From 54ecddad2f6c90fd11be5619267be9b722418514 Mon Sep 17 00:00:00 2001
From: Doyle Thai <dyl.thai@gmail.com>
Date: Sat, 9 Jul 2016 20:59:54 +1000
Subject: [PATCH] Add function call counting to debug infrastructure

---
 src/Debug.c                 |  5 +++++
 src/Renderer.c              |  2 ++
 src/WorldTraveller.c        |  5 +++++
 src/include/Dengine/Debug.h | 14 ++++++++++++++
 4 files changed, 26 insertions(+)

diff --git a/src/Debug.c b/src/Debug.c
index 51f8be1..7345cdd 100644
--- a/src/Debug.c
+++ b/src/Debug.c
@@ -1,4 +1,5 @@
 #include "Dengine/Debug.h"
+#include <stdlib.h>
 
 DebugState GLOBAL_debugState;
 
@@ -9,6 +10,9 @@ void debug_init()
 	GLOBAL_debugState.stringUpdateRate  = 0.15f;
 
 	GLOBAL_debugState.stringLineGap = -1;
+
+	GLOBAL_debugState.callCount =
+	    CAST(i32 *) calloc(debugcallcount_num, sizeof(i32));
 }
 
 void debug_pushString(char *formatString, void *data, char *dataType)
@@ -76,3 +80,4 @@ void debug_stringUpdateAndRender(Renderer *renderer, Font *font, f32 dt)
 
 	GLOBAL_debugState.stringPos = GLOBAL_debugState.initialStringPos;
 }
+
diff --git a/src/Renderer.c b/src/Renderer.c
index f59b322..dc50db4 100644
--- a/src/Renderer.c
+++ b/src/Renderer.c
@@ -1,6 +1,7 @@
 #include "Dengine/Platform.h"
 #include "Dengine/OpenGL.h"
 #include "Dengine/Renderer.h"
+#include "Dengine/Debug.h"
 
 #define RENDER_BOUNDING_BOX FALSE
 
@@ -140,6 +141,7 @@ void renderer_object(Renderer *renderer, v2 pos, v2 size, f32 rotate, v4 color,
 	glDrawArrays(GL_TRIANGLE_STRIP, 0, renderer->numVertexesInVbo);
 
 #ifdef DENGINE_DEBUG
+	debug_callCountIncrement(debugcallcount_drawArrays);
 #endif
 
 	glBindVertexArray(0);
diff --git a/src/WorldTraveller.c b/src/WorldTraveller.c
index c356eb6..a558ae4 100644
--- a/src/WorldTraveller.c
+++ b/src/WorldTraveller.c
@@ -423,6 +423,11 @@ void worldTraveller_gameUpdateAndRender(GameState *state, const f32 dt)
 	DEBUG_PUSH_STRING("Hero Pos: %06.2f, %06.2f", &hero->pos, "v2");
 	DEBUG_PUSH_STRING("Hero dPos: %06.2f, %06.2f", &hero->dPos, "v2");
 	DEBUG_PUSH_STRING("FreeEntityIndex: %d", &world->freeEntityIndex, "i32");
+
+	DEBUG_PUSH_STRING("glDrawArray Calls: %d",
+	                  &GLOBAL_debugState.callCount[debugcallcount_drawArrays],
+	                  "i32");
 	debug_stringUpdateAndRender(&state->renderer, font, dt);
+	debug_clearCallCounter();
 #endif
 }
diff --git a/src/include/Dengine/Debug.h b/src/include/Dengine/Debug.h
index 0f1cd00..ed4e3b8 100644
--- a/src/include/Dengine/Debug.h
+++ b/src/include/Dengine/Debug.h
@@ -15,6 +15,7 @@ enum DebugCallCount
 
 typedef struct DebugState
 {
+	i32 *callCount;
 	/* Debug strings rendered in top left corner */
 	char debugStrings[256][64];
 	i32 numDebugStrings;
@@ -29,7 +30,20 @@ typedef struct DebugState
 
 extern DebugState GLOBAL_debugState;
 
+inline void debug_callCountIncrement(i32 id)
+{
+	ASSERT(id < debugcallcount_num);
+	GLOBAL_debugState.callCount[id]++;
+}
+
+inline void debug_clearCallCounter()
+{
+	for (i32 i = 0; i < debugcallcount_num; i++)
+		GLOBAL_debugState.callCount[i] = 0;
+}
+
 void debug_init();
 void debug_pushString(char *formatString, void *data, char *dataType);
 void debug_stringUpdateAndRender(Renderer *renderer, Font *font, f32 dt);
+
 #endif