Extending utils

src/raylib.h

@@ -179,12 +179,14 @@
 #define ORANGE     CLITERAL(Color){ 255, 161, 0, 255 }     // Orange
 #define PINK       CLITERAL(Color){ 255, 109, 194, 255 }   // Pink
 #define RED        CLITERAL(Color){ 230, 41, 55, 255 }     // Red
+#define STRONGRED  CLITERAL(Color){ 255, 0, 0, 255}        // Strong Red
 #define MAROON     CLITERAL(Color){ 190, 33, 55, 255 }     // Maroon
 #define GREEN      CLITERAL(Color){ 0, 228, 48, 255 }      // Green
 #define LIME       CLITERAL(Color){ 0, 158, 47, 255 }      // Lime
 #define DARKGREEN  CLITERAL(Color){ 0, 117, 44, 255 }      // Dark Green
 #define SKYBLUE    CLITERAL(Color){ 102, 191, 255, 255 }   // Sky Blue
 #define BLUE       CLITERAL(Color){ 0, 121, 241, 255 }     // Blue
+#define CYAN       CLITERAL(Color){ 0, 255, 255, 255 }     // Cyan
 #define DARKBLUE   CLITERAL(Color){ 0, 82, 172, 255 }      // Dark Blue
 #define PURPLE     CLITERAL(Color){ 200, 122, 255, 255 }   // Purple
 #define VIOLET     CLITERAL(Color){ 135, 60, 190, 255 }    // Violet
@@ -1000,6 +1002,7 @@ RLAPI void SetWindowFocused(void);                                // Set window
 RLAPI void *GetWindowHandle(void);                                // Get native window handle
 RLAPI int GetScreenWidth(void);                                   // Get current screen width
 RLAPI int GetScreenHeight(void);                                  // Get current screen height
+RLAPI Vector2 GetScreenCenter(void);                              // Get the center of the current screen
 RLAPI int GetRenderWidth(void);                                   // Get current render width (it considers HiDPI)
 RLAPI int GetRenderHeight(void);                                  // Get current render height (it considers HiDPI)
 RLAPI int GetMonitorCount(void);                                  // Get number of connected monitors
@@ -1042,6 +1045,8 @@ RLAPI void EndShaderMode(void);                                   // End custom
 RLAPI void BeginBlendMode(int mode);                              // Begin blending mode (alpha, additive, multiplied, subtract, custom)
 RLAPI void EndBlendMode(void);                                    // End blending mode (reset to default: alpha blending)
 RLAPI void BeginScissorMode(int x, int y, int width, int height); // Begin scissor mode (define screen area for following drawing)
+RLAPI void BeginScissorModeV(Vector2 position, Vector2 size);     // Begin scissor mode (define screen area for following drawing with vectors)
+RLAPI void BeginScissorModeRec(Rectangle rec);                    // Begin scissor mode (define screen area for following drawing with a rectangle)
 RLAPI void EndScissorMode(void);                                  // End scissor mode
 RLAPI void BeginVrStereoMode(VrStereoConfig config);              // Begin stereo rendering (requires VR simulator)
 RLAPI void EndVrStereoMode(void);                                 // End stereo rendering (requires VR simulator)
@@ -1450,6 +1455,8 @@ RLAPI void DrawTextureNPatch(Texture2D texture, NPatchInfo nPatchInfo, Rectangle
 // Color/pixel related functions
 RLAPI bool ColorIsEqual(Color col1, Color col2);                            // Check if two colors are equal
 RLAPI Color Fade(Color color, float alpha);                                 // Get color with alpha applied, alpha goes from 0.0f to 1.0f
+RLAPI Rectangle ExpandRectangle(Rectangle rec, float expand);               // Expand a rectangle uniformly
+RLAPI Rectangle ShrinkRectangle(Rectangle rec, float shrink);               // Shrink a rectangle uniformly
 RLAPI int ColorToInt(Color color);                                          // Get hexadecimal value for a Color (0xRRGGBBAA)
 RLAPI Vector4 ColorNormalize(Color color);                                  // Get Color normalized as float [0..1]
 RLAPI Color ColorFromNormalized(Vector4 normalized);                        // Get Color from normalized values [0..1]

src/rcore.c

@@ -819,6 +819,17 @@ int GetScreenHeight(void)
     return CORE.Window.screen.height;
 }
 
+// Get the center of the current screen
+Vector2 GetScreenCenter(void)
+{
+    Vector2 center = (Vector2)
+    {
+        GetScreenWidth() / 2.0f,
+        GetScreenHeight() / 2.0f
+    };
+    return center;
+}
+
 // Get current render width which is equal to screen width*dpi scale
 int GetRenderWidth(void)
 {
@@ -1126,6 +1137,16 @@ void BeginScissorMode(int x, int y, int width, int height)
     }
 }
 
+void BeginScissorModeV(Vector2 position, Vector2 size)
+{
+    BeginScissorMode((int)position.x, (int)position.y, (int)size.x, (int)size.y);
+}
+
+void BeginScissorModeRec(Rectangle rec)
+{
+    BeginScissorMode((int)rec.x, (int)rec.y, (int)rec.width, (int)rec.height);
+}
+
 // End scissor mode
 void EndScissorMode(void)
 {

src/rtextures.c

@@ -4859,6 +4859,26 @@ Color Fade(Color color, float alpha)
     return result;
 }
 
+// Expand a rectangle uniformly
+Rectangle ExpandRectangle(Rectangle rec, float expand)
+{
+    rec.x -= expand / 2.0f;
+    rec.y -= expand / 2.0f;
+    rec.width += expand;
+    rec.height += expand;
+    return rec;
+}
+
+// Shrink a rectangle uniformly
+Rectangle ShrinkRectangle(Rectangle rec, float shrink)
+{
+    rec.x += shrink / 2.0f;
+    rec.y += shrink / 2.0f;
+    rec.width -= shrink;
+    rec.height -= shrink;
+    return rec;
+}
+
 // Get hexadecimal value for a Color
 int ColorToInt(Color color)
 {