Shapes, RLGL, Math, Gui and Easings to new style.

1 files changed, 127 insertions, 432 deletions

diff --git a/src/rgui.c b/src/rgui.c
index 2a8e290..ce6c4a7 100644
--- a/src/rgui.c
+++ b/src/rgui.c
@@ -13,7 +13,7 @@
 /*
 > RL.GuiEnable()
 
-Enable gui controls ( global state )
+Enable gui controls (global state)
 */
 int lguiGuiEnable( lua_State *L ) {
 	GuiEnable();
@@ -24,7 +24,7 @@ int lguiGuiEnable( lua_State *L ) {
 /*
 > RL.GuiDisable()
 
-Disable gui controls ( global state )
+Disable gui controls (global state)
 */
 int lguiGuiDisable( lua_State *L ) {
 	GuiDisable();
@@ -35,7 +35,7 @@ int lguiGuiDisable( lua_State *L ) {
 /*
 > RL.GuiLock()
 
-Lock gui controls ( global state )
+Lock gui controls (global state)
 */
 int lguiGuiLock( lua_State *L ) {
 	GuiLock();
@@ -46,7 +46,7 @@ int lguiGuiLock( lua_State *L ) {
 /*
 > RL.GuiUnlock()
 
-Unlock gui controls ( global state )
+Unlock gui controls (global state)
 */
 int lguiGuiUnlock( lua_State *L ) {
 	GuiUnlock();
@@ -57,7 +57,7 @@ int lguiGuiUnlock( lua_State *L ) {
 /*
 > locked = RL.GuiIsLocked()
 
-Check if gui is locked ( global state )
+Check if gui is locked (global state)
 
 - Success return bool
 */
@@ -68,53 +68,35 @@ int lguiGuiIsLocked( lua_State *L ) {
 }
 
 /*
-> success = RL.GuiFade( float alpha )
+> RL.GuiFade( float alpha )
 
-Set gui controls alpha ( global state ), alpha goes from 0.0f to 1.0f
-
-- Failure return false
-- Success return true
+Set gui controls alpha (global state), alpha goes from 0.0f to 1.0f
 */
 int lguiGuiFade( lua_State *L ) {
-	if ( !lua_isnumber( L, 1 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiFade( float alpha )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
-	float alpha = lua_tonumber( L, 1 );
+	float alpha = luaL_checknumber( L, 1 );
 
 	GuiFade( alpha );
-	lua_pushboolean( L, true );
 
-	return 1;
+	return 0;
 }
 
 /*
-> success = RL.GuiSetState( int state )
-
-Set gui state ( global state )
+> RL.GuiSetState( int state )
 
-- Failure return false
-- Success return true
+Set gui state (global state)
 */
 int lguiGuiSetState( lua_State *L ) {
-	if ( !lua_isnumber( L, 1 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiSetState( int state )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
-	int state = lua_tointeger( L, 1 );
+	int state = luaL_checkinteger( L, 1 );
 
 	GuiSetState( state );
-	lua_pushboolean( L, true );
 
-	return 1;
+	return 0;
 }
 
 /*
 > state = RL.GuiGetState()
 
-Get gui state ( global state )
+Get gui state (global state)
 
 - Success return int
 */
@@ -144,9 +126,9 @@ int lguiGuiSetFont( lua_State *L ) {
 /*
 > font = RL.GuiGetFont()
 
-Get gui custom font ( global state )
+Get gui custom font (global state)
 
-- Success return int
+- Success return Font
 */
 int lguiGuiGetFont( lua_State *L ) {
 	uluaPushFont( L, GuiGetFont() );
@@ -159,27 +141,18 @@ int lguiGuiGetFont( lua_State *L ) {
 */
 
 /*
-> success = RL.GuiSetStyle( int control, int property, int value )
+> RL.GuiSetStyle( int control, int property, int value )
 
 Set one style property
-
-- Failure return false
-- Success return true
 */
 int lguiGuiSetStyle( lua_State *L ) {
-	if ( !lua_isnumber( L, 1 ) || !lua_isnumber( L, 2 ) || !lua_isnumber( L, 3 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiSetStyle( int control, int property, int value )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
-	int control = lua_tointeger( L, 1 );
-	int property = lua_tointeger( L, 2 );
-	int value = lua_tointeger( L, 3 );
+	int control = luaL_checkinteger( L, 1 );
+	int property = luaL_checkinteger( L, 2 );
+	int value = luaL_checkinteger( L, 3 );
 
 	GuiSetStyle( control, property, value );
-	lua_pushboolean( L, true );
 
-	return 1;
+	return 0;
 }
 
 /*
@@ -187,17 +160,11 @@ int lguiGuiSetStyle( lua_State *L ) {
 
 Get one style property
 
-- Failure return false
 - Success return int
 */
 int lguiGuiGetStyle( lua_State *L ) {
-	if ( !lua_isnumber( L, 1 ) || !lua_isnumber( L, 2 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiGetStyle( int control, int property )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
-	int control = lua_tointeger( L, 1 );
-	int property = lua_tointeger( L, 2 );
+	int control = luaL_checkinteger( L, 1 );
+	int property = luaL_checkinteger( L, 2 );
 
 	lua_pushinteger( L, GuiGetStyle( control, property ) );
 
@@ -207,27 +174,20 @@ int lguiGuiGetStyle( lua_State *L ) {
 /*
 > success = RL.GuiLoadStyle( string fileName )
 
