Allow passing points for drawing as const slices (#127)

lib/generate_functions.py

@@ -34,6 +34,9 @@ IGNORE_TYPES = [
     "[*c]ModelAnimation",
     "[*c]f32",
 ]
+MAKE_CONST = [
+    "points"
+]
 # Some C types have a different sizes on different systems and Zig
 # knows that so we tell it to get the system specific size for us.
 def c_to_zig_type(c: str) -> str:
@@ -140,6 +143,9 @@ def fix_pointer(name: str, t: str):
     while name.startswith("*"):
         name = name[1:]
         pre += "[*c]"
+
+    if name in MAKE_CONST:
+        pre += "const "
     t = pre + t
 
     if t == "[*c]const void":

lib/preludes/raylib-prelude.zig

@@ -2227,48 +2227,48 @@ pub fn loadMusicStreamFromMemory(fileType: [*:0]const u8, data: []const u8) Musi
 }
 
 /// Draw lines sequence (using gl lines)
-pub fn drawLineStrip(points: []Vector2, color: Color) void {
-    cdef.DrawLineStrip(@as([*c]Vector2, @ptrCast(points)), @as(c_int, @intCast(points.len)), color);
+pub fn drawLineStrip(points: []const Vector2, color: Color) void {
+    cdef.DrawLineStrip(@as([*c]const Vector2, @ptrCast(points)), @as(c_int, @intCast(points.len)), color);
 }
 
 /// Draw a triangle fan defined by points (first vertex is the center)
-pub fn drawTriangleFan(points: []Vector2, color: Color) void {
-    cdef.DrawTriangleFan(@as([*c]Vector2, @ptrCast(points)), @as(c_int, @intCast(points.len)), color);
+pub fn drawTriangleFan(points: []const Vector2, color: Color) void {
+    cdef.DrawTriangleFan(@as([*c]const Vector2, @ptrCast(points)), @as(c_int, @intCast(points.len)), color);
 }
 
 /// Draw a triangle strip defined by points
-pub fn drawTriangleStrip(points: []Vector2, color: Color) void {
-    cdef.DrawTriangleStrip(@as([*c]Vector2, @ptrCast(points)), @as(c_int, @intCast(points.len)), color);
+pub fn drawTriangleStrip(points: []const Vector2, color: Color) void {
+    cdef.DrawTriangleStrip(@as([*c]const Vector2, @ptrCast(points)), @as(c_int, @intCast(points.len)), color);
 }
 
 /// Draw spline: Linear, minimum 2 points
-pub fn drawSplineLinear(points: []Vector2, thick: f32, color: Color) void {
-    cdef.DrawSplineLinear(@as([*c]Vector2, @ptrCast(points)), @as(c_int, @intCast(points.len)), thick, color);
+pub fn drawSplineLinear(points: []const Vector2, thick: f32, color: Color) void {
+    cdef.DrawSplineLinear(@as([*c]const Vector2, @ptrCast(points)), @as(c_int, @intCast(points.len)), thick, color);
 }
 
 /// Draw spline: B-Spline, minimum 4 points
-pub fn drawSplineBasis(points: []Vector2, thick: f32, color: Color) void {
-    cdef.DrawSplineBasis(@as([*c]Vector2, @ptrCast(points)), @as(c_int, @intCast(points.len)), thick, color);
+pub fn drawSplineBasis(points: []const Vector2, thick: f32, color: Color) void {
+    cdef.DrawSplineBasis(@as([*c]const Vector2, @ptrCast(points)), @as(c_int, @intCast(points.len)), thick, color);
 }
 
 /// Draw spline: Catmull-Rom, minimum 4 points
-pub fn drawSplineCatmullRom(points: []Vector2, thick: f32, color: Color) void {
-    cdef.DrawSplineCatmullRom(@as([*c]Vector2, @ptrCast(points)), @as(c_int, @intCast(points.len)), thick, color);
+pub fn drawSplineCatmullRom(points: []const Vector2, thick: f32, color: Color) void {
+    cdef.DrawSplineCatmullRom(@as([*c]const Vector2, @ptrCast(points)), @as(c_int, @intCast(points.len)), thick, color);
 }
 
 /// Draw spline: Quadratic Bezier, minimum 3 points (1 control point): [p1, c2, p3, c4...]
-pub fn drawSplineBezierQuadratic(points: []Vector2, thick: f32, color: Color) void {
-    cdef.DrawSplineBezierQuadratic(@as([*c]Vector2, @ptrCast(points)), @as(c_int, @intCast(points.len)), thick, color);
+pub fn drawSplineBezierQuadratic(points: []const Vector2, thick: f32, color: Color) void {
+    cdef.DrawSplineBezierQuadratic(@as([*c]const Vector2, @ptrCast(points)), @as(c_int, @intCast(points.len)), thick, color);
 }
 
