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Print out image at double the solution, using IBM character 223.

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This commit is contained in:
Bram 2018-04-19 11:12:50 -07:00
parent 6336890754
commit 84918b2037
1 changed files with 56 additions and 3 deletions
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59
imcat.c
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@ -15,6 +15,7 @@
#include "stb_image.h" #include "stb_image.h"
static int termw=0, termh=0; static int termw=0, termh=0;
static int doubleres=0;
#if defined(_WIN64) #if defined(_WIN64)
# include <windows.h> # include <windows.h>
@ -27,13 +28,17 @@ static void get_terminal_size(void)
termh = info.dwSize.Y; termh = info.dwSize.Y;
if ( !termw ) termw = 80; if ( !termw ) termw = 80;
} }
static int oldcodepage=0;
static void set_console_mode(void) static void set_console_mode(void)
{ {
int mode=0; DWORD mode=0;
const HANDLE hStdout = GetStdHandle( STD_OUTPUT_HANDLE ); const HANDLE hStdout = GetStdHandle( STD_OUTPUT_HANDLE );
GetConsoleMode( hStdout, &mode ); GetConsoleMode( hStdout, &mode );
mode = mode | ENABLE_VIRTUAL_TERMINAL_PROCESSING; mode = mode | ENABLE_VIRTUAL_TERMINAL_PROCESSING;
SetConsoleMode( hStdout, mode ); SetConsoleMode( hStdout, mode );
oldcodepage = GetConsoleCP();
SetConsoleCP( 437 );
doubleres = 1;
} }
#else #else
static void get_terminal_size(void) static void get_terminal_size(void)
@ -56,7 +61,7 @@ static void set_console_mode() {}
#define RESETALL "\x1b[0m" #define RESETALL "\x1b[0m"
static void print_image( int w, int h, unsigned char* data ) static void print_image_single_res( int w, int h, unsigned char* data )
{ {
const int linesz = 16384; const int linesz = 16384;
char line[ linesz ]; char line[ linesz ];
@ -84,6 +89,47 @@ static void print_image( int w, int h, unsigned char* data )
} }
static void print_image_double_res( int w, int h, unsigned char* data )
{
if ( h & 1 )
h--;
const int linesz = 32768;
char line[ linesz ];
for ( int y=0; y<h; y+=2 )
{
const unsigned char* row0 = data + (y+0) * w * 4;
const unsigned char* row1 = data + (y+1) * w * 4;
line[0] = 0;
for ( int x=0; x<w; ++x )
{
// foreground colour.
strncat( line, "\x1b[38;2;", sizeof(line) - strlen(line) - 1 );
char tripl[80];
unsigned char r = *row0++;
unsigned char g = *row0++;
unsigned char b = *row0++;
unsigned char a = *row0++;
(void) a;
snprintf( tripl, sizeof(tripl), "%d;%d;%dm", r,g,b );
strncat( line, tripl, sizeof(line) - strlen(line) - 1 );
// background colour.
strncat( line, "\x1b[48;2;", sizeof(line) - strlen(line) - 1 );
r = *row1++;
g = *row1++;
b = *row1++;
a = *row1++;
(void) a;
snprintf( tripl, sizeof(tripl), "%d;%d;%dm\xdf", r,g,b );
strncat( line, tripl, sizeof(line) - strlen(line) - 1 );
}
strncat( line, RESETALL, sizeof(line) - strlen(line) - 1 );
puts( line );
}
}
static int process_image( const char* nm ) static int process_image( const char* nm )
{ {
int imw=0,imh=0,n=0; int imw=0,imh=0,n=0;
@ -140,7 +186,10 @@ static int process_image( const char* nm )
stbi_image_free( data ); stbi_image_free( data );
data = 0; data = 0;
print_image( outw, outh, (unsigned char*) out ); if ( doubleres )
print_image_double_res( outw, outh, (unsigned char*) out );
else
print_image_single_res( outw, outh, (unsigned char*) out );
return 0; return 0;
} }
@ -169,6 +218,10 @@ int main( int argc, char* argv[] )
fprintf( stderr, "Could not load image %s\n", nm ); fprintf( stderr, "Could not load image %s\n", nm );
} }
#if defined(_WIN64)
SetConsoleCP( oldcodepage );
#endif
return 0; return 0;
} }