Merge branch 'master' of https://github.com/raysan5/raylib

* [rshapes] Update `DrawRectangleLinesEx()`

Add support for negative `thick` values. When `thick` is negative, lines are drawn growing outside of the rectangle.

* [rshapes] Update `DrawPolyLinesEx()`

Add support for negative `thick` values. When `thick` is negative, lines are drawn growing outside of the polygon. Also refactored to explicitly use an `outerRadius` variable instead of using `radius` as the outer radius.

* [rshapes] Update `DrawRectangleRoundedLinesEx()`

Make the outline vertices easier to work with.

* [rshapes] Updated `DrawRectangleRoundedLinesEx()`.

Lines used to draw outside when `thick` was positive. Added support for negative `thick` values. When `thick` is negative, lines are drawn growing outside of the rectangle.

* [rshapes] Update `DrawRectangleRoundedLines()`.

Make the formatting of the points' x and y coordinates in DrawRectangleRoundedLines() match DrawRectangleRoundedLinesEx().

src/external/rlsw.h

@@ -774,7 +774,7 @@ SWAPI void swGetFramebufferAttachmentParameteriv(SWattachment attachment, SWatta
 // Simple log system to avoid printf() calls if required
 // NOTE: Avoiding those calls, also avoids const strings memory usage
 #define RLSW_SUPPORT_LOG_INFO
-#if defined(RLSW_SUPPORT_LOG_INFO) //&& defined(_DEBUG)      // WARNING: LOG() output required for this tool
+#if defined(RLSW_SUPPORT_LOG_INFO)
     #include <stdio.h>
     #define SW_LOG(...) printf(__VA_ARGS__)
 #else

src/platforms/rcore_android.c

@@ -757,12 +757,12 @@ void PollInputEvents(void)
     for (int i = 0; i < MAX_KEYBOARD_KEYS; i++) CORE.Input.Keyboard.keyRepeatInFrame[i] = 0;
 
     // Reset last gamepad button/axis registered state
-    CORE.Input.Gamepad.lastButtonPressed = 0;       // GAMEPAD_BUTTON_UNKNOWN
+    CORE.Input.Gamepad.lastButtonPressed = 0; // GAMEPAD_BUTTON_UNKNOWN
     //CORE.Input.Gamepad.axisCount = 0;
 
     for (int i = 0; i < MAX_GAMEPADS; i++)
     {
-        if (CORE.Input.Gamepad.ready[i])     // Check if gamepad is available
+        if (CORE.Input.Gamepad.ready[i]) // Check if gamepad is available
         {
             // Register previous gamepad states
             for (int k = 0; k < MAX_GAMEPAD_BUTTONS; k++)

src/platforms/rcore_desktop_rgfw.c

@@ -1613,11 +1613,11 @@ void PollInputEvents(void)
     }
 
     //-----------------------------------------------------------------------------
-    // using RGFW callbacks instead of polling
+    // Using RGFW callbacks instead of polling
     RGFW_pollEvents();
     //-----------------------------------------------------------------------------
 
-    mg_event gamepad_event;
+    mg_event gamepad_event = { 0 };
     while (mg_gamepads_check_event(&platform.minigamepad, &gamepad_event))
     {
         int gamepadIndex = gamepad_event.gamepad->index;

src/platforms/rcore_desktop_sdl.c

@@ -1652,7 +1652,7 @@ void PollInputEvents(void)
             } break;
             #endif
 
-            // Keyboard events
+            // Check keyboard events
             case SDL_KEYDOWN:
             {
             #if defined(USING_VERSION_SDL3)
@@ -1680,10 +1680,8 @@ void PollInputEvents(void)
                 if (CORE.Input.Keyboard.currentKeyState[CORE.Input.Keyboard.exitKey]) CORE.Window.shouldClose = true;
 
             } break;
-
             case SDL_KEYUP:
             {
-
             #if defined(USING_VERSION_SDL3)
                 KeyboardKey key = ConvertScancodeToKey(event.key.scancode);
             #else
@@ -1691,7 +1689,6 @@ void PollInputEvents(void)
             #endif
                 if (key != KEY_NULL) CORE.Input.Keyboard.currentKeyState[key] = 0;
             } break;
-
             case SDL_TEXTINPUT:
             {
                 // NOTE: event.text.text data comes an UTF-8 text sequence but register codepoints (int)
@@ -1700,7 +1697,6 @@ void PollInputEvents(void)
                 if (CORE.Input.Keyboard.charPressedQueueCount < MAX_CHAR_PRESSED_QUEUE)
                 {
                     // Add character (codepoint) to the queue
-
                 #if defined(USING_VERSION_SDL3)
                     size_t textLen = strlen(event.text.text);
                     unsigned int codepoint = (unsigned int)SDL_StepUTF8(&event.text.text, &textLen);
@@ -1769,6 +1765,7 @@ void PollInputEvents(void)
                 touchAction = 2;
             } break;
 
