Blatant copy rcorre's 'Fix SetShaderValue and port rlights.'

ReadMe.md

@@ -6,7 +6,7 @@ Manually tweaked, auto generated [raylib](https://github.com/raysan5/raylib) bin
 
 Bindings tested on raylib version 3.7 and Zig 0.9.0-dev
 
-Thanks to jessrud, mbcrocci, Gertkeno and sacredbirdman for their contributions to this binding.
+Thanks to jessrud, mbcrocci, rcorre, Gertkeno and sacredbirdman for their contributions to this binding.
 
 The binding currently only supports a subset of raylib. For more information read [here](https://github.com/Not-Nik/raylib-zig#technical-restrictions).
 

build.zig

@@ -55,6 +55,11 @@ pub fn build(b: *Builder) void {
             .path = "examples/models/models_loading.zig",
             .desc = "Loads a model and renders it",
         },
+        .{
+            .name = "shaders_basic_lighting",
+            .path = "examples/shaders/shaders_basic_lighting.zig",
+            .desc = "Loads a model and renders it",
+        },
     };
 
     const examples_step = b.step("examples", "Builds all the examples");

examples/ReadMe.md

@@ -1,6 +1,6 @@
 # Examples
-Making raylib bindings in zig is pretty straight forward since zig has a built-in c parser, so I am now on a quest to port all the examples.
 
+Making raylib bindings in zig is pretty straight forward since zig has a built-in c parser, so I am now on a quest to port all the examples.
 
 ### category: core
 
@@ -9,13 +9,9 @@ Examples using raylib core platform functionality like window creation, inputs,
 | ## | example  | developer  |
 |----|----------|:----------:|
 | 01 | [core_basic_window](core/basic_window.zig) | ray
-|    |
 | 02 | [core_input_keys](core/input_keys.zig) | ray
-|    |
 | 04 | [core_input_mouse_wheel](core/input_mouse_wheel.zig) | ray
-|    |
 | 06 | [core_input_multitouch](core/input_multitouch.zig) | [Berni](https://github.com/Berni8k)
-|    |
 | 08 | [core_2d_camera](core/2d_camera.zig) | ray
 
 ### category: models
@@ -24,4 +20,13 @@ Examples using raylib models functionality, including models loading/generation
 
 | ## | example  | developer  |
 |----|----------|:----------:|
-| 74 | [models_loading](models/models_loading.zig) ([Won't work](https://github.com/G3bE/raylib-zig#Technical-restrictions)) | ray
+| 74 | [models_loading](models/models_loading.zig) | ray
+
+### category: shaders
+
+Examples using raylib shaders functionality, including shaders loading, parameters configuration and drawing using them (model shaders and postprocessing shaders). This
+functionality is directly provided by raylib rlgl module.
+
+| ## | example  | developer  |
+|----|----------|:----------:|
+| 74 | [shaders_basic_lighting](shaders/shaders_basic_lighting.zig) | [Chris Camacho](https://github.com/codifies)

