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aview/ui.c

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#include <stdio.h>
#include <ctype.h>
#include <malloc.h>
#include <string.h>
#include <aalib.h>
#include "shrink.h"
#include "image.h"
aa_context *context;
aa_renderparams *renderparams;
static int x1, y1, x2, y2;
static int fast = 1;
static int resized;
static char getletter(int i)
{
if(i<9) return('1'+i);
if(i==9) return('0');
if(i>9) return('A'+i-10);
}
static void do_display(void)
{
aa_puts(context, 0, 0, AA_SPECIAL, "Calculating..");
aa_flush(context);
shrink(context, fast, x1, y1, x2, y2);
aa_render(context, renderparams, 0, 0, aa_scrwidth(context), aa_scrheight(context));
aa_flush(context);
}
static void resize(aa_context * c)
{
aa_resize(c);
resized = 1;
do_display();
}
static int yesno(int x, int y, char *string)
{
char c;
aa_puts(context, x, y, AA_SPECIAL, string);
aa_flush(context);
while ((c = tolower(aa_getkey(context, 1))) != 'y' && c != 'n');
return (c == 'y');
}
static int getnum(char *string)
{
unsigned char c;
aa_puts(context, 0, 0, AA_SPECIAL, string);
aa_flush(context);
while (((c = tolower(aa_getkey(context, 1))) < '0' || c > '9') && (c<'A' || c>'Z') && (c<'a' || c>'z'));
if(c=='0') return 9;
if(c<='9'&&c>='1') return (c-'1');
if(c>='a'&&c<='z') return (c-'a'+10);
if(c>='A'&&c<='Z') return (c-'A'+10);
return (c - '0');
}
static void selectfont(aa_context * c)
{
int i = 0, i1;
char string[255];
for (i = 0; aa_fonts[i] != NULL; i++) {
sprintf(string, "%c - %-40s", getletter(i), aa_fonts[i]->name);
aa_puts(context, 0, i, AA_SPECIAL, string);
}
i1 = getnum("");
if (i1 < i)
aa_setfont(c, *(aa_fonts + i1));
}
#if AA_LIB_VERSION==1 && AA_LIB_MINNOR==0
#define SUPPORTED c->driver->params.supported
#else
#define SUPPORTED c->driverparams.supported
#endif
static void selectsupported(aa_context * c)
{
int supported = c->params.supported;
char text[40];
int ch;
do {
static char *texts[] =
{
"Normal characters",
"Half bright (dim)",
"Double bright (bold)",
"Bold font",
"Reversed",
"8 bit ascii",
"Control characters"};
int masks[] =
{AA_NORMAL_MASK, AA_DIM_MASK, AA_BOLD_MASK, AA_BOLDFONT_MASK, AA_REVERSE_MASK, AA_EIGHT, AA_ALL};
int i;
for (i = 0; i < 7; i++) {
sprintf(text, "%i %-20s:%-12s", i + 1, texts[i], (SUPPORTED & masks[i]) ? ((supported & masks[i]) ? "On" : "Off") : "Unsupported");
aa_puts(context, 0, i, AA_SPECIAL, text);
}
aa_puts(context, 0, i, AA_SPECIAL, "8 Leave this menu");
aa_flush(context);
while ((ch = tolower(aa_getkey(context, 1))) < '1' || ch > '8');
ch -= '1';
if (ch < 7)
supported ^= masks[ch];
} while (ch < 7);
aa_setsupported(c, supported);
}
static void save(void)
{
int i = 0, i1;
struct aa_savedata data;
aa_context *c;
char string[255];
char name[256];
for (i = 0; aa_formats[i] != NULL; i++) {
sprintf(string, "%c - %-40s", getletter(i), aa_formats[i]->formatname);
aa_puts(context, 0, i, AA_SPECIAL, string);
}
while ((i1 = getnum("")) >= i);
do_display();
data.format = aa_formats[i1];
if (data.format->flags & AA_USE_PAGES) {
sprintf(string, "Page size is:%ix%i", data.format->pagewidth, data.format->pageheight);
aa_puts(context, 0, 0, AA_SPECIAL, string);
}
aa_puts(context, 0, 1, AA_SPECIAL, "Width of image:");
sprintf(string, "%i", data.format->width);
do {
aa_edit(context, 0, 2, 5, string, 256);
} while (sscanf(string, "%i", &aa_defparams.width) != 1 || aa_defparams.width <= 0 || aa_defparams.width >= 65000);
aa_puts(context, 0, 3, AA_SPECIAL, "Height of image:");
sprintf(string, "%i", data.format->height);
do {
aa_edit(context, 0, 4, 5, string, 256);
} while (sscanf(string, "%i", &aa_defparams.height) != 1 || aa_defparams.height <= 0 || aa_defparams.height >= 65000);
name[0] = 0;
