source/profiler.cpp

   1 /* $Id$
   2
   3 This file is part of gldbg
   4 Copyright © 2010  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the GPL
   6 */
   7
   8 #include <msp/io/print.h>
   9 #include <msp/time/units.h>
  10 #include <msp/time/utils.h>
  11 #include "gldbg.h"
  12 #include "profiler.h"
  13
  14 using namespace std;
  15 using namespace Msp;
  16
  17 Profiler::Profiler(GlDbg &dbg):
  18         decoder(gldecoder_new(this, 0)),
  19         enabled(false)
  20 {
  21         dbg.get_command_interpreter().register_command("profile", this, &Profiler::cmd_profile)
  22                 .set_help("Profiles GL usage and performance",
  23                         "profile {on|off}\n"
  24                         "  Enables or disables profiling\n");
  25
  26         decoder->glDrawArrays = glDrawArrays;
  27         decoder->glDrawElements = glDrawElements;
  28         decoder->glDrawRangeElements = glDrawRangeElements;
  29         decoder->glXSwapBuffers = glXSwapBuffers;
  30 }
  31
  32 void Profiler::decode(const char *data, unsigned len)
  33 {
  34         if(enabled)
  35                 gldecoder_decode(decoder, data, len);
  36 }
  37
  38 void Profiler::cmd_profile(const string &args)
  39 {
  40         if(args.empty() || args=="on")
  41         {
  42                 enabled = true;
  43                 frames = 0;
  44                 draw_calls = 0;
  45                 vertices = 0;
  46                 triangles = 0;
  47                 start = Msp::Time::now();
  48         }
  49         else if(args=="off")
  50                 enabled = false;
  51         else
  52                 throw InvalidParameterValue("Invalid argument");
  53 }
  54
  55 void Profiler::glDrawArrays(void *user_data, GLenum mode, int, int count)
  56 {
  57         glDrawElements(user_data, mode, count, 0, 0);
  58 }
  59
  60 void Profiler::glDrawElements(void *user_data, GLenum mode, int count, GLenum, const void *)
  61 {
  62         Profiler *self = reinterpret_cast<Profiler *>(user_data);
  63
  64         ++self->draw_calls;
  65         self->vertices += count;
  66
  67         switch(mode)
  68         {
  69         case GL_TRIANGLES:
  70                 self->triangles += count/3;
  71                 break;
  72         case GL_TRIANGLE_STRIP:
  73         case GL_TRIANGLE_FAN:
  74                 if(count>2)
  75                         self->triangles += count-2;
  76                 break;
  77         case GL_QUADS:
  78                 self->triangles += count/4;
  79                 break;
  80         case GL_QUAD_STRIP:
  81                 if(count>3)
  82                         self->triangles += count/2-1;
  83                 break;
  84         }
  85 }
  86
  87 void Profiler::glDrawRangeElements(void *user_data, GLenum mode, unsigned, unsigned, int count, GLenum type, const void *data)
  88 {
  89         glDrawElements(user_data, mode, count, type, data);
  90 }
  91
  92 void Profiler::glXSwapBuffers(void *user_data, Display *, GLXDrawable)
  93 {
  94         Profiler *self = reinterpret_cast<Profiler *>(user_data);
  95
  96         IO::print("%d draw calls, %d vertices, %d triangles\n", self->draw_calls, self->vertices, self->triangles);
  97         self->draw_calls = 0;
  98         self->vertices = 0;
  99         self->triangles = 0;
 100
 101         ++self->frames;
 102         Msp::Time::TimeStamp t = Msp::Time::now();
 103         Msp::Time::TimeDelta dt = t-self->start;
 104         if(dt>Msp::Time::sec)
 105         {
 106                 Msp::IO::print("%d frames in %s seconds\n", self->frames, dt);
 107                 self->start = t;
 108                 self->frames = 0;
 109         }
 110 }