examples/shaders/rlights.zig

@@ -0,0 +1,126 @@
+// This is a zig port of rlights.h by Ryan Roden-Corrent (rcorre).
+// The original notice follows:
+//
+// *********************************************************************************************
+//
+//    raylib.lights - Some useful functions to deal with lights data
+//
+//    CONFIGURATION:
+//
+//    #define RLIGHTS_IMPLEMENTATION
+//        Generates the implementation of the library into the included file.
+//        If not defined, the library is in header only mode and can be included
+// in other headers or source files without problems. But only ONE file should
+// hold the implementation.
+//
+//    LICENSE: zlib/libpng
+//
+//    Copyright (c) 2017-2020 Victor Fisac (@victorfisac) and Ramon Santamaria
+// (@raysan5)
+//
+//    This software is provided "as-is", without any express or implied warranty.
+// In no event will the authors be held liable for any damages arising from the
+// use of this software.
+//
+//    Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it freely,
+// subject to the following restrictions:
+//
+//      1. The origin of this software must not be misrepresented; you must not
+// claim that you wrote the original software. If you use this software in a
+// product, an acknowledgment in the product documentation would be appreciated
+// but is not required.
+//
+//      2. Altered source versions must be plainly marked as such, and must not
+// be misrepresented as being the original software.
+//
+//      3. This notice may not be removed or altered from any source
+// distribution.
+//
+// *********************************************************************************************/
+
+const std = @import("std");
+usingnamespace @import("raylib");
+
+const max_lights = 4;
+
+pub const Light = struct {
+    type: LightType,
+    position: Vector3,
+    target: Vector3,
+    color: Color,
+    enabled: bool,
+
+    // Shader locations
+    enabledLoc: i32,
+    typeLoc: i32,
+    posLoc: i32,
+    targetLoc: i32,
+    colorLoc: i32,
+};
+
+// Light type
+pub const LightType = enum { directional, point };
+
+var lightsCount: u32 = 0;
+
+fn getShaderLoc(shader: Shader, name: []const u8) !i32 {
+    // TODO: Below code doesn't look good to me,
+    // it assumes a specific shader naming and structure
+    // Probably this implementation could be improved
+    // (note from original C implementation, I don't have a better idea)
+    var buf: [32]u8 = undefined;
+    const key = try std.fmt.bufPrintZ(buf[0..], "lights[{}].{s}", .{ lightsCount, name });
+    return GetShaderLocation(shader, key);
+}
+
+// Create a light and get shader locations
+pub fn CreateLight(typ: LightType, position: Vector3, target: Vector3, color: Color, shader: Shader) !Light {
+    if (lightsCount >= max_lights) {
+        return error.TooManyLights;
+    }
+
+    const light = Light{
+        .enabled = true,
+        .type = typ,
+        .position = position,
+        .target = target,
+        .color = color,
+
+        .enabledLoc = try getShaderLoc(shader, "enabled"),
+        .typeLoc = try getShaderLoc(shader, "type"),
+        .posLoc = try getShaderLoc(shader, "position"),
+        .targetLoc = try getShaderLoc(shader, "target"),
+        .colorLoc = try getShaderLoc(shader, "color"),
+    };
+    UpdateLightValues(shader, light);
+
+    lightsCount += 1;
+
+    return light;
+}
+
+// Send light properties to shader
+// NOTE: Light shader locations should be available
+pub fn UpdateLightValues(shader: Shader, light: Light) void {
+    // Send to shader light enabled state and type
+    SetShaderValue(shader, light.enabledLoc, &light.enabled, @enumToInt(ShaderUniformDataType.UNIFORM_INT));
+    SetShaderValue(shader, light.typeLoc, &light.type, @enumToInt(ShaderUniformDataType.UNIFORM_INT));
+
+    // Send to shader light position values
+    const position = [3]f32{ light.position.x, light.position.y, light.position.z };
+    SetShaderValue(shader, light.posLoc, &position, @enumToInt(ShaderUniformDataType.UNIFORM_VEC3));
+
+    // Send to shader light target position values
+    const target = [3]f32{ light.target.x, light.target.y, light.target.z };
+    SetShaderValue(shader, light.targetLoc, &target, @enumToInt(ShaderUniformDataType.UNIFORM_VEC3));
+
+    // Send to shader light color values
+    const color = [4]f32{
+        @intToFloat(f32, light.color.r) / 255.0,
+        @intToFloat(f32, light.color.g) / 255.0,
+        @intToFloat(f32, light.color.b) / 255.0,
+        @intToFloat(f32, light.color.a) / 255.0,
+    };
+    SetShaderValue(shader, light.colorLoc, &color, @enumToInt(ShaderUniformDataType.UNIFORM_VEC4));
+}