data.name = name;
aa_puts(context, 0, 5, AA_SPECIAL, "Filename:");
aa_edit(context, 0, 6, 20, name, 256);
strcat(name,"%c%e");
do_display();
aa_defparams.minwidth = 0;
aa_defparams.minheight = 0;
aa_defparams.maxwidth = 0;
aa_defparams.maxheight = 0;
c = aa_init(&save_d, &aa_defparams, &data);
if (c == NULL) {
return;
}
if (data.format->font == NULL)
selectfont(c);
else
aa_setfont(c, data.format->font);
do_display();
selectsupported(c);
do_display();
aa_gotoxy(context, 0, 0);
if (yesno(0, 0, "Save just current view? "))
shrink(c, fast, x1, y1, x2, y2);
else
shrink(c, fast, 0, 0, imgwidth, imgheight);
aa_puts(context, 0, 1, AA_SPECIAL, "saving..");
aa_flush(context);
aa_render(c, renderparams, 0, 0, aa_scrwidth(c), aa_scrheight(c));
aa_flush(c);
aa_close(c);
do_display();
}
static void ui_help(void)
{
aa_puts(context, 0, 1, AA_SPECIAL, " asciiarted image viewer by Jan Hubicka ");
aa_puts(context, 0, 2, AA_SPECIAL, " a,w,d,x - move image one row/column A,W,D,X - move image one page");
aa_puts(context, 0, 3, AA_SPECIAL, " z - unzoom Z - zoom ");
aa_puts(context, 0, 4, AA_SPECIAL, " s - Save image ");
aa_puts(context, 0, 5, AA_SPECIAL, " m - change dithering mode q - quit ");
aa_puts(context, 0, 6, AA_SPECIAL, " i - turns inversion on I - intversion off ");
aa_puts(context, 0, 7, AA_SPECIAL, " u - select attributes f - select font ");
aa_puts(context, 0, 8, AA_SPECIAL, " space - redraw ',','.' - change contrast ");
aa_puts(context, 0, 9, AA_SPECIAL, " ';',''' - change gamma '<','>' - change bright ");
aa_puts(context, 0, 10, AA_SPECIAL, " '+','-' - zoom/unzoom '<','>' - change bright ");
}
void main_loop(void)
{
int c, i;
int quit = 0;
char string[255];
float xmul = ((float) aa_mmheight(context)) / aa_mmwidth(context);
float ymul = ((float) aa_mmwidth(context)) / aa_mmheight(context);
resized = 1;
renderparams = aa_getrenderparams();
aa_resizehandler(context, resize);
while (!quit) {
if (resized) {
xmul = ((float) aa_mmheight(context)) / aa_mmwidth(context);
ymul = ((float) aa_mmwidth(context)) / aa_mmheight(context);
x1 = 0;
y1 = 0;
x2 = imgwidth;
y2 = imgheight;
if (imgwidth * xmul > imgheight)
y2 = imgwidth * xmul;
else
x2 = imgheight * ymul;
x1 = (imgwidth - x2) / 2;
x2 += x1;
y1 = (imgheight - y2) / 2;
y2 += y1;
do_display();
resized = 0;
}
aa_flush(context);
c = aa_getevent(context, 1);
switch (c) {
case 'h':
ui_help();
break;
case 'z':
x1 = 0;
y1 = 0;
x2 = aa_imgwidth(context);
y2 = aa_imgwidth(context) * xmul;
do_display();
break;
case 'Z':
x1 = 0;
y1 = 0;
x2 = imgwidth;
y2 = imgheight;
if (imgwidth * xmul > imgheight)
y2 = imgwidth * xmul;
else
x2 = imgheight * ymul;
do_display();
break;
case 'd':
if (x2 < imgwidth - 1) {
x1 += context->mulx;
x2 += context->muly;
do_display();
}
break;
case AA_RIGHT:
case 'D':
{
int step = (x2 - x1) / 5;
if (x2 < imgwidth - step) {
x1 += step;
x2 += step;
} else {
x1 = imgwidth - x2 + x1;
x2 = imgwidth;
}
}
do_display();
break;
case 'a':
if (x1 > 1) {
x1 -= context->mulx;
x2 -= context->muly;
do_display();
}
break;
case AA_LEFT:
case 'A':
{
int step = (x2 - x1) / 5;
if (x1 > step) {
x1 -= step;
x2 -= step;
} else {
x2 = x2 - x1;
x1 = 0;
}
do_display();
}
break;
case 'x':
if (y2 < imgheight - 1) {
y1 += context->mulx;
y2 += context->muly;
do_display();
}
break;
case AA_DOWN:
case 'X':
{
int step = (y2 - y1) / 5;
if (y2 < imgheight - step) {
y1 += step;
y2 += step;
} else {
y1 = imgheight - y2 + y1;
y2 = imgheight;
}
}
do_display();
break;
case 'w':
if (y1 > 2) {
y1 -= context->mulx;
y2 -= context->muly;
}
do_display();
break;
case AA_UP:
case 'W':
{
int step = (y2 - y1) / 5;
if (y1 > step) {
y1 -= step;
y2 -= step;
} else {
y2 = y2 - y1;
y1 = 0;
}
}
do_display();
break;
case 'q':
quit = 1;
break;
case 'm':
