cacalabs
/
libcaca
mirror of https://github.com/cacalabs/libcaca.git
1
0
Fork 0
Code Issues 0 Releases 7 Wiki Activity
Browse Source

* Smooth transitions between effects in cacademo. Press 'n' to switch 

immediately to the next transition.
tags/v0.99.beta14
Sam Hocevar sam 18 years ago
parent
4ed8de10ac
commit
baff99daed
1 changed files with 117 additions and 38 deletions
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. +117
    -38
      src/cacademo.c

+ 117
- 38
src/cacademo.c View File

@@ -1,8 +1,8 @@
/*
* 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>
* 2003-2006 Jean-Yves Lamoureux <jylam@lnxscene.org>
* 2004-2006 Sam Hocevar <sam@zoy.org>
* All Rights Reserved
*
* $Id$
@@ -29,7 +29,7 @@
#include "cucul.h"
#include "caca.h"

enum action { INIT, UPDATE, DRAW, FREE };
enum action { PREPARE, INIT, UPDATE, RENDER, FREE };

void plasma(enum action, cucul_canvas_t *);
void metaballs(enum action, cucul_canvas_t *);
@@ -37,7 +37,7 @@ void moire(enum action, cucul_canvas_t *);
void langton(enum action, cucul_canvas_t *);
void matrix(enum action, cucul_canvas_t *);

void (*demo_list[])(enum action, cucul_canvas_t *) =
void (*fn[])(enum action, cucul_canvas_t *) =
{
plasma,
metaballs,
@@ -45,7 +45,10 @@ void (*demo_list[])(enum action, cucul_canvas_t *) =
//langton,
matrix,
};
#define DEMOS (sizeof(demo_list)/sizeof(*demo_list))
#define DEMOS (sizeof(fn)/sizeof(*fn))

#define DEMO_FRAMES 1000
#define TRANSITION_FRAMES 40

/* Common macros for dither-based demos */
#define XSIZ 256
@@ -58,7 +61,9 @@ int main(int argc, char **argv)
{
static caca_display_t *dp;
static cucul_canvas_t *frontcv, *backcv, *mask;
int demo = 0, pause = 0;

int demo, next = -1, pause = 0, next_transition = DEMO_FRAMES;
unsigned int i;

/* Set up two canvases, a mask, and attach a display to the front one */
frontcv = cucul_create_canvas(0, 0);
@@ -76,29 +81,92 @@ int main(int argc, char **argv)

caca_set_display_time(dp, 20000);

demo = cucul_rand(0, DEMOS);
/* Initialise all demos' lookup tables */
for(i = 0; i < DEMOS; i++)
fn[i](PREPARE, frontcv);

demo_list[demo](INIT, frontcv);
/* Choose a demo at random */
demo = cucul_rand(0, DEMOS);
fn[demo](INIT, frontcv);

for(;;)
{
/* Handle events */
caca_event_t ev;
if(caca_get_event(dp, CACA_EVENT_KEY_PRESS, &ev, 0))
while(caca_get_event(dp, CACA_EVENT_KEY_PRESS
| CACA_EVENT_QUIT, &ev, 0))
{
if(ev.type == CACA_EVENT_QUIT)
goto end;

switch(ev.data.key.ch)
{
case CACA_KEY_ESCAPE: goto end;
case ' ': pause = !pause;
case CACA_KEY_ESCAPE:
goto end;
case ' ':
pause = !pause;
break;
case 'n':
if(next == -1)
next_transition = frame;
break;
}
}

/* Resize the spare canvas, just in case the main one changed */
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));

if(pause)
goto paused;

demo_list[demo](UPDATE, frontcv);
/* Update demo's data */
fn[demo](UPDATE, frontcv);

/* Handle transitions */
if(frame == next_transition)
{
next = cucul_rand(0, DEMOS);
if(next == demo)
next = (next + 1) % DEMOS;
fn[next](INIT, backcv);
}
else if(frame == next_transition + TRANSITION_FRAMES)
{
fn[demo](FREE, frontcv);
demo = next;
next = -1;
next_transition = frame + DEMO_FRAMES;
}

if(next != -1)
fn[next](UPDATE, backcv);

frame++;
paused:
demo_list[demo](DRAW, frontcv);
/* Render main demo's canvas */
fn[demo](RENDER, frontcv);

/* If a transition is on its way, render it */
if(next != -1)
{
fn[next](RENDER, backcv);
cucul_set_color(mask, CUCUL_COLOR_LIGHTGRAY, CUCUL_COLOR_BLACK);
cucul_clear_canvas(mask);
cucul_set_color(mask, CUCUL_COLOR_WHITE, CUCUL_COLOR_WHITE);
cucul_fill_ellipse(mask,
cucul_get_canvas_width(mask) / 2,
cucul_get_canvas_height(mask) / 2,
cucul_get_canvas_width(mask) *
(frame - next_transition) / TRANSITION_FRAMES * 3 / 4,
cucul_get_canvas_height(mask) *
(frame - next_transition) / TRANSITION_FRAMES * 3 / 4,
"#");
cucul_blit(frontcv, 0, 0, backcv, mask);
}