-Load style file over global style variable ( .rgs )
+Load style file over global style variable (.rgs)
 
 - Failure return false
 - Success return true
 */
 int lguiGuiLoadStyle( lua_State *L ) {
-	if ( !lua_isstring( L, 1 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiLoadStyle( string fileName )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
-
-	if ( FileExists( lua_tostring( L, 1 ) ) ) {
+	if ( FileExists( luaL_checkstring( L, 1 ) ) ) {
 		GuiLoadStyle( lua_tostring( L, 1 ) );
 		lua_pushboolean( L, true );
+
 		return 1;
 	}
-	else {
-		lua_pushboolean( L, false );
-		return 1;
-	}
+	TraceLog( state->logLevelInvalid, "Invalid file '%s'", lua_tostring( L, 1 ) );
+	lua_pushboolean( L, false );
 
 	return 1;
 }
@@ -252,86 +212,53 @@ int lguiGuiLoadStyleDefault( lua_State *L ) {
 
 Window Box control, shows a window that can be closed
 
-- Failure return nil
 - Success return bool
 */
 int lguiGuiWindowBox( lua_State *L ) {
-	if ( !lua_istable( L, 1 ) || !lua_isstring( L, 2 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiWindowBox( Rectangle bounds, string title )" );
-		lua_pushnil( L );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
 
-	lua_pushboolean( L, GuiWindowBox( bounds, lua_tostring( L, 2 ) ) );
+	lua_pushboolean( L, GuiWindowBox( bounds, luaL_checkstring( L, 2 ) ) );
 
 	return 1;
 }
 
 /*
-> success = RL.GuiGroupBox( Rectangle bounds, string text )
+> RL.GuiGroupBox( Rectangle bounds, string text )
 
 Group Box control with text name
-
-- Failure return false
-- Success return true
 */
 int lguiGuiGroupBox( lua_State *L ) {
-	if ( !lua_istable( L, 1 ) || !lua_isstring( L, 2 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiGroupBox( Rectangle bounds, string text )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
 
-	GuiGroupBox( bounds, lua_tostring( L, 2 ) );
-	lua_pushboolean( L, true );
+	GuiGroupBox( bounds, luaL_checkstring( L, 2 ) );
 
-	return 1;
+	return 0;
 }
 
 /*
-> success = RL.GuiLine( Rectangle bounds, string text )
+> RL.GuiLine( Rectangle bounds, string text )
 
 Line separator control, could contain text
-
-- Failure return false
-- Success return true
 */
 int lguiGuiLine( lua_State *L ) {
-	if ( !lua_istable( L, 1 ) || !lua_isstring( L, 2 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiLine( Rectangle bounds, string text )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
 
-	GuiLine( bounds, lua_tostring( L, 2 ) );
-	lua_pushboolean( L, true );
+	GuiLine( bounds, luaL_checkstring( L, 2 ) );
 
-	return 1;
+	return 0;
 }
 
 /*
-> success = RL.GuiPanel( Rectangle bounds, string text )
+> RL.GuiPanel( Rectangle bounds, string text )
 
 Panel control, useful to group controls
-
-- Failure return false
-- Success return true
 */
 int lguiGuiPanel( lua_State *L ) {
-	if ( !lua_istable( L, 1 ) || !lua_isstring( L, 2 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiPanel( Rectangle bounds, string text )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
 
-	GuiPanel( bounds, lua_tostring( L, 2 ) );
-	lua_pushboolean( L, true );
+	GuiPanel( bounds, luaL_checkstring( L, 2 ) );
 
-	return 1;
+	return 0;
 }
 
 /*
@@ -339,20 +266,14 @@ int lguiGuiPanel( lua_State *L ) {
 
 Scroll Panel control
 
-- Failure return false
 - Success return Rectangle, Vector2
 */
 int lguiGuiScrollPanel( lua_State *L ) {
-	if ( !lua_istable( L, 1 ) || !lua_isstring( L, 2 ) || !lua_istable( L, 3 ) || !lua_istable( L, 4 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiScrollPanel( Rectangle bounds, string text, Rectangle content, Vector2 scroll )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
 	Rectangle content = uluaGetRectangleIndex( L, 3 );
 	Vector2 scroll = uluaGetVector2Index( L, 4 );
 
-	uluaPushRectangle( L, GuiScrollPanel( bounds, lua_tostring( L, 2 ), content, &scroll ) );
+	uluaPushRectangle( L, GuiScrollPanel( bounds, luaL_checkstring( L, 2 ), content, &scroll ) );
 	uluaPushVector2( L, scroll );
 
 	return 2;
@@ -363,25 +284,16 @@ int lguiGuiScrollPanel( lua_State *L ) {
 */
 
 /*
-> success = RL.GuiLabel( Rectangle bounds, string text )
+> RL.GuiLabel( Rectangle bounds, string text )
 
 Label control, shows text
-
-- Failure return false
-- Success return true
 */
 int lguiGuiLabel( lua_State *L ) {
-	if ( !lua_istable( L, 1 ) || !lua_isstring( L, 2 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiLabel( Rectangle bounds, string text )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
 
-	GuiLabel( bounds, lua_tostring( L, 2 ) );
-	lua_pushboolean( L, true );
+	GuiLabel( bounds, luaL_checkstring( L, 2 ) );
 
