/*
* cacaview image viewer for libcaca
* Copyright (c) 2003 Sam Hocevar <sam@zoy.org>
* All Rights Reserved
*
* $Id$
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA
*/
#include "config.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#if defined(HAVE_IMLIB2_H)
# include <Imlib2.h>
#else
# include <stdio.h>
#endif
#if defined(HAVE_SLEEP)
# include <windows.h>
#endif
#include "caca.h"
/* Local macros */
#define STATUS_DITHERING 1
#define STATUS_ANTIALIASING 2
#define STATUS_BACKGROUND 3
/* Local functions */
static void load_image(char const *);
static void unload_image(void);
static void draw_checkers(unsigned int, unsigned int,
unsigned int, unsigned int);
#if !defined(HAVE_IMLIB2_H)
static int freadint(FILE *);
static int freadshort(FILE *);
static int freadchar(FILE *);
#endif
/* Local variables */
#if defined(HAVE_IMLIB2_H)
Imlib_Image image = NULL;
#endif
char *pixels = NULL;
struct caca_bitmap *bitmap = NULL;
int x, y;
unsigned int w, h, depth, bpp, rmask, gmask, bmask, amask;
#if !defined(HAVE_IMLIB2_H)
unsigned int red[256], green[256], blue[256], alpha[256];
#endif
int main(int argc, char **argv)
{
int quit = 0, update = 1, help = 0, fullscreen = 0, status = 0;
int reload = 0, zoom = 0;
char **list = NULL;
int current = 0, items = 0, opts = 1;
int i;
/* Initialise libcaca */
if(caca_init())
{
fprintf(stderr, "%s: unable to initialise libcaca\n", argv[0]);
return 1;
}
/* Set the window title */
caca_set_title("cacaview");
/* Load items into playlist */
for(i = 1; i < argc; i++)
{
/* Skip options except after `--' */
if(opts && argv[i][0] == '-')
{
if(argv[i][1] == '-' && argv[i][2] == '\0')
opts = 0;
continue;
}
/* Add argv[i] to the list */
if(items)
list = realloc(list, (items + 1) * sizeof(char *));
else
list = malloc(sizeof(char *));
list[items] = argv[i];
items++;
reload = 1;
}
/* Go ! */
while(!quit)
{
int ww = caca_get_width();
int wh = caca_get_height();
unsigned int event, new_status = 0, new_help = 0;
if(update)
event = caca_get_event(CACA_EVENT_KEY_PRESS);
else
event = caca_wait_event(CACA_EVENT_KEY_PRESS);
while(event)
{
unsigned int key = event & 0x00ffffff;
switch(key)
{
case 'n':
case 'N':
if(items) current = (current + 1) % items;
reload = 1;
break;
case 'p':
case 'P':
if(items) current = (items + current - 1) % items;
reload = 1;
break;
case 'f':
case 'F':
fullscreen = ~fullscreen;
update = 1;
break;
case 'b':
i = 1 + caca_get_feature(CACA_BACKGROUND);
if(i > CACA_BACKGROUND_MAX) i = CACA_BACKGROUND_MIN;
caca_set_feature(i);
new_status = STATUS_BACKGROUND;
update = 1;
break;
case 'B':
i = -1 + caca_get_feature(CACA_BACKGROUND);
if(i < CACA_BACKGROUND_MIN) i = CACA_BACKGROUND_MAX;
caca_set_feature(i);
new_status = STATUS_BACKGROUND;
update = 1;
break;
case 'a':
i = 1 + caca_get_feature(CACA_ANTIALIASING);
if(i > CACA_ANTIALIASING_MAX) i = CACA_ANTIALIASING_MIN;
caca_set_feature(i);
new_status = STATUS_ANTIALIASING;
update = 1;
break;
case 'A':
i = -1 + caca_get_feature(CACA_ANTIALIASING);
if(i < CACA_ANTIALIASING_MIN) i = CACA_ANTIALIASING_MAX;
caca_set_feature(i);
new_status = STATUS_ANTIALIASING;
update = 1;
break;
case 'd':