examples/shaders/shaders_basic_lighting.zig

@@ -0,0 +1,182 @@
+//
+// shaders_basic_lighting
+// Zig version:
+// Author: Ryan Roden-Corrent
+// Date: 2021-07-24
+//
+//  NOTE: This example requires raylib OpenGL 3.3 or ES2 versions for shaders
+//  support,
+//        OpenGL 1.1 does not support shaders, recompile raylib to OpenGL 3.3
+//        version.
+//
+//  NOTE: Shaders used in this example are #version 330 (OpenGL 3.3).
+usingnamespace @import("raylib");
+usingnamespace @import("rlights.zig");
+usingnamespace @import("raylib-math");
+
+const resourceDir = "raylib/examples/shaders/resources/";
+
+pub fn main() !void {
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const screenWidth = 800;
+    const screenHeight = 450;
+
+    //SetConfigFlags(.FLAG_MSAA_4X_HINT); // Enable Multi Sampling Anti Aliasing 4x
+    // (if available)
+    InitWindow(screenWidth, screenHeight, "raylib [shaders] example - basic lighting");
+
+    // Define the camera to look into our 3d world
+    const camera = Camera{
+        .position = .{ .x = 2.0, .y = 2.0, .z = 6.0 }, // Camera position
+        .target = .{ .x = 0.0, .y = 0.5, .z = 0.0 }, // Camera looking at point
+        .up = .{ .x = 0.0, .y = 1.0, .z = 0.0 }, // Camera up vector (rotation towards target)
+        .fovy = 45.0, // Camera field-of-view Y
+        .type = CameraType.CAMERA_PERSPECTIVE, // Camera mode type
+    };
+
+    // Load models
+    var modelA = LoadModelFromMesh(GenMeshTorus(0.4, 1.0, 16, 32));
+    var modelB = LoadModelFromMesh(GenMeshCube(1.0, 1.0, 1.0));
+    var modelC = LoadModelFromMesh(GenMeshSphere(0.5, 32, 32));
+
+    // Load models texture
+    const texture = LoadTexture(resourceDir ++ "texel_checker.png");
+
+    // Assign texture to default model material
+    modelA.materials[0].maps[@enumToInt(MAP_DIFFUSE)].texture = texture;
+    modelB.materials[0].maps[@enumToInt(MAP_DIFFUSE)].texture = texture;
+    modelC.materials[0].maps[@enumToInt(MAP_DIFFUSE)].texture = texture;
+
+    var shader = LoadShader(
+        resourceDir ++ "/shaders/glsl330/base_lighting.vs",
+        resourceDir ++ "/shaders/glsl330/lighting.fs",
+    );
+
+    // Get some shader loactions
+    shader.locs[@enumToInt(ShaderLocationIndex.LOC_MATRIX_MODEL)] = GetShaderLocation(shader, "matModel");
+    shader.locs[@enumToInt(ShaderLocationIndex.LOC_VECTOR_VIEW)] = GetShaderLocation(shader, "viewPos");
+
+    // ambient light level
+    const ambientLoc = GetShaderLocation(shader, "ambient");
+    const ambientVals = [4]f32{ 0.2, 0.2, 0.2, 1.0 };
+    SetShaderValue(shader, ambientLoc, &ambientVals, @enumToInt(ShaderUniformDataType.UNIFORM_VEC4));
+
+    var angle: f32 = 6.282;
+
+    // All models use the same shader
+    modelA.materials[0].shader = shader;
+    modelB.materials[0].shader = shader;
+    modelC.materials[0].shader = shader;
+
+    // Using 4 point lights, white, red, green and blue
+    var lights = [_]Light{
+        try CreateLight(LightType.point, .{ .x = 4, .y = 2, .z = 4 }, Vector3Zero(), WHITE, shader),
+        try CreateLight(LightType.point, .{ .x = 4, .y = 2, .z = 4 }, Vector3Zero(), RED, shader),
+        try CreateLight(LightType.point, .{ .x = 0, .y = 4, .z = 2 }, Vector3Zero(), GREEN, shader),
+        try CreateLight(LightType.point, .{ .x = 0, .y = 4, .z = 2 }, Vector3Zero(), BLUE, shader),
+    };
+
