2 * Copyright 2021-2022 (C) Mount0 Software, Harry Godden - All Rights Reserved
3 * -----------------------------------------------------------------------------
7 * -----------------------------------------------------------------------------
15 static struct vg_shader _shader_loader
=
17 .name
= "[vg] loader",
23 "layout (location=0) in vec2 a_co;"
27 "gl_Position = vec4(a_co*2.0-1.0,0.0,1.0);"
37 "uniform float uTime;"
42 "float dither=fract(dot(vec2(171.0,231.0),gl_FragCoord.xy)/71.0)-0.5;"
43 "float grad = 1.0-(aUv.y*0.5+0.5);"
44 "float fmt1 = step( 0.5, grad+dither );"
46 "vec3 col = 0.5+0.5*sin( uTime + aUv.xyx + vec3(0.0,2.0,4.0) );"
48 "FragColor = vec4(col*grad*fmt1,1.0);"
53 static struct vg_loader
56 struct loader_free_step
58 void (*fn_free
)(void *);
62 u32 step_count
, step_cap
, step_action
;
68 static int vg_loader_init(void)
70 float quad
[] = { 0.0f
, 0.0f
, 1.0f
, 1.0f
, 0.0f
, 1.0f
,
71 0.0f
, 0.0f
, 1.0f
, 0.0f
, 1.0f
, 1.0f
};
73 glGenVertexArrays( 1, &vg_loader
.vao
);
74 glGenBuffers( 1, &vg_loader
.vbo
);
75 glBindVertexArray( vg_loader
.vao
);
76 glBindBuffer( GL_ARRAY_BUFFER
, vg_loader
.vbo
);
77 glBufferData( GL_ARRAY_BUFFER
, sizeof(quad
), quad
, GL_STATIC_DRAW
);
78 glBindVertexArray( vg_loader
.vao
);
79 glVertexAttribPointer( 0, 2, GL_FLOAT
, GL_FALSE
,
80 sizeof(float)*2, (void*)0 );
81 glEnableVertexAttribArray( 0 );
85 if( !vg_shader_compile( &_shader_loader
) )
87 glDeleteVertexArrays( 1, &vg_loader
.vao
);
88 glDeleteBuffers( 1, &vg_loader
.vbo
);
95 static void vg_loader_free(void)
97 vg_info( "vg_loader_free\n" );
98 glDeleteVertexArrays( 1, &vg_loader
.vao
);
99 glDeleteBuffers( 1, &vg_loader
.vbo
);
101 for( int i
=0; i
<vg_loader
.step_count
; i
++ )
103 struct loader_free_step
*step
=
104 &vg_loader
.step_buffer
[vg_loader
.step_count
-1 -i
];
106 vg_info( " -> %p\n", step
->fn_free
);
107 step
->fn_free( step
->data
);
110 vg_free( vg_loader
.step_buffer
);
114 static float hue_to_rgb( float p
, float q
, float t
)
116 if(t
< 0.0f
) t
+= 1.0f
;
117 if(t
> 1.0f
) t
-= 1.0f
;
118 if(t
< 1.0f
/6.0f
) return p
+ (q
- p
) * 6.0f
* t
;
119 if(t
< 1.0f
/2.0f
) return q
;
120 if(t
< 2.0f
/3.0f
) return p
+ (q
- p
) * (2.0f
/3.0f
- t
) * 6.0f
;
124 static void vg_render_log(void)
126 ui_begin( &ui_global_ctx
, vg_window_x
, vg_window_y
);
130 int lines_screen_max
= ((vg_window_y
/fh
)-2),
131 lines_max_draw
= VG_MIN( lines_screen_max
, vg_list_size(vg_log
.buffer
) ),
132 lines_to_draw
= VG_MIN( lines_max_draw
, vg_log
.buffer_line_count
);
134 int ptr
= vg_log
.buffer_line_current
;
136 ui_global_ctx
.cursor
[0] = 0;
137 ui_global_ctx
.cursor
[1] = lines_to_draw
*fh
;
138 ui_global_ctx
.cursor
[3] = fh
;
139 ui_fill_x( &ui_global_ctx
);
141 for( int i
=0; i
<lines_to_draw
; i
++ )
146 ptr
= vg_list_size( vg_log
.buffer
)-1;
148 ui_text( &ui_global_ctx
, ui_global_ctx
.cursor
,
149 vg_log
.buffer
[ptr
], vg_console
.scale
, 0 );
151 ui_global_ctx
.cursor
[1] -= fh
*vg_console
.scale
;
154 ui_resolve( &ui_global_ctx
);
155 ui_draw( &ui_global_ctx
, NULL
);
158 static void vg_loader_render(void)
160 glViewport( 0,0, vg_window_x
, vg_window_y
);
161 glBindFramebuffer( GL_FRAMEBUFFER
, 0 );
162 glClearColor( 0.0f
, 0.0f
, 0.0f
, 1.0f
);
163 glClear( GL_COLOR_BUFFER_BIT
|GL_DEPTH_BUFFER_BIT
);
165 glUseProgram( _shader_loader
.id
);
166 glUniform1f( glGetUniformLocation( _shader_loader
.id
, "uTime" ), vg_time
);
168 glBindVertexArray( vg_loader
.vao
);
169 glDrawArrays( GL_TRIANGLES
, 0, 6 );
175 static void vg_load_full(void);
177 static void vg_loader_thread(void * nothing
)
179 vg_thread_info
.gl_context_level
= 0;
180 vg_thread_info
.purpose
= k_thread_purpose_loader
;
181 vg_set_thread_name( "[vg] Loader" );
183 /* Run client loader */
185 vg_semaphore_post( &vg
.sem_loader
);
188 static void vg_loader_start(void)
190 vg_semaphore_wait( &vg
.sem_loader
);
191 vg_thread_run( vg_loader_thread
, NULL
);
194 static void vg_free_libc_malloced( void *data
)
199 static void vg_loader_push_free_step( struct loader_free_step step
)
201 vg_loader
.step_buffer
=
202 buffer_reserve( vg_loader
.step_buffer
, vg_loader
.step_count
,
203 &vg_loader
.step_cap
, 1,
204 sizeof( struct loader_free_step
) );
206 vg_loader
.step_buffer
[ vg_loader
.step_count
++ ] = step
;
210 * Schedule something to be ran now, freed later
212 static void vg_loader_highwater( void( *fn_load
)(void),
213 void( *fn_free
)(void *), void *data
)
220 struct loader_free_step step
;
222 step
.fn_free
= fn_free
;
224 vg_loader_push_free_step( step
);
230 struct loader_free_step step
;
232 step
.fn_free
= vg_free_libc_malloced
;
234 vg_loader_push_free_step( step
);
238 vg_ensure_engine_running();
241 #endif /* VG_LOADER_H */