+            // Check Touch events
             case SDL_FINGERDOWN:
             {
                 UpdateTouchPointsSDL(event.tfinger);
@@ -1788,24 +1785,21 @@ void PollInputEvents(void)
                 realTouch = true;
             } break;
 
-            // Check gamepad events
+            // Check Gamepad events
             case SDL_JOYDEVICEADDED:
             {
                 int jid = event.jdevice.which; // Joystick device index
 
-                // check if already added at InitPlatform
+                // Check if already added at InitPlatform
                 for (int i = 0; i < MAX_GAMEPADS; i++)
                 {
-                    if (jid == platform.gamepadId[i])
+                    if (jid == platform.gamepadId[i]) return;
-                    {
-                        return;
-                    }
                 }
 
                 int nextAvailableSlot = 0;
                 while (nextAvailableSlot < MAX_GAMEPADS && CORE.Input.Gamepad.ready[nextAvailableSlot])
                 {
-                    ++nextAvailableSlot;
+                    nextAvailableSlot++;
                 }
 
                 if ((nextAvailableSlot < MAX_GAMEPADS) && !CORE.Input.Gamepad.ready[nextAvailableSlot])

src/platforms/rcore_drm.c

@@ -1071,7 +1071,7 @@ void PollInputEvents(void)
     CORE.Input.Keyboard.charPressedQueueCount = 0;
 
     // Reset last gamepad button/axis registered state
-    CORE.Input.Gamepad.lastButtonPressed = 0;       // GAMEPAD_BUTTON_UNKNOWN
+    CORE.Input.Gamepad.lastButtonPressed = 0; // GAMEPAD_BUTTON_UNKNOWN
     //CORE.Input.Gamepad.axisCount = 0;
 
     // Register previous keys states
@@ -1118,7 +1118,7 @@ void PollInputEvents(void)
     // NOTE: For DRM touchscreen devices, this mapping is disabled to avoid false touch detection
     // CORE.Input.Touch.position[0] = CORE.Input.Mouse.currentPosition;
 
-    // Handle the mouse/touch/gestures events:
+    // Handle the mouse/touch/gestures events
     PollMouseEvents();
 }
 
@@ -1821,7 +1821,7 @@ static void ProcessKeyboard(void)
             if (bufferByteCount == 1) CORE.Input.Keyboard.currentKeyState[CORE.Input.Keyboard.exitKey] = 1;
             else
             {
-                if (keysBuffer[i + 1] == 0x5b)    // Special function key
+                if (keysBuffer[i + 1] == 0x5b) // Special function key
                 {
                     if ((keysBuffer[i + 2] == 0x5b) || (keysBuffer[i + 2] == 0x31) || (keysBuffer[i + 2] == 0x32))
                     {
@@ -1938,7 +1938,8 @@ static void InitEvdevInput(void)
                 (strncmp("mouse", entity->d_name, strlen("mouse")) == 0))       // Search for devices named "mouse*"
             {
                 snprintf(path, MAX_FILEPATH_LENGTH, "%s%s", DEFAULT_EVDEV_PATH, entity->d_name);
-                ConfigureEvdevDevice(path);                                     // Configure the device if appropriate
+                
+                ConfigureEvdevDevice(path); // Configure the device if appropriate
             }
         }
 

src/platforms/rcore_memory.c

@@ -477,7 +477,7 @@ void PollInputEvents(void)
     if (kbhit())
     {
         int key = getch();
-        if (key == 27) CORE.Window.shouldClose = true; // KEY_SCAPE
+        if (key == 27) CORE.Window.shouldClose = true; // KEY_ESCAPE
     }
 }
 

src/platforms/rcore_web.c

@@ -1086,7 +1086,7 @@ void PollInputEvents(void)
     CORE.Input.Keyboard.charPressedQueueCount = 0;
 
     // Reset last gamepad button/axis registered state
-    CORE.Input.Gamepad.lastButtonPressed = 0;       // GAMEPAD_BUTTON_UNKNOWN
+    CORE.Input.Gamepad.lastButtonPressed = 0; // GAMEPAD_BUTTON_UNKNOWN
     //CORE.Input.Gamepad.axisCount = 0;
 
     // Keyboard/Mouse input polling (automatically managed by GLFW3 through callback)
@@ -1128,7 +1128,7 @@ void PollInputEvents(void)
         // Register previous gamepad button states
         for (int k = 0; k < MAX_GAMEPAD_BUTTONS; k++) CORE.Input.Gamepad.previousButtonState[i][k] = CORE.Input.Gamepad.currentButtonState[i][k];
 
-        EmscriptenGamepadEvent gamepadState;
+        EmscriptenGamepadEvent gamepadState = { 0 };
 
         int result = emscripten_get_gamepad_status(i, &gamepadState);
 
@@ -1161,7 +1161,7 @@ void PollInputEvents(void)
                     default: break;
                 }
 