i = 1 + caca_get_feature(CACA_DITHERING);
if(i > CACA_DITHERING_MAX) i = CACA_DITHERING_MIN;
caca_set_feature(i);
new_status = STATUS_DITHERING;
update = 1;
break;
case 'D':
i = -1 + caca_get_feature(CACA_DITHERING);
if(i < CACA_DITHERING_MIN) i = CACA_DITHERING_MAX;
caca_set_feature(i);
new_status = STATUS_DITHERING;
update = 1;
break;
case '+':
zoom++;
if(zoom > 48) zoom = 48; else update = 1;
break;
case '-':
zoom--;
if(zoom < -48) zoom = -48; else update = 1;
break;
case 'x':
case 'X':
zoom = 0;
update = 1;
break;
case 'k':
case 'K':
case CACA_KEY_UP:
if(zoom > 0) y -= 1 + h / (2 + zoom) / 8;
update = 1;
break;
case 'j':
case 'J':
case CACA_KEY_DOWN:
if(zoom > 0) y += 1 + h / (2 + zoom) / 8;
update = 1;
break;
case 'h':
case 'H':
case CACA_KEY_LEFT:
if(zoom > 0) x -= 1 + w / (2 + zoom) / 8;
update = 1;
break;
case 'l':
case 'L':
case CACA_KEY_RIGHT:
if(zoom > 0) x += 1 + w / (2 + zoom) / 8;
update = 1;
break;
case '?':
new_help = !help;
update = 1;
break;
case 'q':
case 'Q':
quit = 1;
break;
}
if(status || new_status)
status = new_status;
if(help || new_help)
help = new_help;
event = caca_get_event(CACA_EVENT_KEY_PRESS);
}
if(items && reload)
{
char *buffer;
int len = strlen(" Loading `%s'... ") + strlen(list[current]);
if(len < ww + 1)
len = ww + 1;
buffer = malloc(len);
/* Reset image-specific runtime variables */
zoom = 0;
sprintf(buffer, " Loading `%s'... ", list[current]);
buffer[ww] = '\0';
caca_set_color(CACA_COLOR_WHITE, CACA_COLOR_BLUE);
caca_putstr((ww - strlen(buffer)) / 2, wh / 2, buffer);
caca_refresh();
unload_image();
load_image(list[current]);
reload = 0;
update = 1;
free(buffer);
}
caca_clear();
if(!items)
{
caca_set_color(CACA_COLOR_WHITE, CACA_COLOR_BLUE);
caca_printf(ww / 2 - 5, wh / 2, " No image. ");
}
else if(!pixels)
{
#if defined(HAVE_IMLIB2_H)
# define ERROR_STRING " Error loading `%s'. "
#else
# define ERROR_STRING " Error loading `%s'. Only BMP is supported. "
#endif
char *buffer;
int len = strlen(ERROR_STRING) + strlen(list[current]);
if(len < ww + 1)
len = ww + 1;
buffer = malloc(len);
sprintf(buffer, ERROR_STRING, list[current]);
buffer[ww] = '\0';
caca_set_color(CACA_COLOR_WHITE, CACA_COLOR_BLUE);
caca_putstr((ww - strlen(buffer)) / 2, wh / 2, buffer);
free(buffer);
}
else if(zoom < 0)
{
int xo = (ww - 1) / 2;
int yo = (wh - 1) / 2;
int xn = (ww - 1) / (2 - zoom);
int yn = (wh - 1) / (2 - zoom);
draw_checkers(xo - xn, yo - yn, xo + xn, yo + yn);
caca_draw_bitmap(xo - xn, yo - yn, xo + xn, yo + yn,
bitmap, pixels);
}
else if(zoom > 0)
{
struct caca_bitmap *newbitmap;
int xn = w / (2 + zoom);
int yn = h / (2 + zoom);
if(x < xn) x = xn;
if(y < yn) y = yn;
if(xn + x > (int)w) x = w - xn;
if(yn + y > (int)h) y = h - yn;
newbitmap = caca_create_bitmap(bpp, 2 * xn, 2 * yn, depth * w,
rmask, gmask, bmask, amask);
#if !defined(HAVE_IMLIB2_H)
if(bpp == 8)
caca_set_bitmap_palette(newbitmap, red, green, blue, alpha);
#endif
draw_checkers(0, fullscreen ? 0 : 1,
ww - 1, fullscreen ? wh - 1 : wh - 3);
caca_draw_bitmap(0, fullscreen ? 0 : 1,
ww - 1, fullscreen ? wh - 1 : wh - 3,
newbitmap,
pixels + depth * (x - xn) + depth * w * (y - yn));
caca_free_bitmap(newbitmap);
