diff --git a/include/NEPolygon.h b/include/NEPolygon.h
index 4c80e58..cacd1c4 100644
--- a/include/NEPolygon.h
+++ b/include/NEPolygon.h
@@ -101,24 +101,34 @@ void NE_ShininessTableGenerate(NE_ShininessFunction function);
 /// Begins a polygon.
 ///
 /// @param mode Type of polygon to draw (GL_TRIANGLE, GL_QUAD...).
-void NE_PolyBegin(int mode);
+static inline void NE_PolyBegin(int mode)
+{
+    GFX_BEGIN = mode;
+}
 
 /// Stops drawing polygons.
-///
-/// This function seems to not be needed for anything.
-void NE_PolyEnd(void);
+static inline void NE_PolyEnd(void)
+{
+    GFX_END = 0;
+}
 
 /// Sets the color for the following vertices.
 ///
 /// @param color Color.
-void NE_PolyColor(u32 color);
+static inline void NE_PolyColor(u32 color)
+{
+    GFX_COLOR = color;
+}
 
 /// Set the normal vector for next group of vertices.
 ///
 /// @param x (x, y, z) Unit vector (v10).
 /// @param y (x, y, z) Unit vector (v10).
 /// @param z (x, y, z) Unit vector (v10).
-void NE_PolyNormalI(int x, int y, int z);
+static inline void NE_PolyNormalI(int x, int y, int z)
+{
+    GFX_NORMAL = NORMAL_PACK(x, y, z);
+}
 
 /// Set the normal vector for next group of vertices.
 ///
@@ -133,7 +143,11 @@ void NE_PolyNormalI(int x, int y, int z);
 /// @param x (x, y, z) Vertex coordinates (v16).
 /// @param y (x, y, z) Vertex coordinates (v16).
 /// @param z (x, y, z) Vertex coordinates (v16).
-void NE_PolyVertexI(int x, int y, int z);
+static inline void NE_PolyVertexI(int x, int y, int z)
+{
+    GFX_VERTEX16 = (y << 16) | (x & 0xFFFF);
+    GFX_VERTEX16 = (uint32_t)(uint16_t)z;
+}
 
 /// Send vertex to the GPU.
 ///
@@ -152,7 +166,10 @@ void NE_PolyVertexI(int x, int y, int z);
 ///
 /// @param u (u, v) Texture coordinates (0 - texturesize).
 /// @param v (u, v) Texture coordinates (0 - texturesize).
-void NE_PolyTexCoord(int u, int v);
+static inline void NE_PolyTexCoord(int u, int v)
+{
+    GFX_TEX_COORD = TEXTURE_PACK(inttot16(u), inttot16(v));
+}
 
 /// Flags for NE_PolyFormat() to enable lights.
 typedef enum {
@@ -231,7 +248,13 @@ void NE_PolyFormat(u32 alpha, u32 id, NE_LightEnum lights,
 /// It only works with opaque or wireframe polygons.
 ///
 /// @param value True enables it, false disables it.
-void NE_OutliningEnable(bool value);
+static inline void NE_OutliningEnable(bool value)
+{
+    if (value)
+        GFX_CONTROL |= GL_OUTLINE;
+    else
+        GFX_CONTROL &= ~GL_OUTLINE;
+}
 
 /// Set outlining color for the specified index.
 ///
@@ -257,7 +280,13 @@ void NE_ShadingEnable(bool value);
 /// By default, toon shading is selected.
 ///
 /// @param value True enables highlight shading, false enables toon shading.
-void NE_ToonHighlightEnable(bool value);
+static inline void NE_ToonHighlightEnable(bool value)
+{
+    if (value)
+        GFX_CONTROL |= GL_TOON_HIGHLIGHT;
+    else
+        GFX_CONTROL &= ~GL_TOON_HIGHLIGHT;
+}
 
 /// Set color and related values of the rear plane.
 ///
@@ -296,7 +325,10 @@ void NE_ClearBMPEnable(bool value);
 ///
 /// @param x Scroll on the X axis (0 - 255).
 /// @param y Scroll on the Y axis (0 - 255).
-void NE_ClearBMPScroll(u32 x, u32 y);
+static inline void NE_ClearBMPScroll(u32 x, u32 y)
+{
+    REG_CLRIMAGE_OFFSET = (x & 0xFF) | ((y & 0xFF) << 8);
+}
 