-                if (button + 1 != 0)   // Check for valid button
+                if (button + 1 != 0) // Check for valid button
                 {
                     if (gamepadState.digitalButton[j] == 1)
                     {

src/platforms/rcore_web_emscripten.c

@@ -1063,7 +1063,7 @@ void PollInputEvents(void)
     CORE.Input.Keyboard.charPressedQueueCount = 0;
 
     // Reset last gamepad button/axis registered state
-    CORE.Input.Gamepad.lastButtonPressed = 0;       // GAMEPAD_BUTTON_UNKNOWN
+    CORE.Input.Gamepad.lastButtonPressed = 0; // GAMEPAD_BUTTON_UNKNOWN
     //CORE.Input.Gamepad.axisCount = 0;
 
     // Keyboard/Mouse input polling (automatically managed by GLFW3 through callback)
@@ -1134,7 +1134,7 @@ void PollInputEvents(void)
                     default: break;
                 }
 
-                if (button + 1 != 0)   // Check for valid button
+                if (button + 1 != 0) // Check for valid button
                 {
                     if (gamepadState.digitalButton[j] == 1)
                     {

src/raudio.c

@@ -2660,7 +2660,7 @@ static void MixAudioFrames(float *framesOut, const float *framesIn, ma_uint32 fr
     const float localVolume = buffer->volume;
     const ma_uint32 channels = AUDIO.System.device.playback.channels;
 
-    if (channels == 2)  // Consider panning
+    if (channels == 2) // Consider panning
     {
         const float right = (buffer->pan + 1.0f)/2.0f; // Normalize: [-1..1] -> [0..1]
         const float left = 1.0f - right;

src/rgestures.h

@@ -353,7 +353,7 @@ void ProcessGestureEvent(GestureEvent event)
             GESTURES.Drag.vector.y = GESTURES.Touch.moveDownPositionA.y - GESTURES.Touch.downDragPosition.y;
         }
     }
-    else if (GESTURES.Touch.pointCount == 2)    // Two touch points
+    else if (GESTURES.Touch.pointCount == 2)
     {
         if (event.touchAction == TOUCH_ACTION_DOWN)
         {

src/rlgl.h

@@ -2377,7 +2377,7 @@ void rlglClose(void)
 // NOTE: External loader function must be provided
 void rlLoadExtensions(void *loader)
 {
-#if defined(GRAPHICS_API_OPENGL_33)     // Also defined for GRAPHICS_API_OPENGL_21
+#if defined(GRAPHICS_API_OPENGL_33) // Also defined for GRAPHICS_API_OPENGL_21
     // NOTE: glad is generated and contains only required OpenGL 3.3 Core extensions (and lower versions)
     if (gladLoadGL((GLADloadfunc)loader) == 0) TRACELOG(RL_LOG_WARNING, "GLAD: Cannot load OpenGL extensions");
     else TRACELOG(RL_LOG_INFO, "GLAD: OpenGL extensions loaded successfully");
@@ -2508,7 +2508,7 @@ void rlLoadExtensions(void *loader)
         }
 
         // Check instanced rendering support
-        if (strstr(extList[i], (const char *)"instanced_arrays") != NULL)   // Broad check for instanced_arrays
+        if (strstr(extList[i], (const char *)"instanced_arrays") != NULL) // Broad check for instanced_arrays
         {
             // Specific check
             if (strcmp(extList[i], (const char *)"GL_ANGLE_instanced_arrays") == 0)      // ANGLE

src/rmodels.c

@@ -5348,7 +5348,7 @@ static Image LoadImageFromCgltfImage(cgltf_image *cgltfImage, const char *texPat
             image = LoadImage(TextFormat("%s/%s", texPath, cgltfImage->uri));
         }
     }
-    else if ((cgltfImage->buffer_view != NULL) && (cgltfImage->buffer_view->buffer->data != NULL))    // Check if image is provided as data buffer
+    else if ((cgltfImage->buffer_view != NULL) && (cgltfImage->buffer_view->buffer->data != NULL)) // Check if image is provided as data buffer
     {
         unsigned char *data = (unsigned char *)RL_MALLOC(cgltfImage->buffer_view->size);
         int offset = (int)cgltfImage->buffer_view->offset;
@@ -5776,7 +5776,7 @@ static Model LoadGLTF(const char *fileName)
                             else TRACELOG(LOG_WARNING, "MODEL: [%s] Vertices attribute data format not supported, use vec3 float", fileName);
                         }
                     }
-                    else if (mesh->primitives[p].attributes[j].type == cgltf_attribute_type_normal)   // NORMAL, vec3, float
+                    else if (mesh->primitives[p].attributes[j].type == cgltf_attribute_type_normal) // NORMAL, vec3, float
                     {
                         cgltf_accessor *attribute = mesh->primitives[p].attributes[j].data;
 
