X-Git-Url: https://harrygodden.com/git/?p=vg.git;a=blobdiff_plain;f=vg_engine.h;fp=vg_engine.h;h=81bbda52ddde891d7d3558fc0b9043c1eb61f0a1;hp=0000000000000000000000000000000000000000;hb=3b14f3dcd5bf9dd3c85144f2123d667bfa4bb63f;hpb=fce86711735b15bff37de0f70716808410fcf269

diff --git a/vg_engine.h b/vg_engine.h
new file mode 100644
index 0000000..81bbda5
--- /dev/null
+++ b/vg_engine.h
@@ -0,0 +1,241 @@
+#pragma once
+
+/* Copyright (C) 2021-2024 Mt.Zero Software - All Rights Reserved */
+/*
+ .-.                           VG Event loop
+| 0 |
+|   |  .---------------------------------------------------------.
+|API| | vg_enter( int argc, char *argv[], const char *window_name |
+|   |  '---------------------------------------------------------'
+|   |        |
+|   |        v
+|IMP|  vg_launch_opt(void) <--.
+|   |        |                 |
+|   |        |'---------------'
+|   |        |                                     .-.
+|   |        |'-----------------------------------| 1 |------.
+|   |        |                                    |   |       |
+|   |        |                                    |   |       v
+|   |        |                                    |IMP|  vg_preload(void)
+|   |        |                                    |   |       |
+|   |  .-----+.                                   |   |       v
+|   | |        |                                  |IMP|  vg_load(void)
+|   | |        v                                  '___'       |
+|IMP| |   vg_framebuffer_resize(void)                         |
+|   | |        |                                              |
+|IMP| |        |.--------------------------------------------'
+|   | |        |
+|   | |        v
+|IMP| |   vg_pre_update(void)
+|   | |        |                                     
+|   | |  .-----+. 
+|   | | |        |   called 0x to 8x
+|   | | |        v
+|IMP| |  '- vg_fixed_update(void)
+|   | |          |
+|   | |       .-'
+|   | |      |
+|   | |      v
+|IMP| |   vg_post_update(void)
+|   | |      |
+|   | |      v
+|IMP| |   vg_render(void)
+|   | |      |
+|   | |      v
+|IMP| |   vg_gui(void)
+|   | |      |
+|   | |      v
+|IMP| |   vg_game_settings_init(void)
+|IMP| |   vg_game_settings_gui( ui_rect panel ) 
+|   | |      |     (optional: #define VG_GAME_SETTINGS)
+|   | |      |
+|   |  '----'
+'___'
+
+*/
+
+/* configuration warnings */
+
+#ifndef VG_TIMESTEP_FIXED
+ #warning VG_TIMESTEP_FIXED not defined; setting to 1/60
+ #define VG_TIMESTEP_FIXED (1.0/60.0)
+#endif
+
+#ifndef VG_3D
+ #ifndef VG_2D
+  #warning VG_3D or VG_2D not defined; defining VG_3D
+  #define VG_3D
+ #endif
+#endif
+
+#define VG_ENGINE
+#define SDL_MAIN_HANDLED
+
+#include "dep/glad/glad.h"
+#include "dep/sdl/include/SDL.h"
+
+#include "vg_platform.h"
+#include "vg_mem.h"
+#include "vg_m.h"
+#include "vg_imgui.h"
+
+#include <setjmp.h>
+
+/* API */
+void vg_enter( int argc, char *argv[], const char *window_name );
+
+/* Thread 1 */
+void vg_bake_shaders(void);
+
+extern void vg_preload(void);
+extern void vg_load(void);
+
+/* Main thread */
+extern void vg_launch_opt(void);
+extern void vg_framebuffer_resize(int w, int h);
+extern void vg_pre_update(void);
+extern void vg_fixed_update(void);
+extern void vg_post_update(void);
+
+extern void vg_render(void);
+extern void vg_gui(void);
+
+void vg_settings_open(void);
+void vg_settings_close(void);
+
+enum quality_profile{
+   k_quality_profile_high = 0,
+   k_quality_profile_low = 1,
+   k_quality_profile_min = 2
+};
+
+enum vg_thread_purpose
+{
+   k_thread_purpose_nothing,
+   k_thread_purpose_main,
+   k_thread_purpose_loader
+};
+
+struct vg_engine {
+   /* Engine sync */
+   SDL_Window     *window;
+   SDL_GLContext  gl_context;
+
+   SDL_sem *sem_loader;        /* allows only one loader at a time */
+   jmp_buf env_loader_exit;
+
+   SDL_threadID  thread_id_main,
+                 thread_id_loader;
+   void         *thread_data;
+
+   SDL_SpinLock sl_status;
+   enum engine_status{
+      k_engine_status_none,
+      k_engine_status_load_internal,
+      k_engine_status_running,
+      k_engine_status_crashed
+   }
+   engine_status;
+
+   /* Window information */
+   int window_x,
+       window_y,
+       samples,
+       window_should_close;
+   const char     *base_path;
+
+   int display_refresh_rate,
+       fps_limit,
+       vsync,
+       screen_mode,
+       display_index;
+
+   int settings_open;
+
+   enum vsync_feature{
+      k_vsync_feature_disabled=0,
+      k_vsync_feature_enabled=1,
+      k_vsync_feature_enabled_adaptive=2,
+      k_vsync_feature_error=3
+   }
+   vsync_feature;
+
+   i32 mouse_pos[2];
+   v2f mouse_delta,
+       mouse_wheel;
+
+   /* Runtime */
+   double time,
+          time_real,
+          time_delta,
+          time_rate,
+
+          time_fixed_accumulator,
+          time_fixed_extrapolate,
+          time_frame_delta;
+
+   f32 time_fixed_delta;
+
+   u64 time_hp, time_hp_last, time_spinning;
+
+   int fixed_iterations;
+
+   enum engine_stage{
+      k_engine_stage_none,
+      k_engine_stage_update,
+      k_engine_stage_update_fixed,
+      k_engine_stage_rendering,
+      k_engine_stage_ui
+   }
+   engine_stage;
+
+   /* graphics */
+#ifdef VG_3D
+   m4x4f pv;
+#else
+   m3x3f pv;
+#endif
+
+   i32 quality_profile;
+
+   float loader_ring;
+   GLuint tex_missing;
+
+   vg_rand rand;
+}
+extern vg;
+
+struct vg_setting_enum
+{
+   i32 new_value, *actual_value;
+
+   struct ui_enum_opt *options;
+   u32 option_count;
+   const char *label;
+};
+
+struct vg_setting_ranged_i32
+{
+   i32 new_value, *actual_value, min, max;
+   char buf[10];
+   const char *label;
+};
+
+void ui_settings_ranged_i32_init( struct vg_setting_ranged_i32 *prop );
+void ui_settings_enum_init( struct vg_setting_enum *prop );
+bool vg_settings_enum( struct vg_setting_enum *prop, ui_rect rect );
+bool vg_settings_enum_diff( struct vg_setting_enum *prop );
+void vg_settings_ui_header( ui_rect inout_panel, const char *name );
+bool vg_settings_apply_button( ui_rect inout_panel, bool validated );
+
+enum engine_status _vg_engine_status(void);
+enum vg_thread_purpose vg_thread_purpose(void);
+
+void vg_checkgl( const char *src_info );
+#define VG_STRINGIT( X ) #X
+#define VG_CHECK_GL_ERR() vg_checkgl( __FILE__ ":L" VG_STRINGIT(__LINE__) )
+
+/* the few includes we always want. */
+#include "vg_log.h"
+#include "vg_shader.h"
+#include "vg_console.h"