retrogxc.h

 
#ifndef RETROGXC_H
#define RETROGXC_H

 
#include <maug.h>
 
/* TODO: Unified asset type that automatically uses RetroGXC if present and
 *       directly loads assets to handles if not.
 *
 *       *or*
 *
 *       Loader function that passes back a pointer to the cached object
 *       to be used with the normal functions associated with it.
 */
 
/* TODO: The loaders here pass path to file-loading functions. What they
 *       *should* do is open those paths into mfiles on their own, so that
 *       a shim can be inserted to force loading from arrays in memory.
 */
 
#define RETROGXC_PRESENT 1
 
#undef retrogxc_cachable_is_loaded
#define retrogxc_cachable_is_loaded( cachable ) \
   (0 <= (cachable)->cache_idx)
 
#ifndef RETROGXC_INITIAL_SZ
#  define RETROGXC_INITIAL_SZ 16
#endif /* !RETROGXC_INITIAL_SZ */
 
#ifndef RETROGXC_TRACE_LVL
#  define RETROGXC_TRACE_LVL 0
#endif /* !RETROGXC_TRACE_LVL */
 
#define RETROGXC_ERROR_CACHE_MISS (-1)
 
#define RETROGXC_ASSET_TYPE_NONE    0
#define RETROGXC_ASSET_TYPE_BITMAP  1
#define RETROGXC_ASSET_TYPE_FONT    2
 
#define retrogxc_load_bitmap( res_p, flags ) \
   retrogxc_load_asset( res_p, retrogxc_loader_bitmap, NULL, flags )
 
typedef int8_t retrogxc_asset_type_t;
 
typedef retrogxc_asset_type_t (*retrogxc_loader)(
   const maug_path res_p, MAUG_MHANDLE* handle_p,
   void* data, uint8_t flags );
 
struct RETROFLAT_CACHE_ASSET {
   uint8_t type;
   MAUG_MHANDLE handle;
   maug_path id;
};
 
struct RETROGXC_FONT_PARMS {
   uint8_t glyph_h;
   uint16_t first_glyph;
   uint16_t glyphs_count;
};
 
MERROR_RETVAL retrogxc_init();
 
void retrogxc_clear_cache();
 
void retrogxc_shutdown();
 
retrogxc_asset_type_t retrogxc_loader_bitmap(
   const maug_path res_p, MAUG_MHANDLE* handle_p,
   void* data, uint8_t flags );
 
retrogxc_asset_type_t retrogxc_loader_xpm(
   const maug_path res_p, MAUG_MHANDLE* handle_p,
   void* data, uint8_t flags );
 
retrogxc_asset_type_t retrogxc_loader_font(
   const maug_path res_p, MAUG_MHANDLE* handle_p,
   void* data, uint8_t flags );
 
int16_t retrogxc_load_font(
   const maug_path font_name,
   uint8_t glyph_h, uint16_t first_glyph, uint16_t glyphs_count );

int16_t retrogxc_load_asset(
   const maug_path res_p, retrogxc_loader l, void* data,
   uint8_t flags );

MAUG_MHANDLE retrogxc_get_asset(
   size_t asset_idx, retrogxc_asset_type_t asset_type );
 
MERROR_RETVAL retrogxc_blit_bitmap(
   retroflat_blit_t* target, size_t bitmap_idx,
   retroflat_pxxy_t s_x, retroflat_pxxy_t s_y,
   retroflat_pxxy_t d_x, retroflat_pxxy_t d_y,
   retroflat_pxxy_t w, retroflat_pxxy_t h, int16_t instance );
 
MERROR_RETVAL retrogxc_bitmap_wh(
   size_t bitmap_idx, retroflat_pxxy_t* p_w, retroflat_pxxy_t* p_h );
 
#ifdef RETROGXC_C
 
static struct MDATA_VECTOR SEG_MGLOBAL gs_retrogxc_bitmaps;
 
/* === */
 
MERROR_RETVAL retrogxc_init() {
   MERROR_RETVAL retval = MERROR_OK;
 