-	return 1;
+	return 0;
 }
 
 /*
@@ -389,18 +301,12 @@ int lguiGuiLabel( lua_State *L ) {
 
 Button control, returns true when clicked
 
-- Failure return nil
 - Success return boolean
 */
 int lguiGuiButton( lua_State *L ) {
-	if ( !lua_istable( L, 1 ) || !lua_isstring( L, 2 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiButton( Rectangle bounds, string text )" );
-		lua_pushnil( L );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
 
-	lua_pushboolean( L, GuiButton( bounds, lua_tostring( L, 2 ) ) );
+	lua_pushboolean( L, GuiButton( bounds, luaL_checkstring( L, 2 ) ) );
 
 	return 1;
 }
@@ -410,18 +316,12 @@ int lguiGuiButton( lua_State *L ) {
 
 Label button control, show true when clicked
 
-- Failure return nil
 - Success return boolean
 */
 int lguiGuiLabelButton( lua_State *L ) {
-	if ( !lua_istable( L, 1 ) || !lua_isstring( L, 2 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiLabelButton( Rectangle bounds, string text )" );
-		lua_pushnil( L );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
 
-	lua_pushboolean( L, GuiLabelButton( bounds, lua_tostring( L, 2 ) ) );
+	lua_pushboolean( L, GuiLabelButton( bounds, luaL_checkstring( L, 2 ) ) );
 
 	return 1;
 }
@@ -431,19 +331,13 @@ int lguiGuiLabelButton( lua_State *L ) {
 
 Toggle Button control, returns true when active
 
-- Failure return nil
 - Success return boolean
 */
 int lguiGuiToggle( lua_State *L ) {
-	if ( !lua_istable( L, 1 ) || !lua_isstring( L, 2 ) || !lua_isboolean( L, 3 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiToggle( Rectangle bounds, string text, bool active )" );
-		lua_pushnil( L );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
 	bool checked = lua_toboolean( L, 3 );
 
-	lua_pushboolean( L, GuiToggle( bounds, lua_tostring( L, 2 ), checked ) );
+	lua_pushboolean( L, GuiToggle( bounds, luaL_checkstring( L, 2 ), checked ) );
 
 	return 1;
 }
@@ -453,19 +347,13 @@ int lguiGuiToggle( lua_State *L ) {
 
 Toggle Group control, returns active toggle index
 
-- Failure return false
 - Success return int
 */
 int lguiGuiToggleGroup( lua_State *L ) {
-	if ( !lua_istable( L, 1 ) || !lua_isstring( L, 2 ) || !lua_isnumber( L, 3 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiToggleGroup( Rectangle bounds, string text, bool active )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
-	int active = lua_tointeger( L, 3 );
+	int active = luaL_checkinteger( L, 3 );
 
-	lua_pushinteger( L, GuiToggleGroup( bounds, lua_tostring( L, 2 ), active ) );
+	lua_pushinteger( L, GuiToggleGroup( bounds, luaL_checkstring( L, 2 ), active ) );
 
 	return 1;
 }
@@ -475,19 +363,13 @@ int lguiGuiToggleGroup( lua_State *L ) {
 
 Check Box control, returns true when active
 
-- Failure return nil
 - Success return boolean
 */
 int lguiGuiCheckBox( lua_State *L ) {
-	if ( !lua_istable( L, 1 ) || !lua_isstring( L, 2 ) || !lua_isboolean( L, 3 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiCheckBox( Rectangle bounds, string text, bool checked )" );
-		lua_pushnil( L );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
 	bool checked = lua_toboolean( L, 3 );
 
-	lua_pushboolean( L, GuiCheckBox( bounds, lua_tostring( L, 2 ), checked ) );
+	lua_pushboolean( L, GuiCheckBox( bounds, luaL_checkstring( L, 2 ), checked ) );
 
 	return 1;
 }
@@ -497,19 +379,13 @@ int lguiGuiCheckBox( lua_State *L ) {
 
 Combo Box control, returns selected item index
 
-- Failure return nil
 - Success return int
 */
 int lguiGuiComboBox( lua_State *L ) {
-	if ( !lua_istable( L, 1 ) || !lua_isstring( L, 2 ) || !lua_isnumber( L, 3 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiComboBox( Rectangle bounds, string text, int active )" );
-		lua_pushnil( L );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
-	int active = lua_tointeger( L, 3 );
+	int active = luaL_checkinteger( L, 3 );
 
-	lua_pushinteger( L, GuiComboBox( bounds, lua_tostring( L, 2 ), active ) );
+	lua_pushinteger( L, GuiComboBox( bounds, luaL_checkstring( L, 2 ), active ) );
 
 	return 1;
 }
@@ -519,20 +395,14 @@ int lguiGuiComboBox( lua_State *L ) {
 
 Text Box control, updates input text
 
-- Failure return nil
 - Success return boolean, string
 */
 int lguiGuiTextBox( lua_State *L ) {
-	if ( !lua_istable( L, 1 ) || !lua_isstring( L, 2 ) || !lua_isnumber( L, 3 ) || !lua_isboolean( L, 4 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiTextBox( Rectangle bounds, string text, int textSize, bool editMode )" );
-		lua_pushnil( L );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
-	int textSize = lua_tointeger( L, 3 );
+	int textSize = luaL_checkinteger( L, 3 );
 	// char text[ STRING_LEN ] = { '\0' };
 	char text[ textSize + 1 ];
-	strcpy( text, lua_tostring( L, 2 ) );
+	strcpy( text, luaL_checkstring( L, 2 ) );
 	bool editMode = lua_toboolean( L, 4 );
 
 	lua_pushboolean( L, GuiTextBox( bounds, text, textSize, editMode ) );
@@ -546,20 +416,14 @@ int lguiGuiTextBox( lua_State *L ) {
 
