2 * Copyright 2021-2022 (C) Mount0 Software, Harry Godden - All Rights Reserved
3 * -----------------------------------------------------------------------------
7 * -----------------------------------------------------------------------------
15 VG_STATIC
void vg_loader_start( void(*pfn
)(void) );
16 VG_STATIC
void vg_loader_step( void( *fn_load
)(void), void( *fn_free
)(void) );
18 static struct vg_shader _shader_loader
=
20 .name
= "[vg] loader",
26 "layout (location=0) in vec2 a_co;"
30 "gl_Position = vec4(a_co*2.0-1.0,0.0,1.0);"
40 "uniform float uTime;"
45 "float dither=fract(dot(vec2(171.0,231.0),gl_FragCoord.xy)/71.0)-0.5;"
46 "float grad = 1.0-(aUv.y*0.5+0.5)*0.5;"
47 "float fmt1 = step( 0.5, grad+dither );"
49 "vec3 col = 0.5+0.5*sin( uTime + aUv.xyx + vec3(0.0,2.0,4.0) );"
51 "FragColor = vec4(vec3(0.5,0.5,0.5)*grad*fmt1,1.0);"
56 static struct vg_loader
59 struct loader_free_step
61 void (*fn_free
)(void);
64 u32 step_count
, step_action
;
70 VG_STATIC
void _vg_loader_init(void)
72 float quad
[] = { 0.0f
, 0.0f
, 1.0f
, 1.0f
, 0.0f
, 1.0f
,
73 0.0f
, 0.0f
, 1.0f
, 0.0f
, 1.0f
, 1.0f
};
75 glGenVertexArrays( 1, &vg_loader
.vao
);
76 glGenBuffers( 1, &vg_loader
.vbo
);
77 glBindVertexArray( vg_loader
.vao
);
78 glBindBuffer( GL_ARRAY_BUFFER
, vg_loader
.vbo
);
79 glBufferData( GL_ARRAY_BUFFER
, sizeof(quad
), quad
, GL_STATIC_DRAW
);
80 glBindVertexArray( vg_loader
.vao
);
81 glVertexAttribPointer( 0, 2, GL_FLOAT
, GL_FALSE
, sizeof(float)*2, (void*)0 );
82 glEnableVertexAttribArray( 0 );
86 if( !vg_shader_compile( &_shader_loader
) )
87 vg_fatal_exit_loop( "failed to compile shader" );
90 VG_STATIC
void _vg_loader_free(void)
92 vg_info( "vg_loader_free\n" );
93 glDeleteVertexArrays( 1, &vg_loader
.vao
);
94 glDeleteBuffers( 1, &vg_loader
.vbo
);
96 for( int i
=0; i
<vg_loader
.step_count
; i
++ )
98 struct loader_free_step
*step
=
99 &vg_loader
.step_buffer
[vg_loader
.step_count
-1 -i
];
101 vg_info( " -> %p\n", step
->fn_free
);
108 VG_STATIC
void _vg_render_log(void)
110 ui_begin( vg
.window_x
, vg
.window_y
);
111 SDL_AtomicLock( &log_print_sl
);
114 int lines_screen_max
= ((vg
.window_y
/fh
)-2),
115 lines_max_draw
= VG_MIN( lines_screen_max
, vg_list_size(vg_log
.buffer
) ),
116 lines_to_draw
= VG_MIN( lines_max_draw
, vg_log
.buffer_line_count
);
118 int ptr
= vg_log
.buffer_line_current
;
120 vg_uictx
.cursor
[0] = 0;
121 vg_uictx
.cursor
[1] = lines_to_draw
*fh
;
122 vg_uictx
.cursor
[3] = fh
;
125 for( int i
=0; i
<lines_to_draw
; i
++ )
130 ptr
= vg_list_size( vg_log
.buffer
)-1;
132 ui_text( vg_uictx
.cursor
, vg_log
.buffer
[ptr
], 1, 0 );
133 vg_uictx
.cursor
[1] -= fh
;
136 SDL_AtomicUnlock( &log_print_sl
);
142 VG_STATIC
void _vg_loader_render(void)
144 glViewport( 0,0, vg
.window_x
, vg
.window_y
);
145 glBindFramebuffer( GL_FRAMEBUFFER
, 0 );
146 glClearColor( 0.0f
, 0.0f
, 0.0f
, 1.0f
);
147 glClear( GL_COLOR_BUFFER_BIT
|GL_DEPTH_BUFFER_BIT
);
149 glUseProgram( _shader_loader
.id
);
150 glUniform1f( glGetUniformLocation( _shader_loader
.id
, "uTime" ), vg
.time
);
152 glBindVertexArray( vg_loader
.vao
);
153 glDrawArrays( GL_TRIANGLES
, 0, 6 );
159 VG_STATIC
void vg_load_full(void);
161 VG_STATIC
int _vg_loader_thread(void *pfn
)
163 SDL_AtomicLock( &vg
.sl_context
);
164 vg
.thread_id_loader
= SDL_GetThreadID(NULL
);
165 VG_SYNC_LOG( "[%d] Loader thread begins\n" );
166 SDL_AtomicUnlock( &vg
.sl_context
);
168 /* Run client loader */
169 void (*call_func
)(void) = pfn
;
172 SDL_SemPost( vg
.sem_loader
);
173 vg
.thread_id_loader
= 0;
175 vg_acquire_thread_sync();
177 vg_release_thread_sync();
182 VG_STATIC
void vg_loader_start( void(*pfn
)(void) )
185 SDL_SemWait( vg
.sem_loader
);
186 SDL_CreateThread( _vg_loader_thread
, "Loader thread", pfn
);
190 * Schedule something to be ran now, freed later. Checks in with engine status
192 VG_STATIC
void vg_loader_step( void( *fn_load
)(void), void( *fn_free
)(void) )
199 struct loader_free_step step
;
200 step
.fn_free
= fn_free
;
202 if( vg_loader
.step_count
== vg_list_size(vg_loader
.step_buffer
) )
203 vg_fatal_exit_loop( "Too many free steps" );
205 vg_loader
.step_buffer
[ vg_loader
.step_count
++ ] = step
;
208 _vg_ensure_engine_running();
211 #endif /* VG_LOADER_H */