 /// Draw spline: Cubic Bezier, minimum 4 points (2 control points): [p1, c2, c3, p4, c5, c6...]
-pub fn drawSplineBezierCubic(points: []Vector2, thick: f32, color: Color) void {
-    cdef.DrawSplineBezierCubic(@as([*c]Vector2, @ptrCast(points)), @as(c_int, @intCast(points.len)), thick, color);
+pub fn drawSplineBezierCubic(points: []const Vector2, thick: f32, color: Color) void {
+    cdef.DrawSplineBezierCubic(@as([*c]const Vector2, @ptrCast(points)), @as(c_int, @intCast(points.len)), thick, color);
 }
 
 /// Check if point is within a polygon described by array of vertices
-pub fn checkCollisionPointPoly(point: Vector2, points: []Vector2) bool {
-    return cdef.CheckCollisionPointPoly(point, @as([*c]Vector2, @ptrCast(points)), @as(c_int, @intCast(points.len)));
+pub fn checkCollisionPointPoly(point: Vector2, points: []const Vector2) bool {
+    return cdef.CheckCollisionPointPoly(point, @as([*c]const Vector2, @ptrCast(points)), @as(c_int, @intCast(points.len)));
 }
 
 pub fn imageKernelConvolution(image: *Image, kernel: []f32) void {
@@ -2296,8 +2296,8 @@ pub fn textJoin(textList: [][*:0]const u8, delimiter: [*:0]const u8) [*:0]const
 }
 
 /// Draw a triangle strip defined by points
-pub fn drawTriangleStrip3D(points: []Vector3, color: Color) void {
-    cdef.DrawTriangleStrip3D(@as([*c]Vector3, @ptrCast(points)), @as(c_int, @intCast(points.len)), color);
+pub fn drawTriangleStrip3D(points: []const Vector3, color: Color) void {
+    cdef.DrawTriangleStrip3D(@as([*c]const Vector3, @ptrCast(points)), @as(c_int, @intCast(points.len)), color);
 }
 