 Text Box control with multiple lines
 
-- Failure return nil
 - Success return boolean, string
 */
 int lguiGuiTextBoxMulti( lua_State *L ) {
-	if ( !lua_istable( L, 1 ) || !lua_isstring( L, 2 ) || !lua_isnumber( L, 3 ) || !lua_isboolean( L, 4 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiTextBoxMulti( Rectangle bounds, string text, int textSize, bool editMode )" );
-		lua_pushnil( L );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
-	int textSize = lua_tointeger( L, 3 );
+	int textSize = luaL_checkinteger( L, 3 );
 	// char text[ STRING_LEN ] = { '\0' };
 	char text[ textSize + 1 ];
-	strcpy( text, lua_tostring( L, 2 ) );
+	strcpy( text, luaL_checkstring( L, 2 ) );
 	bool editMode = lua_toboolean( L, 4 );
 
 	lua_pushboolean( L, GuiTextBoxMulti( bounds, text, textSize, editMode ) );
@@ -573,23 +437,16 @@ int lguiGuiTextBoxMulti( lua_State *L ) {
 
 Spinner control, returns selected value
 
-- Failure return nil
 - Success return boolean, int
 */
 int lguiGuiSpinner( lua_State *L ) {
-	if ( !lua_istable( L, 1 ) || !lua_isstring( L, 2 ) || !lua_isnumber( L, 3 )
-	|| !lua_isnumber( L, 4 ) || !lua_isnumber( L, 5 ) || !lua_isboolean( L, 6 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiSpinner( Rectangle bounds, string text, int value, int minValue, int maxValue, bool editMode )" );
-		lua_pushnil( L );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
-	int value = lua_tointeger( L, 3 );
-	int minValue = lua_tointeger( L, 4 );
-	int maxValue = lua_tointeger( L, 5 );
+	int value = luaL_checkinteger( L, 3 );
+	int minValue = luaL_checkinteger( L, 4 );
+	int maxValue = luaL_checkinteger( L, 5 );
 	bool editMode = lua_toboolean( L, 6 );
 
-	lua_pushboolean( L, GuiSpinner( bounds, lua_tostring( L, 2 ), &value, minValue, maxValue, editMode ) );
+	lua_pushboolean( L, GuiSpinner( bounds, luaL_checkstring( L, 2 ), &value, minValue, maxValue, editMode ) );
 	lua_pushinteger( L, value );
 
 	return 2;
@@ -600,23 +457,16 @@ int lguiGuiSpinner( lua_State *L ) {
 
 Value Box control, updates input text with numbers
 
-- Failure return nil
 - Success return boolean, int
 */
 int lguiGuiValueBox( lua_State *L ) {
-	if ( !lua_istable( L, 1 ) || !lua_isstring( L, 2 ) || !lua_isnumber( L, 3 )
-	|| !lua_isnumber( L, 4 ) || !lua_isnumber( L, 5 ) || !lua_isboolean( L, 6 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiValueBox( Rectangle bounds, string text, int value, int minValue, int maxValue, bool editMode )" );
-		lua_pushnil( L );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
-	int value = lua_tointeger( L, 3 );
-	int minValue = lua_tointeger( L, 4 );
-	int maxValue = lua_tointeger( L, 5 );
+	int value = luaL_checkinteger( L, 3 );
+	int minValue = luaL_checkinteger( L, 4 );
+	int maxValue = luaL_checkinteger( L, 5 );
 	bool editMode = lua_toboolean( L, 6 );
 
-	lua_pushboolean( L, GuiValueBox( bounds, lua_tostring( L, 2 ), &value, minValue, maxValue, editMode ) );
+	lua_pushboolean( L, GuiValueBox( bounds, luaL_checkstring( L, 2 ), &value, minValue, maxValue, editMode ) );
 	lua_pushinteger( L, value );
 
 	return 2;
@@ -627,22 +477,15 @@ int lguiGuiValueBox( lua_State *L ) {
 
 Slider control, returns selected value
 
-- Failure return nil
 - Success return float
 */
 int lguiGuiSlider( lua_State *L ) {
-	if ( !lua_istable( L, 1 ) || !lua_isstring( L, 2 ) || !lua_isstring( L, 3 )
-	|| !lua_isnumber( L, 4 ) || !lua_isnumber( L, 5 ) || !lua_isnumber( L, 6 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiSlider( Rectangle bounds, string textLeft, string textRight, float value, float minValue, float maxValue )" );
-		lua_pushnil( L );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
-	float value = lua_tonumber( L, 4 );
-	float minValue = lua_tonumber( L, 5 );
-	float maxValue = lua_tonumber( L, 6 );
+	float value = luaL_checknumber( L, 4 );
+	float minValue = luaL_checknumber( L, 5 );
+	float maxValue = luaL_checknumber( L, 6 );
 