}
else
{
draw_checkers(0, fullscreen ? 0 : 1,
ww - 1, fullscreen ? wh - 1 : wh - 3);
caca_draw_bitmap(0, fullscreen ? 0 : 1,
ww - 1, fullscreen ? wh - 1 : wh - 3,
bitmap, pixels);
}
if(!fullscreen)
{
caca_set_color(CACA_COLOR_WHITE, CACA_COLOR_BLUE);
caca_draw_line(0, 0, ww - 1, 0, ' ');
caca_draw_line(0, wh - 2, ww - 1, wh - 2, '-');
caca_putstr(0, 0, "q:Quit np:Next/Prev +-x:Zoom "
"hjkl:Move d:Dithering a:Antialias");
caca_putstr(ww - strlen("?:Help"), 0, "?:Help");
caca_printf(3, wh - 2, "cacaview %s", VERSION);
caca_printf(ww - 14, wh - 2,
"(zoom: %s%i)", zoom > 0 ? "+" : "", zoom);
caca_set_color(CACA_COLOR_LIGHTGRAY, CACA_COLOR_BLACK);
caca_draw_line(0, wh - 1, ww - 1, wh - 1, ' ');
switch(status)
{
case STATUS_ANTIALIASING:
caca_printf(0, wh - 1, "Antialiasing: %s",
caca_get_feature_name(caca_get_feature(CACA_ANTIALIASING)));
break;
case STATUS_DITHERING:
caca_printf(0, wh - 1, "Dithering: %s",
caca_get_feature_name(caca_get_feature(CACA_DITHERING)));
break;
case STATUS_BACKGROUND:
caca_printf(0, wh - 1, "Background: %s",
caca_get_feature_name(caca_get_feature(CACA_BACKGROUND)));
break;
}
}
if(help)
{
caca_set_color(CACA_COLOR_WHITE, CACA_COLOR_BLUE);
caca_putstr(ww - 25, 2, " +: zoom in ");
caca_putstr(ww - 25, 3, " -: zoom out ");
caca_putstr(ww - 25, 4, " x: reset zoom ");
caca_putstr(ww - 25, 5, " ---------------------- ");
caca_putstr(ww - 25, 6, " hjkl: move view ");
caca_putstr(ww - 25, 7, " arrows: move view ");
caca_putstr(ww - 25, 8, " ---------------------- ");
caca_putstr(ww - 25, 9, " a: antialiasing method ");
caca_putstr(ww - 25, 10, " d: dithering method ");
caca_putstr(ww - 25, 11, " b: background mode ");
caca_putstr(ww - 25, 12, " ---------------------- ");
caca_putstr(ww - 25, 13, " ?: help ");
caca_putstr(ww - 25, 14, " q: quit ");
}
caca_refresh();
update = 0;
}
/* Clean up */
unload_image();
caca_end();
return 0;
}
static void unload_image(void)
{
#if defined(HAVE_IMLIB2_H)
if(image)
imlib_free_image();
image = NULL;
pixels = NULL;
#else
if(pixels)
free(pixels);
pixels = NULL;
#endif
if(bitmap)
caca_free_bitmap(bitmap);
bitmap = NULL;
}
static void load_image(char const *name)
{
#if defined(HAVE_IMLIB2_H)
/* Load the new image */
image = imlib_load_image(name);
if(!image)
return;
imlib_context_set_image(image);
pixels = (char *)imlib_image_get_data_for_reading_only();
w = imlib_image_get_width();
h = imlib_image_get_height();
rmask = 0x00ff0000;
gmask = 0x0000ff00;
bmask = 0x000000ff;
amask = 0xff000000;
bpp = 32;
depth = 4;
/* Create the libcaca bitmap */
bitmap = caca_create_bitmap(bpp, w, h, depth * w,
rmask, gmask, bmask, amask);
if(!bitmap)
{
imlib_free_image();
image = NULL;
}
#else
/* Try to load a BMP file */
FILE *fp;
unsigned int i, colors, offset, tmp, planes;
fp = fopen(name, "rb");
if(!fp)
return;
if(freadshort(fp) != 0x4d42)
{
fclose(fp);
return;
}
freadint(fp); /* size */
freadshort(fp); /* reserved 1 */
freadshort(fp); /* reserved 2 */
offset = freadint(fp);
tmp = freadint(fp); /* header size */
if(tmp == 40)
{
w = freadint(fp);
h = freadint(fp);
planes = freadshort(fp);
bpp = freadshort(fp);
