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/*
* Copyright � 2006-2016 SplinterGU (Fenix/Bennugd)
* Copyright � 2002-2006 Fenix Team (Fenix)
* Copyright � 1999-2002 Jos� Luis Cebri�n Pag�e (Fenix)
*
* This file is part of Bennu - Game Development
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
*
* 3. This notice may not be removed or altered from any source
* distribution.
*
*/
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "librender.h"
/* --------------------------------------------------------------------------- */
#define FPS_INTIAL_VALUE 25
#define FPS_INTIAL_SKIP 2
/* --------------------------------------------------------------------------- */
int fps_value = FPS_INTIAL_VALUE ;
int max_jump = FPS_INTIAL_SKIP ;
float frame_ms = 1000.0 / FPS_INTIAL_VALUE ; /* 40.0 ; */
uint32_t frame_count = 0 ;
int last_frame_ticks = 0 ;
int jump = 0 ;
int FPS_count = 0 ;
int FPS_init = 0 ;
int FPS_count_sync = 0 ;
int FPS_init_sync = 0 ;
float ticks_per_frame = 0;
float fps_partial = 0;
/* --------------------------------------------------------------------------- */
/* Inicializaci�n y controles de tiempo */
/* --------------------------------------------------------------------------- */
/*
* FUNCTION : gr_set_fps
*
* Change the game fps and frameskip values
*
* PARAMS :
* fps New number of frames per second
* jump New value of maximum frameskip
*
* RETURN VALUE :
* None
*/
void gr_set_fps( int fps, int skip )
{
if ( fps == fps_value && skip == max_jump ) return ;
frame_ms = fps ? 1000.0 / ( float ) fps : 0.0 ;
max_jump = skip ;
fps_value = ( int ) fps;
FPS_init_sync = FPS_init = 0 ;
FPS_count_sync = FPS_count = 0 ;
jump = 0;
}
/* --------------------------------------------------------------------------- */
/*
* FUNCTION : gr_wait_frame
*
* Wait for the next frame start.
*
* PARAMS :
* None
*
* RETURN VALUE :
* None
*/
void gr_wait_frame()
{
int frame_ticks ;
frame_count++ ;
/* -------------- */
/* Tomo Tick actual */
#if defined(TARGET_GP2X_WIZ) || defined(TARGET_CAANOO)
frame_ticks = bgdrtm_ptimer_get_ticks_us() / 1000L;
#else
frame_ticks = SDL_GetTicks() ;
#endif
if ( !FPS_init_sync )
{
#if defined(TARGET_GP2X_WIZ) || defined(TARGET_CAANOO)
FPS_init_sync = FPS_init = bgdrtm_ptimer_get_ticks_us() / 1000L;
#else
FPS_init_sync = FPS_init = SDL_GetTicks() ;
#endif
FPS_count_sync = FPS_count = 0 ;
jump = 0;
/* Tiempo inicial del nuevo frame */
last_frame_ticks = frame_ticks ;
return;
}
/* Tiempo transcurrido total del ejecucion del ultimo frame (Frame time en ms) */
* ( float * ) &GLODWORD( librender, FRAME_TIME ) = ( frame_ticks - last_frame_ticks ) / 1000.0f ;
/* -------------- */
FPS_count++ ;
/* -------------- */
if ( fps_value )
{
FPS_count_sync++ ;
ticks_per_frame = ( ( float ) ( frame_ticks - FPS_init_sync ) ) / ( float ) FPS_count_sync ;
fps_partial = 1000.0 / ticks_per_frame ;
if ( fps_partial == fps_value )
{
FPS_init_sync = frame_ticks ;
FPS_count_sync = 0 ;
jump = 0;
}
else if ( fps_partial > fps_value )
{
int delay = FPS_count_sync * frame_ms - ( frame_ticks - FPS_init_sync ) ;
if ( delay > 0 )
{
#if defined(TARGET_GP2X_WIZ) || defined(TARGET_CAANOO)
{
unsigned long ta = bgdrtm_ptimer_get_ticks_us(), te = ta + delay * 1000;
if ( ta > te ) while ( bgdrtm_ptimer_get_ticks_us() > te );