+    SetCameraMode(camera, CameraMode.CAMERA_ORBITAL); // Set an orbital camera mode
+
+    SetTargetFPS(60); // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose()) // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        if (IsKeyPressed(KeyboardKey.KEY_W)) {
+            lights[0].enabled = !lights[0].enabled;
+        }
+        if (IsKeyPressed(KeyboardKey.KEY_R)) {
+            lights[1].enabled = !lights[1].enabled;
+        }
+        if (IsKeyPressed(KeyboardKey.KEY_G)) {
+            lights[2].enabled = !lights[2].enabled;
+        }
+        if (IsKeyPressed(KeyboardKey.KEY_B)) {
+            lights[3].enabled = !lights[3].enabled;
+        }
+
+        //UpdateCamera(&camera); // Update camera
+
+        // Make the lights do differing orbits
+        angle -= 0.02;
+        lights[0].position.x = @cos(angle) * 4.0;
+        lights[0].position.z = @sin(angle) * 4.0;
+        lights[1].position.x = @cos(-angle * 0.6) * 4.0;
+        lights[1].position.z = @sin(-angle * 0.6) * 4.0;
+        lights[2].position.y = @cos(angle * 0.2) * 4.0;
+        lights[2].position.z = @sin(angle * 0.2) * 4.0;
+        lights[3].position.y = @cos(-angle * 0.35) * 4.0;
+        lights[3].position.z = @sin(-angle * 0.35) * 4.0;
+
+        UpdateLightValues(shader, lights[0]);
+        UpdateLightValues(shader, lights[1]);
+        UpdateLightValues(shader, lights[2]);
+        UpdateLightValues(shader, lights[3]);
+
+        // Rotate the torus
+        modelA.transform =
+            MatrixMultiply(modelA.transform, MatrixRotateX(-0.025));
+        modelA.transform =
+            MatrixMultiply(modelA.transform, MatrixRotateZ(0.012));
+
+        // Update the light shader with the camera view position
+        const cameraPos = [3]f32{ camera.position.x, camera.position.y, camera.position.z };
+        SetShaderValue(shader, shader.locs[@enumToInt(ShaderLocationIndex.LOC_VECTOR_VIEW)], &cameraPos, @enumToInt(ShaderUniformDataType.UNIFORM_VEC3));
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+        ClearBackground(RAYWHITE);
+
+        BeginMode3D(camera);
+
+        // Draw the three models
+        DrawModel(modelA, Vector3Zero(), 1.0, WHITE);
+        DrawModel(modelB, .{ .x = -1.6, .y = 0, .z = 0 }, 1.0, WHITE);
+        DrawModel(modelC, .{ .x = 1.6, .y = 0, .z = 0 }, 1.0, WHITE);
+
+        // Draw markers to show where the lights are
+        if (lights[0].enabled) {
+            DrawSphereEx(lights[0].position, 0.2, 8, 8, WHITE);
+        }
+        if (lights[1].enabled) {
+            DrawSphereEx(lights[1].position, 0.2, 8, 8, RED);
+        }
+        if (lights[2].enabled) {
+            DrawSphereEx(lights[2].position, 0.2, 8, 8, GREEN);
+        }
+        if (lights[3].enabled) {
+            DrawSphereEx(lights[3].position, 0.2, 8, 8, BLUE);
+        }
+
+        DrawGrid(10, 1.0);
+
+        EndMode3D();
+
+        DrawFPS(10, 10);
+
+        DrawText("Use keys RGBW to toggle lights", 10, 30, 20, DARKGRAY);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    UnloadModel(modelA); // Unload the modelA
+    UnloadModel(modelB); // Unload the modelB
+    UnloadModel(modelC); // Unload the modelC
+
+    UnloadTexture(texture); // Unload the texture
+    UnloadShader(shader); // Unload shader
+
+    CloseWindow(); // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+}

