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

Examples/Shaders/TextureDrawing.cs

@@ -0,0 +1,86 @@
+/*******************************************************************************************
+*
+*   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 TextureDrawing
+{
+    const int GlslVersion = 330;
+
+    public static int Main()
+    {
+        // Initialization
+        //--------------------------------------------------------------------------------------
+        const int screenWidth = 800;
+        const int screenHeight = 450;
+
+        InitWindow(screenWidth, screenHeight, "raylib [shaders] example - texture drawing");
+
+        // Load blank texture to fill on shader
+        Image imBlank = GenImageColor(1024, 1024, Color.BLANK);
+        Texture2D texture = LoadTextureFromImage(imBlank);
+        UnloadImage(imBlank);
+
+        // NOTE: Using GLSL 330 shader version, on OpenGL ES 2.0 use GLSL 100 shader version
+        Shader shader = LoadShader(null, $"resources/shaders/glsl{GlslVersion}/cubes_panning.fs");
+
+        float time = 0.0f;
+        int timeLoc = GetShaderLocation(shader, "uTime");
+        Raylib.SetShaderValue(shader, timeLoc, time, ShaderUniformDataType.SHADER_UNIFORM_FLOAT);
+
+        SetTargetFPS(60);
+        //--------------------------------------------------------------------------------------
+
+        // Main game loop
+        while (!WindowShouldClose())
+        {
+            // Update
+            //----------------------------------------------------------------------------------
+            time = (float)GetTime();
+            Raylib.SetShaderValue(shader, timeLoc, time, ShaderUniformDataType.SHADER_UNIFORM_FLOAT);
+            //----------------------------------------------------------------------------------
+
+            // Draw
+            //----------------------------------------------------------------------------------
+            BeginDrawing();
+            ClearBackground(Color.RAYWHITE);
+
+            // Enable our custom shader for next shapes/textures drawings
+            BeginShaderMode(shader);
+
+            // Drawing blank texture, all magic happens on shader
+            DrawTexture(texture, 0, 0, Color.WHITE);
+
+            // Disable our custom shader, return to default shader
+            EndShaderMode();
+
+            DrawText("BACKGROUND is PAINTED and ANIMATED on SHADER!", 10, 10, 20, Color.MAROON);
+
+            EndDrawing();
+            //----------------------------------------------------------------------------------
+        }
+
+        // De-Initialization
+        //--------------------------------------------------------------------------------------
+        UnloadShader(shader);
+
+        CloseWindow();
+        //--------------------------------------------------------------------------------------
+
+        return 0;
+    }
+}