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,
@@ -106,7 +174,9 @@ paused:
caca_refresh_display(dp);
}
end:
demo_list[demo](FREE, frontcv);
if(next != -1)
fn[next](FREE, frontcv);
fn[demo](FREE, frontcv);

caca_free_display(dp);
cucul_free_canvas(mask);
@@ -135,9 +205,7 @@ void plasma(enum action action, cucul_canvas_t *cv)

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

case PREPARE:
/* Fill various tables */
for(i = 0 ; i < 256; i++)
red[i] = green[i] = blue[i] = alpha[i] = 0;
@@ -157,8 +225,10 @@ void plasma(enum action action, cucul_canvas_t *cv)

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

/* Create a libcucul dither */
case INIT:
screen = malloc(XSIZ * YSIZ * sizeof(uint8_t));
dither = cucul_create_dither(8, XSIZ, YSIZ, XSIZ, 0, 0, 0, 0);
break;

@@ -184,7 +254,7 @@ void plasma(enum action action, cucul_canvas_t *cv)
(1.0 + sin(((double)frame) * R[5])) / 2);
break;

case DRAW:
case RENDER:
cucul_dither_bitmap(cv, 0, 0,
cucul_get_canvas_width(cv),
cucul_get_canvas_height(cv),
@@ -245,18 +315,12 @@ void metaballs(enum action action, cucul_canvas_t *cv)

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

case PREPARE:
/* 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;

/* 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();

@@ -272,6 +336,14 @@ void metaballs(enum action action, cucul_canvas_t *cv)
offset[p] = 1.0 + sin((double)(p * M_PI / 60));
break;

case INIT:
screen = malloc(XSIZ * YSIZ * sizeof(uint8_t));
/* 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);
break;

case UPDATE:
angle = frame % 360;

@@ -318,7 +390,7 @@ void metaballs(enum action action, cucul_canvas_t *cv)
draw_ball(screen, x[p], y[p]);
break;

case DRAW:
case RENDER:
cucul_dither_bitmap(cv, 0, 0,
cucul_get_canvas_width(cv),
cucul_get_canvas_height(cv),
@@ -393,9 +465,7 @@ void moire(enum action action, cucul_canvas_t *cv)

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

case PREPARE:
/* Fill various tables */
for(i = 0 ; i < 256; i++)
red[i] = green[i] = blue[i] = alpha[i] = 0;
@@ -407,7 +477,10 @@ void moire(enum action action, cucul_canvas_t *cv)
for(i = DISCSIZ * 2; i > 0; i -= DISCTHICKNESS)
draw_disc(i, (i / DISCTHICKNESS) % 2);

/* Create a libcucul dither */
break;

case INIT:
screen = malloc(XSIZ * YSIZ * sizeof(uint8_t));
dither = cucul_create_dither(8, XSIZ, YSIZ, XSIZ, 0, 0, 0, 0);
break;

@@ -435,7 +508,7 @@ void moire(enum action action, cucul_canvas_t *cv)
put_disc(screen, x, y);
break;

case DRAW:
case RENDER:
cucul_dither_bitmap(cv, 0, 0,
cucul_get_canvas_width(cv),
cucul_get_canvas_height(cv),
@@ -508,11 +581,9 @@ void langton(enum action action, cucul_canvas_t *cv)

switch(action)
{
case INIT:
case PREPARE:
width = cucul_get_canvas_width(cv);
height = cucul_get_canvas_height(cv);
screen = malloc(width * height);
memset(screen, 0, width * height);
for(i = 0; i < ANTS; i++)
{
ax[i] = cucul_rand(0, width);
@@ -521,6 +592,11 @@ void langton(enum action action, cucul_canvas_t *cv)
}
break;

case INIT:
screen = malloc(width * height);
memset(screen, 0, width * height);
break;

case UPDATE:
for(i = 0; i < ITER; i++)
{
@@ -551,7 +627,7 @@ void langton(enum action action, cucul_canvas_t *cv)
}
break;

case DRAW:
case RENDER:
for(y = 0; y < height; y++)
{
for(x = 0; x < width; x++)
@@ -593,7 +669,7 @@ void matrix(enum action action, cucul_canvas_t *cv)

switch(action)
{
case INIT:
case PREPARE:
for(i = 0; i < MAXDROPS; i++)
{
drop[i].x = cucul_rand(0, 1000);
@@ -605,6 +681,9 @@ void matrix(enum action action, cucul_canvas_t *cv)
}
break;

case INIT:
break;

case UPDATE:
w = cucul_get_canvas_width(cv);
h = cucul_get_canvas_height(cv);
@@ -620,7 +699,7 @@ void matrix(enum action action, cucul_canvas_t *cv)
}
break;

case DRAW:
case RENDER:
cucul_set_color(cv, CUCUL_COLOR_BLACK, CUCUL_COLOR_BLACK);
cucul_clear_canvas(cv);



Write Preview
Loading…
Cancel
Save