-	lua_pushnumber( L, GuiSlider( bounds, lua_tostring( L, 2 ), lua_tostring( L, 3 ), value, minValue, maxValue ) );
+	lua_pushnumber( L, GuiSlider( bounds, luaL_checkstring( L, 2 ), luaL_checkstring( L, 3 ), value, minValue, maxValue ) );
 
 	return 1;
 }
@@ -652,22 +495,15 @@ int lguiGuiSlider( lua_State *L ) {
 
 Slider Bar control, returns selected value
 
-- Failure return nil
 - Success return float
 */
 int lguiGuiSliderBar( lua_State *L ) {
-	if ( !lua_istable( L, 1 ) || !lua_isstring( L, 2 ) || !lua_isstring( L, 3 )
-	|| !lua_isnumber( L, 4 ) || !lua_isnumber( L, 5 ) || !lua_isnumber( L, 6 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiSliderBar( Rectangle bounds, string textLeft, string textRight, float value, float minValue, float maxValue )" );
-		lua_pushnil( L );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
-	float value = lua_tonumber( L, 4 );
-	float minValue = lua_tonumber( L, 5 );
-	float maxValue = lua_tonumber( L, 6 );
+	float value = luaL_checknumber( L, 4 );
+	float minValue = luaL_checknumber( L, 5 );
+	float maxValue = luaL_checknumber( L, 6 );
 
-	lua_pushnumber( L, GuiSliderBar( bounds, lua_tostring( L, 2 ), lua_tostring( L, 3 ), value, minValue, maxValue ) );
+	lua_pushnumber( L, GuiSliderBar( bounds, luaL_checkstring( L, 2 ), luaL_checkstring( L, 3 ), value, minValue, maxValue ) );
 
 	return 1;
 }
@@ -677,22 +513,15 @@ int lguiGuiSliderBar( lua_State *L ) {
 
 Progress Bar control, shows current progress value
 
-- Failure return nil
 - Success return float
 */
 int lguiGuiProgressBar( lua_State *L ) {
-	if ( !lua_istable( L, 1 ) || !lua_isstring( L, 2 ) || !lua_isstring( L, 3 )
-	|| !lua_isnumber( L, 4 ) || !lua_isnumber( L, 5 ) || !lua_isnumber( L, 6 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiProgressBar( Rectangle bounds, string textLeft, string textRight, float value, float minValue, float maxValue )" );
-		lua_pushnil( L );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
-	float value = lua_tonumber( L, 4 );
-	float minValue = lua_tonumber( L, 5 );
-	float maxValue = lua_tonumber( L, 6 );
+	float value = luaL_checknumber( L, 4 );
+	float minValue = luaL_checknumber( L, 5 );
+	float maxValue = luaL_checknumber( L, 6 );
 
-	lua_pushnumber( L, GuiProgressBar( bounds, lua_tostring( L, 2 ), lua_tostring( L, 3 ), value, minValue, maxValue ) );
+	lua_pushnumber( L, GuiProgressBar( bounds, luaL_checkstring( L, 2 ), luaL_checkstring( L, 3 ), value, minValue, maxValue ) );
 
 	return 1;
 }
@@ -702,19 +531,13 @@ int lguiGuiProgressBar( lua_State *L ) {
 
 Scroll Bar control
 
-- Failure return nil
 - Success return int
 */
 int lguiGuiScrollBar( lua_State *L ) {
-	if ( !lua_istable( L, 1 )	|| !lua_isnumber( L, 2 ) || !lua_isnumber( L, 3 ) || !lua_isnumber( L, 4 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiScrollBar( Rectangle bounds, int value, int minValue, int maxValue )" );
-		lua_pushnil( L );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
-	int value = lua_tointeger( L, 2 );
-	int minValue = lua_tointeger( L, 3 );
-	int maxValue = lua_tointeger( L, 4 );
+	int value = luaL_checkinteger( L, 2 );
+	int minValue = luaL_checkinteger( L, 3 );
+	int maxValue = luaL_checkinteger( L, 4 );
 
 	lua_pushinteger( L, GuiScrollBar( bounds, value, minValue, maxValue ) );
 
@@ -726,67 +549,43 @@ int lguiGuiScrollBar( lua_State *L ) {
 
 Dropdown Box control, returns selected item
 
-- Failure return nil
 - Success return bool, int
 */
 int lguiGuiDropdownBox( lua_State *L ) {
-	if ( !lua_istable( L, 1 )	|| !lua_isstring( L, 2 ) || !lua_isnumber( L, 3 ) || !lua_isboolean( L, 4 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiDropdownBox( Rectangle bounds, string text, int active, bool editMode )" );
-		lua_pushnil( L );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
-	int active = lua_tointeger( L, 3 );
+	int active = luaL_checkinteger( L, 3 );
 	bool editMode = lua_toboolean( L, 4 );
 
-	lua_pushboolean( L, GuiDropdownBox( bounds, lua_tostring( L, 2 ), &active, editMode ) );
+	lua_pushboolean( L, GuiDropdownBox( bounds, luaL_checkstring( L, 2 ), &active, editMode ) );
 	lua_pushinteger( L, active );
 
 	return 2;
 }
 
 /*
-> success = RL.GuiStatusBar( Rectangle bounds, string text )
+> RL.GuiStatusBar( Rectangle bounds, string text )
 
 Status Bar control, shows info text
-
-- Failure return false
-- Success return true
 */
 int lguiGuiStatusBar( lua_State *L ) {
-	if ( !lua_istable( L, 1 )	|| !lua_isstring( L, 2 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiStatusBar( Rectangle bounds, string text )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
 