   /*
   size_printf( RETROGXC_TRACE_LVL,
      "asset struct", sizeof( struct RETROFLAT_CACHE_ASSET ) );
   size_printf( RETROGXC_TRACE_LVL, "initial graphics cache",
      sizeof( struct RETROFLAT_CACHE_ASSET ) * gs_retrogxc_sz );
   */
 
   g_retroflat_state->retroflat_flags |= RETROFLAT_FLAGS_USE_GXC;
 
   return retval;
}
 
/* === */
 
void retrogxc_clear_cache() {
   size_t dropped_count = 0;
   struct RETROFLAT_CACHE_ASSET* asset = NULL;
   retroflat_blit_t* bitmap = NULL;
   MERROR_RETVAL retval = MERROR_OK;
 
   if( 0 == mdata_vector_ct( &gs_retrogxc_bitmaps ) ) {
      /* Nothing to do! */
      return;
   }
 
   mdata_vector_lock( &gs_retrogxc_bitmaps );
 
   while( 0 < mdata_vector_ct( &gs_retrogxc_bitmaps ) ) {
      asset = mdata_vector_get(
         &gs_retrogxc_bitmaps, 0, struct RETROFLAT_CACHE_ASSET );
      assert( NULL != asset );
 
      /* Asset-type-specific cleanup. */
      switch( asset->type ) {
      case RETROGXC_ASSET_TYPE_BITMAP:
         maug_mlock( asset->handle, bitmap );
         if( NULL != bitmap ) {
            retroflat_2d_destroy_bitmap( bitmap );
         }
         maug_munlock( asset->handle, bitmap );
         maug_mfree( asset->handle );
         dropped_count++;
 
      case RETROGXC_ASSET_TYPE_FONT:
         /* Fonts are just a blob of data after a struct, so just free it! */
         retrofont_free( &(asset->handle) );
         dropped_count++;
      }
 
      mdata_vector_unlock( &gs_retrogxc_bitmaps );
      mdata_vector_remove( &gs_retrogxc_bitmaps, 0 );
      mdata_vector_lock( &gs_retrogxc_bitmaps );
   }
   
   debug_printf( RETROGXC_TRACE_LVL,
      "graphics cache cleared (" SIZE_T_FMT " assets)", dropped_count );
 
cleanup:
 
   if( MERROR_OK == retval ) {
      mdata_vector_unlock( &gs_retrogxc_bitmaps );
   }
 
   return;
}
 
/* === */
 
void retrogxc_shutdown() {
   retrogxc_clear_cache();
   mdata_vector_free( &gs_retrogxc_bitmaps );
   g_retroflat_state->retroflat_flags &= ~RETROFLAT_FLAGS_USE_GXC;
}
 
/* === */
 
retrogxc_asset_type_t retrogxc_loader_bitmap(
   const maug_path res_p, MAUG_MHANDLE* handle_p, void* data,
   uint8_t flags
) {
   MERROR_RETVAL retval = MERROR_OK;
   retroflat_blit_t* bitmap = NULL;
 
   assert( (MAUG_MHANDLE)NULL == *handle_p );
 
   maug_malloc_test( *handle_p, 1, sizeof( retroflat_blit_t ) );
 
   maug_mlock( *handle_p, bitmap );
   maug_cleanup_if_null_alloc( retroflat_blit_t*, bitmap );
 
   /* Load requested bitmap into the cache. */
#ifdef RETROFLAT_XPM
   retval = retroflat_load_xpm( res_p, bitmap, flags );
#else
   retval = retroflat_2d_load_bitmap( res_p, bitmap, flags );
#endif /* RETROFLAT_XPM */
   maug_cleanup_if_not_ok();
 
cleanup:
 
   if( NULL != bitmap ) {
      maug_munlock( *handle_p, bitmap );
   }
 
   if( MERROR_OK == retval ) {
      return RETROGXC_ASSET_TYPE_BITMAP;
   } else {
      if( (MAUG_MHANDLE)NULL != *handle_p ) {
         maug_mfree( *handle_p );
      }
      return RETROGXC_ASSET_TYPE_NONE;
   }
}
 
/* === */
 
#ifdef RETROFONT_PRESENT
 
retrogxc_asset_type_t retrogxc_loader_font(
   const maug_path res_p, MAUG_MHANDLE* handle_p, void* data,
   uint8_t flags
) {
   MERROR_RETVAL retval = MERROR_OK;
   struct RETROGXC_FONT_PARMS* parms = (struct RETROGXC_FONT_PARMS*)data;
 
   assert( (MAUG_MHANDLE)NULL == *handle_p );
 
   debug_printf( 1, "loading font into cache: %s (%d, %d, %d)",
      res_p, parms->glyph_h, parms->first_glyph, parms->glyphs_count );
 
   retval = retrofont_load( res_p, handle_p,
      parms->glyph_h, parms->first_glyph, parms->glyphs_count );
   maug_cleanup_if_not_ok();
 
cleanup:
 
   if( MERROR_OK == retval ) {
      return RETROGXC_ASSET_TYPE_FONT;
   } else {
      return RETROGXC_ASSET_TYPE_NONE;
   }
}
 