@@ -5876,7 +5876,7 @@ static Model LoadGLTF(const char *fileName)
                             else TRACELOG(LOG_WARNING, "MODEL: [%s] Normals attribute data format not supported, use vec3 float", fileName);
                         }
                     }
-                    else if (mesh->primitives[p].attributes[j].type == cgltf_attribute_type_tangent)   // TANGENT, vec4, float, w is tangent basis sign
+                    else if (mesh->primitives[p].attributes[j].type == cgltf_attribute_type_tangent) // TANGENT, vec4, float, w is tangent basis sign
                     {
                         cgltf_accessor *attribute = mesh->primitives[p].attributes[j].data;
 
@@ -5913,7 +5913,7 @@ static Model LoadGLTF(const char *fileName)
 
                         if (attribute->type == cgltf_type_vec2)
                         {
-                            if (attribute->component_type == cgltf_component_type_r_32f)  // vec2, float
+                            if (attribute->component_type == cgltf_component_type_r_32f) // vec2, float
                             {
                                 // Init raylib mesh texcoords to copy glTF attribute data
                                 texcoordPtr = (float *)RL_MALLOC(attribute->count*2*sizeof(float));
@@ -5962,7 +5962,7 @@ static Model LoadGLTF(const char *fileName)
                             if (texcoordPtr != NULL) RL_FREE(texcoordPtr);
                         }
                     }
-                    else if (mesh->primitives[p].attributes[j].type == cgltf_attribute_type_color)    // COLOR_n, vec3/vec4, float/u8n/u16n
+                    else if (mesh->primitives[p].attributes[j].type == cgltf_attribute_type_color) // COLOR_n, vec3/vec4, float/u8n/u16n
                     {
                         cgltf_accessor *attribute = mesh->primitives[p].attributes[j].data;
 
@@ -5971,7 +5971,7 @@ static Model LoadGLTF(const char *fileName)
                         if (model.meshes[meshIndex].colors != NULL) TRACELOG(LOG_WARNING, "MODEL: [%s] Colors attribute data already loaded", fileName);
                         else
                         {
-                            if (attribute->type == cgltf_type_vec3)  // RGB
+                            if (attribute->type == cgltf_type_vec3) // RGB
                             {
                                 if (attribute->component_type == cgltf_component_type_r_8u)
                                 {
@@ -6264,7 +6264,7 @@ static Model LoadGLTF(const char *fileName)
                         }
                         else TRACELOG(LOG_WARNING, "MODEL: [%s] Joint attribute data format not supported", fileName);
                     }
-                    else if (mesh->primitives[p].attributes[j].type == cgltf_attribute_type_weights)  // WEIGHTS_n (vec4, u8n/u16n/f32)
+                    else if (mesh->primitives[p].attributes[j].type == cgltf_attribute_type_weights) // WEIGHTS_n (vec4, u8n/u16n/f32)
                     {
                         cgltf_accessor *attribute = mesh->primitives[p].attributes[j].data;
 

src/rshapes.c

@@ -637,24 +637,53 @@ void DrawRectangleLinesEx(Rectangle rec, float thick, Color color)
         else if (rec.width <= rec.height) thick = rec.width/2;
     }
 
-    // When rec = { x, y, 8.0f, 6.0f } and thick = 2, the following
-    // four rectangles are drawn ([T]op, [B]ottom, [L]eft, [R]ight):
-    //
-    //   TTTTTTTT
-    //   TTTTTTTT
-    //   LL    RR
-    //   LL    RR
-    //   BBBBBBBB
-    //   BBBBBBBB
-    //
-    
     if (thick > 0.0f)
     {
+        // When rec = { x, y, 8.0f, 6.0f } and thick = 2, the following
+        // four rectangles are drawn ([T]op, [B]ottom, [L]eft, [R]ight):
+        //
+        //   TTTTTTTT
+        //   TTTTTTTT
+        //   LL    RR
+        //   LL    RR
+        //   BBBBBBBB
+        //   BBBBBBBB
+        //
+
         Rectangle top = { rec.x, rec.y, rec.width, thick };
         Rectangle bottom = { rec.x, rec.y - thick + rec.height, rec.width, thick };
         Rectangle left = { rec.x, rec.y + thick, thick, rec.height - thick*2.0f };
         Rectangle right = { rec.x - thick + rec.width, rec.y + thick, thick, rec.height - thick*2.0f };
 
