Added texture_image_9patch.c example

examples/textures/textures_image_9patch.c

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+/*******************************************************************************************
+*
+*   raylib [textures] example - 9-patch drawing
+*
+*   NOTE: Images are loaded in CPU memory (RAM); textures are loaded in GPU memory (VRAM)
+*
+*   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)
+*
+*   Copyright (c) 2016 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+int main()
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    int screenWidth = 800;
+    int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [textures] example - 9-patch drawing");
+
+    // NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required)
+    Texture2D nPatchTexture = LoadTexture("resources/ninepatch_button.png");
+    Vector2 mousePosition;
+    Vector2 origin = {0.0f, 0.0f};
+
+    // The location and size of the n-patches.
+    Rectangle dstRec1 = {480.0f, 160.0f, 32.0f, 32.0f};
+    Rectangle dstRec2 = {160.0f, 160.0f, 32.0f, 32.0f};
+    Rectangle dstRecH = {160.0f, 93.0f, 32.0f, 32.0f};   // this rec's height is ignored
+    Rectangle dstRecV = {92.0f, 160.0f, 32.0f, 32.0f};   // this rec's width is ignored
+
+    // A 9-patch (NPT_9PATCH) changes its sizes in both axis
+    NPatchInfo ninePatchInfo1 = {(Rectangle){0.0f, 0.0f, 64.0f, 64.0f}, 12, 40, 12, 12, NPT_9PATCH };
+    NPatchInfo ninePatchInfo2 = {(Rectangle){0.0f, 128.0f, 64.0f, 64.0f}, 16, 16, 16, 16, NPT_9PATCH };
+    // A horizontal 3-patch (NPT_3PATCH_HORIZONTAL) changes its sizes along the x axis only
+    NPatchInfo h3PatchInfo = {(Rectangle){0.0f,  64.0f, 64.0f, 64.0f}, 8, 8, 8, 8, NPT_3PATCH_HORIZONTAL };
+    // A vertical 3-patch (NPT_3PATCH_VERTICAL) changes its sizes along the y axis only
+    NPatchInfo v3PatchInfo = {(Rectangle){0.0f, 192.0f, 64.0f, 64.0f}, 6, 6, 6, 6, NPT_3PATCH_VERTICAL };
+    
+    SetTargetFPS(60);
+    //---------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        mousePosition = GetMousePosition();
+        // resize the n-patches based on mouse position.
+        dstRec1.width = mousePosition.x - dstRec1.x;
+        dstRec1.height = mousePosition.y - dstRec1.y;
+        dstRec2.width = mousePosition.x - dstRec2.x;
+        dstRec2.height = mousePosition.y - dstRec2.y;
+        dstRecH.width = mousePosition.x - dstRecH.x;
+        dstRecV.height = mousePosition.y - dstRecV.y;
+
+        // set a minimum width and/or height
+        if (dstRec1.width < 1.0f) dstRec1.width = 1.0f;
+        if (dstRec1.width > 300.0f) dstRec1.width = 300.0f;
+        if (dstRec1.height < 1.0f) dstRec1.height = 1.0f;
+        if (dstRec2.width < 1.0f) dstRec2.width = 1.0f;
+        if (dstRec2.width > 300.0f) dstRec2.width = 300.0f;
+        if (dstRec2.height < 1.0f) dstRec2.height = 1.0f;
+        if (dstRecH.width < 1.0f) dstRecH.width = 1.0f;
+        if (dstRecV.height < 1.0f) dstRecV.height = 1.0f;
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+
+            // Draw the n-patches
+            DrawTextureNPatch(nPatchTexture, ninePatchInfo2, dstRec2, origin, 0.0f, WHITE);
+            DrawTextureNPatch(nPatchTexture, ninePatchInfo1, dstRec1, origin, 0.0f, WHITE);
+            DrawTextureNPatch(nPatchTexture, h3PatchInfo, dstRecH, origin, 0.0f, WHITE);
+            DrawTextureNPatch(nPatchTexture, v3PatchInfo, dstRecV, origin, 0.0f, WHITE);
+            
+            // Draw the source texture
+            DrawRectangleLines( 5, 88, 74, 266, BLUE);
+            DrawTexture(nPatchTexture, 10, 93, WHITE);
+            DrawText("TEXTURE", 15, 360, 10, DARKGRAY);
+
+            DrawRectangle( 10, 10, 250, 73, Fade(SKYBLUE, 0.5));
+            DrawRectangleLines( 10, 10, 250, 73, BLUE);
+
+            DrawText("9-Patch and 3-Patch example", 20, 20, 10, BLACK);
+            DrawText("  Move the mouse to stretch or", 40, 40, 10, DARKGRAY);
+            DrawText("  shrink the n-patches.", 40, 60, 10, DARKGRAY);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    UnloadTexture(nPatchTexture);       // Texture unloading
+
+    CloseWindow();                // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}