perfmeter.c

/*
Copyright (c) 2005 Holger Waechtler
Copyright (c) 2005 Jeremy Fitzhardinge
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
3. The names of the authors may not be used to endorse or promote products
   derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/* Performance meter code taken from jsgf's PSPGL. */
#define GL_GLEXT_PROTOTYPES

#include <sys/time.h>
#include <GL/gl.h>

#include "perfmeter.h"

/* enable GLerror logging to "ms0:/log.txt" */
#if 0
extern void __pspgl_log (const char *fmt, ...);

	#define EGLCHK(x)							\
	do {									\
		EGLint errcode;							\
		psp_log("%d: %s\n", __LINE__, # x );				\
		x;								\
		errcode = eglGetError();					\
		if (errcode != EGL_SUCCESS) {					\
			__pspgl_log("%s (%d): EGL error 0x%04x\n",			\
				__FUNCTION__, __LINE__, (unsigned int) errcode);\
		}								\
	} while (0)

	#define GLCHK(x)							\
	do {									\
		GLint errcode;							\
		psp_log(#x "\n");							\
		x;								\
		errcode = glGetError();						\
		if (errcode != GL_NO_ERROR) {					\
			__pspgl_log("%s (%d): GL error 0x%04x\n",			\
				__FUNCTION__, __LINE__, (unsigned int) errcode);\
		}								\
	} while (0)
#else
	#define GLCHK(x) x
	#define EGLCHK(x) x
#endif

#if !GL_PSP_statistics
static unsigned long long start, end, prev;

static long long now(void)
{
	struct timeval t;

	gettimeofday(&t, NULL);

	return t.tv_sec * 1000000ll + t.tv_usec;
}
#endif

static void showstats(float drawtime, float frametime, float queuewait)
{
	GLCHK(glPushAttrib(GL_ENABLE_BIT |
			   GL_COLOR_BUFFER_BIT |
			   GL_CURRENT_BIT |
			   GL_TRANSFORM_BIT));

	GLCHK(glMatrixMode(GL_MODELVIEW));
	GLCHK(glPushMatrix());
	GLCHK(glLoadIdentity());

	GLCHK(glMatrixMode(GL_PROJECTION));
	GLCHK(glPushMatrix());
	GLCHK(glLoadIdentity());
	GLCHK(glOrtho(0, 1, 0, 10, -1, 1));

#if GL_PSP_view_matrix
	GLCHK(glMatrixMode(GL_VIEW_PSP));
	GLCHK(glPushMatrix());
	GLCHK(glLoadIdentity());
#endif

	GLCHK(glDisable(GL_DEPTH_TEST));
	GLCHK(glDisable(GL_LIGHTING));
	GLCHK(glDisable(GL_CULL_FACE));
	GLCHK(glDisable(GL_TEXTURE_2D));
	GLCHK(glEnable(GL_BLEND));
	GLCHK(glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA));
#if GL_PSP_vertex_blend
	GLCHK(glDisable(GL_VERTEX_BLEND_PSP));
#endif

	/* draw graph background */
	glColor4f(.25,.25,.25,.5);
	glBegin(GL_TRIANGLE_FAN);
	glVertex2f(0,0);
	glVertex2f(1,0);
	glVertex2f(1,1);
	glVertex2f(0,1);
	glEnd();

	/* scale so that full scale = 1/10th sec */
	GLCHK(glMatrixMode(GL_MODELVIEW));
	GLCHK(glScalef(10, 1, 1));

	GLCHK(glShadeModel(GL_FLAT));

	GLCHK(glColor4f(.5,.5,.5,.5));

	glBegin(GL_TRIANGLE_STRIP);
	  glVertex2f(0,0);
	  glVertex2f(0,.75);
	  glVertex2f(drawtime,0);
	  glVertex2f(drawtime,.75);

	  glColor4f(.8,.2,0,.5);
	  glVertex2f(frametime,0);
	  glVertex2f(frametime,.75);
	GLCHK(glEnd());

	if (queuewait) {
		glColor4f(0,1,1,.5);
		glBegin(GL_TRIANGLES);
		  glVertex2f(queuewait-.0005, 1);
		  glVertex2f(queuewait, .75);
		  glVertex2f(queuewait+.0005, 1);
		glEnd();
	}

