6 struct vg_loader vg_loader
;
8 static struct vg_shader _shader_loader
=
10 .name
= "[vg] loader",
12 /* This is the new foreground shader */
17 "layout (location=0) in vec2 a_co;"
21 "gl_Position = vec4(a_co*2.0-1.0,0.0,1.0);"
31 "uniform float uTime;"
32 "uniform float uRatio;"
33 "uniform float uOpacity;"
36 "float eval_zero( vec2 uv )"
38 "vec4 vsines = sin( (uTime+uv.y*80.0) * vec4(1.1,2.0234,3.73,2.444) );"
39 "float gradient = min( uv.y, 0.0 );"
40 "float offset = vsines.x*vsines.y*vsines.z*vsines.w*gradient;"
42 "vec2 vpos = uv + vec2( offset, 0.0 );"
43 "float dist = dot( vpos, vpos );"
45 "float fring = step(0.1*0.1,dist) * step(dist,0.15*0.15);"
46 "return max( 0.0, fring * 1.0+gradient*6.0 );"
51 "vec3 col = 0.5+0.5*sin( uTime + aUv.xyx + vec3(0.0,2.0,4.0) );"
53 "vec2 uvx = aUv - vec2( 0.5 );"
57 "float zero = eval_zero( uvx );"
59 "float dither=fract(dot(vec2(171.0,231.0),gl_FragCoord.xy)/71.0)-0.5;"
60 "float fmt1 = step( 0.5, zero*zero + dither )*0.8+0.2;"
62 "FragColor = vec4(vec3(fmt1),uOpacity);"
67 void vg_loader_init(void)
69 float quad
[] = { 0.0f
, 0.0f
, 1.0f
, 1.0f
, 0.0f
, 1.0f
,
70 0.0f
, 0.0f
, 1.0f
, 0.0f
, 1.0f
, 1.0f
};
72 glGenVertexArrays( 1, &vg_loader
.vao
);
73 glGenBuffers( 1, &vg_loader
.vbo
);
74 glBindVertexArray( vg_loader
.vao
);
75 glBindBuffer( GL_ARRAY_BUFFER
, vg_loader
.vbo
);
76 glBufferData( GL_ARRAY_BUFFER
, sizeof(quad
), quad
, GL_STATIC_DRAW
);
77 glBindVertexArray( vg_loader
.vao
);
78 glVertexAttribPointer( 0, 2, GL_FLOAT
, GL_FALSE
, sizeof(float)*2, (void*)0 );
79 glEnableVertexAttribArray( 0 );
83 if( !vg_shader_compile( &_shader_loader
) )
84 vg_fatal_error( "failed to compile shader" );
87 static void vg_loader_free(void)
89 vg_info( "vg_loader_free\n" );
90 glDeleteVertexArrays( 1, &vg_loader
.vao
);
91 glDeleteBuffers( 1, &vg_loader
.vbo
);
93 for( int i
=0; i
<vg_loader
.step_count
; i
++ )
95 struct loader_free_step
*step
=
96 &vg_loader
.step_buffer
[vg_loader
.step_count
-1 -i
];
98 vg_info( " -> %p\n", step
->fn_free
);
103 void vg_loader_render_ring( f32 opacity
)
106 glBlendFunc(GL_SRC_ALPHA
, GL_ONE_MINUS_SRC_ALPHA
);
107 glBlendEquation(GL_FUNC_ADD
);
111 glUseProgram( _shader_loader
.id
);
112 glUniform1f( glGetUniformLocation( _shader_loader
.id
, "uTime" ), vg
.time
);
113 f32 ratio
= (f32
)vg
.window_x
/ (f32
)vg
.window_y
;
114 glUniform1f( glGetUniformLocation( _shader_loader
.id
, "uRatio"), ratio
);
115 glUniform1f( glGetUniformLocation( _shader_loader
.id
, "uOpacity"), opacity
);
116 glBindVertexArray( vg_loader
.vao
);
117 glDrawArrays( GL_TRIANGLES
, 0, 6 );
120 void vg_loader_render(void)
122 glViewport( 0,0, vg
.window_x
, vg
.window_y
);
123 glBindFramebuffer( GL_FRAMEBUFFER
, 0 );
124 glClearColor( 0.0f
, 0.0f
, 0.0f
, 1.0f
);
125 glClear( GL_COLOR_BUFFER_BIT
|GL_DEPTH_BUFFER_BIT
);
126 vg
.loader_ring
= 1.0f
;
129 static int _vg_loader_thread( void *pfn
){
130 if( setjmp( vg
.env_loader_exit
) )
133 /* Run client loader */
134 //vg_info( "Starting client loader thread @%p\n", pfn );
135 void (*call_func
)(void *data
) = pfn
;
136 call_func( vg
.thread_data
);
138 SDL_SemPost( vg
.sem_loader
);
139 vg
.thread_id_loader
= 0;
144 int vg_loader_availible(void)
146 if( SDL_SemValue( vg
.sem_loader
) ){
147 if( !(vg_async
.start
) )
154 void vg_loader_start( void(*pfn
)(void *data
), void *data
)
156 SDL_SemWait( vg
.sem_loader
);
158 vg
.thread_data
= data
;
159 SDL_CreateThread( _vg_loader_thread
, "vg: loader", pfn
);
163 * Schedule something to be ran now, freed later. Checks in with engine status
165 void _vg_loader_step( void( *fn_load
)(void), void( *fn_free
)(void),
168 u64 t0
= SDL_GetPerformanceCounter();
169 vg
.time_hp_last
= vg
.time_hp
;
174 u64 udt
= SDL_GetPerformanceCounter() - t0
;
175 double dt
= (double)udt
/ (double)SDL_GetPerformanceFrequency();
176 vg_info( "ltime [%p] %s: %fs\n", fn_load
, alias
, dt
);
179 struct loader_free_step step
;
180 step
.fn_free
= fn_free
;
182 if( vg_loader
.step_count
== vg_list_size(vg_loader
.step_buffer
) )
183 vg_fatal_error( "Too many free steps" );
185 vg_loader
.step_buffer
[ vg_loader
.step_count
++ ] = step
;
188 /* TODO: There was a quit checker here, re-add this? */