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#include "perf.h"
#include <stdio.h>
#include <string.h>
#include <math.h>
#ifdef NANOVG_GLEW
# include <GL/glew.h>
#endif
#include <GLFW/glfw3.h>
#include "nanovg.h"
#ifdef _MSC_VER
#define snprintf _snprintf
#elif !defined(__MINGW32__)
#include <iconv.h>
#endif
// timer query support
#ifndef GL_ARB_timer_query
#define GL_TIME_ELAPSED 0x88BF
//typedef void (APIENTRY *pfnGLGETQUERYOBJECTUI64V)(GLuint id, GLenum pname, GLuint64* params);
//pfnGLGETQUERYOBJECTUI64V glGetQueryObjectui64v = 0;
#endif
void initGPUTimer(GPUtimer* timer)
{
memset(timer, 0, sizeof(*timer));
/* timer->supported = glfwExtensionSupported("GL_ARB_timer_query");
if (timer->supported) {
#ifndef GL_ARB_timer_query
glGetQueryObjectui64v = (pfnGLGETQUERYOBJECTUI64V)glfwGetProcAddress("glGetQueryObjectui64v");
printf("glGetQueryObjectui64v=%p\n", glGetQueryObjectui64v);
if (!glGetQueryObjectui64v) {
timer->supported = GL_FALSE;
return;
}
#endif
glGenQueries(GPU_QUERY_COUNT, timer->queries);
}*/
}
void startGPUTimer(GPUtimer* timer)
{
if (!timer->supported)
return;
glBeginQuery(GL_TIME_ELAPSED, timer->queries[timer->cur % GPU_QUERY_COUNT] );
timer->cur++;
}
int stopGPUTimer(GPUtimer* timer, float* times, int maxTimes)
{
NVG_NOTUSED(times);
NVG_NOTUSED(maxTimes);
GLint available = 1;
int n = 0;
if (!timer->supported)
return 0;
glEndQuery(GL_TIME_ELAPSED);
while (available && timer->ret <= timer->cur) {
// check for results if there are any
glGetQueryObjectiv(timer->queries[timer->ret % GPU_QUERY_COUNT], GL_QUERY_RESULT_AVAILABLE, &available);
if (available) {
/* GLuint64 timeElapsed = 0;
glGetQueryObjectui64v(timer->queries[timer->ret % GPU_QUERY_COUNT], GL_QUERY_RESULT, &timeElapsed);
timer->ret++;
if (n < maxTimes) {
times[n] = (float)((double)timeElapsed * 1e-9);
n++;
}*/
}
}
return n;
}
void initGraph(PerfGraph* fps, int style, const char* name)
{
memset(fps, 0, sizeof(PerfGraph));
fps->style = style;
strncpy(fps->name, name, sizeof(fps->name));
fps->name[sizeof(fps->name)-1] = '\0';
}
void updateGraph(PerfGraph* fps, float frameTime)
{
fps->head = (fps->head+1) % GRAPH_HISTORY_COUNT;
fps->values[fps->head] = frameTime;
}
float getGraphAverage(PerfGraph* fps)
{
int i;
float avg = 0;
for (i = 0; i < GRAPH_HISTORY_COUNT; i++) {
avg += fps->values[i];
}
return avg / (float)GRAPH_HISTORY_COUNT;
}
void renderGraph(NVGcontext* vg, float x, float y, PerfGraph* fps)
{
int i;
float avg, w, h;
char str[64];
avg = getGraphAverage(fps);
w = 200;
h = 35;
nvgBeginPath(vg);
nvgRect(vg, x,y, w,h);
nvgFillColor(vg, nvgRGBA(0,0,0,128));
nvgFill(vg);
nvgBeginPath(vg);
nvgMoveTo(vg, x, y+h);
if (fps->style == GRAPH_RENDER_FPS) {
for (i = 0; i < GRAPH_HISTORY_COUNT; i++) {
float v = 1.0f / (0.00001f + fps->values[(fps->head+i) % GRAPH_HISTORY_COUNT]);
float vx, vy;
if (v > 80.0f) v = 80.0f;
vx = x + ((float)i/(GRAPH_HISTORY_COUNT-1)) * w;
vy = y + h - ((v / 80.0f) * h);
nvgLineTo(vg, vx, vy);
}
} else if (fps->style == GRAPH_RENDER_PERCENT) {
for (i = 0; i < GRAPH_HISTORY_COUNT; i++) {
float v = fps->values[(fps->head+i) % GRAPH_HISTORY_COUNT] * 1.0f;
float vx, vy;
if (v > 100.0f) v = 100.0f;
vx = x + ((float)i/(GRAPH_HISTORY_COUNT-1)) * w;
vy = y + h - ((v / 100.0f) * h);
nvgLineTo(vg, vx, vy);
}
} else {
for (i = 0; i < GRAPH_HISTORY_COUNT; i++) {
float v = fps->values[(fps->head+i) % GRAPH_HISTORY_COUNT] * 1000.0f;
float vx, vy;
if (v > 20.0f) v = 20.0f;
vx = x + ((float)i/(GRAPH_HISTORY_COUNT-1)) * w;
vy = y + h - ((v / 20.0f) * h);
nvgLineTo(vg, vx, vy);
}
}
nvgLineTo(vg, x+w, y+h);
nvgFillColor(vg, nvgRGBA(255,192,0,128));
nvgFill(vg);
nvgFontFace(vg, "sans");
if (fps->name[0] != '\0') {
nvgFontSize(vg, 14.0f);
nvgTextAlign(vg, NVG_ALIGN_LEFT|NVG_ALIGN_TOP);
nvgFillColor(vg, nvgRGBA(240,240,240,192));
nvgText(vg, x+3,y+1, fps->name, NULL);
}
if (fps->style == GRAPH_RENDER_FPS) {
nvgFontSize(vg, 18.0f);
nvgTextAlign(vg,NVG_ALIGN_RIGHT|NVG_ALIGN_TOP);
nvgFillColor(vg, nvgRGBA(240,240,240,255));
sprintf(str, "%.2f FPS", 1.0f / avg);
nvgText(vg, x+w-3,y+1, str, NULL);
nvgFontSize(vg, 15.0f);
nvgTextAlign(vg,NVG_ALIGN_RIGHT|NVG_ALIGN_BOTTOM);
nvgFillColor(vg, nvgRGBA(240,240,240,160));
sprintf(str, "%.2f ms", avg * 1000.0f);
nvgText(vg, x+w-3,y+h-1, str, NULL);
}
else if (fps->style == GRAPH_RENDER_PERCENT) {
nvgFontSize(vg, 18.0f);
nvgTextAlign(vg,NVG_ALIGN_RIGHT|NVG_ALIGN_TOP);
nvgFillColor(vg, nvgRGBA(240,240,240,255));
sprintf(str, "%.1f %%", avg * 1.0f);
nvgText(vg, x+w-3,y+1, str, NULL);
} else {
nvgFontSize(vg, 18.0f);
nvgTextAlign(vg,NVG_ALIGN_RIGHT|NVG_ALIGN_TOP);
nvgFillColor(vg, nvgRGBA(240,240,240,255));
sprintf(str, "%.2f ms", avg * 1000.0f);
nvgText(vg, x+w-3,y+1, str, NULL);
}
}
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