tmp = freadint(fp); /* compression */
if(tmp != 0)
{
fclose(fp);
return;
}
freadint(fp); /* sizeimage */
freadint(fp); /* xpelspermeter */
freadint(fp); /* ypelspermeter */
freadint(fp); /* biclrused */
freadint(fp); /* biclrimportantn */
colors = (offset - 54) / 4;
for(i = 0; i < colors && i < 256; i++)
{
blue[i] = freadchar(fp) * 16;
green[i] = freadchar(fp) * 16;
red[i] = freadchar(fp) * 16;
alpha[i] = 0;
freadchar(fp);
}
}
else if(tmp == 12)
{
w = freadint(fp);
h = freadint(fp);
planes = freadshort(fp);
bpp = freadshort(fp);
colors = (offset - 26) / 3;
for(i = 0; i < colors && i < 256; i++)
{
blue[i] = freadchar(fp);
green[i] = freadchar(fp);
red[i] = freadchar(fp);
alpha[i] = 0;
}
}
else
{
fclose(fp);
return;
}
/* Fill the rest of the palette */
for(i = colors; i < 256; i++)
blue[i] = green[i] = red[i] = alpha[i] = 0;
depth = (bpp + 7) / 8;
/* Sanity check */
if(!w || w > 0x10000 || !h || h > 0x10000 || planes != 1 /*|| bpp != 24*/)
{
fclose(fp);
return;
}
/* Allocate the pixel buffer */
pixels = malloc(w * h * depth);
if(!pixels)
{
fclose(fp);
return;
}
memset(pixels, 0, w * h * depth);
/* Read the bitmap data */
for(i = h; i--; )
{
unsigned int j, k, bits = 0;
switch(bpp)
{
case 1:
for(j = 0; j < w; j++)
{
k = j % 32;
if(k == 0)
bits = freadint(fp);
pixels[w * i * depth + j] =
(bits >> ((k & ~0xf) + 0xf - (k & 0xf))) & 0x1;
}
break;
case 4:
for(j = 0; j < w; j++)
{
k = j % 8;
if(k == 0)
bits = freadint(fp);
pixels[w * i * depth + j] =
(bits >> (4 * ((k & ~0x1) + 0x1 - (k & 0x1)))) & 0xf;
}
break;
default:
/* Works for 8bpp, but also for 16, 24 etc. */
fread(pixels + w * i * depth, w * depth, 1, fp);
/* Pad reads to 4 bytes */
tmp = (w * depth) % 4;
tmp = (4 - tmp) % 4;
while(tmp--)
freadchar(fp);
break;
}
}
switch(depth)
{
case 3:
rmask = 0xff0000;
gmask = 0x00ff00;
bmask = 0x0000ff;
amask = 0x000000;
break;
case 2: /* XXX: those are the 16 bits values */
rmask = 0x7c00;
gmask = 0x03e0;
bmask = 0x001f;
amask = 0x0000;
break;
case 1:
default:
bpp = 8;
rmask = gmask = bmask = amask = 0;
break;
}
fclose(fp);
/* Create the libcaca bitmap */
bitmap = caca_create_bitmap(bpp, w, h, depth * w,
rmask, gmask, bmask, amask);
if(!bitmap)
{
free(pixels);
pixels = NULL;
return;
}
if(bpp == 8)
caca_set_bitmap_palette(bitmap, red, green, blue, alpha);
#endif
x = w / 2;
y = h / 2;
}
static void draw_checkers(unsigned int x1, unsigned int y1,
unsigned int x2, unsigned int y2)
{
unsigned int xn, yn;
for(yn = y1; yn <= y2; yn++)
for(xn = x1; xn <= x2; xn++)
{
if((((xn - x1) / 5) ^ ((yn - y1) / 3)) & 1)
caca_set_color(CACA_COLOR_LIGHTGRAY, CACA_COLOR_DARKGRAY);
else
caca_set_color(CACA_COLOR_DARKGRAY, CACA_COLOR_LIGHTGRAY);
caca_putchar(xn, yn, ' ');
}
}
#if !defined(HAVE_IMLIB2_H)
static int freadint(FILE *fp)
{
unsigned char buffer[4];
fread(buffer, 4, 1, fp);
return ((int)buffer[3] << 24) | ((int)buffer[2] << 16)
| ((int)buffer[1] << 8) | ((int)buffer[0]);
}
static int freadshort(FILE *fp)
{
unsigned char buffer[2];
fread(buffer, 2, 1, fp);
return ((int)buffer[1] << 8) | ((int)buffer[0]);
}
static int freadchar(FILE *fp)
{
unsigned char buffer;
fread(&buffer, 1, 1, fp);
return (int)buffer;
}
#endif