#endif /* RETROFONT_PRESENT */
 
/* === */
 
int16_t retrogxc_load_asset(
   const maug_path res_p, retrogxc_loader l, void* data,
   uint8_t flags
) {
   int16_t idx = RETROGXC_ERROR_CACHE_MISS,
      i = 0;
   struct RETROFLAT_CACHE_ASSET asset_new;
   struct RETROFLAT_CACHE_ASSET* asset_iter = NULL;
   retrogxc_asset_type_t asset_type = RETROGXC_ASSET_TYPE_NONE;
   MERROR_RETVAL retval = MERROR_OK;
 
   maug_mzero( &asset_new, sizeof( struct RETROFLAT_CACHE_ASSET ) );
 
   if( 0 == mdata_vector_ct( &gs_retrogxc_bitmaps ) ) {
      goto just_load_asset;
   }
 
   /* Try to find the bitmap already in the cache. */
   mdata_vector_lock( &gs_retrogxc_bitmaps );
   for( i = 0 ; mdata_vector_ct( &gs_retrogxc_bitmaps ) > (size_t)i ; i++ ) {
      asset_iter = mdata_vector_get(
         &gs_retrogxc_bitmaps, i, struct RETROFLAT_CACHE_ASSET );
      assert( NULL != asset_iter );
      debug_printf( RETROGXC_TRACE_LVL, "\"%s\" vs \"%s\"",
        asset_iter->id, res_p );
      if( 0 == mfile_cmp_path( asset_iter->id, res_p ) ) {
         debug_printf( RETROGXC_TRACE_LVL,
            "found asset \"%s\" at index %d with type %d!",
            res_p, i, asset_iter->type );
         idx = i;
         mdata_vector_unlock( &gs_retrogxc_bitmaps );
         goto cleanup;
      }
   }
   mdata_vector_unlock( &gs_retrogxc_bitmaps );
 
just_load_asset:
 
   /* Bitmap not found. */
   debug_printf( RETROGXC_TRACE_LVL,
      "asset %s not found in cache; loading...", res_p );
 
   /* Call the format-specific loader. */
   asset_type = l( res_p, &asset_new.handle, data, flags );
   if( RETROGXC_ASSET_TYPE_NONE != asset_type ) {
      asset_new.type = asset_type;
      mfile_assign_path( asset_new.id, res_p, 0 );
      idx = mdata_vector_append(
         &gs_retrogxc_bitmaps, &asset_new,
         sizeof( struct RETROFLAT_CACHE_ASSET ) );
      if( 0 > idx ) {
         goto cleanup;
      }
      debug_printf( RETROGXC_TRACE_LVL,
         "asset type %d, \"%s\" assigned cache ID: %d",
         asset_type, res_p, idx );
      goto cleanup;
   }
 
   /* Still not found! */
   error_printf( "unable to load asset; cache full or not initialized?" );
 
cleanup:
 
   if( MERROR_OK != retval ) {
      idx = retval * -1;
   }
 
   return idx;
}
 
/* === */
 
MAUG_MHANDLE retrogxc_get_asset(
   size_t asset_idx, retrogxc_asset_type_t asset_type
) {
   MAUG_MHANDLE handle_out = (MAUG_MHANDLE)NULL;
   MERROR_RETVAL retval = MERROR_OK;
   struct RETROFLAT_CACHE_ASSET* asset = NULL;
 
   assert( (MAUG_MHANDLE)NULL != gs_retrogxc_bitmaps.data_h );
 
   mdata_vector_lock( &gs_retrogxc_bitmaps );
 
   if( mdata_vector_ct( &gs_retrogxc_bitmaps ) <= asset_idx ) {
      error_printf( "invalid asset index: " SIZE_T_FMT, asset_idx );
      goto cleanup;
   }
 
   asset = mdata_vector_get(
      &gs_retrogxc_bitmaps, asset_idx, struct RETROFLAT_CACHE_ASSET );
 
   if( asset_type != asset->type ) {
      error_printf(
         "index " SIZE_T_FMT
         " not present in cache or not requested type %d (%d)!",
         asset_idx, asset_type, asset->type );
      goto cleanup;
   }
 
   handle_out = asset->handle;
 
cleanup:
 
   if( MERROR_OK != retval ) {
      handle_out = NULL;
   }
 
   mdata_vector_unlock( &gs_retrogxc_bitmaps );
 