-	GuiStatusBar( bounds, lua_tostring( L, 2 ) );
-	lua_pushboolean( L, true );
+	GuiStatusBar( bounds, luaL_checkstring( L, 2 ) );
 
-	return 1;
+	return 0;
 }
 
 /*
-> success = RL.GuiDummyRec( Rectangle bounds, string text )
+> RL.GuiDummyRec( Rectangle bounds, string text )
 
 Dummy control for placeholders
-
-- Failure return false
-- Success return true
 */
 int lguiGuiDummyRec( lua_State *L ) {
-	if ( !lua_istable( L, 1 )	|| !lua_isstring( L, 2 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiDummyRec( Rectangle bounds, string text )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
 
-	GuiDummyRec( bounds, lua_tostring( L, 2 ) );
-	lua_pushboolean( L, true );
+	GuiDummyRec( bounds, luaL_checkstring( L, 2 ) );
 
-	return 1;
+	return 0;
 }
 
 /*
@@ -794,20 +593,14 @@ int lguiGuiDummyRec( lua_State *L ) {
 
 Grid control, returns mouse cell position
 
-- Failure return false
 - Success return Vector2
 */
 int lguiGuiGrid( lua_State *L ) {
-	if ( !lua_istable( L, 1 )	|| !lua_isstring( L, 2 ) || !lua_isnumber( L, 3 ) || !lua_isnumber( L, 4 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiGrid( Rectangle bounds, string text, float spacing, int subdivs )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
-	float spacing = lua_tonumber( L, 3 );
-	int subdivs = lua_tointeger( L, 4 );
+	float spacing = luaL_checknumber( L, 3 );
+	int subdivs = luaL_checkinteger( L, 4 );
 
-	uluaPushVector2( L, GuiGrid( bounds, lua_tostring( L, 2 ), spacing, subdivs ) );
+	uluaPushVector2( L, GuiGrid( bounds, luaL_checkstring( L, 2 ), spacing, subdivs ) );
 
 	return 1;
 }
@@ -821,20 +614,14 @@ int lguiGuiGrid( lua_State *L ) {
 
 List View control, returns selected list item index and scroll index
 
-- Failure return nil
 - Success return int, int
 */
 int lguiGuiListView( lua_State *L ) {
-	if ( !lua_istable( L, 1 )	|| !lua_isstring( L, 2 ) || !lua_isnumber( L, 3 ) || !lua_isnumber( L, 4 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiListView( Rectangle bounds, string text, int scrollIndex, int active )" );
-		lua_pushnil( L );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
-	int scrollIndex = lua_tointeger( L, 3 );
-	int active = lua_tointeger( L, 4 );
+	int scrollIndex = luaL_checkinteger( L, 3 );
+	int active = luaL_checkinteger( L, 4 );
 
-	lua_pushinteger( L, GuiListView( bounds, lua_tostring( L, 2 ), &scrollIndex, active ) );
+	lua_pushinteger( L, GuiListView( bounds, luaL_checkstring( L, 2 ), &scrollIndex, active ) );
 	lua_pushinteger( L, scrollIndex );
 
 	return 2;
@@ -845,22 +632,15 @@ int lguiGuiListView( lua_State *L ) {
 
 List View with extended parameters, returns selected list item index, scroll index and focus
 
-- Failure return nil
 - Success return int, int, int
 */
 int lguiGuiListViewEx( lua_State *L ) {
-	if ( !lua_istable( L, 1 )	|| !lua_isstring( L, 2 ) || !lua_isnumber( L, 3 )
-	|| !lua_isnumber( L, 4 ) || !lua_isnumber( L, 5 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiListViewEx( Rectangle bounds, string text, int focus, int scrollIndex, int active )" );
-		lua_pushnil( L );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
-	int focus = lua_tointeger( L, 3 );
-	int scrollIndex = lua_tointeger( L, 4 );
-	int active = lua_tointeger( L, 5 );
+	int focus = luaL_checkinteger( L, 3 );
+	int scrollIndex = luaL_checkinteger( L, 4 );
+	int active = luaL_checkinteger( L, 5 );
 	int count = 0;
-	const char **text = GuiTextSplit( lua_tostring( L, 2 ), &count, NULL );
+	const char **text = GuiTextSplit( luaL_checkstring( L, 2 ), &count, NULL );
 
 	lua_pushinteger( L, GuiListViewEx( bounds, text, count, &focus, &scrollIndex, active ) );
 	lua_pushinteger( L, scrollIndex );
@@ -872,20 +652,14 @@ int lguiGuiListViewEx( lua_State *L ) {
 /*
 > buttonIndex = RL.GuiMessageBox( Rectangle bounds, string title, string message, string buttons )
 
-Message Box control, displays a message, returns button index ( 0 is x button )
+Message Box control, displays a message, returns button index (0 is x button)
 
-- Failure return false
 - Success return int
 */
 int lguiGuiMessageBox( lua_State *L ) {
-	if ( !lua_istable( L, 1 )	|| !lua_isstring( L, 2 ) || !lua_isstring( L, 3 ) || !lua_isstring( L, 4 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiMessageBox( Rectangle bounds, string title, string message, string buttons )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
 
