gui_omsg.c

/*
 * See Licensing and Copyright notice in naev.h
 */
#include <stdlib.h>
 
#include "naev.h"
#include "gui_omsg.h"
 
#include "array.h"
#include "font.h"
#include "log.h"
#include "ndata.h"
#include "nstring.h"
#include "opengl.h"
 
typedef struct omsg_font_s {
   int size;      
   glFont font;   
} omsg_font_t;
static omsg_font_t *omsg_font_array = NULL; 
typedef struct omsg_s {
   unsigned int id;  
   char **msg;       
   double duration;  
   int font;         
   glColour col;     
} omsg_t;
static omsg_t *omsg_array           = NULL;  
static unsigned int omsg_idgen      = 0;     
static double omsg_center_x         = 0.;    
static double omsg_center_y         = 0.;    
static double omsg_center_w         = 100.;    
/*
 * Prototypes.
 */
static omsg_t* omsg_get( unsigned int id );
static void omsg_free( omsg_t *omsg );
static void omsg_setMsg( omsg_t *omsg, const char *msg );
static int omsg_getFontID( int size );
static glFont* omsg_getFont( int font );
 
static omsg_t* omsg_get( unsigned int id )
{
   for (int i=0; i<array_size(omsg_array); i++)
      if (omsg_array[i].id == id)
         return &omsg_array[i];
   return NULL;
}
 
static void omsg_free( omsg_t *omsg )
{
   for (int i=0; i<array_size(omsg->msg); i++)
      free( omsg->msg[i] );
   array_free( omsg->msg );
   omsg->msg = NULL;
}
 
static void omsg_setMsg( omsg_t *omsg, const char *msg )
{
   glFont *font;
   glPrintLineIterator iter;
 
   /* Clean up after old stuff. */
   omsg_free( omsg );
 
   /* Create data. */
   font = omsg_getFont( omsg->font );
 
   omsg->msg = array_create( char* );
   gl_printLineIteratorInit( &iter, font, msg, omsg_center_w );
   while (gl_printLineIteratorNext( &iter ))
      array_push_back( &omsg->msg, strndup( &iter.text[iter.l_begin], iter.l_end - iter.l_begin ) );
}
 
static int omsg_getFontID( int size )
{
   omsg_font_t *font;
 
   /* Create array if not done so yet. */
   if (omsg_font_array == NULL)
      omsg_font_array = array_create( omsg_font_t );
 
   /* Try to match. */
   for (int i=0; i<array_size( omsg_font_array ); i++)
      if (size == omsg_font_array[i].size)
         return i;
 
   /* Create font. */
   font = &array_grow( &omsg_font_array );
   gl_fontInit( &font->font, _(FONT_MONOSPACE_PATH), size, FONT_PATH_PREFIX, 0 );
   font->size = size;
   return array_size(omsg_font_array) - 1;
}
 
static glFont* omsg_getFont( int font )
{
   return &omsg_font_array[ font ].font;
}
 
void omsg_position( double center_x, double center_y, double width )
{
   omsg_center_x = center_x;
   omsg_center_y = center_y;
   omsg_center_w = width;
}
 
void omsg_cleanup (void)
{
   /* Free fonts. */
   for (int i=0; i<array_size( omsg_font_array ); i++)
      gl_freeFont( &omsg_font_array[i].font );
   array_free( omsg_font_array );
   omsg_font_array = NULL;
 
   /* Destroy messages. */
   for (int i=0; i<array_size(omsg_array); i++)
      omsg_free( &omsg_array[i] );
   array_free( omsg_array );
   omsg_array = NULL;
}
 
void omsg_render( double dt )
{
   double x, y;
 
   /* Case nothing to do. */
   if (omsg_array == NULL)
      return;
 
   /* Center. */
   x  = omsg_center_x - omsg_center_w/2.;
   y  = omsg_center_y;
 
   /* Render. */
   for (int i=0; i<array_size(omsg_array); i++) {
      omsg_t *omsg = &omsg_array[i];
 
      /* Render. */
      glFont *font = omsg_getFont( omsg->font );
      glColour col = omsg->col;
      if (omsg->duration < 1.)
         col.a = omsg->duration;
      gl_printRestoreClear();
      for (int j=0; j<array_size(omsg->msg); j++) {
         y -= font->h * 1.5;
         gl_printRestoreLast();
         gl_printMidRaw( font, omsg_center_w, x, y, &col, -1., omsg->msg[j] );
      }
 
      /* Check if time to erase. */
      omsg->duration -= dt;
      if (omsg->duration < 0.) {
         omsg_free( omsg );
         array_erase( &omsg_array, &omsg[0], &omsg[1] );
         i--;
         continue;
      }
   }
}
 
unsigned int omsg_add( const char *msg, double duration, int fontsize, const glColour *col )
{
   omsg_t *omsg;
   int font;
 
   /* Create if necessary. */
   if (omsg_array == NULL)
      omsg_array = array_create( omsg_t );
 
   /* Get font size. */
   font = omsg_getFontID( fontsize );
 
   /* Create the message. */
   omsg           = &array_grow( &omsg_array );
   memset( omsg, 0, sizeof(omsg_t) );
   omsg->id       = ++omsg_idgen;
   omsg->duration = duration;
   omsg->font     = font;
   omsg->col      = *col;
   omsg_setMsg( omsg, msg );
 
   return omsg->id;
}
 
int omsg_change( unsigned int id, const char *msg, double duration )
{
   omsg_t *omsg = omsg_get(id);
   if (omsg == NULL)
      return -1;
 
   omsg_setMsg( omsg, msg );
   omsg->duration = duration;
   return 0;
}
 
int omsg_exists( unsigned int id )
{
   return (omsg_get(id) != NULL);
}
 
void omsg_rm( unsigned int id )
{
   omsg_t *omsg = omsg_get(id);
   if (omsg == NULL)
      return;
 
   /* Destroy. */
   omsg_free( omsg );
   array_erase( &omsg_array, &omsg[0], &omsg[1] );
}