 /// Internal memory allocator

lib/raylib-ext.zig

@@ -212,7 +212,7 @@ pub extern "c" fn DrawPixelV(position: rl.Vector2, color: rl.Color) void;
 pub extern "c" fn DrawLine(startPosX: c_int, startPosY: c_int, endPosX: c_int, endPosY: c_int, color: rl.Color) void;
 pub extern "c" fn DrawLineV(startPos: rl.Vector2, endPos: rl.Vector2, color: rl.Color) void;
 pub extern "c" fn DrawLineEx(startPos: rl.Vector2, endPos: rl.Vector2, thick: f32, color: rl.Color) void;
-pub extern "c" fn DrawLineStrip(points: [*c]rl.Vector2, pointCount: c_int, color: rl.Color) void;
+pub extern "c" fn DrawLineStrip(points: [*c]const rl.Vector2, pointCount: c_int, color: rl.Color) void;
 pub extern "c" fn DrawLineBezier(startPos: rl.Vector2, endPos: rl.Vector2, thick: f32, color: rl.Color) void;
 pub extern "c" fn DrawCircle(centerX: c_int, centerY: c_int, radius: f32, color: rl.Color) void;
 pub extern "c" fn DrawCircleSector(center: rl.Vector2, radius: f32, startAngle: f32, endAngle: f32, segments: c_int, color: rl.Color) void;
@@ -239,16 +239,16 @@ pub extern "c" fn DrawRectangleRoundedLines(rec: rl.Rectangle, roundness: f32, s
 pub extern "c" fn DrawRectangleRoundedLinesEx(rec: rl.Rectangle, roundness: f32, segments: c_int, lineThick: f32, color: rl.Color) void;
 pub extern "c" fn DrawTriangle(v1: rl.Vector2, v2: rl.Vector2, v3: rl.Vector2, color: rl.Color) void;
 pub extern "c" fn DrawTriangleLines(v1: rl.Vector2, v2: rl.Vector2, v3: rl.Vector2, color: rl.Color) void;
-pub extern "c" fn DrawTriangleFan(points: [*c]rl.Vector2, pointCount: c_int, color: rl.Color) void;
-pub extern "c" fn DrawTriangleStrip(points: [*c]rl.Vector2, pointCount: c_int, color: rl.Color) void;
+pub extern "c" fn DrawTriangleFan(points: [*c]const rl.Vector2, pointCount: c_int, color: rl.Color) void;
+pub extern "c" fn DrawTriangleStrip(points: [*c]const rl.Vector2, pointCount: c_int, color: rl.Color) void;
 pub extern "c" fn DrawPoly(center: rl.Vector2, sides: c_int, radius: f32, rotation: f32, color: rl.Color) void;
 pub extern "c" fn DrawPolyLines(center: rl.Vector2, sides: c_int, radius: f32, rotation: f32, color: rl.Color) void;
 pub extern "c" fn DrawPolyLinesEx(center: rl.Vector2, sides: c_int, radius: f32, rotation: f32, lineThick: f32, color: rl.Color) void;
-pub extern "c" fn DrawSplineLinear(points: [*c]rl.Vector2, pointCount: c_int, thick: f32, color: rl.Color) void;
-pub extern "c" fn DrawSplineBasis(points: [*c]rl.Vector2, pointCount: c_int, thick: f32, color: rl.Color) void;
-pub extern "c" fn DrawSplineCatmullRom(points: [*c]rl.Vector2, pointCount: c_int, thick: f32, color: rl.Color) void;
-pub extern "c" fn DrawSplineBezierQuadratic(points: [*c]rl.Vector2, pointCount: c_int, thick: f32, color: rl.Color) void;
-pub extern "c" fn DrawSplineBezierCubic(points: [*c]rl.Vector2, pointCount: c_int, thick: f32, color: rl.Color) void;
+pub extern "c" fn DrawSplineLinear(points: [*c]const rl.Vector2, pointCount: c_int, thick: f32, color: rl.Color) void;
+pub extern "c" fn DrawSplineBasis(points: [*c]const rl.Vector2, pointCount: c_int, thick: f32, color: rl.Color) void;
+pub extern "c" fn DrawSplineCatmullRom(points: [*c]const rl.Vector2, pointCount: c_int, thick: f32, color: rl.Color) void;
+pub extern "c" fn DrawSplineBezierQuadratic(points: [*c]const rl.Vector2, pointCount: c_int, thick: f32, color: rl.Color) void;
+pub extern "c" fn DrawSplineBezierCubic(points: [*c]const rl.Vector2, pointCount: c_int, thick: f32, color: rl.Color) void;
 pub extern "c" fn DrawSplineSegmentLinear(p1: rl.Vector2, p2: rl.Vector2, thick: f32, color: rl.Color) void;
 pub extern "c" fn DrawSplineSegmentBasis(p1: rl.Vector2, p2: rl.Vector2, p3: rl.Vector2, p4: rl.Vector2, thick: f32, color: rl.Color) void;
 pub extern "c" fn DrawSplineSegmentCatmullRom(p1: rl.Vector2, p2: rl.Vector2, p3: rl.Vector2, p4: rl.Vector2, thick: f32, color: rl.Color) void;
@@ -265,7 +265,7 @@ pub extern "c" fn CheckCollisionCircleRec(center: rl.Vector2, radius: f32, rec:
 pub extern "c" fn CheckCollisionPointRec(point: rl.Vector2, rec: rl.Rectangle) bool;
 pub extern "c" fn CheckCollisionPointCircle(point: rl.Vector2, center: rl.Vector2, radius: f32) bool;
 pub extern "c" fn CheckCollisionPointTriangle(point: rl.Vector2, p1: rl.Vector2, p2: rl.Vector2, p3: rl.Vector2) bool;
-pub extern "c" fn CheckCollisionPointPoly(point: rl.Vector2, points: [*c]rl.Vector2, pointCount: c_int) bool;
+pub extern "c" fn CheckCollisionPointPoly(point: rl.Vector2, points: [*c]const rl.Vector2, pointCount: c_int) bool;
 pub extern "c" fn CheckCollisionLines(startPos1: rl.Vector2, endPos1: rl.Vector2, startPos2: rl.Vector2, endPos2: rl.Vector2, collisionPoint: [*c]rl.Vector2) bool;
 pub extern "c" fn CheckCollisionPointLine(point: rl.Vector2, p1: rl.Vector2, p2: rl.Vector2, threshold: c_int) bool;
 pub extern "c" fn CheckCollisionCircleLine(center: rl.Vector2, radius: f32, p1: rl.Vector2, p2: rl.Vector2) bool;
@@ -432,7 +432,7 @@ pub extern "c" fn DrawLine3D(startPos: rl.Vector3, endPos: rl.Vector3, color: rl
 pub extern "c" fn DrawPoint3D(position: rl.Vector3, color: rl.Color) void;
 pub extern "c" fn DrawCircle3D(center: rl.Vector3, radius: f32, rotationAxis: rl.Vector3, rotationAngle: f32, color: rl.Color) void;
 pub extern "c" fn DrawTriangle3D(v1: rl.Vector3, v2: rl.Vector3, v3: rl.Vector3, color: rl.Color) void;
-pub extern "c" fn DrawTriangleStrip3D(points: [*c]rl.Vector3, pointCount: c_int, color: rl.Color) void;
+pub extern "c" fn DrawTriangleStrip3D(points: [*c]const rl.Vector3, pointCount: c_int, color: rl.Color) void;
 pub extern "c" fn DrawCube(position: rl.Vector3, width: f32, height: f32, length: f32, color: rl.Color) void;
 pub extern "c" fn DrawCubeV(position: rl.Vector3, size: rl.Vector3, color: rl.Color) void;
 pub extern "c" fn DrawCubeWires(position: rl.Vector3, width: f32, height: f32, length: f32, color: rl.Color) void;