-	lua_pushinteger( L, GuiMessageBox( bounds, lua_tostring( L, 2 ), lua_tostring( L, 3 ), lua_tostring( L, 4 ) ) );
+	lua_pushinteger( L, GuiMessageBox( bounds, luaL_checkstring( L, 2 ), luaL_checkstring( L, 3 ), luaL_checkstring( L, 4 ) ) );
 
 	return 1;
 }
@@ -895,23 +669,16 @@ int lguiGuiMessageBox( lua_State *L ) {
 
 Text Input Box control, ask for text, supports secret
 
-- Failure return false
 - Success return int, string, int
 */
 int lguiGuiTextInputBox( lua_State *L ) {
-	if ( !lua_istable( L, 1 )	|| !lua_isstring( L, 2 ) || !lua_isstring( L, 3 ) || !lua_isstring( L, 4 )
-	|| !lua_isstring( L, 5 ) || !lua_isnumber( L, 6 ) || !lua_isnumber( L, 7 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiTextInputBox( Rectangle bounds, string title, string message, string buttons, string text, int textMaxSize, int secretViewActive )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
-	int textMaxSize = lua_tointeger( L, 6 );
-	int secretViewActive = lua_tointeger( L, 7 );
+	int textMaxSize = luaL_checkinteger( L, 6 );
+	int secretViewActive = luaL_checkinteger( L, 7 );
 	char text[ textMaxSize + 1 ];
-	strcpy( text, lua_tostring( L, 5 ) );
+	strcpy( text, luaL_checkstring( L, 5 ) );
 
-	lua_pushinteger( L, GuiTextInputBox( bounds, lua_tostring( L, 2 ), lua_tostring( L, 3 ), lua_tostring( L, 4 ), text, textMaxSize, &secretViewActive ) );
+	lua_pushinteger( L, GuiTextInputBox( bounds, luaL_checkstring( L, 2 ), luaL_checkstring( L, 3 ), luaL_checkstring( L, 4 ), text, textMaxSize, &secretViewActive ) );
 	lua_pushstring( L, text );
 	lua_pushinteger( L, secretViewActive );
 
@@ -921,21 +688,15 @@ int lguiGuiTextInputBox( lua_State *L ) {
 /*
 > color = RL.GuiColorPicker( Rectangle bounds, string text, Color color )
 
-Color Picker control ( multiple color controls )
+Color Picker control (multiple color controls)
 
-- Failure return false
 - Success return Color
 */
 int lguiGuiColorPicker( lua_State *L ) {
-	if ( !lua_istable( L, 1 )	|| !lua_isstring( L, 2 ) || !lua_istable( L, 3 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiColorPicker( Rectangle bounds, string text, Color color )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
 	Color color = uluaGetColorIndex( L, 3 );
 
-	uluaPushColor( L, GuiColorPicker( bounds, lua_tostring( L, 2 ), color ) );
+	uluaPushColor( L, GuiColorPicker( bounds, luaL_checkstring( L, 2 ), color ) );
 
 	return 1;
 }
@@ -945,19 +706,13 @@ int lguiGuiColorPicker( lua_State *L ) {
 
 Color Panel control
 
-- Failure return false
 - Success return Color
 */
 int lguiGuiColorPanel( lua_State *L ) {
-	if ( !lua_istable( L, 1 )	|| !lua_isstring( L, 2 ) || !lua_istable( L, 3 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiColorPanel( Rectangle bounds, string text, Color color )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
 	Color color = uluaGetColorIndex( L, 3 );
 
-	uluaPushColor( L, GuiColorPanel( bounds, lua_tostring( L, 2 ), color ) );
+	uluaPushColor( L, GuiColorPanel( bounds, luaL_checkstring( L, 2 ), color ) );
 
 	return 1;
 }
@@ -967,19 +722,13 @@ int lguiGuiColorPanel( lua_State *L ) {
 
 Color Bar Alpha control
 
-- Failure return false
 - Success return float
 */
 int lguiGuiColorBarAlpha( lua_State *L ) {
-	if ( !lua_istable( L, 1 )	|| !lua_isstring( L, 2 ) || !lua_isnumber( L, 3 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiColorBarAlpha( Rectangle bounds, string text, float alpha )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
-	float alpha = lua_tonumber( L, 3 );
+	float alpha = luaL_checknumber( L, 3 );
 
-	lua_pushnumber( L, GuiColorBarAlpha( bounds, lua_tostring( L, 2 ), alpha ) );
+	lua_pushnumber( L, GuiColorBarAlpha( bounds, luaL_checkstring( L, 2 ), alpha ) );
 
 	return 1;
 }
@@ -989,19 +738,13 @@ int lguiGuiColorBarAlpha( lua_State *L ) {
 
 Color Bar Hue control
 
-- Failure return false
 - Success return float
 */
 int lguiGuiColorBarHue( lua_State *L ) {
-	if ( !lua_istable( L, 1 )	|| !lua_isstring( L, 2 ) || !lua_isnumber( L, 3 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiColorBarHue( Rectangle bounds, string text, float value )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
 	Rectangle bounds = uluaGetRectangleIndex( L, 1 );
-	float value = lua_tonumber( L, 3 );
+	float value = luaL_checknumber( L, 3 );
 
-	lua_pushnumber( L, GuiColorBarHue( bounds, lua_tostring( L, 2 ), value ) );
+	lua_pushnumber( L, GuiColorBarHue( bounds, luaL_checkstring( L, 2 ), value ) );
 
 	return 1;
 }
@@ -1013,120 +756,78 @@ int lguiGuiColorBarHue( lua_State *L ) {
 /*
 > text = RL.GuiIconText( int iconId, string text )
 