+        DrawRectangleRec(top, color);
+        DrawRectangleRec(bottom, color);
+        DrawRectangleRec(left, color);
+        DrawRectangleRec(right, color);
+    }
+    else
+    {
+        // When rec = { x, y, 8.0f, 6.0f } and thick = -2, the following
+        // four rectangles are drawn ([T]op, [B]ottom, [L]eft, [R]ight):
+        //
+        //   TTTTTTTTTTTT
+        //   TTTTTTTTTTTT
+        //   LL        RR
+        //   LL        RR
+        //   LL        RR
+        //   LL        RR
+        //   LL        RR
+        //   LL        RR
+        //   BBBBBBBBBBBB
+        //   BBBBBBBBBBBB
+        //
+
+        thick *= -1.0f;
+
+        Rectangle top = { rec.x - thick, rec.y - thick, rec.width + thick*2.0f, thick };
+        Rectangle bottom = { rec.x - thick, rec.y + rec.height, rec.width + thick*2.0f, thick};
+        Rectangle left = { rec.x - thick, rec.y, thick, rec.height };
+        Rectangle right = { rec.x + rec.width, rec.y, thick, rec.height };
+
         DrawRectangleRec(top, color);
         DrawRectangleRec(bottom, color);
         DrawRectangleRec(left, color);
@@ -931,22 +960,35 @@ void DrawRectangleRoundedLines(Rectangle rec, float roundness, int segments, Col
           \                        /
            P5 ------------------ P4
     */
+
+    // The x-coordinates used for the outline
+    const float x0 = rec.x + radius + 0.5f;
+    const float x1 = (rec.x + rec.width) - radius - 0.5f;
+    const float x2 = rec.x + rec.width - 0.5f;
+    const float x3 = rec.x + 0.5f;
+
+    // The y-coordinates used for the outline
+    const float y0 = rec.y + 0.5f;
+    const float y1 = rec.y + radius + 0.5f;
+    const float y2 = (rec.y + rec.height) - radius - 0.5f;
+    const float y3 = rec.y + rec.height - 0.5f;
+
     const Vector2 point[8] = {
-        {(float)rec.x + radius + 0.5f, rec.y + 0.5f},
+        {x0, y0}, // P0
-        {(float)(rec.x + rec.width) - radius - 0.5f, rec.y + 0.5f},
+        {x1, y0}, // P1
-        {rec.x + rec.width - 0.5f, (float)rec.y + radius + 0.5f}, // PO, P1, P2
+        {x2, y1}, // P2
-        {rec.x + rec.width - 0.5f, (float)(rec.y + rec.height) - radius - 0.5f},
+        {x2, y2}, // P3
-        {(float)(rec.x + rec.width) - radius - 0.5f, rec.y + rec.height - 0.5f}, // P3, P4
+        {x1, y3}, // P4
-        {(float)rec.x + radius + 0.5f, rec.y + rec.height - 0.5f},
+        {x0, y3}, // P5
-        {rec.x + 0.5f, (float)(rec.y + rec.height) - radius - 0.5f},
+        {x3, y2}, // P6
-        {rec.x + 0.5f, (float)rec.y + radius + 0.5f}, // P5, P6, P7
+        {x3, y1}, // P7
     };
 
     const Vector2 centers[4] = {
-        {(float)rec.x + radius + 0.5f, (float)rec.y + radius + 0.5f},
+        {x0, y1}, // P16
-        {(float)(rec.x + rec.width) - radius - 0.5f, (float)rec.y + radius + 0.5f}, // P16, P17
+        {x1, y1}, // P17
-        {(float)(rec.x + rec.width) - radius - 0.5f, (float)(rec.y + rec.height) - radius - 0.5f},
+        {x1, y2}, // P18
-        {(float)rec.x + radius + 0.5f, (float)(rec.y + rec.height) - radius - 0.5f} // P18, P19
+        {x0, y2}  // P19
     };
 
     const float angles[4] = { 180.0f, 270.0f, 0.0f, 90.0f };
@@ -980,32 +1022,81 @@ void DrawRectangleRoundedLines(Rectangle rec, float roundness, int segments, Col
 // Draw rectangle with rounded edges outline with line thickness
 void DrawRectangleRoundedLinesEx(Rectangle rec, float roundness, int segments, float thick, Color color)
 {
-    if (thick <= 0) return;
-
     // Not a rounded rectangle
     if (roundness <= 0.0f)
     {
-        DrawRectangleLinesEx((Rectangle){rec.x - thick, rec.y - thick, rec.width + 2*thick, rec.height + 2*thick}, thick, color);
+        DrawRectangleLinesEx(rec, thick, color);
         return;
     }
 
     if (roundness >= 1.0f) roundness = 1.0f;
 
