Update/merge examples back into main repo (#192)

Examples/Shaders/TextureOutline.cs

@@ -0,0 +1,119 @@
+/*******************************************************************************************
+*
+*   raylib [textures] example - Texture drawing
+*
+*   This example illustrates how to draw on a blank texture using a shader
+*
+*   This example has been created using raylib 2.0 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Example contributed by Michał Ciesielski and reviewed by Ramon Santamaria (@raysan5)
+*
+*   Copyright (c) 2019 Michał Ciesielski and Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+using static Raylib_cs.Raylib;
+
+namespace Examples.Shaders;
+
+public class TextureOutline
+{
+    const int GLSL_VERSION = 330;
+
+    public static int Main()
+    {
+        // Initialization
+        //--------------------------------------------------------------------------------------
+        const int screenWidth = 800;
+        const int screenHeight = 450;
+
+        InitWindow(screenWidth, screenHeight, "raylib [shaders] example - Apply an outline to a texture");
+
+        Texture2D texture = LoadTexture("resources/fudesumi.png");
+        Shader shdrOutline = LoadShader(null, $"resources/shaders/glsl{GLSL_VERSION}/outline.fs");
+
+        float outlineSize = 2.0f;
+
+        // Normalized red color
+        float[] outlineColor = new[] { 1.0f, 0.0f, 0.0f, 1.0f };
+        float[] textureSize = { (float)texture.Width, (float)texture.Height };
+
+        // Get shader locations
+        int outlineSizeLoc = GetShaderLocation(shdrOutline, "outlineSize");
+        int outlineColorLoc = GetShaderLocation(shdrOutline, "outlineColor");
+        int textureSizeLoc = GetShaderLocation(shdrOutline, "textureSize");
+
+        // Set shader values (they can be changed later)
+        Raylib.SetShaderValue(
+            shdrOutline,
+            outlineSizeLoc,
+            outlineSize,
+            ShaderUniformDataType.SHADER_UNIFORM_FLOAT
+        );
+        Raylib.SetShaderValue(
+            shdrOutline,
+            outlineColorLoc,
+            outlineColor,
+            ShaderUniformDataType.SHADER_UNIFORM_VEC4
+        );
+        Raylib.SetShaderValue(
+            shdrOutline,
+            textureSizeLoc,
+            textureSize,
+            ShaderUniformDataType.SHADER_UNIFORM_VEC2
+        );
+
+        SetTargetFPS(60);
+        //--------------------------------------------------------------------------------------
+
+        // Main game loop
+        while (!WindowShouldClose())
+        {
+            // Update
+            //----------------------------------------------------------------------------------
+            outlineSize += GetMouseWheelMove();
+            if (outlineSize < 1.0f)
+            {
+                outlineSize = 1.0f;
+            }
+
+            Raylib.SetShaderValue(
+                shdrOutline,
+                outlineSizeLoc,
+                outlineSize,
+                ShaderUniformDataType.SHADER_UNIFORM_FLOAT
+            );
+            //----------------------------------------------------------------------------------
+
+            // Draw
+            //----------------------------------------------------------------------------------
+            BeginDrawing();
+
+            ClearBackground(Color.RAYWHITE);
+
+            BeginShaderMode(shdrOutline);
+            DrawTexture(texture, GetScreenWidth() / 2 - texture.Width / 2, -30, Color.WHITE);
+            EndShaderMode();
+
+            DrawText("Shader-based\ntexture\noutline", 10, 10, 20, Color.GRAY);
+
+            DrawText($"Outline size: {outlineSize} px", 10, 120, 20, Color.MAROON);
+
+            DrawFPS(710, 10);
+
+            EndDrawing();
+            //----------------------------------------------------------------------------------
+        }
+
+        // De-Initialization
+        //--------------------------------------------------------------------------------------
+        UnloadTexture(texture);
+        UnloadShader(shdrOutline);
+
+        CloseWindow();
+        //--------------------------------------------------------------------------------------
+
+        return 0;
+    }
+}