lib/generate_functions.py

@@ -36,6 +36,9 @@ def fix_pointer(name: str, t: str):
         pre += "[*c]"
     if len(pre) != 0:
         t = pre + "const " + t
+
+    if t == "[*c]const void":
+        t = "*const c_void"
     return name, t
 
 

lib/raylib-wa.zig

@@ -23,7 +23,7 @@ pub extern fn SetWindowPosition(x: c_int, y: c_int) void;
 pub extern fn SetWindowMonitor(monitor: c_int) void;
 pub extern fn SetWindowMinSize(width: c_int, height: c_int) void;
 pub extern fn SetWindowSize(width: c_int, height: c_int) void;
-pub extern fn GetWindowHandle() [*c]const void;
+pub extern fn GetWindowHandle() *const c_void;
 pub extern fn GetScreenWidth() c_int;
 pub extern fn GetScreenHeight() c_int;
 pub extern fn GetMonitorCount() c_int;
@@ -68,8 +68,8 @@ pub extern fn LoadShader(vsFileName: [*c]const u8, fsFileName: [*c]const u8) Sha
 pub extern fn LoadShaderFromMemory(vsCode: [*c]const u8, fsCode: [*c]const u8) Shader;
 pub extern fn GetShaderLocation(shader: Shader, uniformName: [*c]const u8) c_int;
 pub extern fn GetShaderLocationAttrib(shader: Shader, attribName: [*c]const u8) c_int;
-pub extern fn SetShaderValue(shader: Shader, locIndex: c_int, value: [*c]const void, uniformType: c_int) void;
-pub extern fn SetShaderValueV(shader: Shader, locIndex: c_int, value: [*c]const void, uniformType: c_int, count: c_int) void;
+pub extern fn SetShaderValue(shader: Shader, locIndex: c_int, value: *const c_void, uniformType: c_int) void;
+pub extern fn SetShaderValueV(shader: Shader, locIndex: c_int, value: *const c_void, uniformType: c_int, count: c_int) void;
 pub extern fn SetShaderValueMatrix(shader: Shader, locIndex: c_int, mat: Matrix) void;
 pub extern fn SetShaderValueTexture(shader: Shader, locIndex: c_int, texture: Texture2D) void;
 pub extern fn UnloadShader(shader: Shader) void;
@@ -89,9 +89,9 @@ pub extern fn TakeScreenshot(fileName: [*c]const u8) void;
 pub extern fn SetConfigFlags(flags: c_uint) void;
 pub extern fn TraceLog(logLevel: c_int, text: [*c]const u8, ...) void;
 pub extern fn SetTraceLogLevel(logLevel: c_int) void;
-pub extern fn MemAlloc(size: c_int) [*c]const void;
-pub extern fn MemRealloc(ptr: [*c]const void, size: c_int) [*c]const void;
-pub extern fn MemFree(ptr: [*c]const void) void;
+pub extern fn MemAlloc(size: c_int) *const c_void;
+pub extern fn MemRealloc(ptr: *const c_void, size: c_int) *const c_void;
+pub extern fn MemFree(ptr: *const c_void) void;
 pub extern fn SetTraceLogCallback(callback: TraceLogCallback) void;
 pub extern fn SetLoadFileDataCallback(callback: LoadFileDataCallback) void;
 pub extern fn SetSaveFileDataCallback(callback: SaveFileDataCallback) void;
@@ -99,7 +99,7 @@ pub extern fn SetLoadFileTextCallback(callback: LoadFileTextCallback) void;
 pub extern fn SetSaveFileTextCallback(callback: SaveFileTextCallback) void;
 pub extern fn LoadFileData(fileName: [*c]const u8, bytesRead: [*c]const c_uint) [*c]const u8;
 pub extern fn UnloadFileData(data: [*c]const u8) void;
-pub extern fn SaveFileData(fileName: [*c]const u8, data: [*c]const void, bytesToWrite: c_uint) bool;
+pub extern fn SaveFileData(fileName: [*c]const u8, data: *const c_void, bytesToWrite: c_uint) bool;
 pub extern fn LoadFileText(fileName: [*c]const u8) [*c]const u8;
 pub extern fn UnloadFileText(text: [*c]const u8) void;
 pub extern fn SaveFileText(fileName: [*c]const u8, text: [*c]const u8) bool;
@@ -282,8 +282,8 @@ pub extern fn LoadTextureCubemap(image: Image, layout: c_int) TextureCubemap;