-    // Calculate corner radius
+    float radius = 0.0f;
-    float radius = (rec.width > rec.height)? (rec.height*roundness)/2 : (rec.width*roundness)/2;
+    float roundedOutlineThick = 0.0f;
-    if (radius <= 0.0f) return;
+    float outerRadius = 0.0f;
-
+    float innerRadius = 0.0f;
-    // Calculate number of segments to use for the corners
+    if (thick >= 0.0f)
-    if (segments < 4)
     {
-        // Calculate the maximum angle between segments based on the error rate (usually 0.5f)
+        // Calculate corner radius
-        float th = acosf(2*powf(1 - SMOOTH_CIRCLE_ERROR_RATE/radius, 2) - 1);
+        radius = (rec.width > rec.height)? (rec.height*roundness)/2 : (rec.width*roundness)/2;
-        segments = (int)ceilf((2*PI/th)/4.0f);
+        if (radius <= 0.0f) return;
-        if (segments <= 0) segments = 4;
+
+        outerRadius = radius;
+        innerRadius = outerRadius - thick;
+
+        // The maximum thickness the outline can have and still be rounded on the interior edge is equal to the corner radius
+        // Put another way, when `innerRadius <= 0`, the interior of the outline is just a normal rectangle with no rounding
+        if (innerRadius <= 0.0f)
+        {
+            innerRadius = 0.0f;
+            roundedOutlineThick = outerRadius;
+
+            // Draw the not-rounded portion of the outline
+            DrawRectangleLinesEx((Rectangle){ rec.x + outerRadius, rec.y + outerRadius, rec.width - outerRadius*2.0f, rec.height - outerRadius*2.0f }, thick - outerRadius, color);
+        }
+        else
+        {
+            roundedOutlineThick = thick;
+        }
+
+        // Calculate number of segments to use for the corners
+        if (segments < 4)
+        {
+            // Calculate the maximum angle between segments based on the error rate (usually 0.5f)
+            float th = acosf(2*powf(1 - SMOOTH_CIRCLE_ERROR_RATE/outerRadius, 2) - 1);
+            segments = (int)ceilf((2*PI/th)/4.0f);
+            if (segments <= 0) segments = 4;
+        }
+    }
+    else
+    {
+        thick *= -1.0f;
+
+        // Calculate corner radius
+        radius = (rec.width > rec.height)? (rec.height*roundness)/2 : (rec.width*roundness)/2;
+        if (radius <= 0.0f) return; // Only possible if the rectangle has 0 width or height
+
+        // Expand the rectangle
+        rec.x -= thick;
+        rec.y -= thick;
+        rec.width += thick*2.0f;
+        rec.height += thick*2.0f;
+
+        innerRadius = radius;
+        outerRadius = innerRadius + thick;
+        roundedOutlineThick = thick;
+
+        // Calculate number of segments to use for the corners
+        if (segments < 4)
+        {
+            // Calculate the maximum angle between segments based on the error rate (usually 0.5f)
+            float th = acosf(2*powf(1 - SMOOTH_CIRCLE_ERROR_RATE/innerRadius, 2) - 1);
+            segments = (int)ceilf((2*PI/th)/4.0f);
+            if (segments <= 0) segments = 4;
+        }
     }
 
     float stepLength = 90.0f/(float)segments;
-    const float outerRadius = radius + thick, innerRadius = radius;
 
     /*
     Quick sketch to make sense of all of this,
@@ -1023,30 +1114,47 @@ void DrawRectangleRoundedLinesEx(Rectangle rec, float roundness, int segments, f
           \\ P13              P12 //
            P5 ================== P4
     */
+
+    // The x-coordinates used for the outline
+    const float x0 = rec.x + outerRadius;
+    const float x1 = (rec.x + rec.width) - outerRadius;
+    const float x2 = rec.x + rec.width;
+    const float x3 = rec.x;
+    const float x4 = rec.x + rec.width - roundedOutlineThick;
+    const float x5 = rec.x + roundedOutlineThick;
+
+    // The y-coordinates used for the outline
+    const float y0 = rec.y;
+    const float y1 = rec.y + outerRadius;
+    const float y2 = (rec.y + rec.height) - outerRadius;
+    const float y3 = rec.y + rec.height;
+    const float y4 = rec.y + roundedOutlineThick;
+    const float y5 = rec.y + rec.height - roundedOutlineThick;
+
     const Vector2 point[16] = {
-        {(float)rec.x + innerRadius + 0.5f, rec.y - thick + 0.5f},
+        {x0, y0}, // P0
-        {(float)(rec.x + rec.width) - innerRadius - 0.5f, rec.y - thick + 0.5f},
+        {x1, y0}, // P1
-        {rec.x + rec.width + thick - 0.5f, (float)rec.y + innerRadius + 0.5f}, // PO, P1, P2
+        {x2, y1}, // P2
-        {rec.x + rec.width + thick - 0.5f, (float)(rec.y + rec.height) - innerRadius - 0.5f},
+        {x2, y2}, // P3
-        {(float)(rec.x + rec.width) - innerRadius - 0.5f, rec.y + rec.height + thick - 0.5f}, // P3, P4
+        {x1, y3}, // P4
-        {(float)rec.x + innerRadius + 0.5f, rec.y + rec.height + thick - 0.5f},
+        {x0, y3}, // P5
-        {rec.x - thick + 0.5f, (float)(rec.y + rec.height) - innerRadius - 0.5f},
+        {x3, y2}, // P6
-        {rec.x - thick + 0.5f, (float)rec.y + innerRadius + 0.5f}, // P5, P6, P7
+        {x3, y1}, // P7
-        {(float)rec.x + innerRadius + 0.5f, rec.y + 0.5f},
+        {x0, y4}, // P8
-        {(float)(rec.x + rec.width) - innerRadius - 0.5f, rec.y + 0.5f}, // P8, P9
+        {x1, y4}, // P9
-        {rec.x + rec.width - 0.5f, (float)rec.y + innerRadius + 0.5f},
+        {x4, y1}, // P10
-        {rec.x + rec.width - 0.5f, (float)(rec.y + rec.height) - innerRadius - 0.5f}, // P10, P11
+        {x4, y2}, // P11
-        {(float)(rec.x + rec.width) - innerRadius - 0.5f, rec.y + rec.height - 0.5f},
+        {x1, y5}, // P12
-        {(float)rec.x + innerRadius + 0.5f, rec.y + rec.height - 0.5f}, // P12, P13
+        {x0, y5}, // P13
-        {rec.x + 0.5f, (float)(rec.y + rec.height) - innerRadius - 0.5f},
+        {x5, y2}, // P14
-        {rec.x + 0.5f, (float)rec.y + innerRadius + 0.5f} // P14, P15
+        {x5, y1}  // P15
     };
 
