jaseg/matelight
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Added some doc

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This commit is contained in:
jaseg 2014-01-03 03:03:47 +01:00
parent e2735ee530
commit 3fd92ee838
1 changed files with 10 additions and 2 deletions
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12
host/matelight/main.c
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@ -11,7 +11,8 @@
#include <sys/timeb.h>
#include <unistd.h>
/* CAUTION: REQUIRES INPUT TO BE \0-TERMINATED */
// CAUTION: REQUIRES INPUT TO BE \0-TERMINATED
// ...also, it does a hardcodes setlocale of LC_CTYPE to en_US.utf8 for... reasons.
int console_render(char *s, glyph_t **glyph_table, unsigned int glyph_table_size){
unsigned int len = strlen(s);
@ -20,6 +21,7 @@ int console_render(char *s, glyph_t **glyph_table, unsigned int glyph_table_size
unsigned int gbufheight = 0;
char *p = s;
// Calculate screen width of string prior to allocating memory for the frame buffer
wchar_t c;
mbstate_t ps = {0};
memset(&ps, 0, sizeof(mbstate_t));
@ -92,11 +94,13 @@ int console_render(char *s, glyph_t **glyph_table, unsigned int glyph_table_size
} style = {
colortable[DEFAULT_FG_COLOR], colortable[DEFAULT_BG_COLOR], 0, 0, 0, 0, 0, 0
};
// Render glyphs (now with escape sequence rendering!)
for(;;){
// NOTE: This nested escape sequence parsing does not contain any unicode-awareness whatsoever
if(*p == '\033'){ // Escape sequence YAY
char *sequence_start = ++p;
if(*p == '['){ // This was a CSI!
// Disassemble the list of numbers, only accept SGR sequences (those ending with 'm')
long elems[MAX_CSI_ELEMENTS];
int nelems;
for(nelems = 0; nelems<MAX_CSI_ELEMENTS; nelems++){
@ -122,6 +126,7 @@ int console_render(char *s, glyph_t **glyph_table, unsigned int glyph_table_size
fprintf(stderr, "Unsupported escape sequence: \"\\e%s\"\n", sequence_start);
goto error;
}
// Parse the sequence numbers
for(int i=0; i<nelems; i++){
switch(elems[i]){
case 0: // reset style
@ -252,6 +257,7 @@ int console_render(char *s, glyph_t **glyph_table, unsigned int glyph_table_size
break;
p += inc;
// Render glyph into frame buffer
struct timeb time = {0};
ftime(&time);
unsigned long int t = time.time*1000 + time.millitm;
@ -276,13 +282,15 @@ int console_render(char *s, glyph_t **glyph_table, unsigned int glyph_table_size
x += g->width;
}
// Render framebuffer to terminal, two pixels per character using Unicode box drawing stuff
color_t lastfg = {0, 0, 0}, lastbg = {0, 0, 0};
printf("\e[38;5;0;48;5;0m");
for(unsigned int y=0; y < gbufheight; y+=2){
for(unsigned int x=0; x < gbufwidth; x++){
//Da magicks: ▀█▄
// Da magicks: ▀█▄
color_t ct = *((color_t *)(gbuf + (y*gbufwidth + x)*3)); // Top pixel
color_t cb = *((color_t *)(gbuf + ((y+1)*gbufwidth + x)*3)); // Bottom pixel
// The following, rather convoluted logic tries to "save" escape sequences when rendering.
if(!memcmp(&ct, &lastfg, sizeof(color_t))){
if(!memcmp(&cb, &lastbg, sizeof(color_t))){
printf("▀");