	GLCHK(glPushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT));

	GLCHK(glEnableClientState(GL_VERTEX_ARRAY));
	GLCHK(glDisableClientState(GL_NORMAL_ARRAY));
	GLCHK(glDisableClientState(GL_TEXTURE_COORD_ARRAY));
	GLCHK(glDisableClientState(GL_COLOR_ARRAY));
#if GL_PSP_vertex_blend
	GLCHK(glDisableClientState(GL_WEIGHT_ARRAY_PSP));
#endif

	static GLuint bufferid = 0;
#define NTICKS	100
	if (bufferid == 0) {
		int i;
		struct vertex {
			float x,y,z;
		} ticks[NTICKS * 2];

		GLCHK(glGenBuffersARB(1, &bufferid));

		for(i = 0; i < NTICKS; i++) {
			ticks[i*2+0].x = i / 1000.f;
			ticks[i*2+0].y = 0.f;
			ticks[i*2+0].z = 0.f;
			ticks[i*2+1].x = i / 1000.f;
			ticks[i*2+1].y = i % 10 ? ((i % 5) ? .25 : .5) : .75;
			ticks[i*2+1].z = 0.f;
		}

		GLCHK(glBindBufferARB(GL_ARRAY_BUFFER_ARB, bufferid));
		GLCHK(glBufferDataARB(GL_ARRAY_BUFFER_ARB, 
				      sizeof(ticks), ticks,
				      GL_STATIC_DRAW_ARB));
	} else
		GLCHK(glBindBufferARB(GL_ARRAY_BUFFER_ARB, bufferid));
	
	GLCHK(glVertexPointer(3, GL_FLOAT, 0, NULL+0));
	GLCHK(glColor4f(.5,.5,0,.5));
	GLCHK(glDrawArrays(GL_LINES, 0, NTICKS*2));

	GLCHK(glPopClientAttrib());

	glBegin(GL_LINES);
		glColor3f(0,1,0);
		glVertex2f(1./60, 0);
		glVertex2f(1./60, 1);

		glColor3f(1,1,0);
		glVertex2f(1./30, 0);
		glVertex2f(1./30, 1);

		glColor3f(1,0,0);
		glVertex2f(1./15, 0);
		glVertex2f(1./15, 1);
	GLCHK(glEnd());

	GLCHK(glPopAttrib());
	
#if GL_PSP_view_matrix
	GLCHK(glMatrixMode(GL_VIEW_PSP));
	GLCHK(glPopMatrix());
#endif

	GLCHK(glMatrixMode(GL_PROJECTION));
	GLCHK(glPopMatrix());

	GLCHK(glMatrixMode(GL_MODELVIEW));
	GLCHK(glPopMatrix());
}


void pm_framestart()
{
#if GL_PSP_statistics
	GLCHK(glEnableStatsPSP(GL_STATS_TIMING_PSP));
#else
	start = now();
#endif
}

void pm_frameend()
{
	float drawtime;
	float frametime;
	float queuewait;

	glFinish();

#if GL_PSP_statistics
	{
		GLuint t;

		glGetStatisticsuivPSP(GL_STATS_APPTIME_PSP, &t);
		drawtime = t;
		glGetStatisticsuivPSP(GL_STATS_FRAMETIME_PSP, &t);
		frametime = t;
		glGetStatisticsuivPSP(GL_STATS_QUEUEWAITTIME_PSP, &t);
		queuewait = t;

		glResetStatsPSP(GL_STATS_QUEUEWAITTIME_PSP);
	}
#else
	end = now();
	drawtime = (end - start);
	frametime = (end - prev);
	queuewait = 0;
#endif

	drawtime /= 1000000.;
	frametime /= 1000000.;
	queuewait /= 1000000.;

	showstats(drawtime, frametime, queuewait);

#if !GL_PSP_statistics
	prev = now();
#endif
}