vg_profiler.h

   1 #ifndef VG_PROFILER_H
   2 #define VG_PROFILER_H
   3
   4 #define VG_GAME
   5 #include "vg.h"
   6 #include "vg_platform.h"
   7
   8 #define VG_PROFILE_SAMPLE_COUNT 128
   9
  10 static int vg_profiler = 0;
  11
  12 struct vg_profile
  13 {
  14    const char *name;
  15
  16    u64 samples[ VG_PROFILE_SAMPLE_COUNT ];
  17    u32 buffer_count, buffer_current;
  18
  19    enum profile_mode
  20    {
  21       k_profile_mode_frame,
  22       k_profile_mode_accum
  23    }
  24    mode;
  25
  26    u64 start;
  27 };
  28
  29 VG_STATIC void vg_profile_begin( struct vg_profile *profile )
  30 {
  31    profile->start = SDL_GetPerformanceCounter();
  32 }
  33
  34 VG_STATIC void vg_profile_increment( struct vg_profile *profile )
  35 {
  36    profile->buffer_current ++;
  37
  38    if( profile->buffer_count < VG_PROFILE_SAMPLE_COUNT )
  39       profile->buffer_count ++;
  40
  41    if( profile->buffer_current >= VG_PROFILE_SAMPLE_COUNT )
  42       profile->buffer_current = 0;
  43
  44    profile->samples[ profile->buffer_current ] = 0;
  45 }
  46
  47 VG_STATIC void vg_profile_end( struct vg_profile *profile )
  48 {
  49    u64 time_end = SDL_GetPerformanceCounter(),
  50        delta    = time_end - profile->start;
  51
  52    if( profile->mode == k_profile_mode_frame )
  53    {
  54       profile->samples[ profile->buffer_current ] = delta;
  55       vg_profile_increment( profile );
  56    }
  57    else
  58    {
  59       profile->samples[ profile->buffer_current ] += delta;
  60    }
  61 }
  62
  63 VG_STATIC void vg_profile_drawn( struct vg_profile **profiles, u32 count,
  64                               float budget, ui_rect panel, u32 colour_offset )
  65 {
  66    if( !vg_profiler )
  67       return;
  68
  69    if( panel[2] == 0 )
  70       panel[2] = 256;
  71
  72    if( panel[3] == 0 )
  73       panel[3] = VG_PROFILE_SAMPLE_COUNT * 2;
  74
  75    float sh = panel[3] / VG_PROFILE_SAMPLE_COUNT,
  76          sw = panel[2];
  77
  78    ui_fill_rect( panel, 0xa0000000 );
  79
  80    assert( count <= 8 );
  81    float avgs[8];
  82    int   ptrs[8];
  83
  84    for( int i=0; i<count; i++ )
  85    {
  86       ptrs[i] = profiles[i]->buffer_current;
  87       avgs[i] = 0.0f;
  88    }
  89
  90    u32 colours[] = { 0xff0000ff, 0xff00ff00, 0xff00ffff, 0xffff0000,
  91                      0xffff00ff, 0xffffff00 };
  92
  93    double rate_mul = 1000.0 / (double)SDL_GetPerformanceFrequency();
  94
  95    for( int i=0; i<VG_PROFILE_SAMPLE_COUNT-1; i++ )
  96    {
  97       float total = 0.0f;
  98
  99       for( int j=0; j<count; j++ )
 100       {
 101          ptrs[j] --;
 102
 103          if( ptrs[j] < 0 )
 104             ptrs[j] = VG_PROFILE_SAMPLE_COUNT-1;
 105
 106          float sample  = (double)profiles[j]->samples[ptrs[j]] * rate_mul,
 107                px      = (total  / (budget)) * sw,
 108                wx      = (sample / (budget)) * sw;
 109
 110          ui_rect block = { panel[0] + px, panel[1] + (float)i*sh,
 111                            wx,            sh };
 112
 113          u32 colour = colours[ (j+colour_offset) % vg_list_size(colours) ];
 114          ui_fill_rect( block, colour );
 115
 116          total += sample;
 117          avgs[j] += sample;
 118       }
 119    }
 120
 121    char infbuf[64];
 122
 123    for( int i=0; i<count; i++ )
 124    {
 125       snprintf( infbuf, 64, "%.4fms %s",
 126                         avgs[i] * (1.0f/(VG_PROFILE_SAMPLE_COUNT-1)),
 127                         profiles[i]->name );
 128
 129       ui_text( (ui_rect){ panel[0] + panel[2] + 4,
 130                           panel[1] + i * 14, 0, 0 },
 131                           infbuf,
 132                           1,
 133                           k_text_align_left );
 134    }
 135 }
 136
 137 VG_STATIC void vg_profiler_init(void)
 138 {
 139    vg_convar_push( (struct vg_convar){
 140       .name = "vg_profiler",
 141       .data = &vg_profiler,
 142       .data_type = k_convar_dtype_i32,
 143       .opt_i32 = { .min=0, .max=1, .clamp=1 },
 144       .persistent = 1
 145    });
 146 }
 147
 148 #endif /* VG_PROFILER_H */