aboutsummaryrefslogtreecommitdiff
path: root/modules/librender/g_frame.c
diff options
context:
space:
mode:
Diffstat (limited to 'modules/librender/g_frame.c')
-rw-r--r--modules/librender/g_frame.c323
1 files changed, 323 insertions, 0 deletions
diff --git a/modules/librender/g_frame.c b/modules/librender/g_frame.c
new file mode 100644
index 0000000..d84cd87
--- /dev/null
+++ b/modules/librender/g_frame.c
@@ -0,0 +1,323 @@
+/*
+ * Copyright © 2006-2016 SplinterGU (Fenix/Bennugd)
+ * Copyright © 2002-2006 Fenix Team (Fenix)
+ * Copyright © 1999-2002 José Luis Cebrián Pagüe (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;
+
+/* --------------------------------------------------------------------------- */
+/* Inicialización 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
+}
+
+/* --------------------------------------------------------------------------- */
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-29 21:17:11 +0000