renderparams->dither = (renderparams->dither + 1) % AA_DITHERTYPES;
do_display();
aa_puts(context, 0, 0, AA_SPECIAL, aa_dithernames[renderparams->dither]);
break;
case ' ':
do_display();
break;
case 'Q':{
renderparams->dither = AA_FLOYD_S;
do_display();
for (i = 2000; i > 5; i -= 7) {
renderparams->randomval = i;
aa_render(context, renderparams, 0, 0, aa_scrwidth(context), aa_scrheight(context));
aa_flush(context);
}
}
renderparams->dither = AA_FLOYD_S;
aa_render(context, renderparams, 0, 0, aa_scrwidth(context), aa_scrheight(context));
aa_flush(context);
break;
case 'E':{
do_display();
for (i = 0; i < 256; i += 50) {
renderparams->bright = i;
aa_render(context, renderparams, 0, 0, aa_scrwidth(context), aa_scrheight(context));
aa_flush(context);
}
}
renderparams->bright = 255;
aa_render(context, renderparams, 0, 0, aa_scrwidth(context), aa_scrheight(context));
aa_flush(context);
renderparams->bright = 0;
renderparams->dither = AA_FLOYD_S;
aa_render(context, renderparams, 0, 0, aa_scrwidth(context), aa_scrheight(context));
aa_flush(context);
break;
case 'R':{
do_display();
for (i = -256; i < 0; i += 5) {
renderparams->bright = i;
aa_render(context, renderparams, 0, 0, aa_scrwidth(context), aa_scrheight(context));
aa_flush(context);
}
}
renderparams->bright = 0;
aa_render(context, renderparams, 0, 0, aa_scrwidth(context), aa_scrheight(context));
aa_flush(context);
break;
case 'T':{
do_display();
for (i = -256; i < 256; i += 5) {
renderparams->bright = i;
aa_render(context, renderparams, 0, 0, aa_scrwidth(context), aa_scrheight(context));
aa_flush(context);
}
}
renderparams->bright = 0;
aa_render(context, renderparams, 0, 0, aa_scrwidth(context), aa_scrheight(context));
aa_flush(context);
break;
case 'i':
renderparams->inversion = 1;
do_display();
break;
case 'I':
renderparams->inversion = 0;
do_display();
break;
case 's':
save();
break;
case 'F':
fast = 1;
do_display();
break;
case 'f':
fast = 0;
do_display();
break;
case 'u':
selectsupported(context);
do_display();
break;
case 'g':
selectfont(context);
do_display();
break;
case ';':
renderparams->gamma /= 1.05;
do_display();
sprintf(string, "gamma:%f", renderparams->gamma);
aa_puts(context, 0, 0, AA_SPECIAL, string);
break;
case '\'':
renderparams->gamma *= 1.05;
do_display();
sprintf(string, "gamma:%f", renderparams->gamma);
aa_puts(context, 0, 0, AA_SPECIAL, string);
break;
case '<':
renderparams->bright -= 4;
do_display();
sprintf(string, "bright:%f", renderparams->bright / 255.0);
aa_puts(context, 0, 0, AA_SPECIAL, string);
break;
case '>':
renderparams->bright += 4;
do_display();
sprintf(string, "bright:%f", renderparams->bright / 255.0);
aa_puts(context, 0, 0, AA_SPECIAL, string);
break;
case '[':
renderparams->randomval -= 4;
do_display();
sprintf(string, "bright:%f", renderparams->bright / 255.0);
aa_puts(context, 0, 0, AA_SPECIAL, string);
break;
case ']':
renderparams->randomval += 4;
do_display();
sprintf(string, "bright:%f", renderparams->bright / 255.0);
aa_puts(context, 0, 0, AA_SPECIAL, string);
break;
case ',':
renderparams->contrast -= 2;
do_display();
sprintf(string, "contrast:%f", renderparams->contrast / 127.0);
aa_puts(context, 0, 0, AA_SPECIAL, string);
break;
case '.':
renderparams->contrast += 2;
do_display();
sprintf(string, "contrast:%f", renderparams->contrast / 127.0);
aa_puts(context, 0, 0, AA_SPECIAL, string);
break;
case '-':
{
int tmp = (x2 - x1 + 7) / 8;
x1 -= tmp;
x2 += tmp;
tmp = (y2 - y1) / 8;
y1 -= tmp;
y2 = y1 + (x2 - x1) * xmul;
do_display();
} break;
case '+':
{
int tmp = (x2 - x1) / 8;
x1 += tmp;
x2 -= tmp;
tmp = (y2 - y1) / 8;
y1 += tmp;
y2 = y1 + (x2 - x1) * xmul;
do_display();
} break;
}
}
}
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