add draw rectangle rounded example

examples/shapes/draw_rectangle_rounded.zig

@@ -0,0 +1,73 @@
+const rl = @import("raylib");
+const rgui = @import("raygui");
+
+fn labelFmt(segments: f32) [*c]const u8 {
+    if (segments >= 4) return "MANUAL";
+    return "AUTO";
+}
+
+fn colorFmt(segments: f32) rl.Color {
+    if (segments >= 4) return rl.Color.maroon;
+    return rl.Color.dark_gray;
+}
+
+pub fn main() anyerror!void {
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const screenWidth = 800;
+    const screenHeight = 450;
+
+    rl.initWindow(screenWidth, screenHeight, "raylib-zig [shapes] example - draw rectangle rounded");
+    defer rl.closeWindow(); // Close window and OpenGL context
+
+    var roundness: f32 = 0.2;
+    var width: f32 = 200.0;
+    var height: f32 = 100.0;
+    var segments: f32 = 0.0;
+    var lineThick: f32 = 1.0;
+
+    var drawRect: bool = false;
+    var drawRoundedRect: bool = true;
+    var drawRoundedLines: bool = false;
+
+    rl.setTargetFPS(60); // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!rl.windowShouldClose()) { // Detect window close button or ESC key
+        // Update
+        //----------------------------------------------------------------------------------
+        const rec = rl.Rectangle{ .x = (@as(f32, @floatFromInt(rl.getScreenWidth())) - width - 250) / 2.0, .y = (@as(f32, @floatFromInt(rl.getScreenHeight())) - height) / 2.0, .width = width, .height = height };
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        rl.beginDrawing();
+        defer rl.endDrawing();
+
+        rl.clearBackground(rl.Color.ray_white);
+
+        rl.drawLine(560, 0, 560, rl.getScreenHeight(), rl.fade(rl.Color.light_gray, 0.6));
+        rl.drawRectangle(560, 0, rl.getScreenWidth() - 500, rl.getScreenHeight(), rl.fade(rl.Color.light_gray, 0.3));
+
+        if (drawRect) rl.drawRectangleRec(rec, rl.fade(rl.Color.gold, 0.6));
+        if (drawRoundedRect) rl.drawRectangleRounded(rec, roundness, @as(i32, @intFromFloat(segments)), rl.fade(rl.Color.maroon, 0.2));
+        if (drawRoundedLines) rl.drawRectangleRoundedLinesEx(rec, roundness, @as(i32, @intFromFloat(segments)), lineThick, rl.fade(rl.Color.maroon, 0.4));
+
+        // Draw GUI controls
+        _ = rgui.guiSliderBar(rl.Rectangle{ .x = 640, .y = 40, .width = 105, .height = 20 }, "Width", rl.textFormat("%.2", .{width}), &width, 0, @as(f32, @floatFromInt(rl.getScreenWidth() - 300)));
+        _ = rgui.guiSliderBar(rl.Rectangle{ .x = 640, .y = 70, .width = 105, .height = 20 }, "Height", rl.textFormat("%.2", .{height}), &height, 0, @as(f32, @floatFromInt(rl.getScreenHeight() - 50)));
+        _ = rgui.guiSliderBar(rl.Rectangle{ .x = 640, .y = 140, .width = 105, .height = 20 }, "Roundness", rl.textFormat("%.2", .{roundness}), &roundness, 0.0, 1.0);
+        _ = rgui.guiSliderBar(rl.Rectangle{ .x = 640, .y = 170, .width = 105, .height = 20 }, "Thickness", rl.textFormat("%.2", .{lineThick}), &lineThick, 0, 20);
+        _ = rgui.guiSliderBar(rl.Rectangle{ .x = 640, .y = 240, .width = 105, .height = 20 }, "Segments", rl.textFormat("%.2", .{segments}), &segments, 0, 60);
+
+        _ = rgui.guiCheckBox(rl.Rectangle{ .x = 640, .y = 320, .width = 20, .height = 20 }, "DrawRoundedRect", &drawRoundedRect);
+        _ = rgui.guiCheckBox(rl.Rectangle{ .x = 640, .y = 350, .width = 20, .height = 20 }, "DrawRoundedLines", &drawRoundedLines);
+        _ = rgui.guiCheckBox(rl.Rectangle{ .x = 640, .y = 380, .width = 20, .height = 20 }, "DrawRect", &drawRect);
+
+        rl.drawText(rl.textFormat("MODE: %s", .{labelFmt(segments)}), 640, 280, 10, colorFmt(segments));
+
+        rl.drawFPS(10, 10);
+        //----------------------------------------------------------------------------------
+    }
+}