vg_profiler.h

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