while ( bgdrtm_ptimer_get_ticks_us() < te );
}
#else
SDL_Delay( delay );
#endif
/* Reajust after delay */
#if defined(TARGET_GP2X_WIZ) || defined(TARGET_CAANOO)
frame_ticks = bgdrtm_ptimer_get_ticks_us() / 1000L;
#else
frame_ticks = SDL_GetTicks() ;
#endif
ticks_per_frame = ( ( float ) ( frame_ticks - FPS_init_sync ) ) / ( float ) FPS_count_sync ;
fps_partial = 1000.0 / ticks_per_frame ;
}
jump = 0 ;
}
else
{
if ( jump < max_jump ) /* Como no me alcanza el tiempo, voy a hacer skip */
jump++ ; /* No dibujar el frame */
else
{
FPS_init_sync = frame_ticks ;
FPS_count_sync = 0 ;
jump = 0 ;
}
}
}
/* Si paso 1 segundo o mas desde la ultima lectura */
if ( frame_ticks - FPS_init >= 1000 )
{
if ( fps_value )
{
GLODWORD( librender, SPEED_GAUGE ) = FPS_count /*fps_partial*/ * 100.0 / fps_value ;
}
else
{
GLODWORD( librender, SPEED_GAUGE ) = 100 ;
}
GLODWORD( librender, FPS ) = FPS_count ;
FPS_init = frame_ticks ;
FPS_count = 0 ;
}
/* Tiempo inicial del nuevo frame */
last_frame_ticks = frame_ticks ;
}
/* --------------------------------------------------------------------------- */
static SDL_Color palette[256];
void gr_refresh_palette()
{
int n ;
if ( sys_pixel_format->depth > 8 )
{
if ( sys_pixel_format->palette )
{
for ( n = 0 ; n < 256 ; n++ )
{
sys_pixel_format->palette->colorequiv[ n ] = _rgb(
sys_pixel_format,
sys_pixel_format->palette->rgb[ n ].r,
sys_pixel_format->palette->rgb[ n ].g,
sys_pixel_format->palette->rgb[ n ].b
) ;
}
}
}
else if ( sys_pixel_format->depth == 8 )
{
if ( sys_pixel_format->palette )
{
for ( n = 0 ; n < 256 ; n++ )
{
palette[ n ].r = sys_pixel_format->palette->rgb[ n ].r;
palette[ n ].g = sys_pixel_format->palette->rgb[ n ].g;
palette[ n ].b = sys_pixel_format->palette->rgb[ n ].b;
}
}
else
{
uint8_t * pal = default_palette;
for ( n = 0 ; n < 256 ; n++ )
{
palette[ n ].r = *pal++;
palette[ n ].g = *pal++;
palette[ n ].b = *pal++;
}
}
if ( scale_screen )
SDL_SetColors( scale_screen, palette, 0, 256 ) ;
else
SDL_SetColors( screen, palette, 0, 256 ) ;
}
palette_changed = 0;
trans_table_updated = 0 ;
}
/* --------------------------------------------------------------------------- */
void gr_draw_frame()
{
if ( jump ) return ;
/* Actualiza paleta */
if ( palette_changed ) gr_refresh_palette();
if ( !trans_table_updated ) gr_make_trans_table();
/* Bloquea el bitmap de pantalla */
if ( gr_lock_screen() < 0 ) return ;
/* Dibuja la pantalla */
gr_draw_screen( scrbitmap, GLODWORD( librender, RESTORETYPE ), GLODWORD( librender, DUMPTYPE ) );
/* Fading */
if ( fade_on || fade_set )
{
gr_fade_step() ;
if ( background ) background->modified = 1 ;
}
/* Actualiza la paleta y la pantalla */
gr_unlock_screen() ;
}
/* --------------------------------------------------------------------------- */
void __bgdexport( librender, module_initialize )()
{
#ifndef TARGET_DINGUX_A320
if ( !SDL_WasInit( SDL_INIT_TIMER ) ) SDL_InitSubSystem( SDL_INIT_TIMER );
#endif
}
/* --------------------------------------------------------------------------- */
void __bgdexport( librender, module_finalize )()
{
#ifndef TARGET_DINGUX_A320
if ( SDL_WasInit( SDL_INIT_TIMER ) ) SDL_QuitSubSystem( SDL_INIT_TIMER );
#endif
}
/* --------------------------------------------------------------------------- */
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