Add debug rendering, fix misaligned pos render bug

Rendering using a non-default quad specifies normalised coordinates
relative to the frame buffer size. Hence each render of these frames
should origin from (0,0) any other value is invalid.

src/include/Dengine/AssetManager.h

@@ -90,4 +90,12 @@ const i32 asset_loadShaderFiles(AssetManager *assetManager,
                                 const enum ShaderList type);
 
 const i32 asset_loadTTFont(AssetManager *assetManager, const char *filePath);
+
+inline i32 asset_getVFontSpacing(FontMetrics metrics)
+{
+	i32 result =
+	    metrics.ascent - metrics.descent + metrics.lineGap;
+	return result;
+}
+
 #endif

src/include/Dengine/Common.h

@@ -26,5 +26,6 @@ typedef double f64;
 #define CAST(type) (type)
 #define ASSERT(expr) if(!(expr)) { *(int *)0 = 0; }
 
+i32 common_strlen(const char *const string);
 
 #endif

src/include/Dengine/Renderer.h

@@ -1,9 +1,8 @@
 #ifndef DENGINE_RENDERER_H
 #define DENGINE_RENDERER_H
 
-#include "Dengine/Math.h"
 #include "Dengine/Entity.h"
-#include "Dengine/Shader.h"
+#include "Dengine/AssetManager.h"
 
 typedef struct Renderer
 {
@@ -13,15 +12,35 @@ typedef struct Renderer
 	i32 numVertexesInVbo;
 	v2 vertexNdcFactor;
 	v2 size;
-
 } Renderer;
 
+typedef struct DebugRenderer
+{
+	b32 init;
+	v2 stringPos;
+
+} DebugRenderer;
+
 typedef struct RenderQuad
 {
 	v4 vertex[4];
 } RenderQuad;
 
-void renderer_entity(Renderer *renderer, Entity *entity, f32 rotate,
+extern DebugRenderer debugRenderer;
+
+#if 0
+void renderer_backgroundTiles(Renderer *const renderer, const v2 tileSize,
+                              World *const world, TexAtlas *const atlasTexture,
+                              Texture *const tex);
+#endif
+
+void renderer_string(Renderer *const renderer, Font *const font,
+                     const char *const string, v2 pos, f32 rotate, v3 color);
+
+void renderer_debugString(Renderer *const renderer, Font *const font,
+                          const char *const string);
+
+void renderer_entity(Renderer *renderer, Entity *entity, f32 dt, f32 rotate,
                      v3 color);
 
 void renderer_object(Renderer *renderer, v2 pos, v2 size, f32 rotate, v3 color,

src/include/WorldTraveller/WorldTraveller.h

@@ -45,6 +45,7 @@ typedef struct GameState
 	AssetManager assetManager;
 } GameState;
 
+
 void worldTraveller_gameInit(GameState *state, v2i windowSize);
 void worldTraveller_gameUpdateAndRender(GameState *state, const f32 dt);
 #endif