 pub extern fn LoadRenderTexture(width: c_int, height: c_int) RenderTexture2D;
 pub extern fn UnloadTexture(texture: Texture2D) void;
 pub extern fn UnloadRenderTexture(target: RenderTexture2D) void;
-pub extern fn UpdateTexture(texture: Texture2D, pixels: [*c]const void) void;
-pub extern fn UpdateTextureRec(texture: Texture2D, rec: Rectangle, pixels: [*c]const void) void;
+pub extern fn UpdateTexture(texture: Texture2D, pixels: *const c_void) void;
+pub extern fn UpdateTextureRec(texture: Texture2D, rec: Rectangle, pixels: *const c_void) void;
 pub extern fn GetTextureData(texture: Texture2D) Image;
 pub extern fn GetScreenData() Image;
 pub extern fn GenTextureMipmaps(texture: [*c]const Texture2D) void;
@@ -307,8 +307,8 @@ pub extern fn ColorFromHSV(hue: f32, saturation: f32, value: f32) Color;
 pub extern fn ColorAlpha(color: Color, alpha: f32) Color;
 pub extern fn ColorAlphaBlend(dst: Color, src: Color, tint: Color) Color;
 pub extern fn GetColor(hexValue: c_int) Color;
-pub extern fn GetPixelColor(srcPtr: [*c]const void, format: c_int) Color;
-pub extern fn SetPixelColor(dstPtr: [*c]const void, color: Color, format: c_int) void;
+pub extern fn GetPixelColor(srcPtr: *const c_void, format: c_int) Color;
+pub extern fn SetPixelColor(dstPtr: *const c_void, color: Color, format: c_int) void;
 pub extern fn GetPixelDataSize(width: c_int, height: c_int, format: c_int) c_int;
 pub extern fn GetFontDefault() Font;
 pub extern fn LoadFont(fileName: [*c]const u8) Font;
@@ -371,7 +371,7 @@ pub extern fn LoadModelFromMesh(mesh: Mesh) Model;
 pub extern fn UnloadModel(model: Model) void;
 pub extern fn UnloadModelKeepMeshes(model: Model) void;
 pub extern fn UploadMesh(mesh: [*c]const Mesh, dynamic: bool) void;
-pub extern fn UpdateMeshBuffer(mesh: Mesh, index: c_int, data: [*c]const void, dataSize: c_int, offset: c_int) void;
+pub extern fn UpdateMeshBuffer(mesh: Mesh, index: c_int, data: *const c_void, dataSize: c_int, offset: c_int) void;
 pub extern fn DrawMesh(mesh: Mesh, material: Material, transform: Matrix) void;
 pub extern fn DrawMeshInstanced(mesh: Mesh, material: Material, transforms: [*c]const Matrix, instances: c_int) void;
 pub extern fn UnloadMesh(mesh: Mesh) void;
@@ -424,7 +424,7 @@ pub extern fn LoadWave(fileName: [*c]const u8) Wave;
 pub extern fn LoadWaveFromMemory(fileType: [*c]const u8, fileData: [*c]const u8, dataSize: c_int) Wave;
 pub extern fn LoadSound(fileName: [*c]const u8) Sound;
 pub extern fn LoadSoundFromWave(wave: Wave) Sound;
-pub extern fn UpdateSound(sound: Sound, data: [*c]const void, samplesCount: c_int) void;
+pub extern fn UpdateSound(sound: Sound, data: *const c_void, samplesCount: c_int) void;
 pub extern fn UnloadWave(wave: Wave) void;
 pub extern fn UnloadSound(sound: Sound) void;
 pub extern fn ExportWave(wave: Wave, fileName: [*c]const u8) bool;
@@ -458,7 +458,7 @@ pub extern fn SetMusicPitch(music: Music, pitch: f32) void;
 pub extern fn GetMusicTimeLength(music: Music) f32;
 pub extern fn GetMusicTimePlayed(music: Music) f32;
 pub extern fn InitAudioStream(sampleRate: c_uint, sampleSize: c_uint, channels: c_uint) AudioStream;
-pub extern fn UpdateAudioStream(stream: AudioStream, data: [*c]const void, samplesCount: c_int) void;
+pub extern fn UpdateAudioStream(stream: AudioStream, data: *const c_void, samplesCount: c_int) void;
 pub extern fn CloseAudioStream(stream: AudioStream) void;
 pub extern fn IsAudioStreamProcessed(stream: AudioStream) bool;
 pub extern fn PlayAudioStream(stream: AudioStream) void;