   return handle_out;
}
 
/* === */
 
MERROR_RETVAL retrogxc_blit_bitmap(
   retroflat_blit_t* target, size_t bitmap_idx,
   retroflat_pxxy_t s_x, retroflat_pxxy_t s_y,
   retroflat_pxxy_t d_x, retroflat_pxxy_t d_y,
   retroflat_pxxy_t w, retroflat_pxxy_t h, int16_t instance
) {
   MERROR_RETVAL retval = MERROR_OK;
   struct RETROFLAT_CACHE_ASSET* asset = NULL;
   retroflat_blit_t* bitmap = NULL;
 
   assert( (MAUG_MHANDLE)NULL != gs_retrogxc_bitmaps.data_h );
 
   mdata_vector_lock( &gs_retrogxc_bitmaps );
 
   if( mdata_vector_ct( &gs_retrogxc_bitmaps ) <= bitmap_idx ) {
      error_printf( "invalid bitmap index: " SIZE_T_FMT, bitmap_idx );
      retval = MERROR_OVERFLOW;
      goto cleanup;
   }
 
   asset = mdata_vector_get(
      &gs_retrogxc_bitmaps, bitmap_idx, struct RETROFLAT_CACHE_ASSET );
 
   if( RETROGXC_ASSET_TYPE_BITMAP != asset->type ) {
      error_printf(
         "index " SIZE_T_FMT " not present in cache or not bitmap (%d)!",
         bitmap_idx, asset->type );
      retval = MERROR_FILE;
      goto cleanup;
   }
 
   maug_mlock( asset->handle, bitmap );
 
   retval = retroflat_2d_blit_bitmap(
      target, bitmap, s_x, s_y, d_x, d_y, w, h, instance );
 
cleanup:
 
   if( NULL != bitmap ) {
      maug_munlock( asset->handle, bitmap );
   }
 
   mdata_vector_unlock( &gs_retrogxc_bitmaps );
 
   return retval;
}
 
/* === */
 
MERROR_RETVAL retrogxc_bitmap_wh(
   size_t bitmap_idx, retroflat_pxxy_t* p_w, retroflat_pxxy_t* p_h
) {
   MERROR_RETVAL retval = MERROR_OK;
   struct RETROFLAT_CACHE_ASSET* asset = NULL;
   retroflat_blit_t* bitmap = NULL;
 
   mdata_vector_lock( &gs_retrogxc_bitmaps );
 
   if( mdata_vector_ct( &gs_retrogxc_bitmaps ) <= bitmap_idx ) {
      error_printf( "invalid bitmap index: " SIZE_T_FMT, bitmap_idx );
      retval = MERROR_OVERFLOW;
      goto cleanup;
   }
 
   asset = mdata_vector_get(
      &gs_retrogxc_bitmaps, bitmap_idx, struct RETROFLAT_CACHE_ASSET );
 
   if( RETROGXC_ASSET_TYPE_BITMAP != asset->type ) {
      error_printf(
         "index " SIZE_T_FMT " not present in cache or not bitmap (%d)!",
         bitmap_idx, asset->type );
      retval = MERROR_FILE;
      goto cleanup;
   }
 
   maug_mlock( asset->handle, bitmap );
 
   if( NULL != p_w ) {
      *p_w = retroflat_2d_bitmap_w( bitmap );
   }
 
   if( NULL != p_h ) {
      *p_h = retroflat_2d_bitmap_h( bitmap );
   }
 
cleanup:
 
   if( NULL != bitmap ) {
      maug_munlock( asset->handle, bitmap );
   }
 
   mdata_vector_unlock( &gs_retrogxc_bitmaps );
 
   return retval;
}
 
/* === */
 
#ifdef RETROFONT_PRESENT
 
int16_t retrogxc_load_font(
   const maug_path font_name,
   uint8_t glyph_h, uint16_t first_glyph, uint16_t glyphs_count 
) {
   int16_t idx = -1;
   struct RETROGXC_FONT_PARMS parms;
 
   parms.glyph_h = glyph_h;
   parms.first_glyph = first_glyph;
   parms.glyphs_count = glyphs_count;
 
   idx = retrogxc_load_asset( font_name, retrogxc_loader_font, &parms, 0 );
 
   return idx;
}
 
#endif /* RETROFONT_PRESENT */
 
#endif /* RETROGXC_C */
 /* maug_retroflt */
 /* maug_retrogxc */
 
#endif /* !RETROGXC_H */