 /// Enables fog and sets its parameters.
 ///
@@ -320,7 +352,10 @@ void NE_FogEnable(u32 shift, u32 color, u32 alpha, int mass, int depth);
 void NE_FogEnableBackground(bool value);
 
 /// Disable fog.
-void NE_FogDisable(void);
+static inline void NE_FogDisable(void)
+{
+    GFX_CONTROL &= ~(GL_FOG | (15 << 8));
+}
 
 /// TODO: Function to set value of DISP_1DOT_DEPTH
 
diff --git a/source/NEPolygon.c b/source/NEPolygon.c
index 1c76a7c..685cfb2 100644
--- a/source/NEPolygon.c
+++ b/source/NEPolygon.c
@@ -8,11 +8,6 @@
 
 /// @file NEPolygon.c
 
-void NE_PolyColor(u32 color)
-{
-    GFX_COLOR = color;
-}
-
 void NE_LightOff(int index)
 {
     NE_AssertMinMax(0, index, 3, "Invalid light index %d", index);
@@ -87,32 +82,6 @@ void NE_ShininessTableGenerate(NE_ShininessFunction function)
         GFX_SHININESS = table[i];
 }
 
-void NE_PolyBegin(int mode)
-{
-    GFX_BEGIN = mode;
-}
-
-void NE_PolyEnd(void)
-{
-    GFX_END = 0;
-}
-
-void NE_PolyNormalI(int x, int y, int z)
-{
-    GFX_NORMAL = NORMAL_PACK(x, y, z);
-}
-
-void NE_PolyVertexI(int x, int y, int z)
-{
-    GFX_VERTEX16 = (y << 16) | (x & 0xFFFF);
-    GFX_VERTEX16 = (uint32_t)(uint16_t)z;
-}
-
-void NE_PolyTexCoord(int u, int v)
-{
-    GFX_TEX_COORD = TEXTURE_PACK(inttot16(u), inttot16(v));
-}
-
 void NE_PolyFormat(u32 alpha, u32 id, NE_LightEnum lights,
                    NE_CullingEnum culling, NE_OtherFormatEnum other)
 {
@@ -123,14 +92,6 @@ void NE_PolyFormat(u32 alpha, u32 id, NE_LightEnum lights,
                     | lights | culling | other;
 }
 
-void NE_OutliningEnable(bool value)
-{
-    if (value)
-        GFX_CONTROL |= GL_OUTLINE;
-    else
-        GFX_CONTROL &= ~GL_OUTLINE;
-}
-
 void NE_OutliningSetColor(u32 index, u32 color)
 {
     NE_AssertMinMax(0, index, 7, "Invalaid outlining color index %lu", index);
@@ -154,14 +115,6 @@ void NE_ShadingEnable(bool value)
     }
 }
 
-void NE_ToonHighlightEnable(bool value)
-{
-    if (value)
-        GFX_CONTROL |= GL_TOON_HIGHLIGHT;
-    else
-        GFX_CONTROL &= ~GL_TOON_HIGHLIGHT;
-}
-
 void NE_FogEnable(u32 shift, u32 color, u32 alpha, int mass, int depth)
 {
     NE_FogDisable();
@@ -201,11 +154,6 @@ void NE_FogEnableBackground(bool value)
     GFX_CLEAR_COLOR = ne_clearcolor;
 }
 
-void NE_FogDisable(void)
-{
-    GFX_CONTROL &= ~(GL_FOG | (15 << 8));
-}
-
 void NE_ClearColorSet(u32 color, u32 alpha, u32 id)
 {
     NE_AssertMinMax(0, alpha, 31, "Invalid alpha value %lu", alpha);
@@ -245,8 +193,3 @@ void NE_ClearBMPEnable(bool value)
         //vramSetBankD(VRAM_D_LCD);
     }
 }
-
-void NE_ClearBMPScroll(u32 x, u32 y)
-{
-    REG_CLRIMAGE_OFFSET = (x & 0xFF) | ((y & 0xFF) << 8);
-}