-Get text with icon id prepended ( if supported )
+Get text with icon id prepended (if supported)
 
-- Failure return false
 - Success return string
 */
 int lguiGuiIconText( lua_State *L ) {
-	if ( !lua_isnumber( L, 1 ) || !lua_isstring( L, 2 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiIconText( int iconId, string text )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
-	int iconId = lua_tointeger( L, 1 );
+	int iconId = luaL_checkinteger( L, 1 );
 
-	if ( TextIsEqual( lua_tostring( L, 2 ), "" ) ) {
+	if ( TextIsEqual( luaL_checkstring( L, 2 ), "" ) ) {
 		lua_pushstring( L, GuiIconText( iconId, NULL ) );
 	}
 	else {
-		lua_pushstring( L, GuiIconText( iconId, lua_tostring( L, 2 ) ) );
+		lua_pushstring( L, GuiIconText( iconId, luaL_checkstring( L, 2 ) ) );
 	}
 
 	return 1;
 }
 
 /*
-> success = RL.GuiDrawIcon( int iconId, Vector2 pos, int pixelSize, Color color )
+> RL.GuiDrawIcon( int iconId, Vector2 pos, int pixelSize, Color color )
 
 Draw icon
-
-- Failure return false
-- Success return true
 */
 int lguiGuiDrawIcon( lua_State *L ) {
-	if ( !lua_isnumber( L, 1 )	|| !lua_istable( L, 2 ) || !lua_isnumber( L, 3 ) || !lua_istable( L, 4 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiDrawIcon( int iconId, Vector2 pos, int pixelSize, Color color )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
-	int iconId = lua_tointeger( L, 1 );
+	int iconId = luaL_checkinteger( L, 1 );
 	Vector2 pos = uluaGetVector2Index( L, 2 );
-	int pixelSize = lua_tointeger( L, 3 );
+	int pixelSize = luaL_checkinteger( L, 3 );
 	Color color = uluaGetColorIndex( L, 4 );
 
 	GuiDrawIcon( iconId, pos.x, pos.y, pixelSize, color );
-	lua_pushboolean( L, true );
 
-	return 1;
+	return 0;
 }
 
 /*
-> success = RL.GuiSetIconScale( int scale )
+> RL.GuiSetIconScale( int scale )
 
-Set icon scale ( 1 by default )
-
-- Failure return false
-- Success return true
+Set icon scale (1 by default)
 */
 int lguiGuiSetIconScale( lua_State *L ) {
-	if ( !lua_isnumber( L, 1 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiSetIconScale( int scale )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
-	unsigned int scale = lua_tointeger( L, 1 );
+	unsigned int scale = luaL_checkinteger( L, 1 );
 
 	GuiSetIconScale( scale );
-	lua_pushboolean( L, true );
 
-	return 1;
+	return 0;
 }
 
 /*
-> success = RL.GuiSetIconPixel( int iconId, Vector2 pos )
+> RL.GuiSetIconPixel( int iconId, Vector2 pos )
 
 Set icon pixel value
-
-- Failure return false
-- Success return true
 */
 int lguiGuiSetIconPixel( lua_State *L ) {
-	if ( !lua_isnumber( L, 1 ) || !lua_istable( L, 2 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiSetIconPixel( int iconId, Vector2 pos )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
-	int iconId = lua_tointeger( L, 1 );
+	int iconId = luaL_checkinteger( L, 1 );
 	Vector2 pos = uluaGetVector2Index( L, 2 );
 
 	GuiSetIconPixel( iconId, pos.x, pos.y );
-	lua_pushboolean( L, true );
 
-	return 1;
+	return 0;
 }
 
 /*
-> success = RL.GuiClearIconPixel( int iconId, Vector2 pos )
+> RL.GuiClearIconPixel( int iconId, Vector2 pos )
 
 Clear icon pixel value
-
-- Failure return false
-- Success return true
 */
 int lguiGuiClearIconPixel( lua_State *L ) {
-	if ( !lua_isnumber( L, 1 ) || !lua_istable( L, 2 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiClearIconPixel( int iconId, Vector2 pos )" );
-		lua_pushboolean( L, false );
-		return 1;
-	}
-	int iconId = lua_tointeger( L, 1 );
+	int iconId = luaL_checkinteger( L, 1 );
 	Vector2 pos = uluaGetVector2Index( L, 2 );
 
 	GuiClearIconPixel( iconId, pos.x, pos.y );
-	lua_pushboolean( L, true );
 
-	return 1;
+	return 0;
 }
 
 /*
@@ -1134,16 +835,10 @@ int lguiGuiClearIconPixel( lua_State *L ) {
 
 Check icon pixel value
 
-- Failure return nil
 - Success return bool
 */
 int lguiGuiCheckIconPixel( lua_State *L ) {
-	if ( !lua_isnumber( L, 1 ) || !lua_istable( L, 2 ) ) {
-		TraceLog( state->logLevelInvalid, "%s", "Bad call of function. RL.GuiCheckIconPixel( int iconId, Vector2 pos )" );
-		lua_pushnil( L );
-		return 1;
-	}
-	int iconId = lua_tointeger( L, 1 );
+	int iconId = luaL_checkinteger( L, 1 );
 	Vector2 pos = uluaGetVector2Index( L, 2 );
 
 	lua_pushboolean( L, GuiCheckIconPixel( iconId, pos.x, pos.y ) );