     const Vector2 centers[4] = {
-        {(float)rec.x + innerRadius + 0.5f, (float)rec.y + innerRadius + 0.5f},
+        {x0, y1}, // P16
-        {(float)(rec.x + rec.width) - innerRadius - 0.5f, (float)rec.y + innerRadius + 0.5f}, // P16, P17
+        {x1, y1}, // P17
-        {(float)(rec.x + rec.width) - innerRadius - 0.5f, (float)(rec.y + rec.height) - innerRadius - 0.5f},
+        {x1, y2}, // P18
-        {(float)rec.x + innerRadius + 0.5f, (float)(rec.y + rec.height) - innerRadius - 0.5f} // P18, P19
+        {x0, y2}  // P19
     };
 
     const float angles[4] = { 180.0f, 270.0f, 0.0f, 90.0f };
@@ -1263,13 +1371,24 @@ void DrawPolyLines(Vector2 center, int sides, float radius, float rotation, Colo
 
 void DrawPolyLinesEx(Vector2 center, int sides, float radius, float rotation, float thick, Color color)
 {
-    if (thick <= 0.0f) return;
-
     if (sides < 3) sides = 3;
     float centralAngle = rotation*DEG2RAD;
     float exteriorAngle = 360.0f/(float)sides*DEG2RAD;
     float apothem = radius*cosf(DEG2RAD*180.0f/(float)sides);
-    float innerRadius = fmaxf(0.0f, radius - thick*(radius/apothem));
+
+    float outerRadius = 0.0f;
+    float innerRadius = 0.0f;
+    if (thick >= 0.0f)
+    {
+        outerRadius = radius;
+        innerRadius = fmaxf(0.0f, radius - thick*(radius/apothem));
+    }
+    else
+    {
+        thick *= -1.0f;
+        outerRadius = radius + thick*(radius/apothem);
+        innerRadius = radius;
+    }
 
 #if SUPPORT_QUADS_DRAW_MODE
     rlSetTexture(GetShapesTexture().id);
@@ -1282,7 +1401,7 @@ void DrawPolyLinesEx(Vector2 center, int sides, float radius, float rotation, fl
             float nextAngle = centralAngle + exteriorAngle;
 
             rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
-            rlVertex2f(center.x + cosf(centralAngle)*radius, center.y + sinf(centralAngle)*radius);
+            rlVertex2f(center.x + cosf(centralAngle)*outerRadius, center.y + sinf(centralAngle)*outerRadius);
 
             rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
             rlVertex2f(center.x + cosf(centralAngle)*innerRadius, center.y + sinf(centralAngle)*innerRadius);
@@ -1291,7 +1410,7 @@ void DrawPolyLinesEx(Vector2 center, int sides, float radius, float rotation, fl
             rlVertex2f(center.x + cosf(nextAngle)*innerRadius, center.y + sinf(nextAngle)*innerRadius);
 
             rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
-            rlVertex2f(center.x + cosf(nextAngle)*radius, center.y + sinf(nextAngle)*radius);
+            rlVertex2f(center.x + cosf(nextAngle)*outerRadius, center.y + sinf(nextAngle)*outerRadius);
 
             centralAngle = nextAngle;
         }
@@ -1304,13 +1423,13 @@ void DrawPolyLinesEx(Vector2 center, int sides, float radius, float rotation, fl
             rlColor4ub(color.r, color.g, color.b, color.a);
             float nextAngle = centralAngle + exteriorAngle;
 
