by)
}
}

static int main_moir(int argc, char **argv)
{
cucul_canvas_t *cv; caca_display_t *dp;
unsigned int red[256], green[256], blue[256], alpha[256];
cucul_dither_t *dither;
int i, x, y, frame = 0, pause = 0;
/* The moiré effect */
#define DISCSIZ (XSIZ*2)
#define DISCTHICKNESS (XSIZ*15/40)
static uint8_t disc[DISCSIZ * DISCSIZ];

cv = cucul_create_canvas(0, 0);
if(!cv)
return 1;
dp = caca_create_display(cv);
if(!dp)
return 1;
static void put_disc(uint8_t *, int, int);
static void draw_disc(int, char);
static void draw_line(int, int, char);

caca_set_display_time(dp, 20000);
void moire(enum action action, cucul_canvas_t *cv)
{
static cucul_dither_t *dither;
static uint8_t *screen;
static unsigned int red[256], green[256], blue[256], alpha[256];

/* Fill various tables */
for(i = 0 ; i < 256; i++)
red[i] = green[i] = blue[i] = alpha[i] = 0;
int i, x, y;

red[0] = green[0] = blue[0] = 0x777;
red[1] = green[1] = blue[1] = 0xfff;
switch(action)
{
case INIT:
screen = malloc(XSIZ * YSIZ * sizeof(uint8_t));

/* Fill the circle */
for(i = DISCSIZ * 2; i > 0; i -= DISCTHICKNESS)
draw_disc(i, (i / DISCTHICKNESS) % 2);
/* Fill various tables */
for(i = 0 ; i < 256; i++)
red[i] = green[i] = blue[i] = alpha[i] = 0;

/* Create a libcucul dither */
dither = cucul_create_dither(8, XSIZ, YSIZ, XSIZ, 0, 0, 0, 0);
red[0] = green[0] = blue[0] = 0x777;
red[1] = green[1] = blue[1] = 0xfff;

/* Main loop */
for(;;)
{
caca_event_t ev;
if(caca_get_event(dp, CACA_EVENT_KEY_PRESS, &ev, 0))
{
switch(ev.data.key.ch)
{
case CACA_KEY_ESCAPE: goto end;
case ' ': pause = !pause;
}
}
/* Fill the circle */
for(i = DISCSIZ * 2; i > 0; i -= DISCTHICKNESS)
draw_disc(i, (i / DISCTHICKNESS) % 2);

if(pause)
goto paused;
/* Create a libcucul dither */
dither = cucul_create_dither(8, XSIZ, YSIZ, XSIZ, 0, 0, 0, 0);
break;

case UPDATE:
memset(screen, 0, XSIZ * YSIZ);

/* Set the palette */
@@ -445,35 +421,28 @@ static int main_moir(int argc, char **argv)
/* Draw circles */
x = cos(0.07 * frame + 5.0) * 128.0 + (XSIZ / 2);
y = sin(0.11 * frame) * 128.0 + (YSIZ / 2);
put_disc(x, y);
put_disc(screen, x, y);

x = cos(0.13 * frame + 2.0) * 64.0 + (XSIZ / 2);
y = sin(0.09 * frame + 1.0) * 64.0 + (YSIZ / 2);
put_disc(x, y);

frame++;
put_disc(screen, x, y);
break;

paused:
case DRAW:
cucul_dither_bitmap(cv, 0, 0,
cucul_get_canvas_width(cv),
cucul_get_canvas_height(cv),
dither, screen);
cucul_set_color(cv, CUCUL_COLOR_WHITE, CUCUL_COLOR_BLUE);
cucul_putstr(cv, cucul_get_canvas_width(cv) - 30,
cucul_get_canvas_height(cv) - 2,
" -=[ Powered by libcaca ]=- ");
caca_refresh_display(dp);
}

end:
cucul_free_dither(dither);
caca_free_display(dp);
cucul_free_canvas(cv);
break;

return 0;
case FREE:
free(screen);
cucul_free_dither(dither);
break;
}
}

static void put_disc(int x, int y)
static void put_disc(uint8_t *screen, int x, int y)
{
char *src = ((char*)disc) + (DISCSIZ / 2 - x) + (DISCSIZ / 2 - y) * DISCSIZ;
int i, j;


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