-            rlVertex2f(center.x + cosf(nextAngle)*radius, center.y + sinf(nextAngle)*radius);
+            rlVertex2f(center.x + cosf(nextAngle)*outerRadius, center.y + sinf(nextAngle)*outerRadius);
-            rlVertex2f(center.x + cosf(centralAngle)*radius, center.y + sinf(centralAngle)*radius);
+            rlVertex2f(center.x + cosf(centralAngle)*outerRadius, center.y + sinf(centralAngle)*outerRadius);
             rlVertex2f(center.x + cosf(centralAngle)*innerRadius, center.y + sinf(centralAngle)*innerRadius);
 
             rlVertex2f(center.x + cosf(centralAngle)*innerRadius, center.y + sinf(centralAngle)*innerRadius);
             rlVertex2f(center.x + cosf(nextAngle)*innerRadius, center.y + sinf(nextAngle)*innerRadius);
-            rlVertex2f(center.x + cosf(nextAngle)*radius, center.y + sinf(nextAngle)*radius);
+            rlVertex2f(center.x + cosf(nextAngle)*outerRadius, center.y + sinf(nextAngle)*outerRadius);
 
             centralAngle = nextAngle;
         }

src/rtext.c

@@ -713,7 +713,7 @@ GlyphInfo *LoadFontData(const unsigned char *fileData, int dataSize, int fontSiz
                         default: break;
                     }
 
-                    if (glyphs[k].image.data != NULL)    // Glyph data has been found in the font
+                    if (glyphs[k].image.data != NULL) // Glyph data has been found in the font
                     {
                         stbtt_GetCodepointHMetrics(&fontInfo, cp, &glyphs[k].advanceX, NULL);
                         glyphs[k].advanceX = (int)((float)glyphs[k].advanceX*scaleFactor);
@@ -845,7 +845,7 @@ Image GenImageFontAtlas(const GlyphInfo *glyphs, Rectangle **glyphRecs, int glyp
     // DEBUG: View padding in the generated image setting a gray background...
     //for (int i = 0; i < atlas.width*atlas.height; i++) ((unsigned char *)atlas.data)[i] = 100;
 
-    if (packMethod == 0)   // Use basic packing algorithm
+    if (packMethod == 0) // Use basic packing algorithm
     {
         int offsetX = padding;
         int offsetY = padding;
@@ -907,7 +907,7 @@ Image GenImageFontAtlas(const GlyphInfo *glyphs, Rectangle **glyphRecs, int glyp
             offsetX += (glyphs[i].image.width + 2*padding);
         }
     }
-    else if (packMethod == 1)  // Use Skyline rect packing algorithm (stb_pack_rect)
+    else if (packMethod == 1) // Use Skyline rect packing algorithm (stb_pack_rect)
     {
         stbrp_context *context = (stbrp_context *)RL_MALLOC(sizeof(*context));
         stbrp_node *nodes = (stbrp_node *)RL_MALLOC(glyphCount*sizeof(*nodes));
@@ -1860,7 +1860,7 @@ char *TextReplaceAlloc(const char *text, const char *search, const char *replace
         int tempLen = textLen + (replaceLen - searchLen)*count + 1;
         temp = result = (char *)RL_CALLOC(tempLen, sizeof(char));
 
-        if (result != NULL)   // Memory was allocated
+        if (result != NULL) // Memory was allocated
         {
             // First time through the loop, all the variable are set correctly from here on,
             //  - 'temp' points to the end of the result string
@@ -2736,7 +2736,7 @@ static Font LoadBMFont(const char *fileName)
                        &charId, &charX, &charY, &charWidth, &charHeight, &charOffsetX, &charOffsetY, &charAdvanceX, &pageID);
         fileTextPtr += (readBytes + 1);
 
-        if (readVars == 9)  // Make sure all char data has been properly read
+        if (readVars == 9) // Make sure all char data has been properly read
         {
             // Get character rectangle in the font atlas texture
             font.recs[i] = (Rectangle){ (float)charX, (float)charY + (float)imHeight*pageID, (float)charWidth, (float)charHeight };

src/rtextures.c

@@ -315,7 +315,7 @@ Image LoadImageRaw(const char *fileName, int width, int height, int format, int
         unsigned char *dataPtr = fileData;
         int size = GetPixelDataSize(width, height, format);
 
-        if (size <= dataSize)   // Security check
+        if (size <= dataSize) // Security check
         {
             // Offset file data to expected raw image by header size
             if ((headerSize > 0) && ((headerSize + size) <= dataSize)) dataPtr += headerSize;
@@ -4288,7 +4288,7 @@ TextureCubemap LoadTextureCubemap(Image image, int layout)
 {
     TextureCubemap cubemap = { 0 };
 
-    if (layout == CUBEMAP_LAYOUT_AUTO_DETECT)      // Try to automatically guess layout type
+    if (layout == CUBEMAP_LAYOUT_AUTO_DETECT) // Try to automatically guess layout type
     {
         // Check image width/height to determine the type of cubemap provided
         if (image.width > image.height)